AdvaImg plugin folder renaming

git-svn-id: http://svn.miranda-ng.org/main/trunk@2801 1316c22d-e87f-b044-9b9b-93d7a3e3ba9c

1 files changed, 3820 insertions, 0 deletions

diff --git a/plugins/AdvaImg/src/LibPNG/CHANGES b/plugins/AdvaImg/src/LibPNG/CHANGES
new file mode 100644
index 0000000000..fb3a90be8c
--- /dev/null
+++ b/plugins/AdvaImg/src/LibPNG/CHANGES
@@ -0,0 +1,3820 @@
+#if 0

+CHANGES - changes for libpng

+

+Version 0.2

+  added reader into png.h

+  fixed small problems in stub file

+

+Version 0.3

+  added pull reader

+  split up pngwrite.c to several files

+  added pnglib.txt

+  added example.c

+  cleaned up writer, adding a few new transformations

+  fixed some bugs in writer

+  interfaced with zlib 0.5

+  added K&R support

+  added check for 64 KB blocks for 16-bit machines

+

+Version 0.4

+  cleaned up code and commented code

+  simplified time handling into png_time

+  created png_color_16 and png_color_8 to handle color needs

+  cleaned up color type defines

+  fixed various bugs

+  made various names more consistent

+  interfaced with zlib 0.71

+  cleaned up zTXt reader and writer (using zlib's Reset functions)

+  split transformations into pngrtran.c and pngwtran.c

+

+Version 0.5

+  interfaced with zlib 0.8

+  fixed many reading and writing bugs

+  saved using 3 spaces instead of tabs

+

+Version 0.6

+  added png_large_malloc() and png_large_free()

+  added png_size_t

+  cleaned up some compiler warnings

+  added png_start_read_image()

+

+Version 0.7

+  cleaned up lots of bugs

+  finished dithering and other stuff

+  added test program

+  changed name from pnglib to libpng

+

+Version 0.71 [June, 1995]

+  changed pngtest.png for zlib 0.93

+  fixed error in libpng.txt and example.c

+

+Version 0.8

+  cleaned up some bugs

+  added png_set_filler()

+  split up pngstub.c into pngmem.c, pngio.c, and pngerror.c

+  added #define's to remove unwanted code

+  moved png_info_init() to png.c

+  added old_size into png_realloc()

+  added functions to manually set filtering and compression info

+  changed compression parameters based on image type

+  optimized filter selection code

+  added version info

+  changed external functions passing floats to doubles (k&r problems?)

+  put all the configurable stuff in pngconf.h

+  enabled png_set_shift to work with paletted images on read

+  added png_read_update_info() - updates info structure with transformations

+

+Version 0.81 [August, 1995]

+  incorporated Tim Wegner's medium model code (thanks, Tim)

+

+Version 0.82 [September, 1995]

+  [unspecified changes]

+

+Version 0.85 [December, 1995]

+  added more medium model code (almost everything's a far)

+  added i/o, error, and memory callback functions

+  fixed some bugs (16-bit, 4-bit interlaced, etc.)

+  added first run progressive reader (barely tested)

+

+Version 0.86 [January, 1996]

+  fixed bugs

+  improved documentation

+

+Version 0.87 [January, 1996]

+  fixed medium model bugs

+  fixed other bugs introduced in 0.85 and 0.86

+  added some minor documentation

+

+Version 0.88 [January, 1996]

+  fixed progressive bugs

+  replaced tabs with spaces

+  cleaned up documentation

+  added callbacks for read/write and warning/error functions

+

+Version 0.89 [July, 1996]

+  Added new initialization API to make libpng work better with shared libs

+    we now have png_create_read_struct(), png_create_write_struct(),

+    png_create_info_struct(), png_destroy_read_struct(), and

+    png_destroy_write_struct() instead of the separate calls to

+    malloc and png_read_init(), png_info_init(), and png_write_init()

+  Changed warning/error callback functions to fix bug - this means you

+    should use the new initialization API if you were using the old

+    png_set_message_fn() calls, and that the old API no longer exists

+    so that people are aware that they need to change their code

+  Changed filter selection API to allow selection of multiple filters

+    since it didn't work in previous versions of libpng anyways

+  Optimized filter selection code

+  Fixed png_set_background() to allow using an arbitrary RGB color for

+    paletted images

+  Fixed gamma and background correction for paletted images, so

+    png_correct_palette is not needed unless you are correcting an

+    external palette (you will need to #define PNG_CORRECT_PALETTE_SUPPORTED

+    in pngconf.h) - if nobody uses this, it may disappear in the future.

