diff options
Diffstat (limited to 'plugins/FreeImage/Source/LibPNG')
26 files changed, 3854 insertions, 2142 deletions
diff --git a/plugins/FreeImage/Source/LibPNG/ANNOUNCE b/plugins/FreeImage/Source/LibPNG/ANNOUNCE index cf41308991..e8498a379c 100644 --- a/plugins/FreeImage/Source/LibPNG/ANNOUNCE +++ b/plugins/FreeImage/Source/LibPNG/ANNOUNCE @@ -1,5 +1,5 @@ -Libpng 1.5.4 - July 7, 2011
+Libpng 1.5.9 - February 18, 2012
This is a public release of libpng, intended for use in production codes.
@@ -8,174 +8,30 @@ Files available for download: Source files with LF line endings (for Unix/Linux) and with a
"configure" script
- libpng-1.5.4.tar.xz (LZMA-compressed, recommended)
- libpng-1.5.4.tar.gz
- libpng-1.5.4.tar.bz2
+ libpng-1.5.9.tar.xz (LZMA-compressed, recommended)
+ libpng-1.5.9.tar.gz
+ libpng-1.5.9.tar.bz2
Source files with CRLF line endings (for Windows), without the
"configure" script
- lpng154.7z (LZMA-compressed, recommended)
- lpng154.zip
+ lpng159.7z (LZMA-compressed, recommended)
+ lpng159.zip
Other information:
- libpng-1.5.4-README.txt
- libpng-1.5.4-LICENSE.txt
+ libpng-1.5.9-README.txt
+ libpng-1.5.9-LICENSE.txt
-Changes since the last public release (1.5.2):
+Changes since the last public release (1.5.8):
- Re-initialize the zlib compressor before compressing non-IDAT chunks.
- Added API functions to set parameters for zlib compression of non-IDAT
- chunks.
- Updated scripts/symbols.def with new API functions.
- Only compile the new zlib re-initializing code when text or iCCP is
- supported, using PNG_WRITE_COMPRESSED_TEXT_SUPPORTED macro.
- Improved the optimization of the zlib CMF byte (see libpng-1.2.6).
- Optimize the zlib CMF byte in non-IDAT compressed chunks
- Fixed gcc -ansi -pedantic compile. A strict ANSI system does not have
- snprintf, and the "__STRICT_ANSI__" detects that condition more reliably
- than __STDC__ (John Bowler).
- Removed the PNG_PTR_NORETURN attribute because it too dangerous. It tells
- the compiler that a user supplied callback (the error handler) does not
- return, yet there is no guarantee in practice that the application code
- will correctly implement the error handler because the compiler only
- issues a warning if there is a mistake (John Bowler).
- Removed the no-longer-used PNG_DEPSTRUCT macro.
- Updated the zlib version to 1.2.5 in the VStudio project.
- Fixed 64-bit builds where png_uint_32 is smaller than png_size_t in
- pngwutil.c (John Bowler).
- Fixed bug with stripping the filler or alpha channel when writing, that
- was introduced in libpng-1.5.2 (bug report by Andrew Church).
- Updated pngtest.png with the new zlib CMF optimization.
- Cleaned up conditional compilation code and of background/gamma handling
- Internal changes only except a new option to avoid compiling the
- png_build_grayscale_palette API (which is not used at all internally.)
- The main change is to move the transform tests (READ_TRANSFORMS,
- WRITE_TRANSFORMS) up one level to the caller of the APIs. This avoids
- calls to spurious functions if all transforms are disabled and slightly
- simplifies those functions. Pngvalid modified to handle this.
- A minor change is to stop the strip_16 and expand_16 interfaces from
- disabling each other; this allows the future alpha premultiplication
- code to use 16-bit intermediate values while still producing 8-bit output.
- png_do_background and png_do_gamma have been simplified to take a single
- pointer to the png_struct rather than pointers to every item required
- from the png_struct. This makes no practical difference to the internal
- code.
- A serious bug in the pngvalid internal routine 'standard_display_init' has
- been fixed - this failed to initialize the red channel and accidentally
- initialized the alpha channel twice.
- Changed png_struct jmp_buf member name from png_jmpbuf to tmp_jmpbuf to
- avoid a clash with the png_jmpbuf macro on some platforms.
- Added appropriate feature test macros to ensure libpng sees the correct API
- _POSIX_SOURCE is defined in pngpriv.h, pngtest.c and pngvalid.c to ensure
- that POSIX conformant systems disable non-POSIX APIs. _ISOC99_SOURCE is
- defined in pngpriv.h to obtain the ISO C99 snprintf definition, when
- available.
- Removed png_snprintf and added formatted warning messages. This change adds
- internal APIs to allow png_warning messages to have parameters without
- requiring the host OS to implement snprintf. As a side effect the
- dependency of the tIME-supporting RFC1132 code on stdio is removed and
- PNG_NO_WARNINGS does actually work now.
- Added PNG_WRITE_OPTIMIZE_CMF_SUPPORTED macro to make the zlib "CMF" byte
- optimization configureable.
- Internal functions were added to claim/release the z_stream and, hopefully,
- make the code more robust. Also deflateEnd checking is added - previously
- libpng would ignore an error at the end of the stream.
- Removed the -D_ALL_SOURCE from definitions for AIX in CMakeLists.txt
- Implemented premultiplied alpha support: png_set_alpha_mode API
- Added expand_16 support to the high level interface.
- Added named value and 'flag' gamma support to png_set_gamma. Made a minor
- change from the previous (unreleased) ABI/API to hide the exact value used
- for Macs - it's not a good idea to embed this in the ABI!
- Moved macro definitions for PNG_HAVE_IHDR, PNG_HAVE_PLTE, and PNG_AFTER_IDAT
- from pngpriv.h to png.h because they must be visible to applications
- that call png_set_unknown_chunks().
- Check for up->location !PNG_AFTER_IDAT when writing unknown chunks
- before IDAT.
- Improved "pngvalid --speed" to exclude more of pngvalid from the time.
- Documented png_set_alpha_mode(), other changes in libpng.3/libpng-manual.txt
- The cHRM chunk now sets the defaults for png_set_rgb_to_gray() (when negative
- parameters are supplied by the caller), while in the absence of cHRM
- sRGB/Rec 709 values are still used.
- The bKGD chunk no longer overwrites the background value set by
- png_set_background(), allowing the latter to be used before the file
- header is read. It never performed any useful function to override
- the default anyway.
- Added memory overwrite and palette image checks to pngvalid.c
- Previously palette image code was poorly checked. Since the transformation
- code has a special palette path in most cases this was a severe weakness.
- Minor cleanup and some extra checking in pngrutil.c and pngrtran.c. When
- expanding an indexed image, always expand to RGBA if transparency is
- present.
- Reversed earlier 1.5.3 change of transformation order; move png_expand_16
- back where it was. The change doesn't work because it requires 16-bit
- gamma tables when the code only generates 8-bit ones. This fails
- silently; the libpng code just doesn't do any gamma correction. Moving
- the tests back leaves the old, inaccurate, 8-bit gamma calculations, but
- these are clearly better than none!
- png_set_background() and png_expand_16() did not work together correctly.
- This problem is present in 1.5.2; if png_set_background is called with
- need_expand false and the matching 16 bit color libpng erroneously just
- treats it as an 8-bit color because of where png_do_expand_16 is in the
- transform list. This simple fix reduces the supplied colour to 8-bits,
- so it gets smashed, but this is better than the current behavior.
- Added tests for expand16, more fixes for palette image tests to pngvalid.
- Corrects the code for palette image tests and disables attempts to
- validate palette colors.
- Fixed uninitialized memory read in png_format_buffer() (Bug report by
- Frank Busse, related to CVE-2004-0421).
- Fixed png_handle_sCAL which is broken in 1.5; added sCAL to pngtest.png
- Revised documentation about png_set_user_limits() to say that it also affects
- png writing.
- Revised handling of png_set_user_limits() so that it can increase the
- limit beyond the PNG_USER_WIDTH|HEIGHT_MAX; previously it could only
- reduce it.
- Make the 16-to-8 scaling accurate. Dividing by 256 with no rounding is
- wrong (high by one) 25% of the time. Dividing by 257 with rounding is
- wrong in 128 out of 65536 cases. Getting the right answer all the time
- without division is easy.
- Added "_SUPPORTED" to the PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION macro.
- Added projects/owatcom, an IDE project for OpenWatcom to replace
- scripts/makefile.watcom. This project works with OpenWatcom 1.9. The
- IDE autogenerates appropriate makefiles (libpng.mk) for batch processing.
- The project is configurable, unlike the Visual Studio project, so long
- as the developer has an awk.
- Changed png_set_gAMA to limit the gamma value range so that the inverse
- of the stored value cannot overflow the fixed point representation,
- and changed other things OpenWatcom warns about.
- Revised pngvalid.c to test PNG_ALPHA_MODE_SUPPORTED correctly. This allows
- pngvalid to build when ALPHA_MODE is not supported, which is required if
- it is to build on libpng 1.4.
- Removed string/memory macros that are no longer used and are not
- necessarily fully supportable, particularly png_strncpy and png_snprintf.
- Added log option to pngvalid.c and attempted to improve gamma messages.
- People found the presence of a beta release following an rc release
- to be confusing; therefore we bump the version to libpng-1.5.4beta01
- and there will be no libpng-1.5.3 release.
- Moved definitions of PNG_HAVE_IHDR, PNG_AFTER_IDAT, and PNG_HAVE_PLTE
- outside of an unknown-chunk block in png.h because they are also
- needed for other uses.
- Added png_set_scale_16() API, to match inaccurate results from previous
- libpng versions, configurable with PNG_READ_SCALE_16_TO_8_SUPPORTED.
- Fixed a problem in png_do_expand_palette() exposed by optimization in
- 1.5.3beta06
- Also removed a spurious and confusing "trans" member ("trans") from png_info.
- The palette expand optimization prevented expansion to an intermediate RGBA
- form if tRNS was present but alpha was marked to be stripped; this exposed
- a check for tRNS in png_do_expand_palette() which is inconsistent with the
- code elsewhere in libpng.
- Added PNG_TRANSFORM_SCALE_16 to the high-level read transforms.
- If PNG_READ_16_TO_8_ACCURATE_SCALE is not enabled, png_set_scale_16()
- and png_do_scale_16_to_8() aren't built.
- Revised contrib/visupng, gregbook, and pngminim to demonstrate scale_16_to_8
- Fixed pngvalid, simplified macros, added checking for 0 in sCAL.
- The ACCURATE scale macro is no longer defined in libpng-1.5 - call the
- png_scale_16_to_8 API. Made sure that PNG_READ_16_TO_8 is still defined
- if the png_strip_16_to_8 API is present. png_check_fp_number now
- maintains some state so that positive, negative and zero values are
- identified. sCAL uses these to be strictly spec conformant.
- Define PNG_ALLOCATED to "restrict" only if MSC_VER >= 1400.
+ Rebuilt configure scripts in the tar distributions.
+ Removed two unused definitions from scripts/pnglibconf.h.prebuilt
+ Removed some unused arrays (with #ifdef) from png_read_push_finish_row().
+ Removed tests for no-longer-used *_EMPTY_PLTE_SUPPORTED from pngstruct.h
+ Fixed CVE-2011-3026 buffer overrun bug. Deal more correctly with the test
+ on iCCP chunk length. Also removed spurious casts that may hide problems
+ on 16-bit systems.
Send comments/corrections/commendations to png-mng-implement at lists.sf.net
(subscription required; visit
@@ -184,12 +40,3 @@ to subscribe) or to glennrp at users.sourceforge.net
Glenn R-P
-*/ }
-#endif
-
-Send comments/corrections/commendations to png-mng-implement at lists.sf.net
-(subscription required; visit
-https://lists.sourceforge.net/lists/listinfo/png-mng-implement
-to subscribe) or to glennrp at users.sourceforge.net
-
-Glenn R-P
diff --git a/plugins/FreeImage/Source/LibPNG/CHANGES b/plugins/FreeImage/Source/LibPNG/CHANGES index 05c764fc07..fb3a90be8c 100644 --- a/plugins/FreeImage/Source/LibPNG/CHANGES +++ b/plugins/FreeImage/Source/LibPNG/CHANGES @@ -1,5 +1,4 @@ #if 0
-libpng_changes(){ /*
CHANGES - changes for libpng
Version 0.2
@@ -180,7 +179,7 @@ Version 0.96 [May, 1997] Fixed serious bug with < 8bpp images introduced in 0.95
Fixed 256-color transparency bug (Greg Roelofs)
Fixed up documentation (Greg Roelofs, Laszlo Nyul)
- Fixed "error" in pngconf.h for Linux setjmp() behaviour
+ Fixed "error" in pngconf.h for Linux setjmp() behavior
Fixed DOS medium model support (Tim Wegner)
Fixed png_check_keyword() for case with error in static string text
Added read of CRC after IEND chunk for embedded PNGs (Laszlo Nyul)
@@ -197,18 +196,20 @@ Version 0.97 [January, 1998] Added more typecasts. 65536L becomes (png_uint_32)65536L, etc. (Glenn R-P)
Minor corrections in libpng.txt
Added simple sRGB support (Glenn R-P)
- Easier conditional compiling, e.g. define PNG_READ/WRITE_NOT_FULLY_SUPPORTED;
+ Easier conditional compiling, e.g.,
+ define PNG_READ/WRITE_NOT_FULLY_SUPPORTED;
all configurable options can be selected from command-line instead
of having to edit pngconf.h (Glenn R-P)
Fixed memory leak in pngwrite.c (free info_ptr->text) (Glenn R-P)
Added more conditions for png_do_background, to avoid changing
black pixels to background when a background is supplied and
no pixels are transparent
- Repaired PNG_NO_STDIO behaviour
- Tested NODIV support and made it default behaviour (Greg Roelofs)
+ Repaired PNG_NO_STDIO behavior
+ Tested NODIV support and made it default behavior (Greg Roelofs)
Added "-m" option and PNGTEST_DEBUG_MEMORY to pngtest (John Bowler)
Regularized version numbering scheme and bumped shared-library major
- version number to 2 to avoid problems with libpng 0.89 apps (Greg Roelofs)
+ version number to 2 to avoid problems with libpng 0.89 apps
+ (Greg Roelofs)
Version 0.98 [January, 1998]
Cleaned up some typos in libpng.txt and in code documentation
@@ -1778,7 +1779,7 @@ Version 1.2.13beta1 [October 2, 2006] Removed AC_FUNC_MALLOC from configure.ac
Work around Intel-Mac compiler bug by setting PNG_NO_MMX_CODE in pngconf.h
Change "logical" to "bitwise" throughout documentation.
- Detect and fix attempt to write wrong iCCP profile length.
+ Detect and fix attempt to write wrong iCCP profile length (CVE-2006-7244)
Version 1.0.21, 1.2.13 [November 14, 2006]
Fix potential buffer overflow in sPLT chunk handler.
@@ -2361,7 +2362,7 @@ Version 1.4.0beta72 [August 1, 2009] Version 1.4.0beta73 [August 1, 2009]
Reject attempt to write iCCP chunk with negative embedded profile length
- (JD Chen)
+ (JD Chen) (CVE-2009-5063).
Version 1.4.0beta74 [August 8, 2009]
Changed png_ptr and info_ptr member "trans" to "trans_alpha".
@@ -3149,8 +3150,8 @@ version 1.5.1beta01 [January 8, 2011] in version 1.5.0beta36 but is not noted in the CHANGES. Similarly,
it was changed from png_charpp to png_const_bytepp in png_set_iCCP().
Ensure that png_rgb_to_gray ignores palette mapped images, if libpng
- internally happens to call it with one.
- Fixed a failure to handle palette mapped images correctly.
+ internally happens to call it with one, and fixed a failure to handle
+ palette mapped images correctly. This fixes CVE-2690.
Version 1.5.1beta02 [January 14, 2011]
Fixed a bug in handling of interlaced images (bero at arklinux.org).
@@ -3289,8 +3290,8 @@ Version 1.5.2 [March 31, 2011] Version 1.5.3beta01 [April 1, 2011]
Re-initialize the zlib compressor before compressing non-IDAT chunks.
- Added API functions to set parameters for zlib compression of non-IDAT
- chunks.
+ Added API functions (png_set_text_compression_level() and four others) to
+ set parameters for zlib compression of non-IDAT chunks.
Version 1.5.3beta02 [April 3, 2011]
Updated scripts/symbols.def with new API functions.
@@ -3347,7 +3348,7 @@ Version 1.5.3beta05 [May 6, 2011] dependency of the tIME-supporting RFC1132 code on stdio is removed and
PNG_NO_WARNINGS does actually work now.
Pass "" instead of '\0' to png_default_error() in png_err(). This mistake
- was introduced in libpng-1.2.20beta01.
+ was introduced in libpng-1.2.20beta01. This fixes CVE-2011-2691.
Added PNG_WRITE_OPTIMIZE_CMF_SUPPORTED macro to make the zlib "CMF" byte
optimization configureable.
IDAT compression failed if preceded by a compressed text chunk (bug
@@ -3378,7 +3379,8 @@ Version 1.5.3beta08 [May 16, 2011] Documented png_set_alpha_mode(), other changes in libpng.3/libpng-manual.txt
The cHRM chunk now sets the defaults for png_set_rgb_to_gray() (when negative
parameters are supplied by the caller), while in the absence of cHRM
- sRGB/Rec 709 values are still used.
+ sRGB/Rec 709 values are still used. This introduced a divide-by-zero
+ bug in png_handle_cHRM().
The bKGD chunk no longer overwrites the background value set by
png_set_background(), allowing the latter to be used before the file
header is read. It never performed any useful function to override
@@ -3418,7 +3420,8 @@ Version 1.5.3rc02 [June 8, 2011] Frank Busse, CVE-2011-2501, related to CVE-2004-0421).
Version 1.5.3beta11 [June 11, 2011]
- Fixed png_handle_sCAL which is broken in 1.5; added sCAL to pngtest.png
+ Fixed png_handle_sCAL which is broken in 1.5. This fixes CVE 2011-2692.
+ Added sCAL to pngtest.png
Revised documentation about png_set_user_limits() to say that it also affects
png writing.
Revised handling of png_set_user_limits() so that it can increase the
@@ -3443,7 +3446,7 @@ Version 1.5.3beta11 [June 11, 2011] Removed string/memory macros that are no longer used and are not
necessarily fully supportable, particularly png_strncpy and png_snprintf.
Added log option to pngvalid.c and attempted to improve gamma messages.
-
+
Version 1.5.3 [omitted]
People found the presence of a beta release following an rc release
to be confusing; therefore we bump the version to libpng-1.5.4beta01
@@ -3507,6 +3510,305 @@ Version 1.5.4rc01 [June 30, 2011] Define PNG_ALLOCATED to "restrict" only if MSC_VER >= 1400.
Version 1.5.4 [July 7, 2011]
+ No changes.
+
+Version 1.5.5beta01 [July 13, 2011]
+ Fixed some typos and made other minor changes in the manual.
+ Updated contrib/pngminus/makefile.std (Samuli Souminen)
+
+Version 1.5.5beta02 [July 14, 2011]
+ Revised Makefile.am and Makefile.in to look in the right directory for
+ pnglibconf.h.prebuilt
+
+Version 1.5.5beta03 [July 27, 2011]
+ Enabled compilation with g++ compiler. This compiler does not recognize
+ the file extension, so it always compiles with C++ rules. Made minor
+ changes to pngrutil.c to cast results where C++ expects it but C does not.
+ Minor editing of libpng.3 and libpng-manual.txt.
+
+Version 1.5.5beta04 [July 29, 2011]
+ Revised CMakeLists.txt (Clifford Yapp)
+ Updated commentary about the png_rgb_to_gray() default coefficients
+ in the manual and in pngrtran.c
+
+Version 1.5.5beta05 [August 17, 2011]
+ Prevent unexpected API exports from non-libpng DLLs on Windows. The "_DLL"
+ is removed from the test of whether a DLL is being built (this erroneously
+ caused the libpng APIs to be marked as DLL exports in static builds under
+ Microsoft Visual Studio). Almost all of the libpng building configuration
+ is moved from pngconf.h to pngpriv.h, but PNG_DLL_EXPORT remains in
+ pngconf.h, though, so that it is colocated with the import definition (it
+ is no longer used anywhere in the installed headers). The VStudio project
+ definitions have been cleaned up: "_USRDLL" has been removed from the
+ static library builds (this was incorrect), and PNG_USE_DLL has been added
+ to pngvalid to test the functionality (pngtest does not supply it,
+ deliberately). The spurious "_EXPORTS" has been removed from the
+ libpng build (all these errors were a result of copy/paste between project
+ configurations.)
+ Added new types and internal functions for CIE RGB end point handling to
+ pngpriv.h (functions yet to be implemented).
+
+Version 1.5.5beta06 [August 26, 2011]
+ Ensure the CMAKE_LIBRARY_OUTPUT_DIRECTORY is set in CMakeLists.txt
+ (Clifford Yap)
+ Fixes to rgb_to_gray and cHRM XYZ APIs (John Bowler):
+ The rgb_to_gray code had errors when combined with gamma correction.
+ Some pixels were treated as true grey when they weren't and such pixels
+ and true grey ones were not gamma corrected (the original value of the
+ red component was used instead). APIs to get and set cHRM using color
+ space end points have been added and the rgb_to_gray code that defaults
+ based on cHRM, and the divide-by-zero bug in png_handle_cHRM (CERT
+ VU#477046, CVE-2011-3328, introduced in 1.5.4) have been corrected.
+ A considerable number of tests has been added to pngvalid for the
+ rgb_to_gray transform.
+ Arithmetic errors in rgb_to_gray whereby the calculated gray value was
+ truncated to the bit depth rather than rounded have been fixed except in
+ the 8-bit non-gamma-corrected case (where consistency seems more important
+ than correctness.) The code still has considerable inaccuracies in the
+ 8-bit case because 8-bit linear arithmetic is used.
+
+Version 1.5.5beta07 [September 7, 2011]
+ Added "$(ARCH)" option to makefile.darwin
+ Added SunOS support to configure.ac and Makefile.am
+ Changed png_chunk_benign_error() to png_warning() in png.c, in
+ png_XYZ_from_xy_checked().
+
+Version 1.5.5beta08 [September 10, 2011]
+ Fixed 64-bit compilation errors (gcc). The errors fixed relate
+ to conditions where types that are 32 bits in the GCC 32-bit
+ world (uLong and png_size_t) become 64 bits in the 64-bit
+ world. This produces potential truncation errors which the
+ compiler correctly flags.
+ Relocated new HAVE_SOLARIS_LD definition in configure.ac
+ Constant changes for 64-bit compatibility (removal of L suffixes). The
+ 16-bit cases still use "L" as we don't have a 16-bit test system.
+
+Version 1.5.5rc01 [September 15, 2011]
+ Removed "L" suffixes in pngpriv.h
+
+Version 1.5.5 [September 22, 2011]
+ No changes.
+
+Version 1.5.6beta01 [September 22, 2011]
+ Fixed some 64-bit type conversion warnings in pngrtran.c
+ Moved row_info from png_struct to a local variable.
+ The various interlace mask arrays have been made into arrays of
+ bytes and made PNG_CONST and static (previously some arrays were
+ marked PNG_CONST and some weren't).
+ Additional checks have been added to the transform code to validate the
+ pixel depths after the transforms on both read and write.
+ Removed some redundant code from pngwrite.c, in png_destroy_write_struct().
+ Changed chunk reading/writing code to use png_uint_32 instead of png_byte[4].
+ This removes the need to allocate temporary strings for chunk names on
+ the stack in the read/write code. Unknown chunk handling still uses the
+ string form because this is exposed in the API.
+
+Version 1.5.6beta02 [September 26, 2011]
+ Added a note in the manual the png_read_update_info() must be called only
+ once with a particular info_ptr.
+ Fixed a typo in the definition of the new PNG_STRING_FROM_CHUNK(s,c) macro.
+
+Version 1.5.6beta03 [September 28, 2011]
+ Revised test-pngtest.sh to report FAIL when pngtest fails.
+ Added "--strict" option to pngtest, to report FAIL when the failure is
+ only because the resulting valid files are different.
+ Revised CMakeLists.txt to work with mingw and removed some material from
+ CMakeLists.txt that is no longer useful in libpng-1.5.
+
+Version 1.5.6beta04 [October 5, 2011]
+ Fixed typo in Makefile.in and Makefile.am ("-M Wl" should be "-M -Wl")."
+
+Version 1.5.6beta05 [October 12, 2011]
+ Speed up png_combine_row() for interlaced images. This reduces the generality
+ of the code, allowing it to be optimized for Adam7 interlace. The masks
+ passed to png_combine_row() are now generated internally, avoiding
+ some code duplication and localizing the interlace handling somewhat.
+ Align png_struct::row_buf - previously it was always unaligned, caused by
+ a bug in the code that attempted to align it; the code needs to subtract
+ one from the pointer to take account of the filter byte prepended to
+ each row.
+ Optimized png_combine_row() when rows are aligned. This gains a small
+ percentage for 16-bit and 32-bit pixels in the typical case where the
+ output row buffers are appropriately aligned. The optimization was not
+ previously possible because the png_struct buffer was always misaligned.
+ Fixed bug in png_write_chunk_header() debug print, introduced in 1.5.6beta01.
+
+Version 1.5.6beta06 [October 17, 2011]
+ Removed two redundant tests for unitialized row.
+ Fixed a relatively harmless memory overwrite in compressed text writing
+ with a 1 byte zlib buffer.
+ Add ability to call png_read_update_info multiple times to pngvalid.c.
+ Fixes for multiple calls to png_read_update_info. These fixes attend to
+ most of the errors revealed in pngvalid, however doing the gamma work
+ twice results in inaccuracies that can't be easily fixed. There is now
+ a warning in the code if this is going to happen.
+ Turned on multiple png_read_update_info in pngvalid transform tests.
+ Prevent libpng from overwriting unused bits at the end of the image when
+ it is not byte aligned, while reading. Prior to libpng-1.5.6 libpng would
+ overwrite the partial byte at the end of each row if the row width was not
+ an exact multiple of 8 bits and the image is not interlaced.
+
+Version 1.5.6beta07 [October 21, 2011]
+ Made png_ptr->prev_row an aligned pointer into png_ptr->big_prev_row
+ (Mans Rullgard).
+
+Version 1.5.6rc01 [October 26, 2011]
+ Changed misleading "Missing PLTE before cHRM" warning to "Out of place cHRM"
+
+Version 1.5.6rc02 [October 27, 2011]
+ Added LSR() macro to defend against buggy compilers that evaluate non-taken
+ code branches and complain about out-of-range shifts.
+
+Version 1.5.6rc03 [October 28, 2011]
+ Renamed the LSR() macro to PNG_LSR() and added PNG_LSL() macro.
+ Fixed compiler warnings with Intel and MSYS compilers. The logical shift
+ fix for Microsoft Visual C is required by other compilers, so this
+ enables that fix for all compilers when using compile-time constants.
+ Under MSYS 'byte' is a name declared in a system header file, so we
+ changed the name of a local variable to avoid the warnings that result.
+ Added #define PNG_ALIGN_TYPE PNG_ALIGN_NONE to contrib/pngminim/*/pngusr.h
+
+Version 1.5.6 [November 3, 2011]
+ No changes.
+
+Version 1.5.7beta01 [November 4, 2011]
+ Added support for ARM processor (Mans Rullgard)
+ Fixed bug in pngvalid on early allocation failure; fixed type cast in
+ pngmem.c; pngvalid would attempt to call png_error() if the allocation
+ of a png_struct or png_info failed. This would probably have led to a
+ crash. The pngmem.c implementation of png_malloc() included a cast
+ to png_size_t which would fail on large allocations on 16-bit systems.
+ Fix for the preprocessor of the Intel C compiler. The preprocessor
+ splits adjacent @ signs with a space; this changes the concatentation
+ token from @-@-@ to PNG_JOIN; that should work with all compiler
+ preprocessors.
+ Paeth filter speed improvements from work by Siarhei Siamashka. This
+ changes the 'Paeth' reconstruction function to improve the GCC code
+ generation on x86. The changes are only part of the suggested ones;
+ just the changes that definitely improve speed and remain simple.
+ The changes also slightly increase the clarity of the code.
+
+Version 1.5.7beta02 [November 11, 2011]
+ Check compression_type parameter in png_get_iCCP and remove spurious
+ casts. The compression_type parameter is always assigned to, so must
+ be non-NULL. The cast of the profile length potentially truncated the
+ value unnecessarily on a 16-bit int system, so the cast of the (byte)
+ compression type to (int) is specified by ANSI-C anyway.
+ Fixed FP division by zero in pngvalid.c; the 'test_pixel' code left
+ the sBIT fields in the test pixel as 0, which resulted in a floating
+ point division by zero which was irrelevant but causes systems where
+ FP exceptions cause a crash. Added code to pngvalid to turn on FP
+ exceptions if the appropriate glibc support is there to ensure this is
+ tested in the future.
+ Updated scripts/pnglibconf.mak and scripts/makefile.std to handle the
+ new PNG_JOIN macro.
+ Added versioning to pnglibconf.h comments.
+ Simplified read/write API initial version; basic read/write tested on
+ a variety of images, limited documentation (in the header file.)
+ Installed more accurate linear to sRGB conversion tables. The slightly
+ modified tables reduce the number of 16-bit values that
+ convert to an off-by-one 8-bit value. The "makesRGB.c" code that was used
+ to generate the tables is now in a contrib/sRGBtables sub-directory.
+
+Version 1.5.7beta03 [November 17, 2011]
+ Removed PNG_CONST from the sRGB table declarations in pngpriv.h and png.c
+ Added run-time detection of NEON support.
+ Added contrib/libtests; includes simplified API test and timing test and
+ a color conversion utility for rapid checking of failed 'pngstest' results.
+ Multiple transform bug fixes plus a work-round for double gamma correction.
+ libpng does not support more than one transform that requires linear data
+ at once - if this is tried typically the results is double gamma
+ correction. Since the simplified APIs can need rgb to gray combined with
+ a compose operation it is necessary to do one of these outside the main
+ libpng transform code. This check-in also contains fixes to various bugs
+ in the simplified APIs themselves and to some bugs in compose and rgb to
+ gray (on palette) itself.
+ Fixes for C++ compilation using g++ When libpng source is compiled
+ using g++. The compiler imposes C++ rules on the C source; thus it
+ is desireable to make the source work with either C or C++ rules
+ without throwing away useful error information. This change adds
+ png_voidcast to allow C semantic (void*) cases or the corresponding
+ C++ static_cast operation, as appropriate.
+ Added --noexecstack to assembler file compilation. GCC does not set
+ this on assembler compilation, even though it does on C compilation.
+ This creates security issues if assembler code is enabled; the
+ work-around is to set it by default in the flags for $(CCAS)
+ Work around compilers that don't support declaration of const data. Some
+ compilers fault 'extern const' data declarations (because the data is
+ not initialized); this turns on const-ness only for compilers where
+ this is known to work.
+
+Version 1.5.7beta04 [November 17, 2011]
+ Since the gcc driver does not recognize the --noexecstack flag, we must
+ use the -Wa prefix to have it passed through to the assembler.
+ Also removed a duplicate setting of this flag.
+ Added files that were omitted from the libpng-1.5.7beta03 zip distribution.
+
+Version 1.5.7beta05 [November 25, 2011]
+ Removed "zTXt" from warning in generic chunk decompression function.
+ Validate time settings passed to pngset() and png_convert_to_rfc1123()
+ (Frank Busse).
+ Added MINGW support to CMakeLists.txt
+ Reject invalid compression flag or method when reading the iTXt chunk.
+ Backed out 'simplified' API changes. The API seems too complex and there
+ is a lack of consensus or enthusiasm for the proposals. The API also
+ reveals significant bugs inside libpng (double gamma correction and the
+ known bug of being unable to retrieve a corrected palette). It seems
+ better to wait until the bugs, at least, are corrected.
+ Moved pngvalid.c into contrib/libtests
+ Rebuilt Makefile.in, configure, etc., with autoconf-2.68
+
+Version 1.5.7rc01 [December 1, 2011]
+ Replaced an "#if" with "#ifdef" in pngrtran.c
+ Revised #if PNG_DO_BC block in png.c (use #ifdef and add #else)
+
+Version 1.5.7rc02 [December 5, 2011]
+ Revised project files and contrib/pngvalid/pngvalid.c to account for
+ the relocation of pngvalid into contrib/libtests.
+ Revised pngconf.h to use " __declspec(restrict)" only when MSC_VER >= 1400,
+ as in libpng-1.5.4.
+ Put CRLF line endings in the owatcom project files.
+
+Version 1.5.7rc03 [December 7, 2011]
+ Updated CMakeLists.txt to account for the relocation of pngvalid.c
+
+Version 1.5.7 [December 15, 2011]
+ Minor fixes to pngvalid.c for gcc 4.6.2 compatibility to remove warnings
+ reported by earlier versions.
+
+Version 1.5.8beta01 [January 15, 2011]
+ Removed '#include config.h"' from contrib/libtests/pngvalid.c. It's not
+ needed and causes trouble for VPATH building.
+ Moved AC_MSG_CHECKING([if libraries can be versioned]) later to the proper
+ location in configure.ac (Gilles Espinasse).
+ Fix bug in pngerror.c: some long warnings were being improperly truncated
+ (CVE-2011-3464, bug introduced in libpng-1.5.3beta05).
+
+Version 1.5.8rc01 [January 21, 2012]
+ No changes.
+
+Version 1.5.8rc02 [January 25, 2012]
+ Fixed Min/GW uninstall to remove libpng.dll.a
+ Conditionalize the install rules for MINGW and CYGWIN in CMakeLists.txt
+
+Version 1.5.8 [February 1, 2012]
+ No changes.
+
+Version 1.5.9beta01 [February 3, 2012]
+ Rebuilt configure scripts in the tar distributions.
+
+Version 1.5.9beta02 [February 16, 2012]
+ Removed two unused definitions from scripts/pnglibconf.h.prebuilt
+ Removed some unused arrays (with #ifdef) from png_read_push_finish_row().
+ Removed tests for no-longer-used *_EMPTY_PLTE_SUPPORTED from pngstruct.h
+
+Version 1.5.9rc01 [February 17, 2012]
+ Fixed CVE-2011-3026 buffer overrun bug. Deal more correctly with the test
+ on iCCP chunk length. Also removed spurious casts that may hide problems
+ on 16-bit systems.
+
+Version 1.5.9 [February 18, 2012]
+ No changes.
Send comments/corrections/commendations to png-mng-implement at lists.sf.net
(subscription required; visit
@@ -3515,5 +3817,4 @@ to subscribe) or to glennrp at users.sourceforge.net
Glenn R-P
-*/ }
#endif
diff --git a/plugins/FreeImage/Source/LibPNG/LICENSE b/plugins/FreeImage/Source/LibPNG/LICENSE index 2269a08a1b..0c927409ac 100644 --- a/plugins/FreeImage/Source/LibPNG/LICENSE +++ b/plugins/FreeImage/Source/LibPNG/LICENSE @@ -10,7 +10,7 @@ this sentence. This code is released under the libpng license.
-libpng versions 1.2.6, August 15, 2004, through 1.5.4, July 7, 2011, are
+libpng versions 1.2.6, August 15, 2004, through 1.5.9, February 18, 2012, are
Copyright (c) 2004, 2006-2011 Glenn Randers-Pehrson, and are
distributed according to the same disclaimer and license as libpng-1.2.5
with the following individual added to the list of Contributing Authors
@@ -108,4 +108,4 @@ certification mark of the Open Source Initiative. Glenn Randers-Pehrson
glennrp at users.sourceforge.net
-July 7, 2011
+February 18, 2012
diff --git a/plugins/FreeImage/Source/LibPNG/README b/plugins/FreeImage/Source/LibPNG/README index d24c518b7e..c648a5ad78 100644 --- a/plugins/FreeImage/Source/LibPNG/README +++ b/plugins/FreeImage/Source/LibPNG/README @@ -1,4 +1,4 @@ -README for libpng version 1.5.4 - July 7, 2011 (shared library 15.0)
+README for libpng version 1.5.9 - February 18, 2012 (shared library 15.0)
See the note about version numbers near the top of png.h
See INSTALL for instructions on how to install libpng.
diff --git a/plugins/FreeImage/Source/LibPNG/configure b/plugins/FreeImage/Source/LibPNG/configure index dfa1c70b12..9da0f74eca 100644 --- a/plugins/FreeImage/Source/LibPNG/configure +++ b/plugins/FreeImage/Source/LibPNG/configure @@ -1,14 +1,14 @@ echo "
There is no \"configure\" script in this distribution of
- libpng-1.5.4.
+ libpng-1.5.9.
Instead, please copy the appropriate makefile for your system from the
\"scripts\" directory. Read the INSTALL file for more details.
Update, July 2004: you can get a \"configure\" based distribution
from the libpng distribution sites. Download the file
- libpng-1.5.4.tar.gz, libpng-1.5.4.tar.xz, or libpng-1.5.4.tar.bz2
+ libpng-1.5.9.tar.gz, libpng-1.5.9.tar.xz, or libpng-1.5.9.tar.bz2
If the line endings in the files look funny, which is likely to be the
case if you were trying to run \"configure\" on a Linux machine, you may
diff --git a/plugins/FreeImage/Source/LibPNG/libpng.3 b/plugins/FreeImage/Source/LibPNG/libpng.3 index 0a73c5960f..1d72ab4cae 100644 --- a/plugins/FreeImage/Source/LibPNG/libpng.3 +++ b/plugins/FreeImage/Source/LibPNG/libpng.3 @@ -1,6 +1,6 @@ -.TH LIBPNG 3 "July 7, 2011"
+.TH LIBPNG 3 "February 18, 2012"
.SH NAME
-libpng \- Portable Network Graphics (PNG) Reference Library 1.5.4
+libpng \- Portable Network Graphics (PNG) Reference Library 1.5.9
.SH SYNOPSIS
\fI\fB
@@ -128,10 +128,22 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.5.4 \fI\fB
-\fBpng_uint_32 png_get_chunk_cache_max (png_const_structp \fIpng_ptr\fP\fB);\fP
+\fBpng_uint_32 png_get_cHRM_XYZ (png_structp \fIpng_ptr,
+
+\fBpng_const_infop \fP\fIinfo_ptr\fP\fB, double \fP\fI*red_X\fP\fB, double \fP\fI*red_Y\fP\fB, double \fI*red_Z,
+
+\fBdouble \fP\fI*green_X\fP\fB, double \fP\fI*green_Y\fP\fB, double \fP\fI*green_Z\fP\fB, double \fI*blue_X,
+
+\fBdouble \fP\fI*blue_Y\fP\fB, double \fI*blue_Z\fP\fB);\fP
\fI\fB
+\fBpng_uint_32 png_get_cHRM_XYZ_fixed (png_structp \fP\fIpng_ptr\fP\fB, png_const_infop \fP\fIinfo_ptr\fP\fB, png_fixed_point \fP\fI*int_red_X\fP\fB, png_fixed_point \fP\fI*int_red_Y\fP\fB, png_fixed_point \fP\fI*int_red_Z\fP\fB, png_fixed_point \fP\fI*int_green_X\fP\fB, png_fixed_point \fP\fI*int_green_Y\fP\fB, png_fixed_point \fP\fI*int_green_Z\fP\fB, png_fixed_point \fP\fI*int_blue_X\fP\fB, png_fixed_point \fP\fI*int_blue_Y\fP\fB, png_fixed_point \fI*int_blue_Z\fP\fB);\fP
+
+\fI\fB
+
+\fBpng_uint_32 png_get_chunk_cache_max (png_const_structp \fIpng_ptr\fP\fB);\fP
+
\fI\fB
\fBpng_alloc_size_t png_get_chunk_malloc_max (png_const_structp \fIpng_ptr\fP\fB);\fP
@@ -548,6 +560,16 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.5.4 \fI\fB
+\fBvoid png_set_cHRM_XYZ (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, double \fP\fIred_X\fP\fB, double \fP\fIred_Y\fP\fB, double \fP\fIred_Z\fP\fB, double \fP\fIgreen_X\fP\fB, double \fIgreen_Y,
+
+\fBdouble \fP\fIgreen_Z\fP\fB, double \fP\fIblue_X\fP\fB, double \fP\fIblue_Y\fP\fB, double \fIblue_Z\fP\fB);\fP
+
+\fI\fB
+
+\fBvoid png_set_cHRM_XYZ_fixed (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_fixed_point \fP\fIint_red_X\fP\fB, png_fixed_point \fP\fIint_red_Y\fP\fB, png_fixed_point \fP\fIint_red_Z\fP\fB, png_fixed_point \fP\fIint_green_X\fP\fB, png_fixed_point \fP\fIint_green_Y\fP\fB, png_fixed_point \fP\fIint_green_Z\fP\fB, png_fixed_point \fP\fIint_blue_X\fP\fB, png_fixed_point \fP\fIint_blue_Y\fP\fB, png_fixed_point \fIint_blue_Z\fP\fB);\fP
+
+\fI\fB
+
\fBvoid png_set_chunk_cache_max (png_structp \fP\fIpng_ptr\fP\fB, png_uint_32 \fIuser_chunk_cache_max\fP\fB);\fP
\fI\fB
@@ -955,7 +977,7 @@ Following is a copy of the libpng-manual.txt file that accompanies libpng. .SH LIBPNG.TXT
libpng-manual.txt - A description on how to use and modify libpng
- libpng version 1.5.4 - July 7, 2011
+ libpng version 1.5.9 - February 18, 2012
Updated and distributed by Glenn Randers-Pehrson
<glennrp at users.sourceforge.net>
Copyright (c) 1998-2011 Glenn Randers-Pehrson
@@ -966,7 +988,7 @@ libpng-manual.txt - A description on how to use and modify libpng Based on:
- libpng versions 0.97, January 1998, through 1.5.4 - July 7, 2011
+ libpng versions 0.97, January 1998, through 1.5.9 - February 18, 2012
Updated and distributed by Glenn Randers-Pehrson
Copyright (c) 1998-2011 Glenn Randers-Pehrson
@@ -1062,7 +1084,8 @@ PNG file. At one time, the fields of png_info were intended to be directly accessible to the user. However, this tended to cause problems
with applications using dynamically loaded libraries, and as a result
a set of interface functions for png_info (the png_get_*() and png_set_*()
-functions) was developed.
+functions) was developed, and direct access to the png_info fields was
+deprecated..
The png_struct structure is the object used by the library to decode a
single image. As of 1.5.0 this structure is also not exposed.
@@ -1071,14 +1094,23 @@ Almost all libpng APIs require a pointer to a png_struct as the first argument. Many (in particular the png_set and png_get APIs) also require a pointer
to png_info as the second argument. Some application visible macros
defined in png.h designed for basic data access (reading and writing
-integers in the PNG format) break this rule, but it's almost always safe
-to assume that a (png_struct*) has to be passed to call an API function.
+integers in the PNG format) don't take a png_info pointer, but it's almost
+always safe to assume that a (png_struct*) has to be passed to call an API
+function.
+
+You can have more than one png_info structure associated with an image,
+as illustrated in pngtest.c, one for information valid prior to the
+IDAT chunks and another (called "end_info" below) for things after them.
The png.h header file is an invaluable reference for programming with libpng.
And while I'm on the topic, make sure you include the libpng header file:
#include <png.h>
+and also (as of libpng-1.5.0) the zlib header file, if you need it:
+
+#include <zlib.h>
+
.SS Types
The png.h header file defines a number of integral types used by the
@@ -1092,9 +1124,9 @@ the value by multiplying by 100,000. As of libpng 1.5.0 a convenience macro PNG_FP_1 is defined in png.h along with a type (png_fixed_point)
which is simply (png_int_32).
-All APIs that take (double) arguments also have an matching API that
+All APIs that take (double) arguments also have a matching API that
takes the corresponding fixed point integer arguments. The fixed point
-API has the same name as the floating point one with _fixed appended.
+API has the same name as the floating point one with "_fixed" appended.
The actual range of values permitted in the APIs is frequently less than
the full range of (png_fixed_point) (-21474 to +21474). When APIs require
a non-negative argument the type is recorded as png_uint_32 above. Consult
@@ -1112,6 +1144,10 @@ preprocessing directives of the form: #ifdef PNG_feature_SUPPORTED
declare-function
#endif
+ ...
+ #ifdef PNG_feature_SUPPORTED
+ use-function
+ #endif
The library can be built without support for these APIs, although a
standard build will have all implemented APIs. Application programs
@@ -1120,7 +1156,7 @@ portability. From libpng 1.5.0 the feature macros set during the build of libpng are recorded in the header file "pnglibconf.h" and this file
is always included by png.h.
-If you don't need to change the library configuration from the default skip to
+If you don't need to change the library configuration from the default, skip to
the next section ("Reading").
Notice that some of the makefiles in the 'scripts' directory and (in 1.5.0) all
@@ -1152,24 +1188,25 @@ A variety of methods exist to build libpng. Not all of these support reconfiguration of pnglibconf.h. To reconfigure pnglibconf.h it must either be
rebuilt from scripts/pnglibconf.dfa using awk or it must be edited by hand.
-Hand editing is achieved by copying scripts/pnglibconf.h.prebuilt and changing
-the lines defining the supported features, paying very close attention to
-the 'option' information in scripts/pnglibconf.dfa that describes those
-features and their requirements. This is easy to get wrong.
+Hand editing is achieved by copying scripts/pnglibconf.h.prebuilt to
+pnglibconf.h and changing the lines defining the supported features, paying
+very close attention to the 'option' information in scripts/pnglibconf.dfa
+that describes those features and their requirements. This is easy to get
+wrong.
B. Configuration using DFA_XTRA
Rebuilding from pnglibconf.dfa is easy if a functioning 'awk', or a later
variant such as 'nawk' or 'gawk', is available. The configure build will
automatically find an appropriate awk and build pnglibconf.h.
-scripts/pnglibconf.mak contains a set of make rules for doing the same thing if
-configure is not used, and many of the makefiles in the scripts directory use
-this approach.
+The scripts/pnglibconf.mak file contains a set of make rules for doing the
+same thing if configure is not used, and many of the makefiles in the scripts
+directory use this approach.
-When rebuilding simply write new file containing changed options and set
+When rebuilding simply write a new file containing changed options and set
DFA_XTRA to the name of this file. This causes the build to append the new file
-to the end of scripts/pnglibconf.dfa. pngusr.dfa should contain lines of the
-following forms:
+to the end of scripts/pnglibconf.dfa. The pngusr.dfa file should contain lines
+of the following forms:
everything = off
@@ -1193,12 +1230,16 @@ source code. Most of these values have performance implications for the library but most of them have no visible effect on the API. Some can also be overridden
from the API.
+This method of building a customized pnglibconf.h is illustrated in
+contrib/pngminim/*. See the "$(PNGCONF):" target in the makefile and
+pngusr.dfa in these directories.
+
C. Configuration using PNG_USR_CONFIG
If -DPNG_USR_CONFIG is added to the CFLAGS when pnglibconf.h is built the file
pngusr.h will automatically be included before the options in
-scripts/pnglibconf.dfa are processed. pngusr.h should contain only macro
-definitions turning features on or off or setting settings.
+scripts/pnglibconf.dfa are processed. Your pngusr.h file should contain only
+macro definitions turning features on or off or setting settings.
Apart from the global setting "everything = off" all the options listed above
can be set using macros in pngusr.h:
@@ -1229,6 +1270,9 @@ examine the intermediate file pnglibconf.dfn to find the full set of dependency information for each setting and option. Simply locate the
feature in the file and read the C comments that precede it.
+This method is also illustrated in the contrib/pngminim/* makefiles and
+pngusr.h.
+
.SH III. Reading
We'll now walk you through the possible functions to call when reading
@@ -1512,6 +1556,8 @@ according to the "keep" directive. If a chunk is named in successive instances of png_set_keep_unknown_chunks(), the final instance will
take precedence. The IHDR and IEND chunks should not be named in
chunk_list; if they are, libpng will process them normally anyway.
+If you know that your application will never make use of some particular
+chunks, use PNG_HANDLE_CHUNK_NEVER (or 1) as demonstrated below.
Here is an example of the usage of png_set_keep_unknown_chunks(),
where the private "vpAg" chunk will later be processed by a user chunk
@@ -1608,7 +1654,8 @@ called before the PNG file header had been read and png_set_alpha_mode() did not exist.
If you need to support versions prior to libpng-1.5.4 test the version number
-and follow the procedures described in the appropriate manual page.
+as illustrated below using "PNG_LIBPNG_VER >= 10504" and follow the procedures
+described in the appropriate manual page.
You give libpng the encoding expected by your system expressed as a 'gamma'
value. You can also specify a default encoding for the PNG file in
@@ -1621,7 +1668,7 @@ or you can use the fixed point equivalent: png_set_gamma_fixed(png_ptr, PNG_FP_1*screen_gamma, PNG_FP_1/screen_gamma);
-If you don't know the gamma for you system it is probably 2.2 - a good
+If you don't know the gamma for your system it is probably 2.2 - a good
approximation to the IEC standard for display systems (sRGB). If images are
too contrasty or washed out you got the value wrong - check your system
documentation!
@@ -1650,14 +1697,18 @@ channel. To display these files correctly you need to compose the data onto a suitable background, as described in the PNG specification.
Libpng only supports composing onto a single color (using png_set_background;
-see below.) Otherwise you must do the composition yourself and, in this case,
+see below). Otherwise you must do the composition yourself and, in this case,
you may need to call png_set_alpha_mode:
+#if PNG_LIBPNG_VER >= 10504
png_set_alpha_mode(png_ptr, mode, screen_gamma);
+#else
+ png_set_gamma(png_ptr, screen_gamma, 1.0/screen_gamma);
+#endif
-The screen_gamma value is the same as the argument to png_set_gamma, however how
-it affects the output depends on the mode. png_set_alpha_mode() sets the file
-gamma default to 1/screen_gamma, so normally you don't need to call
+The screen_gamma value is the same as the argument to png_set_gamma; however,
+how it affects the output depends on the mode. png_set_alpha_mode() sets the
+file gamma default to 1/screen_gamma, so normally you don't need to call
png_set_gamma. If you need different defaults call png_set_gamma() before
png_set_alpha_mode() - if you call it after it will override the settings made
by png_set_alpha_mode().
@@ -1684,10 +1735,11 @@ scaled, linear encoded, pre-multiplied component values must be used!
The remaining modes assume you don't need to do any further color correction or
-that if you do your color correction software knows all about alpha (it
+that if you do, your color correction software knows all about alpha (it
probably doesn't!)
- PNG_ALPHA_STANDARD: The data libpng produces is encoded in the standard way
+ PNG_ALPHA_STANDARD: The data libpng produces
+is encoded in the standard way
assumed by most correctly written graphics software.
The gamma encoding will be removed by libpng and the
linear component values will be pre-multiplied by the
@@ -1717,7 +1769,8 @@ dynamic range. To avoid problems, and if your software supports it, use png_set_expand_16() to force all
components to 16 bits.
- PNG_ALPHA_OPTIMIZED: This mode is the same as PNG_ALPHA_STANDARD except that
+ PNG_ALPHA_OPTIMIZED: This mode is the same
+as PNG_ALPHA_STANDARD except that
completely opaque pixels are gamma encoded according to
the screen_gamma value. Pixels with alpha less than 1.0
will still have linear components.
@@ -1737,10 +1790,11 @@ representation of non-opaque pixels are irrelevant. You can also try this format if your software is broken;
it might look better.
- PNG_ALPHA_BROKEN: This is PNG_ALPHA_STANDARD however all component values,
+ PNG_ALPHA_BROKEN: This is PNG_ALPHA_STANDARD;
+however, all component values,
including the alpha channel are gamma encoded. This is
an appropriate format to try if your software, or more
-likely hardware, is totally broken: if it performs
+likely hardware, is totally broken, i.e., if it performs
linear arithmetic directly on gamma encoded values.
In most cases of broken software or hardware the bug in the final display
@@ -1756,14 +1810,14 @@ them, there are three recommended ways of using png_set_alpha_mode(): screen_gamma);
You can do color correction on the result (libpng does not currently
-support color correction internally.) When you handle the alpha channel
+support color correction internally). When you handle the alpha channel
you need to undo the gamma encoding and multiply out the alpha.
png_set_alpha_mode(png_ptr, PNG_ALPHA_STANDARD,
screen_gamma);
png_set_expand_16(png_ptr);
-If you are using the high level interface don't call png_set_expand_16();
+If you are using the high level interface, don't call png_set_expand_16();
instead pass PNG_TRANSFORM_EXPAND_16 to the interface.
With this mode you can't do color correction, but you can do arithmetic,
@@ -1775,7 +1829,7 @@ including composition and scaling, on the data without further processing. You can avoid the expansion to 16-bit components with this mode, but you
lose the ability to scale the image or perform other linear arithmetic.
All you can do is compose the result onto a matching output. Since this
-mode is libpng specific you also need to write your own composition
+mode is libpng-specific you also need to write your own composition
software.
If you don't need, or can't handle, the alpha channel you can call
@@ -1788,12 +1842,12 @@ transparent parts of this image. The background_color is an RGB or grayscale value according to the data format
libpng will produce for you. Because you don't yet know the format of the PNG
-file if you call png_set_background at this point you must arrange for the
+file, if you call png_set_background at this point you must arrange for the
format produced by libpng to always have 8-bit or 16-bit components and then
store the color as an 8-bit or 16-bit color as appropriate. The color contains
separate gray and RGB component values, so you can let libpng produce gray or
RGB output according to the input format, but low bit depth grayscale images
-must always be converted to at least 8-bit format. (Even low low bit depth
+must always be converted to at least 8-bit format. (Even though low bit depth
grayscale images can't have an alpha channel they can have a transparent
color!)
@@ -1932,7 +1986,7 @@ provided by an earlier call to png_set_gamma or png_set_alpha_mode. 2) Prior to libpng-1.5.4 the background color from a bKGd chunk. This
damages the information provided by an earlier call to png_set_background
-resulting in expected behavior. Libpng-1.5.4 no longer does this.
+resulting in unexpected behavior. Libpng-1.5.4 no longer does this.
3) The number of significant bits in each component value. Libpng uses this to
optimize gamma handling by reducing the internal lookup table sizes.