+  Fixed bug with Borland 64K memory allocation (Alexander Lehmann)

+  Fixed bug in interlace handling (Smarasderagd, I think)

+  Added more error checking for writing and image to reduce invalid files

+  Separated read and write functions so that they won't both be linked

+    into a binary when only reading or writing functionality is used

+  New pngtest image also has interlacing and zTXt

+  Updated documentation to reflect new API

+

+Version 0.90 [January, 1997]

+  Made CRC errors/warnings on critical and ancillary chunks configurable

+  libpng will use the zlib CRC routines by (compile-time) default

+  Changed DOS small/medium model memory support - needs zlib 1.04 (Tim Wegner)

+  Added external C++ wrapper statements to png.h (Gilles Dauphin)

+  Allow PNG file to be read when some or all of file signature has already

+    been read from the beginning of the stream.  ****This affects the size

+    of info_struct and invalidates all programs that use a shared libpng****

+  Fixed png_filler() declarations

+  Fixed? background color conversions

+  Fixed order of error function pointers to match documentation

+  Current chunk name is now available in png_struct to reduce the number

+    of nearly identical error messages (will simplify multi-lingual

+    support when available)

+  Try to get ready for unknown-chunk callback functions:

+    - previously read critical chunks are flagged, so the chunk handling

+      routines can determine if the chunk is in the right place

+    - all chunk handling routines have the same prototypes, so we will

+      be able to handle all chunks via a callback mechanism

+  Try to fix Linux "setjmp" buffer size problems

+  Removed png_large_malloc, png_large_free, and png_realloc functions.

+

+Version 0.95 [March, 1997]

+  Fixed bug in pngwutil.c allocating "up_row" twice and "avg_row" never

+  Fixed bug in PNG file signature compares when start != 0

+  Changed parameter type of png_set_filler(...filler...) from png_byte

+    to png_uint_32

+  Added test for MACOS to ensure that both math.h and fp.h are not #included

+  Added macros for libpng to be compiled as a Windows DLL (Andreas Kupries)

+  Added "packswap" transformation, which changes the endianness of

+    packed-pixel bytes (Kevin Bracey)

+  Added "strip_alpha" transformation, which removes the alpha channel of

+    input images without using it (not necessarily a good idea)

+  Added "swap_alpha" transformation, which puts the alpha channel in front

+    of the color bytes instead of after

+  Removed all implicit variable tests which assume NULL == 0 (I think)

+  Changed several variables to "png_size_t" to show 16/32-bit limitations

+  Added new pCAL chunk read/write support

+  Added experimental filter selection weighting (Greg Roelofs)

+  Removed old png_set_rgbx() and png_set_xrgb() functions that have been

+     obsolete for about 2 years now (use png_set_filler() instead)

+  Added macros to read 16- and 32-bit ints directly from buffer, to be

+    used only on those systems that support it (namely PowerPC and 680x0)

+    With some testing, this may become the default for MACOS/PPC systems.

+  Only calculate CRC on data if we are going to use it

+  Added macros for zTXt compression type PNG_zTXt_COMPRESSION_???

+  Added macros for simple libpng debugging output selectable at compile time

+  Removed PNG_READ_END_MODE in progressive reader (Smarasderagd)

+  More description of info_struct in libpng.txt and png.h

+  More instructions in example.c

+  More chunk types tested in pngtest.c

+  Renamed pngrcb.c to pngset.c, and all png_read_<chunk> functions to be

+    png_set_<chunk>.  We now have corresponding png_get_<chunk>

+    functions in pngget.c to get information in info_ptr.  This isolates

+    the application from the internal organization of png_info_struct

+    (good for shared library implementations).