@@ -2070,6 +2124,28 @@ pointer into the info_ptr is returned for any complex types. int_file_gamma - 100,000 times the gamma at which the
file is written
+ png_get_cHRM(png_ptr, info_ptr, &white_x, &white_y, &red_x, &red_y,
+ &green_x, &green_y, &blue_x, &blue_y)
+ png_get_cHRM_XYZ(png_ptr, info_ptr, &red_X, &red_Y, &red_Z, &green_X,
+ &green_Y, &green_Z, &blue_X, &blue_Y, &blue_Z)
+ png_get_cHRM_fixed(png_ptr, info_ptr, &int_white_x, &int_white_y,
+ &int_red_x, &int_red_y, &int_green_x, &int_green_y,
+ &int_blue_x, &int_blue_y)
+ png_get_cHRM_XYZ_fixed(png_ptr, info_ptr, &int_red_X, &int_red_Y,
+ &int_red_Z, &int_green_X, &int_green_Y, &int_green_Z,
+ &int_blue_X, &int_blue_Y, &int_blue_Z)
+
+ {white,red,green,blue}_{x,y}
+ A color space encoding specified using the chromaticities
+ of the end points and the white point. (PNG_INFO_cHRM)
+
+ {red,green,blue}_{X,Y,Z}
+ A color space encoding specified using the encoding end
+ points - the CIE tristimulus specification of the intended
+ color of the red, green and blue channels in the PNG RGB
+ data. The white point is simply the sum of the three end
+ points. (PNG_INFO_cHRM)
+
png_get_sRGB(png_ptr, info_ptr, &srgb_intent);
file_srgb_intent - the rendering intent (PNG_INFO_sRGB)
@@ -2128,7 +2204,8 @@ pointer into the info_ptr is returned for any complex types. png_get_bKGD(png_ptr, info_ptr, &background);
- background - background color (PNG_VALID_bKGD)
+ background - background color (of type
+ png_color_16p) (PNG_VALID_bKGD)
valid 16-bit red, green and blue
values, regardless of color_type
@@ -2165,8 +2242,13 @@ pointer into the info_ptr is returned for any complex types. (empty string for unknown).
Note that the itxt_length, lang, and lang_key
- members of the text_ptr structure only exist
- when the library is built with iTXt chunk support.
+ members of the text_ptr structure only exist when the
+ library is built with iTXt chunk support. Prior to
+ libpng-1.4.0 the library was built by default without
+ iTXt support. Also note that when iTXt is supported,
+ they contain NULL pointers when the "compression"
+ field contains PNG_TEXT_COMPRESSION_NONE or
+ PNG_TEXT_COMPRESSION_zTXt.
num_text - number of comments (same as
num_comments; you can put NULL here
@@ -2191,10 +2273,10 @@ pointer into the info_ptr is returned for any complex types. &unit_type);
offset_x - positive offset from the left edge
- of the screen
+ of the screen (can be negative)
offset_y - positive offset from the top edge
- of the screen
+ of the screen (can be negative)
unit_type - PNG_OFFSET_PIXEL, PNG_OFFSET_MICROMETER
@@ -2226,6 +2308,7 @@ pointer into the info_ptr is returned for any complex types. unit - physical scale units (an integer)
width - width of a pixel in physical scale units
+ (expressed as a string)
height - height of a pixel in physical scale units
(width and height are strings like "2.54")
@@ -2248,6 +2331,12 @@ pointer into the info_ptr is returned for any complex types. chunks were read from the PNG file or inserted with the
png_set_unknown_chunks() function.
+ The value of "location" is a bitwise "or" of
+
+ PNG_HAVE_IHDR (0x01)
+ PNG_HAVE_PLTE (0x02)
+ PNG_AFTER_IDAT (0x08)
+
The data from the pHYs chunk can be retrieved in several convenient
forms:
@@ -2392,7 +2481,7 @@ As of libpng version 1.2.9, png_set_expand_gray_1_2_4_to_8() was added. It expands the sample depth without changing tRNS to alpha.
As of libpng version 1.5.2, png_set_expand_16() was added. It behaves as
-png_set_expand(), however, the resultant channels have 16 bits rather than 8.
+png_set_expand(); however, the resultant channels have 16 bits rather than 8.
Use this when the output color or gray channels are made linear to avoid fairly
severe accuracy loss.
@@ -2403,7 +2492,14 @@ PNG can have files with 16 bits per channel. If you only can handle 8 bits per channel, this will strip the pixels down to 8-bit.
if (bit_depth == 16)
+#if PNG_LIBPNG_VER >= 10504
png_set_scale_16(png_ptr);
+#else
+ png_set_strip_16(png_ptr);
+#endif
+
+(The more accurate "png_set_scale_16()" API became available in libpng version
+1.5.4).
If you need to process the alpha channel on the image separately from the image
data (for example if you convert it to a bitmap mask) it is possible to have
@@ -2581,19 +2677,28 @@ It will return a png_byte that is zero if the image was gray or will be silently converted to grayscale, using the green channel
data for sBIT, regardless of the error_action setting.
-The default values come from the PNG file cHRM chunk if present, otherwise the
+The default values come from the PNG file cHRM chunk if present; otherwise, the
defaults correspond to the ITU-R recommendation 709, and also the sRGB color
space, as recommended in the Charles Poynton's Colour FAQ,
<http://www.poynton.com/>, in section 9:
<http://www.poynton.com/notes/colour_and_gamma/ColorFAQ.html#RTFToC9>
+ Y = 0.2126 * R + 0.7152 * G + 0.0722 * B
+
+Previous versions of this document, 1998 through 2002, recommended a slightly
+different formula:
+
Y = 0.212671 * R + 0.715160 * G + 0.072169 * B
+Libpng uses an integer approximation:
+
+ Y = (6968 * R + 23434 * G + 2366 * B)/32768
+
The calculation is done in a linear colorspace, if the image gamma
can be determined.
-The png_set_background() function has been described already, it tells libpng to
+The png_set_background() function has been described already; it tells libpng to
composite images with alpha or simple transparency against the supplied
background color. For compatibility with versions of libpng earlier than
libpng-1.5.4 it is recommended that you call the function after reading the file
@@ -2603,9 +2708,10 @@ If the PNG file contains a bKGD chunk (PNG_INFO_bKGD valid), you may use this color, or supply another color more suitable for
the current display (e.g., the background color from a web page). You
need to tell libpng how the color is represented, both the format of the
-component values in the color (the number of bits) and the gamme encoding of the
+component values in the color (the number of bits) and the gamma encoding of the
color. The function takes two arguments, background_gamma_mode and need_expand
-to convey this information, however only two combinations are like to be useful:
+to convey this information, however only two combinations are likely to be
+useful:
png_color_16 my_background;
png_color_16p image_background;
@@ -2617,7 +2723,6 @@ to convey this information, however only two combinations are like to be useful: png_set_background(png_ptr, &my_background,
PNG_BACKGROUND_GAMMA_SCREEN, 0/*do not expand*/, 1);
-
The second call was described above - my_background is in the format of the
final, display, output produced by libpng. Because you now know the format of
the PNG it is possible to avoid the need to choose either 8-bit or 16-bit
@@ -2656,9 +2761,9 @@ file has more entries then will fit on your screen, png_set_quantize() will do that. Note that this is a simple match quantization that merely
finds the closest color available. This should work fairly well with
optimized palettes, but fairly badly with linear color cubes. If you
-pass a palette that is larger then maximum_colors, the file will
+pass a palette that is larger than maximum_colors, the file will
reduce the number of colors in the palette so it will fit into
-maximum_colors. If there is a histogram, it will use it to make
+maximum_colors. If there is a histogram, libpng will use it to make
more intelligent choices when reducing the palette. If there is no
histogram, it may not do as good a job.
@@ -2730,7 +2835,7 @@ after all of the other transformations have been processed. Take care with interlaced images if you do the interlace yourself - the width of the row is the
width in 'row_info', not the overall image width.
-If supported libpng provides two information routines that you can use to find
+If supported, libpng provides two information routines that you can use to find
where you are in processing the image:
png_get_current_pass_number(png_structp png_ptr);
@@ -2774,13 +2879,16 @@ of the interlaced image. After setting the transformations, libpng can update your png_info
structure to reflect any transformations you've requested with this
-call. This is most useful to update the info structure's rowbytes
-field so you can use it to allocate your image memory. This function
-will also update your palette with the correct screen_gamma and
-background if these have been given with the calls above.
+call.
png_read_update_info(png_ptr, info_ptr);
+This is most useful to update the info structure's rowbytes
+field so you can use it to allocate your image memory. This function
+will also update your palette with the correct screen_gamma and
+background if these have been given with the calls above. You may
+only call png_read_update_info() once with a particular info_ptr.
+
After you call png_read_update_info(), you can allocate any
memory you need to hold the image. The row data is simply
raw byte data for all forms of images. As the actual allocation
@@ -2789,7 +2897,7 @@ are allocating one large chunk, you will need to build an array of pointers to each row, as it will be needed for some
of the functions below.
-Remember: Before you call png_read_update_info(), the png_get_
+Remember: Before you call png_read_update_info(), the png_get_*()
functions return the values corresponding to the original PNG image.
After you call png_read_update_info the values refer to the image
that libpng will output. Consequently you must call all the png_set_
@@ -2981,7 +3089,7 @@ to load the whole file into memory when it is interlaced. libpng includes a test program, pngvalid, that illustrates reading and
writing of interlaced images. If you can't get interlacing to work in your
-code and don't want to leave it to libpng (the recommended approach) see
+code and don't want to leave it to libpng (the recommended approach), see
how pngvalid.c does it.
.SS Finishing a sequential read
@@ -3594,6 +3702,28 @@ width, height, bit_depth, and color_type must be the same in each call. int_file_gamma - 100,000 times the gamma at which
the image was created
+ png_set_cHRM(png_ptr, info_ptr, white_x, white_y, red_x, red_y,
+ green_x, green_y, blue_x, blue_y)
+ png_set_cHRM_XYZ(png_ptr, info_ptr, red_X, red_Y, red_Z, green_X,
+ green_Y, green_Z, blue_X, blue_Y, blue_Z)
+ png_set_cHRM_fixed(png_ptr, info_ptr, int_white_x, int_white_y,
+ int_red_x, int_red_y, int_green_x, int_green_y,
+ int_blue_x, int_blue_y)
+ png_set_cHRM_XYZ_fixed(png_ptr, info_ptr, int_red_X, int_red_Y,
+ int_red_Z, int_green_X, int_green_Y, int_green_Z,
+ int_blue_X, int_blue_Y, int_blue_Z)
+
+ {white,red,green,blue}_{x,y}
+ A color space encoding specified using the chromaticities
+ of the end points and the white point.
+
+ {red,green,blue}_{X,Y,Z}
+ A color space encoding specified using the encoding end
+ points - the CIE tristimulus specification of the intended
+ color of the red, green and blue channels in the PNG RGB
+ data. The white point is simply the sum of the three end
+ points.
+
png_set_sRGB(png_ptr, info_ptr, srgb_intent);
srgb_intent - the rendering intent
@@ -3654,14 +3784,14 @@ width, height, bit_depth, and color_type must be the same in each call. trans_alpha - array of alpha (transparency)
entries for palette (PNG_INFO_tRNS)
+ num_trans - number of transparent entries
+ (PNG_INFO_tRNS)
+
trans_color - graylevel or color sample values
(in order red, green, blue) of the
single transparent color for
non-paletted images (PNG_INFO_tRNS)
- num_trans - number of transparent entries
- (PNG_INFO_tRNS)
-
png_set_hIST(png_ptr, info_ptr, hist);
hist - histogram of palette (array of
@@ -3674,7 +3804,8 @@ width, height, bit_depth, and color_type must be the same in each call. png_set_bKGD(png_ptr, info_ptr, background);
- background - background color (PNG_VALID_bKGD)
+ background - background color (of type
+ png_color_16p) (PNG_VALID_bKGD)
png_set_text(png_ptr, info_ptr, text_ptr, num_text);
@@ -3698,9 +3829,15 @@ width, height, bit_depth, and color_type must be the same in each call. empty for unknown).
text_ptr[i].translated_keyword - keyword in UTF-8 (NULL
or empty for unknown).
+
Note that the itxt_length, lang, and lang_key
- members of the text_ptr structure only exist
- when the library is built with iTXt chunk support.
+ members of the text_ptr structure only exist when the
+ library is built with iTXt chunk support. Prior to
+ libpng-1.4.0 the library was built by default without
+ iTXt support. Also note that when iTXt is supported,
+ they contain NULL pointers when the "compression"
+ field contains PNG_TEXT_COMPRESSION_NONE or
+ PNG_TEXT_COMPRESSION_zTXt.
num_text - number of comments
@@ -3750,6 +3887,7 @@ width, height, bit_depth, and color_type must be the same in each call. unit - physical scale units (an integer)
width - width of a pixel in physical scale units
+ expressed as a string
height - height of a pixel in physical scale units
(width and height are strings like "2.54")
@@ -3791,7 +3929,7 @@ Because tEXt and zTXt chunks don't have a language field, if you specify PNG_TEXT_COMPRESSION_NONE or PNG_TEXT_COMPRESSION_zTXt
any language code or translated keyword will not be written out.
-Until text gets around 1000 bytes, it is not worth compressing it.
+Until text gets around a few hundred bytes, it is not worth compressing it.
After the text has been written out to the file, the compression type
is set to PNG_TEXT_COMPRESSION_NONE_WR or PNG_TEXT_COMPRESSION_zTXt_WR,
so that it isn't written out again at the end (in case you are calling
@@ -4401,7 +4539,8 @@ However, there are some uncertainties about the status of local variables after a longjmp, so the user may want to be careful about doing anything
after setjmp returns non-zero besides returning itself. Consult your
compiler documentation for more details. For an alternative approach, you
-may wish to use the "cexcept" facility (see http://cexcept.sourceforge.net).
+may wish to use the "cexcept" facility (see http://cexcept.sourceforge.net),
+which is illustrated in pngvalid.c and in contrib/visupng.
.SS Custom chunks
@@ -4419,8 +4558,11 @@ and look at how other chunks were designed, so you can do things similarly. Second, check out the sections of libpng that read and
write chunks. Try to find a chunk that is similar to yours and use
it as a template. More details can be found in the comments inside
-the code. It is best to handle unknown chunks in a generic method,
-via callback functions, instead of by modifying libpng functions.
+the code. It is best to handle private or unknown chunks in a generic method,
+via callback functions, instead of by modifying libpng functions. This
+is illustrated in pngtest.c, which uses a callback function to handle a
+private "vpAg" chunk and the new "sTER" chunk, which are both unknown to
+libpng.
If you wish to write your own transformation for the data, look through
the part of the code that does the transformations, and check out some of
@@ -4448,8 +4590,8 @@ defined, and FAR gets defined to far in pngconf.h, and you should be all set. Everything in the library (except for zlib's structure) is
expecting far data. You must use the typedefs with the p or pp on
the end for pointers (or at least look at them and be careful). Make
-note that the rows of data are defined as png_bytepp, which is an
-unsigned char far * far *.
+note that the rows of data are defined as png_bytepp, which is
+an "unsigned char far * far *".
.SS Configuring for gui/windowing platforms:
@@ -4467,7 +4609,11 @@ or delete an include, this is the place to do it. The includes that are not needed outside libpng are placed in pngpriv.h,
which is only used by the routines inside libpng itself.
The files in libpng proper only include pngpriv.h and png.h, which
-in turn includes pngconf.h.
+%14%in turn includes pngconf.h.
+in turn includes pngconf.h and, as of libpng-1.5.0, pnglibconf.h.
+As of libpng-1.5.0, pngpriv.h also includes three other private header
+files, pngstruct.h, pnginfo.h, and pngdebug.h, which contain material
+that previously appeared in the public headers.
.SS Configuring zlib:
@@ -4509,8 +4655,28 @@ zlib.h for more information on what these mean. window_bits);
png_set_compression_method(png_ptr, method);
+
png_set_compression_buffer_size(png_ptr, size);
+As of libpng version 1.5.4, additional APIs became
+available to set these separately for non-IDAT
+compressed chunks such as zTXt, iTXt, and iCCP:
+
+ #include zlib.h
+ #if PNG_LIBPNG_VER <= 10504
+ png_set_text_compression_level(png_ptr, level);
+
+ png_set_text_compression_mem_level(png_ptr, level);
+
+ png_set_text_compression_strategy(png_ptr,
+ strategy);
+
+ png_set_text_compression_window_bits(png_ptr,
+ window_bits);
+
+ png_set_text_compression_method(png_ptr, method);
+ #endif
+
.SS Controlling row filtering
If you want to control whether libpng uses filtering or not, which
@@ -4616,8 +4782,8 @@ capability, which you'll still have). All the reading and writing specific code are in separate files, so the
linker should only grab the files it needs. However, if you want to
make sure, or if you are building a stand alone library, all the
-reading files start with pngr and all the writing files start with
-pngw. The files that don't match either (like png.c, pngtrans.c, etc.)
+reading files start with "pngr" and all the writing files start with "pngw".
+The files that don't match either (like png.c, pngtrans.c, etc.)
are used for both reading and writing, and always need to be included.
The progressive reader is in pngpread.c
@@ -4736,6 +4902,9 @@ The number libpng_vn is constructed from the major version, minor version with leading zero, and release number with leading zero,
(e.g., libpng_vn for version 1.0.7 is 10007).
+Note that this function does not take a png_ptr, so you can call it
+before you've created one.
+
You can also check which version of png.h you used when compiling your
application:
@@ -4972,10 +5141,9 @@ In png_get_iCCP, the type of "profile" was changed from png_charpp to png_bytepp, and in png_set_iCCP, from png_charp to png_const_bytep.
There are changes of form in png.h, including new and changed macros to
-declare
-parts of the API. Some API functions with arguments that are pointers to
-data not modified within the function have been corrected to declare
-these arguments with PNG_CONST.
+declare parts of the API. Some API functions with arguments that are
+pointers to data not modified within the function have been corrected to
+declare these arguments with PNG_CONST.
Much of the internal use of C macros to control the library build has also
changed and some of this is visible in the exported header files, in
@@ -4995,7 +5163,6 @@ absolutely necessary) interlace an image. libpng 1.5.0 adds an API png_longjmp(png_ptr, value). This API calls
the application-provided png_longjmp_ptr on the internal, but application
-initialized, jmpbuf. It is provided as a convenience to avoid the need
initialized, longjmp buffer. It is provided as a convenience to avoid
the need to use the png_jmpbuf macro, which had the unnecessary side
effect of resetting the internal png_longjmp_ptr value.
@@ -5050,7 +5217,7 @@ Applications can now choose whether to use these macros or to call the corresponding function by defining PNG_USE_READ_MACROS or
PNG_NO_USE_READ_MACROS before including png.h. Notice that this is
only supported from 1.5.0 -defining PNG_NO_USE_READ_MACROS prior to 1.5.0
- will lead to a link failure.
+will lead to a link failure.
Prior to libpng-1.5.4, the zlib compressor used the same set of parameters
when compressing the IDAT data and textual data such as zTXt and iCCP.
@@ -5074,9 +5241,9 @@ increase the limits. B. Changes to the build and configuration of libpng
Details of internal changes to the library code can be found in the CHANGES
-file. These will be of no concern to the vast majority of library users or
-builders, however the few who configure libpng to a non-default feature
-set may need to change how this is done.
+file and in the GIT repository logs. These will be of no concern to the vast
+majority of library users or builders, however the few who configure libpng
+to a non-default feature set may need to change how this is done.
There should be no need for library builders to alter build scripts if
these use the distributed build support - configure or the makefiles -
@@ -5085,14 +5252,14 @@ to build pnglibconf.h where the corresponding makefile does not do so. Building libpng with a non-default configuration has changed completely.
The old method using pngusr.h should still work correctly even though the
-way pngusr.h is used in the build has been changed, however library
+way pngusr.h is used in the build has been changed; however, library
builders will probably want to examine the changes to take advantage of
new capabilities and to simplify their build system.
B.1 Specific changes to library configuration capabilities
The library now supports a complete fixed point implementation and can
-thus be used on systems which have no floating point support or very
+thus be used on systems that have no floating point support or very
limited or slow support. Previously gamma correction, an essential part
of complete PNG support, required reasonably fast floating point.
@@ -5108,14 +5275,14 @@ pnglibconf.h As part of this the mechanism used to choose procedure call standards on
those systems that allow a choice has been changed. At present this only
affects certain Microsoft (DOS, Windows) and IBM (OS/2) operating systems
-running on Intel processors. As before PNGAPI is defined where required
+running on Intel processors. As before, PNGAPI is defined where required
to control the exported API functions; however, two new macros, PNGCBAPI
and PNGCAPI, are used instead for callback functions (PNGCBAPI) and
(PNGCAPI) for functions that must match a C library prototype (currently
only png_longjmp_ptr, which must match the C longjmp function.) The new
approach is documented in pngconf.h
-Despite these changes libpng 1.5.0 only supports the native C function
+Despite these changes, libpng 1.5.0 only supports the native C function
calling standard on those platforms tested so far (__cdecl on Microsoft
Windows). This is because the support requirements for alternative
calling conventions seem to no longer exist. Developers who find it
@@ -5148,8 +5315,10 @@ if the feature is supported or: /*#undef PNG_feature_SUPPORTED*/
if it is not. Library code consistently checks for the 'SUPPORTED' macro.
-It does not, and should not, check for the 'NO' macro which will not
-normally be defined even if the feature is not supported.
+It does not, and libpng applications should not, check for the 'NO' macro
+which will not normally be defined even if the feature is not supported.
+The 'NO' macros are only used internally for setting or not setting the
+corresponding 'SUPPORTED' macros.
Compatibility with the old names is provided as follows:
@@ -5206,10 +5375,10 @@ application built without PNG_USER_CONFIG defined would see the unmodified, default, libpng API and thus would probably fail to link.
These mechanisms still work in the configure build and in any makefile
-build that builds pnglibconf.h although the feature selection macros
+build that builds pnglibconf.h, although the feature selection macros
have changed somewhat as described above. In 1.5.0, however, pngusr.h is
processed only once, when the exported header file pnglibconf.h is built.
-pngconf.h no longer includes pngusr.h, therefore it is ignored after the
+pngconf.h no longer includes pngusr.h, therefore pngusr.h is ignored after the
build of pnglibconf.h and it is never included in an application build.
The rarely used alternative of adding a list of feature macros to the
@@ -5223,7 +5392,7 @@ scripts/pnglibconf.dfa. This requires the program awk. Brian Kernighan and all known later implementations (often called by subtly different
names - nawk and gawk for example) are adequate to build pnglibconf.h.
The Sun Microsystems (now Oracle) program 'awk' is an earlier version
-and does not work, this may also apply to other systems that have a
+and does not work; this may also apply to other systems that have a
functioning awk called 'nawk'.
Configuration options are now documented in scripts/pnglibconf.dfa. This
@@ -5265,8 +5434,8 @@ the libpng bug tracker at We also accept patches built from the tar or zip distributions, and
simple verbal discriptions of bug fixes, reported either to the
-SourceForge bug tracker or to the png-mng-implement at lists.sf.net
-mailing list.
+SourceForge bug tracker, to the png-mng-implement at lists.sf.net
+mailing list, or directly to glennrp.
.SH XIII. Coding style
@@ -5371,6 +5540,9 @@ left parenthesis that follows it: We prefer #ifdef and #ifndef to #if defined() and if !defined()
when there is only one macro being tested.
+We prefer to express integers that are used as bit masks in hex format,
+with an even number of lower-case hex digits (e.g., 0x00, 0xff, 0x0100).
+
We do not use the TAB character for indentation in the C sources.
Lines do not exceed 80 characters.
@@ -5379,13 +5551,13 @@ Other rules can be inferred by inspecting the libpng source. .SH XIV. Y2K Compliance in libpng
-July 7, 2011
+February 18, 2012
Since the PNG Development group is an ad-hoc body, we can't make
an official declaration.
This is your unofficial assurance that libpng from version 0.71 and
-upward through 1.5.4 are Y2K compliant. It is my belief that earlier
+upward through 1.5.9 are Y2K compliant. It is my belief that earlier
versions were also Y2K compliant.
Libpng only has three year fields. One is a 2-byte unsigned integer that
@@ -5581,6 +5753,21 @@ the first widely used release: 1.5.4beta01-08 15 10504 15.so.15.4[.0]
1.5.4rc01 15 10504 15.so.15.4[.0]
1.5.4 15 10504 15.so.15.4[.0]
+ 1.5.5beta01-08 15 10505 15.so.15.5[.0]
+ 1.5.5rc01 15 10505 15.so.15.5[.0]
+ 1.5.5 15 10505 15.so.15.5[.0]
+ 1.5.6beta01-07 15 10506 15.so.15.6[.0]
+ 1.5.6rc01-03 15 10506 15.so.15.6[.0]
+ 1.5.6 15 10506 15.so.15.6[.0]
+ 1.5.7beta01-05 15 10507 15.so.15.7[.0]
+ 1.5.7rc01-03 15 10507 15.so.15.7[.0]
+ 1.5.7 15 10507 15.so.15.7[.0]
+ 1.5.8beta01 15 10508 15.so.15.8[.0]
+ 1.5.8rc01 15 10508 15.so.15.8[.0]
+ 1.5.8 15 10508 15.so.15.8[.0]
+ 1.5.9beta01-02 15 10509 15.so.15.9[.0]
+ 1.5.9rc01 15 10509 15.so.15.9[.0]
+ 1.5.9 15 10509 15.so.15.9[.0]
Henceforth the source version will match the shared-library minor
and patch numbers; the shared-library major version number will be
@@ -5637,7 +5824,7 @@ possible without all of you. Thanks to Frank J. T. Wojcik for helping with the documentation.
-Libpng version 1.5.4 - July 7, 2011:
+Libpng version 1.5.9 - February 18, 2012:
Initially created in 1995 by Guy Eric Schalnat, then of Group 42, Inc.
Currently maintained by Glenn Randers-Pehrson (glennrp at users.sourceforge.net).
@@ -5660,7 +5847,7 @@ this sentence. This code is released under the libpng license.
-libpng versions 1.2.6, August 15, 2004, through 1.5.4, July 7, 2011, are
+libpng versions 1.2.6, August 15, 2004, through 1.5.9, February 18, 2012, are
Copyright (c) 2004,2006-2007 Glenn Randers-Pehrson, and are
distributed according to the same disclaimer and license as libpng-1.2.5
with the following individual added to the list of Contributing Authors
@@ -5759,7 +5946,7 @@ certification mark of the Open Source Initiative. Glenn Randers-Pehrson
glennrp at users.sourceforge.net
-July 7, 2011
+February 18, 2012
.\" end of man page
diff --git a/plugins/FreeImage/Source/LibPNG/libpngpf.3 b/plugins/FreeImage/Source/LibPNG/libpngpf.3 index 744a119d65..ef54f7b5b0 100644 --- a/plugins/FreeImage/Source/LibPNG/libpngpf.3 +++ b/plugins/FreeImage/Source/LibPNG/libpngpf.3 @@ -1,6 +1,6 @@ -.TH LIBPNGPF 3 "July 7, 2011"
+.TH LIBPNGPF 3 "February 18, 2012"
.SH NAME
-libpng \- Portable Network Graphics (PNG) Reference Library 1.5.4
+libpng \- Portable Network Graphics (PNG) Reference Library 1.5.9
(private functions)
.SH SYNOPSIS
\fB#include \fI"pngpriv.h"
diff --git a/plugins/FreeImage/Source/LibPNG/png.5 b/plugins/FreeImage/Source/LibPNG/png.5 index 511e778925..6df917d4ae 100644 --- a/plugins/FreeImage/Source/LibPNG/png.5 +++ b/plugins/FreeImage/Source/LibPNG/png.5 @@ -1,4 +1,4 @@ -.TH PNG 5 "July 7, 2011"
+.TH PNG 5 "February 18, 2012"
.SH NAME
png \- Portable Network Graphics (PNG) format
.SH DESCRIPTION
diff --git a/plugins/FreeImage/Source/LibPNG/png.c b/plugins/FreeImage/Source/LibPNG/png.c index a57175da1d..5a490b2d92 100644 --- a/plugins/FreeImage/Source/LibPNG/png.c +++ b/plugins/FreeImage/Source/LibPNG/png.c @@ -1,7 +1,7 @@ /* png.c - location for general purpose libpng functions
*
- * Last changed in libpng 1.5.4 [July 7, 2011]
+ * Last changed in libpng 1.5.7 [December 15, 2011]
* Copyright (c) 1998-2011 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -14,7 +14,7 @@ #include "pngpriv.h"
/* Generate a compiler error if there is an old png.h in the search path. */
-typedef png_libpng_version_1_5_4 Your_png_h_is_not_version_1_5_4;
+typedef png_libpng_version_1_5_9 Your_png_h_is_not_version_1_5_9;
/* Tells libpng that we have already handled the first "num_bytes" bytes
* of the PNG file signature. If the PNG data is embedded into another
@@ -43,7 +43,7 @@ png_set_sig_bytes(png_structp png_ptr, int num_bytes) * can simply check the remaining bytes for extra assurance. Returns
* an integer less than, equal to, or greater than zero if sig is found,
* respectively, to be less than, to match, or be greater than the correct
- * PNG signature (this is the same behaviour as strcmp, memcmp, etc).
+ * PNG signature (this is the same behavior as strcmp, memcmp, etc).
*/
int PNGAPI
png_sig_cmp(png_const_bytep sig, png_size_t start, png_size_t num_to_check)
@@ -107,7 +107,8 @@ png_zfree(voidpf png_ptr, voidpf ptr) void /* PRIVATE */
png_reset_crc(png_structp png_ptr)
{
- png_ptr->crc = crc32(0, Z_NULL, 0);
+ /* The cast is safe because the crc is a 32 bit value. */
+ png_ptr->crc = (png_uint_32)crc32(0, Z_NULL, 0);
}
/* Calculate the CRC over a section of data. We can only pass as
@@ -120,21 +121,48 @@ png_calculate_crc(png_structp png_ptr, png_const_bytep ptr, png_size_t length) {
int need_crc = 1;
- if (png_ptr->chunk_name[0] & 0x20) /* ancillary */
+ if (PNG_CHUNK_ANCILLIARY(png_ptr->chunk_name))
{
if ((png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_MASK) ==
(PNG_FLAG_CRC_ANCILLARY_USE | PNG_FLAG_CRC_ANCILLARY_NOWARN))
need_crc = 0;
}
- else /* critical */
+ else /* critical */
{
if (png_ptr->flags & PNG_FLAG_CRC_CRITICAL_IGNORE)
need_crc = 0;
}
- if (need_crc)
- png_ptr->crc = crc32(png_ptr->crc, ptr, (uInt)length);
+ /* 'uLong' is defined as unsigned long, this means that on some systems it is
+ * a 64 bit value. crc32, however, returns 32 bits so the following cast is
+ * safe. 'uInt' may be no more than 16 bits, so it is necessary to perform a
+ * loop here.
+ */
+ if (need_crc && length > 0)
+ {
+ uLong crc = png_ptr->crc; /* Should never issue a warning */
+
+ do
+ {
+ uInt safeLength = (uInt)length;
+ if (safeLength == 0)
+ safeLength = (uInt)-1; /* evil, but safe */
+
+ crc = crc32(crc, ptr, safeLength);
+
+ /* The following should never issue compiler warnings, if they do the
+ * target system has characteristics that will probably violate other
+ * assumptions within the libpng code.
+ */
+ ptr += safeLength;
+ length -= safeLength;
+ }
+ while (length > 0);
+
+ /* And the following is always safe because the crc is only 32 bits. */
+ png_ptr->crc = (png_uint_32)crc;
+ }
}
/* Check a user supplied version number, called from both read and write
@@ -542,8 +570,8 @@ png_get_io_ptr(png_structp png_ptr) /* Initialize the default input/output functions for the PNG file. If you
* use your own read or write routines, you can call either png_set_read_fn()
* or png_set_write_fn() instead of png_init_io(). If you have defined
- * PNG_NO_STDIO, you must use a function of your own because "FILE *" isn't
- * necessarily available.
+ * PNG_NO_STDIO or otherwise disabled PNG_STDIO_SUPPORTED, you must use a
+ * function of your own because "FILE *" isn't necessarily available.
*/
void PNGAPI
png_init_io(png_structp png_ptr, png_FILE_p fp)
@@ -571,9 +599,19 @@ png_convert_to_rfc1123(png_structp png_ptr, png_const_timep ptime) if (png_ptr == NULL)
return (NULL);
+ if (ptime->year > 9999 /* RFC1123 limitation */ ||
+ ptime->month == 0 || ptime->month > 12 ||
+ ptime->day == 0 || ptime->day > 31 ||
+ ptime->hour > 23 || ptime->minute > 59 ||
+ ptime->second > 60)
+ {
+ png_warning(png_ptr, "Ignoring invalid time value");
+ return (NULL);
+ }
+
{
size_t pos = 0;
- char number_buf[5]; /* enough for a four digit year */
+ char number_buf[5]; /* enough for a four-digit year */
# define APPEND_STRING(string)\
pos = png_safecat(png_ptr->time_buffer, sizeof png_ptr->time_buffer,\
@@ -584,17 +622,17 @@ png_convert_to_rfc1123(png_structp png_ptr, png_const_timep ptime) if (pos < (sizeof png_ptr->time_buffer)-1)\
png_ptr->time_buffer[pos++] = (ch)
- APPEND_NUMBER(PNG_NUMBER_FORMAT_u, (unsigned)ptime->day % 32);
+ APPEND_NUMBER(PNG_NUMBER_FORMAT_u, (unsigned)ptime->day);
APPEND(' ');
- APPEND_STRING(short_months[(ptime->month - 1) % 12]);
+ APPEND_STRING(short_months[(ptime->month - 1)]);
APPEND(' ');
APPEND_NUMBER(PNG_NUMBER_FORMAT_u, ptime->year);
APPEND(' ');
- APPEND_NUMBER(PNG_NUMBER_FORMAT_02u, (unsigned)ptime->hour % 24);
+ APPEND_NUMBER(PNG_NUMBER_FORMAT_02u, (unsigned)ptime->hour);
APPEND(':');
- APPEND_NUMBER(PNG_NUMBER_FORMAT_02u, (unsigned)ptime->minute % 60);
+ APPEND_NUMBER(PNG_NUMBER_FORMAT_02u, (unsigned)ptime->minute);
APPEND(':');
- APPEND_NUMBER(PNG_NUMBER_FORMAT_02u, (unsigned)ptime->second % 61);
+ APPEND_NUMBER(PNG_NUMBER_FORMAT_02u, (unsigned)ptime->second);
APPEND_STRING(" +0000"); /* This reliably terminates the buffer */
# undef APPEND
@@ -617,13 +655,13 @@ png_get_copyright(png_const_structp png_ptr) #else
# ifdef __STDC__
return PNG_STRING_NEWLINE \
- "libpng version 1.5.4 - July 7, 2011" PNG_STRING_NEWLINE \
+ "libpng version 1.5.9 - February 18, 2012" PNG_STRING_NEWLINE \
"Copyright (c) 1998-2011 Glenn Randers-Pehrson" PNG_STRING_NEWLINE \
"Copyright (c) 1996-1997 Andreas Dilger" PNG_STRING_NEWLINE \
"Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc." \
PNG_STRING_NEWLINE;
# else
- return "libpng version 1.5.4 - July 7, 2011\
+ return "libpng version 1.5.9 - February 18, 2012\
Copyright (c) 1998-2011 Glenn Randers-Pehrson\
Copyright (c) 1996-1997 Andreas Dilger\
Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.";
@@ -670,25 +708,43 @@ png_get_header_version(png_const_structp png_ptr) #endif
}
-#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
-# ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
+#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
int PNGAPI
png_handle_as_unknown(png_structp png_ptr, png_const_bytep chunk_name)
{
/* Check chunk_name and return "keep" value if it's on the list, else 0 */
- int i;
- png_bytep p;
- if (png_ptr == NULL || chunk_name == NULL || png_ptr->num_chunk_list<=0)
- return 0;
+ png_const_bytep p, p_end;
+
+ if (png_ptr == NULL || chunk_name == NULL || png_ptr->num_chunk_list <= 0)
+ return PNG_HANDLE_CHUNK_AS_DEFAULT;
+
+ p_end = png_ptr->chunk_list;
+ p = p_end + png_ptr->num_chunk_list*5; /* beyond end */
- p = png_ptr->chunk_list + png_ptr->num_chunk_list*5 - 5;
- for (i = png_ptr->num_chunk_list; i; i--, p -= 5)
+ /* The code is the fifth byte after each four byte string. Historically this
+ * code was always searched from the end of the list, so it should continue
+ * to do so in case there are duplicated entries.
+ */
+ do /* num_chunk_list > 0, so at least one */
+ {
+ p -= 5;
if (!png_memcmp(chunk_name, p, 4))
- return ((int)*(p + 4));
- return 0;
+ return p[4];
+ }
+ while (p > p_end);
+
+ return PNG_HANDLE_CHUNK_AS_DEFAULT;
}
-# endif
-#endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */
+
+int /* PRIVATE */
+png_chunk_unknown_handling(png_structp png_ptr, png_uint_32 chunk_name)
+{
+ png_byte chunk_string[5];
+
+ PNG_CSTRING_FROM_CHUNK(chunk_string, chunk_name);
+ return png_handle_as_unknown(png_ptr, chunk_string);
+}
+#endif
#ifdef PNG_READ_SUPPORTED
/* This function, added to libpng-1.0.6g, is untested. */
@@ -713,18 +769,9 @@ png_access_version_number(void) #if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
-# ifdef PNG_SIZE_T
-/* Added at libpng version 1.2.6 */
- PNG_EXTERN png_size_t PNGAPI png_convert_size PNGARG((size_t size));
-png_size_t PNGAPI
-png_convert_size(size_t size)
-{
- if (size > (png_size_t)-1)
- PNG_ABORT(); /* We haven't got access to png_ptr, so no png_error() */
-
- return ((png_size_t)size);
-}
-# endif /* PNG_SIZE_T */
+/* png_convert_size: a PNGAPI but no longer in png.h, so deleted
+ * at libpng 1.5.5!
+ */
/* Added at libpng version 1.2.34 and 1.4.0 (moved from pngset.c) */
# ifdef PNG_CHECK_cHRM_SUPPORTED
@@ -798,6 +845,326 @@ png_check_cHRM_fixed(png_structp png_ptr, }
# endif /* PNG_CHECK_cHRM_SUPPORTED */
+#ifdef PNG_cHRM_SUPPORTED
+/* Added at libpng-1.5.5 to support read and write of true CIEXYZ values for
+ * cHRM, as opposed to using chromaticities. These internal APIs return
+ * non-zero on a parameter error. The X, Y and Z values are required to be
+ * positive and less than 1.0.
+ */
+int png_xy_from_XYZ(png_xy *xy, png_XYZ XYZ)
+{
+ png_int_32 d, dwhite, whiteX, whiteY;
+
+ d = XYZ.redX + XYZ.redY + XYZ.redZ;
+ if (!png_muldiv(&xy->redx, XYZ.redX, PNG_FP_1, d)) return 1;
+ if (!png_muldiv(&xy->redy, XYZ.redY, PNG_FP_1, d)) return 1;
+ dwhite = d;
+ whiteX = XYZ.redX;
+ whiteY = XYZ.redY;
+
+ d = XYZ.greenX + XYZ.greenY + XYZ.greenZ;
+ if (!png_muldiv(&xy->greenx, XYZ.greenX, PNG_FP_1, d)) return 1;
+ if (!png_muldiv(&xy->greeny, XYZ.greenY, PNG_FP_1, d)) return 1;
+ dwhite += d;
+ whiteX += XYZ.greenX;
+ whiteY += XYZ.greenY;
+
+ d = XYZ.blueX + XYZ.blueY + XYZ.blueZ;
+ if (!png_muldiv(&xy->bluex, XYZ.blueX, PNG_FP_1, d)) return 1;
+ if (!png_muldiv(&xy->bluey, XYZ.blueY, PNG_FP_1, d)) return 1;
+ dwhite += d;
+ whiteX += XYZ.blueX;
+ whiteY += XYZ.blueY;
+
+ /* The reference white is simply the same of the end-point (X,Y,Z) vectors,
+ * thus:
+ */
+ if (!png_muldiv(&xy->whitex, whiteX, PNG_FP_1, dwhite)) return 1;
+ if (!png_muldiv(&xy->whitey, whiteY, PNG_FP_1, dwhite)) return 1;
+
+ return 0;
+}
+
+int png_XYZ_from_xy(png_XYZ *XYZ, png_xy xy)
+{
+ png_fixed_point red_inverse, green_inverse, blue_scale;
+ png_fixed_point left, right, denominator;
+
+ /* Check xy and, implicitly, z. Note that wide gamut color spaces typically
+ * have end points with 0 tristimulus values (these are impossible end
+ * points, but they are used to cover the possible colors.)
+ */
+ if (xy.redx < 0 || xy.redx > PNG_FP_1) return 1;
+ if (xy.redy < 0 || xy.redy > PNG_FP_1-xy.redx) return 1;
+ if (xy.greenx < 0 || xy.greenx > PNG_FP_1) return 1;
+ if (xy.greeny < 0 || xy.greeny > PNG_FP_1-xy.greenx) return 1;
+ if (xy.bluex < 0 || xy.bluex > PNG_FP_1) return 1;
+ if (xy.bluey < 0 || xy.bluey > PNG_FP_1-xy.bluex) return 1;
+ if (xy.whitex < 0 || xy.whitex > PNG_FP_1) return 1;
+ if (xy.whitey < 0 || xy.whitey > PNG_FP_1-xy.whitex) return 1;
+
+ /* The reverse calculation is more difficult because the original tristimulus
+ * value had 9 independent values (red,green,blue)x(X,Y,Z) however only 8
+ * derived values were recorded in the cHRM chunk;
+ * (red,green,blue,white)x(x,y). This loses one degree of freedom and
+ * therefore an arbitrary ninth value has to be introduced to undo the
+ * original transformations.
+ *
+ * Think of the original end-points as points in (X,Y,Z) space. The
+ * chromaticity values (c) have the property:
+ *
+ * C
+ * c = ---------
+ * X + Y + Z
+ *
+ * For each c (x,y,z) from the corresponding original C (X,Y,Z). Thus the
+ * three chromaticity values (x,y,z) for each end-point obey the
+ * relationship:
+ *
+ * x + y + z = 1
+ *
+ * This describes the plane in (X,Y,Z) space that intersects each axis at the
+ * value 1.0; call this the chromaticity plane. Thus the chromaticity
+ * calculation has scaled each end-point so that it is on the x+y+z=1 plane
+ * and chromaticity is the intersection of the vector from the origin to the
+ * (X,Y,Z) value with the chromaticity plane.
+ *
+ * To fully invert the chromaticity calculation we would need the three
+ * end-point scale factors, (red-scale, green-scale, blue-scale), but these
+ * were not recorded. Instead we calculated the reference white (X,Y,Z) and
+ * recorded the chromaticity of this. The reference white (X,Y,Z) would have
+ * given all three of the scale factors since:
+ *
+ * color-C = color-c * color-scale
+ * white-C = red-C + green-C + blue-C
+ * = red-c*red-scale + green-c*green-scale + blue-c*blue-scale
+ *
+ * But cHRM records only white-x and white-y, so we have lost the white scale
+ * factor:
+ *
+ * white-C = white-c*white-scale
+ *
+ * To handle this the inverse transformation makes an arbitrary assumption
+ * about white-scale:
+ *
+ * Assume: white-Y = 1.0
+ * Hence: white-scale = 1/white-y
+ * Or: red-Y + green-Y + blue-Y = 1.0
+ *
+ * Notice the last statement of the assumption gives an equation in three of
+ * the nine values we want to calculate. 8 more equations come from the
+ * above routine as summarised at the top above (the chromaticity
+ * calculation):
+ *
+ * Given: color-x = color-X / (color-X + color-Y + color-Z)
+ * Hence: (color-x - 1)*color-X + color.x*color-Y + color.x*color-Z = 0
+ *
+ * This is 9 simultaneous equations in the 9 variables "color-C" and can be
+ * solved by Cramer's rule. Cramer's rule requires calculating 10 9x9 matrix
+ * determinants, however this is not as bad as it seems because only 28 of
+ * the total of 90 terms in the various matrices are non-zero. Nevertheless
+ * Cramer's rule is notoriously numerically unstable because the determinant
+ * calculation involves the difference of large, but similar, numbers. It is
+ * difficult to be sure that the calculation is stable for real world values
+ * and it is certain that it becomes unstable where the end points are close
+ * together.
+ *
+ * So this code uses the perhaps slighly less optimal but more understandable
+ * and totally obvious approach of calculating color-scale.
+ *
+ * This algorithm depends on the precision in white-scale and that is
+ * (1/white-y), so we can immediately see that as white-y approaches 0 the
+ * accuracy inherent in the cHRM chunk drops off substantially.
+ *
+ * libpng arithmetic: a simple invertion of the above equations
+ * ------------------------------------------------------------
+ *
+ * white_scale = 1/white-y
+ * white-X = white-x * white-scale
+ * white-Y = 1.0
+ * white-Z = (1 - white-x - white-y) * white_scale
+ *
+ * white-C = red-C + green-C + blue-C
+ * = red-c*red-scale + green-c*green-scale + blue-c*blue-scale
+ *
+ * This gives us three equations in (red-scale,green-scale,blue-scale) where
+ * all the coefficients are now known:
+ *
+ * red-x*red-scale + green-x*green-scale + blue-x*blue-scale
+ * = white-x/white-y
+ * red-y*red-scale + green-y*green-scale + blue-y*blue-scale = 1
+ * red-z*red-scale + green-z*green-scale + blue-z*blue-scale
+ * = (1 - white-x - white-y)/white-y
+ *
+ * In the last equation color-z is (1 - color-x - color-y) so we can add all
+ * three equations together to get an alternative third:
+ *
+ * red-scale + green-scale + blue-scale = 1/white-y = white-scale
+ *
+ * So now we have a Cramer's rule solution where the determinants are just
+ * 3x3 - far more tractible. Unfortunately 3x3 determinants still involve
+ * multiplication of three coefficients so we can't guarantee to avoid
+ * overflow in the libpng fixed point representation. Using Cramer's rule in
+ * floating point is probably a good choice here, but it's not an option for
+ * fixed point. Instead proceed to simplify the first two equations by
+ * eliminating what is likely to be the largest value, blue-scale:
+ *
+ * blue-scale = white-scale - red-scale - green-scale
+ *
+ * Hence:
+ *
+ * (red-x - blue-x)*red-scale + (green-x - blue-x)*green-scale =
+ * (white-x - blue-x)*white-scale
+ *
+ * (red-y - blue-y)*red-scale + (green-y - blue-y)*green-scale =
+ * 1 - blue-y*white-scale
+ *
+ * And now we can trivially solve for (red-scale,green-scale):
+ *
+ * green-scale =
+ * (white-x - blue-x)*white-scale - (red-x - blue-x)*red-scale
+ * -----------------------------------------------------------
+ * green-x - blue-x
+ *
+ * red-scale =
+ * 1 - blue-y*white-scale - (green-y - blue-y) * green-scale
+ * ---------------------------------------------------------
+ * red-y - blue-y
+ *
+ * Hence:
+ *
+ * red-scale =
+ * ( (green-x - blue-x) * (white-y - blue-y) -
+ * (green-y - blue-y) * (white-x - blue-x) ) / white-y
+ * -------------------------------------------------------------------------
+ * (green-x - blue-x)*(red-y - blue-y)-(green-y - blue-y)*(red-x - blue-x)
+ *
+ * green-scale =
+ * ( (red-y - blue-y) * (white-x - blue-x) -
+ * (red-x - blue-x) * (white-y - blue-y) ) / white-y
+ * -------------------------------------------------------------------------
+ * (green-x - blue-x)*(red-y - blue-y)-(green-y - blue-y)*(red-x - blue-x)
+ *
+ * Accuracy:
+ * The input values have 5 decimal digits of accuracy. The values are all in
+ * the range 0 < value < 1, so simple products are in the same range but may
+ * need up to 10 decimal digits to preserve the original precision and avoid
+ * underflow. Because we are using a 32-bit signed representation we cannot
+ * match this; the best is a little over 9 decimal digits, less than 10.
+ *
+ * The approach used here is to preserve the maximum precision within the
+ * signed representation. Because the red-scale calculation above uses the
+ * difference between two products of values that must be in the range -1..+1
+ * it is sufficient to divide the product by 7; ceil(100,000/32767*2). The
+ * factor is irrelevant in the calculation because it is applied to both
+ * numerator and denominator.
+ *
+ * Note that the values of the differences of the products of the
+ * chromaticities in the above equations tend to be small, for example for
+ * the sRGB chromaticities they are:
+ *
+ * red numerator: -0.04751
+ * green numerator: -0.08788
+ * denominator: -0.2241 (without white-y multiplication)
+ *
+ * The resultant Y coefficients from the chromaticities of some widely used
+ * color space definitions are (to 15 decimal places):
+ *
+ * sRGB
+ * 0.212639005871510 0.715168678767756 0.072192315360734
+ * Kodak ProPhoto
+ * 0.288071128229293 0.711843217810102 0.000085653960605
+ * Adobe RGB
+ * 0.297344975250536 0.627363566255466 0.075291458493998
+ * Adobe Wide Gamut RGB
+ * 0.258728243040113 0.724682314948566 0.016589442011321
+ */
+ /* By the argument, above overflow should be impossible here. The return
+ * value of 2 indicates an internal error to the caller.
+ */
+ if (!png_muldiv(&left, xy.greenx-xy.bluex, xy.redy - xy.bluey, 7)) return 2;
+ if (!png_muldiv(&right, xy.greeny-xy.bluey, xy.redx - xy.bluex, 7)) return 2;
+ denominator = left - right;
+
+ /* Now find the red numerator. */
+ if (!png_muldiv(&left, xy.greenx-xy.bluex, xy.whitey-xy.bluey, 7)) return 2;
+ if (!png_muldiv(&right, xy.greeny-xy.bluey, xy.whitex-xy.bluex, 7)) return 2;
+
+ /* Overflow is possible here and it indicates an extreme set of PNG cHRM
+ * chunk values. This calculation actually returns the reciprocal of the
+ * scale value because this allows us to delay the multiplication of white-y
+ * into the denominator, which tends to produce a small number.
+ */
+ if (!png_muldiv(&red_inverse, xy.whitey, denominator, left-right) ||
+ red_inverse <= xy.whitey /* r+g+b scales = white scale */)
+ return 1;
+
+ /* Similarly for green_inverse: */
+ if (!png_muldiv(&left, xy.redy-xy.bluey, xy.whitex-xy.bluex, 7)) return 2;
+ if (!png_muldiv(&right, xy.redx-xy.bluex, xy.whitey-xy.bluey, 7)) return 2;
+ if (!png_muldiv(&green_inverse, xy.whitey, denominator, left-right) ||
+ green_inverse <= xy.whitey)
+ return 1;
+
+ /* And the blue scale, the checks above guarantee this can't overflow but it
+ * can still produce 0 for extreme cHRM values.
+ */
+ blue_scale = png_reciprocal(xy.whitey) - png_reciprocal(red_inverse) -
+ png_reciprocal(green_inverse);
+ if (blue_scale <= 0) return 1;
+
+
+ /* And fill in the png_XYZ: */
+ if (!png_muldiv(&XYZ->redX, xy.redx, PNG_FP_1, red_inverse)) return 1;
+ if (!png_muldiv(&XYZ->redY, xy.redy, PNG_FP_1, red_inverse)) return 1;
+ if (!png_muldiv(&XYZ->redZ, PNG_FP_1 - xy.redx - xy.redy, PNG_FP_1,
+ red_inverse))
+ return 1;
+
+ if (!png_muldiv(&XYZ->greenX, xy.greenx, PNG_FP_1, green_inverse)) return 1;
+ if (!png_muldiv(&XYZ->greenY, xy.greeny, PNG_FP_1, green_inverse)) return 1;
+ if (!png_muldiv(&XYZ->greenZ, PNG_FP_1 - xy.greenx - xy.greeny, PNG_FP_1,
+ green_inverse))
+ return 1;
+
+ if (!png_muldiv(&XYZ->blueX, xy.bluex, blue_scale, PNG_FP_1)) return 1;
+ if (!png_muldiv(&XYZ->blueY, xy.bluey, blue_scale, PNG_FP_1)) return 1;
+ if (!png_muldiv(&XYZ->blueZ, PNG_FP_1 - xy.bluex - xy.bluey, blue_scale,
+ PNG_FP_1))
+ return 1;
+
+ return 0; /*success*/
+}
+
+int png_XYZ_from_xy_checked(png_structp png_ptr, png_XYZ *XYZ, png_xy xy)
+{
+ switch (png_XYZ_from_xy(XYZ, xy))
+ {
+ case 0: /* success */
+ return 1;
+
+ case 1:
+ /* The chunk may be technically valid, but we got png_fixed_point
+ * overflow while trying to get XYZ values out of it. This is
+ * entirely benign - the cHRM chunk is pretty extreme.
+ */
+ png_warning(png_ptr,
+ "extreme cHRM chunk cannot be converted to tristimulus values");
+ break;
+
+ default:
+ /* libpng is broken; this should be a warning but if it happens we
+ * want error reports so for the moment it is an error.
+ */
+ png_error(png_ptr, "internal error in png_XYZ_from_xy");
+ break;
+ }
+
+ /* ERROR RETURN */
+ return 0;
+}
+#endif
+
void /* PRIVATE */
png_check_IHDR(png_structp png_ptr,
png_uint_32 width, png_uint_32 height, int bit_depth,
@@ -1383,18 +1750,30 @@ png_ascii_from_fp(png_structp png_ptr, png_charp ascii, png_size_t size, size -= cdigits;
*ascii++ = 69, --size; /* 'E': PLUS 1 TOTAL 2+precision */
- if (exp_b10 < 0)
+
+ /* The following use of an unsigned temporary avoids ambiguities in
+ * the signed arithmetic on exp_b10 and permits GCC at least to do
+ * better optimization.
+ */
{
- *ascii++ = 45, --size; /* '-': PLUS 1 TOTAL 3+precision */
- exp_b10 = -exp_b10;
- }
+ unsigned int uexp_b10;
- cdigits = 0;
+ if (exp_b10 < 0)
+ {
+ *ascii++ = 45, --size; /* '-': PLUS 1 TOTAL 3+precision */
+ uexp_b10 = -exp_b10;
+ }
- while (exp_b10 > 0)
- {
- exponent[cdigits++] = (char)(48 + exp_b10 % 10);
- exp_b10 /= 10;
+ else
+ uexp_b10 = exp_b10;
+
+ cdigits = 0;
+
+ while (uexp_b10 > 0)
+ {
+ exponent[cdigits++] = (char)(48 + uexp_b10 % 10);
+ uexp_b10 /= 10;
+ }
}
/* Need another size check here for the exponent digits, so
@@ -1452,7 +1831,7 @@ png_ascii_from_fixed(png_structp png_ptr, png_charp ascii, png_size_t size, else
num = fp;
- if (num <= 0x80000000U) /* else overflowed */
+ if (num <= 0x80000000) /* else overflowed */
{
unsigned int ndigits = 0, first = 16 /* flag value */;
char digits[10];
@@ -1795,9 +2174,9 @@ png_64bit_product (long v1, long v2, unsigned long *hi_product, static png_uint_32
png_8bit_l2[128] =
{
-# if PNG_DO_BC
+# ifdef PNG_DO_BC
for (i=128;i<256;++i) { .5 - l(i/255)/l(2)*65536*65536; }
-# endif
+# else
4270715492U, 4222494797U, 4174646467U, 4127164793U, 4080044201U, 4033279239U,
3986864580U, 3940795015U, 3895065449U, 3849670902U, 3804606499U, 3759867474U,
3715449162U, 3671346997U, 3627556511U, 3584073329U, 3540893168U, 3498011834U,
@@ -1820,6 +2199,8 @@ png_8bit_l2[128] = 324227938U, 298676034U, 273229066U, 247886176U, 222646516U, 197509248U,
172473545U, 147538590U, 122703574U, 97967701U, 73330182U, 48790236U,
24347096U, 0U
+# endif
+
#if 0
/* The following are the values for 16-bit tables - these work fine for the
* 8-bit conversions but produce very slightly larger errors in the 16-bit
@@ -1954,7 +2335,7 @@ png_log16bit(png_uint_32 x) * integer bits (the top 4) simply determine a shift.