+

+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() 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)

+  Added typecasts to quiet compiler errors

+  Added more debugging info

+

+Version 0.97 [January, 1998]

+  Removed PNG_USE_OWN_CRC capability

+  Relocated png_set_crc_action from pngrutil.c to pngrtran.c

+  Fixed typecasts of "new_key", etc. (Andreas Dilger)

+  Added RFC 1152 [sic] date support

+  Fixed bug in gamma handling of 4-bit grayscale

+  Added 2-bit grayscale gamma handling (Glenn R-P)

+  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;

+    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 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 0.98 [January, 1998]

+  Cleaned up some typos in libpng.txt and in code documentation

+  Fixed memory leaks in pCAL chunk processing (Glenn R-P and John Bowler)

+  Cosmetic change "display_gamma" to "screen_gamma" in pngrtran.c

+  Changed recommendation about file_gamma for PC images to .51 from .45,

+    in example.c and libpng.txt, added comments to distinguish between

+    screen_gamma, viewing_gamma, and display_gamma.

+  Changed all references to RFC1152 to read RFC1123 and changed the

+    PNG_TIME_RFC1152_SUPPORTED macro to PNG_TIME_RFC1123_SUPPORTED

+  Added png_invert_alpha capability (Glenn R-P -- suggestion by Jon Vincent)

+  Changed srgb_intent from png_byte to int to avoid compiler bugs

+

+Version 0.99 [January 30, 1998]

+  Free info_ptr->text instead of end_info_ptr->text in pngread.c (John Bowler)

+  Fixed a longstanding "packswap" bug in pngtrans.c

+  Fixed some inconsistencies in pngconf.h that prevented compiling with

+    PNG_READ_GAMMA_SUPPORTED and PNG_READ_hIST_SUPPORTED undefined

+  Fixed some typos and made other minor rearrangement of libpng.txt (Andreas)

+  Changed recommendation about file_gamma for PC images to .50 from .51 in

+    example.c and libpng.txt, and changed file_gamma for sRGB images to .45

+  Added a number of functions to access information from the png structure

+    png_get_image_height(), etc. (Glenn R-P, suggestion by Brad Pettit)

+  Added TARGET_MACOS similar to zlib-1.0.8

+  Define PNG_ALWAYS_EXTERN when __MWERKS__ && WIN32 are defined

+  Added type casting to all png_malloc() function calls

+

+Version 0.99a [January 31, 1998]

+  Added type casts and parentheses to all returns that return a value.(Tim W.)

+

+Version 0.99b [February 4, 1998]

+  Added type cast png_uint_32 on malloc function calls where needed.

+  Changed type of num_hist from png_uint_32 to int (same as num_palette).

+  Added checks for rowbytes overflow, in case png_size_t is less than 32 bits.

+  Renamed makefile.elf to makefile.lnx.

+

+Version 0.99c [February 7, 1998]

+  More type casting.  Removed erroneous overflow test in pngmem.c.

+  Added png_buffered_memcpy() and png_buffered_memset(), apply them to rowbytes.

+  Added UNIX manual pages libpng.3 (incorporating libpng.txt) and  png.5.

+

+Version 0.99d [February 11, 1998]

+  Renamed "far_to_near()" "png_far_to_near()"

+  Revised libpng.3

+  Version 99c "buffered" operations didn't work as intended.  Replaced them

+    with png_memcpy_check() and png_memset_check().

+  Added many "if (png_ptr == NULL) return" to quell compiler warnings about

+    unused png_ptr, mostly in pngget.c and pngset.c.

+  Check for overlength tRNS chunk present when indexed-color PLTE is read.

+  Cleaned up spelling errors in libpng.3/libpng.txt

+  Corrected a problem with png_get_tRNS() which returned undefined trans array

+

+Version 0.99e [February 28, 1998]

+  Corrected png_get_tRNS() again.