*
* The worst case is the 16-bit distinction between 65535 and 65534, this
- * requires perhaps spurious accuracty in the decoding of the logarithm to
+ * requires perhaps spurious accuracy in the decoding of the logarithm to
* distinguish log2(65535/65534.5) - 10^-5 or 17 bits. There is little chance
* of getting this accuracy in practice.
*
@@ -1965,17 +2346,18 @@ png_log16bit(png_uint_32 x) static png_uint_32
png_32bit_exp[16] =
{
-# if PNG_DO_BC
+# ifdef PNG_DO_BC
for (i=0;i<16;++i) { .5 + e(-i/16*l(2))*2^32; }
-# endif
+# else
/* NOTE: the first entry is deliberately set to the maximum 32-bit value. */
4294967295U, 4112874773U, 3938502376U, 3771522796U, 3611622603U, 3458501653U,
3311872529U, 3171459999U, 3037000500U, 2908241642U, 2784941738U, 2666869345U,
2553802834U, 2445529972U, 2341847524U, 2242560872U
+# endif
};
/* Adjustment table; provided to explain the numbers in the code below. */
-#if PNG_DO_BC
+#ifdef PNG_DO_BC
for (i=11;i>=0;--i){ print i, " ", (1 - e(-(2^i)/65536*l(2))) * 2^(32-i), "\n"}
11 44937.64284865548751208448
10 45180.98734845585101160448
@@ -2138,7 +2520,7 @@ png_gamma_significant(png_fixed_point gamma_val) }
/* Internal function to build a single 16-bit table - the table consists of
- * 'num' 256 entry subtables, where 'num' is determined by 'shift' - the amount
+ * 'num' 256-entry subtables, where 'num' is determined by 'shift' - the amount
* to shift the input values right (or 16-number_of_signifiant_bits).
*
* The caller is responsible for ensuring that the table gets cleaned up on
@@ -2225,9 +2607,9 @@ png_build_16to8_table(png_structp png_ptr, png_uint_16pp *ptable, png_uint_16pp table = *ptable =
(png_uint_16pp)png_calloc(png_ptr, num * png_sizeof(png_uint_16p));
- /* 'num' is the number of tables and also the number of low bits of low
- * bits of the input 16-bit value used to select a table. Each table is
- * itself index by the high 8 bits of the value.
+ /* 'num' is the number of tables and also the number of low bits of the
+ * input 16-bit value used to select a table. Each table is itself indexed
+ * by the high 8 bits of the value.
*/
for (i = 0; i < num; i++)
table[i] = (png_uint_16p)png_malloc(png_ptr,
@@ -2278,7 +2660,7 @@ png_build_16to8_table(png_structp png_ptr, png_uint_16pp *ptable, /* Build a single 8-bit table: same as the 16-bit case but much simpler (and
* typically much faster). Note that libpng currently does no sBIT processing
- * (apparently contrary to the spec) so a 256 entry table is always generated.
+ * (apparently contrary to the spec) so a 256-entry table is always generated.
*/
static void
png_build_8bit_table(png_structp png_ptr, png_bytepp ptable,
@@ -2294,6 +2676,60 @@ png_build_8bit_table(png_structp png_ptr, png_bytepp ptable, table[i] = (png_byte)i;
}
+/* Used from png_read_destroy and below to release the memory used by the gamma
+ * tables.
+ */
+void /* PRIVATE */
+png_destroy_gamma_table(png_structp png_ptr)
+{
+ png_free(png_ptr, png_ptr->gamma_table);
+ png_ptr->gamma_table = NULL;
+
+ if (png_ptr->gamma_16_table != NULL)
+ {
+ int i;
+ int istop = (1 << (8 - png_ptr->gamma_shift));
+ for (i = 0; i < istop; i++)
+ {
+ png_free(png_ptr, png_ptr->gamma_16_table[i]);
+ }
+ png_free(png_ptr, png_ptr->gamma_16_table);
+ png_ptr->gamma_16_table = NULL;
+ }
+
+#if defined(PNG_READ_BACKGROUND_SUPPORTED) || \
+ defined(PNG_READ_ALPHA_MODE_SUPPORTED) || \
+ defined(PNG_READ_RGB_TO_GRAY_SUPPORTED)
+ png_free(png_ptr, png_ptr->gamma_from_1);
+ png_ptr->gamma_from_1 = NULL;
+ png_free(png_ptr, png_ptr->gamma_to_1);
+ png_ptr->gamma_to_1 = NULL;
+
+ if (png_ptr->gamma_16_from_1 != NULL)
+ {
+ int i;
+ int istop = (1 << (8 - png_ptr->gamma_shift));
+ for (i = 0; i < istop; i++)
+ {
+ png_free(png_ptr, png_ptr->gamma_16_from_1[i]);
+ }
+ png_free(png_ptr, png_ptr->gamma_16_from_1);
+ png_ptr->gamma_16_from_1 = NULL;
+ }
+ if (png_ptr->gamma_16_to_1 != NULL)
+ {
+ int i;
+ int istop = (1 << (8 - png_ptr->gamma_shift));
+ for (i = 0; i < istop; i++)
+ {
+ png_free(png_ptr, png_ptr->gamma_16_to_1[i]);
+ }
+ png_free(png_ptr, png_ptr->gamma_16_to_1);
+ png_ptr->gamma_16_to_1 = NULL;
+ }
+#endif /* READ_BACKGROUND || READ_ALPHA_MODE || RGB_TO_GRAY */
+}
+
/* We build the 8- or 16-bit gamma tables here. Note that for 16-bit
* tables, we don't make a full table if we are reducing to 8-bit in
* the future. Note also how the gamma_16 tables are segmented so that
@@ -2304,6 +2740,18 @@ png_build_gamma_table(png_structp png_ptr, int bit_depth) {
png_debug(1, "in png_build_gamma_table");
+ /* Remove any existing table; this copes with multiple calls to
+ * png_read_update_info. The warning is because building the gamma tables
+ * multiple times is a performance hit - it's harmless but the ability to call
+ * png_read_update_info() multiple times is new in 1.5.6 so it seems sensible
+ * to warn if the app introduces such a hit.
+ */
+ if (png_ptr->gamma_table != NULL || png_ptr->gamma_16_table != NULL)
+ {
+ png_warning(png_ptr, "gamma table being rebuilt");
+ png_destroy_gamma_table(png_ptr);
+ }
+
if (bit_depth <= 8)
{
png_build_8bit_table(png_ptr, &png_ptr->gamma_table,
@@ -2348,7 +2796,7 @@ png_build_gamma_table(png_structp png_ptr, int bit_depth) * Where 'iv' is the input color value and 'ov' is the output value -
* pow(iv, gamma).
*
- * Thus the gamma table consists of up to 256 256 entry tables. The table
+ * Thus the gamma table consists of up to 256 256-entry tables. The table
* is selected by the (8-gamma_shift) most significant of the low 8 bits of
* the color value then indexed by the upper 8 bits:
*
diff --git a/plugins/FreeImage/Source/LibPNG/png.h b/plugins/FreeImage/Source/LibPNG/png.h index 2c60503bf6..81267675a5 100644 --- a/plugins/FreeImage/Source/LibPNG/png.h +++ b/plugins/FreeImage/Source/LibPNG/png.h @@ -1,8 +1,8 @@ /* png.h - header file for PNG reference library
*
- * libpng version 1.5.4 - July 7, 2011
- * Copyright (c) 1998-2011 Glenn Randers-Pehrson
+ * libpng version 1.5.9 - February 18, 2012
+ * Copyright (c) 1998-2012 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
@@ -11,7 +11,7 @@ * Authors and maintainers:
* libpng versions 0.71, May 1995, through 0.88, January 1996: Guy Schalnat
* libpng versions 0.89c, June 1996, through 0.96, May 1997: Andreas Dilger
- * libpng versions 0.97, January 1998, through 1.5.4 - July 7, 2011: Glenn
+ * libpng versions 0.97, January 1998, through 1.5.9 - February 18, 2012: Glenn
* See also "Contributing Authors", below.
*
* Note about libpng version numbers:
@@ -157,6 +157,21 @@ * 1.5.4beta01-08 15 10504 15.so.15.4[.0]
* 1.5.4rc01 15 10504 15.so.15.4[.0]
* 1.5.4 15 10504 15.so.15.4[.0]
+ * 1.5.5beta01-08 15 10505 15.so.15.5[.0]
+ * 1.5.5rc01 15 10505 15.so.15.5[.0]
+ * 1.5.5 15 10505 15.so.15.5[.0]
+ * 1.5.6beta01-07 15 10506 15.so.15.6[.0]
+ * 1.5.6rc01-03 15 10506 15.so.15.6[.0]
+ * 1.5.6 15 10506 15.so.15.6[.0]
+ * 1.5.7beta01-05 15 10507 15.so.15.7[.0]
+ * 1.5.7rc01-03 15 10507 15.so.15.7[.0]
+ * 1.5.7 15 10507 15.so.15.7[.0]
+ * 1.5.8beta01 15 10508 15.so.15.8[.0]
+ * 1.5.8rc01 15 10508 15.so.15.8[.0]
+ * 1.5.8 15 10508 15.so.15.8[.0]
+ * 1.5.9beta01-02 15 10509 15.so.15.9[.0]
+ * 1.5.9rc01 15 10509 15.so.15.9[.0]
+ * 1.5.9 15 10509 15.so.15.9[.0]
*
* Henceforth the source version will match the shared-library major
* and minor numbers; the shared-library major version number will be
@@ -188,8 +203,8 @@ *
* This code is released under the libpng license.
*
- * libpng versions 1.2.6, August 15, 2004, through 1.5.4, July 7, 2011, are
- * Copyright (c) 2004, 2006-2011 Glenn Randers-Pehrson, and are
+ * libpng versions 1.2.6, August 15, 2004, through 1.5.9, February 18, 2012, are
+ * Copyright (c) 2004, 2006-2012 Glenn Randers-Pehrson, and are
* distributed according to the same disclaimer and license as libpng-1.2.5
* with the following individual added to the list of Contributing Authors:
*
@@ -300,13 +315,13 @@ * Y2K compliance in libpng:
* =========================
*
- * July 7, 2011
+ * February 18, 2012
*
* Since the PNG Development group is an ad-hoc body, we can't make
* an official declaration.
*
* This is your unofficial assurance that libpng from version 0.71 and
- * upward through 1.5.4 are Y2K compliant. It is my belief that
+ * upward through 1.5.9 are Y2K compliant. It is my belief that
* earlier versions were also Y2K compliant.
*
* Libpng only has two year fields. One is a 2-byte unsigned integer
@@ -358,12 +373,15 @@ * describes how to use libpng, and the file example.c summarizes it
* with some code on which to build. This file is useful for looking
* at the actual function definitions and structure components.
+ *
+ * If you just need to read a PNG file and don't want to read the documentation
+ * skip to the end of this file and read the section entitled 'simplified API'.
*/
/* Version information for png.h - this should match the version in png.c */
-#define PNG_LIBPNG_VER_STRING "1.5.4"
+#define PNG_LIBPNG_VER_STRING "1.5.9"
#define PNG_HEADER_VERSION_STRING \
- " libpng version 1.5.4 - July 7, 2011\n"
+ " libpng version 1.5.9 - February 18, 2012\n"
#define PNG_LIBPNG_VER_SONUM 15
#define PNG_LIBPNG_VER_DLLNUM 15
@@ -371,7 +389,8 @@ /* These should match the first 3 components of PNG_LIBPNG_VER_STRING: */
#define PNG_LIBPNG_VER_MAJOR 1
#define PNG_LIBPNG_VER_MINOR 5
-#define PNG_LIBPNG_VER_RELEASE 4
+#define PNG_LIBPNG_VER_RELEASE 9
+
/* This should match the numeric part of the final component of
* PNG_LIBPNG_VER_STRING, omitting any leading zero:
*/
@@ -401,7 +420,7 @@ * version 1.0.0 was mis-numbered 100 instead of 10000). From
* version 1.0.1 it's xxyyzz, where x=major, y=minor, z=release
*/
-#define PNG_LIBPNG_VER 10504 /* 1.5.4 */
+#define PNG_LIBPNG_VER 10509 /* 1.5.9 */
/* Library configuration: these options cannot be changed after
* the library has been built.
@@ -523,7 +542,7 @@ extern "C" { /* This triggers a compiler error in png.c, if png.c and png.h
* do not agree upon the version number.
*/
-typedef char* png_libpng_version_1_5_4;
+typedef char* png_libpng_version_1_5_9;
/* Three color definitions. The order of the red, green, and blue, (and the
* exact size) is not important, although the size of the fields need to
@@ -598,11 +617,20 @@ typedef png_sPLT_t FAR * FAR * png_sPLT_tpp; #ifdef PNG_TEXT_SUPPORTED
/* png_text holds the contents of a text/ztxt/itxt chunk in a PNG file,
* and whether that contents is compressed or not. The "key" field
- * points to a regular zero-terminated C string. The "text", "lang", and
- * "lang_key" fields can be regular C strings, empty strings, or NULL pointers.
+ * points to a regular zero-terminated C string. The "text" fields can be a
+ * regular C string, an empty string, or a NULL pointer.
* However, the structure returned by png_get_text() will always contain
- * regular zero-terminated C strings (possibly empty), never NULL pointers,
- * so they can be safely used in printf() and other string-handling functions.
+ * the "text" field as a regular zero-terminated C string (possibly
+ * empty), never a NULL pointer, so it can be safely used in printf() and
+ * other string-handling functions. Note that the "itxt_length", "lang", and
+ * "lang_key" members of the structure only exist when the library is built
+ * with iTXt chunk support. Prior to libpng-1.4.0 the library was built by
+ * default without iTXt support. Also note that when iTXt *is* supported,
+ * the "lang" and "lang_key" fields contain NULL pointers when the
+ * "compression" field contains * PNG_TEXT_COMPRESSION_NONE or
+ * PNG_TEXT_COMPRESSION_zTXt. Note that the "compression value" is not the
+ * same as what appears in the PNG tEXt/zTXt/iTXt chunk's "compression flag"
+ * which is always 0 or 1, or its "compression method" which is always 0.
*/
typedef struct png_text_struct
{
@@ -793,7 +821,7 @@ typedef png_info FAR * FAR * png_infopp; #define PNG_INFO_iCCP 0x1000 /* ESR, 1.0.6 */
#define PNG_INFO_sPLT 0x2000 /* ESR, 1.0.6 */
#define PNG_INFO_sCAL 0x4000 /* ESR, 1.0.6 */
-#define PNG_INFO_IDAT 0x8000L /* ESR, 1.0.6 */
+#define PNG_INFO_IDAT 0x8000 /* ESR, 1.0.6 */
/* This is used for the transformation routines, as some of them
* change these values for the row. It also should enable using
@@ -1117,6 +1145,11 @@ PNG_EXPORT(31, void, png_set_gray_to_rgb, (png_structp png_ptr)); #ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED
/* Reduce RGB to grayscale. */
+#define PNG_ERROR_ACTION_NONE 1
+#define PNG_ERROR_ACTION_WARN 2
+#define PNG_ERROR_ACTION_ERROR 3
+#define PNG_RGB_TO_GRAY_DEFAULT (-1)/*for red/green coefficients*/
+
PNG_FP_EXPORT(32, void, png_set_rgb_to_gray, (png_structp png_ptr,
int error_action, double red, double green));
PNG_FIXED_EXPORT(33, void, png_set_rgb_to_gray_fixed, (png_structp png_ptr,
@@ -1827,6 +1860,7 @@ PNG_EXPORT(219, png_size_t, png_process_data_pause, (png_structp, int save)); */
PNG_EXPORT(220, png_uint_32, png_process_data_skip, (png_structp));
+#ifdef PNG_READ_INTERLACING_SUPPORTED
/* Function that combines rows. 'new_row' is a flag that should come from
* the callback and be non-NULL if anything needs to be done; the library
* stores its own version of the new data internally and ignores the passed
@@ -1834,6 +1868,7 @@ PNG_EXPORT(220, png_uint_32, png_process_data_skip, (png_structp)); */
PNG_EXPORT(93, void, png_progressive_combine_row, (png_structp png_ptr,
png_bytep old_row, png_const_bytep new_row));
+#endif /* PNG_READ_INTERLACING_SUPPORTED */
#endif /* PNG_PROGRESSIVE_READ_SUPPORTED */
PNG_EXPORTA(94, png_voidp, png_malloc,
@@ -2047,6 +2082,10 @@ PNG_FP_EXPORT(133, png_uint_32, png_get_cHRM, (png_const_structp png_ptr, png_const_infop info_ptr, double *white_x, double *white_y, double *red_x,
double *red_y, double *green_x, double *green_y, double *blue_x,
double *blue_y));
+PNG_FP_EXPORT(230, png_uint_32, png_get_cHRM_XYZ, (png_structp png_ptr,
+ png_const_infop info_ptr, double *red_X, double *red_Y, double *red_Z,
+ double *green_X, double *green_Y, double *green_Z, double *blue_X,
+ double *blue_Y, double *blue_Z));
#ifdef PNG_FIXED_POINT_SUPPORTED /* Otherwise not implemented */
PNG_FIXED_EXPORT(134, png_uint_32, png_get_cHRM_fixed,
(png_const_structp png_ptr,
@@ -2056,6 +2095,13 @@ PNG_FIXED_EXPORT(134, png_uint_32, png_get_cHRM_fixed, png_fixed_point *int_green_y, png_fixed_point *int_blue_x,
png_fixed_point *int_blue_y));
#endif
+PNG_FIXED_EXPORT(231, png_uint_32, png_get_cHRM_XYZ_fixed,
+ (png_structp png_ptr, png_const_infop info_ptr,
+ png_fixed_point *int_red_X, png_fixed_point *int_red_Y,
+ png_fixed_point *int_red_Z, png_fixed_point *int_green_X,
+ png_fixed_point *int_green_Y, png_fixed_point *int_green_Z,
+ png_fixed_point *int_blue_X, png_fixed_point *int_blue_Y,
+ png_fixed_point *int_blue_Z));
#endif
#ifdef PNG_cHRM_SUPPORTED
@@ -2063,12 +2109,22 @@ PNG_FP_EXPORT(135, void, png_set_cHRM, (png_structp png_ptr, png_infop info_ptr,
double white_x, double white_y, double red_x, double red_y, double green_x,
double green_y, double blue_x, double blue_y));
+PNG_FP_EXPORT(232, void, png_set_cHRM_XYZ, (png_structp png_ptr,
+ png_infop info_ptr, double red_X, double red_Y, double red_Z,
+ double green_X, double green_Y, double green_Z, double blue_X,
+ double blue_Y, double blue_Z));
PNG_FIXED_EXPORT(136, void, png_set_cHRM_fixed, (png_structp png_ptr,
png_infop info_ptr, png_fixed_point int_white_x,
png_fixed_point int_white_y, png_fixed_point int_red_x,
png_fixed_point int_red_y, png_fixed_point int_green_x,
png_fixed_point int_green_y, png_fixed_point int_blue_x,
png_fixed_point int_blue_y));
+PNG_FIXED_EXPORT(233, void, png_set_cHRM_XYZ_fixed, (png_structp png_ptr,
+ png_infop info_ptr, png_fixed_point int_red_X, png_fixed_point int_red_Y,
+ png_fixed_point int_red_Z, png_fixed_point int_green_X,
+ png_fixed_point int_green_Y, png_fixed_point int_green_Z,
+ png_fixed_point int_blue_X, png_fixed_point int_blue_Y,
+ png_fixed_point int_blue_Z));
#endif
#ifdef PNG_gAMA_SUPPORTED
@@ -2281,15 +2337,21 @@ PNG_EXPORT(171, void, png_set_sCAL_s, /* Provide a list of chunks and how they are to be handled, if the built-in
handling or default unknown chunk handling is not desired. Any chunks not
listed will be handled in the default manner. The IHDR and IEND chunks
- must not be listed.
- keep = 0: follow default behaviour
- = 1: do not keep
- = 2: keep only if safe-to-copy
- = 3: keep even if unsafe-to-copy
+ must not be listed. Because this turns off the default handling for chunks
+ that would otherwise be recognized the behavior of libpng transformations may
+ well become incorrect!
+ keep = 0: PNG_HANDLE_CHUNK_AS_DEFAULT: follow default behavior
+ = 1: PNG_HANDLE_CHUNK_NEVER: do not keep
+ = 2: PNG_HANDLE_CHUNK_IF_SAFE: keep only if safe-to-copy
+ = 3: PNG_HANDLE_CHUNK_ALWAYS: keep even if unsafe-to-copy
*/
PNG_EXPORT(172, void, png_set_keep_unknown_chunks,
(png_structp png_ptr, int keep,
png_const_bytep chunk_list, int num_chunks));
+
+/* The handling code is returned; the result is therefore true (non-zero) if
+ * special handling is required, false for the default handling.
+ */
PNG_EXPORT(173, int, png_handle_as_unknown, (png_structp png_ptr,
png_const_bytep chunk_name));
#endif
@@ -2429,8 +2491,16 @@ PNG_EXPORT(216, png_uint_32, png_get_io_chunk_type, * full, image which appears in a given pass. 'pass' is in the range 0
* to 6 and the result is in the range 0 to 7.
*/
-#define PNG_PASS_START_ROW(pass) (((1U&~(pass))<<(3-((pass)>>1)))&7)
-#define PNG_PASS_START_COL(pass) (((1U& (pass))<<(3-(((pass)+1)>>1)))&7)
+#define PNG_PASS_START_ROW(pass) (((1&~(pass))<<(3-((pass)>>1)))&7)
+#define PNG_PASS_START_COL(pass) (((1& (pass))<<(3-(((pass)+1)>>1)))&7)
+
+/* A macro to return the offset between pixels in the output row for a pair of
+ * pixels in the input - effectively the inverse of the 'COL_SHIFT' macro that
+ * follows. Note that ROW_OFFSET is the offset from one row to the next whereas
+ * COL_OFFSET is from one column to the next, within a row.
+ */
+#define PNG_PASS_ROW_OFFSET(pass) ((pass)>2?(8>>(((pass)-1)>>1)):8)
+#define PNG_PASS_COL_OFFSET(pass) (1<<((7-(pass))>>1))
/* Two macros to help evaluate the number of rows or columns in each
* pass. This is expressed as a shift - effectively log2 of the number or
@@ -2465,8 +2535,8 @@ PNG_EXPORT(216, png_uint_32, png_get_io_chunk_type, * the tile.
*/
#define PNG_PASS_MASK(pass,off) ( \
- ((0x110145AFU>>(((7-(off))-(pass))<<2)) & 0xFU) | \
- ((0x01145AF0U>>(((7-(off))-(pass))<<2)) & 0xF0U))
+ ((0x110145AF>>(((7-(off))-(pass))<<2)) & 0xF) | \
+ ((0x01145AF0>>(((7-(off))-(pass))<<2)) & 0xF0))
#define PNG_ROW_IN_INTERLACE_PASS(y, pass) \
((PNG_PASS_MASK(pass,0) >> ((y)&7)) & 1)
@@ -2492,14 +2562,14 @@ PNG_EXPORT(216, png_uint_32, png_get_io_chunk_type, { png_uint_16 temp = (png_uint_16)((png_uint_16)(fg) \
* (png_uint_16)(alpha) \
+ (png_uint_16)(bg)*(png_uint_16)(255 \
- - (png_uint_16)(alpha)) + (png_uint_16)128); \
+ - (png_uint_16)(alpha)) + 128); \
(composite) = (png_byte)((temp + (temp >> 8)) >> 8); }
# define png_composite_16(composite, fg, alpha, bg) \
{ png_uint_32 temp = (png_uint_32)((png_uint_32)(fg) \
* (png_uint_32)(alpha) \
- + (png_uint_32)(bg)*(png_uint_32)(65535L \
- - (png_uint_32)(alpha)) + (png_uint_32)32768L); \
+ + (png_uint_32)(bg)*(65535 \
+ - (png_uint_32)(alpha)) + 32768); \
(composite) = (png_uint_16)((temp + (temp >> 16)) >> 16); }
#else /* Standard method using integer division */
@@ -2507,12 +2577,12 @@ PNG_EXPORT(216, png_uint_32, png_get_io_chunk_type, # define png_composite(composite, fg, alpha, bg) \
(composite) = (png_byte)(((png_uint_16)(fg) * (png_uint_16)(alpha) + \
(png_uint_16)(bg) * (png_uint_16)(255 - (png_uint_16)(alpha)) + \
- (png_uint_16)127) / 255)
+ 127) / 255)
# define png_composite_16(composite, fg, alpha, bg) \
(composite) = (png_uint_16)(((png_uint_32)(fg) * (png_uint_32)(alpha) + \
- (png_uint_32)(bg)*(png_uint_32)(65535L - (png_uint_32)(alpha)) + \
- (png_uint_32)32767) / (png_uint_32)65535L)
+ (png_uint_32)(bg)*(png_uint_32)(65535 - (png_uint_32)(alpha)) + \
+ 32767) / 65535)
#endif /* PNG_READ_COMPOSITE_NODIV_SUPPORTED */
#ifdef PNG_READ_INT_FUNCTIONS_SUPPORTED
@@ -2576,7 +2646,7 @@ PNG_EXPORT(207, void, png_save_uint_16, (png_bytep buf, unsigned int i)); * scripts/symbols.def as well.
*/
#ifdef PNG_EXPORT_LAST_ORDINAL
- PNG_EXPORT_LAST_ORDINAL(229);
+ PNG_EXPORT_LAST_ORDINAL(233);
#endif
#ifdef __cplusplus
diff --git a/plugins/FreeImage/Source/LibPNG/pngconf.h b/plugins/FreeImage/Source/LibPNG/pngconf.h index a135c4e79b..3fea47b860 100644 --- a/plugins/FreeImage/Source/LibPNG/pngconf.h +++ b/plugins/FreeImage/Source/LibPNG/pngconf.h @@ -1,9 +1,9 @@ /* pngconf.h - machine configurable file for libpng
*
- * libpng version 1.5.4 - July 7, 2011
+ * libpng version 1.5.9 - February 18, 2012
*
- * Copyright (c) 1998-2011 Glenn Randers-Pehrson
+ * Copyright (c) 1998-2012 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
@@ -164,7 +164,9 @@ * 'type', compiler specific.
*
* PNG_DLL_EXPORT Set to the magic to use during a libpng build to
- * make a symbol exported from the DLL.
+ * make a symbol exported from the DLL. Not used in the
+ * public header files; see pngpriv.h for how it is used
+ * in the libpng build.
*
* PNG_DLL_IMPORT Set to the magic to force the libpng symbols to come
* from a DLL - used to define PNG_IMPEXP when
@@ -258,25 +260,14 @@ # define PNGAPI PNGCAPI
#endif
-/* The default for PNG_IMPEXP depends on whether the library is
- * being built or used.
+/* PNG_IMPEXP may be set on the compilation system command line or (if not set)
+ * then in an internal header file when building the library, otherwise (when
+ * using the library) it is set here.
*/
#ifndef PNG_IMPEXP
-# ifdef PNGLIB_BUILD
- /* Building the library */
-# if (defined(DLL_EXPORT)/*from libtool*/ ||\
- defined(_WINDLL) || defined(_DLL) || defined(__DLL__) ||\
- defined(_USRDLL) ||\
- defined(PNG_BUILD_DLL)) && defined(PNG_DLL_EXPORT)
- /* Building a DLL. */
-# define PNG_IMPEXP PNG_DLL_EXPORT
-# endif /* DLL */
-# else
- /* Using the library */
-# if defined(PNG_USE_DLL) && defined(PNG_DLL_IMPORT)
- /* This forces use of a DLL, disallowing static linking */
-# define PNG_IMPEXP PNG_DLL_IMPORT
-# endif
+# if defined(PNG_USE_DLL) && defined(PNG_DLL_IMPORT)
+ /* This forces use of a DLL, disallowing static linking */
+# define PNG_IMPEXP PNG_DLL_IMPORT
# endif
# ifndef PNG_IMPEXP
@@ -356,25 +347,18 @@ # ifndef PNG_ALLOCATED
# define PNG_ALLOCATED __attribute__((__malloc__))
# endif
-
- /* This specifically protects structure members that should only be
- * accessed from within the library, therefore should be empty during
- * a library build.
- */
-# ifndef PNGLIB_BUILD
-# ifndef PNG_DEPRECATED
-# define PNG_DEPRECATED __attribute__((__deprecated__))
-# endif
-# ifndef PNG_PRIVATE
-# if 0 /* Doesn't work so we use deprecated instead*/
-# define PNG_PRIVATE \
- __attribute__((warning("This function is not exported by libpng.")))
-# else
-# define PNG_PRIVATE \
- __attribute__((__deprecated__))
-# endif
+# ifndef PNG_DEPRECATED
+# define PNG_DEPRECATED __attribute__((__deprecated__))
+# endif
+# ifndef PNG_PRIVATE
+# if 0 /* Doesn't work so we use deprecated instead*/
+# define PNG_PRIVATE \
+ __attribute__((warning("This function is not exported by libpng.")))
+# else
+# define PNG_PRIVATE \
+ __attribute__((__deprecated__))
# endif
-# endif /* PNGLIB_BUILD */
+# endif
# endif /* __GNUC__ */
# if defined(_MSC_VER) && (_MSC_VER >= 1300)
@@ -382,26 +366,19 @@ # define PNG_USE_RESULT /* not supported */
# endif
# ifndef PNG_NORETURN
-# define PNG_NORETURN __declspec(noreturn)
+# define PNG_NORETURN __declspec(noreturn)
# endif
# ifndef PNG_ALLOCATED
# if (_MSC_VER >= 1400)
# define PNG_ALLOCATED __declspec(restrict)
# endif
# endif
-
- /* This specifically protects structure members that should only be
- * accessed from within the library, therefore should be empty during
- * a library build.
- */
-# ifndef PNGLIB_BUILD
-# ifndef PNG_DEPRECATED
-# define PNG_DEPRECATED __declspec(deprecated)
-# endif
-# ifndef PNG_PRIVATE
-# define PNG_PRIVATE __declspec(deprecated)
-# endif
-# endif /* PNGLIB_BUILD */
+# ifndef PNG_DEPRECATED
+# define PNG_DEPRECATED __declspec(deprecated)
+# endif
+# ifndef PNG_PRIVATE
+# define PNG_PRIVATE __declspec(deprecated)
+# endif
# endif /* _MSC_VER */
#endif /* PNG_PEDANTIC_WARNINGS */
diff --git a/plugins/FreeImage/Source/LibPNG/pngerror.c b/plugins/FreeImage/Source/LibPNG/pngerror.c index 4a76644be2..9df97f583c 100644 --- a/plugins/FreeImage/Source/LibPNG/pngerror.c +++ b/plugins/FreeImage/Source/LibPNG/pngerror.c @@ -1,8 +1,8 @@ /* pngerror.c - stub functions for i/o and memory allocation
*
- * Last changed in libpng 1.5.4 [July 7, 2011]
- * Copyright (c) 1998-2011 Glenn Randers-Pehrson
+ * Last changed in libpng 1.5.8 [February 1, 2011]
+ * Copyright (c) 1998-2012 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
@@ -281,35 +281,40 @@ void png_formatted_warning(png_structp png_ptr, png_warning_parameters p,
png_const_charp message)
{
- /* The internal buffer is just 128 bytes - enough for all our messages,
- * overflow doesn't happen because this code checks!
+ /* The internal buffer is just 192 bytes - enough for all our messages,
+ * overflow doesn't happen because this code checks! If someone figures
+ * out how to send us a message longer than 192 bytes, all that will
+ * happen is that the message will be truncated appropriately.
*/
- size_t i;
- char msg[128];
-
- for (i=0; i<(sizeof msg)-1 && *message != '\0'; ++i)
+ size_t i = 0; /* Index in the msg[] buffer: */
+ char msg[192];
+
+ /* Each iteration through the following loop writes at most one character
+ * to msg[i++] then returns here to validate that there is still space for
+ * the trailing '\0'. It may (in the case of a parameter) read more than
+ * one character from message[]; it must check for '\0' and continue to the
+ * test if it finds the end of string.
+ */
+ while (i<(sizeof msg)-1 && *message != '\0')
{
- if (*message == '@')
+ /* '@' at end of string is now just printed (previously it was skipped);
+ * it is an error in the calling code to terminate the string with @.
+ */
+ if (p != NULL && *message == '@' && message[1] != '\0')
{
- int parameter = -1;
- switch (*++message)
- {
- case '1':
- parameter = 0;
- break;
-
- case '2':
- parameter = 1;
- break;
-
- case '\0':
- continue; /* To break out of the for loop above. */
+ int parameter_char = *++message; /* Consume the '@' */
+ static const char valid_parameters[] = "123456789";
+ int parameter = 0;
- default:
- break;
- }
+ /* Search for the parameter digit, the index in the string is the
+ * parameter to use.
+ */
+ while (valid_parameters[parameter] != parameter_char &&
+ valid_parameters[parameter] != '\0')
+ ++parameter;
- if (parameter >= 0 && parameter < PNG_WARNING_PARAMETER_COUNT)
+ /* If the parameter digit is out of range it will just get printed. */
+ if (parameter < PNG_WARNING_PARAMETER_COUNT)
{
/* Append this parameter */
png_const_charp parm = p[parameter];
@@ -319,28 +324,32 @@ png_formatted_warning(png_structp png_ptr, png_warning_parameters p, * that parm[] has been initialized, so there is no guarantee of a
* trailing '\0':
*/
- for (; i<(sizeof msg)-1 && parm != '\0' && parm < pend; ++i)
- msg[i] = *parm++;
+ while (i<(sizeof msg)-1 && *parm != '\0' && parm < pend)
+ msg[i++] = *parm++;
+ /* Consume the parameter digit too: */
++message;
continue;
}
/* else not a parameter and there is a character after the @ sign; just
- * copy that.
+ * copy that. This is known not to be '\0' because of the test above.
*/
}
/* At this point *message can't be '\0', even in the bad parameter case
* above where there is a lone '@' at the end of the message string.
*/
- msg[i] = *message++;
+ msg[i++] = *message++;
}
/* i is always less than (sizeof msg), so: */
msg[i] = '\0';
- /* And this is the formatted message: */
+ /* And this is the formatted message, it may be larger than
+ * PNG_MAX_ERROR_TEXT, but that is only used for 'chunk' errors and these are
+ * not (currently) formatted.
+ */
png_warning(png_ptr, msg);
}
#endif /* PNG_WARNINGS_SUPPORTED */
@@ -374,11 +383,14 @@ static void /* PRIVATE */ png_format_buffer(png_structp png_ptr, png_charp buffer, png_const_charp
error_message)
{
- int iout = 0, iin = 0;
+ png_uint_32 chunk_name = png_ptr->chunk_name;
+ int iout = 0, ishift = 24;
- while (iin < 4)
+ while (ishift >= 0)
{
- int c = png_ptr->chunk_name[iin++];
+ int c = (int)(chunk_name >> ishift) & 0xff;
+
+ ishift -= 8;
if (isnonalpha(c))
{
buffer[iout++] = PNG_LITERAL_LEFT_SQUARE_BRACKET;
@@ -389,7 +401,7 @@ png_format_buffer(png_structp png_ptr, png_charp buffer, png_const_charp else
{
- buffer[iout++] = (png_byte)c;
+ buffer[iout++] = (char)c;
}
}
@@ -398,10 +410,11 @@ png_format_buffer(png_structp png_ptr, png_charp buffer, png_const_charp else
{
+ int iin = 0;
+
buffer[iout++] = ':';
buffer[iout++] = ' ';
- iin = 0;
while (iin < PNG_MAX_ERROR_TEXT-1 && error_message[iin] != '\0')
buffer[iout++] = error_message[iin++];
diff --git a/plugins/FreeImage/Source/LibPNG/pngget.c b/plugins/FreeImage/Source/LibPNG/pngget.c index 72ddaef2d8..1889e9903e 100644 --- a/plugins/FreeImage/Source/LibPNG/pngget.c +++ b/plugins/FreeImage/Source/LibPNG/pngget.c @@ -1,7 +1,7 @@ /* pngget.c - retrieval of values from info struct
*
- * Last changed in libpng 1.5.1 [February 3, 2011]
+ * Last changed in libpng 1.5.7 [December 15, 2011]
* Copyright (c) 1998-2011 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -459,6 +459,65 @@ png_get_bKGD(png_const_structp png_ptr, png_infop info_ptr, #endif
#ifdef PNG_cHRM_SUPPORTED
+/* The XYZ APIs were added in 1.5.5 to take advantage of the code added at the
+ * same time to correct the rgb grayscale coefficient defaults obtained from the
+ * cHRM chunk in 1.5.4
+ */
+png_uint_32 PNGFAPI
+png_get_cHRM_XYZ_fixed(png_structp png_ptr, png_const_infop info_ptr,
+ png_fixed_point *int_red_X, png_fixed_point *int_red_Y,
+ png_fixed_point *int_red_Z, png_fixed_point *int_green_X,
+ png_fixed_point *int_green_Y, png_fixed_point *int_green_Z,
+ png_fixed_point *int_blue_X, png_fixed_point *int_blue_Y,
+ png_fixed_point *int_blue_Z)
+{
+ if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM))
+ {
+ png_xy xy;
+ png_XYZ XYZ;
+
+ png_debug1(1, "in %s retrieval function", "cHRM_XYZ");
+
+ xy.whitex = info_ptr->x_white;
+ xy.whitey = info_ptr->y_white;
+ xy.redx = info_ptr->x_red;
+ xy.redy = info_ptr->y_red;
+ xy.greenx = info_ptr->x_green;
+ xy.greeny = info_ptr->y_green;
+ xy.bluex = info_ptr->x_blue;
+ xy.bluey = info_ptr->y_blue;
+
+ /* The *_checked function handles error reporting, so just return 0 if
+ * there is a failure here.
+ */
+ if (png_XYZ_from_xy_checked(png_ptr, &XYZ, xy))
+ {
+ if (int_red_X != NULL)
+ *int_red_X = XYZ.redX;
+ if (int_red_Y != NULL)
+ *int_red_Y = XYZ.redY;
+ if (int_red_Z != NULL)
+ *int_red_Z = XYZ.redZ;
+ if (int_green_X != NULL)
+ *int_green_X = XYZ.greenX;
+ if (int_green_Y != NULL)
+ *int_green_Y = XYZ.greenY;
+ if (int_green_Z != NULL)
+ *int_green_Z = XYZ.greenZ;
+ if (int_blue_X != NULL)
+ *int_blue_X = XYZ.blueX;
+ if (int_blue_Y != NULL)
+ *int_blue_Y = XYZ.blueY;
+ if (int_blue_Z != NULL)
+ *int_blue_Z = XYZ.blueZ;
+
+ return (PNG_INFO_cHRM);
+ }
+ }
+
+ return (0);
+}
+
# ifdef PNG_FLOATING_POINT_SUPPORTED
png_uint_32 PNGAPI
png_get_cHRM(png_const_structp png_ptr, png_const_infop info_ptr,
@@ -490,6 +549,42 @@ png_get_cHRM(png_const_structp png_ptr, png_const_infop info_ptr, return (0);
}
+
+png_uint_32 PNGAPI
+png_get_cHRM_XYZ(png_structp png_ptr, png_const_infop info_ptr,
+ double *red_X, double *red_Y, double *red_Z, double *green_X,
+ double *green_Y, double *green_Z, double *blue_X, double *blue_Y,
+ double *blue_Z)
+{
+ png_XYZ XYZ;
+
+ if (png_get_cHRM_XYZ_fixed(png_ptr, info_ptr,
+ &XYZ.redX, &XYZ.redY, &XYZ.redZ, &XYZ.greenX, &XYZ.greenY, &XYZ.greenZ,
+ &XYZ.blueX, &XYZ.blueY, &XYZ.blueZ) & PNG_INFO_cHRM)
+ {
+ if (red_X != NULL)
+ *red_X = png_float(png_ptr, XYZ.redX, "cHRM red X");
+ if (red_Y != NULL)
+ *red_Y = png_float(png_ptr, XYZ.redY, "cHRM red Y");
+ if (red_Z != NULL)
+ *red_Z = png_float(png_ptr, XYZ.redZ, "cHRM red Z");
+ if (green_X != NULL)
+ *green_X = png_float(png_ptr, XYZ.greenX, "cHRM green X");
+ if (green_Y != NULL)
+ *green_Y = png_float(png_ptr, XYZ.greenY, "cHRM green Y");
+ if (green_Z != NULL)
+ *green_Z = png_float(png_ptr, XYZ.greenZ, "cHRM green Z");
+ if (blue_X != NULL)
+ *blue_X = png_float(png_ptr, XYZ.blueX, "cHRM blue X");
+ if (blue_Y != NULL)
+ *blue_Y = png_float(png_ptr, XYZ.blueY, "cHRM blue Y");
+ if (blue_Z != NULL)
+ *blue_Z = png_float(png_ptr, XYZ.blueZ, "cHRM blue Z");
+ return (PNG_INFO_cHRM);
+ }
+
+ return (0);
+}
# endif
# ifdef PNG_FIXED_POINT_SUPPORTED
@@ -587,15 +682,16 @@ png_get_iCCP(png_const_structp png_ptr, png_const_infop info_ptr, png_debug1(1, "in %s retrieval function", "iCCP");
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_iCCP)
- && name != NULL && profile != NULL && proflen != NULL)
+ && name != NULL && compression_type != NULL && profile != NULL &&
+ proflen != NULL)
{
*name = info_ptr->iccp_name;
*profile = info_ptr->iccp_profile;
/* Compression_type is a dummy so the API won't have to change
* if we introduce multiple compression types later.
*/
- *proflen = (int)info_ptr->iccp_proflen;
- *compression_type = (int)info_ptr->iccp_compression;
+ *proflen = info_ptr->iccp_proflen;
+ *compression_type = info_ptr->iccp_compression;
return (PNG_INFO_iCCP);
}
@@ -855,9 +951,8 @@ png_get_text(png_const_structp png_ptr, png_const_infop info_ptr, {
if (png_ptr != NULL && info_ptr != NULL && info_ptr->num_text > 0)
{
- png_debug1(1, "in %s retrieval function",
- (png_ptr->chunk_name[0] == '\0' ? "text" :
- (png_const_charp)png_ptr->chunk_name));
+ png_debug1(1, "in 0x%lx retrieval function",
+ (unsigned long)png_ptr->chunk_name);
if (text_ptr != NULL)
*text_ptr = info_ptr->text;
@@ -971,10 +1066,9 @@ png_get_user_chunk_ptr(png_const_structp png_ptr) png_size_t PNGAPI
png_get_compression_buffer_size(png_const_structp png_ptr)
{
- return (png_ptr ? png_ptr->zbuf_size : 0L);
+ return (png_ptr ? png_ptr->zbuf_size : 0);
}
-
#ifdef PNG_SET_USER_LIMITS_SUPPORTED
/* These functions were added to libpng 1.2.6 and were enabled
* by default in libpng-1.4.0 */
@@ -1016,16 +1110,14 @@ png_get_io_state (png_structp png_ptr) png_uint_32 PNGAPI
png_get_io_chunk_type (png_const_structp png_ptr)
{
- return ((png_ptr->chunk_name[0] << 24) +
- (png_ptr->chunk_name[1] << 16) +
- (png_ptr->chunk_name[2] << 8) +
- (png_ptr->chunk_name[3]));
+ return png_ptr->chunk_name;
}
png_const_bytep PNGAPI
png_get_io_chunk_name (png_structp png_ptr)
{
- return png_ptr->chunk_name;
+ PNG_CSTRING_FROM_CHUNK(png_ptr->io_chunk_string, png_ptr->chunk_name);
+ return png_ptr->io_chunk_string;
}
#endif /* ?PNG_IO_STATE_SUPPORTED */
diff --git a/plugins/FreeImage/Source/LibPNG/pnglibconf.h b/plugins/FreeImage/Source/LibPNG/pnglibconf.h index 3ce4ac8e72..8022a5a881 100644 --- a/plugins/FreeImage/Source/LibPNG/pnglibconf.h +++ b/plugins/FreeImage/Source/LibPNG/pnglibconf.h @@ -1,187 +1,187 @@ -
-/* libpng STANDARD API DEFINITION */
-
-/* pnglibconf.h - library build configuration */
-
-/* libpng version 1.5.4 - last changed on June 22, 2011 */
-
-/* Copyright (c) 1998-2011 Glenn Randers-Pehrson */
-
-/* This code is released under the libpng license. */
-/* For conditions of distribution and use, see the disclaimer */
-/* and license in png.h */
-
-/* pnglibconf.h */
-/* Derived from: scripts/pnglibconf.dfa */
-/* If you edit this file by hand you must obey the rules expressed in */
-/* pnglibconf.dfa with respect to the dependencies between the following */
-/* symbols. It is much better to generate a new file using */
-/* scripts/libpngconf.mak */
-
-#ifndef PNGLCONF_H
-#define PNGLCONF_H
-/* settings */
-#define PNG_API_RULE 0
-#define PNG_CALLOC_SUPPORTED
-#define PNG_COST_SHIFT 3
-#define PNG_DEFAULT_READ_MACROS 1
-#define PNG_GAMMA_THRESHOLD_FIXED 5000
-#define PNG_MAX_GAMMA_8 11
-#define PNG_QUANTIZE_BLUE_BITS 5
-#define PNG_QUANTIZE_GREEN_BITS 5
-#define PNG_QUANTIZE_RED_BITS 5
-#define PNG_sCAL_PRECISION 5
-#define PNG_USER_CHUNK_CACHE_MAX 0
-#define PNG_USER_CHUNK_MALLOC_MAX 0
-#define PNG_USER_HEIGHT_MAX 1000000L
-#define PNG_USER_WIDTH_MAX 1000000L
-#define PNG_WEIGHT_SHIFT 8
-#define PNG_ZBUF_SIZE 8192
-/* end of settings */
-/* options */
-#define PNG_16BIT_SUPPORTED
-#define PNG_ALIGN_MEMORY_SUPPORTED
-#define PNG_BENIGN_ERRORS_SUPPORTED
-#define PNG_bKGD_SUPPORTED
-#define PNG_BUILD_GRAYSCALE_PALETTE_SUPPORTED
-#define PNG_CHECK_cHRM_SUPPORTED
-#define PNG_cHRM_SUPPORTED
-#define PNG_CONSOLE_IO_SUPPORTED
-#define PNG_CONVERT_tIME_SUPPORTED
-#define PNG_EASY_ACCESS_SUPPORTED
-/*#undef PNG_ERROR_NUMBERS_SUPPORTED*/
-#define PNG_ERROR_TEXT_SUPPORTED
-#define PNG_FIXED_POINT_SUPPORTED
-#define PNG_FLOATING_ARITHMETIC_SUPPORTED
-#define PNG_FLOATING_POINT_SUPPORTED
-#define PNG_gAMA_SUPPORTED
-#define PNG_HANDLE_AS_UNKNOWN_SUPPORTED
-#define PNG_hIST_SUPPORTED
-#define PNG_iCCP_SUPPORTED
-#define PNG_INCH_CONVERSIONS_SUPPORTED
-#define PNG_INFO_IMAGE_SUPPORTED
-#define PNG_IO_STATE_SUPPORTED
-#define PNG_iTXt_SUPPORTED
-#define PNG_MNG_FEATURES_SUPPORTED
-#define PNG_oFFs_SUPPORTED
-#define PNG_pCAL_SUPPORTED
-#define PNG_pHYs_SUPPORTED
-#define PNG_POINTER_INDEXING_SUPPORTED
-#define PNG_PROGRESSIVE_READ_SUPPORTED
-#define PNG_READ_16BIT_SUPPORTED
-#define PNG_READ_ALPHA_MODE_SUPPORTED
-#define PNG_READ_ANCILLARY_CHUNKS_SUPPORTED
-#define PNG_READ_BACKGROUND_SUPPORTED
-#define PNG_READ_BGR_SUPPORTED
-#define PNG_READ_bKGD_SUPPORTED
-#define PNG_READ_cHRM_SUPPORTED
-#define PNG_READ_COMPOSITE_NODIV_SUPPORTED
-#define PNG_READ_COMPRESSED_TEXT_SUPPORTED
-#define PNG_READ_EXPAND_16_SUPPORTED
-#define PNG_READ_EXPAND_SUPPORTED
-#define PNG_READ_FILLER_SUPPORTED
-#define PNG_READ_gAMA_SUPPORTED
-#define PNG_READ_GAMMA_SUPPORTED
-#define PNG_READ_GRAY_TO_RGB_SUPPORTED
-#define PNG_READ_hIST_SUPPORTED
-#define PNG_READ_iCCP_SUPPORTED
-#define PNG_READ_INTERLACING_SUPPORTED
-#define PNG_READ_INT_FUNCTIONS_SUPPORTED
-#define PNG_READ_INVERT_ALPHA_SUPPORTED
-#define PNG_READ_INVERT_SUPPORTED
-#define PNG_READ_iTXt_SUPPORTED
-#define PNG_READ_oFFs_SUPPORTED
-#define PNG_READ_OPT_PLTE_SUPPORTED
-#define PNG_READ_PACK_SUPPORTED
-#define PNG_READ_PACKSWAP_SUPPORTED
-#define PNG_READ_pCAL_SUPPORTED
-#define PNG_READ_pHYs_SUPPORTED
-#define PNG_READ_QUANTIZE_SUPPORTED
-#define PNG_READ_RGB_TO_GRAY_SUPPORTED
-#define PNG_READ_sBIT_SUPPORTED
-#define PNG_READ_SCALE_16_TO_8_SUPPORTED
-#define PNG_READ_sCAL_SUPPORTED
-#define PNG_READ_SHIFT_SUPPORTED
-#define PNG_READ_sPLT_SUPPORTED
-#define PNG_READ_sRGB_SUPPORTED
-#define PNG_READ_STRIP_16_TO_8_SUPPORTED
-#define PNG_READ_STRIP_ALPHA_SUPPORTED
-#define PNG_READ_SUPPORTED
-#define PNG_READ_SWAP_ALPHA_SUPPORTED
-#define PNG_READ_SWAP_SUPPORTED
-#define PNG_READ_tEXt_SUPPORTED
-#define PNG_READ_TEXT_SUPPORTED
-#define PNG_READ_tIME_SUPPORTED
-#define PNG_READ_TRANSFORMS_SUPPORTED
-#define PNG_READ_tRNS_SUPPORTED
-#define PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
-#define PNG_READ_USER_CHUNKS_SUPPORTED
-#define PNG_READ_USER_TRANSFORM_SUPPORTED
-#define PNG_READ_zTXt_SUPPORTED
-#define PNG_SAVE_INT_32_SUPPORTED
-#define PNG_sBIT_SUPPORTED
-#define PNG_sCAL_SUPPORTED
-#define PNG_SEQUENTIAL_READ_SUPPORTED
-#define PNG_SET_CHUNK_CACHE_LIMIT_SUPPORTED
-#define PNG_SET_CHUNK_MALLOC_LIMIT_SUPPORTED
-#define PNG_SETJMP_SUPPORTED
-#define PNG_SET_USER_LIMITS_SUPPORTED
-#define PNG_sPLT_SUPPORTED
-#define PNG_sRGB_SUPPORTED
-#define PNG_STDIO_SUPPORTED
-#define PNG_tEXt_SUPPORTED
-#define PNG_TEXT_SUPPORTED
-#define PNG_TIME_RFC1123_SUPPORTED
-#define PNG_tIME_SUPPORTED
-#define PNG_tRNS_SUPPORTED
-#define PNG_UNKNOWN_CHUNKS_SUPPORTED
-#define PNG_USER_CHUNKS_SUPPORTED
-#define PNG_USER_LIMITS_SUPPORTED
-#define PNG_USER_MEM_SUPPORTED
-#define PNG_USER_TRANSFORM_INFO_SUPPORTED
-#define PNG_USER_TRANSFORM_PTR_SUPPORTED
-#define PNG_WARNINGS_SUPPORTED
-#define PNG_WRITE_16BIT_SUPPORTED
-#define PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED
-#define PNG_WRITE_BGR_SUPPORTED
-#define PNG_WRITE_bKGD_SUPPORTED
-#define PNG_WRITE_cHRM_SUPPORTED
-#define PNG_WRITE_COMPRESSED_TEXT_SUPPORTED
-#define PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED
-#define PNG_WRITE_FILLER_SUPPORTED
-#define PNG_WRITE_FILTER_SUPPORTED
-#define PNG_WRITE_FLUSH_SUPPORTED
-#define PNG_WRITE_gAMA_SUPPORTED
-#define PNG_WRITE_hIST_SUPPORTED
-#define PNG_WRITE_iCCP_SUPPORTED
-#define PNG_WRITE_INTERLACING_SUPPORTED
-#define PNG_WRITE_INT_FUNCTIONS_SUPPORTED
-#define PNG_WRITE_INVERT_ALPHA_SUPPORTED
-#define PNG_WRITE_INVERT_SUPPORTED
-#define PNG_WRITE_iTXt_SUPPORTED
-#define PNG_WRITE_oFFs_SUPPORTED
-#define PNG_WRITE_OPTIMIZE_CMF_SUPPORTED
-#define PNG_WRITE_PACK_SUPPORTED
-#define PNG_WRITE_PACKSWAP_SUPPORTED
-#define PNG_WRITE_pCAL_SUPPORTED
-#define PNG_WRITE_pHYs_SUPPORTED
-#define PNG_WRITE_sBIT_SUPPORTED
-#define PNG_WRITE_sCAL_SUPPORTED
-#define PNG_WRITE_SHIFT_SUPPORTED
-#define PNG_WRITE_sPLT_SUPPORTED
-#define PNG_WRITE_sRGB_SUPPORTED
-#define PNG_WRITE_SUPPORTED
-#define PNG_WRITE_SWAP_ALPHA_SUPPORTED
-#define PNG_WRITE_SWAP_SUPPORTED
-#define PNG_WRITE_tEXt_SUPPORTED
-#define PNG_WRITE_TEXT_SUPPORTED
-#define PNG_WRITE_tIME_SUPPORTED
-#define PNG_WRITE_TRANSFORMS_SUPPORTED
-#define PNG_WRITE_tRNS_SUPPORTED
-#define PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
-#define PNG_WRITE_USER_TRANSFORM_SUPPORTED
-#define PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
-#define PNG_WRITE_zTXt_SUPPORTED
-#define PNG_zTXt_SUPPORTED
-/* end of options */
-#endif /* PNGLCONF_H */
+ +/* libpng STANDARD API DEFINITION */ + +/* pnglibconf.h - library build configuration */ + +/* libpng version 1.5.4 - last changed on June 22, 2011 */ + +/* Copyright (c) 1998-2011 Glenn Randers-Pehrson */ + +/* This code is released under the libpng license. */ +/* For conditions of distribution and use, see the disclaimer */ +/* and license in png.h */ + +/* pnglibconf.h */ +/* Derived from: scripts/pnglibconf.dfa */ +/* If you edit this file by hand you must obey the rules expressed in */ +/* pnglibconf.dfa with respect to the dependencies between the following */ +/* symbols. It is much better to generate a new file using */ +/* scripts/libpngconf.mak */ + +#ifndef PNGLCONF_H +#define PNGLCONF_H +/* settings */ +#define PNG_API_RULE 0 +#define PNG_CALLOC_SUPPORTED +#define PNG_COST_SHIFT 3 +#define PNG_DEFAULT_READ_MACROS 1 +#define PNG_GAMMA_THRESHOLD_FIXED 5000 +#define PNG_MAX_GAMMA_8 11 +#define PNG_QUANTIZE_BLUE_BITS 5 +#define PNG_QUANTIZE_GREEN_BITS 5 +#define PNG_QUANTIZE_RED_BITS 5 +#define PNG_sCAL_PRECISION 5 +#define PNG_USER_CHUNK_CACHE_MAX 0 +#define PNG_USER_CHUNK_MALLOC_MAX 0 +#define PNG_USER_HEIGHT_MAX 1000000 +#define PNG_USER_WIDTH_MAX 1000000 +#define PNG_WEIGHT_SHIFT 8 +#define PNG_ZBUF_SIZE 8192 +/* end of settings */ +/* options */ +#define PNG_16BIT_SUPPORTED +#define PNG_ALIGN_MEMORY_SUPPORTED +#define PNG_BENIGN_ERRORS_SUPPORTED +#define PNG_bKGD_SUPPORTED +#define PNG_BUILD_GRAYSCALE_PALETTE_SUPPORTED +#define PNG_CHECK_cHRM_SUPPORTED +#define PNG_cHRM_SUPPORTED +#define PNG_CONSOLE_IO_SUPPORTED +#define PNG_CONVERT_tIME_SUPPORTED +#define PNG_EASY_ACCESS_SUPPORTED +/*#undef PNG_ERROR_NUMBERS_SUPPORTED*/ +#define PNG_ERROR_TEXT_SUPPORTED +#define PNG_FIXED_POINT_SUPPORTED +#define PNG_FLOATING_ARITHMETIC_SUPPORTED +#define PNG_FLOATING_POINT_SUPPORTED +#define PNG_gAMA_SUPPORTED +#define PNG_HANDLE_AS_UNKNOWN_SUPPORTED +#define PNG_hIST_SUPPORTED +#define PNG_iCCP_SUPPORTED +#define PNG_INCH_CONVERSIONS_SUPPORTED +#define PNG_INFO_IMAGE_SUPPORTED +#define PNG_IO_STATE_SUPPORTED +#define PNG_iTXt_SUPPORTED +#define PNG_MNG_FEATURES_SUPPORTED +#define PNG_oFFs_SUPPORTED +#define PNG_pCAL_SUPPORTED +#define PNG_pHYs_SUPPORTED +#define PNG_POINTER_INDEXING_SUPPORTED +#define PNG_PROGRESSIVE_READ_SUPPORTED +#define PNG_READ_16BIT_SUPPORTED +#define PNG_READ_ALPHA_MODE_SUPPORTED +#define PNG_READ_ANCILLARY_CHUNKS_SUPPORTED +#define PNG_READ_BACKGROUND_SUPPORTED +#define PNG_READ_BGR_SUPPORTED +#define PNG_READ_bKGD_SUPPORTED +#define PNG_READ_cHRM_SUPPORTED +#define PNG_READ_COMPOSITE_NODIV_SUPPORTED +#define PNG_READ_COMPRESSED_TEXT_SUPPORTED +#define PNG_READ_EXPAND_16_SUPPORTED +#define PNG_READ_EXPAND_SUPPORTED +#define PNG_READ_FILLER_SUPPORTED +#define PNG_READ_gAMA_SUPPORTED +#define PNG_READ_GAMMA_SUPPORTED +#define PNG_READ_GRAY_TO_RGB_SUPPORTED +#define PNG_READ_hIST_SUPPORTED +#define PNG_READ_iCCP_SUPPORTED +#define PNG_READ_INTERLACING_SUPPORTED +#define PNG_READ_INT_FUNCTIONS_SUPPORTED +#define PNG_READ_INVERT_ALPHA_SUPPORTED +#define PNG_READ_INVERT_SUPPORTED +#define PNG_READ_iTXt_SUPPORTED +#define PNG_READ_oFFs_SUPPORTED +#define PNG_READ_OPT_PLTE_SUPPORTED +#define PNG_READ_PACK_SUPPORTED +#define PNG_READ_PACKSWAP_SUPPORTED +#define PNG_READ_pCAL_SUPPORTED +#define PNG_READ_pHYs_SUPPORTED +#define PNG_READ_QUANTIZE_SUPPORTED +#define PNG_READ_RGB_TO_GRAY_SUPPORTED +#define PNG_READ_sBIT_SUPPORTED +#define PNG_READ_SCALE_16_TO_8_SUPPORTED +#define PNG_READ_sCAL_SUPPORTED +#define PNG_READ_SHIFT_SUPPORTED +#define PNG_READ_sPLT_SUPPORTED +#define PNG_READ_sRGB_SUPPORTED +#define PNG_READ_STRIP_16_TO_8_SUPPORTED +#define PNG_READ_STRIP_ALPHA_SUPPORTED +#define PNG_READ_SUPPORTED +#define PNG_READ_SWAP_ALPHA_SUPPORTED +#define PNG_READ_SWAP_SUPPORTED +#define PNG_READ_tEXt_SUPPORTED +#define PNG_READ_TEXT_SUPPORTED +#define PNG_READ_tIME_SUPPORTED +#define PNG_READ_TRANSFORMS_SUPPORTED +#define PNG_READ_tRNS_SUPPORTED +#define PNG_READ_UNKNOWN_CHUNKS_SUPPORTED +#define PNG_READ_USER_CHUNKS_SUPPORTED +#define PNG_READ_USER_TRANSFORM_SUPPORTED +#define PNG_READ_zTXt_SUPPORTED +#define PNG_SAVE_INT_32_SUPPORTED +#define PNG_sBIT_SUPPORTED +#define PNG_sCAL_SUPPORTED +#define PNG_SEQUENTIAL_READ_SUPPORTED +#define PNG_SET_CHUNK_CACHE_LIMIT_SUPPORTED +#define PNG_SET_CHUNK_MALLOC_LIMIT_SUPPORTED +#define PNG_SETJMP_SUPPORTED +#define PNG_SET_USER_LIMITS_SUPPORTED +#define PNG_sPLT_SUPPORTED +#define PNG_sRGB_SUPPORTED +#define PNG_STDIO_SUPPORTED +#define PNG_tEXt_SUPPORTED +#define PNG_TEXT_SUPPORTED +#define PNG_TIME_RFC1123_SUPPORTED +#define PNG_tIME_SUPPORTED +#define PNG_tRNS_SUPPORTED +#define PNG_UNKNOWN_CHUNKS_SUPPORTED +#define PNG_USER_CHUNKS_SUPPORTED +#define PNG_USER_LIMITS_SUPPORTED +#define PNG_USER_MEM_SUPPORTED +#define PNG_USER_TRANSFORM_INFO_SUPPORTED +#define PNG_USER_TRANSFORM_PTR_SUPPORTED +#define PNG_WARNINGS_SUPPORTED +#define PNG_WRITE_16BIT_SUPPORTED +#define PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED +#define PNG_WRITE_BGR_SUPPORTED +#define PNG_WRITE_bKGD_SUPPORTED +#define PNG_WRITE_cHRM_SUPPORTED +#define PNG_WRITE_COMPRESSED_TEXT_SUPPORTED +#define PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED +#define PNG_WRITE_FILLER_SUPPORTED +#define PNG_WRITE_FILTER_SUPPORTED +#define PNG_WRITE_FLUSH_SUPPORTED +#define PNG_WRITE_gAMA_SUPPORTED +#define PNG_WRITE_hIST_SUPPORTED +#define PNG_WRITE_iCCP_SUPPORTED +#define PNG_WRITE_INTERLACING_SUPPORTED +#define PNG_WRITE_INT_FUNCTIONS_SUPPORTED +#define PNG_WRITE_INVERT_ALPHA_SUPPORTED +#define PNG_WRITE_INVERT_SUPPORTED +#define PNG_WRITE_iTXt_SUPPORTED +#define PNG_WRITE_oFFs_SUPPORTED +#define PNG_WRITE_OPTIMIZE_CMF_SUPPORTED +#define PNG_WRITE_PACK_SUPPORTED +#define PNG_WRITE_PACKSWAP_SUPPORTED +#define PNG_WRITE_pCAL_SUPPORTED +#define PNG_WRITE_pHYs_SUPPORTED +#define PNG_WRITE_sBIT_SUPPORTED +#define PNG_WRITE_sCAL_SUPPORTED +#define PNG_WRITE_SHIFT_SUPPORTED +#define PNG_WRITE_sPLT_SUPPORTED +#define PNG_WRITE_sRGB_SUPPORTED +#define PNG_WRITE_SUPPORTED +#define PNG_WRITE_SWAP_ALPHA_SUPPORTED +#define PNG_WRITE_SWAP_SUPPORTED +#define PNG_WRITE_tEXt_SUPPORTED +#define PNG_WRITE_TEXT_SUPPORTED +#define PNG_WRITE_tIME_SUPPORTED +#define PNG_WRITE_TRANSFORMS_SUPPORTED +#define PNG_WRITE_tRNS_SUPPORTED +#define PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED +#define PNG_WRITE_USER_TRANSFORM_SUPPORTED +#define PNG_WRITE_WEIGHTED_FILTER_SUPPORTED +#define PNG_WRITE_zTXt_SUPPORTED +#define PNG_zTXt_SUPPORTED +/* end of options */ +#endif /* PNGLCONF_H */ diff --git a/plugins/FreeImage/Source/LibPNG/pngmem.c b/plugins/FreeImage/Source/LibPNG/pngmem.c index e0b6d17b60..25b5c73546 100644 --- a/plugins/FreeImage/Source/LibPNG/pngmem.c +++ b/plugins/FreeImage/Source/LibPNG/pngmem.c @@ -1,7 +1,7 @@ /* pngmem.c - stub functions for memory allocation
*
- * Last changed in libpng 1.5.4 [July 7, 2011]
+ * Last changed in libpng 1.5.7 [December 15, 2011]
* Copyright (c) 1998-2011 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -56,9 +56,9 @@ png_create_struct_2,(int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr), if (malloc_fn != NULL)
{
png_struct dummy_struct;
- png_structp png_ptr = &dummy_struct;
- png_ptr->mem_ptr=mem_ptr;
- struct_ptr = (*(malloc_fn))(png_ptr, (png_uint_32)size);
+ memset(&dummy_struct, 0, sizeof dummy_struct);
+ dummy_struct.mem_ptr=mem_ptr;
+ struct_ptr = (*(malloc_fn))(&dummy_struct, (png_alloc_size_t)size);
}
else
@@ -90,9 +90,9 @@ png_destroy_struct_2(png_voidp struct_ptr, png_free_ptr free_fn, if (free_fn != NULL)
{
png_struct dummy_struct;
- png_structp png_ptr = &dummy_struct;
- png_ptr->mem_ptr=mem_ptr;
- (*(free_fn))(png_ptr, struct_ptr);
+ memset(&dummy_struct, 0, sizeof dummy_struct);
+ dummy_struct.mem_ptr=mem_ptr;
+ (*(free_fn))(&dummy_struct, struct_ptr);
return;
}
@@ -143,7 +143,7 @@ png_malloc,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED) # ifdef PNG_USER_MEM_SUPPORTED
if (png_ptr->malloc_fn != NULL)
- ret = ((png_voidp)(*(png_ptr->malloc_fn))(png_ptr, (png_size_t)size));
+ ret = ((png_voidp)(*(png_ptr->malloc_fn))(png_ptr, size));
else
ret = (png_malloc_default(png_ptr, size));
diff --git a/plugins/FreeImage/Source/LibPNG/pngpread.c b/plugins/FreeImage/Source/LibPNG/pngpread.c index e19a8c7bca..eda5a6c80f 100644 --- a/plugins/FreeImage/Source/LibPNG/pngpread.c +++ b/plugins/FreeImage/Source/LibPNG/pngpread.c @@ -1,7 +1,7 @@ /* pngpread.c - read a png file in push mode
*
- * Last changed in libpng 1.5.2 [March 31, 2011]
+ * Last changed in libpng 1.5.9 [February 18, 2012]
* Copyright (c) 1998-2011 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -208,61 +208,7 @@ png_push_read_sig(png_structp png_ptr, png_infop info_ptr) void /* PRIVATE */
png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
{
- PNG_IHDR;
- PNG_IDAT;
- PNG_IEND;
- PNG_PLTE;
-#ifdef PNG_READ_bKGD_SUPPORTED
- PNG_bKGD;
-#endif
-#ifdef PNG_READ_cHRM_SUPPORTED
- PNG_cHRM;
-#endif
-#ifdef PNG_READ_gAMA_SUPPORTED
- PNG_gAMA;
-#endif
-#ifdef PNG_READ_hIST_SUPPORTED
- PNG_hIST;
-#endif
-#ifdef PNG_READ_iCCP_SUPPORTED
- PNG_iCCP;
-#endif
-#ifdef PNG_READ_iTXt_SUPPORTED
- PNG_iTXt;
-#endif
-#ifdef PNG_READ_oFFs_SUPPORTED
- PNG_oFFs;
-#endif
-#ifdef PNG_READ_pCAL_SUPPORTED
- PNG_pCAL;
-#endif
-#ifdef PNG_READ_pHYs_SUPPORTED
- PNG_pHYs;
-#endif
-#ifdef PNG_READ_sBIT_SUPPORTED
- PNG_sBIT;
-#endif
-#ifdef PNG_READ_sCAL_SUPPORTED
- PNG_sCAL;
-#endif
-#ifdef PNG_READ_sRGB_SUPPORTED
- PNG_sRGB;
-#endif
-#ifdef PNG_READ_sPLT_SUPPORTED
- PNG_sPLT;
-#endif
-#ifdef PNG_READ_tEXt_SUPPORTED
- PNG_tEXt;
-#endif
-#ifdef PNG_READ_tIME_SUPPORTED
- PNG_tIME;
-#endif
-#ifdef PNG_READ_tRNS_SUPPORTED
- PNG_tRNS;
-#endif
-#ifdef PNG_READ_zTXt_SUPPORTED
- PNG_zTXt;
-#endif
+ png_uint_32 chunk_name;
/* First we make sure we have enough data for the 4 byte chunk name
* and the 4 byte chunk length before proceeding with decoding the
@@ -273,6 +219,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) if (!(png_ptr->mode & PNG_HAVE_CHUNK_HEADER))
{
png_byte chunk_length[4];
+ png_byte chunk_tag[4];
if (png_ptr->buffer_size < 8)
{
@@ -283,16 +230,27 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) png_push_fill_buffer(png_ptr, chunk_length, 4);
png_ptr->push_length = png_get_uint_31(png_ptr, chunk_length);
png_reset_crc(png_ptr);
- png_crc_read(png_ptr, png_ptr->chunk_name, 4);
+ png_crc_read(png_ptr, chunk_tag, 4);
+ png_ptr->chunk_name = PNG_CHUNK_FROM_STRING(chunk_tag);
png_check_chunk_name(png_ptr, png_ptr->chunk_name);
png_ptr->mode |= PNG_HAVE_CHUNK_HEADER;
}
- if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
+ chunk_name = png_ptr->chunk_name;
+
+ if (chunk_name == png_IDAT)
+ {
+ /* This is here above the if/else case statement below because if the
+ * unknown handling marks 'IDAT' as unknown then the IDAT handling case is
+ * completely skipped.
+ *
+ * TODO: there must be a better way of doing this.
+ */
if (png_ptr->mode & PNG_AFTER_IDAT)
png_ptr->mode |= PNG_HAVE_CHUNK_AFTER_IDAT;
+ }
- if (!png_memcmp(png_ptr->chunk_name, png_IHDR, 4))
+ if (chunk_name == png_IHDR)
{
if (png_ptr->push_length != 13)
png_error(png_ptr, "Invalid IHDR length");
@@ -306,7 +264,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) png_handle_IHDR(png_ptr, info_ptr, png_ptr->push_length);
}
- else if (!png_memcmp(png_ptr->chunk_name, png_IEND, 4))
+ else if (chunk_name == png_IEND)
{
if (png_ptr->push_length + 4 > png_ptr->buffer_size)
{
@@ -321,7 +279,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) }
#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
- else if (png_handle_as_unknown(png_ptr, png_ptr->chunk_name))
+ else if (png_chunk_unknown_handling(png_ptr, chunk_name))
{
if (png_ptr->push_length + 4 > png_ptr->buffer_size)
{
@@ -329,15 +287,15 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) return;
}
- if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
+ if (chunk_name == png_IDAT)
png_ptr->mode |= PNG_HAVE_IDAT;
png_handle_unknown(png_ptr, info_ptr, png_ptr->push_length);
- if (!png_memcmp(png_ptr->chunk_name, png_PLTE, 4))
+ if (chunk_name == png_PLTE)
png_ptr->mode |= PNG_HAVE_PLTE;
- else if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
+ else if (chunk_name == png_IDAT)
{
if (!(png_ptr->mode & PNG_HAVE_IHDR))
png_error(png_ptr, "Missing IHDR before IDAT");
@@ -349,7 +307,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) }
#endif
- else if (!png_memcmp(png_ptr->chunk_name, png_PLTE, 4))
+ else if (chunk_name == png_PLTE)
{
if (png_ptr->push_length + 4 > png_ptr->buffer_size)
{
@@ -359,7 +317,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) png_handle_PLTE(png_ptr, info_ptr, png_ptr->push_length);
}
- else if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
+ else if (chunk_name == png_IDAT)
{
/* If we reach an IDAT chunk, this means we have read all of the
* header chunks, and we can start reading the image (or if this
@@ -395,7 +353,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) }
#ifdef PNG_READ_gAMA_SUPPORTED
- else if (!png_memcmp(png_ptr->chunk_name, png_gAMA, 4))
+ else if (png_ptr->chunk_name == png_gAMA)
{
if (png_ptr->push_length + 4 > png_ptr->buffer_size)
{
@@ -408,7 +366,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) #endif
#ifdef PNG_READ_sBIT_SUPPORTED
- else if (!png_memcmp(png_ptr->chunk_name, png_sBIT, 4))
+ else if (png_ptr->chunk_name == png_sBIT)
{
if (png_ptr->push_length + 4 > png_ptr->buffer_size)
{
@@ -421,7 +379,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) #endif
#ifdef PNG_READ_cHRM_SUPPORTED
- else if (!png_memcmp(png_ptr->chunk_name, png_cHRM, 4))
+ else if (png_ptr->chunk_name == png_cHRM)
{
if (png_ptr->push_length + 4 > png_ptr->buffer_size)
{
@@ -434,7 +392,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) #endif
#ifdef PNG_READ_sRGB_SUPPORTED
- else if (!png_memcmp(png_ptr->chunk_name, png_sRGB, 4))
+ else if (chunk_name == png_sRGB)
{
if (png_ptr->push_length + 4 > png_ptr->buffer_size)
{
@@ -447,7 +405,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) #endif
#ifdef PNG_READ_iCCP_SUPPORTED
- else if (!png_memcmp(png_ptr->chunk_name, png_iCCP, 4))
+ else if (png_ptr->chunk_name == png_iCCP)
{
if (png_ptr->push_length + 4 > png_ptr->buffer_size)
{
@@ -460,7 +418,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) #endif
#ifdef PNG_READ_sPLT_SUPPORTED
- else if (!png_memcmp(png_ptr->chunk_name, png_sPLT, 4))
+ else if (chunk_name == png_sPLT)
{
if (png_ptr->push_length + 4 > png_ptr->buffer_size)
{
@@ -473,7 +431,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) #endif
#ifdef PNG_READ_tRNS_SUPPORTED
- else if (!png_memcmp(png_ptr->chunk_name, png_tRNS, 4))
+ else if (chunk_name == png_tRNS)
{
if (png_ptr->push_length + 4 > png_ptr->buffer_size)
{
@@ -486,7 +444,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) #endif
#ifdef PNG_READ_bKGD_SUPPORTED
- else if (!png_memcmp(png_ptr->chunk_name, png_bKGD, 4))
+ else if (chunk_name == png_bKGD)
{
if (png_ptr->push_length + 4 > png_ptr->buffer_size)
{
@@ -499,7 +457,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) #endif
#ifdef PNG_READ_hIST_SUPPORTED
- else if (!png_memcmp(png_ptr->chunk_name, png_hIST, 4))
+ else if (chunk_name == png_hIST)
{
if (png_ptr->push_length + 4 > png_ptr->buffer_size)
{
@@ -512,7 +470,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) #endif
#ifdef PNG_READ_pHYs_SUPPORTED
- else if (!png_memcmp(png_ptr->chunk_name, png_pHYs, 4))
+ else if (chunk_name == png_pHYs)
{
if (png_ptr->push_length + 4 > png_ptr->buffer_size)
{
@@ -525,7 +483,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) #endif
#ifdef PNG_READ_oFFs_SUPPORTED
- else if (!png_memcmp(png_ptr->chunk_name, png_oFFs, 4))
+ else if (chunk_name == png_oFFs)
{
if (png_ptr->push_length + 4 > png_ptr->buffer_size)
{
@@ -538,7 +496,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) #endif
#ifdef PNG_READ_pCAL_SUPPORTED
- else if (!png_memcmp(png_ptr->chunk_name, png_pCAL, 4))
+ else if (chunk_name == png_pCAL)
{
if (png_ptr->push_length + 4 > png_ptr->buffer_size)
{
@@ -551,7 +509,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) #endif
#ifdef PNG_READ_sCAL_SUPPORTED
- else if (!png_memcmp(png_ptr->chunk_name, png_sCAL, 4))
+ else if (chunk_name == png_sCAL)
{
if (png_ptr->push_length + 4 > png_ptr->buffer_size)
{
@@ -564,7 +522,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) #endif
#ifdef PNG_READ_tIME_SUPPORTED
- else if (!png_memcmp(png_ptr->chunk_name, png_tIME, 4))
+ else if (chunk_name == png_tIME)
{
if (png_ptr->push_length + 4 > png_ptr->buffer_size)
{
@@ -577,7 +535,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) #endif
#ifdef PNG_READ_tEXt_SUPPORTED
- else if (!png_memcmp(png_ptr->chunk_name, png_tEXt, 4))
+ else if (chunk_name == png_tEXt)
{
if (png_ptr->push_length + 4 > png_ptr->buffer_size)
{
@@ -590,7 +548,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) #endif
#ifdef PNG_READ_zTXt_SUPPORTED
- else if (!png_memcmp(png_ptr->chunk_name, png_zTXt, 4))
+ else if (chunk_name == png_zTXt)
{
if (png_ptr->push_length + 4 > png_ptr->buffer_size)
{
@@ -603,7 +561,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) #endif
#ifdef PNG_READ_iTXt_SUPPORTED
- else if (!png_memcmp(png_ptr->chunk_name, png_iTXt, 4))
+ else if (chunk_name == png_iTXt)
{
if (png_ptr->push_length + 4 > png_ptr->buffer_size)
{
@@ -772,8 +730,7 @@ png_push_save_buffer(png_structp png_ptr) new_max = png_ptr->save_buffer_size + png_ptr->current_buffer_size + 256;
old_buffer = png_ptr->save_buffer;
- png_ptr->save_buffer = (png_bytep)png_malloc_warn(png_ptr,
- (png_size_t)new_max);
+ png_ptr->save_buffer = (png_bytep)png_malloc_warn(png_ptr, new_max);
if (png_ptr->save_buffer == NULL)
{
@@ -809,11 +766,12 @@ png_push_restore_buffer(png_structp png_ptr, png_bytep buffer, void /* PRIVATE */
png_push_read_IDAT(png_structp png_ptr)
{
- PNG_IDAT;
if (!(png_ptr->mode & PNG_HAVE_CHUNK_HEADER))
{
png_byte chunk_length[4];
+ png_byte chunk_tag[4];
+ /* TODO: this code can be commoned up with the same code in push_read */
if (png_ptr->buffer_size < 8)
{
png_push_save_buffer(png_ptr);
@@ -823,10 +781,11 @@ png_push_read_IDAT(png_structp png_ptr) png_push_fill_buffer(png_ptr, chunk_length, 4);
png_ptr->push_length = png_get_uint_31(png_ptr, chunk_length);
png_reset_crc(png_ptr);
- png_crc_read(png_ptr, png_ptr->chunk_name, 4);
+ png_crc_read(png_ptr, chunk_tag, 4);
+ png_ptr->chunk_name = PNG_CHUNK_FROM_STRING(chunk_tag);
png_ptr->mode |= PNG_HAVE_CHUNK_HEADER;
- if (png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
+ if (png_ptr->chunk_name != png_IDAT)
{
png_ptr->process_mode = PNG_READ_CHUNK_MODE;
@@ -838,6 +797,7 @@ png_push_read_IDAT(png_structp png_ptr) png_ptr->idat_size = png_ptr->push_length;
}
+
if (png_ptr->idat_size && png_ptr->save_buffer_size)
{
png_size_t save_size = png_ptr->save_buffer_size;
@@ -1011,36 +971,56 @@ png_process_IDAT_data(png_structp png_ptr, png_bytep buffer, void /* PRIVATE */
png_push_process_row(png_structp png_ptr)
{
- png_ptr->row_info.color_type = png_ptr->color_type;
- png_ptr->row_info.width = png_ptr->iwidth;
- png_ptr->row_info.channels = png_ptr->channels;
- png_ptr->row_info.bit_depth = png_ptr->bit_depth;
- png_ptr->row_info.pixel_depth = png_ptr->pixel_depth;
+ /* 1.5.6: row_info moved out of png_struct to a local here. */
+ png_row_info row_info;
- png_ptr->row_info.rowbytes = PNG_ROWBYTES(png_ptr->row_info.pixel_depth,
- png_ptr->row_info.width);
+ row_info.width = png_ptr->iwidth; /* NOTE: width of current interlaced row */
+ row_info.color_type = png_ptr->color_type;
+ row_info.bit_depth = png_ptr->bit_depth;
+ row_info.channels = png_ptr->channels;
+ row_info.pixel_depth = png_ptr->pixel_depth;
+ row_info.rowbytes = PNG_ROWBYTES(row_info.pixel_depth, row_info.width);
- png_read_filter_row(png_ptr, &(png_ptr->row_info),
- png_ptr->row_buf + 1, png_ptr->prev_row + 1,
- (int)(png_ptr->row_buf[0]));
+ if (png_ptr->row_buf[0] > PNG_FILTER_VALUE_NONE)
+ {
+ if (png_ptr->row_buf[0] < PNG_FILTER_VALUE_LAST)
+ png_read_filter_row(png_ptr, &row_info, png_ptr->row_buf + 1,
+ png_ptr->prev_row + 1, png_ptr->row_buf[0]);
+ else
+ png_error(png_ptr, "bad adaptive filter value");
+ }
- png_memcpy(png_ptr->prev_row, png_ptr->row_buf, png_ptr->rowbytes + 1);
+ /* libpng 1.5.6: the following line was copying png_ptr->rowbytes before
+ * 1.5.6, while the buffer really is this big in current versions of libpng
+ * it may not be in the future, so this was changed just to copy the
+ * interlaced row count:
+ */
+ png_memcpy(png_ptr->prev_row, png_ptr->row_buf, row_info.rowbytes + 1);
#ifdef PNG_READ_TRANSFORMS_SUPPORTED
if (png_ptr->transformations)
- png_do_read_transformations(png_ptr);
+ png_do_read_transformations(png_ptr, &row_info);
#endif
+ /* The transformed pixel depth should match the depth now in row_info. */
+ if (png_ptr->transformed_pixel_depth == 0)
+ {
+ png_ptr->transformed_pixel_depth = row_info.pixel_depth;
+ if (row_info.pixel_depth > png_ptr->maximum_pixel_depth)
+ png_error(png_ptr, "progressive row overflow");
+ }
+
+ else if (png_ptr->transformed_pixel_depth != row_info.pixel_depth)
+ png_error(png_ptr, "internal progressive row size calculation error");
+
+
#ifdef PNG_READ_INTERLACING_SUPPORTED
/* Blow up interlaced rows to full size */
if (png_ptr->interlaced && (png_ptr->transformations & PNG_INTERLACE))
{
if (png_ptr->pass < 6)
-/* old interface (pre-1.0.9):
- png_do_read_interlace(&(png_ptr->row_info),
- png_ptr->row_buf + 1, png_ptr->pass, png_ptr->transformations);
- */
- png_do_read_interlace(png_ptr);
+ png_do_read_interlace(&row_info, png_ptr->row_buf + 1, png_ptr->pass,
+ png_ptr->transformations);
switch (png_ptr->pass)
{
@@ -1220,24 +1200,26 @@ png_push_process_row(png_structp png_ptr) void /* PRIVATE */
png_read_push_finish_row(png_structp png_ptr)
{
+#ifdef PNG_READ_INTERLACING_SUPPORTED
/* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */
/* Start of interlace block */
- PNG_CONST int FARDATA png_pass_start[] = {0, 4, 0, 2, 0, 1, 0};
+ static PNG_CONST png_byte FARDATA png_pass_start[] = {0, 4, 0, 2, 0, 1, 0};
/* Offset to next interlace block */
- PNG_CONST int FARDATA png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1};
+ static PNG_CONST png_byte FARDATA png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1};
/* Start of interlace block in the y direction */
- PNG_CONST int FARDATA png_pass_ystart[] = {0, 0, 4, 0, 2, 0, 1};
+ static PNG_CONST png_byte FARDATA png_pass_ystart[] = {0, 0, 4, 0, 2, 0, 1};
/* Offset to next interlace block in the y direction */
- PNG_CONST int FARDATA png_pass_yinc[] = {8, 8, 8, 4, 4, 2, 2};
+ static PNG_CONST png_byte FARDATA png_pass_yinc[] = {8, 8, 8, 4, 4, 2, 2};
/* Height of interlace block. This is not currently used - if you need
* it, uncomment it here and in png.h
- PNG_CONST int FARDATA png_pass_height[] = {8, 8, 4, 4, 2, 2, 1};
+ static PNG_CONST png_byte FARDATA png_pass_height[] = {8, 8, 4, 4, 2, 2, 1};
*/
+#endif
png_ptr->row_number++;
if (png_ptr->row_number < png_ptr->num_rows)
@@ -1304,8 +1286,7 @@ png_push_handle_tEXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 }
#endif
- png_ptr->current_text = (png_charp)png_malloc(png_ptr,
- (png_size_t)(length + 1));
+ png_ptr->current_text = (png_charp)png_malloc(png_ptr, length + 1);
png_ptr->current_text[length] = '\0';
png_ptr->current_text_ptr = png_ptr->current_text;
png_ptr->current_text_size = (png_size_t)length;
@@ -1403,8 +1384,7 @@ png_push_handle_zTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 }
#endif
- png_ptr->current_text = (png_charp)png_malloc(png_ptr,
- (png_size_t)(length + 1));
+ png_ptr->current_text = (png_charp)png_malloc(png_ptr, length + 1);
png_ptr->current_text[length] = '\0';
png_ptr->current_text_ptr = png_ptr->current_text;
png_ptr->current_text_size = (png_size_t)length;
@@ -1605,8 +1585,7 @@ png_push_handle_iTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 }
#endif
- png_ptr->current_text = (png_charp)png_malloc(png_ptr,
- (png_size_t)(length + 1));
+ png_ptr->current_text = (png_charp)png_malloc(png_ptr, length + 1);
png_ptr->current_text[length] = '\0';
png_ptr->current_text_ptr = png_ptr->current_text;
png_ptr->current_text_size = (png_size_t)length;
@@ -1714,11 +1693,12 @@ png_push_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
{
png_uint_32 skip = 0;
+ png_uint_32 chunk_name = png_ptr->chunk_name;
- if (!(png_ptr->chunk_name[0] & 0x20))
+ if (PNG_CHUNK_CRITICAL(chunk_name))
{
#ifdef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
- if (png_handle_as_unknown(png_ptr, png_ptr->chunk_name) !=
+ if (png_chunk_unknown_handling(png_ptr, chunk_name) !=
PNG_HANDLE_CHUNK_ALWAYS
#ifdef PNG_READ_USER_CHUNKS_SUPPORTED
&& png_ptr->read_user_chunk_fn == NULL
@@ -1731,23 +1711,26 @@ png_push_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 }
#ifdef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
+ /* TODO: the code below is apparently just using the
+ * png_struct::unknown_chunk member as a temporarily variable, it should be
+ * possible to eliminate both it and the temporary buffer.
+ */
if (png_ptr->flags & PNG_FLAG_KEEP_UNKNOWN_CHUNKS)
{
#ifdef PNG_MAX_MALLOC_64K
- if (length > (png_uint_32)65535L)
+ if (length > 65535)
{
png_warning(png_ptr, "unknown chunk too large to fit in memory");
- skip = length - (png_uint_32)65535L;
- length = (png_uint_32)65535L;
+ skip = length - 65535;
+ length = 65535;
}
#endif
- png_memcpy((png_charp)png_ptr->unknown_chunk.name,
- (png_charp)png_ptr->chunk_name,
- png_sizeof(png_ptr->unknown_chunk.name));
- png_ptr->unknown_chunk.name[png_sizeof(png_ptr->unknown_chunk.name) - 1]
- = '\0';
+ /* This is just a record for the user; libpng doesn't use the character
+ * form of the name.
+ */
+ PNG_CSTRING_FROM_CHUNK(png_ptr->unknown_chunk.name, png_ptr->chunk_name);
- png_ptr->unknown_chunk.size = (png_size_t)length;
+ png_ptr->unknown_chunk.size = length;
if (length == 0)
png_ptr->unknown_chunk.data = NULL;
@@ -1755,8 +1738,9 @@ png_push_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 else
{
png_ptr->unknown_chunk.data = (png_bytep)png_malloc(png_ptr,
- (png_size_t)length);
- png_crc_read(png_ptr, (png_bytep)png_ptr->unknown_chunk.data, length);
+ png_ptr->unknown_chunk.size);
+ png_crc_read(png_ptr, (png_bytep)png_ptr->unknown_chunk.data,
+ png_ptr->unknown_chunk.size);
}
#ifdef PNG_READ_USER_CHUNKS_SUPPORTED
@@ -1772,8 +1756,8 @@ png_push_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 if (ret == 0)
{
- if (!(png_ptr->chunk_name[0] & 0x20))
- if (png_handle_as_unknown(png_ptr, png_ptr->chunk_name) !=
+ if (PNG_CHUNK_CRITICAL(png_ptr->chunk_name))
+ if (png_chunk_unknown_handling(png_ptr, chunk_name) !=
PNG_HANDLE_CHUNK_ALWAYS)
png_chunk_error(png_ptr, "unknown critical chunk");
png_set_unknown_chunks(png_ptr, info_ptr,
@@ -1816,19 +1800,22 @@ png_push_have_row(png_structp png_ptr, png_bytep row) (int)png_ptr->pass);
}
+#ifdef PNG_READ_INTERLACING_SUPPORTED
void PNGAPI
png_progressive_combine_row (png_structp png_ptr, png_bytep old_row,
png_const_bytep new_row)
{
- PNG_CONST int FARDATA png_pass_dsp_mask[7] =
- {0xff, 0x0f, 0xff, 0x33, 0xff, 0x55, 0xff};
-
if (png_ptr == NULL)
return;
- if (new_row != NULL) /* new_row must == png_ptr->row_buf here. */
- png_combine_row(png_ptr, old_row, png_pass_dsp_mask[png_ptr->pass]);
+ /* new_row is a flag here - if it is NULL then the app callback was called
+ * from an empty row (see the calls to png_struct::row_fn below), otherwise
+ * it must be png_ptr->row_buf+1
+ */
+ if (new_row != NULL)
+ png_combine_row(png_ptr, old_row, 1/*display*/);
}
+#endif /* PNG_READ_INTERLACING_SUPPORTED */
void PNGAPI
png_set_progressive_read_fn(png_structp png_ptr, png_voidp progressive_ptr,
diff --git a/plugins/FreeImage/Source/LibPNG/pngpriv.h b/plugins/FreeImage/Source/LibPNG/pngpriv.h index b65006eea0..5f751de23d 100644 --- a/plugins/FreeImage/Source/LibPNG/pngpriv.h +++ b/plugins/FreeImage/Source/LibPNG/pngpriv.h @@ -6,7 +6,7 @@ * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
- * Last changed in libpng 1.5.4 [July 7, 2011]
+ * Last changed in libpng 1.5.7 [December 15, 2011]
*
* This code is released under the libpng license.
* For conditions of distribution and use, see the disclaimer
@@ -44,7 +44,11 @@ */
#include <stdlib.h>
-#define PNGLIB_BUILD
+/* This is used to find 'offsetof', used below for alignment tests. */
+#include <stddef.h>
+
+#define PNGLIB_BUILD /*libpng is being built, not used*/
+
#ifdef PNG_USER_CONFIG
# include "pngusr.h"
/* These should have been defined in pngusr.h */
@@ -55,10 +59,80 @@ # define PNG_USER_DLLFNAME_POSTFIX "Cb"
# endif
#endif
+
+/* Is this a build of a DLL where compilation of the object modules requires
+ * different preprocessor settings to those required for a simple library? If
+ * so PNG_BUILD_DLL must be set.
+ *
+ * If libpng is used inside a DLL but that DLL does not export the libpng APIs
+ * PNG_BUILD_DLL must not be set. To avoid the code below kicking in build a
+ * static library of libpng then link the DLL against that.
+ */
+#ifndef PNG_BUILD_DLL
+# ifdef DLL_EXPORT
+ /* This is set by libtool when files are compiled for a DLL; libtool
+ * always compiles twice, even on systems where it isn't necessary. Set
+ * PNG_BUILD_DLL in case it is necessary:
+ */
+# define PNG_BUILD_DLL
+# else
+# ifdef _WINDLL
+ /* This is set by the Microsoft Visual Studio IDE in projects that
+ * build a DLL. It can't easily be removed from those projects (it
+ * isn't visible in the Visual Studio UI) so it is a fairly reliable
+ * indication that PNG_IMPEXP needs to be set to the DLL export
+ * attributes.
+ */
+# define PNG_BUILD_DLL
+# else
+# ifdef __DLL__
+ /* This is set by the Borland C system when compiling for a DLL
+ * (as above.)
+ */
+# define PNG_BUILD_DLL
+# else
+ /* Add additional compiler cases here. */
+# endif
+# endif
+# endif
+#endif /* Setting PNG_BUILD_DLL if required */
+
+/* See pngconf.h for more details: the builder of the library may set this on
+ * the command line to the right thing for the specific compilation system or it
+ * may be automagically set above (at present we know of no system where it does
+ * need to be set on the command line.)
+ *
+ * PNG_IMPEXP must be set here when building the library to prevent pngconf.h
+ * setting it to the "import" setting for a DLL build.
+ */
+#ifndef PNG_IMPEXP
+# ifdef PNG_BUILD_DLL
+# define PNG_IMPEXP PNG_DLL_EXPORT
+# else
+ /* Not building a DLL, or the DLL doesn't require specific export
+ * definitions.
+ */
+# define PNG_IMPEXP
+# endif
+#endif
+
+/* No warnings for private or deprecated functions in the build: */
+#ifndef PNG_DEPRECATED
+# define PNG_DEPRECATED
+#endif
+#ifndef PNG_PRIVATE
+# define PNG_PRIVATE
+#endif
+
#include "png.h"
#include "pnginfo.h"
#include "pngstruct.h"
+/* pngconf.h does not set PNG_DLL_EXPORT unless it is required, so: */
+#ifndef PNG_DLL_EXPORT
+# define PNG_DLL_EXPORT
+#endif
+
/* This is used for 16 bit gamma tables - only the top level pointers are const,
* this could be changed:
*/
@@ -122,6 +196,23 @@ typedef PNG_CONST png_uint_16p FAR * png_const_uint_16pp; # define PNG_STATIC static
#endif
+/* C99 restrict is used where possible, to do this 'restrict' is defined as
+ * empty if we can't be sure it is supported. configure builds have already
+ * done this work.
+ */
+#ifdef PNG_CONFIGURE_LIBPNG
+# define PNG_RESTRICT restrict
+#else
+ /* Modern compilers support restrict, but assume not for anything not
+ * recognized here:
+ */
+# if defined __GNUC__ || defined _MSC_VER || defined __WATCOMC__
+# define PNG_RESTRICT restrict
+# else
+# define PNG_RESTRICT
+# endif
+#endif
+
/* If warnings or errors are turned off the code is disabled or redirected here.
* From 1.5.4 functions have been added to allow very limited formatting of
* error and warning messages - this code will also be disabled here.
@@ -143,15 +234,28 @@ typedef PNG_CONST png_uint_16p FAR * png_const_uint_16pp; # define png_fixed_error(s1,s2) png_err(s1)
#endif
+/* C allows up-casts from (void*) to any pointer and (const void*) to any
+ * pointer to a const object. C++ regards this as a type error and requires an
+ * explicit, static, cast and provides the static_cast<> rune to ensure that
+ * const is not cast away.
+ */
+#ifdef __cplusplus
+# define png_voidcast(type, value) static_cast<type>(value)
+#else
+# define png_voidcast(type, value) (value)
+#endif /* __cplusplus */
+
#ifndef PNG_EXTERN
/* The functions exported by PNG_EXTERN are internal functions, which
* aren't usually used outside the library (as far as I know), so it is
* debatable if they should be exported at all. In the future, when it
* is possible to have run-time registry of chunk-handling functions,
* some of these might be made available again.
-# define PNG_EXTERN extern
+ *
+ * 1.5.7: turned the use of 'extern' back on, since it is localized to pngpriv.h
+ * it should be safe now (it is unclear why it was turned off.)
*/
-# define PNG_EXTERN
+# define PNG_EXTERN extern
#endif
/* Some fixed point APIs are still required even if not exported because
@@ -250,6 +354,52 @@ typedef PNG_CONST png_uint_16p FAR * png_const_uint_16pp; # define png_memset memset
# endif
#endif
+
+/* These macros may need to be architecture dependent. */
+#define PNG_ALIGN_NONE 0 /* do not use data alignment */
+#define PNG_ALIGN_ALWAYS 1 /* assume unaligned accesses are OK */
+#ifdef offsetof
+# define PNG_ALIGN_OFFSET 2 /* use offsetof to determine alignment */
+#else
+# define PNG_ALIGN_OFFSET -1 /* prevent the use of this */
+#endif
+#define PNG_ALIGN_SIZE 3 /* use sizeof to determine alignment */
+
+#ifndef PNG_ALIGN_TYPE
+ /* Default to using aligned access optimizations and requiring alignment to a
+ * multiple of the data type size. Override in a compiler specific fashion
+ * if necessary by inserting tests here:
+ */
+# define PNG_ALIGN_TYPE PNG_ALIGN_SIZE
+#endif
+
+#if PNG_ALIGN_TYPE == PNG_ALIGN_SIZE
+ /* This is used because in some compiler implementations non-aligned
+ * structure members are supported, so the offsetof approach below fails.
+ * Set PNG_ALIGN_TO_SIZE=0 for compiler combinations where unaligned access
+ * is good for performance. Do not do this unless you have tested the result
+ * and understand it.
+ */
+# define png_alignof(type) (sizeof (type))
+#else
+# if PNG_ALIGN_TYPE == PNG_ALIGN_OFFSET
+# define png_alignof(type) offsetof(struct{char c; type t;}, t)
+# else
+# if PNG_ALIGN_TYPE == PNG_ALIGN_ALWAYS
+# define png_alignof(type) (1)
+# endif
+ /* Else leave png_alignof undefined to prevent use thereof */
+# endif
+#endif
+
+/* This implicitly assumes alignment is always to a power of 2. */
+#ifdef png_alignof
+# define png_isaligned(ptr, type)\
+ ((((const char*)ptr-(const char*)0) & (png_alignof(type)-1)) == 0)
+#else
+# define png_isaligned(ptr, type) 0
+#endif
+
/* End of memory model/platform independent support */
/* End of 1.5.0beta36 move from pngconf.h */
@@ -293,24 +443,23 @@ typedef PNG_CONST png_uint_16p FAR * png_const_uint_16pp; #define PNG_EXPAND 0x1000
#define PNG_GAMMA 0x2000
#define PNG_GRAY_TO_RGB 0x4000
-#define PNG_FILLER 0x8000L
-#define PNG_PACKSWAP 0x10000L
-#define PNG_SWAP_ALPHA 0x20000L
-#define PNG_STRIP_ALPHA 0x40000L
-#define PNG_INVERT_ALPHA 0x80000L
-#define PNG_USER_TRANSFORM 0x100000L
-#define PNG_RGB_TO_GRAY_ERR 0x200000L
-#define PNG_RGB_TO_GRAY_WARN 0x400000L
-#define PNG_RGB_TO_GRAY 0x600000L /* two bits, RGB_TO_GRAY_ERR|WARN */
-#define PNG_ENCODE_ALPHA 0x800000L /* Added to libpng-1.5.4 */
-#define PNG_ADD_ALPHA 0x1000000L /* Added to libpng-1.2.7 */
-#define PNG_EXPAND_tRNS 0x2000000L /* Added to libpng-1.2.9 */
-#define PNG_SCALE_16_TO_8 0x4000000L /* Added to libpng-1.5.4 */
- /* 0x8000000L unused */
- /* 0x10000000L unused */
- /* 0x20000000L unused */
- /* 0x40000000L unused */
-
+#define PNG_FILLER 0x8000
+#define PNG_PACKSWAP 0x10000
+#define PNG_SWAP_ALPHA 0x20000
+#define PNG_STRIP_ALPHA 0x40000
+#define PNG_INVERT_ALPHA 0x80000
+#define PNG_USER_TRANSFORM 0x100000
+#define PNG_RGB_TO_GRAY_ERR 0x200000
+#define PNG_RGB_TO_GRAY_WARN 0x400000
+#define PNG_RGB_TO_GRAY 0x600000 /* two bits, RGB_TO_GRAY_ERR|WARN */
+#define PNG_ENCODE_ALPHA 0x800000 /* Added to libpng-1.5.4 */
+#define PNG_ADD_ALPHA 0x1000000 /* Added to libpng-1.2.7 */
+#define PNG_EXPAND_tRNS 0x2000000 /* Added to libpng-1.2.9 */
+#define PNG_SCALE_16_TO_8 0x4000000 /* Added to libpng-1.5.4 */
+ /* 0x8000000 unused */
+ /* 0x10000000 unused */
+ /* 0x20000000 unused */
+ /* 0x40000000 unused */
/* Flags for png_create_struct */
#define PNG_STRUCT_PNG 0x0001
#define PNG_STRUCT_INFO 0x0002
@@ -335,22 +484,22 @@ typedef PNG_CONST png_uint_16p FAR * png_const_uint_16pp; #define PNG_FLAG_ASSUME_sRGB 0x1000 /* Added to libpng-1.5.4 */
#define PNG_FLAG_OPTIMIZE_ALPHA 0x2000 /* Added to libpng-1.5.4 */
#define PNG_FLAG_DETECT_UNINITIALIZED 0x4000 /* Added to libpng-1.5.4 */
-#define PNG_FLAG_KEEP_UNKNOWN_CHUNKS 0x8000L
-#define PNG_FLAG_KEEP_UNSAFE_CHUNKS 0x10000L
-#define PNG_FLAG_LIBRARY_MISMATCH 0x20000L
-#define PNG_FLAG_STRIP_ERROR_NUMBERS 0x40000L
-#define PNG_FLAG_STRIP_ERROR_TEXT 0x80000L
-#define PNG_FLAG_MALLOC_NULL_MEM_OK 0x100000L
- /* 0x200000L unused */
- /* 0x400000L unused */
-#define PNG_FLAG_BENIGN_ERRORS_WARN 0x800000L /* Added to libpng-1.4.0 */
-#define PNG_FLAG_ZTXT_CUSTOM_STRATEGY 0x1000000L /* 5 lines added */
-#define PNG_FLAG_ZTXT_CUSTOM_LEVEL 0x2000000L /* to libpng-1.5.4 */
-#define PNG_FLAG_ZTXT_CUSTOM_MEM_LEVEL 0x4000000L
-#define PNG_FLAG_ZTXT_CUSTOM_WINDOW_BITS 0x8000000L
-#define PNG_FLAG_ZTXT_CUSTOM_METHOD 0x10000000L
- /* 0x20000000L unused */
- /* 0x40000000L unused */
+#define PNG_FLAG_KEEP_UNKNOWN_CHUNKS 0x8000
+#define PNG_FLAG_KEEP_UNSAFE_CHUNKS 0x10000
+#define PNG_FLAG_LIBRARY_MISMATCH 0x20000
+#define PNG_FLAG_STRIP_ERROR_NUMBERS 0x40000
+#define PNG_FLAG_STRIP_ERROR_TEXT 0x80000
+#define PNG_FLAG_MALLOC_NULL_MEM_OK 0x100000
+ /* 0x200000 unused */
+ /* 0x400000 unused */
+#define PNG_FLAG_BENIGN_ERRORS_WARN 0x800000 /* Added to libpng-1.4.0 */
+#define PNG_FLAG_ZTXT_CUSTOM_STRATEGY 0x1000000 /* 5 lines added */
+#define PNG_FLAG_ZTXT_CUSTOM_LEVEL 0x2000000 /* to libpng-1.5.4 */
+#define PNG_FLAG_ZTXT_CUSTOM_MEM_LEVEL 0x4000000
+#define PNG_FLAG_ZTXT_CUSTOM_WINDOW_BITS 0x8000000
+#define PNG_FLAG_ZTXT_CUSTOM_METHOD 0x10000000
+ /* 0x20000000 unused */
+ /* 0x40000000 unused */
#define PNG_FLAG_CRC_ANCILLARY_MASK (PNG_FLAG_CRC_ANCILLARY_USE | \
PNG_FLAG_CRC_ANCILLARY_NOWARN)
@@ -432,32 +581,70 @@ PNG_EXTERN png_fixed_point png_fixed PNGARG((png_structp png_ptr, double fp, #endif
#endif
-/* Constant strings for known chunk types. If you need to add a chunk,
- * define the name here, and add an invocation of the macro wherever it's
- * needed.
+/* Constants for known chunk types. If you need to add a chunk, define the name
+ * here. For historical reasons these constants have the form png_<name>; i.e.
+ * the prefix is lower case. Please use decimal values as the parameters to
+ * match the ISO PNG specification and to avoid relying on the C locale
+ * interpretation of character values.
+ *
+ * Prior to 1.5.6 these constants were strings, as of 1.5.6 png_uint_32 values
+ * are computed and a new macro (PNG_STRING_FROM_CHUNK) added to allow a string
+ * to be generated if required.
+ *
+ * PNG_32b correctly produces a value shifted by up to 24 bits, even on
+ * architectures where (int) is only 16 bits.
*/
-#define PNG_IHDR PNG_CONST png_byte png_IHDR[5] = { 73, 72, 68, 82, '\0'}
-#define PNG_IDAT PNG_CONST png_byte png_IDAT[5] = { 73, 68, 65, 84, '\0'}
-#define PNG_IEND PNG_CONST png_byte png_IEND[5] = { 73, 69, 78, 68, '\0'}
-#define PNG_PLTE PNG_CONST png_byte png_PLTE[5] = { 80, 76, 84, 69, '\0'}
-#define PNG_bKGD PNG_CONST png_byte png_bKGD[5] = { 98, 75, 71, 68, '\0'}
-#define PNG_cHRM PNG_CONST png_byte png_cHRM[5] = { 99, 72, 82, 77, '\0'}
-#define PNG_gAMA PNG_CONST png_byte png_gAMA[5] = {103, 65, 77, 65, '\0'}
-#define PNG_hIST PNG_CONST png_byte png_hIST[5] = {104, 73, 83, 84, '\0'}
-#define PNG_iCCP PNG_CONST png_byte png_iCCP[5] = {105, 67, 67, 80, '\0'}
-#define PNG_iTXt PNG_CONST png_byte png_iTXt[5] = {105, 84, 88, 116, '\0'}
-#define PNG_oFFs PNG_CONST png_byte png_oFFs[5] = {111, 70, 70, 115, '\0'}
-#define PNG_pCAL PNG_CONST png_byte png_pCAL[5] = {112, 67, 65, 76, '\0'}
-#define PNG_sCAL PNG_CONST png_byte png_sCAL[5] = {115, 67, 65, 76, '\0'}
-#define PNG_pHYs PNG_CONST png_byte png_pHYs[5] = {112, 72, 89, 115, '\0'}
-#define PNG_sBIT PNG_CONST png_byte png_sBIT[5] = {115, 66, 73, 84, '\0'}
-#define PNG_sPLT PNG_CONST png_byte png_sPLT[5] = {115, 80, 76, 84, '\0'}
-#define PNG_sRGB PNG_CONST png_byte png_sRGB[5] = {115, 82, 71, 66, '\0'}
-#define PNG_sTER PNG_CONST png_byte png_sTER[5] = {115, 84, 69, 82, '\0'}
-#define PNG_tEXt PNG_CONST png_byte png_tEXt[5] = {116, 69, 88, 116, '\0'}
-#define PNG_tIME PNG_CONST png_byte png_tIME[5] = {116, 73, 77, 69, '\0'}
-#define PNG_tRNS PNG_CONST png_byte png_tRNS[5] = {116, 82, 78, 83, '\0'}
-#define PNG_zTXt PNG_CONST png_byte png_zTXt[5] = {122, 84, 88, 116, '\0'}
+#define PNG_32b(b,s) ((png_uint_32)(b) << (s))
+#define PNG_CHUNK(b1,b2,b3,b4) \
+ (PNG_32b(b1,24) | PNG_32b(b2,16) | PNG_32b(b3,8) | PNG_32b(b4,0))
+
+#define png_IHDR PNG_CHUNK( 73, 72, 68, 82)
+#define png_IDAT PNG_CHUNK( 73, 68, 65, 84)
+#define png_IEND PNG_CHUNK( 73, 69, 78, 68)
+#define png_PLTE PNG_CHUNK( 80, 76, 84, 69)
+#define png_bKGD PNG_CHUNK( 98, 75, 71, 68)
+#define png_cHRM PNG_CHUNK( 99, 72, 82, 77)
+#define png_gAMA PNG_CHUNK(103, 65, 77, 65)
+#define png_hIST PNG_CHUNK(104, 73, 83, 84)
+#define png_iCCP PNG_CHUNK(105, 67, 67, 80)
+#define png_iTXt PNG_CHUNK(105, 84, 88, 116)
+#define png_oFFs PNG_CHUNK(111, 70, 70, 115)
+#define png_pCAL PNG_CHUNK(112, 67, 65, 76)
+#define png_sCAL PNG_CHUNK(115, 67, 65, 76)
+#define png_pHYs PNG_CHUNK(112, 72, 89, 115)
+#define png_sBIT PNG_CHUNK(115, 66, 73, 84)
+#define png_sPLT PNG_CHUNK(115, 80, 76, 84)
+#define png_sRGB PNG_CHUNK(115, 82, 71, 66)
+#define png_sTER PNG_CHUNK(115, 84, 69, 82)
+#define png_tEXt PNG_CHUNK(116, 69, 88, 116)
+#define png_tIME PNG_CHUNK(116, 73, 77, 69)
+#define png_tRNS PNG_CHUNK(116, 82, 78, 83)
+#define png_zTXt PNG_CHUNK(122, 84, 88, 116)
+
+/* The following will work on (signed char*) strings, whereas the get_uint_32
+ * macro will fail on top-bit-set values because of the sign extension.