+  Add parentheses for easier reading of pngget.c, fixed "||" should be "&&".

+  Touched up example.c to make more of it compileable, although the entire

+    file still can't be compiled (Willem van Schaik)

+  Fixed a bug in png_do_shift() (Bryan Tsai)

+  Added a space in png.h prototype for png_write_chunk_start()

+  Replaced pngtest.png with one created with zlib 1.1.1

+  Changed pngtest to report PASS even when file size is different (Jean-loup G.)

+  Corrected some logic errors in png_do_invert_alpha() (Chris Patterson)

+

+Version 0.99f [March 5, 1998]

+  Corrected a bug in pngpread() introduced in version 99c (Kevin Bracey)

+  Moved makefiles into a "scripts" directory, and added INSTALL instruction file

+  Added makefile.os2 and pngos2.def (A. Zabolotny) and makefile.s2x (W. Sebok)

+  Added pointers to "note on libpng versions" in makefile.lnx and README

+  Added row callback feature when reading and writing nonprogressive rows

+    and added a test of this feature in pngtest.c

+  Added user transform callbacks, with test of the feature in pngtest.c

+

+Version 0.99g [March 6, 1998, morning]

+  Minor changes to pngtest.c to suppress compiler warnings.

+  Removed "beta" language from documentation.

+

+Version 0.99h [March 6, 1998, evening]

+  Minor changes to previous minor changes to pngtest.c

+  Changed PNG_READ_NOT_FULLY_SUPPORTED to PNG_READ_TRANSFORMS_NOT_SUPPORTED

+    and added PNG_PROGRESSIVE_READ_NOT_SUPPORTED macro

+  Added user transform capability

+

+Version 1.00 [March 7, 1998]

+  Changed several typedefs in pngrutil.c

+  Added makefile.wat (Pawel Mrochen), updated makefile.tc3 (Willem van Schaik)

+  Replaced "while(1)" with "for(;;)"

+  Added PNGARG() to prototypes in pngtest.c and removed some prototypes

+  Updated some of the makefiles (Tom Lane)

+  Changed some typedefs (s_start, etc.) in pngrutil.c

+  Fixed dimensions of "short_months" array in pngwrite.c

+  Replaced ansi2knr.c with the one from jpeg-v6

+

+Version 1.0.0 [March 8, 1998]

+  Changed name from 1.00 to 1.0.0 (Adam Costello)

+  Added smakefile.ppc (with SCOPTIONS.ppc) for Amiga PPC (Andreas Kleinert)

+

+Version 1.0.0a [March 9, 1998]

+  Fixed three bugs in pngrtran.c to make gamma+background handling consistent

+    (Greg Roelofs)

+  Changed format of the PNG_LIBPNG_VER integer to xyyzz instead of xyz

+    for major, minor, and bugfix releases.  This is 10001. (Adam Costello,

+    Tom Lane)

+  Make months range from 1-12 in png_convert_to_rfc1123

+

+Version 1.0.0b [March 13, 1998]

+  Quieted compiler complaints about two empty "for" loops in pngrutil.c

+  Minor changes to makefile.s2x

+  Removed #ifdef/#endif around a png_free() in pngread.c

+

+Version 1.0.1 [March 14, 1998]

+  Changed makefile.s2x to reduce security risk of using a relative pathname

+  Fixed some typos in the documentation (Greg).

+  Fixed a problem with value of "channels" returned by png_read_update_info()

+

+Version 1.0.1a [April 21, 1998]

+  Optimized Paeth calculations by replacing abs() function calls with intrinsics

+  plus other loop optimizations. Improves avg decoding speed by about 20%.

+  Commented out i386istic "align" compiler flags in makefile.lnx.

+  Reduced the default warning level in some makefiles, to make them consistent.

+  Removed references to IJG and JPEG in the ansi2knr.c copyright statement.

+  Fixed a bug in png_do_strip_filler with XXRRGGBB => RRGGBB transformation.

+  Added grayscale and 16-bit capability to png_do_read_filler().

+  Fixed a bug in pngset.c, introduced in version 0.99c, that sets rowbytes

+    too large when writing an image with bit_depth < 8 (Bob Dellaca).

+  Corrected some bugs in the experimental weighted filtering heuristics.

+  Moved a misplaced pngrutil code block that truncates tRNS if it has more

+    than num_palette entries -- test was done before num_palette was defined.

+  Fixed a png_convert_to_rfc1123() bug that converts day 31 to 0 (Steve Eddins).

+  Changed compiler flags in makefile.wat for better optimization

+    (Pawel Mrochen).

+

+Version 1.0.1b [May 2, 1998]

+  Relocated png_do_gray_to_rgb() within png_do_read_transformations() (Greg).

+  Relocated the png_composite macros from pngrtran.c to png.h (Greg).

+  Added makefile.sco (contributed by Mike Hopkirk).

+  Fixed two bugs (missing definitions of "istop") introduced in libpng-1.0.1a.

+  Fixed a bug in pngrtran.c that would set channels=5 under some circumstances.

+  More work on the Paeth-filtering, achieving imperceptible speedup

+    (A Kleinert).

+  More work on loop optimization which may help when compiled with C++

+    compilers.

+  Added warnings when people try to use transforms they've defined out.

+  Collapsed 4 "i" and "c" loops into single "i" loops in pngrtran and pngwtran.

+  Revised paragraph about png_set_expand() in libpng.txt and libpng.3 (Greg)

+

+Version 1.0.1c [May 11, 1998]

+  Fixed a bug in pngrtran.c (introduced in libpng-1.0.1a) where the masks for

+    filler bytes should have been 0xff instead of 0xf.

+  Added max_pixel_depth=32 in pngrutil.c when using FILLER with palette images.

+  Moved PNG_WRITE_WEIGHTED_FILTER_SUPPORTED and PNG_WRITE_FLUSH_SUPPORTED

+    out of the PNG_WRITE_TRANSFORMS_NOT_SUPPORTED block of pngconf.h

+  Added "PNG_NO_WRITE_TRANSFORMS" etc., as alternatives for *_NOT_SUPPORTED,

+    for consistency, in pngconf.h

+  Added individual "ifndef PNG_NO_[CAPABILITY]" in pngconf.h to make it easier

+    to remove unwanted capabilities via the compile line

+  Made some corrections to grammar (which, it's) in documentation (Greg).

+  Corrected example.c, use of row_pointers in png_write_image().

+

+Version 1.0.1d [May 24, 1998]

+  Corrected several statements that used side effects illegally in pngrutil.c

+    and pngtrans.c, that were introduced in version 1.0.1b

+  Revised png_read_rows() to avoid repeated if-testing for NULL (A Kleinert)

+  More corrections to example.c, use of row_pointers in png_write_image()

+    and png_read_rows().

+  Added pngdll.mak and pngdef.pas to scripts directory, contributed by

+    Bob Dellaca, to make a png32bd.dll with Borland C++ 4.5

+  Fixed error in example.c with png_set_text: num_text is 3, not 2 (Guido V.)

+  Changed several loops from count-down to count-up, for consistency.

+

+Version 1.0.1e [June 6, 1998]

+  Revised libpng.txt and libpng.3 description of png_set_read|write_fn(), and

+    added warnings when people try to set png_read_fn and png_write_fn in

+    the same structure.

+  Added a test such that png_do_gamma will be done when num_trans==0

+    for truecolor images that have defined a background.  This corrects an

+    error that was introduced in libpng-0.90 that can cause gamma processing

+    to be skipped.

+  Added tests in png.h to include "trans" and "trans_values" in structures

+    when PNG_READ_BACKGROUND_SUPPORTED or PNG_READ_EXPAND_SUPPORTED is defined.

+  Add png_free(png_ptr->time_buffer) in png_destroy_read_struct()

+  Moved png_convert_to_rfc_1123() from pngwrite.c to png.c

+  Added capability for user-provided malloc_fn() and free_fn() functions,

+    and revised pngtest.c to demonstrate their use, replacing the

+    PNGTEST_DEBUG_MEM feature.