+ */
+#define PNG_CHUNK_FROM_STRING(s)\
+ PNG_CHUNK(0xff&(s)[0], 0xff&(s)[1], 0xff&(s)[2], 0xff&(s)[3])
+
+/* This uses (char), not (png_byte) to avoid warnings on systems where (char) is
+ * signed and the argument is a (char[]) This macro will fail miserably on
+ * systems where (char) is more than 8 bits.
+ */
+#define PNG_STRING_FROM_CHUNK(s,c)\
+ (void)(((char*)(s))[0]=(char)((c)>>24), ((char*)(s))[1]=(char)((c)>>16),\
+ ((char*)(s))[2]=(char)((c)>>8), ((char*)(s))[3]=(char)((c)))
+
+/* Do the same but terminate with a null character. */
+#define PNG_CSTRING_FROM_CHUNK(s,c)\
+ (void)(PNG_STRING_FROM_CHUNK(s,c), ((char*)(s))[4] = 0)
+
+/* Test on flag values as defined in the spec (section 5.4): */
+#define PNG_CHUNK_ANCILLIARY(c) (1 & ((c) >> 29))
+#define PNG_CHUNK_CRITICAL(c) (!PNG_CHUNK_ANCILLIARY(c))
+#define PNG_CHUNK_PRIVATE(c) (1 & ((c) >> 21))
+#define PNG_CHUNK_RESERVED(c) (1 & ((c) >> 13))
+#define PNG_CHUNK_SAFE_TO_COPY(c) (1 & ((c) >> 5))
/* Gamma values (new at libpng-1.5.4): */
#define PNG_GAMMA_MAC_OLD 151724 /* Assume '1.8' is really 2.2/1.45! */
@@ -714,17 +901,44 @@ PNG_EXTERN void png_write_finish_row PNGARG((png_structp png_ptr)); /* Internal use only. Called before first row of data */
PNG_EXTERN void png_write_start_row PNGARG((png_structp png_ptr));
-/* Combine a row of data, dealing with alpha, etc. if requested */
+/* Combine a row of data, dealing with alpha, etc. if requested. 'row' is an
+ * array of png_ptr->width pixels. If the image is not interlaced or this
+ * is the final pass this just does a png_memcpy, otherwise the "display" flag
+ * is used to determine whether to copy pixels that are not in the current pass.
+ *
+ * Because 'png_do_read_interlace' (below) replicates pixels this allows this
+ * function to achieve the documented 'blocky' appearance during interlaced read
+ * if display is 1 and the 'sparkle' appearance, where existing pixels in 'row'
+ * are not changed if they are not in the current pass, when display is 0.
+ *
+ * 'display' must be 0 or 1, otherwise the memcpy will be done regardless.
+ *
+ * The API always reads from the png_struct row buffer and always assumes that
+ * it is full width (png_do_read_interlace has already been called.)
+ *
+ * This function is only ever used to write to row buffers provided by the
+ * caller of the relevant libpng API and the row must have already been
+ * transformed by the read transformations.
+ *
+ * The PNG_USE_COMPILE_TIME_MASKS option causes generation of pre-computed
+ * bitmasks for use within the code, otherwise runtime generated masks are used.
+ * The default is compile time masks.
+ */
+#ifndef PNG_USE_COMPILE_TIME_MASKS
+# define PNG_USE_COMPILE_TIME_MASKS 1
+#endif
PNG_EXTERN void png_combine_row PNGARG((png_structp png_ptr, png_bytep row,
- int mask));
+ int display));
#ifdef PNG_READ_INTERLACING_SUPPORTED
-/* Expand an interlaced row */
-/* OLD pre-1.0.9 interface:
+/* Expand an interlaced row: the 'row_info' describes the pass data that has
+ * been read in and must correspond to the pixels in 'row', the pixels are
+ * expanded (moved apart) in 'row' to match the final layout, when doing this
+ * the pixels are *replicated* to the intervening space. This is essential for
+ * the correct operation of png_combine_row, above.
+ */
PNG_EXTERN void png_do_read_interlace PNGARG((png_row_infop row_info,
png_bytep row, int pass, png_uint_32 transformations));
- */
-PNG_EXTERN void png_do_read_interlace PNGARG((png_structp png_ptr));
#endif
/* GRR TO DO (2.0 or whenever): simplify other internal calling interfaces */
@@ -735,10 +949,26 @@ PNG_EXTERN void png_do_write_interlace PNGARG((png_row_infop row_info, png_bytep row, int pass));
#endif
-/* Unfilter a row */
-PNG_EXTERN void png_read_filter_row PNGARG((png_structp png_ptr,
- png_row_infop row_info, png_bytep row, png_const_bytep prev_row,
- int filter));
+/* Unfilter a row: check the filter value before calling this, there is no point
+ * calling it for PNG_FILTER_VALUE_NONE.
+ */
+PNG_EXTERN void png_read_filter_row PNGARG((png_structp pp, png_row_infop row_info,
+ png_bytep row, png_const_bytep prev_row, int filter));
+
+PNG_EXTERN void png_read_filter_row_up_neon PNGARG((png_row_infop row_info,
+ png_bytep row, png_const_bytep prev_row));
+PNG_EXTERN void png_read_filter_row_sub3_neon PNGARG((png_row_infop row_info,
+ png_bytep row, png_const_bytep prev_row));
+PNG_EXTERN void png_read_filter_row_sub4_neon PNGARG((png_row_infop row_info,
+ png_bytep row, png_const_bytep prev_row));
+PNG_EXTERN void png_read_filter_row_avg3_neon PNGARG((png_row_infop row_info,
+ png_bytep row, png_const_bytep prev_row));
+PNG_EXTERN void png_read_filter_row_avg4_neon PNGARG((png_row_infop row_info,
+ png_bytep row, png_const_bytep prev_row));
+PNG_EXTERN void png_read_filter_row_paeth3_neon PNGARG((png_row_infop row_info,
+ png_bytep row, png_const_bytep prev_row));
+PNG_EXTERN void png_read_filter_row_paeth4_neon PNGARG((png_row_infop row_info,
+ png_bytep row, png_const_bytep prev_row));
/* Choose the best filter to use and filter the row data */
PNG_EXTERN void png_write_find_filter PNGARG((png_structp png_ptr,
@@ -988,18 +1218,30 @@ PNG_EXTERN void png_handle_zTXt PNGARG((png_structp png_ptr, png_infop info_ptr, png_uint_32 length));
#endif
+#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
PNG_EXTERN void png_handle_unknown PNGARG((png_structp png_ptr,
png_infop info_ptr, png_uint_32 length));
+#endif
PNG_EXTERN void png_check_chunk_name PNGARG((png_structp png_ptr,
- png_const_bytep chunk_name));
+ png_uint_32 chunk_name));
+
+#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
+/* Exactly as png_handle_as_unknown() except that the argument is a 32-bit chunk
+ * name, not a string.
+ */
+PNG_EXTERN int png_chunk_unknown_handling PNGARG((png_structp png_ptr,
+ png_uint_32 chunk_name));
+#endif
/* Handle the transformations for reading and writing */
#ifdef PNG_READ_TRANSFORMS_SUPPORTED
-PNG_EXTERN void png_do_read_transformations PNGARG((png_structp png_ptr));
+PNG_EXTERN void png_do_read_transformations PNGARG((png_structp png_ptr,
+ png_row_infop row_info));
#endif
#ifdef PNG_WRITE_TRANSFORMS_SUPPORTED
-PNG_EXTERN void png_do_write_transformations PNGARG((png_structp png_ptr));
+PNG_EXTERN void png_do_write_transformations PNGARG((png_structp png_ptr,
+ png_row_infop row_info));
#endif
#ifdef PNG_READ_TRANSFORMS_SUPPORTED
@@ -1078,6 +1320,35 @@ PNG_EXTERN void png_64bit_product PNGARG((long v1, long v2, unsigned long *hi_product, unsigned long *lo_product));
#endif
+#ifdef PNG_cHRM_SUPPORTED
+/* Added at libpng version 1.5.5 */
+typedef struct png_xy
+{
+ png_fixed_point redx, redy;
+ png_fixed_point greenx, greeny;
+ png_fixed_point bluex, bluey;
+ png_fixed_point whitex, whitey;
+} png_xy;
+
+typedef struct png_XYZ
+{
+ png_fixed_point redX, redY, redZ;
+ png_fixed_point greenX, greenY, greenZ;
+ png_fixed_point blueX, blueY, blueZ;
+} png_XYZ;
+
+/* The conversion APIs return 0 on success, non-zero on a parameter error. They
+ * allow conversion between the above representations of a color encoding. When
+ * converting from XYZ end points to chromaticities the absolute magnitude of
+ * the end points is lost, when converting back the sum of the Y values of the
+ * three end points will be 1.0
+ */
+PNG_EXTERN int png_xy_from_XYZ PNGARG((png_xy *xy, png_XYZ XYZ));
+PNG_EXTERN int png_XYZ_from_xy PNGARG((png_XYZ *XYZ, png_xy xy));
+PNG_EXTERN int png_XYZ_from_xy_checked PNGARG((png_structp png_ptr,
+ png_XYZ *XYZ, png_xy xy));
+#endif
+
/* Added at libpng version 1.4.0 */
PNG_EXTERN void png_check_IHDR PNGARG((png_structp png_ptr,
png_uint_32 width, png_uint_32 height, int bit_depth,
@@ -1342,13 +1613,13 @@ PNG_EXTERN png_uint_16 png_gamma_16bit_correct PNGARG((unsigned int value, png_fixed_point gamma_value));
PNG_EXTERN png_byte png_gamma_8bit_correct PNGARG((unsigned int value,
png_fixed_point gamma_value));
+PNG_EXTERN void png_destroy_gamma_table(png_structp png_ptr);
PNG_EXTERN void png_build_gamma_table PNGARG((png_structp png_ptr,
int bit_depth));
#endif
/* Maintainer: Put new private prototypes here ^ and in libpngpf.3 */
-
#include "pngdebug.h"
#ifdef __cplusplus
diff --git a/plugins/FreeImage/Source/LibPNG/pngread.c b/plugins/FreeImage/Source/LibPNG/pngread.c index 3be4ef7231..e2641d540f 100644 --- a/plugins/FreeImage/Source/LibPNG/pngread.c +++ b/plugins/FreeImage/Source/LibPNG/pngread.c @@ -1,7 +1,7 @@ /* pngread.c - read a PNG file
*
- * Last changed in libpng 1.5.4 [July 7, 2011]
+ * Last changed in libpng 1.5.7 [December 15, 2011]
* Copyright (c) 1998-2011 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -80,8 +80,9 @@ png_create_read_struct_2,(png_const_charp user_png_ver, png_voidp error_ptr, #ifdef PNG_SETJMP_SUPPORTED
/* Applications that neglect to set up their own setjmp() and then
- encounter a png_error() will longjmp here. Since the jmpbuf is
- then meaningless we abort instead of returning. */
+ * encounter a png_error() will longjmp here. Since the jmpbuf is
+ * then meaningless we abort instead of returning.
+ */
#ifdef USE_FAR_KEYWORD
if (setjmp(tmp_jmpbuf))
#else
@@ -190,89 +191,35 @@ png_read_info(png_structp png_ptr, png_infop info_ptr) for (;;)
{
- PNG_IHDR;
- PNG_IDAT;
- PNG_IEND;
- PNG_PLTE;
-#ifdef PNG_READ_bKGD_SUPPORTED
- PNG_bKGD;
-#endif
-#ifdef PNG_READ_cHRM_SUPPORTED
- PNG_cHRM;
-#endif
-#ifdef PNG_READ_gAMA_SUPPORTED
- PNG_gAMA;
-#endif
-#ifdef PNG_READ_hIST_SUPPORTED
- PNG_hIST;
-#endif
-#ifdef PNG_READ_iCCP_SUPPORTED
- PNG_iCCP;
-#endif
-#ifdef PNG_READ_iTXt_SUPPORTED
- PNG_iTXt;
-#endif
-#ifdef PNG_READ_oFFs_SUPPORTED
- PNG_oFFs;
-#endif
-#ifdef PNG_READ_pCAL_SUPPORTED
- PNG_pCAL;
-#endif
-#ifdef PNG_READ_pHYs_SUPPORTED
- PNG_pHYs;
-#endif
-#ifdef PNG_READ_sBIT_SUPPORTED
- PNG_sBIT;
-#endif
-#ifdef PNG_READ_sCAL_SUPPORTED
- PNG_sCAL;
-#endif
-#ifdef PNG_READ_sPLT_SUPPORTED
- PNG_sPLT;
-#endif
-#ifdef PNG_READ_sRGB_SUPPORTED
- PNG_sRGB;
-#endif
-#ifdef PNG_READ_tEXt_SUPPORTED
- PNG_tEXt;
-#endif
-#ifdef PNG_READ_tIME_SUPPORTED
- PNG_tIME;
-#endif
-#ifdef PNG_READ_tRNS_SUPPORTED
- PNG_tRNS;
-#endif
-#ifdef PNG_READ_zTXt_SUPPORTED
- PNG_zTXt;
-#endif
png_uint_32 length = png_read_chunk_header(png_ptr);
- PNG_CONST png_bytep chunk_name = png_ptr->chunk_name;
+ png_uint_32 chunk_name = png_ptr->chunk_name;
/* This should be a binary subdivision search or a hash for
* matching the chunk name rather than a linear search.
*/
- if (!png_memcmp(chunk_name, png_IDAT, 4))
+ if (chunk_name == png_IDAT)
if (png_ptr->mode & PNG_AFTER_IDAT)
png_ptr->mode |= PNG_HAVE_CHUNK_AFTER_IDAT;
- if (!png_memcmp(chunk_name, png_IHDR, 4))
+ if (chunk_name == png_IHDR)
png_handle_IHDR(png_ptr, info_ptr, length);
- else if (!png_memcmp(chunk_name, png_IEND, 4))
+ else if (chunk_name == png_IEND)
png_handle_IEND(png_ptr, info_ptr, length);
#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
- else if (png_handle_as_unknown(png_ptr, chunk_name))
+ else if (png_chunk_unknown_handling(png_ptr, chunk_name) !=
+ PNG_HANDLE_CHUNK_AS_DEFAULT)
{
- if (!png_memcmp(chunk_name, png_IDAT, 4))
+ if (chunk_name == png_IDAT)
png_ptr->mode |= PNG_HAVE_IDAT;
png_handle_unknown(png_ptr, info_ptr, length);
- if (!png_memcmp(chunk_name, png_PLTE, 4))
+ if (chunk_name == png_PLTE)
png_ptr->mode |= PNG_HAVE_PLTE;
- else if (!png_memcmp(chunk_name, png_IDAT, 4))
+ else if (chunk_name == png_IDAT)
{
if (!(png_ptr->mode & PNG_HAVE_IHDR))
png_error(png_ptr, "Missing IHDR before IDAT");
@@ -285,10 +232,10 @@ png_read_info(png_structp png_ptr, png_infop info_ptr) }
}
#endif
- else if (!png_memcmp(chunk_name, png_PLTE, 4))
+ else if (chunk_name == png_PLTE)
png_handle_PLTE(png_ptr, info_ptr, length);
- else if (!png_memcmp(chunk_name, png_IDAT, 4))
+ else if (chunk_name == png_IDAT)
{
if (!(png_ptr->mode & PNG_HAVE_IHDR))
png_error(png_ptr, "Missing IHDR before IDAT");
@@ -303,87 +250,87 @@ png_read_info(png_structp png_ptr, png_infop info_ptr) }
#ifdef PNG_READ_bKGD_SUPPORTED
- else if (!png_memcmp(chunk_name, png_bKGD, 4))
+ else if (chunk_name == png_bKGD)
png_handle_bKGD(png_ptr, info_ptr, length);
#endif
#ifdef PNG_READ_cHRM_SUPPORTED
- else if (!png_memcmp(chunk_name, png_cHRM, 4))
+ else if (chunk_name == png_cHRM)
png_handle_cHRM(png_ptr, info_ptr, length);
#endif
#ifdef PNG_READ_gAMA_SUPPORTED
- else if (!png_memcmp(chunk_name, png_gAMA, 4))
+ else if (chunk_name == png_gAMA)
png_handle_gAMA(png_ptr, info_ptr, length);
#endif
#ifdef PNG_READ_hIST_SUPPORTED
- else if (!png_memcmp(chunk_name, png_hIST, 4))
+ else if (chunk_name == png_hIST)
png_handle_hIST(png_ptr, info_ptr, length);
#endif
#ifdef PNG_READ_oFFs_SUPPORTED
- else if (!png_memcmp(chunk_name, png_oFFs, 4))
+ else if (chunk_name == png_oFFs)
png_handle_oFFs(png_ptr, info_ptr, length);
#endif
#ifdef PNG_READ_pCAL_SUPPORTED
- else if (!png_memcmp(chunk_name, png_pCAL, 4))
+ else if (chunk_name == png_pCAL)
png_handle_pCAL(png_ptr, info_ptr, length);
#endif
#ifdef PNG_READ_sCAL_SUPPORTED
- else if (!png_memcmp(chunk_name, png_sCAL, 4))
+ else if (chunk_name == png_sCAL)
png_handle_sCAL(png_ptr, info_ptr, length);
#endif
#ifdef PNG_READ_pHYs_SUPPORTED
- else if (!png_memcmp(chunk_name, png_pHYs, 4))
+ else if (chunk_name == png_pHYs)
png_handle_pHYs(png_ptr, info_ptr, length);
#endif
#ifdef PNG_READ_sBIT_SUPPORTED
- else if (!png_memcmp(chunk_name, png_sBIT, 4))
+ else if (chunk_name == png_sBIT)
png_handle_sBIT(png_ptr, info_ptr, length);
#endif
#ifdef PNG_READ_sRGB_SUPPORTED
- else if (!png_memcmp(chunk_name, png_sRGB, 4))
+ else if (chunk_name == png_sRGB)
png_handle_sRGB(png_ptr, info_ptr, length);
#endif
#ifdef PNG_READ_iCCP_SUPPORTED
- else if (!png_memcmp(chunk_name, png_iCCP, 4))
+ else if (chunk_name == png_iCCP)
png_handle_iCCP(png_ptr, info_ptr, length);
#endif
#ifdef PNG_READ_sPLT_SUPPORTED
- else if (!png_memcmp(chunk_name, png_sPLT, 4))
+ else if (chunk_name == png_sPLT)
png_handle_sPLT(png_ptr, info_ptr, length);
#endif
#ifdef PNG_READ_tEXt_SUPPORTED
- else if (!png_memcmp(chunk_name, png_tEXt, 4))
+ else if (chunk_name == png_tEXt)
png_handle_tEXt(png_ptr, info_ptr, length);
#endif
#ifdef PNG_READ_tIME_SUPPORTED
- else if (!png_memcmp(chunk_name, png_tIME, 4))
+ else if (chunk_name == png_tIME)
png_handle_tIME(png_ptr, info_ptr, length);
#endif
#ifdef PNG_READ_tRNS_SUPPORTED
- else if (!png_memcmp(chunk_name, png_tRNS, 4))
+ else if (chunk_name == png_tRNS)
png_handle_tRNS(png_ptr, info_ptr, length);
#endif
#ifdef PNG_READ_zTXt_SUPPORTED
- else if (!png_memcmp(chunk_name, png_zTXt, 4))
+ else if (chunk_name == png_zTXt)
png_handle_zTXt(png_ptr, info_ptr, length);
#endif
#ifdef PNG_READ_iTXt_SUPPORTED
- else if (!png_memcmp(chunk_name, png_iTXt, 4))
+ else if (chunk_name == png_iTXt)
png_handle_iTXt(png_ptr, info_ptr, length);
#endif
@@ -402,13 +349,7 @@ png_read_update_info(png_structp png_ptr, png_infop info_ptr) if (png_ptr == NULL)
return;
- if (!(png_ptr->flags & PNG_FLAG_ROW_INIT))
- png_read_start_row(png_ptr);
-
- else
- png_warning(png_ptr,
- "Ignoring extra png_read_update_info() call;"
- " row buffer not reallocated");
+ png_read_start_row(png_ptr);
#ifdef PNG_READ_TRANSFORMS_SUPPORTED
png_read_transform_info(png_ptr, info_ptr);
@@ -428,15 +369,8 @@ png_start_read_image(png_structp png_ptr) {
png_debug(1, "in png_start_read_image");
- if (png_ptr == NULL)
- return;
-
- if (!(png_ptr->flags & PNG_FLAG_ROW_INIT))
- png_read_start_row(png_ptr);
- else
- png_warning(png_ptr,
- "Ignoring extra png_start_read_image() call;"
- " row buffer not reallocated");
+ if (png_ptr != NULL)
+ png_read_start_row(png_ptr);
}
#endif /* PNG_SEQUENTIAL_READ_SUPPORTED */
@@ -444,23 +378,30 @@ png_start_read_image(png_structp png_ptr) void PNGAPI
png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row)
{
- PNG_IDAT;
-#ifdef PNG_READ_INTERLACING_SUPPORTED
- PNG_CONST int png_pass_dsp_mask[7] = {0xff, 0x0f, 0xff, 0x33, 0xff, 0x55,
- 0xff};
- PNG_CONST int png_pass_mask[7] = {0x80, 0x08, 0x88, 0x22, 0xaa, 0x55, 0xff};
-#endif
int ret;
+ png_row_info row_info;
+
if (png_ptr == NULL)
return;
png_debug2(1, "in png_read_row (row %lu, pass %d)",
(unsigned long)png_ptr->row_number, png_ptr->pass);
+ /* png_read_start_row sets the information (in particular iwidth) for this
+ * interlace pass.
+ */
if (!(png_ptr->flags & PNG_FLAG_ROW_INIT))
png_read_start_row(png_ptr);
+ /* 1.5.6: row_info moved out of png_struct to a local here. */
+ row_info.width = png_ptr->iwidth; /* NOTE: width of current interlaced row */
+ row_info.color_type = png_ptr->color_type;
+ row_info.bit_depth = png_ptr->bit_depth;
+ row_info.channels = png_ptr->channels;
+ row_info.pixel_depth = png_ptr->pixel_depth;
+ row_info.rowbytes = PNG_ROWBYTES(row_info.pixel_depth, row_info.width);
+
if (png_ptr->row_number == 0 && png_ptr->pass == 0)
{
/* Check for transforms that have been set but were defined out */
@@ -502,7 +443,12 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row) }
#ifdef PNG_READ_INTERLACING_SUPPORTED
- /* If interlaced and we do not need a new row, combine row and return */
+ /* If interlaced and we do not need a new row, combine row and return.
+ * Notice that the pixels we have from previous rows have been transformed
+ * already; we can only combine like with like (transformed or
+ * untransformed) and, because of the libpng API for interlaced images, this
+ * means we must transform before de-interlacing.
+ */
if (png_ptr->interlaced && (png_ptr->transformations & PNG_INTERLACE))
{
switch (png_ptr->pass)
@@ -511,8 +457,7 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row) if (png_ptr->row_number & 0x07)
{
if (dsp_row != NULL)
- png_combine_row(png_ptr, dsp_row,
- png_pass_dsp_mask[png_ptr->pass]);
+ png_combine_row(png_ptr, dsp_row, 1/*display*/);
png_read_finish_row(png_ptr);
return;
}
@@ -522,8 +467,7 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row) if ((png_ptr->row_number & 0x07) || png_ptr->width < 5)
{
if (dsp_row != NULL)
- png_combine_row(png_ptr, dsp_row,
- png_pass_dsp_mask[png_ptr->pass]);
+ png_combine_row(png_ptr, dsp_row, 1/*display*/);
png_read_finish_row(png_ptr);
return;
@@ -534,8 +478,7 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row) if ((png_ptr->row_number & 0x07) != 4)
{
if (dsp_row != NULL && (png_ptr->row_number & 4))
- png_combine_row(png_ptr, dsp_row,
- png_pass_dsp_mask[png_ptr->pass]);
+ png_combine_row(png_ptr, dsp_row, 1/*display*/);
png_read_finish_row(png_ptr);
return;
@@ -546,8 +489,7 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row) if ((png_ptr->row_number & 3) || png_ptr->width < 3)
{
if (dsp_row != NULL)
- png_combine_row(png_ptr, dsp_row,
- png_pass_dsp_mask[png_ptr->pass]);
+ png_combine_row(png_ptr, dsp_row, 1/*display*/);
png_read_finish_row(png_ptr);
return;
@@ -558,8 +500,7 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row) if ((png_ptr->row_number & 3) != 2)
{
if (dsp_row != NULL && (png_ptr->row_number & 2))
- png_combine_row(png_ptr, dsp_row,
- png_pass_dsp_mask[png_ptr->pass]);
+ png_combine_row(png_ptr, dsp_row, 1/*display*/);
png_read_finish_row(png_ptr);
return;
@@ -569,8 +510,7 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row) if ((png_ptr->row_number & 1) || png_ptr->width < 2)
{
if (dsp_row != NULL)
- png_combine_row(png_ptr, dsp_row,
- png_pass_dsp_mask[png_ptr->pass]);
+ png_combine_row(png_ptr, dsp_row, 1/*display*/);
png_read_finish_row(png_ptr);
return;
@@ -606,7 +546,7 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row) png_crc_finish(png_ptr, 0);
png_ptr->idat_size = png_read_chunk_header(png_ptr);
- if (png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
+ if (png_ptr->chunk_name != png_IDAT)
png_error(png_ptr, "Not enough image data");
}
png_ptr->zstream.avail_in = (uInt)png_ptr->zbuf_size;
@@ -636,63 +576,72 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row) } while (png_ptr->zstream.avail_out);
- png_ptr->row_info.color_type = png_ptr->color_type;
- png_ptr->row_info.width = png_ptr->iwidth;
- png_ptr->row_info.channels = png_ptr->channels;
- png_ptr->row_info.bit_depth = png_ptr->bit_depth;
- png_ptr->row_info.pixel_depth = png_ptr->pixel_depth;
- png_ptr->row_info.rowbytes = PNG_ROWBYTES(png_ptr->row_info.pixel_depth,
- png_ptr->row_info.width);
-
- if (png_ptr->row_buf[0])
- png_read_filter_row(png_ptr, &(png_ptr->row_info),
- png_ptr->row_buf + 1, png_ptr->prev_row + 1,
- (int)(png_ptr->row_buf[0]));
+ if (png_ptr->row_buf[0] > PNG_FILTER_VALUE_NONE)
+ {
+ if (png_ptr->row_buf[0] < PNG_FILTER_VALUE_LAST)
+ png_read_filter_row(png_ptr, &row_info, png_ptr->row_buf + 1,
+ png_ptr->prev_row + 1, png_ptr->row_buf[0]);
+ else
+ png_error(png_ptr, "bad adaptive filter value");
+ }
- png_memcpy(png_ptr->prev_row, png_ptr->row_buf, png_ptr->rowbytes + 1);
+ /* libpng 1.5.6: the following line was copying png_ptr->rowbytes before
+ * 1.5.6, while the buffer really is this big in current versions of libpng
+ * it may not be in the future, so this was changed just to copy the
+ * interlaced count:
+ */
+ png_memcpy(png_ptr->prev_row, png_ptr->row_buf, row_info.rowbytes + 1);
#ifdef PNG_MNG_FEATURES_SUPPORTED
if ((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) &&
(png_ptr->filter_type == PNG_INTRAPIXEL_DIFFERENCING))
{
/* Intrapixel differencing */
- png_do_read_intrapixel(&(png_ptr->row_info), png_ptr->row_buf + 1);
+ png_do_read_intrapixel(&row_info, png_ptr->row_buf + 1);
}
#endif
#ifdef PNG_READ_TRANSFORMS_SUPPORTED
if (png_ptr->transformations)
- png_do_read_transformations(png_ptr);
+ png_do_read_transformations(png_ptr, &row_info);
#endif
+ /* The transformed pixel depth should match the depth now in row_info. */
+ if (png_ptr->transformed_pixel_depth == 0)
+ {
+ png_ptr->transformed_pixel_depth = row_info.pixel_depth;
+ if (row_info.pixel_depth > png_ptr->maximum_pixel_depth)
+ png_error(png_ptr, "sequential row overflow");
+ }
+
+ else if (png_ptr->transformed_pixel_depth != row_info.pixel_depth)
+ png_error(png_ptr, "internal sequential row size calculation error");
+
#ifdef PNG_READ_INTERLACING_SUPPORTED
/* Blow up interlaced rows to full size */
if (png_ptr->interlaced &&
(png_ptr->transformations & PNG_INTERLACE))
{
if (png_ptr->pass < 6)
- /* Old interface (pre-1.0.9):
- * png_do_read_interlace(&(png_ptr->row_info),
- * png_ptr->row_buf + 1, png_ptr->pass, png_ptr->transformations);
- */
- png_do_read_interlace(png_ptr);
+ png_do_read_interlace(&row_info, png_ptr->row_buf + 1, png_ptr->pass,
+ png_ptr->transformations);
if (dsp_row != NULL)
- png_combine_row(png_ptr, dsp_row, png_pass_dsp_mask[png_ptr->pass]);
+ png_combine_row(png_ptr, dsp_row, 1/*display*/);
if (row != NULL)
- png_combine_row(png_ptr, row, png_pass_mask[png_ptr->pass]);
+ png_combine_row(png_ptr, row, 0/*row*/);
}
else
#endif
{
if (row != NULL)
- png_combine_row(png_ptr, row, 0xff);
+ png_combine_row(png_ptr, row, -1/*ignored*/);
if (dsp_row != NULL)
- png_combine_row(png_ptr, dsp_row, 0xff);
+ png_combine_row(png_ptr, dsp_row, -1/*ignored*/);
}
png_read_finish_row(png_ptr);
@@ -858,85 +807,31 @@ png_read_end(png_structp png_ptr, png_infop info_ptr) do
{
- PNG_IHDR;
- PNG_IDAT;
- PNG_IEND;
- PNG_PLTE;
-#ifdef PNG_READ_bKGD_SUPPORTED
- PNG_bKGD;
-#endif
-#ifdef PNG_READ_cHRM_SUPPORTED
- PNG_cHRM;
-#endif
-#ifdef PNG_READ_gAMA_SUPPORTED
- PNG_gAMA;
-#endif
-#ifdef PNG_READ_hIST_SUPPORTED
- PNG_hIST;
-#endif
-#ifdef PNG_READ_iCCP_SUPPORTED
- PNG_iCCP;
-#endif
-#ifdef PNG_READ_iTXt_SUPPORTED
- PNG_iTXt;
-#endif
-#ifdef PNG_READ_oFFs_SUPPORTED
- PNG_oFFs;
-#endif
-#ifdef PNG_READ_pCAL_SUPPORTED
- PNG_pCAL;
-#endif
-#ifdef PNG_READ_pHYs_SUPPORTED
- PNG_pHYs;
-#endif
-#ifdef PNG_READ_sBIT_SUPPORTED
- PNG_sBIT;
-#endif
-#ifdef PNG_READ_sCAL_SUPPORTED
- PNG_sCAL;
-#endif
-#ifdef PNG_READ_sPLT_SUPPORTED
- PNG_sPLT;
-#endif
-#ifdef PNG_READ_sRGB_SUPPORTED
- PNG_sRGB;
-#endif
-#ifdef PNG_READ_tEXt_SUPPORTED
- PNG_tEXt;
-#endif
-#ifdef PNG_READ_tIME_SUPPORTED
- PNG_tIME;
-#endif
-#ifdef PNG_READ_tRNS_SUPPORTED
- PNG_tRNS;
-#endif
-#ifdef PNG_READ_zTXt_SUPPORTED
- PNG_zTXt;
-#endif
png_uint_32 length = png_read_chunk_header(png_ptr);
- PNG_CONST png_bytep chunk_name = png_ptr->chunk_name;
+ png_uint_32 chunk_name = png_ptr->chunk_name;
- if (!png_memcmp(chunk_name, png_IHDR, 4))
+ if (chunk_name == png_IHDR)
png_handle_IHDR(png_ptr, info_ptr, length);
- else if (!png_memcmp(chunk_name, png_IEND, 4))
+ else if (chunk_name == png_IEND)
png_handle_IEND(png_ptr, info_ptr, length);
#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
- else if (png_handle_as_unknown(png_ptr, chunk_name))
+ else if (png_chunk_unknown_handling(png_ptr, chunk_name) !=
+ PNG_HANDLE_CHUNK_AS_DEFAULT)
{
- if (!png_memcmp(chunk_name, png_IDAT, 4))
+ if (chunk_name == png_IDAT)
{
if ((length > 0) || (png_ptr->mode & PNG_HAVE_CHUNK_AFTER_IDAT))
png_benign_error(png_ptr, "Too many IDATs found");
}
png_handle_unknown(png_ptr, info_ptr, length);
- if (!png_memcmp(chunk_name, png_PLTE, 4))
+ if (chunk_name == png_PLTE)
png_ptr->mode |= PNG_HAVE_PLTE;
}
#endif
- else if (!png_memcmp(chunk_name, png_IDAT, 4))
+ else if (chunk_name == png_IDAT)
{
/* Zero length IDATs are legal after the last IDAT has been
* read, but not after other chunks have been read.
@@ -946,91 +841,91 @@ png_read_end(png_structp png_ptr, png_infop info_ptr) png_crc_finish(png_ptr, length);
}
- else if (!png_memcmp(chunk_name, png_PLTE, 4))
+ else if (chunk_name == png_PLTE)
png_handle_PLTE(png_ptr, info_ptr, length);
#ifdef PNG_READ_bKGD_SUPPORTED
- else if (!png_memcmp(chunk_name, png_bKGD, 4))
+ else if (chunk_name == png_bKGD)
png_handle_bKGD(png_ptr, info_ptr, length);
#endif
#ifdef PNG_READ_cHRM_SUPPORTED
- else if (!png_memcmp(chunk_name, png_cHRM, 4))
+ else if (chunk_name == png_cHRM)
png_handle_cHRM(png_ptr, info_ptr, length);
#endif
#ifdef PNG_READ_gAMA_SUPPORTED
- else if (!png_memcmp(chunk_name, png_gAMA, 4))
+ else if (chunk_name == png_gAMA)
png_handle_gAMA(png_ptr, info_ptr, length);
#endif
#ifdef PNG_READ_hIST_SUPPORTED
- else if (!png_memcmp(chunk_name, png_hIST, 4))
+ else if (chunk_name == png_hIST)
png_handle_hIST(png_ptr, info_ptr, length);
#endif
#ifdef PNG_READ_oFFs_SUPPORTED
- else if (!png_memcmp(chunk_name, png_oFFs, 4))
+ else if (chunk_name == png_oFFs)
png_handle_oFFs(png_ptr, info_ptr, length);
#endif
#ifdef PNG_READ_pCAL_SUPPORTED
- else if (!png_memcmp(chunk_name, png_pCAL, 4))
+ else if (chunk_name == png_pCAL)
png_handle_pCAL(png_ptr, info_ptr, length);
#endif
#ifdef PNG_READ_sCAL_SUPPORTED
- else if (!png_memcmp(chunk_name, png_sCAL, 4))
+ else if (chunk_name == png_sCAL)
png_handle_sCAL(png_ptr, info_ptr, length);
#endif
#ifdef PNG_READ_pHYs_SUPPORTED
- else if (!png_memcmp(chunk_name, png_pHYs, 4))
+ else if (chunk_name == png_pHYs)
png_handle_pHYs(png_ptr, info_ptr, length);
#endif
#ifdef PNG_READ_sBIT_SUPPORTED
- else if (!png_memcmp(chunk_name, png_sBIT, 4))
+ else if (chunk_name == png_sBIT)
png_handle_sBIT(png_ptr, info_ptr, length);
#endif
#ifdef PNG_READ_sRGB_SUPPORTED
- else if (!png_memcmp(chunk_name, png_sRGB, 4))
+ else if (chunk_name == png_sRGB)
png_handle_sRGB(png_ptr, info_ptr, length);
#endif
#ifdef PNG_READ_iCCP_SUPPORTED
- else if (!png_memcmp(chunk_name, png_iCCP, 4))
+ else if (chunk_name == png_iCCP)
png_handle_iCCP(png_ptr, info_ptr, length);
#endif
#ifdef PNG_READ_sPLT_SUPPORTED
- else if (!png_memcmp(chunk_name, png_sPLT, 4))
+ else if (chunk_name == png_sPLT)
png_handle_sPLT(png_ptr, info_ptr, length);
#endif
#ifdef PNG_READ_tEXt_SUPPORTED
- else if (!png_memcmp(chunk_name, png_tEXt, 4))
+ else if (chunk_name == png_tEXt)
png_handle_tEXt(png_ptr, info_ptr, length);
#endif
#ifdef PNG_READ_tIME_SUPPORTED
- else if (!png_memcmp(chunk_name, png_tIME, 4))
+ else if (chunk_name == png_tIME)
png_handle_tIME(png_ptr, info_ptr, length);
#endif
#ifdef PNG_READ_tRNS_SUPPORTED
- else if (!png_memcmp(chunk_name, png_tRNS, 4))
+ else if (chunk_name == png_tRNS)
png_handle_tRNS(png_ptr, info_ptr, length);
#endif
#ifdef PNG_READ_zTXt_SUPPORTED
- else if (!png_memcmp(chunk_name, png_zTXt, 4))
+ else if (chunk_name == png_zTXt)
png_handle_zTXt(png_ptr, info_ptr, length);
#endif
#ifdef PNG_READ_iTXt_SUPPORTED
- else if (!png_memcmp(chunk_name, png_iTXt, 4))
+ else if (chunk_name == png_iTXt)
png_handle_iTXt(png_ptr, info_ptr, length);
#endif
@@ -1138,9 +1033,13 @@ png_read_destroy(png_structp png_ptr, png_infop info_ptr, if (end_info_ptr != NULL)
png_info_destroy(png_ptr, end_info_ptr);
+#ifdef PNG_READ_GAMMA_SUPPORTED
+ png_destroy_gamma_table(png_ptr);
+#endif
+
png_free(png_ptr, png_ptr->zbuf);
png_free(png_ptr, png_ptr->big_row_buf);
- png_free(png_ptr, png_ptr->prev_row);
+ png_free(png_ptr, png_ptr->big_prev_row);
png_free(png_ptr, png_ptr->chunkdata);
#ifdef PNG_READ_QUANTIZE_SUPPORTED
@@ -1148,15 +1047,6 @@ png_read_destroy(png_structp png_ptr, png_infop info_ptr, png_free(png_ptr, png_ptr->quantize_index);
#endif
-#ifdef PNG_READ_GAMMA_SUPPORTED
- png_free(png_ptr, png_ptr->gamma_table);
-#endif
-
-#ifdef PNG_READ_BACKGROUND_SUPPORTED
- png_free(png_ptr, png_ptr->gamma_from_1);
- png_free(png_ptr, png_ptr->gamma_to_1);
-#endif
-
if (png_ptr->free_me & PNG_FREE_PLTE)
png_zfree(png_ptr, png_ptr->palette);
png_ptr->free_me &= ~PNG_FREE_PLTE;
@@ -1174,42 +1064,6 @@ png_read_destroy(png_structp png_ptr, png_infop info_ptr, png_ptr->free_me &= ~PNG_FREE_HIST;
#endif
-#ifdef PNG_READ_GAMMA_SUPPORTED
- if (png_ptr->gamma_16_table != NULL)
- {
- int i;
- int istop = (1 << (8 - png_ptr->gamma_shift));
- for (i = 0; i < istop; i++)
- {
- png_free(png_ptr, png_ptr->gamma_16_table[i]);
- }
- png_free(png_ptr, png_ptr->gamma_16_table);
- }
-
-#ifdef PNG_READ_BACKGROUND_SUPPORTED
- if (png_ptr->gamma_16_from_1 != NULL)
- {
- int i;
- int istop = (1 << (8 - png_ptr->gamma_shift));
- for (i = 0; i < istop; i++)
- {
- png_free(png_ptr, png_ptr->gamma_16_from_1[i]);
- }
- png_free(png_ptr, png_ptr->gamma_16_from_1);
- }
- if (png_ptr->gamma_16_to_1 != NULL)
- {
- int i;
- int istop = (1 << (8 - png_ptr->gamma_shift));
- for (i = 0; i < istop; i++)
- {
- png_free(png_ptr, png_ptr->gamma_16_to_1[i]);
- }
- png_free(png_ptr, png_ptr->gamma_16_to_1);
- }
-#endif
-#endif
-
inflateEnd(&png_ptr->zstream);
#ifdef PNG_PROGRESSIVE_READ_SUPPORTED
diff --git a/plugins/FreeImage/Source/LibPNG/pngrtran.c b/plugins/FreeImage/Source/LibPNG/pngrtran.c index c23886f3e3..26083a0dd5 100644 --- a/plugins/FreeImage/Source/LibPNG/pngrtran.c +++ b/plugins/FreeImage/Source/LibPNG/pngrtran.c @@ -1,7 +1,7 @@ /* pngrtran.c - transforms the data in a row for PNG readers
*
- * Last changed in libpng 1.5.4 [July 7, 2011]
+ * Last changed in libpng 1.5.7 [December 15, 2011]
* Copyright (c) 1998-2011 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -936,15 +936,15 @@ png_set_rgb_to_gray_fixed(png_structp png_ptr, int error_action, switch(error_action)
{
- case 1:
+ case PNG_ERROR_ACTION_NONE:
png_ptr->transformations |= PNG_RGB_TO_GRAY;
break;
- case 2:
+ case PNG_ERROR_ACTION_WARN:
png_ptr->transformations |= PNG_RGB_TO_GRAY_WARN;
break;
- case 3:
+ case PNG_ERROR_ACTION_ERROR:
png_ptr->transformations |= PNG_RGB_TO_GRAY_ERR;
break;
@@ -968,13 +968,17 @@ png_set_rgb_to_gray_fixed(png_structp png_ptr, int error_action, {
png_uint_16 red_int, green_int;
- red_int = (png_uint_16)(((png_uint_32)red*32768L)/100000L);
- green_int = (png_uint_16)(((png_uint_32)green*32768L)/100000L);
+ /* NOTE: this calculation does not round, but this behavior is retained
+ * for consistency, the inaccuracy is very small. The code here always
+ * overwrites the coefficients, regardless of whether they have been
+ * defaulted or set already.
+ */
+ red_int = (png_uint_16)(((png_uint_32)red*32768)/100000);
+ green_int = (png_uint_16)(((png_uint_32)green*32768)/100000);
png_ptr->rgb_to_gray_red_coeff = red_int;
png_ptr->rgb_to_gray_green_coeff = green_int;
- png_ptr->rgb_to_gray_blue_coeff =
- (png_uint_16)(32768 - red_int - green_int);
+ png_ptr->rgb_to_gray_coefficients_set = 1;
}
else
@@ -983,17 +987,18 @@ png_set_rgb_to_gray_fixed(png_structp png_ptr, int error_action, png_warning(png_ptr,
"ignoring out of range rgb_to_gray coefficients");
- /* Use the defaults, from the cHRM chunk if set, else the built in Rec
- * 709 values (which correspond to sRGB, so we don't have to worry
- * about the sRGB chunk!)
+ /* Use the defaults, from the cHRM chunk if set, else the historical
+ * values which are close to the sRGB/HDTV/ITU-Rec 709 values. See
+ * png_do_rgb_to_gray for more discussion of the values. In this case
+ * the coefficients are not marked as 'set' and are not overwritten if
+ * something has already provided a default.
*/
if (png_ptr->rgb_to_gray_red_coeff == 0 &&
- png_ptr->rgb_to_gray_green_coeff == 0 &&
- png_ptr->rgb_to_gray_blue_coeff == 0)
+ png_ptr->rgb_to_gray_green_coeff == 0)
{
- png_ptr->rgb_to_gray_red_coeff = 6968; /* .212671 * 32768 + .5 */
- png_ptr->rgb_to_gray_green_coeff = 23434; /* .715160 * 32768 + .5 */
- png_ptr->rgb_to_gray_blue_coeff = 2366;
+ png_ptr->rgb_to_gray_red_coeff = 6968;
+ png_ptr->rgb_to_gray_green_coeff = 23434;
+ /* png_ptr->rgb_to_gray_blue_coeff = 2366; */
}
}
}
@@ -1193,53 +1198,44 @@ png_init_rgb_transformations(png_structp png_ptr) {
{
/* Expand background and tRNS chunks */
+ int gray = png_ptr->background.gray;
+ int trans_gray = png_ptr->trans_color.gray;
+
switch (png_ptr->bit_depth)
{
case 1:
- png_ptr->background.gray *= (png_uint_16)0xff;
- png_ptr->background.red = png_ptr->background.green
- = png_ptr->background.blue = png_ptr->background.gray;
- if (!(png_ptr->transformations & PNG_EXPAND_tRNS))
- {
- png_ptr->trans_color.gray *= (png_uint_16)0xff;
- png_ptr->trans_color.red = png_ptr->trans_color.green
- = png_ptr->trans_color.blue = png_ptr->trans_color.gray;
- }
+ gray *= 0xff;
+ trans_gray *= 0xff;
break;
case 2:
- png_ptr->background.gray *= (png_uint_16)0x55;
- png_ptr->background.red = png_ptr->background.green
- = png_ptr->background.blue = png_ptr->background.gray;
- if (!(png_ptr->transformations & PNG_EXPAND_tRNS))
- {
- png_ptr->trans_color.gray *= (png_uint_16)0x55;
- png_ptr->trans_color.red = png_ptr->trans_color.green
- = png_ptr->trans_color.blue = png_ptr->trans_color.gray;
- }
+ gray *= 0x55;
+ trans_gray *= 0x55;
break;
case 4:
- png_ptr->background.gray *= (png_uint_16)0x11;
- png_ptr->background.red = png_ptr->background.green
- = png_ptr->background.blue = png_ptr->background.gray;
- if (!(png_ptr->transformations & PNG_EXPAND_tRNS))
- {
- png_ptr->trans_color.gray *= (png_uint_16)0x11;
- png_ptr->trans_color.red = png_ptr->trans_color.green
- = png_ptr->trans_color.blue = png_ptr->trans_color.gray;
- }
+ gray *= 0x11;
+ trans_gray *= 0x11;
break;
default:
case 8:
+ /* Already 8 bits, fall through */
case 16:
- png_ptr->background.red = png_ptr->background.green
- = png_ptr->background.blue = png_ptr->background.gray;
+ /* Already a full 16 bits */
break;
}
+
+ png_ptr->background.red = png_ptr->background.green =
+ png_ptr->background.blue = (png_uint_16)gray;
+
+ if (!(png_ptr->transformations & PNG_EXPAND_tRNS))
+ {
+ png_ptr->trans_color.red = png_ptr->trans_color.green =
+ png_ptr->trans_color.blue = (png_uint_16)trans_gray;
+ }
}
} /* background expand and (therefore) no alpha association. */
#endif /* PNG_READ_EXPAND_SUPPORTED && PNG_READ_BACKGROUND_SUPPORTED */
@@ -1401,7 +1397,7 @@ png_init_read_transformations(png_structp png_ptr) if (png_ptr->transformations & PNG_BACKGROUND_EXPAND)
{
/* PNG_BACKGROUND_EXPAND: the background is in the file color space, so if
- * the file was greyscale the background value is gray.
+ * the file was grayscale the background value is gray.
*/
if (!(png_ptr->color_type & PNG_COLOR_MASK_COLOR))
png_ptr->mode |= PNG_BACKGROUND_IS_GRAY;
@@ -1469,6 +1465,28 @@ png_init_read_transformations(png_structp png_ptr) }
#endif /* PNG_READ_BACKGROUND_SUPPORTED && PNG_READ_EXPAND_16_SUPPORTED */
+#if defined(PNG_READ_BACKGROUND_SUPPORTED) && \
+ (defined(PNG_READ_SCALE_16_TO_8_SUPPORTED) || \
+ defined(PNG_READ_STRIP_16_TO_8_SUPPORTED))
+ if ((png_ptr->transformations & (PNG_16_TO_8|PNG_SCALE_16_TO_8)) &&
+ (png_ptr->transformations & PNG_COMPOSE) &&
+ !(png_ptr->transformations & PNG_BACKGROUND_EXPAND) &&
+ png_ptr->bit_depth == 16)
+ {
+ /* On the other hand, if a 16-bit file is to be reduced to 8-bits per
+ * component this will also happen after PNG_COMPOSE and so the background
+ * color must be pre-expanded here.
+ *
+ * TODO: fix this too.
+ */
+ png_ptr->background.red = (png_uint_16)(png_ptr->background.red * 257);
+ png_ptr->background.green =
+ (png_uint_16)(png_ptr->background.green * 257);
+ png_ptr->background.blue = (png_uint_16)(png_ptr->background.blue * 257);
+ png_ptr->background.gray = (png_uint_16)(png_ptr->background.gray * 257);
+ }
+#endif
+
/* NOTE: below 'PNG_READ_ALPHA_MODE_SUPPORTED' is presumed to also enable the
* background support (see the comments in scripts/pnglibconf.dfa), this
* allows pre-multiplication of the alpha channel to be implemented as
@@ -1516,6 +1534,16 @@ png_init_read_transformations(png_structp png_ptr) #ifdef PNG_READ_BACKGROUND_SUPPORTED
if (png_ptr->transformations & PNG_COMPOSE)
{
+ /* Issue a warning about this combination: because RGB_TO_GRAY is
+ * optimized to do the gamma transform if present yet do_background has
+ * to do the same thing if both options are set a
+ * double-gamma-correction happens. This is true in all versions of
+ * libpng to date.
+ */
+ if (png_ptr->transformations & PNG_RGB_TO_GRAY)
+ png_warning(png_ptr,
+ "libpng does not support gamma+background+rgb_to_gray");
+
if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
{
/* We don't get to here unless there is a tRNS chunk with non-opaque
@@ -1635,7 +1663,7 @@ png_init_read_transformations(png_structp png_ptr) /* Prevent the transformations being done again.
*
- * NOTE: this is highly dubious; it zaps the transformations in
+ * NOTE: this is highly dubious; it removes the transformations in
* place. This seems inconsistent with the general treatment of the
* transformations elsewhere.
*/
@@ -1645,8 +1673,9 @@ png_init_read_transformations(png_structp png_ptr) /* if (png_ptr->background_gamma_type!=PNG_BACKGROUND_GAMMA_UNKNOWN) */
else /* color_type != PNG_COLOR_TYPE_PALETTE */
{
- png_fixed_point g = PNG_FP_1;
- png_fixed_point gs = PNG_FP_1;
+ int gs_sig, g_sig;
+ png_fixed_point g = PNG_FP_1; /* Correction to linear */
+ png_fixed_point gs = PNG_FP_1; /* Correction to screen */
switch (png_ptr->background_gamma_type)
{
@@ -1670,34 +1699,45 @@ png_init_read_transformations(png_structp png_ptr) png_error(png_ptr, "invalid background gamma type");
}
- png_ptr->background_1.gray = png_gamma_correct(png_ptr,
- png_ptr->background.gray, g);
+ g_sig = png_gamma_significant(g);
+ gs_sig = png_gamma_significant(gs);
+
+ if (g_sig)
+ png_ptr->background_1.gray = png_gamma_correct(png_ptr,
+ png_ptr->background.gray, g);
- png_ptr->background.gray = png_gamma_correct(png_ptr,
- png_ptr->background.gray, gs);
+ if (gs_sig)
+ png_ptr->background.gray = png_gamma_correct(png_ptr,
+ png_ptr->background.gray, gs);
if ((png_ptr->background.red != png_ptr->background.green) ||
(png_ptr->background.red != png_ptr->background.blue) ||
(png_ptr->background.red != png_ptr->background.gray))
{
/* RGB or RGBA with color background */
- png_ptr->background_1.red = png_gamma_correct(png_ptr,
- png_ptr->background.red, g);
+ if (g_sig)
+ {
+ png_ptr->background_1.red = png_gamma_correct(png_ptr,
+ png_ptr->background.red, g);
- png_ptr->background_1.green = png_gamma_correct(png_ptr,
- png_ptr->background.green, g);
+ png_ptr->background_1.green = png_gamma_correct(png_ptr,
+ png_ptr->background.green, g);
- png_ptr->background_1.blue = png_gamma_correct(png_ptr,
- png_ptr->background.blue, g);
+ png_ptr->background_1.blue = png_gamma_correct(png_ptr,
+ png_ptr->background.blue, g);
+ }
- png_ptr->background.red = png_gamma_correct(png_ptr,
- png_ptr->background.red, gs);
+ if (gs_sig)
+ {
+ png_ptr->background.red = png_gamma_correct(png_ptr,
+ png_ptr->background.red, gs);
- png_ptr->background.green = png_gamma_correct(png_ptr,
- png_ptr->background.green, gs);
+ png_ptr->background.green = png_gamma_correct(png_ptr,
+ png_ptr->background.green, gs);
- png_ptr->background.blue = png_gamma_correct(png_ptr,
- png_ptr->background.blue, gs);
+ png_ptr->background.blue = png_gamma_correct(png_ptr,
+ png_ptr->background.blue, gs);
+ }
}
else
@@ -1709,13 +1749,22 @@ png_init_read_transformations(png_structp png_ptr) png_ptr->background.red = png_ptr->background.green
= png_ptr->background.blue = png_ptr->background.gray;
}
+
+ /* The background is now in screen gamma: */
+ png_ptr->background_gamma_type = PNG_BACKGROUND_GAMMA_SCREEN;
} /* color_type != PNG_COLOR_TYPE_PALETTE */
}/* png_ptr->transformations & PNG_BACKGROUND */
else
/* Transformation does not include PNG_BACKGROUND */
#endif /* PNG_READ_BACKGROUND_SUPPORTED */
- if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
+ if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE
+#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED
+ /* RGB_TO_GRAY needs to have non-gamma-corrected values! */
+ && ((png_ptr->transformations & PNG_EXPAND) == 0 ||
+ (png_ptr->transformations & PNG_RGB_TO_GRAY) == 0)
+#endif
+ )
{
png_colorp palette = png_ptr->palette;
int num_palette = png_ptr->num_palette;
@@ -1783,26 +1832,38 @@ png_init_read_transformations(png_structp png_ptr) if ((png_ptr->transformations & PNG_SHIFT) &&
(png_ptr->color_type == PNG_COLOR_TYPE_PALETTE))
{
- png_uint_16 i;
- png_uint_16 istop = png_ptr->num_palette;
- int sr = 8 - png_ptr->sig_bit.red;
- int sg = 8 - png_ptr->sig_bit.green;
- int sb = 8 - png_ptr->sig_bit.blue;
+ int i;
+ int istop = png_ptr->num_palette;
+ int shift = 8 - png_ptr->sig_bit.red;
+
+ /* significant bits can be in the range 1 to 7 for a meaninful result, if
+ * the number of significant bits is 0 then no shift is done (this is an
+ * error condition which is silently ignored.)