+  Added makefile.w32, for Microsoft C++ 4.0 and later (Tim Wegner).

+

+Version 1.0.2 [June 14, 1998]

+  Fixed two bugs in makefile.bor .

+

+Version 1.0.2a [December 30, 1998]

+  Replaced and extended code that was removed from png_set_filler() in 1.0.1a.

+  Fixed a bug in png_do_filler() that made it fail to write filler bytes in

+    the left-most pixel of each row (Kevin Bracey).

+  Changed "static pngcharp tIME_string" to "static char tIME_string[30]"

+    in pngtest.c (Duncan Simpson).

+  Fixed a bug in pngtest.c that caused pngtest to try to write a tIME chunk

+    even when no tIME chunk was present in the source file.

+  Fixed a problem in pngrutil.c: gray_to_rgb didn't always work with 16-bit.

+  Fixed a problem in png_read_push_finish_row(), which would not skip some

+    passes that it should skip, for images that are less than 3 pixels high.

+  Interchanged the order of calls to png_do_swap() and png_do_shift()

+    in pngwtran.c (John Cromer).

+  Added #ifdef PNG_DEBUG/#endif surrounding use of PNG_DEBUG in png.h .

+  Changed "bad adaptive filter type" from error to warning in pngrutil.c .

+  Fixed a documentation error about default filtering with 8-bit indexed-color.

+  Separated the PNG_NO_STDIO macro into PNG_NO_STDIO and PNG_NO_CONSOLE_IO

+    (L. Peter Deutsch).

+  Added png_set_rgb_to_gray() and png_get_rgb_to_gray_status() functions.

+  Added png_get_copyright() and png_get_header_version() functions.

+  Revised comments on png_set_progressive_read_fn() in libpng.txt and example.c

+  Added information about debugging in libpng.txt and libpng.3 .

+  Changed "ln -sf" to "ln -s -f" in makefile.s2x, makefile.lnx, and

+    makefile.sco.

+  Removed lines after Dynamic Dependencies" in makefile.aco .

+  Revised makefile.dec to make a shared library (Jeremie Petit).

+  Removed trailing blanks from all files.

+

+Version 1.0.2a [January 6, 1999]

+  Removed misplaced #endif and #ifdef PNG_NO_EXTERN near the end of png.h

+  Added "if" tests to silence complaints about unused png_ptr in png.h and png.c

+  Changed "check_if_png" function in example.c to return true (nonzero) if PNG.

+  Changed libpng.txt to demonstrate png_sig_cmp() instead of png_check_sig()

+    which is obsolete.

+

+Version 1.0.3 [January 14, 1999]

+  Added makefile.hux, for Hewlett Packard HPUX 10.20 and 11.00 (Jim Rice)

+  Added a statement of Y2K compliance in png.h, libpng.3, and Y2KINFO.

+

+Version 1.0.3a [August 12, 1999]

+  Added check for PNG_READ_INTERLACE_SUPPORTED in pngread.c; issue a warning

+     if an attempt is made to read an interlaced image when it's not supported.

+  Added check if png_ptr->trans is defined before freeing it in pngread.c

+  Modified the Y2K statement to include versions back to version 0.71

+  Fixed a bug in the check for valid IHDR bit_depth/color_types in pngrutil.c

+  Modified makefile.wat (added -zp8 flag, ".symbolic", changed some comments)

+  Replaced leading blanks with tab characters in makefile.hux

+  Changed "dworkin.wustl.edu" to "ccrc.wustl.edu" in various documents.

+  Changed (float)red and (float)green to (double)red, (double)green

+     in png_set_rgb_to_gray() to avoid "promotion" problems in AIX.

+  Fixed a bug in pngconf.h that omitted <stdio.h> when PNG_DEBUG==0 (K Bracey).

+  Reformatted libpng.3 and libpngpf.3 with proper fonts (script by J. vanZandt).

+  Updated documentation to refer to the PNG-1.2 specification.

+  Removed ansi2knr.c and left pointers to the latest source for ansi2knr.c

+    in makefile.knr, INSTALL, and README (L. Peter Deutsch)

+  Fixed bugs in calculation of the length of rowbytes when adding alpha

+    channels to 16-bit images, in pngrtran.c (Chris Nokleberg)

+  Added function png_set_user_transform_info() to store user_transform_ptr,

+    user_depth, and user_channels into the png_struct, and a function

+    png_get_user_transform_ptr() to retrieve the pointer (Chris Nokleberg)

+  Added function png_set_empty_plte_permitted() to make libpng useable

+    in MNG applications.

+  Corrected the typedef for png_free_ptr in png.h (Jesse Jones).

+  Correct gamma with srgb is 45455 instead of 45000 in pngrutil.c, to be

+    consistent with PNG-1.2, and allow variance of 500 before complaining.

+  Added assembler code contributed by Intel in file pngvcrd.c and modified

+    makefile.w32 to use it (Nirav Chhatrapati, INTEL Corporation,

+    Gilles Vollant)

+  Changed "ln -s -f" to "ln -f -s" in the makefiles to make Solaris happy.

+  Added some aliases for png_set_expand() in pngrtran.c, namely

+    png_set_expand_PLTE(), png_set_expand_depth(), and png_set_expand_tRNS()

+    (Greg Roelofs, in "PNG: The Definitive Guide").

+  Added makefile.beo for BEOS on X86, contributed by Sander Stok.

+

+Version 1.0.3b [August 26, 1999]

+  Replaced 2147483647L several places with PNG_MAX_UINT macro, defined in png.h

+  Changed leading blanks to tabs in all makefiles.

+  Define PNG_USE_PNGVCRD in makefile.w32, to get MMX assembler code.

+  Made alternate versions of  png_set_expand() in pngrtran.c, namely

+    png_set_gray_1_2_4_to_8, png_set_palette_to_rgb, and png_set_tRNS_to_alpha

+    (Greg Roelofs, in "PNG: The Definitive Guide").  Deleted the 1.0.3a aliases.

+  Relocated start of 'extern "C"' block in png.h so it doesn't include pngconf.h

+  Revised calculation of num_blocks in pngmem.c to avoid a potentially

+    negative shift distance, whose results are undefined in the C language.

+  Added a check in pngset.c to prevent writing multiple tIME chunks.

+  Added a check in pngwrite.c to detect invalid small window_bits sizes.

+

+Version 1.0.3d [September 4, 1999]

+  Fixed type casting of igamma in pngrutil.c

+  Added new png_expand functions to scripts/pngdef.pas and pngos2.def

+  Added a demo read_user_transform_fn that examines the row filters in pngtest.c

+

+Version 1.0.4 [September 24, 1999]

+  Define PNG_ALWAYS_EXTERN in pngconf.h if __STDC__ is defined

+  Delete #define PNG_INTERNAL and include "png.h" from pngasmrd.h

+  Made several minor corrections to pngtest.c

+  Renamed the makefiles with longer but more user friendly extensions.

+  Copied the PNG copyright and license to a separate LICENSE file.

+  Revised documentation, png.h, and example.c to remove reference to

+    "viewing_gamma" which no longer appears in the PNG specification.

+  Revised pngvcrd.c to use MMX code for interlacing only on the final pass.

+  Updated pngvcrd.c to use the faster C filter algorithms from libpng-1.0.1a

+  Split makefile.win32vc into two versions, makefile.vcawin32 (uses MMX

+    assembler code) and makefile.vcwin32 (doesn't).

+  Added a CPU timing report to pngtest.c (enabled by defining PNGTEST_TIMING)

+  Added a copy of pngnow.png to the distribution.

+

+Version 1.0.4a [September 25, 1999]

+  Increase max_pixel_depth in pngrutil.c if a user transform needs it.