+ */
+ if (shift > 0 && shift < 8) for (i=0; i<istop; ++i)
+ {
+ int component = png_ptr->palette[i].red;
- if (sr < 0 || sr > 8)
- sr = 0;
+ component >>= shift;
+ png_ptr->palette[i].red = (png_byte)component;
+ }
- if (sg < 0 || sg > 8)
- sg = 0;
+ shift = 8 - png_ptr->sig_bit.green;
+ if (shift > 0 && shift < 8) for (i=0; i<istop; ++i)
+ {
+ int component = png_ptr->palette[i].green;
- if (sb < 0 || sb > 8)
- sb = 0;
+ component >>= shift;
+ png_ptr->palette[i].green = (png_byte)component;
+ }
- for (i = 0; i < istop; i++)
+ shift = 8 - png_ptr->sig_bit.blue;
+ if (shift > 0 && shift < 8) for (i=0; i<istop; ++i)
{
- png_ptr->palette[i].red >>= sr;
- png_ptr->palette[i].green >>= sg;
- png_ptr->palette[i].blue >>= sb;
+ int component = png_ptr->palette[i].blue;
+
+ component >>= shift;
+ png_ptr->palette[i].blue = (png_byte)component;
}
}
#endif /* PNG_READ_SHIFT_SUPPORTED */
@@ -1895,7 +1956,7 @@ png_read_transform_info(png_structp png_ptr, png_infop info_ptr) info_ptr->bit_depth = 8;
# else
-# if PNG_READ_SCALE_16_TO_8_SUPPORTED
+# ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED
png_ptr->transformations |= PNG_SCALE_16_TO_8;
info_ptr->bit_depth = 8;
# else
@@ -1908,12 +1969,14 @@ png_read_transform_info(png_structp png_ptr, png_infop info_ptr) #ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED
if (png_ptr->transformations & PNG_GRAY_TO_RGB)
- info_ptr->color_type |= PNG_COLOR_MASK_COLOR;
+ info_ptr->color_type = (png_byte)(info_ptr->color_type |
+ PNG_COLOR_MASK_COLOR);
#endif
#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED
if (png_ptr->transformations & PNG_RGB_TO_GRAY)
- info_ptr->color_type &= ~PNG_COLOR_MASK_COLOR;
+ info_ptr->color_type = (png_byte)(info_ptr->color_type &
+ ~PNG_COLOR_MASK_COLOR);
#endif
#ifdef PNG_READ_QUANTIZE_SUPPORTED
@@ -1953,7 +2016,8 @@ png_read_transform_info(png_structp png_ptr, png_infop info_ptr) #ifdef PNG_READ_STRIP_ALPHA_SUPPORTED
if (png_ptr->transformations & PNG_STRIP_ALPHA)
{
- info_ptr->color_type &= ~PNG_COLOR_MASK_ALPHA;
+ info_ptr->color_type = (png_byte)(info_ptr->color_type &
+ ~PNG_COLOR_MASK_ALPHA);
info_ptr->num_trans = 0;
}
#endif
@@ -2010,7 +2074,7 @@ defined(PNG_READ_USER_TRANSFORM_SUPPORTED) * decide how it fits in with the other transformations here.
*/
void /* PRIVATE */
-png_do_read_transformations(png_structp png_ptr)
+png_do_read_transformations(png_structp png_ptr, png_row_infop row_info)
{
png_debug(1, "in png_do_read_transformations");
@@ -2041,9 +2105,9 @@ png_do_read_transformations(png_structp png_ptr) #ifdef PNG_READ_EXPAND_SUPPORTED
if (png_ptr->transformations & PNG_EXPAND)
{
- if (png_ptr->row_info.color_type == PNG_COLOR_TYPE_PALETTE)
+ if (row_info->color_type == PNG_COLOR_TYPE_PALETTE)
{
- png_do_expand_palette(&(png_ptr->row_info), png_ptr->row_buf + 1,
+ png_do_expand_palette(row_info, png_ptr->row_buf + 1,
png_ptr->palette, png_ptr->trans_alpha, png_ptr->num_trans);
}
@@ -2051,11 +2115,11 @@ png_do_read_transformations(png_structp png_ptr) {
if (png_ptr->num_trans &&
(png_ptr->transformations & PNG_EXPAND_tRNS))
- png_do_expand(&(png_ptr->row_info), png_ptr->row_buf + 1,
+ png_do_expand(row_info, png_ptr->row_buf + 1,
&(png_ptr->trans_color));
else
- png_do_expand(&(png_ptr->row_info), png_ptr->row_buf + 1,
+ png_do_expand(row_info, png_ptr->row_buf + 1,
NULL);
}
}
@@ -2064,9 +2128,9 @@ png_do_read_transformations(png_structp png_ptr) #ifdef PNG_READ_STRIP_ALPHA_SUPPORTED
if ((png_ptr->transformations & PNG_STRIP_ALPHA) &&
!(png_ptr->transformations & PNG_COMPOSE) &&
- (png_ptr->row_info.color_type == PNG_COLOR_TYPE_RGB_ALPHA ||
- png_ptr->row_info.color_type == PNG_COLOR_TYPE_GRAY_ALPHA))
- png_do_strip_channel(&(png_ptr->row_info), png_ptr->row_buf + 1,
+ (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA ||
+ row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA))
+ png_do_strip_channel(row_info, png_ptr->row_buf + 1,
0 /* at_start == false, because SWAP_ALPHA happens later */);
#endif
@@ -2074,7 +2138,7 @@ png_do_read_transformations(png_structp png_ptr) if (png_ptr->transformations & PNG_RGB_TO_GRAY)
{
int rgb_error =
- png_do_rgb_to_gray(png_ptr, &(png_ptr->row_info),
+ png_do_rgb_to_gray(png_ptr, row_info,
png_ptr->row_buf + 1);
if (rgb_error)
@@ -2128,45 +2192,55 @@ png_do_read_transformations(png_structp png_ptr) */
if ((png_ptr->transformations & PNG_GRAY_TO_RGB) &&
!(png_ptr->mode & PNG_BACKGROUND_IS_GRAY))
- png_do_gray_to_rgb(&(png_ptr->row_info), png_ptr->row_buf + 1);
+ png_do_gray_to_rgb(row_info, png_ptr->row_buf + 1);
#endif
#if (defined PNG_READ_BACKGROUND_SUPPORTED) ||\
(defined PNG_READ_ALPHA_MODE_SUPPORTED)
if (png_ptr->transformations & PNG_COMPOSE)
- png_do_compose(&(png_ptr->row_info), png_ptr->row_buf + 1, png_ptr);
+ png_do_compose(row_info, png_ptr->row_buf + 1, png_ptr);
#endif
#ifdef PNG_READ_GAMMA_SUPPORTED
if ((png_ptr->transformations & PNG_GAMMA) &&
+#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED
+ /* Because RGB_TO_GRAY does the gamma transform. */
+ !(png_ptr->transformations & PNG_RGB_TO_GRAY) &&
+#endif
#if (defined PNG_READ_BACKGROUND_SUPPORTED) ||\
(defined PNG_READ_ALPHA_MODE_SUPPORTED)
+ /* Because PNG_COMPOSE does the gamma transform if there is something to
+ * do (if there is an alpha channel or transparency.)
+ */
!((png_ptr->transformations & PNG_COMPOSE) &&
((png_ptr->num_trans != 0) ||
(png_ptr->color_type & PNG_COLOR_MASK_ALPHA))) &&
#endif
+ /* Because png_init_read_transformations transforms the palette, unless
+ * RGB_TO_GRAY will do the transform.
+ */
(png_ptr->color_type != PNG_COLOR_TYPE_PALETTE))
- png_do_gamma(&(png_ptr->row_info), png_ptr->row_buf + 1, png_ptr);
+ png_do_gamma(row_info, png_ptr->row_buf + 1, png_ptr);
#endif
#ifdef PNG_READ_STRIP_ALPHA_SUPPORTED
if ((png_ptr->transformations & PNG_STRIP_ALPHA) &&
(png_ptr->transformations & PNG_COMPOSE) &&
- (png_ptr->row_info.color_type == PNG_COLOR_TYPE_RGB_ALPHA ||
- png_ptr->row_info.color_type == PNG_COLOR_TYPE_GRAY_ALPHA))
- png_do_strip_channel(&(png_ptr->row_info), png_ptr->row_buf + 1,
+ (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA ||
+ row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA))
+ png_do_strip_channel(row_info, png_ptr->row_buf + 1,
0 /* at_start == false, because SWAP_ALPHA happens later */);
#endif
#ifdef PNG_READ_ALPHA_MODE_SUPPORTED
if ((png_ptr->transformations & PNG_ENCODE_ALPHA) &&
- (png_ptr->row_info.color_type & PNG_COLOR_MASK_ALPHA))
- png_do_encode_alpha(&(png_ptr->row_info), png_ptr->row_buf + 1, png_ptr);
+ (row_info->color_type & PNG_COLOR_MASK_ALPHA))
+ png_do_encode_alpha(row_info, png_ptr->row_buf + 1, png_ptr);
#endif
#ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED
if (png_ptr->transformations & PNG_SCALE_16_TO_8)
- png_do_scale_16_to_8(&(png_ptr->row_info), png_ptr->row_buf + 1);
+ png_do_scale_16_to_8(row_info, png_ptr->row_buf + 1);
#endif
#ifdef PNG_READ_STRIP_16_TO_8_SUPPORTED
@@ -2175,16 +2249,16 @@ png_do_read_transformations(png_structp png_ptr) * calling the API or in a TRANSFORM flag) this is what happens.
*/
if (png_ptr->transformations & PNG_16_TO_8)
- png_do_chop(&(png_ptr->row_info), png_ptr->row_buf + 1);
+ png_do_chop(row_info, png_ptr->row_buf + 1);
#endif
#ifdef PNG_READ_QUANTIZE_SUPPORTED
if (png_ptr->transformations & PNG_QUANTIZE)
{
- png_do_quantize(&(png_ptr->row_info), png_ptr->row_buf + 1,
+ png_do_quantize(row_info, png_ptr->row_buf + 1,
png_ptr->palette_lookup, png_ptr->quantize_index);
- if (png_ptr->row_info.rowbytes == 0)
+ if (row_info->rowbytes == 0)
png_error(png_ptr, "png_do_quantize returned rowbytes=0");
}
#endif /* PNG_READ_QUANTIZE_SUPPORTED */
@@ -2196,62 +2270,62 @@ png_do_read_transformations(png_structp png_ptr) * better accuracy results faster!)
*/
if (png_ptr->transformations & PNG_EXPAND_16)
- png_do_expand_16(&png_ptr->row_info, png_ptr->row_buf + 1);
+ png_do_expand_16(row_info, png_ptr->row_buf + 1);
#endif
#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED
/*NOTE: moved here in 1.5.4 (from much later in this list.) */
if ((png_ptr->transformations & PNG_GRAY_TO_RGB) &&
(png_ptr->mode & PNG_BACKGROUND_IS_GRAY))
- png_do_gray_to_rgb(&(png_ptr->row_info), png_ptr->row_buf + 1);
+ png_do_gray_to_rgb(row_info, png_ptr->row_buf + 1);
#endif
#ifdef PNG_READ_INVERT_SUPPORTED
if (png_ptr->transformations & PNG_INVERT_MONO)
- png_do_invert(&(png_ptr->row_info), png_ptr->row_buf + 1);
+ png_do_invert(row_info, png_ptr->row_buf + 1);
#endif
#ifdef PNG_READ_SHIFT_SUPPORTED
if (png_ptr->transformations & PNG_SHIFT)
- png_do_unshift(&(png_ptr->row_info), png_ptr->row_buf + 1,
+ png_do_unshift(row_info, png_ptr->row_buf + 1,
&(png_ptr->shift));
#endif
#ifdef PNG_READ_PACK_SUPPORTED
if (png_ptr->transformations & PNG_PACK)
- png_do_unpack(&(png_ptr->row_info), png_ptr->row_buf + 1);
+ png_do_unpack(row_info, png_ptr->row_buf + 1);
#endif
#ifdef PNG_READ_BGR_SUPPORTED
if (png_ptr->transformations & PNG_BGR)
- png_do_bgr(&(png_ptr->row_info), png_ptr->row_buf + 1);
+ png_do_bgr(row_info, png_ptr->row_buf + 1);
#endif
#ifdef PNG_READ_PACKSWAP_SUPPORTED
if (png_ptr->transformations & PNG_PACKSWAP)
- png_do_packswap(&(png_ptr->row_info), png_ptr->row_buf + 1);
+ png_do_packswap(row_info, png_ptr->row_buf + 1);
#endif
#ifdef PNG_READ_FILLER_SUPPORTED
if (png_ptr->transformations & PNG_FILLER)
- png_do_read_filler(&(png_ptr->row_info), png_ptr->row_buf + 1,
+ png_do_read_filler(row_info, png_ptr->row_buf + 1,
(png_uint_32)png_ptr->filler, png_ptr->flags);
#endif
#ifdef PNG_READ_INVERT_ALPHA_SUPPORTED
if (png_ptr->transformations & PNG_INVERT_ALPHA)
- png_do_read_invert_alpha(&(png_ptr->row_info), png_ptr->row_buf + 1);
+ png_do_read_invert_alpha(row_info, png_ptr->row_buf + 1);
#endif
#ifdef PNG_READ_SWAP_ALPHA_SUPPORTED
if (png_ptr->transformations & PNG_SWAP_ALPHA)
- png_do_read_swap_alpha(&(png_ptr->row_info), png_ptr->row_buf + 1);
+ png_do_read_swap_alpha(row_info, png_ptr->row_buf + 1);
#endif
#ifdef PNG_READ_16BIT_SUPPORTED
#ifdef PNG_READ_SWAP_SUPPORTED
if (png_ptr->transformations & PNG_SWAP_BYTES)
- png_do_swap(&(png_ptr->row_info), png_ptr->row_buf + 1);
+ png_do_swap(row_info, png_ptr->row_buf + 1);
#endif
#endif
@@ -2260,8 +2334,8 @@ png_do_read_transformations(png_structp png_ptr) {
if (png_ptr->read_user_transform_fn != NULL)
(*(png_ptr->read_user_transform_fn)) /* User read transform function */
- (png_ptr, /* png_ptr */
- &(png_ptr->row_info), /* row_info: */
+ (png_ptr, /* png_ptr */
+ row_info, /* row_info: */
/* png_uint_32 width; width of row */
/* png_size_t rowbytes; number of bytes in row */
/* png_byte color_type; color type of pixels */
@@ -2271,16 +2345,15 @@ png_do_read_transformations(png_structp png_ptr) png_ptr->row_buf + 1); /* start of pixel data for row */
#ifdef PNG_USER_TRANSFORM_PTR_SUPPORTED
if (png_ptr->user_transform_depth)
- png_ptr->row_info.bit_depth = png_ptr->user_transform_depth;
+ row_info->bit_depth = png_ptr->user_transform_depth;
if (png_ptr->user_transform_channels)
- png_ptr->row_info.channels = png_ptr->user_transform_channels;
+ row_info->channels = png_ptr->user_transform_channels;
#endif
- png_ptr->row_info.pixel_depth = (png_byte)(png_ptr->row_info.bit_depth *
- png_ptr->row_info.channels);
+ row_info->pixel_depth = (png_byte)(row_info->bit_depth *
+ row_info->channels);
- png_ptr->row_info.rowbytes = PNG_ROWBYTES(png_ptr->row_info.pixel_depth,
- png_ptr->row_info.width);
+ row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth, row_info->width);
}
#endif
}
@@ -2394,105 +2467,128 @@ void /* PRIVATE */ png_do_unshift(png_row_infop row_info, png_bytep row,
png_const_color_8p sig_bits)
{
+ int color_type;
+
png_debug(1, "in png_do_unshift");
- if (
- row_info->color_type != PNG_COLOR_TYPE_PALETTE)
+ /* The palette case has already been handled in the _init routine. */
+ color_type = row_info->color_type;
+
+ if (color_type != PNG_COLOR_TYPE_PALETTE)
{
int shift[4];
int channels = 0;
- int c;
- png_uint_16 value = 0;
- png_uint_32 row_width = row_info->width;
+ int bit_depth = row_info->bit_depth;
- if (row_info->color_type & PNG_COLOR_MASK_COLOR)
+ if (color_type & PNG_COLOR_MASK_COLOR)
{
- shift[channels++] = row_info->bit_depth - sig_bits->red;
- shift[channels++] = row_info->bit_depth - sig_bits->green;
- shift[channels++] = row_info->bit_depth - sig_bits->blue;
+ shift[channels++] = bit_depth - sig_bits->red;
+ shift[channels++] = bit_depth - sig_bits->green;
+ shift[channels++] = bit_depth - sig_bits->blue;
}
else
{
- shift[channels++] = row_info->bit_depth - sig_bits->gray;
+ shift[channels++] = bit_depth - sig_bits->gray;
}
- if (row_info->color_type & PNG_COLOR_MASK_ALPHA)
+ if (color_type & PNG_COLOR_MASK_ALPHA)
{
- shift[channels++] = row_info->bit_depth - sig_bits->alpha;
+ shift[channels++] = bit_depth - sig_bits->alpha;
}
- for (c = 0; c < channels; c++)
{
- if (shift[c] <= 0)
- shift[c] = 0;
+ int c, have_shift;
- else
- value = 1;
- }
+ for (c = have_shift = 0; c < channels; ++c)
+ {
+ /* A shift of more than the bit depth is an error condition but it
+ * gets ignored here.
+ */
+ if (shift[c] <= 0 || shift[c] >= bit_depth)
+ shift[c] = 0;
- if (!value)
- return;
+ else
+ have_shift = 1;
+ }
- switch (row_info->bit_depth)
+ if (!have_shift)
+ return;
+ }
+
+ switch (bit_depth)
{
default:
+ /* Must be 1bpp gray: should not be here! */
+ /* NOTREACHED */
break;
case 2:
+ /* Must be 2bpp gray */
+ /* assert(channels == 1 && shift[0] == 1) */
{
- png_bytep bp;
- png_size_t i;
- png_size_t istop = row_info->rowbytes;
+ png_bytep bp = row;
+ png_bytep bp_end = bp + row_info->rowbytes;
- for (bp = row, i = 0; i < istop; i++)
+ while (bp < bp_end)
{
- *bp >>= 1;
- *bp++ &= 0x55;
+ int b = (*bp >> 1) & 0x55;
+ *bp++ = (png_byte)b;
}
break;
}
case 4:
+ /* Must be 4bpp gray */
+ /* assert(channels == 1) */
{
png_bytep bp = row;
- png_size_t i;
- png_size_t istop = row_info->rowbytes;
- png_byte mask = (png_byte)((((int)0xf0 >> shift[0]) & (int)0xf0) |
- (png_byte)((int)0xf >> shift[0]));
+ png_bytep bp_end = bp + row_info->rowbytes;
+ int gray_shift = shift[0];
+ int mask = 0xf >> gray_shift;
- for (i = 0; i < istop; i++)
+ mask |= mask << 4;
+
+ while (bp < bp_end)
{
- *bp >>= shift[0];
- *bp++ &= mask;
+ int b = (*bp >> gray_shift) & mask;
+ *bp++ = (png_byte)b;
}
break;
}
case 8:
+ /* Single byte components, G, GA, RGB, RGBA */
{
png_bytep bp = row;
- png_uint_32 i;
- png_uint_32 istop = row_width * channels;
+ png_bytep bp_end = bp + row_info->rowbytes;
+ int channel = 0;
- for (i = 0; i < istop; i++)
+ while (bp < bp_end)
{
- *bp++ >>= shift[i%channels];
+ int b = *bp >> shift[channel];
+ if (++channel >= channels)
+ channel = 0;
+ *bp++ = (png_byte)b;
}
break;
}
#ifdef PNG_READ_16BIT_SUPPORTED
case 16:
+ /* Double byte components, G, GA, RGB, RGBA */
{
png_bytep bp = row;
- png_uint_32 i;
- png_uint_32 istop = channels * row_width;
+ png_bytep bp_end = bp + row_info->rowbytes;
+ int channel = 0;
- for (i = 0; i < istop; i++)
+ while (bp < bp_end)
{
- value = (png_uint_16)((*bp << 8) + *(bp + 1));
- value >>= shift[i%channels];
+ int value = (bp[0] << 8) + bp[1];
+
+ value >>= shift[channel];
+ if (++channel >= channels)
+ channel = 0;
*bp++ = (png_byte)(value >> 8);
*bp++ = (png_byte)(value & 0xff);
}
@@ -2514,7 +2610,7 @@ png_do_scale_16_to_8(png_row_infop row_info, png_bytep row) if (row_info->bit_depth == 16)
{
png_bytep sp = row; /* source */
- png_bytep dp = row; /* destinaton */
+ png_bytep dp = row; /* destination */
png_bytep ep = sp + row_info->rowbytes; /* end+1 */
while (sp < ep)
@@ -2575,7 +2671,7 @@ png_do_chop(png_row_infop row_info, png_bytep row) if (row_info->bit_depth == 16)
{
png_bytep sp = row; /* source */
- png_bytep dp = row; /* destinaton */
+ png_bytep dp = row; /* destination */
png_bytep ep = sp + row_info->rowbytes; /* end+1 */
while (sp < ep)
@@ -3055,7 +3151,7 @@ png_do_gray_to_rgb(png_row_infop row_info, png_bytep row) }
}
}
- row_info->channels += (png_byte)2;
+ row_info->channels = (png_byte)(row_info->channels + 2);
row_info->color_type |= PNG_COLOR_MASK_COLOR;
row_info->pixel_depth = (png_byte)(row_info->channels *
row_info->bit_depth);
@@ -3066,33 +3162,61 @@ png_do_gray_to_rgb(png_row_infop row_info, png_bytep row) #ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED
/* Reduce RGB files to grayscale, with or without alpha
- * using the equation given in Poynton's ColorFAQ at
- * <http://www.inforamp.net/~poynton/> (THIS LINK IS DEAD June 2008)
- * New link:
- * <http://www.poynton.com/notes/colour_and_gamma/>
+ * using the equation given in Poynton's ColorFAQ of 1998-01-04 at
+ * <http://www.inforamp.net/~poynton/> (THIS LINK IS DEAD June 2008 but
+ * versions dated 1998 through November 2002 have been archived at
+ * http://web.archive.org/web/20000816232553/http://www.inforamp.net/
+ * ~poynton/notes/colour_and_gamma/ColorFAQ.txt )
* Charles Poynton poynton at poynton.com
*
* Y = 0.212671 * R + 0.715160 * G + 0.072169 * B
*
- * We approximate this with
+ * which can be expressed with integers as
+ *
+ * Y = (6969 * R + 23434 * G + 2365 * B)/32768
+ *
+ * Poynton's current link (as of January 2003 through July 2011):
+ * <http://www.poynton.com/notes/colour_and_gamma/>
+ * has changed the numbers slightly:
*
- * Y = 0.21268 * R + 0.7151 * G + 0.07217 * B
+ * Y = 0.2126*R + 0.7152*G + 0.0722*B
*
* which can be expressed with integers as
*
- * Y = (6969 * R + 23434 * G + 2365 * B)/32768
+ * Y = (6966 * R + 23436 * G + 2366 * B)/32768
+ *
+ * Historically, however, libpng uses numbers derived from the ITU-R Rec 709
+ * end point chromaticities and the D65 white point. Depending on the
+ * precision used for the D65 white point this produces a variety of different
+ * numbers, however if the four decimal place value used in ITU-R Rec 709 is
+ * used (0.3127,0.3290) the Y calculation would be:
+ *
+ * Y = (6968 * R + 23435 * G + 2366 * B)/32768
*
- * The calculation is to be done in a linear colorspace.
+ * While this is correct the rounding results in an overflow for white, because
+ * the sum of the rounded coefficients is 32769, not 32768. Consequently
+ * libpng uses, instead, the closest non-overflowing approximation:
*
- * Other integer coefficents can be used via png_set_rgb_to_gray().
+ * Y = (6968 * R + 23434 * G + 2366 * B)/32768
+ *
+ * Starting with libpng-1.5.5, if the image being converted has a cHRM chunk
+ * (including an sRGB chunk) then the chromaticities are used to calculate the
+ * coefficients. See the chunk handling in pngrutil.c for more information.
+ *
+ * In all cases the calculation is to be done in a linear colorspace. If no
+ * gamma information is available to correct the encoding of the original RGB
+ * values this results in an implicit assumption that the original PNG RGB
+ * values were linear.
+ *
+ * Other integer coefficents can be used via png_set_rgb_to_gray(). Because
+ * the API takes just red and green coefficients the blue coefficient is
+ * calculated to make the sum 32768. This will result in different rounding
+ * to that used above.
*/
int /* PRIVATE */
png_do_rgb_to_gray(png_structp png_ptr, png_row_infop row_info, png_bytep row)
{
- png_uint_32 i;
-
- png_uint_32 row_width = row_info->width;
int rgb_error = 0;
png_debug(1, "in png_do_rgb_to_gray");
@@ -3100,235 +3224,180 @@ png_do_rgb_to_gray(png_structp png_ptr, png_row_infop row_info, png_bytep row) if (!(row_info->color_type & PNG_COLOR_MASK_PALETTE) &&
(row_info->color_type & PNG_COLOR_MASK_COLOR))
{
- png_uint_32 rc = png_ptr->rgb_to_gray_red_coeff;
- png_uint_32 gc = png_ptr->rgb_to_gray_green_coeff;
- png_uint_32 bc = png_ptr->rgb_to_gray_blue_coeff;
+ PNG_CONST png_uint_32 rc = png_ptr->rgb_to_gray_red_coeff;
+ PNG_CONST png_uint_32 gc = png_ptr->rgb_to_gray_green_coeff;
+ PNG_CONST png_uint_32 bc = 32768 - rc - gc;
+ PNG_CONST png_uint_32 row_width = row_info->width;
+ PNG_CONST int have_alpha =
+ (row_info->color_type & PNG_COLOR_MASK_ALPHA) != 0;
- if (row_info->color_type == PNG_COLOR_TYPE_RGB)
+ if (row_info->bit_depth == 8)
{
- if (row_info->bit_depth == 8)
- {
#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED)
- if (png_ptr->gamma_from_1 != NULL && png_ptr->gamma_to_1 != NULL)
+ /* Notice that gamma to/from 1 are not necessarily inverses (if
+ * there is an overall gamma correction). Prior to 1.5.5 this code
+ * checked the linearized values for equality; this doesn't match
+ * the documentation, the original values must be checked.
+ */
+ if (png_ptr->gamma_from_1 != NULL && png_ptr->gamma_to_1 != NULL)
+ {
+ png_bytep sp = row;
+ png_bytep dp = row;
+ png_uint_32 i;
+
+ for (i = 0; i < row_width; i++)
{
- png_bytep sp = row;
- png_bytep dp = row;
+ png_byte red = *(sp++);
+ png_byte green = *(sp++);
+ png_byte blue = *(sp++);
- for (i = 0; i < row_width; i++)
+ if (red != green || red != blue)
{
- png_byte red = png_ptr->gamma_to_1[*(sp++)];
- png_byte green = png_ptr->gamma_to_1[*(sp++)];
- png_byte blue = png_ptr->gamma_to_1[*(sp++)];
-
- if (red != green || red != blue)
- {
- rgb_error |= 1;
- *(dp++) = png_ptr->gamma_from_1[
- (rc*red + gc*green + bc*blue)>>15];
- }
+ red = png_ptr->gamma_to_1[red];
+ green = png_ptr->gamma_to_1[green];
+ blue = png_ptr->gamma_to_1[blue];
- else
- *(dp++) = *(sp - 1);
+ rgb_error |= 1;
+ *(dp++) = png_ptr->gamma_from_1[
+ (rc*red + gc*green + bc*blue + 16384)>>15];
}
- }
- else
-#endif
- {
- png_bytep sp = row;
- png_bytep dp = row;
- for (i = 0; i < row_width; i++)
- {
- png_byte red = *(sp++);
- png_byte green = *(sp++);
- png_byte blue = *(sp++);
- if (red != green || red != blue)
- {
- rgb_error |= 1;
- *(dp++) = (png_byte)((rc*red + gc*green + bc*blue)>>15);
- }
+ else
+ {
+ /* If there is no overall correction the table will not be
+ * set.
+ */
+ if (png_ptr->gamma_table != NULL)
+ red = png_ptr->gamma_table[red];
- else
- *(dp++) = *(sp - 1);
+ *(dp++) = red;
}
+
+ if (have_alpha)
+ *(dp++) = *(sp++);
}
}
-
- else /* RGB bit_depth == 16 */
+ else
+#endif
{
-#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED)
- if (png_ptr->gamma_16_to_1 != NULL &&
- png_ptr->gamma_16_from_1 != NULL)
- {
- png_bytep sp = row;
- png_bytep dp = row;
- for (i = 0; i < row_width; i++)
- {
- png_uint_16 red, green, blue, w;
-
- red = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2;
- green = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2;
- blue = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2;
-
- if (red == green && red == blue)
- w = red;
-
- else
- {
- png_uint_16 red_1 = png_ptr->gamma_16_to_1[(red&0xff)
- >> png_ptr->gamma_shift][red>>8];
- png_uint_16 green_1 =
- png_ptr->gamma_16_to_1[(green&0xff) >>
- png_ptr->gamma_shift][green>>8];
- png_uint_16 blue_1 = png_ptr->gamma_16_to_1[(blue&0xff)
- >> png_ptr->gamma_shift][blue>>8];
- png_uint_16 gray16 = (png_uint_16)((rc*red_1 + gc*green_1
- + bc*blue_1)>>15);
- w = png_ptr->gamma_16_from_1[(gray16&0xff) >>
- png_ptr->gamma_shift][gray16 >> 8];
- rgb_error |= 1;
- }
+ png_bytep sp = row;
+ png_bytep dp = row;
+ png_uint_32 i;
- *(dp++) = (png_byte)((w>>8) & 0xff);
- *(dp++) = (png_byte)(w & 0xff);
- }
- }
- else
-#endif
+ for (i = 0; i < row_width; i++)
{
- png_bytep sp = row;
- png_bytep dp = row;
- for (i = 0; i < row_width; i++)
- {
- png_uint_16 red, green, blue, gray16;
+ png_byte red = *(sp++);
+ png_byte green = *(sp++);
+ png_byte blue = *(sp++);
- red = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2;
- green = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2;
- blue = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2;
+ if (red != green || red != blue)
+ {
+ rgb_error |= 1;
+ /*NOTE: this is the historical approach which simply
+ * truncates the results.
+ */
+ *(dp++) = (png_byte)((rc*red + gc*green + bc*blue)>>15);
+ }
- if (red != green || red != blue)
- rgb_error |= 1;
+ else
+ *(dp++) = red;
- gray16 = (png_uint_16)((rc*red + gc*green + bc*blue)>>15);
- *(dp++) = (png_byte)((gray16>>8) & 0xff);
- *(dp++) = (png_byte)(gray16 & 0xff);
- }
+ if (have_alpha)
+ *(dp++) = *(sp++);
}
}
}
- if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
+
+ else /* RGB bit_depth == 16 */
{
- if (row_info->bit_depth == 8)
- {
#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED)
- if (png_ptr->gamma_from_1 != NULL && png_ptr->gamma_to_1 != NULL)
+ if (png_ptr->gamma_16_to_1 != NULL && png_ptr->gamma_16_from_1 != NULL)
+ {
+ png_bytep sp = row;
+ png_bytep dp = row;
+ png_uint_32 i;
+
+ for (i = 0; i < row_width; i++)
{
- png_bytep sp = row;
- png_bytep dp = row;
- for (i = 0; i < row_width; i++)
- {
- png_byte red = png_ptr->gamma_to_1[*(sp++)];
- png_byte green = png_ptr->gamma_to_1[*(sp++)];
- png_byte blue = png_ptr->gamma_to_1[*(sp++)];
+ png_uint_16 red, green, blue, w;
- if (red != green || red != blue)
- rgb_error |= 1;
+ red = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2;
+ green = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2;
+ blue = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2;
- *(dp++) = png_ptr->gamma_from_1
- [(rc*red + gc*green + bc*blue)>>15];
+ if (red == green && red == blue)
+ {
+ if (png_ptr->gamma_16_table != NULL)
+ w = png_ptr->gamma_16_table[(red&0xff)
+ >> png_ptr->gamma_shift][red>>8];
- *(dp++) = *(sp++); /* alpha */
+ else
+ w = red;
}
- }
- else
-#endif
- {
- png_bytep sp = row;
- png_bytep dp = row;
- for (i = 0; i < row_width; i++)
+
+ else
{
- png_byte red = *(sp++);
- png_byte green = *(sp++);
- png_byte blue = *(sp++);
- if (red != green || red != blue)
- rgb_error |= 1;
-
- *(dp++) = (png_byte)((rc*red + gc*green + bc*blue)>>15);
- *(dp++) = *(sp++); /* alpha */
+ png_uint_16 red_1 = png_ptr->gamma_16_to_1[(red&0xff)
+ >> png_ptr->gamma_shift][red>>8];
+ png_uint_16 green_1 =
+ png_ptr->gamma_16_to_1[(green&0xff) >>
+ png_ptr->gamma_shift][green>>8];
+ png_uint_16 blue_1 = png_ptr->gamma_16_to_1[(blue&0xff)
+ >> png_ptr->gamma_shift][blue>>8];
+ png_uint_16 gray16 = (png_uint_16)((rc*red_1 + gc*green_1
+ + bc*blue_1 + 16384)>>15);
+ w = png_ptr->gamma_16_from_1[(gray16&0xff) >>
+ png_ptr->gamma_shift][gray16 >> 8];
+ rgb_error |= 1;
+ }
+
+ *(dp++) = (png_byte)((w>>8) & 0xff);
+ *(dp++) = (png_byte)(w & 0xff);
+
+ if (have_alpha)
+ {
+ *(dp++) = *(sp++);
+ *(dp++) = *(sp++);
}
}
}
- else /* RGBA bit_depth == 16 */
+ else
+#endif
{
-#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED)
- if (png_ptr->gamma_16_to_1 != NULL &&
- png_ptr->gamma_16_from_1 != NULL)
- {
- png_bytep sp = row;
- png_bytep dp = row;
- for (i = 0; i < row_width; i++)
- {
- png_uint_16 red, green, blue, w;
-
- red = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2;
- green = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2;
- blue = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2;
-
- if (red == green && red == blue)
- w = red;
-
- else
- {
- png_uint_16 red_1 = png_ptr->gamma_16_to_1[(red&0xff) >>
- png_ptr->gamma_shift][red>>8];
-
- png_uint_16 green_1 =
- png_ptr->gamma_16_to_1[(green&0xff) >>
- png_ptr->gamma_shift][green>>8];
+ png_bytep sp = row;
+ png_bytep dp = row;
+ png_uint_32 i;
- png_uint_16 blue_1 = png_ptr->gamma_16_to_1[(blue&0xff) >>
- png_ptr->gamma_shift][blue>>8];
+ for (i = 0; i < row_width; i++)
+ {
+ png_uint_16 red, green, blue, gray16;
- png_uint_16 gray16 = (png_uint_16)((rc * red_1
- + gc * green_1 + bc * blue_1)>>15);
+ red = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2;
+ green = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2;
+ blue = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2;
- w = png_ptr->gamma_16_from_1[(gray16&0xff) >>
- png_ptr->gamma_shift][gray16 >> 8];
+ if (red != green || red != blue)
+ rgb_error |= 1;
- rgb_error |= 1;
- }
+ /* From 1.5.5 in the 16 bit case do the accurate conversion even
+ * in the 'fast' case - this is because this is where the code
+ * ends up when handling linear 16 bit data.
+ */
+ gray16 = (png_uint_16)((rc*red + gc*green + bc*blue + 16384) >>
+ 15);
+ *(dp++) = (png_byte)((gray16>>8) & 0xff);
+ *(dp++) = (png_byte)(gray16 & 0xff);
- *(dp++) = (png_byte)((w>>8) & 0xff);
- *(dp++) = (png_byte)(w & 0xff);
- *(dp++) = *(sp++); /* alpha */
- *(dp++) = *(sp++);
- }
- }
- else
-#endif
- {
- png_bytep sp = row;
- png_bytep dp = row;
- for (i = 0; i < row_width; i++)
+ if (have_alpha)
{
- png_uint_16 red, green, blue, gray16;
- red = (png_uint_16)((*(sp)<<8) | *(sp + 1)); sp += 2;
- green = (png_uint_16)((*(sp)<<8) | *(sp + 1)); sp += 2;
- blue = (png_uint_16)((*(sp)<<8) | *(sp + 1)); sp += 2;
-
- if (red != green || red != blue)
- rgb_error |= 1;
-
- gray16 = (png_uint_16)((rc*red + gc*green + bc*blue)>>15);
- *(dp++) = (png_byte)((gray16>>8) & 0xff);
- *(dp++) = (png_byte)(gray16 & 0xff);
- *(dp++) = *(sp++); /* alpha */
+ *(dp++) = *(sp++);
*(dp++) = *(sp++);
}
}
}
}
- row_info->channels -= 2;
+
+ row_info->channels = (png_byte)(row_info->channels - 2);
row_info->color_type = (png_byte)(row_info->color_type &
~PNG_COLOR_MASK_COLOR);
row_info->pixel_depth = (png_byte)(row_info->channels *
@@ -3398,7 +3467,8 @@ png_build_grayscale_palette(int bit_depth, png_colorp palette) #ifdef PNG_READ_TRANSFORMS_SUPPORTED
-#ifdef PNG_READ_BACKGROUND_SUPPORTED
+#if (defined PNG_READ_BACKGROUND_SUPPORTED) ||\
+ (defined PNG_READ_ALPHA_MODE_SUPPORTED)
/* Replace any alpha or transparency with the supplied background color.
* "background" is already in the screen gamma, while "background_1" is
* at a gamma of 1.0. Paletted files have already been taken care of.
@@ -4106,7 +4176,7 @@ png_do_compose(png_row_infop row_info, png_bytep row, png_structp png_ptr) }
}
}
-#endif
+#endif /* PNG_READ_BACKGROUND_SUPPORTED || PNG_READ_ALPHA_MODE_SUPPORTED */
#ifdef PNG_READ_GAMMA_SUPPORTED
/* Gamma correct the image, avoiding the alpha channel. Make sure
@@ -4762,7 +4832,7 @@ png_do_expand(png_row_infop row_info, png_bytep row, #endif
#ifdef PNG_READ_EXPAND_16_SUPPORTED
-/* If the bit depth is 8 and the colour type is not a palette type expand the
+/* If the bit depth is 8 and the color type is not a palette type expand the
* whole row to 16 bits. Has no effect otherwise.
*/
void /* PRIVATE */
@@ -4939,8 +5009,8 @@ png_do_read_intrapixel(png_row_infop row_info, png_bytep row) png_uint_32 s0 = (*(rp ) << 8) | *(rp + 1);
png_uint_32 s1 = (*(rp + 2) << 8) | *(rp + 3);
png_uint_32 s2 = (*(rp + 4) << 8) | *(rp + 5);
- png_uint_32 red = (png_uint_32)((s0 + s1 + 65536L) & 0xffffL);
- png_uint_32 blue = (png_uint_32)((s2 + s1 + 65536L) & 0xffffL);
+ png_uint_32 red = (s0 + s1 + 65536) & 0xffff;
+ png_uint_32 blue = (s2 + s1 + 65536) & 0xffff;
*(rp ) = (png_byte)((red >> 8) & 0xff);
*(rp + 1) = (png_byte)(red & 0xff);
*(rp + 4) = (png_byte)((blue >> 8) & 0xff);
diff --git a/plugins/FreeImage/Source/LibPNG/pngrutil.c b/plugins/FreeImage/Source/LibPNG/pngrutil.c index 3fe202063f..7b4557f5a3 100644 --- a/plugins/FreeImage/Source/LibPNG/pngrutil.c +++ b/plugins/FreeImage/Source/LibPNG/pngrutil.c @@ -1,8 +1,8 @@ /* pngrutil.c - utilities to read a PNG file
*
- * Last changed in libpng 1.5.4 [July 7, 2011]
- * Copyright (c) 1998-2011 Glenn Randers-Pehrson
+ * Last changed in libpng 1.5.9 [February 18, 2012]
+ * Copyright (c) 1998-2012 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
@@ -87,10 +87,10 @@ png_int_32 (PNGAPI png_get_int_32)(png_const_bytep buf)
{
png_uint_32 uval = png_get_uint_32(buf);
- if ((uval & 0x80000000L) == 0) /* non-negative */
+ if ((uval & 0x80000000) == 0) /* non-negative */
return uval;
- uval = (uval ^ 0xffffffffL) + 1; /* 2's complement: -x = ~x+1 */
+ uval = (uval ^ 0xffffffff) + 1; /* 2's complement: -x = ~x+1 */
return -(png_int_32)uval;
}
@@ -165,14 +165,14 @@ png_read_chunk_header(png_structp png_ptr) length = png_get_uint_31(png_ptr, buf);
/* Put the chunk name into png_ptr->chunk_name. */
- png_memcpy(png_ptr->chunk_name, buf + 4, 4);
+ png_ptr->chunk_name = PNG_CHUNK_FROM_STRING(buf+4);
- png_debug2(0, "Reading %s chunk, length = %u",
- png_ptr->chunk_name, length);
+ png_debug2(0, "Reading %lx chunk, length = %lu",
+ (unsigned long)png_ptr->chunk_name, (unsigned long)length);
/* Reset the crc and run it over the chunk name. */
png_reset_crc(png_ptr);
- png_calculate_crc(png_ptr, png_ptr->chunk_name, 4);
+ png_calculate_crc(png_ptr, buf + 4, 4);
/* Check to see if chunk name is valid. */
png_check_chunk_name(png_ptr, png_ptr->chunk_name);
@@ -218,10 +218,9 @@ png_crc_finish(png_structp png_ptr, png_uint_32 skip) if (png_crc_error(png_ptr))
{
- if (((png_ptr->chunk_name[0] & 0x20) && /* Ancillary */
- !(png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_NOWARN)) ||
- (!(png_ptr->chunk_name[0] & 0x20) && /* Critical */
- (png_ptr->flags & PNG_FLAG_CRC_CRITICAL_USE)))
+ if (PNG_CHUNK_ANCILLIARY(png_ptr->chunk_name) ?
+ !(png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_NOWARN) :
+ (png_ptr->flags & PNG_FLAG_CRC_CRITICAL_USE))
{
png_chunk_warning(png_ptr, "CRC error");
}
@@ -248,14 +247,14 @@ png_crc_error(png_structp png_ptr) png_uint_32 crc;
int need_crc = 1;
- if (png_ptr->chunk_name[0] & 0x20) /* ancillary */
+ if (PNG_CHUNK_ANCILLIARY(png_ptr->chunk_name))
{
if ((png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_MASK) ==
(PNG_FLAG_CRC_ANCILLARY_USE | PNG_FLAG_CRC_ANCILLARY_NOWARN))
need_crc = 0;
}
- else /* critical */
+ else /* critical */
{
if (png_ptr->flags & PNG_FLAG_CRC_CRITICAL_IGNORE)
need_crc = 0;
@@ -302,7 +301,7 @@ png_inflate(png_structp png_ptr, png_bytep data, png_size_t size, {
int ret, avail;
- /* The setting of 'avail_in' used to be outside the loop, by setting it
+ /* The setting of 'avail_in' used to be outside the loop; by setting it
* inside it is possible to chunk the input to zlib and simply rely on
* zlib to advance the 'next_in' pointer. This allows arbitrary amounts o
* data to be passed through zlib at the unavoidable cost of requiring a
@@ -433,15 +432,18 @@ png_decompress_chunk(png_structp png_ptr, int comp_type, /* Now check the limits on this chunk - if the limit fails the
* compressed data will be removed, the prefix will remain.
*/
+ if (prefix_size >= (~(png_size_t)0) - 1 ||
+ expanded_size >= (~(png_size_t)0) - 1 - prefix_size
#ifdef PNG_SET_CHUNK_MALLOC_LIMIT_SUPPORTED
- if (png_ptr->user_chunk_malloc_max &&
+ || (png_ptr->user_chunk_malloc_max &&
(prefix_size + expanded_size >= png_ptr->user_chunk_malloc_max - 1))
#else
# ifdef PNG_USER_CHUNK_MALLOC_MAX
- if ((PNG_USER_CHUNK_MALLOC_MAX > 0) &&
+ || ((PNG_USER_CHUNK_MALLOC_MAX > 0) &&
prefix_size + expanded_size >= PNG_USER_CHUNK_MALLOC_MAX - 1)
# endif
#endif
+ )
png_warning(png_ptr, "Exceeded size limit while expanding chunk");
/* If the size is zero either there was an error and a message
@@ -449,16 +451,11 @@ png_decompress_chunk(png_structp png_ptr, int comp_type, * and we have nothing to do - the code will exit through the
* error case below.
*/
-#if defined(PNG_SET_CHUNK_MALLOC_LIMIT_SUPPORTED) || \
- defined(PNG_USER_CHUNK_MALLOC_MAX)
else if (expanded_size > 0)
-#else
- if (expanded_size > 0)
-#endif
{
/* Success (maybe) - really uncompress the chunk. */
png_size_t new_size = 0;
- png_charp text = png_malloc_warn(png_ptr,
+ png_charp text = (png_charp)png_malloc_warn(png_ptr,
prefix_size + expanded_size + 1);
if (text != NULL)
@@ -491,7 +488,7 @@ png_decompress_chunk(png_structp png_ptr, int comp_type, {
PNG_WARNING_PARAMETERS(p)
png_warning_parameter_signed(p, 1, PNG_NUMBER_FORMAT_d, comp_type);
- png_formatted_warning(png_ptr, p, "Unknown zTXt compression type @1");
+ png_formatted_warning(png_ptr, p, "Unknown compression type @1");
/* The recovery is to simply drop the data. */
}
@@ -501,7 +498,7 @@ png_decompress_chunk(png_structp png_ptr, int comp_type, * amount of compressed data.
*/
{
- png_charp text = png_malloc_warn(png_ptr, prefix_size + 1);
+ png_charp text = (png_charp)png_malloc_warn(png_ptr, prefix_size + 1);
if (text != NULL)
{
@@ -827,7 +824,7 @@ png_handle_gAMA(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) # ifdef PNG_READ_sRGB_SUPPORTED
if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_sRGB))
{
- if (PNG_OUT_OF_RANGE(igamma, 45500L, 500))
+ if (PNG_OUT_OF_RANGE(igamma, 45500, 500))
{
PNG_WARNING_PARAMETERS(p)
png_warning_parameter_signed(p, 1, PNG_NUMBER_FORMAT_fixed, igamma);
@@ -942,7 +939,7 @@ png_handle_cHRM(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) else if (png_ptr->mode & PNG_HAVE_PLTE)
/* Should be an error, but we can cope with it */
- png_warning(png_ptr, "Missing PLTE before cHRM");
+ png_warning(png_ptr, "Out of place cHRM chunk");
if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM)
# ifdef PNG_READ_sRGB_SUPPORTED
@@ -994,10 +991,10 @@ png_handle_cHRM(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) {
if (PNG_OUT_OF_RANGE(x_white, 31270, 1000) ||
PNG_OUT_OF_RANGE(y_white, 32900, 1000) ||
- PNG_OUT_OF_RANGE(x_red, 64000L, 1000) ||
+ PNG_OUT_OF_RANGE(x_red, 64000, 1000) ||
PNG_OUT_OF_RANGE(y_red, 33000, 1000) ||
PNG_OUT_OF_RANGE(x_green, 30000, 1000) ||
- PNG_OUT_OF_RANGE(y_green, 60000L, 1000) ||
+ PNG_OUT_OF_RANGE(y_green, 60000, 1000) ||
PNG_OUT_OF_RANGE(x_blue, 15000, 1000) ||
PNG_OUT_OF_RANGE(y_blue, 6000, 1000))
{
@@ -1022,27 +1019,80 @@ png_handle_cHRM(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) #ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED
/* Store the _white values as default coefficients for the rgb to gray
- * operation if it is supported.
+ * operation if it is supported. Check if the transform is already set to
+ * avoid destroying the transform values.
*/
- if ((png_ptr->transformations & PNG_RGB_TO_GRAY) == 0)
+ if (!png_ptr->rgb_to_gray_coefficients_set)
{
- /* png_set_background has not been called, the coefficients must be in
- * range for the following to work without overflow.
+ /* png_set_background has not been called and we haven't seen an sRGB
+ * chunk yet. Find the XYZ of the three end points.
*/
- if (y_red <= (1<<17) && y_green <= (1<<17) && y_blue <= (1<<17))
+ png_XYZ XYZ;
+ png_xy xy;
+
+ xy.redx = x_red;
+ xy.redy = y_red;
+ xy.greenx = x_green;
+ xy.greeny = y_green;
+ xy.bluex = x_blue;
+ xy.bluey = y_blue;
+ xy.whitex = x_white;
+ xy.whitey = y_white;
+
+ if (png_XYZ_from_xy_checked(png_ptr, &XYZ, xy))
{
- /* The y values are chromaticities: Y/X+Y+Z, the weights for the gray
- * transformation are simply the normalized Y values for red, green and
- * blue scaled by 32768.
+ /* The success case, because XYZ_from_xy normalises to a reference
+ * white Y of 1.0 we just need to scale the numbers. This should
+ * always work just fine. It is an internal error if this overflows.
*/
- png_uint_32 w = y_red + y_green + y_blue;
-
- png_ptr->rgb_to_gray_red_coeff = (png_uint_16)(((png_uint_32)y_red *
- 32768)/w);
- png_ptr->rgb_to_gray_green_coeff = (png_uint_16)(((png_uint_32)y_green
- * 32768)/w);
- png_ptr->rgb_to_gray_blue_coeff = (png_uint_16)(((png_uint_32)y_blue *
- 32768)/w);
+ {
+ png_fixed_point r, g, b;
+ if (png_muldiv(&r, XYZ.redY, 32768, PNG_FP_1) &&
+ r >= 0 && r <= 32768 &&
+ png_muldiv(&g, XYZ.greenY, 32768, PNG_FP_1) &&
+ g >= 0 && g <= 32768 &&
+ png_muldiv(&b, XYZ.blueY, 32768, PNG_FP_1) &&
+ b >= 0 && b <= 32768 &&
+ r+g+b <= 32769)
+ {
+ /* We allow 0 coefficients here. r+g+b may be 32769 if two or
+ * all of the coefficients were rounded up. Handle this by
+ * reducing the *largest* coefficient by 1; this matches the
+ * approach used for the default coefficients in pngrtran.c
+ */
+ int add = 0;
+
+ if (r+g+b > 32768)
+ add = -1;
+ else if (r+g+b < 32768)
+ add = 1;
+
+ if (add != 0)
+ {
+ if (g >= r && g >= b)
+ g += add;
+ else if (r >= g && r >= b)
+ r += add;
+ else
+ b += add;
+ }
+
+ /* Check for an internal error. */
+ if (r+g+b != 32768)
+ png_error(png_ptr,
+ "internal error handling cHRM coefficients");
+
+ png_ptr->rgb_to_gray_red_coeff = (png_uint_16)r;
+ png_ptr->rgb_to_gray_green_coeff = (png_uint_16)g;
+ }
+
+ /* This is a png_error at present even though it could be ignored -
+ * it should never happen, but it is important that if it does, the
+ * bug is fixed.
+ */
+ else
+ png_error(png_ptr, "internal error handling cHRM->XYZ");
+ }
}
}
#endif
@@ -1106,7 +1156,7 @@ png_handle_sRGB(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) #if defined(PNG_READ_gAMA_SUPPORTED) && defined(PNG_READ_GAMMA_SUPPORTED)
if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_gAMA))
{
- if (PNG_OUT_OF_RANGE(info_ptr->gamma, 45500L, 500))
+ if (PNG_OUT_OF_RANGE(info_ptr->gamma, 45500, 500))
{
PNG_WARNING_PARAMETERS(p)
@@ -1123,10 +1173,10 @@ png_handle_sRGB(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM))
if (PNG_OUT_OF_RANGE(info_ptr->x_white, 31270, 1000) ||
PNG_OUT_OF_RANGE(info_ptr->y_white, 32900, 1000) ||
- PNG_OUT_OF_RANGE(info_ptr->x_red, 64000L, 1000) ||
+ PNG_OUT_OF_RANGE(info_ptr->x_red, 64000, 1000) ||
PNG_OUT_OF_RANGE(info_ptr->y_red, 33000, 1000) ||
PNG_OUT_OF_RANGE(info_ptr->x_green, 30000, 1000) ||
- PNG_OUT_OF_RANGE(info_ptr->y_green, 60000L, 1000) ||
+ PNG_OUT_OF_RANGE(info_ptr->y_green, 60000, 1000) ||
PNG_OUT_OF_RANGE(info_ptr->x_blue, 15000, 1000) ||
PNG_OUT_OF_RANGE(info_ptr->y_blue, 6000, 1000))
{
@@ -1135,6 +1185,47 @@ png_handle_sRGB(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) }
#endif /* PNG_READ_cHRM_SUPPORTED */
+ /* This is recorded for use when handling the cHRM chunk above. An sRGB
+ * chunk unconditionally overwrites the coefficients for grayscale conversion
+ * too.
+ */
+ png_ptr->is_sRGB = 1;
+
+# ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED
+ /* Don't overwrite user supplied values: */
+ if (!png_ptr->rgb_to_gray_coefficients_set)
+ {
+ /* These numbers come from the sRGB specification (or, since one has to
+ * pay much money to get a copy, the wikipedia sRGB page) the
+ * chromaticity values quoted have been inverted to get the reverse
+ * transformation from RGB to XYZ and the 'Y' coefficients scaled by
+ * 32768 (then rounded).
+ *
+ * sRGB and ITU Rec-709 both truncate the values for the D65 white
+ * point to four digits and, even though it actually stores five
+ * digits, the PNG spec gives the truncated value.
+ *
+ * This means that when the chromaticities are converted back to XYZ
+ * end points we end up with (6968,23435,2366), which, as described in
+ * pngrtran.c, would overflow. If the five digit precision and up is
+ * used we get, instead:
+ *
+ * 6968*R + 23435*G + 2365*B
+ *
+ * (Notice that this rounds the blue coefficient down, rather than the
+ * choice used in pngrtran.c which is to round the green one down.)
+ */
+ png_ptr->rgb_to_gray_red_coeff = 6968; /* 0.212639005871510 */
+ png_ptr->rgb_to_gray_green_coeff = 23434; /* 0.715168678767756 */
+ /* png_ptr->rgb_to_gray_blue_coeff = 2366; 0.072192315360734 */
+
+ /* The following keeps the cHRM chunk from destroying the
+ * coefficients again in the event that it follows the sRGB chunk.
+ */
+ png_ptr->rgb_to_gray_coefficients_set = 1;
+ }
+# endif
+
png_set_sRGB_gAMA_and_cHRM(png_ptr, info_ptr, intent);
}
#endif /* PNG_READ_sRGB_SUPPORTED */
@@ -1186,7 +1277,7 @@ png_handle_iCCP(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) png_free(png_ptr, png_ptr->chunkdata);
png_ptr->chunkdata = (png_charp)png_malloc(png_ptr, length + 1);
- slength = (png_size_t)length;
+ slength = length;
png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength);
if (png_crc_finish(png_ptr, skip))
@@ -1336,7 +1427,7 @@ png_handle_sPLT(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) * that the PNG_MAX_MALLOC_64K test is enabled in this case, but this is a
* potential breakage point if the types in pngconf.h aren't exactly right.
*/
- slength = (png_size_t)length;
+ slength = length;
png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength);
if (png_crc_finish(png_ptr, skip))
@@ -1863,7 +1954,7 @@ png_handle_pCAL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) return;
}
- slength = (png_size_t)length;
+ slength = length;
png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength);
if (png_crc_finish(png_ptr, 0))
@@ -2012,7 +2103,7 @@ png_handle_sCAL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) return;
}
- slength = (png_size_t)length;
+ slength = length;
png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength);
png_ptr->chunkdata[slength] = 0x00; /* Null terminate the last string */
@@ -2172,7 +2263,7 @@ png_handle_tEXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) return;
}
- slength = (png_size_t)length;
+ slength = length;
png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength);
if (png_crc_finish(png_ptr, skip))
@@ -2280,7 +2371,7 @@ png_handle_zTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) return;
}
- slength = (png_size_t)length;
+ slength = length;
png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength);
if (png_crc_finish(png_ptr, 0))
@@ -2411,7 +2502,7 @@ png_handle_iTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) return;
}
- slength = (png_size_t)length;
+ slength = length;
png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength);
if (png_crc_finish(png_ptr, 0))
@@ -2447,6 +2538,14 @@ png_handle_iTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) comp_type = *lang++;
}
+ if (comp_type || (comp_flag && comp_flag != PNG_TEXT_COMPRESSION_zTXt))
+ {
+ png_warning(png_ptr, "Unknown iTXt compression type or method");
+ png_free(png_ptr, png_ptr->chunkdata);
+ png_ptr->chunkdata = NULL;
+ return;
+ }
+
for (lang_key = lang; *lang_key; lang_key++)
/* Empty loop */ ;
@@ -2547,16 +2646,14 @@ png_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) if (png_ptr->mode & PNG_HAVE_IDAT)
{
- PNG_IDAT;
-
- if (png_memcmp(png_ptr->chunk_name, png_IDAT, 4)) /* Not an IDAT */
+ if (png_ptr->chunk_name != png_IDAT)
png_ptr->mode |= PNG_AFTER_IDAT;
}
- if (!(png_ptr->chunk_name[0] & 0x20))
+ if (PNG_CHUNK_CRITICAL(png_ptr->chunk_name))
{
#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
- if (png_handle_as_unknown(png_ptr, png_ptr->chunk_name) !=
+ if (png_chunk_unknown_handling(png_ptr, png_ptr->chunk_name) !=
PNG_HANDLE_CHUNK_ALWAYS
#ifdef PNG_READ_USER_CHUNKS_SUPPORTED
&& png_ptr->read_user_chunk_fn == NULL
@@ -2574,21 +2671,20 @@ png_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) )
{
#ifdef PNG_MAX_MALLOC_64K
- if (length > (png_uint_32)65535L)
+ if (length > 65535)
{
png_warning(png_ptr, "unknown chunk too large to fit in memory");
- skip = length - (png_uint_32)65535L;
- length = (png_uint_32)65535L;
+ skip = length - 65535;
+ length = 65535;
}
#endif
- png_memcpy((png_charp)png_ptr->unknown_chunk.name,
- (png_charp)png_ptr->chunk_name,
- png_sizeof(png_ptr->unknown_chunk.name));
-
- png_ptr->unknown_chunk.name[png_sizeof(png_ptr->unknown_chunk.name)-1]
- = '\0';
-
+ /* TODO: this code is very close to the unknown handling in pngpread.c,
+ * maybe it can be put into a common utility routine?
+ * png_struct::unknown_chunk is just used as a temporary variable, along
+ * with the data into which the chunk is read. These can be eliminated.
+ */
+ PNG_CSTRING_FROM_CHUNK(png_ptr->unknown_chunk.name, png_ptr->chunk_name);
png_ptr->unknown_chunk.size = (png_size_t)length;
if (length == 0)
@@ -2597,7 +2693,7 @@ png_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) else
{
png_ptr->unknown_chunk.data = (png_bytep)png_malloc(png_ptr, length);
- png_crc_read(png_ptr, (png_bytep)png_ptr->unknown_chunk.data, length);
+ png_crc_read(png_ptr, png_ptr->unknown_chunk.data, length);
}
#ifdef PNG_READ_USER_CHUNKS_SUPPORTED
@@ -2614,10 +2710,10 @@ png_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) if (ret == 0)
{
- if (!(png_ptr->chunk_name[0] & 0x20))
+ if (PNG_CHUNK_CRITICAL(png_ptr->chunk_name))
{
#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
- if (png_handle_as_unknown(png_ptr, png_ptr->chunk_name) !=
+ if (png_chunk_unknown_handling(png_ptr, png_ptr->chunk_name) !=
PNG_HANDLE_CHUNK_ALWAYS)
#endif
png_chunk_error(png_ptr, "unknown critical chunk");
@@ -2654,267 +2750,523 @@ png_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) * the chunk name itself is valid.
*/
-#define isnonalpha(c) ((c) < 65 || (c) > 122 || ((c) > 90 && (c) < 97))
+/* Bit hacking: the test for an invalid byte in the 4 byte chunk name is:
+ *
+ * ((c) < 65 || (c) > 122 || ((c) > 90 && (c) < 97))
+ */
void /* PRIVATE */
-png_check_chunk_name(png_structp png_ptr, png_const_bytep chunk_name)
+png_check_chunk_name(png_structp png_ptr, png_uint_32 chunk_name)
{
+ int i;
+
png_debug(1, "in png_check_chunk_name");
- if (isnonalpha(chunk_name[0]) || isnonalpha(chunk_name[1]) ||
- isnonalpha(chunk_name[2]) || isnonalpha(chunk_name[3]))
+
+ for (i=1; i<=4; ++i)
{
- png_chunk_error(png_ptr, "invalid chunk type");
+ int c = chunk_name & 0xff;
+
+ if (c < 65 || c > 122 || (c > 90 && c < 97))
+ png_chunk_error(png_ptr, "invalid chunk type");
+
+ chunk_name >>= 8;
}
}
-/* Combines the row recently read in with the existing pixels in the
- * row. This routine takes care of alpha and transparency if requested.
- * This routine also handles the two methods of progressive display
- * of interlaced images, depending on the mask value.
- * The mask value describes which pixels are to be combined with
- * the row. The pattern always repeats every 8 pixels, so just 8
- * bits are needed. A one indicates the pixel is to be combined,
- * a zero indicates the pixel is to be skipped. This is in addition
- * to any alpha or transparency value associated with the pixel. If
- * you want all pixels to be combined, pass 0xff (255) in mask.
+/* Combines the row recently read in with the existing pixels in the row. This
+ * routine takes care of alpha and transparency if requested. This routine also
+ * handles the two methods of progressive display of interlaced images,
+ * depending on the 'display' value; if 'display' is true then the whole row
+ * (dp) is filled from the start by replicating the available pixels. If
+ * 'display' is false only those pixels present in the pass are filled in.
*/
-
void /* PRIVATE */
-png_combine_row(png_structp png_ptr, png_bytep row, int mask)
+png_combine_row(png_structp png_ptr, png_bytep dp, int display)
{
+ unsigned int pixel_depth = png_ptr->transformed_pixel_depth;
+ png_const_bytep sp = png_ptr->row_buf + 1;
+ png_uint_32 row_width = png_ptr->width;
+ unsigned int pass = png_ptr->pass;
+ png_bytep end_ptr = 0;
+ png_byte end_byte = 0;
+ unsigned int end_mask;
+
png_debug(1, "in png_combine_row");
- /* Added in 1.5.4: the row_info should match the information returned by any
- * call to png_read_update_info at this point. Do not continue if we got
+ /* Added in 1.5.6: it should not be possible to enter this routine until at
+ * least one row has been read from the PNG data and transformed.
+ */
+ if (pixel_depth == 0)
+ png_error(png_ptr, "internal row logic error");
+
+ /* Added in 1.5.4: the pixel depth should match the information returned by
+ * any call to png_read_update_info at this point. Do not continue if we got
* this wrong.
*/
if (png_ptr->info_rowbytes != 0 && png_ptr->info_rowbytes !=
- PNG_ROWBYTES(png_ptr->row_info.pixel_depth, png_ptr->width))
+ PNG_ROWBYTES(pixel_depth, row_width))
png_error(png_ptr, "internal row size calculation error");
- if (mask == 0xff)
+ /* Don't expect this to ever happen: */
+ if (row_width == 0)
+ png_error(png_ptr, "internal row width error");
+
+ /* Preserve the last byte in cases where only part of it will be overwritten,
+ * the multiply below may overflow, we don't care because ANSI-C guarantees
+ * we get the low bits.
+ */
+ end_mask = (pixel_depth * row_width) & 7;
+ if (end_mask != 0)
{
- png_memcpy(row, png_ptr->row_buf + 1,
- PNG_ROWBYTES(png_ptr->row_info.pixel_depth, png_ptr->width));
+ /* end_ptr == NULL is a flag to say do nothing */
+ end_ptr = dp + PNG_ROWBYTES(pixel_depth, row_width) - 1;
+ end_byte = *end_ptr;
+# ifdef PNG_READ_PACKSWAP_SUPPORTED
+ if (png_ptr->transformations & PNG_PACKSWAP) /* little-endian byte */
+ end_mask = 0xff << end_mask;
+
+ else /* big-endian byte */
+# endif
+ end_mask = 0xff >> end_mask;
+ /* end_mask is now the bits to *keep* from the destination row */
}
- else
+ /* For non-interlaced images this reduces to a png_memcpy(). A png_memcpy()
+ * will also happen if interlacing isn't supported or if the application
+ * does not call png_set_interlace_handling(). In the latter cases the
+ * caller just gets a sequence of the unexpanded rows from each interlace
+ * pass.
+ */
+#ifdef PNG_READ_INTERLACING_SUPPORTED
+ if (png_ptr->interlaced && (png_ptr->transformations & PNG_INTERLACE) &&
+ pass < 6 && (display == 0 ||
+ /* The following copies everything for 'display' on passes 0, 2 and 4. */
+ (display == 1 && (pass & 1) != 0)))
{
- switch (png_ptr->row_info.pixel_depth)
- {
- case 1:
- {
- png_bytep sp = png_ptr->row_buf + 1;
- png_bytep dp = row;
- int s_inc, s_start, s_end;
- int m = 0x80;
- int shift;
- png_uint_32 i;
- png_uint_32 row_width = png_ptr->width;
-
-#ifdef PNG_READ_PACKSWAP_SUPPORTED
- if (png_ptr->transformations & PNG_PACKSWAP)
- {
- s_start = 0;
- s_end = 7;
- s_inc = 1;
- }
+ /* Narrow images may have no bits in a pass; the caller should handle
+ * this, but this test is cheap:
+ */
+ if (row_width <= PNG_PASS_START_COL(pass))
+ return;
- else
-#endif
- {
- s_start = 7;
- s_end = 0;
- s_inc = -1;
- }
+ if (pixel_depth < 8)
+ {
+ /* For pixel depths up to 4 bpp the 8-pixel mask can be expanded to fit
+ * into 32 bits, then a single loop over the bytes using the four byte
+ * values in the 32-bit mask can be used. For the 'display' option the
+ * expanded mask may also not require any masking within a byte. To
+ * make this work the PACKSWAP option must be taken into account - it
+ * simply requires the pixels to be reversed in each byte.
+ *
+ * The 'regular' case requires a mask for each of the first 6 passes,
+ * the 'display' case does a copy for the even passes in the range
+ * 0..6. This has already been handled in the test above.
+ *
+ * The masks are arranged as four bytes with the first byte to use in
+ * the lowest bits (little-endian) regardless of the order (PACKSWAP or
+ * not) of the pixels in each byte.
+ *
+ * NOTE: the whole of this logic depends on the caller of this function
+ * only calling it on rows appropriate to the pass. This function only
+ * understands the 'x' logic; the 'y' logic is handled by the caller.
+ *
+ * The following defines allow generation of compile time constant bit
+ * masks for each pixel depth and each possibility of swapped or not
+ * swapped bytes. Pass 'p' is in the range 0..6; 'x', a pixel index,
+ * is in the range 0..7; and the result is 1 if the pixel is to be
+ * copied in the pass, 0 if not. 'S' is for the sparkle method, 'B'
+ * for the block method.
+ *
+ * With some compilers a compile time expression of the general form:
+ *
+ * (shift >= 32) ? (a >> (shift-32)) : (b >> shift)
+ *
+ * Produces warnings with values of 'shift' in the range 33 to 63
+ * because the right hand side of the ?: expression is evaluated by
+ * the compiler even though it isn't used. Microsoft Visual C (various
+ * versions) and the Intel C compiler are known to do this. To avoid
+ * this the following macros are used in 1.5.6. This is a temporary
+ * solution to avoid destabilizing the code during the release process.
+ */
+# if PNG_USE_COMPILE_TIME_MASKS
+# define PNG_LSR(x,s) ((x)>>((s) & 0x1f))
+# define PNG_LSL(x,s) ((x)<<((s) & 0x1f))
+# else
+# define PNG_LSR(x,s) ((x)>>(s))
+# define PNG_LSL(x,s) ((x)<<(s))
+# endif
+# define S_COPY(p,x) (((p)<4 ? PNG_LSR(0x80088822,(3-(p))*8+(7-(x))) :\
+ PNG_LSR(0xaa55ff00,(7-(p))*8+(7-(x)))) & 1)
+# define B_COPY(p,x) (((p)<4 ? PNG_LSR(0xff0fff33,(3-(p))*8+(7-(x))) :\
+ PNG_LSR(0xff55ff00,(7-(p))*8+(7-(x)))) & 1)
+
+ /* Return a mask for pass 'p' pixel 'x' at depth 'd'. The mask is
+ * little endian - the first pixel is at bit 0 - however the extra
+ * parameter 's' can be set to cause the mask position to be swapped
+ * within each byte, to match the PNG format. This is done by XOR of
+ * the shift with 7, 6 or 4 for bit depths 1, 2 and 4.
+ */
+# define PIXEL_MASK(p,x,d,s) \
+ (PNG_LSL(((PNG_LSL(1U,(d)))-1),(((x)*(d))^((s)?8-(d):0))))
- shift = s_start;
+ /* Hence generate the appropriate 'block' or 'sparkle' pixel copy mask.
+ */
+# define S_MASKx(p,x,d,s) (S_COPY(p,x)?PIXEL_MASK(p,x,d,s):0)
+# define B_MASKx(p,x,d,s) (B_COPY(p,x)?PIXEL_MASK(p,x,d,s):0)
- for (i = 0; i < row_width; i++)
- {
- if (m & mask)
- {
- int value;
+ /* Combine 8 of these to get the full mask. For the 1-bpp and 2-bpp
+ * cases the result needs replicating, for the 4-bpp case the above
+ * generates a full 32 bits.
+ */
+# define MASK_EXPAND(m,d) ((m)*((d)==1?0x01010101:((d)==2?0x00010001:1)))
- value = (*sp >> shift) & 0x01;
- *dp &= (png_byte)((0x7f7f >> (7 - shift)) & 0xff);
- *dp |= (png_byte)(value << shift);
- }
+# define S_MASK(p,d,s) MASK_EXPAND(S_MASKx(p,0,d,s) + S_MASKx(p,1,d,s) +\
+ S_MASKx(p,2,d,s) + S_MASKx(p,3,d,s) + S_MASKx(p,4,d,s) +\
+ S_MASKx(p,5,d,s) + S_MASKx(p,6,d,s) + S_MASKx(p,7,d,s), d)
- if (shift == s_end)
- {
- shift = s_start;
- sp++;
- dp++;
- }
+# define B_MASK(p,d,s) MASK_EXPAND(B_MASKx(p,0,d,s) + B_MASKx(p,1,d,s) +\
+ B_MASKx(p,2,d,s) + B_MASKx(p,3,d,s) + B_MASKx(p,4,d,s) +\
+ B_MASKx(p,5,d,s) + B_MASKx(p,6,d,s) + B_MASKx(p,7,d,s), d)
- else
- shift += s_inc;
+#if PNG_USE_COMPILE_TIME_MASKS
+ /* Utility macros to construct all the masks for a depth/swap
+ * combination. The 's' parameter says whether the format is PNG
+ * (big endian bytes) or not. Only the three odd-numbered passes are
+ * required for the display/block algorithm.
+ */
+# define S_MASKS(d,s) { S_MASK(0,d,s), S_MASK(1,d,s), S_MASK(2,d,s),\
+ S_MASK(3,d,s), S_MASK(4,d,s), S_MASK(5,d,s) }
- if (m == 1)
- m = 0x80;
+# define B_MASKS(d,s) { B_MASK(1,d,s), S_MASK(3,d,s), S_MASK(5,d,s) }
- else
- m >>= 1;
- }
- break;
- }
+# define DEPTH_INDEX(d) ((d)==1?0:((d)==2?1:2))
- case 2:
+ /* Hence the pre-compiled masks indexed by PACKSWAP (or not), depth and
+ * then pass:
+ */
+ static PNG_CONST png_uint_32 row_mask[2/*PACKSWAP*/][3/*depth*/][6] =
{
- png_bytep sp = png_ptr->row_buf + 1;
- png_bytep dp = row;
- int s_start, s_end, s_inc;
- int m = 0x80;
- int shift;
- png_uint_32 i;
- png_uint_32 row_width = png_ptr->width;
- int value;
+ /* Little-endian byte masks for PACKSWAP */
+ { S_MASKS(1,0), S_MASKS(2,0), S_MASKS(4,0) },
+ /* Normal (big-endian byte) masks - PNG format */
+ { S_MASKS(1,1), S_MASKS(2,1), S_MASKS(4,1) }
+ };
+
+ /* display_mask has only three entries for the odd passes, so index by
+ * pass>>1.
+ */
+ static PNG_CONST png_uint_32 display_mask[2][3][3] =
+ {
+ /* Little-endian byte masks for PACKSWAP */
+ { B_MASKS(1,0), B_MASKS(2,0), B_MASKS(4,0) },
+ /* Normal (big-endian byte) masks - PNG format */
+ { B_MASKS(1,1), B_MASKS(2,1), B_MASKS(4,1) }
+ };
+
+# define MASK(pass,depth,display,png)\
+ ((display)?display_mask[png][DEPTH_INDEX(depth)][pass>>1]:\
+ row_mask[png][DEPTH_INDEX(depth)][pass])
+
+#else /* !PNG_USE_COMPILE_TIME_MASKS */
+ /* This is the runtime alternative: it seems unlikely that this will
+ * ever be either smaller or faster than the compile time approach.
+ */
+# define MASK(pass,depth,display,png)\
+ ((display)?B_MASK(pass,depth,png):S_MASK(pass,depth,png))
+#endif /* !PNG_USE_COMPILE_TIME_MASKS */
+
+ /* Use the appropriate mask to copy the required bits. In some cases
+ * the byte mask will be 0 or 0xff, optimize these cases. row_width is
+ * the number of pixels, but the code copies bytes, so it is necessary
+ * to special case the end.
+ */
+ png_uint_32 pixels_per_byte = 8 / pixel_depth;
+ png_uint_32 mask;
-#ifdef PNG_READ_PACKSWAP_SUPPORTED
+# ifdef PNG_READ_PACKSWAP_SUPPORTED
if (png_ptr->transformations & PNG_PACKSWAP)
- {
- s_start = 0;
- s_end = 6;
- s_inc = 2;
- }
+ mask = MASK(pass, pixel_depth, display, 0);
else
-#endif
+# endif
+ mask = MASK(pass, pixel_depth, display, 1);
+
+ for (;;)
+ {
+ png_uint_32 m;
+
+ /* It doesn't matter in the following if png_uint_32 has more than
+ * 32 bits because the high bits always match those in m<<24; it is,
+ * however, essential to use OR here, not +, because of this.
+ */
+ m = mask;
+ mask = (m >> 8) | (m << 24); /* rotate right to good compilers */
+ m &= 0xff;
+
+ if (m != 0) /* something to copy */
{
- s_start = 6;
- s_end = 0;
- s_inc = -2;
+ if (m != 0xff)
+ *dp = (png_byte)((*dp & ~m) | (*sp & m));
+ else
+ *dp = *sp;
}
- shift = s_start;
+ /* NOTE: this may overwrite the last byte with garbage if the image
+ * is not an exact number of bytes wide; libpng has always done
+ * this.
+ */
+ if (row_width <= pixels_per_byte)
+ break; /* May need to restore part of the last byte */
- for (i = 0; i < row_width; i++)
- {
- if (m & mask)
- {
- value = (*sp >> shift) & 0x03;
- *dp &= (png_byte)((0x3f3f >> (6 - shift)) & 0xff);
- *dp |= (png_byte)(value << shift);
- }
+ row_width -= pixels_per_byte;
+ ++dp;
+ ++sp;
+ }
+ }
- if (shift == s_end)
- {
- shift = s_start;
- sp++;
- dp++;
- }
+ else /* pixel_depth >= 8 */
+ {
+ unsigned int bytes_to_copy, bytes_to_jump;
- else
- shift += s_inc;
+ /* Validate the depth - it must be a multiple of 8 */
+ if (pixel_depth & 7)
+ png_error(png_ptr, "invalid user transform pixel depth");
- if (m == 1)
- m = 0x80;
+ pixel_depth >>= 3; /* now in bytes */
+ row_width *= pixel_depth;
- else
- m >>= 1;
- }
- break;
+ /* Regardless of pass number the Adam 7 interlace always results in a
+ * fixed number of pixels to copy then to skip. There may be a
+ * different number of pixels to skip at the start though.
+ */
+ {
+ unsigned int offset = PNG_PASS_START_COL(pass) * pixel_depth;
+
+ row_width -= offset;
+ dp += offset;
+ sp += offset;
}
- case 4:
+ /* Work out the bytes to copy. */
+ if (display)
{
- png_bytep sp = png_ptr->row_buf + 1;
- png_bytep dp = row;
- int s_start, s_end, s_inc;
- int m = 0x80;
- int shift;
- png_uint_32 i;
- png_uint_32 row_width = png_ptr->width;
- int value;
+ /* When doing the 'block' algorithm the pixel in the pass gets
+ * replicated to adjacent pixels. This is why the even (0,2,4,6)
+ * passes are skipped above - the entire expanded row is copied.
+ */
+ bytes_to_copy = (1<<((6-pass)>>1)) * pixel_depth;
-#ifdef PNG_READ_PACKSWAP_SUPPORTED
- if (png_ptr->transformations & PNG_PACKSWAP)
- {
- s_start = 0;
- s_end = 4;
- s_inc = 4;
- }
+ /* But don't allow this number to exceed the actual row width. */
+ if (bytes_to_copy > row_width)
+ bytes_to_copy = row_width;
+ }
- else
-#endif
- {
- s_start = 4;
- s_end = 0;
- s_inc = -4;
- }
- shift = s_start;
+ else /* normal row; Adam7 only ever gives us one pixel to copy. */
+ bytes_to_copy = pixel_depth;
- for (i = 0; i < row_width; i++)
- {
- if (m & mask)
+ /* In Adam7 there is a constant offset between where the pixels go. */
+ bytes_to_jump = PNG_PASS_COL_OFFSET(pass) * pixel_depth;
+
+ /* And simply copy these bytes. Some optimization is possible here,
+ * depending on the value of 'bytes_to_copy'. Special case the low
+ * byte counts, which we know to be frequent.
+ *
+ * Notice that these cases all 'return' rather than 'break' - this
+ * avoids an unnecessary test on whether to restore the last byte
+ * below.
+ */
+ switch (bytes_to_copy)
+ {
+ case 1:
+ for (;;)
{
- value = (*sp >> shift) & 0xf;
- *dp &= (png_byte)((0xf0f >> (4 - shift)) & 0xff);
- *dp |= (png_byte)(value << shift);
+ *dp = *sp;
+
+ if (row_width <= bytes_to_jump)
+ return;
+
+ dp += bytes_to_jump;
+ sp += bytes_to_jump;
+ row_width -= bytes_to_jump;
}
- if (shift == s_end)
+ case 2:
+ /* There is a possibility of a partial copy at the end here; this
+ * slows the code down somewhat.
+ */
+ do
{
- shift = s_start;
- sp++;
- dp++;
+ dp[0] = sp[0], dp[1] = sp[1];
+
+ if (row_width <= bytes_to_jump)
+ return;
+
+ sp += bytes_to_jump;
+ dp += bytes_to_jump;
+ row_width -= bytes_to_jump;
}
+ while (row_width > 1);
- else
- shift += s_inc;
+ /* And there can only be one byte left at this point: */
+ *dp = *sp;
+ return;
- if (m == 1)
- m = 0x80;
+ case 3:
+ /* This can only be the RGB case, so each copy is exactly one
+ * pixel and it is not necessary to check for a partial copy.
+ */
+ for(;;)
+ {
+ dp[0] = sp[0], dp[1] = sp[1], dp[2] = sp[2];
- else
- m >>= 1;
- }
- break;
- }
+ if (row_width <= bytes_to_jump)
+ return;
- default:
- {
- png_bytep sp = png_ptr->row_buf + 1;
- png_bytep dp = row;
- png_size_t pixel_bytes = (png_ptr->row_info.pixel_depth >> 3);
- png_uint_32 i;
- png_uint_32 row_width = png_ptr->width;
- png_byte m = 0x80;
+ sp += bytes_to_jump;
+ dp += bytes_to_jump;
+ row_width -= bytes_to_jump;
+ }
- for (i = 0; i < row_width; i++)
- {
- if (m & mask)
+ default:
+#if PNG_ALIGN_TYPE != PNG_ALIGN_NONE
+ /* Check for double byte alignment and, if possible, use a
+ * 16-bit copy. Don't attempt this for narrow images - ones that
+ * are less than an interlace panel wide. Don't attempt it for
+ * wide bytes_to_copy either - use the png_memcpy there.
+ */
+ if (bytes_to_copy < 16 /*else use png_memcpy*/ &&
+ png_isaligned(dp, png_uint_16) &&
+ png_isaligned(sp, png_uint_16) &&
+ bytes_to_copy % sizeof (png_uint_16) == 0 &&
+ bytes_to_jump % sizeof (png_uint_16) == 0)
{
- png_memcpy(dp, sp, pixel_bytes);
+ /* Everything is aligned for png_uint_16 copies, but try for
+ * png_uint_32 first.
+ */
+ if (png_isaligned(dp, png_uint_32) &&
+ png_isaligned(sp, png_uint_32) &&
+ bytes_to_copy % sizeof (png_uint_32) == 0 &&
+ bytes_to_jump % sizeof (png_uint_32) == 0)
+ {
+ png_uint_32p dp32 = (png_uint_32p)dp;
+ png_const_uint_32p sp32 = (png_const_uint_32p)sp;
+ unsigned int skip = (bytes_to_jump-bytes_to_copy) /
+ sizeof (png_uint_32);
+
+ do
+ {
+ size_t c = bytes_to_copy;
+ do
+ {
+ *dp32++ = *sp32++;
+ c -= sizeof (png_uint_32);
+ }
+ while (c > 0);
+
+ if (row_width <= bytes_to_jump)
+ return;
+
+ dp32 += skip;
+ sp32 += skip;
+ row_width -= bytes_to_jump;
+ }
+ while (bytes_to_copy <= row_width);
+
+ /* Get to here when the row_width truncates the final copy.
+ * There will be 1-3 bytes left to copy, so don't try the
+ * 16-bit loop below.
+ */
+ dp = (png_bytep)dp32;
+ sp = (png_const_bytep)sp32;
+ do
+ *dp++ = *sp++;
+ while (--row_width > 0);
+ return;
+ }
+
+ /* Else do it in 16-bit quantities, but only if the size is
+ * not too large.
+ */
+ else
+ {
+ png_uint_16p dp16 = (png_uint_16p)dp;
+ png_const_uint_16p sp16 = (png_const_uint_16p)sp;
+ unsigned int skip = (bytes_to_jump-bytes_to_copy) /
+ sizeof (png_uint_16);
+
+ do
+ {
+ size_t c = bytes_to_copy;
+ do
+ {
+ *dp16++ = *sp16++;
+ c -= sizeof (png_uint_16);
+ }
+ while (c > 0);
+
+ if (row_width <= bytes_to_jump)
+ return;
+
+ dp16 += skip;
+ sp16 += skip;
+ row_width -= bytes_to_jump;
+ }
+ while (bytes_to_copy <= row_width);
+
+ /* End of row - 1 byte left, bytes_to_copy > row_width: */
+ dp = (png_bytep)dp16;
+ sp = (png_const_bytep)sp16;
+ do
+ *dp++ = *sp++;
+ while (--row_width > 0);
+ return;
+ }
}
+#endif /* PNG_ALIGN_ code */
- sp += pixel_bytes;
- dp += pixel_bytes;
+ /* The true default - use a png_memcpy: */
+ for (;;)
+ {
+ png_memcpy(dp, sp, bytes_to_copy);
- if (m == 1)
- m = 0x80;
+ if (row_width <= bytes_to_jump)
+ return;
- else
- m >>= 1;
- }
- break;
+ sp += bytes_to_jump;
+ dp += bytes_to_jump;
+ row_width -= bytes_to_jump;
+ if (bytes_to_copy > row_width)
+ bytes_to_copy = row_width;
+ }
}
- }
+
+ /* NOT REACHED*/
+ } /* pixel_depth >= 8 */
+
+ /* Here if pixel_depth < 8 to check 'end_ptr' below. */
}
+ else
+#endif
+
+ /* If here then the switch above wasn't used so just png_memcpy the whole row
+ * from the temporary row buffer (notice that this overwrites the end of the
+ * destination row if it is a partial byte.)
+ */
+ png_memcpy(dp, sp, PNG_ROWBYTES(pixel_depth, row_width));
+
+ /* Restore the overwritten bits from the last byte if necessary. */
+ if (end_ptr != NULL)
+ *end_ptr = (png_byte)((end_byte & end_mask) | (*end_ptr & ~end_mask));
}
#ifdef PNG_READ_INTERLACING_SUPPORTED
void /* PRIVATE */
-png_do_read_interlace(png_structp png_ptr)
+png_do_read_interlace(png_row_infop row_info, png_bytep row, int pass,
+ png_uint_32 transformations /* Because these may affect the byte layout */)
{
- png_row_infop row_info = &(png_ptr->row_info);
- png_bytep row = png_ptr->row_buf + 1;
- int pass = png_ptr->pass;
- png_uint_32 transformations = png_ptr->transformations;
/* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */
/* Offset to next interlace block */
- PNG_CONST int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
+ static PNG_CONST int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
png_debug(1, "in png_do_read_interlace");
if (row != NULL && row_info != NULL)
@@ -3079,7 +3431,7 @@ png_do_read_interlace(png_structp png_ptr) for (i = 0; i < row_info->width; i++)
{
- png_byte v = (png_byte)((*sp >> sshift) & 0xf);
+ png_byte v = (png_byte)((*sp >> sshift) & 0x0f);
int j;
for (j = 0; j < jstop; j++)
@@ -3108,6 +3460,7 @@ png_do_read_interlace(png_structp png_ptr) }
break;
}
+
default:
{
png_size_t pixel_bytes = (row_info->pixel_depth >> 3);
@@ -3138,6 +3491,7 @@ png_do_read_interlace(png_structp png_ptr) break;
}
}
+
row_info->width = final_width;
row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth, final_width);
}
@@ -3147,132 +3501,252 @@ png_do_read_interlace(png_structp png_ptr) }
#endif /* PNG_READ_INTERLACING_SUPPORTED */
-void /* PRIVATE */
-png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep row,
- png_const_bytep prev_row, int filter)
+static void
+png_read_filter_row_sub(png_row_infop row_info, png_bytep row,
+ png_const_bytep prev_row)
{
- png_debug(1, "in png_read_filter_row");
- png_debug2(2, "row = %u, filter = %d", png_ptr->row_number, filter);
- switch (filter)
+ png_size_t i;
+ png_size_t istop = row_info->rowbytes;
+ unsigned int bpp = (row_info->pixel_depth + 7) >> 3;
+ png_bytep rp = row + bpp;
+
+ PNG_UNUSED(prev_row)
+
+ for (i = bpp; i < istop; i++)
{
- case PNG_FILTER_VALUE_NONE:
- break;
+ *rp = (png_byte)(((int)(*rp) + (int)(*(rp-bpp))) & 0xff);
+ rp++;
+ }
+}
- case PNG_FILTER_VALUE_SUB:
- {
- png_size_t i;
- png_size_t istop = row_info->rowbytes;
- unsigned int bpp = (row_info->pixel_depth + 7) >> 3;
- png_bytep rp = row + bpp;
- png_bytep lp = row;
+static void
+png_read_filter_row_up(png_row_infop row_info, png_bytep row,
+ png_const_bytep prev_row)
+{
+ png_size_t i;
+ png_size_t istop = row_info->rowbytes;
+ png_bytep rp = row;
+ png_const_bytep pp = prev_row;
- for (i = bpp; i < istop; i++)
- {
- *rp = (png_byte)(((int)(*rp) + (int)(*lp++)) & 0xff);
- rp++;
- }
- break;
- }
- case PNG_FILTER_VALUE_UP:
- {
- png_size_t i;
- png_size_t istop = row_info->rowbytes;
- png_bytep rp = row;
- png_const_bytep pp = prev_row;
+ for (i = 0; i < istop; i++)
+ {
+ *rp = (png_byte)(((int)(*rp) + (int)(*pp++)) & 0xff);
+ rp++;
+ }
+}
- for (i = 0; i < istop; i++)
- {
- *rp = (png_byte)(((int)(*rp) + (int)(*pp++)) & 0xff);
- rp++;
- }
- break;
- }
- case PNG_FILTER_VALUE_AVG:
- {
- png_size_t i;
- png_bytep rp = row;
- png_const_bytep pp = prev_row;
- png_bytep lp = row;
- unsigned int bpp = (row_info->pixel_depth + 7) >> 3;
- png_size_t istop = row_info->rowbytes - bpp;
-
- for (i = 0; i < bpp; i++)
- {
- *rp = (png_byte)(((int)(*rp) +
- ((int)(*pp++) / 2 )) & 0xff);
+static void
+png_read_filter_row_avg(png_row_infop row_info, png_bytep row,
+ png_const_bytep prev_row)
+{
+ png_size_t i;
+ png_bytep rp = row;
+ png_const_bytep pp = prev_row;
+ unsigned int bpp = (row_info->pixel_depth + 7) >> 3;
+ png_size_t istop = row_info->rowbytes - bpp;
- rp++;
- }
+ for (i = 0; i < bpp; i++)
+ {
+ *rp = (png_byte)(((int)(*rp) +
+ ((int)(*pp++) / 2 )) & 0xff);
- for (i = 0; i < istop; i++)
- {
- *rp = (png_byte)(((int)(*rp) +
- (int)(*pp++ + *lp++) / 2 ) & 0xff);
+ rp++;
+ }
- rp++;
- }
- break;
- }
- case PNG_FILTER_VALUE_PAETH:
- {
- png_size_t i;
- png_bytep rp = row;
- png_const_bytep pp = prev_row;
- png_bytep lp = row;
- png_const_bytep cp = prev_row;
- unsigned int bpp = (row_info->pixel_depth + 7) >> 3;
- png_size_t istop=row_info->rowbytes - bpp;
-
- for (i = 0; i < bpp; i++)
- {
- *rp = (png_byte)(((int)(*rp) + (int)(*pp++)) & 0xff);
- rp++;
- }
+ for (i = 0; i < istop; i++)
+ {
+ *rp = (png_byte)(((int)(*rp) +
+ (int)(*pp++ + *(rp-bpp)) / 2 ) & 0xff);
- for (i = 0; i < istop; i++) /* Use leftover rp,pp */
- {
- int a, b, c, pa, pb, pc, p;
+ rp++;
+ }
+}
- a = *lp++;
- b = *pp++;
- c = *cp++;
+static void
+png_read_filter_row_paeth_1byte_pixel(png_row_infop row_info, png_bytep row,
+ png_const_bytep prev_row)
+{
+ png_bytep rp_end = row + row_info->rowbytes;
+ int a, c;
- p = b - c;
- pc = a - c;
+ /* First pixel/byte */
+ c = *prev_row++;
+ a = *row + c;
+ *row++ = (png_byte)a;
-#ifdef PNG_USE_ABS
- pa = abs(p);
- pb = abs(pc);
- pc = abs(p + pc);
-#else
- pa = p < 0 ? -p : p;
- pb = pc < 0 ? -pc : pc;
- pc = (p + pc) < 0 ? -(p + pc) : p + pc;
-#endif
+ /* Remainder */
+ while (row < rp_end)
+ {
+ int b, pa, pb, pc, p;
- /*
- if (pa <= pb && pa <= pc)
- p = a;
+ a &= 0xff; /* From previous iteration or start */
+ b = *prev_row++;
- else if (pb <= pc)
- p = b;
+ p = b - c;
+ pc = a - c;
- else
- p = c;
- */
+# ifdef PNG_USE_ABS
+ pa = abs(p);
+ pb = abs(pc);
+ pc = abs(p + pc);
+# else
+ pa = p < 0 ? -p : p;
+ pb = pc < 0 ? -pc : pc;
+ pc = (p + pc) < 0 ? -(p + pc) : p + pc;
+# endif
+
+ /* Find the best predictor, the least of pa, pb, pc favoring the earlier
+ * ones in the case of a tie.
+ */
+ if (pb < pa) pa = pb, a = b;
+ if (pc < pa) a = c;
- p = (pa <= pb && pa <= pc) ? a : (pb <= pc) ? b : c;
+ /* Calculate the current pixel in a, and move the previous row pixel to c
+ * for the next time round the loop
+ */
+ c = b;
+ a += *row;
+ *row++ = (png_byte)a;
+ }
+}
- *rp = (png_byte)(((int)(*rp) + p) & 0xff);
- rp++;
- }
+static void
+png_read_filter_row_paeth_multibyte_pixel(png_row_infop row_info, png_bytep row,
+ png_const_bytep prev_row)
+{
+ int bpp = (row_info->pixel_depth + 7) >> 3;
+ png_bytep rp_end = row + bpp;
+
+ /* Process the first pixel in the row completely (this is the same as 'up'
+ * because there is only one candidate predictor for the first row).
+ */
+ while (row < rp_end)
+ {
+ int a = *row + *prev_row++;
+ *row++ = (png_byte)a;
+ }
+
+ /* Remainder */
+ rp_end += row_info->rowbytes - bpp;
+
+ while (row < rp_end)
+ {
+ int a, b, c, pa, pb, pc, p;
+
+ c = *(prev_row - bpp);
+ a = *(row - bpp);
+ b = *prev_row++;
+
+ p = b - c;
+ pc = a - c;
+
+# ifdef PNG_USE_ABS
+ pa = abs(p);
+ pb = abs(pc);
+ pc = abs(p + pc);
+# else
+ pa = p < 0 ? -p : p;
+ pb = pc < 0 ? -pc : pc;
+ pc = (p + pc) < 0 ? -(p + pc) : p + pc;
+# endif
+
+ if (pb < pa) pa = pb, a = b;
+ if (pc < pa) a = c;
+
+ c = b;
+ a += *row;
+ *row++ = (png_byte)a;
+ }
+}
+
+#ifdef PNG_ARM_NEON
+
+#ifdef __linux__
+#include <stdio.h>
+#include <elf.h>
+#include <asm/hwcap.h>
+
+static int png_have_hwcap(unsigned cap)
+{
+ FILE *f = fopen("/proc/self/auxv", "r");
+ Elf32_auxv_t aux;
+ int have_cap = 0;
+
+ if (!f)
+ return 0;
+
+ while (fread(&aux, sizeof(aux), 1, f) > 0)
+ {
+ if (aux.a_type == AT_HWCAP &&
+ aux.a_un.a_val & cap)
+ {
+ have_cap = 1;
break;
}
- default:
- png_error(png_ptr, "Ignoring bad adaptive filter type");
- /*NOT REACHED */
- break;
}
+
+ fclose(f);
+
+ return have_cap;
+}
+#endif /* __linux__ */
+
+static void
+png_init_filter_functions_neon(png_structp pp, unsigned int bpp)
+{
+#ifdef __linux__
+ if (!png_have_hwcap(HWCAP_NEON))
+ return;
+#endif
+
+ pp->read_filter[PNG_FILTER_VALUE_UP-1] = png_read_filter_row_up_neon;
+
+ if (bpp == 3)
+ {
+ pp->read_filter[PNG_FILTER_VALUE_SUB-1] = png_read_filter_row_sub3_neon;
+ pp->read_filter[PNG_FILTER_VALUE_AVG-1] = png_read_filter_row_avg3_neon;
+ pp->read_filter[PNG_FILTER_VALUE_PAETH-1] =
+ png_read_filter_row_paeth3_neon;
+ }
+
+ else if (bpp == 4)
+ {
+ pp->read_filter[PNG_FILTER_VALUE_SUB-1] = png_read_filter_row_sub4_neon;
+ pp->read_filter[PNG_FILTER_VALUE_AVG-1] = png_read_filter_row_avg4_neon;
+ pp->read_filter[PNG_FILTER_VALUE_PAETH-1] =
+ png_read_filter_row_paeth4_neon;
+ }
+}
+#endif /* PNG_ARM_NEON */
+
+static void
+png_init_filter_functions(png_structp pp)
+{
+ unsigned int bpp = (pp->pixel_depth + 7) >> 3;
+
+ pp->read_filter[PNG_FILTER_VALUE_SUB-1] = png_read_filter_row_sub;
+ pp->read_filter[PNG_FILTER_VALUE_UP-1] = png_read_filter_row_up;
+ pp->read_filter[PNG_FILTER_VALUE_AVG-1] = png_read_filter_row_avg;
+ if (bpp == 1)
+ pp->read_filter[PNG_FILTER_VALUE_PAETH-1] =
+ png_read_filter_row_paeth_1byte_pixel;
+ else
+ pp->read_filter[PNG_FILTER_VALUE_PAETH-1] =
+ png_read_filter_row_paeth_multibyte_pixel;
+
+#ifdef PNG_ARM_NEON
+ png_init_filter_functions_neon(pp, bpp);
+#endif
+}
+
+void /* PRIVATE */
+png_read_filter_row(png_structp pp, png_row_infop row_info, png_bytep row,
+ png_const_bytep prev_row, int filter)
+{
+ if (pp->read_filter[0] == NULL)
+ png_init_filter_functions(pp);
+ if (filter > PNG_FILTER_VALUE_NONE && filter < PNG_FILTER_VALUE_LAST)
+ pp->read_filter[filter-1](row_info, row, prev_row);
}
#ifdef PNG_SEQUENTIAL_READ_SUPPORTED
@@ -3283,16 +3757,16 @@ png_read_finish_row(png_structp png_ptr) /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */
/* Start of interlace block */
- PNG_CONST int png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0};
+ static PNG_CONST png_byte png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0};
/* Offset to next interlace block */
- PNG_CONST int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
+ static PNG_CONST png_byte png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
/* Start of interlace block in the y direction */
- PNG_CONST int png_pass_ystart[7] = {0, 0, 4, 0, 2, 0, 1};
+ static PNG_CONST png_byte png_pass_ystart[7] = {0, 0, 4, 0, 2, 0, 1};
/* Offset to next interlace block in the y direction */
- PNG_CONST int png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2};
+ static PNG_CONST png_byte png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2};
#endif /* PNG_READ_INTERLACING_SUPPORTED */
png_debug(1, "in png_read_finish_row");
@@ -3305,6 +3779,9 @@ png_read_finish_row(png_structp png_ptr) {
png_ptr->row_number = 0;
+ /* TO DO: don't do this if prev_row isn't needed (requires
+ * read-ahead of the next row's filter byte.
+ */
png_memset(png_ptr->prev_row, 0, png_ptr->rowbytes + 1);
do
@@ -3339,7 +3816,6 @@ png_read_finish_row(png_structp png_ptr) if (!(png_ptr->flags & PNG_FLAG_ZLIB_FINISHED))
{
- PNG_IDAT;
char extra;
int ret;
@@ -3354,7 +3830,7 @@ png_read_finish_row(png_structp png_ptr) {
png_crc_finish(png_ptr, 0);
png_ptr->idat_size = png_read_chunk_header(png_ptr);
- if (png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
+ if (png_ptr->chunk_name != png_IDAT)
png_error(png_ptr, "Not enough image data");
}
@@ -3413,16 +3889,16 @@ png_read_start_row(png_structp png_ptr) /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */
/* Start of interlace block */
- PNG_CONST int png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0};
+ static PNG_CONST png_byte png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0};
/* Offset to next interlace block */
- PNG_CONST int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
+ static PNG_CONST png_byte png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
/* Start of interlace block in the y direction */
- PNG_CONST int png_pass_ystart[7] = {0, 0, 4, 0, 2, 0, 1};
+ static PNG_CONST png_byte png_pass_ystart[7] = {0, 0, 4, 0, 2, 0, 1};
/* Offset to next interlace block in the y direction */
- PNG_CONST int png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2};
+ static PNG_CONST png_byte png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2};
#endif
int max_pixel_depth;
@@ -3458,6 +3934,16 @@ png_read_start_row(png_structp png_ptr) max_pixel_depth = png_ptr->pixel_depth;
+ /* WARNING: * png_read_transform_info (pngrtran.c) performs a simpliar set of
+ * calculations to calculate the final pixel depth, then
+ * png_do_read_transforms actually does the transforms. This means that the
+ * code which effectively calculates this value is actually repeated in three
+ * separate places. They must all match. Innocent changes to the order of
+ * transformations can and will break libpng in a way that causes memory
+ * overwrites.
+ *
+ * TODO: fix this.
+ */
#ifdef PNG_READ_PACK_SUPPORTED
if ((png_ptr->transformations & PNG_PACK) && png_ptr->bit_depth < 8)
max_pixel_depth = 8;
@@ -3516,10 +4002,7 @@ png_read_start_row(png_structp png_ptr) #ifdef PNG_READ_FILLER_SUPPORTED
if (png_ptr->transformations & (PNG_FILLER))
{
- if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
- max_pixel_depth = 32;
-
- else if (png_ptr->color_type == PNG_COLOR_TYPE_GRAY)
+ if (png_ptr->color_type == PNG_COLOR_TYPE_GRAY)
{
if (max_pixel_depth <= 8)
max_pixel_depth = 16;
@@ -3528,7 +4011,8 @@ png_read_start_row(png_structp png_ptr) max_pixel_depth = 32;
}
- else if (png_ptr->color_type == PNG_COLOR_TYPE_RGB)
+ else if (png_ptr->color_type == PNG_COLOR_TYPE_RGB ||
+ png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
{
if (max_pixel_depth <= 32)
max_pixel_depth = 32;
@@ -3582,14 +4066,20 @@ png_read_start_row(png_structp png_ptr) defined(PNG_USER_TRANSFORM_PTR_SUPPORTED)
if (png_ptr->transformations & PNG_USER_TRANSFORM)
{
- int user_pixel_depth = png_ptr->user_transform_depth*
+ int user_pixel_depth = png_ptr->user_transform_depth *
png_ptr->user_transform_channels;
if (user_pixel_depth > max_pixel_depth)
- max_pixel_depth=user_pixel_depth;
+ max_pixel_depth = user_pixel_depth;
}
#endif
+ /* This value is stored in png_struct and double checked in the row read
+ * code.
+ */
+ png_ptr->maximum_pixel_depth = (png_byte)max_pixel_depth;
+ png_ptr->transformed_pixel_depth = 0; /* calculated on demand */
+
/* Align the width on the next larger 8 pixels. Mainly used
* for interlacing
*/
@@ -3608,28 +4098,39 @@ defined(PNG_USER_TRANSFORM_PTR_SUPPORTED) if (row_bytes + 48 > png_ptr->old_big_row_buf_size)
{
png_free(png_ptr, png_ptr->big_row_buf);
+ png_free(png_ptr, png_ptr->big_prev_row);
if (png_ptr->interlaced)
png_ptr->big_row_buf = (png_bytep)png_calloc(png_ptr,
row_bytes + 48);
else
- png_ptr->big_row_buf = (png_bytep)png_malloc(png_ptr,
- row_bytes + 48);
+ png_ptr->big_row_buf = (png_bytep)png_malloc(png_ptr, row_bytes + 48);
- png_ptr->old_big_row_buf_size = row_bytes + 48;
+ png_ptr->big_prev_row = (png_bytep)png_malloc(png_ptr, row_bytes + 48);
#ifdef PNG_ALIGNED_MEMORY_SUPPORTED
/* Use 16-byte aligned memory for row_buf with at least 16 bytes
- * of padding before and after row_buf.
+ * of padding before and after row_buf; treat prev_row similarly.
+ * NOTE: the alignment is to the start of the pixels, one beyond the start
+ * of the buffer, because of the filter byte. Prior to libpng 1.5.6 this
+ * was incorrect; the filter byte was aligned, which had the exact
+ * opposite effect of that intended.
*/
- png_ptr->row_buf = png_ptr->big_row_buf + 32 -
- (((png_alloc_size_t)png_ptr->big_row_buf + 15) & 0x0F);
+ {
+ png_bytep temp = png_ptr->big_row_buf + 32;
+ int extra = (int)((temp - (png_bytep)0) & 0x0f);
+ png_ptr->row_buf = temp - extra - 1/*filter byte*/;
+
+ temp = png_ptr->big_prev_row + 32;
+ extra = (int)((temp - (png_bytep)0) & 0x0f);
+ png_ptr->prev_row = temp - extra - 1/*filter byte*/;
+ }
- png_ptr->old_big_row_buf_size = row_bytes + 48;
#else
- /* Use 32 bytes of padding before and 16 bytes after row_buf. */
- png_ptr->row_buf = png_ptr->big_row_buf + 32;
+ /* Use 31 bytes of padding before and 17 bytes after row_buf. */
+ png_ptr->row_buf = png_ptr->big_row_buf + 31;
+ png_ptr->prev_row = png_ptr->big_prev_row + 31;
#endif
png_ptr->old_big_row_buf_size = row_bytes + 48;
}
@@ -3642,15 +4143,6 @@ defined(PNG_USER_TRANSFORM_PTR_SUPPORTED) if (png_ptr->rowbytes > (PNG_SIZE_MAX - 1))
png_error(png_ptr, "Row has too many bytes to allocate in memory");
- if (png_ptr->rowbytes + 1 > png_ptr->old_prev_row_size)
- {
- png_free(png_ptr, png_ptr->prev_row);
-
- png_ptr->prev_row = (png_bytep)png_malloc(png_ptr, png_ptr->rowbytes + 1);
-
- png_ptr->old_prev_row_size = png_ptr->rowbytes + 1;
- }
-
png_memset(png_ptr->prev_row, 0, png_ptr->rowbytes + 1);
png_debug1(3, "width = %u,", png_ptr->width);
diff --git a/plugins/FreeImage/Source/LibPNG/pngset.c b/plugins/FreeImage/Source/LibPNG/pngset.c index aee628aec2..e753ca8867 100644 --- a/plugins/FreeImage/Source/LibPNG/pngset.c +++ b/plugins/FreeImage/Source/LibPNG/pngset.c @@ -1,7 +1,7 @@ /* pngset.c - storage of image information into info struct
*
- * Last changed in libpng 1.5.4 [July 7, 2011]
+ * Last changed in libpng 1.5.7 [December 15, 2011]
* Copyright (c) 1998-2011 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -64,6 +64,39 @@ png_set_cHRM_fixed(png_structp png_ptr, png_infop info_ptr, }
}
+void PNGFAPI
+png_set_cHRM_XYZ_fixed(png_structp png_ptr, png_infop info_ptr,
+ png_fixed_point int_red_X, png_fixed_point int_red_Y,
+ png_fixed_point int_red_Z, png_fixed_point int_green_X,
+ png_fixed_point int_green_Y, png_fixed_point int_green_Z,
+ png_fixed_point int_blue_X, png_fixed_point int_blue_Y,
+ png_fixed_point int_blue_Z)
+{
+ png_XYZ XYZ;
+ png_xy xy;
+
+ png_debug1(1, "in %s storage function", "cHRM XYZ fixed");
+
+ if (png_ptr == NULL || info_ptr == NULL)
+ return;
+
+ XYZ.redX = int_red_X;
+ XYZ.redY = int_red_Y;
+ XYZ.redZ = int_red_Z;
+ XYZ.greenX = int_green_X;
+ XYZ.greenY = int_green_Y;
+ XYZ.greenZ = int_green_Z;
+ XYZ.blueX = int_blue_X;
+ XYZ.blueY = int_blue_Y;
+ XYZ.blueZ = int_blue_Z;
+
+ if (png_xy_from_XYZ(&xy, XYZ))
+ png_error(png_ptr, "XYZ values out of representable range");
+
+ png_set_cHRM_fixed(png_ptr, info_ptr, xy.whitex, xy.whitey, xy.redx, xy.redy,
+ xy.greenx, xy.greeny, xy.bluex, xy.bluey);
+}
+
# ifdef PNG_FLOATING_POINT_SUPPORTED
void PNGAPI
png_set_cHRM(png_structp png_ptr, png_infop info_ptr,
@@ -80,6 +113,23 @@ png_set_cHRM(png_structp png_ptr, png_infop info_ptr, png_fixed(png_ptr, blue_x, "cHRM Blue X"),
png_fixed(png_ptr, blue_y, "cHRM Blue Y"));
}
+
+void PNGAPI
+png_set_cHRM_XYZ(png_structp png_ptr, png_infop info_ptr, double red_X,
+ double red_Y, double red_Z, double green_X, double green_Y, double green_Z,
+ double blue_X, double blue_Y, double blue_Z)
+{
+ png_set_cHRM_XYZ_fixed(png_ptr, info_ptr,
+ png_fixed(png_ptr, red_X, "cHRM Red X"),
+ png_fixed(png_ptr, red_Y, "cHRM Red Y"),
+ png_fixed(png_ptr, red_Z, "cHRM Red Z"),
+ png_fixed(png_ptr, green_X, "cHRM Red X"),
+ png_fixed(png_ptr, green_Y, "cHRM Red Y"),
+ png_fixed(png_ptr, green_Z, "cHRM Red Z"),
+ png_fixed(png_ptr, blue_X, "cHRM Red X"),
+ png_fixed(png_ptr, blue_Y, "cHRM Red Y"),
+ png_fixed(png_ptr, blue_Z, "cHRM Red Z"));
+}
# endif /* PNG_FLOATING_POINT_SUPPORTED */
#endif /* PNG_cHRM_SUPPORTED */
@@ -99,7 +149,7 @@ png_set_gAMA_fixed(png_structp png_ptr, png_infop info_ptr, png_fixed_point * possible for 1/gamma to overflow the limit of 21474 and this means the
* gamma value must be at least 5/100000 and hence at most 20000.0. For
* safety the limits here are a little narrower. The values are 0.00016 to
- * 6250.0, which are truely ridiculous gammma values (and will produce
+ * 6250.0, which are truly ridiculous gammma values (and will produce
* displays that are all black or all white.)
*/
if (file_gamma < 16 || file_gamma > 625000000)
@@ -552,10 +602,10 @@ png_set_sRGB_gAMA_and_cHRM(png_structp png_ptr, png_infop info_ptr, # ifdef PNG_cHRM_SUPPORTED
png_set_cHRM_fixed(png_ptr, info_ptr,
/* color x y */
- /* white */ 31270L, 32900L,
- /* red */ 64000L, 33000L,
- /* green */ 30000L, 60000L,
- /* blue */ 15000L, 6000L
+ /* white */ 31270, 32900,
+ /* red */ 64000, 33000,
+ /* green */ 30000, 60000,
+ /* blue */ 15000, 6000
);
# endif /* cHRM */
}
@@ -570,7 +620,7 @@ png_set_iCCP(png_structp png_ptr, png_infop info_ptr, {
png_charp new_iccp_name;
png_bytep new_iccp_profile;
- png_uint_32 length;
+ png_size_t length;
png_debug1(1, "in %s storage function", "iCCP");
@@ -631,9 +681,8 @@ png_set_text_2(png_structp png_ptr, png_infop info_ptr, {
int i;
- png_debug1(1, "in %s storage function", ((png_ptr == NULL ||
- png_ptr->chunk_name[0] == '\0') ?
- "text" : (png_const_charp)png_ptr->chunk_name));
+ png_debug1(1, "in %lx storage function", png_ptr == NULL ? "unexpected" :
+ (unsigned long)png_ptr->chunk_name);
if (png_ptr == NULL || info_ptr == NULL || num_text == 0)
return(0);
@@ -815,6 +864,15 @@ png_set_tIME(png_structp png_ptr, png_infop info_ptr, png_const_timep mod_time) (png_ptr->mode & PNG_WROTE_tIME))
return;
+ if (mod_time->month == 0 || mod_time->month > 12 ||
+ mod_time->day == 0 || mod_time->day > 31 ||
+ mod_time->hour > 23 || mod_time->minute > 59 ||
+ mod_time->second > 60)
+ {
+ png_warning(png_ptr, "Ignoring invalid time value");
+ return;
+ }
+
png_memcpy(&(info_ptr->mod_time), mod_time, png_sizeof(png_time));
info_ptr->valid |= PNG_INFO_tIME;
}
@@ -916,10 +974,10 @@ png_set_sPLT(png_structp png_ptr, {
png_sPLT_tp to = np + info_ptr->splt_palettes_num + i;
png_const_sPLT_tp from = entries + i;
- png_uint_32 length;
+ png_size_t length;
length = png_strlen(from->name) + 1;
- to->name = (png_charp)png_malloc_warn(png_ptr, (png_size_t)length);
+ to->name = (png_charp)png_malloc_warn(png_ptr, length);
if (to->name == NULL)
{
@@ -930,7 +988,7 @@ png_set_sPLT(png_structp png_ptr, png_memcpy(to->name, from->name, length);
to->entries = (png_sPLT_entryp)png_malloc_warn(png_ptr,
- (png_size_t)(from->nentries * png_sizeof(png_sPLT_entry)));
+ from->nentries * png_sizeof(png_sPLT_entry));
if (to->entries == NULL)
{
diff --git a/plugins/FreeImage/Source/LibPNG/pngstruct.h b/plugins/FreeImage/Source/LibPNG/pngstruct.h index 6d35a2f312..1824c49114 100644 --- a/plugins/FreeImage/Source/LibPNG/pngstruct.h +++ b/plugins/FreeImage/Source/LibPNG/pngstruct.h @@ -5,7 +5,7 @@ * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
- * Last changed in libpng 1.5.4 [July 7, 2011]
+ * Last changed in libpng 1.5.9 [February 18, 2012]
*
* This code is released under the libpng license.
* For conditions of distribution and use, see the disclaimer
@@ -104,13 +104,17 @@ struct png_struct_def png_size_t rowbytes; /* size of row in bytes */
png_uint_32 iwidth; /* width of current interlaced row in pixels */
png_uint_32 row_number; /* current row in interlace pass */
- png_bytep prev_row; /* buffer to save previous (unfiltered) row */
- png_bytep row_buf; /* buffer to save current (unfiltered) row */
+ png_uint_32 chunk_name; /* PNG_CHUNK() id of current chunk */
+ png_bytep prev_row; /* buffer to save previous (unfiltered) row.
+ * This is a pointer into big_prev_row
+ */
+ png_bytep row_buf; /* buffer to save current (unfiltered) row.
+ * This is a pointer into big_row_buf
+ */
png_bytep sub_row; /* buffer to save "sub" row when filtering */
png_bytep up_row; /* buffer to save "up" row when filtering */
png_bytep avg_row; /* buffer to save "avg" row when filtering */
png_bytep paeth_row; /* buffer to save "Paeth" row when filtering */
- png_row_info row_info; /* used for transformation routines */
png_size_t info_rowbytes; /* Added in 1.5.4: cache of updated row bytes */
png_uint_32 idat_size; /* current IDAT size for read */
@@ -118,7 +122,6 @@ struct png_struct_def png_colorp palette; /* palette from the input file */
png_uint_16 num_palette; /* number of color entries in palette */
png_uint_16 num_trans; /* number of transparency values */
- png_byte chunk_name[5]; /* null-terminated name of current chunk */
png_byte compression; /* file compression type (always 0) */
png_byte filter; /* file filter type (always 0) */
png_byte interlaced; /* PNG_INTERLACE_NONE, PNG_INTERLACE_ADAM7 */
@@ -126,11 +129,17 @@ struct png_struct_def png_byte do_filter; /* row filter flags (see PNG_FILTER_ below ) */
png_byte color_type; /* color type of file */
png_byte bit_depth; /* bit depth of file */
- png_byte usr_bit_depth; /* bit depth of users row */
+ png_byte usr_bit_depth; /* bit depth of users row: write only */
png_byte pixel_depth; /* number of bits per pixel */
png_byte channels; /* number of channels in file */
- png_byte usr_channels; /* channels at start of write */
+ png_byte usr_channels; /* channels at start of write: write only */
png_byte sig_bytes; /* magic bytes read/written from start of file */
+ png_byte maximum_pixel_depth;
+ /* pixel depth used for the row buffers */
+ png_byte transformed_pixel_depth;
+ /* pixel depth after read/write transforms */
+ png_byte io_chunk_string[5];
+ /* string name of chunk */
#if defined(PNG_READ_FILLER_SUPPORTED) || defined(PNG_WRITE_FILLER_SUPPORTED)
png_uint_16 filler; /* filler bytes for pixel expansion */
@@ -152,19 +161,21 @@ struct png_struct_def png_uint_32 flush_rows; /* number of rows written since last flush */
#endif
-#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED)
+#ifdef PNG_READ_GAMMA_SUPPORTED
int gamma_shift; /* number of "insignificant" bits in 16-bit gamma */
png_fixed_point gamma; /* file gamma value */
png_fixed_point screen_gamma; /* screen gamma value (display_exponent) */
-#endif
-#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED)
png_bytep gamma_table; /* gamma table for 8-bit depth files */
+ png_uint_16pp gamma_16_table; /* gamma table for 16-bit depth files */
+#if defined(PNG_READ_BACKGROUND_SUPPORTED) || \
+ defined(PNG_READ_ALPHA_MODE_SUPPORTED) || \
+ defined(PNG_READ_RGB_TO_GRAY_SUPPORTED)
png_bytep gamma_from_1; /* converts from 1.0 to screen */
png_bytep gamma_to_1; /* converts from file to 1.0 */
- png_uint_16pp gamma_16_table; /* gamma table for 16-bit depth files */
png_uint_16pp gamma_16_from_1; /* converts from 1.0 to screen */
png_uint_16pp gamma_16_to_1; /* converts from file to 1.0 */
+#endif /* READ_BACKGROUND || READ_ALPHA_MODE || RGB_TO_GRAY */
#endif
#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_sBIT_SUPPORTED)
@@ -255,19 +266,24 @@ struct png_struct_def png_bytep chunk_list;
#endif
+#ifdef PNG_READ_sRGB_SUPPORTED
+ /* Added in 1.5.5 to record an sRGB chunk in the png. */
+ png_byte is_sRGB;
+#endif
+
/* New members added in libpng-1.0.3 */
#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED
png_byte rgb_to_gray_status;
+ /* Added in libpng 1.5.5 to record setting of coefficients: */
+ png_byte rgb_to_gray_coefficients_set;
/* These were changed from png_byte in libpng-1.0.6 */
png_uint_16 rgb_to_gray_red_coeff;
png_uint_16 rgb_to_gray_green_coeff;
- png_uint_16 rgb_to_gray_blue_coeff;
+ /* deleted in 1.5.5: rgb_to_gray_blue_coeff; */
#endif
/* New member added in libpng-1.0.4 (renamed in 1.0.9) */
-#if defined(PNG_MNG_FEATURES_SUPPORTED) || \
- defined(PNG_READ_EMPTY_PLTE_SUPPORTED) || \
- defined(PNG_WRITE_EMPTY_PLTE_SUPPORTED)
+#if defined(PNG_MNG_FEATURES_SUPPORTED)
/* Changed from png_byte to png_uint_32 at version 1.2.0 */
png_uint_32 mng_features_permitted;
#endif
@@ -322,9 +338,8 @@ struct png_struct_def png_unknown_chunk unknown_chunk;
#endif
-/* New members added in libpng-1.2.26 */
+/* New member added in libpng-1.2.26 */
png_size_t old_big_row_buf_size;
- png_size_t old_prev_row_size;
/* New member added in libpng-1.2.30 */
png_charp chunkdata; /* buffer for reading chunk data */
@@ -333,5 +348,11 @@ struct png_struct_def /* New member added in libpng-1.4.0 */
png_uint_32 io_state;
#endif
+
+/* New member added in libpng-1.5.6 */
+ png_bytep big_prev_row;
+
+ void (*read_filter[PNG_FILTER_VALUE_LAST-1])(png_row_infop row_info,
+ png_bytep row, png_const_bytep prev_row);
};
#endif /* PNGSTRUCT_H */
diff --git a/plugins/FreeImage/Source/LibPNG/pngtest.c b/plugins/FreeImage/Source/LibPNG/pngtest.c index cac03ae3d2..840517400b 100644 --- a/plugins/FreeImage/Source/LibPNG/pngtest.c +++ b/plugins/FreeImage/Source/LibPNG/pngtest.c @@ -1,7 +1,7 @@ /* pngtest.c - a simple test program to test libpng
*
- * Last changed in libpng 1.5.4 [July 7, 2011]
+ * Last changed in libpng 1.5.6 [November 3, 2011]
* Copyright (c) 1998-2011 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -98,6 +98,7 @@ static char tIME_string[PNG_tIME_STRING_LENGTH] = "tIME chunk is not present"; #endif
static int verbose = 0;
+static int strict = 0;
int test_one_file PNGARG((PNG_CONST char *inname, PNG_CONST char *outname));
@@ -1162,6 +1163,10 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname) if (png_get_text(read_ptr, read_info_ptr, &text_ptr, &num_text) > 0)
{
pngtest_debug1("Handling %d iTXt/tEXt/zTXt chunks", num_text);
+
+ if (verbose)
+ printf("\n Text compression=%d\n", text_ptr->compression);
+
png_set_text(write_ptr, write_info_ptr, text_ptr, num_text);
}
}
@@ -1479,7 +1484,12 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname) FCLOSE(fpin);
FCLOSE(fpout);
- return (0);
+
+ if (strict != 0)
+ return (1);
+
+ else
+ return (0);
}
if (!num_in)
@@ -1504,7 +1514,12 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname) FCLOSE(fpin);
FCLOSE(fpout);
- return (0);
+
+ if (strict != 0)
+ return (1);
+
+ else
+ return (0);
}
}
@@ -1586,6 +1601,14 @@ main(int argc, char *argv[]) inname = argv[2];
}
+ else if (strcmp(argv[1], "--strict") == 0)
+ {
+ status_dots_requested = 0;
+ verbose = 1;
+ inname = argv[2];
+ strict++;
+ }
+
else
{
inname = argv[1];
@@ -1794,4 +1817,4 @@ main(int argc, char *argv[]) }
/* Generate a compiler error if there is an old png.h in the search path. */
-typedef png_libpng_version_1_5_4 Your_png_h_is_not_version_1_5_4;
+typedef png_libpng_version_1_5_9 Your_png_h_is_not_version_1_5_9;
diff --git a/plugins/FreeImage/Source/LibPNG/pngwrite.c b/plugins/FreeImage/Source/LibPNG/pngwrite.c index 826cddb92e..dc12a20481 100644 --- a/plugins/FreeImage/Source/LibPNG/pngwrite.c +++ b/plugins/FreeImage/Source/LibPNG/pngwrite.c @@ -1,7 +1,7 @@ /* pngwrite.c - general routines to write a PNG file
*
- * Last changed in libpng 1.5.4 [July 7, 2011]
+ * Last changed in libpng 1.5.7 [December 15, 2011]
* Copyright (c) 1998-2011 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -490,8 +490,9 @@ png_create_write_struct_2,(png_const_charp user_png_ver, png_voidp error_ptr, #ifdef PNG_SETJMP_SUPPORTED
/* Applications that neglect to set up their own setjmp() and then
- encounter a png_error() will longjmp here. Since the jmpbuf is
- then meaningless we abort instead of returning. */
+ * encounter a png_error() will longjmp here. Since the jmpbuf is
+ * then meaningless we abort instead of returning.
+ */
#ifdef USE_FAR_KEYWORD
if (setjmp(tmp_jmpbuf))
#else
@@ -608,6 +609,9 @@ png_write_image(png_structp png_ptr, png_bytepp image) void PNGAPI
png_write_row(png_structp png_ptr, png_const_bytep row)
{
+ /* 1.5.6: moved from png_struct to be a local structure: */
+ png_row_info row_info;
+
if (png_ptr == NULL)
return;
@@ -731,36 +735,31 @@ png_write_row(png_structp png_ptr, png_const_bytep row) #endif
/* Set up row info for transformations */
- png_ptr->row_info.color_type = png_ptr->color_type;
- png_ptr->row_info.width = png_ptr->usr_width;
- png_ptr->row_info.channels = png_ptr->usr_channels;
- png_ptr->row_info.bit_depth = png_ptr->usr_bit_depth;
- png_ptr->row_info.pixel_depth = (png_byte)(png_ptr->row_info.bit_depth *
- png_ptr->row_info.channels);
-
- png_ptr->row_info.rowbytes = PNG_ROWBYTES(png_ptr->row_info.pixel_depth,
- png_ptr->row_info.width);
-
- png_debug1(3, "row_info->color_type = %d", png_ptr->row_info.color_type);
- png_debug1(3, "row_info->width = %u", png_ptr->row_info.width);
- png_debug1(3, "row_info->channels = %d", png_ptr->row_info.channels);
- png_debug1(3, "row_info->bit_depth = %d", png_ptr->row_info.bit_depth);
- png_debug1(3, "row_info->pixel_depth = %d", png_ptr->row_info.pixel_depth);
- png_debug1(3, "row_info->rowbytes = %lu",
- (unsigned long)png_ptr->row_info.rowbytes);
+ row_info.color_type = png_ptr->color_type;
+ row_info.width = png_ptr->usr_width;
+ row_info.channels = png_ptr->usr_channels;
+ row_info.bit_depth = png_ptr->usr_bit_depth;
+ row_info.pixel_depth = (png_byte)(row_info.bit_depth * row_info.channels);
+ row_info.rowbytes = PNG_ROWBYTES(row_info.pixel_depth, row_info.width);
+
+ png_debug1(3, "row_info->color_type = %d", row_info.color_type);
+ png_debug1(3, "row_info->width = %u", row_info.width);
+ png_debug1(3, "row_info->channels = %d", row_info.channels);
+ png_debug1(3, "row_info->bit_depth = %d", row_info.bit_depth);
+ png_debug1(3, "row_info->pixel_depth = %d", row_info.pixel_depth);
+ png_debug1(3, "row_info->rowbytes = %lu", (unsigned long)row_info.rowbytes);
/* Copy user's row into buffer, leaving room for filter byte. */
- png_memcpy(png_ptr->row_buf + 1, row, png_ptr->row_info.rowbytes);
+ png_memcpy(png_ptr->row_buf + 1, row, row_info.rowbytes);
#ifdef PNG_WRITE_INTERLACING_SUPPORTED
/* Handle interlacing */
if (png_ptr->interlaced && png_ptr->pass < 6 &&
(png_ptr->transformations & PNG_INTERLACE))
{
- png_do_write_interlace(&(png_ptr->row_info),
- png_ptr->row_buf + 1, png_ptr->pass);
+ png_do_write_interlace(&row_info, png_ptr->row_buf + 1, png_ptr->pass);
/* This should always get caught above, but still ... */
- if (!(png_ptr->row_info.width))
+ if (!(row_info.width))
{
png_write_finish_row(png_ptr);
return;
@@ -771,9 +770,16 @@ png_write_row(png_structp png_ptr, png_const_bytep row) #ifdef PNG_WRITE_TRANSFORMS_SUPPORTED
/* Handle other transformations */
if (png_ptr->transformations)
- png_do_write_transformations(png_ptr);
+ png_do_write_transformations(png_ptr, &row_info);
#endif
+ /* At this point the row_info pixel depth must match the 'transformed' depth,
+ * which is also the output depth.
+ */
+ if (row_info.pixel_depth != png_ptr->pixel_depth ||
+ row_info.pixel_depth != png_ptr->transformed_pixel_depth)
+ png_error(png_ptr, "internal write transform logic error");
+
#ifdef PNG_MNG_FEATURES_SUPPORTED
/* Write filter_method 64 (intrapixel differencing) only if
* 1. Libpng was compiled with PNG_MNG_FEATURES_SUPPORTED and
@@ -788,12 +794,12 @@ png_write_row(png_structp png_ptr, png_const_bytep row) (png_ptr->filter_type == PNG_INTRAPIXEL_DIFFERENCING))
{
/* Intrapixel differencing */
- png_do_write_intrapixel(&(png_ptr->row_info), png_ptr->row_buf + 1);
+ png_do_write_intrapixel(&row_info, png_ptr->row_buf + 1);
}
#endif
/* Find a filter if necessary, filter the row and write it out. */
- png_write_find_filter(png_ptr, &(png_ptr->row_info));
+ png_write_find_filter(png_ptr, &row_info);
if (png_ptr->write_row_fn != NULL)
(*(png_ptr->write_row_fn))(png_ptr, png_ptr->row_number, png_ptr->pass);
@@ -879,13 +885,7 @@ png_destroy_write_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr) png_debug(1, "in png_destroy_write_struct");
if (png_ptr_ptr != NULL)
- {
png_ptr = *png_ptr_ptr;
-#ifdef PNG_USER_MEM_SUPPORTED
- free_fn = png_ptr->free_fn;
- mem_ptr = png_ptr->mem_ptr;
-#endif
- }
#ifdef PNG_USER_MEM_SUPPORTED
if (png_ptr != NULL)
diff --git a/plugins/FreeImage/Source/LibPNG/pngwtran.c b/plugins/FreeImage/Source/LibPNG/pngwtran.c index a99cb8ec19..b598149a96 100644 --- a/plugins/FreeImage/Source/LibPNG/pngwtran.c +++ b/plugins/FreeImage/Source/LibPNG/pngwtran.c @@ -1,7 +1,7 @@ /* pngwtran.c - transforms the data in a row for PNG writers
*
- * Last changed in libpng 1.5.4 [July 7, 2011]
+ * Last changed in libpng 1.5.6 [November 3, 2011]
* Copyright (c) 1998-2011 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -20,7 +20,7 @@ * transformations is significant.
*/
void /* PRIVATE */
-png_do_write_transformations(png_structp png_ptr)
+png_do_write_transformations(png_structp png_ptr, png_row_infop row_info)
{
png_debug(1, "in png_do_write_transformations");
@@ -32,8 +32,8 @@ png_do_write_transformations(png_structp png_ptr) if (png_ptr->write_user_transform_fn != NULL)
(*(png_ptr->write_user_transform_fn)) /* User write transform
function */
- (png_ptr, /* png_ptr */
- &(png_ptr->row_info), /* row_info: */
+ (png_ptr, /* png_ptr */
+ row_info, /* row_info: */
/* png_uint_32 width; width of row */
/* png_size_t rowbytes; number of bytes in row */
/* png_byte color_type; color type of pixels */
@@ -45,50 +45,50 @@ png_do_write_transformations(png_structp png_ptr) #ifdef PNG_WRITE_FILLER_SUPPORTED
if (png_ptr->transformations & PNG_FILLER)
- png_do_strip_channel(&(png_ptr->row_info), png_ptr->row_buf + 1,
+ png_do_strip_channel(row_info, png_ptr->row_buf + 1,
!(png_ptr->flags & PNG_FLAG_FILLER_AFTER));
#endif
#ifdef PNG_WRITE_PACKSWAP_SUPPORTED
if (png_ptr->transformations & PNG_PACKSWAP)
- png_do_packswap(&(png_ptr->row_info), png_ptr->row_buf + 1);
+ png_do_packswap(row_info, png_ptr->row_buf + 1);
#endif
#ifdef PNG_WRITE_PACK_SUPPORTED
if (png_ptr->transformations & PNG_PACK)
- png_do_pack(&(png_ptr->row_info), png_ptr->row_buf + 1,
+ png_do_pack(row_info, png_ptr->row_buf + 1,
(png_uint_32)png_ptr->bit_depth);
#endif
#ifdef PNG_WRITE_SWAP_SUPPORTED
if (png_ptr->transformations & PNG_SWAP_BYTES)
- png_do_swap(&(png_ptr->row_info), png_ptr->row_buf + 1);
+ png_do_swap(row_info, png_ptr->row_buf + 1);
#endif
#ifdef PNG_WRITE_SHIFT_SUPPORTED
if (png_ptr->transformations & PNG_SHIFT)
- png_do_shift(&(png_ptr->row_info), png_ptr->row_buf + 1,
+ png_do_shift(row_info, png_ptr->row_buf + 1,
&(png_ptr->shift));
#endif
#ifdef PNG_WRITE_SWAP_ALPHA_SUPPORTED
if (png_ptr->transformations & PNG_SWAP_ALPHA)
- png_do_write_swap_alpha(&(png_ptr->row_info), png_ptr->row_buf + 1);
+ png_do_write_swap_alpha(row_info, png_ptr->row_buf + 1);
#endif
#ifdef PNG_WRITE_INVERT_ALPHA_SUPPORTED
if (png_ptr->transformations & PNG_INVERT_ALPHA)
- png_do_write_invert_alpha(&(png_ptr->row_info), png_ptr->row_buf + 1);
+ png_do_write_invert_alpha(row_info, png_ptr->row_buf + 1);
#endif
#ifdef PNG_WRITE_BGR_SUPPORTED
if (png_ptr->transformations & PNG_BGR)
- png_do_bgr(&(png_ptr->row_info), png_ptr->row_buf + 1);
+ png_do_bgr(row_info, png_ptr->row_buf + 1);
#endif
#ifdef PNG_WRITE_INVERT_SUPPORTED
if (png_ptr->transformations & PNG_INVERT_MONO)
- png_do_invert(&(png_ptr->row_info), png_ptr->row_buf + 1);
+ png_do_invert(row_info, png_ptr->row_buf + 1);
#endif
}
diff --git a/plugins/FreeImage/Source/LibPNG/pngwutil.c b/plugins/FreeImage/Source/LibPNG/pngwutil.c index 85f656cced..64888f7c6c 100644 --- a/plugins/FreeImage/Source/LibPNG/pngwutil.c +++ b/plugins/FreeImage/Source/LibPNG/pngwutil.c @@ -1,7 +1,7 @@ /* pngwutil.c - utilities to write a PNG file
*
- * Last changed in libpng 1.5.4 [July 7, 2011]
+ * Last changed in libpng 1.5.6 [November 3, 2011]
* Copyright (c) 1998-2011 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -82,39 +82,20 @@ png_write_sig(png_structp png_ptr) png_ptr->mode |= PNG_HAVE_PNG_SIGNATURE;
}
-/* Write a PNG chunk all at once. The type is an array of ASCII characters
- * representing the chunk name. The array must be at least 4 bytes in
- * length, and does not need to be null terminated. To be safe, pass the
- * pre-defined chunk names here, and if you need a new one, define it
- * where the others are defined. The length is the length of the data.
- * All the data must be present. If that is not possible, use the
- * png_write_chunk_start(), png_write_chunk_data(), and png_write_chunk_end()
- * functions instead.
- */
-void PNGAPI
-png_write_chunk(png_structp png_ptr, png_const_bytep chunk_name,
- png_const_bytep data, png_size_t length)
-{
- if (png_ptr == NULL)
- return;
-
- png_write_chunk_start(png_ptr, chunk_name, (png_uint_32)length);
- png_write_chunk_data(png_ptr, data, (png_size_t)length);
- png_write_chunk_end(png_ptr);
-}
-
/* Write the start of a PNG chunk. The type is the chunk type.
* The total_length is the sum of the lengths of all the data you will be
* passing in png_write_chunk_data().
*/
-void PNGAPI
-png_write_chunk_start(png_structp png_ptr, png_const_bytep chunk_name,
+static void
+png_write_chunk_header(png_structp png_ptr, png_uint_32 chunk_name,
png_uint_32 length)
{
png_byte buf[8];
- png_debug2(0, "Writing %s chunk, length = %lu", chunk_name,
- (unsigned long)length);
+#if defined(PNG_DEBUG) && (PNG_DEBUG > 0)
+ PNG_CSTRING_FROM_CHUNK(buf, chunk_name);
+ png_debug2(0, "Writing %s chunk, length = %lu", buf, (unsigned long)length);
+#endif
if (png_ptr == NULL)
return;
@@ -128,16 +109,16 @@ png_write_chunk_start(png_structp png_ptr, png_const_bytep chunk_name, /* Write the length and the chunk name */
png_save_uint_32(buf, length);
- png_memcpy(buf + 4, chunk_name, 4);
- png_write_data(png_ptr, buf, (png_size_t)8);
+ png_save_uint_32(buf + 4, chunk_name);
+ png_write_data(png_ptr, buf, 8);
/* Put the chunk name into png_ptr->chunk_name */
- png_memcpy(png_ptr->chunk_name, chunk_name, 4);
+ png_ptr->chunk_name = chunk_name;
/* Reset the crc and run it over the chunk name */
png_reset_crc(png_ptr);
- png_calculate_crc(png_ptr, chunk_name, 4);
+ png_calculate_crc(png_ptr, buf + 4, 4);
#ifdef PNG_IO_STATE_SUPPORTED
/* Inform the I/O callback that chunk data will (possibly) be written.
@@ -147,10 +128,17 @@ png_write_chunk_start(png_structp png_ptr, png_const_bytep chunk_name, #endif
}
-/* Write the data of a PNG chunk started with png_write_chunk_start().
+void PNGAPI
+png_write_chunk_start(png_structp png_ptr, png_const_bytep chunk_string,
+ png_uint_32 length)
+{
+ png_write_chunk_header(png_ptr, PNG_CHUNK_FROM_STRING(chunk_string), length);
+}
+
+/* Write the data of a PNG chunk started with png_write_chunk_header().
* Note that multiple calls to this function are allowed, and that the
* sum of the lengths from these calls *must* add up to the total_length
- * given to png_write_chunk_start().
+ * given to png_write_chunk_header().
*/
void PNGAPI
png_write_chunk_data(png_structp png_ptr, png_const_bytep data,
@@ -171,7 +159,7 @@ png_write_chunk_data(png_structp png_ptr, png_const_bytep data, }
}
-/* Finish a chunk started with png_write_chunk_start(). */
+/* Finish a chunk started with png_write_chunk_header(). */
void PNGAPI
png_write_chunk_end(png_structp png_ptr)
{
@@ -192,6 +180,40 @@ png_write_chunk_end(png_structp png_ptr) png_write_data(png_ptr, buf, (png_size_t)4);
}
+/* Write a PNG chunk all at once. The type is an array of ASCII characters
+ * representing the chunk name. The array must be at least 4 bytes in
+ * length, and does not need to be null terminated. To be safe, pass the
+ * pre-defined chunk names here, and if you need a new one, define it
+ * where the others are defined. The length is the length of the data.
+ * All the data must be present. If that is not possible, use the
+ * png_write_chunk_start(), png_write_chunk_data(), and png_write_chunk_end()
+ * functions instead.
+ */
+static void
+png_write_complete_chunk(png_structp png_ptr, png_uint_32 chunk_name,
+ png_const_bytep data, png_size_t length)
+{
+ if (png_ptr == NULL)
+ return;
+
+ /* On 64 bit architectures 'length' may not fit in a png_uint_32. */
+ if (length > PNG_UINT_32_MAX)
+ png_error(png_ptr, "length exceeds PNG maxima");
+
+ png_write_chunk_header(png_ptr, chunk_name, (png_uint_32)length);
+ png_write_chunk_data(png_ptr, data, length);
+ png_write_chunk_end(png_ptr);
+}
+
+/* This is the API that calls the internal function above. */
+void PNGAPI
+png_write_chunk(png_structp png_ptr, png_const_bytep chunk_string,
+ png_const_bytep data, png_size_t length)
+{
+ png_write_complete_chunk(png_ptr, PNG_CHUNK_FROM_STRING(chunk_string), data,
+ length);
+}
+
/* Initialize the compressor for the appropriate type of compression. */
static void
png_zlib_claim(png_structp png_ptr, png_uint_32 state)
@@ -560,7 +582,10 @@ png_write_compressed_data_out(png_structp png_ptr, compression_state *comp) }
#ifdef PNG_WRITE_OPTIMIZE_CMF_SUPPORTED
- if (comp->input_len >= 2 && comp->input_len < 16384)
+ /* The zbuf_size test is because the code below doesn't work if zbuf_size is
+ * '1'; simply skip it to avoid memory overwrite.
+ */
+ if (comp->input_len >= 2 && comp->input_len < 16384 && png_ptr->zbuf_size > 1)
{
unsigned int z_cmf; /* zlib compression method and flags */
@@ -652,8 +677,6 @@ png_write_IHDR(png_structp png_ptr, png_uint_32 width, png_uint_32 height, int bit_depth, int color_type, int compression_type, int filter_type,
int interlace_type)
{
- PNG_IHDR;
-
png_byte buf[13]; /* Buffer to store the IHDR info */
png_debug(1, "in png_write_IHDR");
@@ -795,7 +818,7 @@ png_write_IHDR(png_structp png_ptr, png_uint_32 width, png_uint_32 height, buf[12] = (png_byte)interlace_type;
/* Write the chunk */
- png_write_chunk(png_ptr, png_IHDR, buf, (png_size_t)13);
+ png_write_complete_chunk(png_ptr, png_IHDR, buf, (png_size_t)13);
/* Initialize zlib with PNG info */
png_ptr->zstream.zalloc = png_zalloc;
@@ -872,7 +895,6 @@ void /* PRIVATE */ png_write_PLTE(png_structp png_ptr, png_const_colorp palette,
png_uint_32 num_pal)
{
- PNG_PLTE;
png_uint_32 i;
png_const_colorp pal_ptr;
png_byte buf[3];
@@ -908,7 +930,7 @@ png_write_PLTE(png_structp png_ptr, png_const_colorp palette, png_ptr->num_palette = (png_uint_16)num_pal;
png_debug1(3, "num_palette = %d", png_ptr->num_palette);
- png_write_chunk_start(png_ptr, png_PLTE, (png_uint_32)(num_pal * 3));
+ png_write_chunk_header(png_ptr, png_PLTE, (png_uint_32)(num_pal * 3));
#ifdef PNG_POINTER_INDEXING_SUPPORTED
for (i = 0, pal_ptr = palette; i < num_pal; i++, pal_ptr++)
@@ -942,8 +964,6 @@ png_write_PLTE(png_structp png_ptr, png_const_colorp palette, void /* PRIVATE */
png_write_IDAT(png_structp png_ptr, png_bytep data, png_size_t length)
{
- PNG_IDAT;
-
png_debug(1, "in png_write_IDAT");
#ifdef PNG_WRITE_OPTIMIZE_CMF_SUPPORTED
@@ -1014,7 +1034,7 @@ png_write_IDAT(png_structp png_ptr, png_bytep data, png_size_t length) }
#endif /* PNG_WRITE_OPTIMIZE_CMF_SUPPORTED */
- png_write_chunk(png_ptr, png_IDAT, data, length);
+ png_write_complete_chunk(png_ptr, png_IDAT, data, length);
png_ptr->mode |= PNG_HAVE_IDAT;
/* Prior to 1.5.4 this code was replicated in every caller (except at the
@@ -1029,11 +1049,9 @@ png_write_IDAT(png_structp png_ptr, png_bytep data, png_size_t length) void /* PRIVATE */
png_write_IEND(png_structp png_ptr)
{
- PNG_IEND;
-
png_debug(1, "in png_write_IEND");
- png_write_chunk(png_ptr, png_IEND, NULL, (png_size_t)0);
+ png_write_complete_chunk(png_ptr, png_IEND, NULL, (png_size_t)0);
png_ptr->mode |= PNG_HAVE_IEND;
}
@@ -1042,14 +1060,13 @@ png_write_IEND(png_structp png_ptr) void /* PRIVATE */
png_write_gAMA_fixed(png_structp png_ptr, png_fixed_point file_gamma)
{
- PNG_gAMA;
png_byte buf[4];
png_debug(1, "in png_write_gAMA");
/* file_gamma is saved in 1/100,000ths */
png_save_uint_32(buf, (png_uint_32)file_gamma);
- png_write_chunk(png_ptr, png_gAMA, buf, (png_size_t)4);
+ png_write_complete_chunk(png_ptr, png_gAMA, buf, (png_size_t)4);
}
#endif
@@ -1058,7 +1075,6 @@ png_write_gAMA_fixed(png_structp png_ptr, png_fixed_point file_gamma) void /* PRIVATE */
png_write_sRGB(png_structp png_ptr, int srgb_intent)
{
- PNG_sRGB;
png_byte buf[1];
png_debug(1, "in png_write_sRGB");
@@ -1068,7 +1084,7 @@ png_write_sRGB(png_structp png_ptr, int srgb_intent) "Invalid sRGB rendering intent specified");
buf[0]=(png_byte)srgb_intent;
- png_write_chunk(png_ptr, png_sRGB, buf, (png_size_t)1);
+ png_write_complete_chunk(png_ptr, png_sRGB, buf, (png_size_t)1);
}
#endif
@@ -1078,7 +1094,6 @@ void /* PRIVATE */ png_write_iCCP(png_structp png_ptr, png_const_charp name, int compression_type,
png_const_charp profile, int profile_len)
{
- PNG_iCCP;
png_size_t name_len;
png_charp new_name;
compression_state comp;
@@ -1139,7 +1154,7 @@ png_write_iCCP(png_structp png_ptr, png_const_charp name, int compression_type, (png_size_t)profile_len, PNG_COMPRESSION_TYPE_BASE, &comp);
/* Make sure we include the NULL after the name and the compression type */
- png_write_chunk_start(png_ptr, png_iCCP,
+ png_write_chunk_header(png_ptr, png_iCCP,
(png_uint_32)(name_len + profile_len + 2));
new_name[name_len + 1] = 0x00;
@@ -1163,7 +1178,6 @@ png_write_iCCP(png_structp png_ptr, png_const_charp name, int compression_type, void /* PRIVATE */
png_write_sPLT(png_structp png_ptr, png_const_sPLT_tp spalette)
{
- PNG_sPLT;
png_size_t name_len;
png_charp new_name;
png_byte entrybuf[10];
@@ -1180,7 +1194,7 @@ png_write_sPLT(png_structp png_ptr, png_const_sPLT_tp spalette) return;
/* Make sure we include the NULL after the name */
- png_write_chunk_start(png_ptr, png_sPLT,
+ png_write_chunk_header(png_ptr, png_sPLT,
(png_uint_32)(name_len + 2 + palette_size));
png_write_chunk_data(png_ptr, (png_bytep)new_name,
@@ -1248,7 +1262,6 @@ png_write_sPLT(png_structp png_ptr, png_const_sPLT_tp spalette) void /* PRIVATE */
png_write_sBIT(png_structp png_ptr, png_const_color_8p sbit, int color_type)
{
- PNG_sBIT;
png_byte buf[4];
png_size_t size;
@@ -1299,7 +1312,7 @@ png_write_sBIT(png_structp png_ptr, png_const_color_8p sbit, int color_type) buf[size++] = sbit->alpha;
}
- png_write_chunk(png_ptr, png_sBIT, buf, size);
+ png_write_complete_chunk(png_ptr, png_sBIT, buf, size);
}
#endif
@@ -1311,7 +1324,6 @@ png_write_cHRM_fixed(png_structp png_ptr, png_fixed_point white_x, png_fixed_point green_x, png_fixed_point green_y, png_fixed_point blue_x,
png_fixed_point blue_y)
{
- PNG_cHRM;
png_byte buf[32];
png_debug(1, "in png_write_cHRM");
@@ -1334,7 +1346,7 @@ png_write_cHRM_fixed(png_structp png_ptr, png_fixed_point white_x, png_save_uint_32(buf + 24, (png_uint_32)blue_x);
png_save_uint_32(buf + 28, (png_uint_32)blue_y);
- png_write_chunk(png_ptr, png_cHRM, buf, (png_size_t)32);
+ png_write_complete_chunk(png_ptr, png_cHRM, buf, (png_size_t)32);
}
}
#endif
@@ -1345,7 +1357,6 @@ void /* PRIVATE */ png_write_tRNS(png_structp png_ptr, png_const_bytep trans_alpha,
png_const_color_16p tran, int num_trans, int color_type)
{
- PNG_tRNS;
png_byte buf[6];
png_debug(1, "in png_write_tRNS");
@@ -1359,7 +1370,7 @@ png_write_tRNS(png_structp png_ptr, png_const_bytep trans_alpha, }
/* Write the chunk out as it is */
- png_write_chunk(png_ptr, png_tRNS, trans_alpha, (png_size_t)num_trans);
+ png_write_complete_chunk(png_ptr, png_tRNS, trans_alpha, (png_size_t)num_trans);
}
else if (color_type == PNG_COLOR_TYPE_GRAY)
@@ -1374,7 +1385,7 @@ png_write_tRNS(png_structp png_ptr, png_const_bytep trans_alpha, }
png_save_uint_16(buf, tran->gray);
- png_write_chunk(png_ptr, png_tRNS, buf, (png_size_t)2);
+ png_write_complete_chunk(png_ptr, png_tRNS, buf, (png_size_t)2);
}
else if (color_type == PNG_COLOR_TYPE_RGB)
@@ -1394,7 +1405,7 @@ png_write_tRNS(png_structp png_ptr, png_const_bytep trans_alpha, return;
}
- png_write_chunk(png_ptr, png_tRNS, buf, (png_size_t)6);
+ png_write_complete_chunk(png_ptr, png_tRNS, buf, (png_size_t)6);
}
else
@@ -1409,7 +1420,6 @@ png_write_tRNS(png_structp png_ptr, png_const_bytep trans_alpha, void /* PRIVATE */
png_write_bKGD(png_structp png_ptr, png_const_color_16p back, int color_type)
{
- PNG_bKGD;
png_byte buf[6];
png_debug(1, "in png_write_bKGD");
@@ -1428,7 +1438,7 @@ png_write_bKGD(png_structp png_ptr, png_const_color_16p back, int color_type) }
buf[0] = back->index;
- png_write_chunk(png_ptr, png_bKGD, buf, (png_size_t)1);
+ png_write_complete_chunk(png_ptr, png_bKGD, buf, (png_size_t)1);
}
else if (color_type & PNG_COLOR_MASK_COLOR)
@@ -1448,7 +1458,7 @@ png_write_bKGD(png_structp png_ptr, png_const_color_16p back, int color_type) return;
}
- png_write_chunk(png_ptr, png_bKGD, buf, (png_size_t)6);
+ png_write_complete_chunk(png_ptr, png_bKGD, buf, (png_size_t)6);
}
else
@@ -1462,7 +1472,7 @@ png_write_bKGD(png_structp png_ptr, png_const_color_16p back, int color_type) }
png_save_uint_16(buf, back->gray);
- png_write_chunk(png_ptr, png_bKGD, buf, (png_size_t)2);
+ png_write_complete_chunk(png_ptr, png_bKGD, buf, (png_size_t)2);
}
}
#endif
@@ -1472,7 +1482,6 @@ png_write_bKGD(png_structp png_ptr, png_const_color_16p back, int color_type) void /* PRIVATE */
png_write_hIST(png_structp png_ptr, png_const_uint_16p hist, int num_hist)
{
- PNG_hIST;
int i;
png_byte buf[3];
@@ -1487,7 +1496,7 @@ png_write_hIST(png_structp png_ptr, png_const_uint_16p hist, int num_hist) return;
}
- png_write_chunk_start(png_ptr, png_hIST, (png_uint_32)(num_hist * 2));
+ png_write_chunk_header(png_ptr, png_hIST, (png_uint_32)(num_hist * 2));
for (i = 0; i < num_hist; i++)
{
@@ -1637,7 +1646,6 @@ void /* PRIVATE */ png_write_tEXt(png_structp png_ptr, png_const_charp key, png_const_charp text,
png_size_t text_len)
{
- PNG_tEXt;
png_size_t key_len;
png_charp new_key;
@@ -1653,7 +1661,7 @@ png_write_tEXt(png_structp png_ptr, png_const_charp key, png_const_charp text, text_len = png_strlen(text);
/* Make sure we include the 0 after the key */
- png_write_chunk_start(png_ptr, png_tEXt,
+ png_write_chunk_header(png_ptr, png_tEXt,
(png_uint_32)(key_len + text_len + 1));
/*
* We leave it to the application to meet PNG-1.0 requirements on the
@@ -1679,7 +1687,6 @@ void /* PRIVATE */ png_write_zTXt(png_structp png_ptr, png_const_charp key, png_const_charp text,
png_size_t text_len, int compression)
{
- PNG_zTXt;
png_size_t key_len;
png_byte buf;
png_charp new_key;
@@ -1713,7 +1720,7 @@ png_write_zTXt(png_structp png_ptr, png_const_charp key, png_const_charp text, &comp);
/* Write start of chunk */
- png_write_chunk_start(png_ptr, png_zTXt,
+ png_write_chunk_header(png_ptr, png_zTXt,
(png_uint_32)(key_len+text_len + 2));
/* Write key */
@@ -1742,7 +1749,6 @@ void /* PRIVATE */ png_write_iTXt(png_structp png_ptr, int compression, png_const_charp key,
png_const_charp lang, png_const_charp lang_key, png_const_charp text)
{
- PNG_iTXt;
png_size_t lang_len, key_len, lang_key_len, text_len;
png_charp new_lang;
png_charp new_key = NULL;
@@ -1787,7 +1793,7 @@ png_write_iTXt(png_structp png_ptr, int compression, png_const_charp key, * and the NULs after the key, lang, and lang_key parts
*/
- png_write_chunk_start(png_ptr, png_iTXt, (png_uint_32)(
+ png_write_chunk_header(png_ptr, png_iTXt, (png_uint_32)(
5 /* comp byte, comp flag, terminators for key, lang and lang_key */
+ key_len
+ lang_len
@@ -1836,7 +1842,6 @@ void /* PRIVATE */ png_write_oFFs(png_structp png_ptr, png_int_32 x_offset, png_int_32 y_offset,
int unit_type)
{
- PNG_oFFs;
png_byte buf[9];
png_debug(1, "in png_write_oFFs");
@@ -1848,7 +1853,7 @@ png_write_oFFs(png_structp png_ptr, png_int_32 x_offset, png_int_32 y_offset, png_save_int_32(buf + 4, y_offset);
buf[8] = (png_byte)unit_type;
- png_write_chunk(png_ptr, png_oFFs, buf, (png_size_t)9);
+ png_write_complete_chunk(png_ptr, png_oFFs, buf, (png_size_t)9);
}
#endif
#ifdef PNG_WRITE_pCAL_SUPPORTED
@@ -1858,9 +1863,8 @@ png_write_pCAL(png_structp png_ptr, png_charp purpose, png_int_32 X0, png_int_32 X1, int type, int nparams, png_const_charp units,
png_charpp params)
{
- PNG_pCAL;
png_size_t purpose_len, units_len, total_len;
- png_uint_32p params_len;
+ png_size_tp params_len;
png_byte buf[10];
png_charp new_purpose;
int i;
@@ -1876,8 +1880,8 @@ png_write_pCAL(png_structp png_ptr, png_charp purpose, png_int_32 X0, png_debug1(3, "pCAL units length = %d", (int)units_len);
total_len = purpose_len + units_len + 10;
- params_len = (png_uint_32p)png_malloc(png_ptr,
- (png_alloc_size_t)(nparams * png_sizeof(png_uint_32)));
+ params_len = (png_size_tp)png_malloc(png_ptr,
+ (png_alloc_size_t)(nparams * png_sizeof(png_size_t)));
/* Find the length of each parameter, making sure we don't count the
* null terminator for the last parameter.
@@ -1887,13 +1891,12 @@ png_write_pCAL(png_structp png_ptr, png_charp purpose, png_int_32 X0, params_len[i] = png_strlen(params[i]) + (i == nparams - 1 ? 0 : 1);
png_debug2(3, "pCAL parameter %d length = %lu", i,
(unsigned long)params_len[i]);
- total_len += (png_size_t)params_len[i];
+ total_len += params_len[i];
}
png_debug1(3, "pCAL total length = %d", (int)total_len);
- png_write_chunk_start(png_ptr, png_pCAL, (png_uint_32)total_len);
- png_write_chunk_data(png_ptr, (png_const_bytep)new_purpose,
- (png_size_t)purpose_len);
+ png_write_chunk_header(png_ptr, png_pCAL, (png_uint_32)total_len);
+ png_write_chunk_data(png_ptr, (png_const_bytep)new_purpose, purpose_len);
png_save_int_32(buf, X0);
png_save_int_32(buf + 4, X1);
buf[8] = (png_byte)type;
@@ -1905,8 +1908,7 @@ png_write_pCAL(png_structp png_ptr, png_charp purpose, png_int_32 X0, for (i = 0; i < nparams; i++)
{
- png_write_chunk_data(png_ptr, (png_const_bytep)params[i],
- (png_size_t)params_len[i]);
+ png_write_chunk_data(png_ptr, (png_const_bytep)params[i], params_len[i]);
}
png_free(png_ptr, params_len);
@@ -1920,7 +1922,6 @@ void /* PRIVATE */ png_write_sCAL_s(png_structp png_ptr, int unit, png_const_charp width,
png_const_charp height)
{
- PNG_sCAL;
png_byte buf[64];
png_size_t wlen, hlen, total_len;
@@ -1941,7 +1942,7 @@ png_write_sCAL_s(png_structp png_ptr, int unit, png_const_charp width, png_memcpy(buf + wlen + 2, height, hlen); /* Do NOT append the '\0' here */
png_debug1(3, "sCAL total length = %u", (unsigned int)total_len);
- png_write_chunk(png_ptr, png_sCAL, buf, total_len);
+ png_write_complete_chunk(png_ptr, png_sCAL, buf, total_len);
}
#endif
@@ -1952,7 +1953,6 @@ png_write_pHYs(png_structp png_ptr, png_uint_32 x_pixels_per_unit, png_uint_32 y_pixels_per_unit,
int unit_type)
{
- PNG_pHYs;
png_byte buf[9];
png_debug(1, "in png_write_pHYs");
@@ -1964,7 +1964,7 @@ png_write_pHYs(png_structp png_ptr, png_uint_32 x_pixels_per_unit, png_save_uint_32(buf + 4, y_pixels_per_unit);
buf[8] = (png_byte)unit_type;
- png_write_chunk(png_ptr, png_pHYs, buf, (png_size_t)9);
+ png_write_complete_chunk(png_ptr, png_pHYs, buf, (png_size_t)9);
}
#endif
@@ -1975,7 +1975,6 @@ png_write_pHYs(png_structp png_ptr, png_uint_32 x_pixels_per_unit, void /* PRIVATE */
png_write_tIME(png_structp png_ptr, png_const_timep mod_time)
{
- PNG_tIME;
png_byte buf[7];
png_debug(1, "in png_write_tIME");
@@ -1995,7 +1994,7 @@ png_write_tIME(png_structp png_ptr, png_const_timep mod_time) buf[5] = mod_time->minute;
buf[6] = mod_time->second;
- png_write_chunk(png_ptr, png_tIME, buf, (png_size_t)7);
+ png_write_complete_chunk(png_ptr, png_tIME, buf, (png_size_t)7);
}
#endif
@@ -2007,28 +2006,32 @@ png_write_start_row(png_structp png_ptr) /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */
/* Start of interlace block */
- int png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0};
+ static PNG_CONST png_byte png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0};
/* Offset to next interlace block */
- int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
+ static PNG_CONST png_byte png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
/* Start of interlace block in the y direction */
- int png_pass_ystart[7] = {0, 0, 4, 0, 2, 0, 1};
+ static PNG_CONST png_byte png_pass_ystart[7] = {0, 0, 4, 0, 2, 0, 1};
/* Offset to next interlace block in the y direction */
- int png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2};
+ static PNG_CONST png_byte png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2};
#endif
- png_size_t buf_size;
+ png_alloc_size_t buf_size;
+ int usr_pixel_depth;
png_debug(1, "in png_write_start_row");
- buf_size = (png_size_t)(PNG_ROWBYTES(
- png_ptr->usr_channels*png_ptr->usr_bit_depth, png_ptr->width) + 1);
+ usr_pixel_depth = png_ptr->usr_channels * png_ptr->usr_bit_depth;
+ buf_size = PNG_ROWBYTES(usr_pixel_depth, png_ptr->width) + 1;
+
+ /* 1.5.6: added to allow checking in the row write code. */
+ png_ptr->transformed_pixel_depth = png_ptr->pixel_depth;
+ png_ptr->maximum_pixel_depth = (png_byte)usr_pixel_depth;
/* Set up row buffer */
- png_ptr->row_buf = (png_bytep)png_malloc(png_ptr,
- (png_alloc_size_t)buf_size);
+ png_ptr->row_buf = (png_bytep)png_malloc(png_ptr, buf_size);
png_ptr->row_buf[0] = PNG_FILTER_VALUE_NONE;
@@ -2045,8 +2048,7 @@ png_write_start_row(png_structp png_ptr) if (png_ptr->do_filter & (PNG_FILTER_AVG | PNG_FILTER_UP | PNG_FILTER_PAETH))
{
/* Set up previous row buffer */
- png_ptr->prev_row = (png_bytep)png_calloc(png_ptr,
- (png_alloc_size_t)buf_size);
+ png_ptr->prev_row = (png_bytep)png_calloc(png_ptr, buf_size);
if (png_ptr->do_filter & PNG_FILTER_UP)
{
@@ -2114,16 +2116,16 @@ png_write_finish_row(png_structp png_ptr) /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */
/* Start of interlace block */
- int png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0};
+ static PNG_CONST png_byte png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0};
/* Offset to next interlace block */
- int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
+ static PNG_CONST png_byte png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
/* Start of interlace block in the y direction */
- int png_pass_ystart[7] = {0, 0, 4, 0, 2, 0, 1};
+ static PNG_CONST png_byte png_pass_ystart[7] = {0, 0, 4, 0, 2, 0, 1};
/* Offset to next interlace block in the y direction */
- int png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2};
+ static PNG_CONST png_byte png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2};
#endif
int ret;
@@ -2241,10 +2243,10 @@ png_do_write_interlace(png_row_infop row_info, png_bytep row, int pass) /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */
/* Start of interlace block */
- int png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0};
+ static PNG_CONST png_byte png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0};
/* Offset to next interlace block */
- int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
+ static PNG_CONST png_byte png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
png_debug(1, "in png_do_write_interlace");
@@ -2412,7 +2414,8 @@ png_do_write_interlace(png_row_infop row_info, png_bytep row, int pass) * been specified by the application, and then writes the row out with the
* chosen filter.
*/
-static void png_write_filtered_row(png_structp png_ptr, png_bytep filtered_row);
+static void png_write_filtered_row(png_structp png_ptr, png_bytep filtered_row,
+ png_size_t row_bytes);
#define PNG_MAXSUM (((png_uint_32)(-1)) >> 1)
#define PNG_HISHIFT 10
@@ -2428,7 +2431,7 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info) png_byte filter_to_do = png_ptr->do_filter;
png_size_t row_bytes = row_info->rowbytes;
#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
- int num_p_filters = (int)png_ptr->num_prev_filters;
+ int num_p_filters = png_ptr->num_prev_filters;
#endif
png_debug(1, "in png_write_find_filter");
@@ -3065,9 +3068,9 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info) }
}
#endif /* PNG_WRITE_FILTER_SUPPORTED */
- /* Do the actual writing of the filtered row data from the chosen filter. */
- png_write_filtered_row(png_ptr, best_row);
+ /* Do the actual writing of the filtered row data from the chosen filter. */
+ png_write_filtered_row(png_ptr, best_row, row_info->rowbytes+1);
#ifdef PNG_WRITE_FILTER_SUPPORTED
#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
@@ -3090,10 +3093,9 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info) /* Do the actual writing of a previously filtered row. */
static void
-png_write_filtered_row(png_structp png_ptr, png_bytep filtered_row)
+png_write_filtered_row(png_structp png_ptr, png_bytep filtered_row,
+ png_size_t avail/*includes filter byte*/)
{
- png_size_t avail;
-
png_debug(1, "in png_write_filtered_row");
png_debug1(2, "filter = %d", filtered_row[0]);
@@ -3101,7 +3103,6 @@ png_write_filtered_row(png_structp png_ptr, png_bytep filtered_row) png_ptr->zstream.next_in = filtered_row;
png_ptr->zstream.avail_in = 0;
- avail = png_ptr->row_info.rowbytes + 1;
/* Repeat until we have compressed all the data */
do
{
|