+  Changed several division operations to right-shifts in pngvcrd.c

+

+Version 1.0.4b [September 30, 1999]

+  Added parentheses in line 3732 of pngvcrd.c

+  Added a comment in makefile.linux warning about buggy -O3 in pgcc 2.95.1

+

+Version 1.0.4c [October 1, 1999]

+  Added a "png_check_version" function in png.c and pngtest.c that will generate

+    a helpful compiler error if an old png.h is found in the search path.

+  Changed type of png_user_transform_depth|channels from int to png_byte.

+

+Version 1.0.4d [October 6, 1999]

+  Changed 0.45 to 0.45455 in png_set_sRGB()

+  Removed unused PLTE entries from pngnow.png

+  Re-enabled some parts of pngvcrd.c (png_combine_row) that work properly.

+

+Version 1.0.4e [October 10, 1999]

+  Fixed sign error in pngvcrd.c (Greg Roelofs)

+  Replaced some instances of memcpy with simple assignments in pngvcrd (GR-P)

+

+Version 1.0.4f [October 15, 1999]

+  Surrounded example.c code with #if 0 .. #endif to prevent people from

+    inadvertently trying to compile it.

+  Changed png_get_header_version() from a function to a macro in png.h

+  Added type casting mostly in pngrtran.c and pngwtran.c

+  Removed some pointless "ptr = NULL" in pngmem.c

+  Added a "contrib" directory containing the source code from Greg's book.

+

+Version 1.0.5 [October 15, 1999]

+  Minor editing of the INSTALL and README files.

+

+Version 1.0.5a [October 23, 1999]

+  Added contrib/pngsuite and contrib/pngminus (Willem van Schaik)

+  Fixed a typo in the png_set_sRGB() function call in example.c (Jan Nijtmans)

+  Further optimization and bugfix of pngvcrd.c

+  Revised pngset.c so that it does not allocate or free memory in the user's

+    text_ptr structure.  Instead, it makes its own copy.

+  Created separate write_end_info_struct in pngtest.c for a more severe test.

+  Added code in pngwrite.c to free info_ptr->text[i].key to stop a memory leak.

+

+Version 1.0.5b [November 23, 1999]

+  Moved PNG_FLAG_HAVE_CHUNK_HEADER, PNG_FLAG_BACKGROUND_IS_GRAY and

+    PNG_FLAG_WROTE_tIME from flags to mode.

+  Added png_write_info_before_PLTE() function.

+  Fixed some typecasting in contrib/gregbook/*.c

+  Updated scripts/makevms.com and added makevms.com to contrib/gregbook

+    and contrib/pngminus (Martin Zinser)

+

+Version 1.0.5c [November 26, 1999]

+  Moved png_get_header_version from png.h to png.c, to accommodate ansi2knr.

+  Removed all global arrays (according to PNG_NO_GLOBAL_ARRAYS macro), to

+    accommodate making DLL's: Moved usr_png_ver from global variable to function

+    png_get_header_ver() in png.c.  Moved png_sig to png_sig_bytes in png.c and

+    eliminated use of png_sig in pngwutil.c.  Moved the various png_CHNK arrays

+    into pngtypes.h.  Eliminated use of global png_pass arrays.  Declared the

+    png_CHNK and png_pass arrays to be "const".  Made the global arrays

+    available to applications (although none are used in libpng itself) when

+    PNG_NO_GLOBAL_ARRAYS is not defined or when PNG_GLOBAL_ARRAYS is defined.

+  Removed some extraneous "-I" from contrib/pngminus/makefile.std

+  Changed the PNG_sRGB_INTENT macros in png.h to be consistent with PNG-1.2.

+  Change PNG_SRGB_INTENT to PNG_sRGB_INTENT in libpng.txt and libpng.3

+

+Version 1.0.5d [November 29, 1999]

+  Add type cast (png_const_charp) two places in png.c

+  Eliminated pngtypes.h; use macros instead to declare PNG_CHNK arrays.

+  Renamed "PNG_GLOBAL_ARRAYS" to "PNG_USE_GLOBAL_ARRAYS" and made available

+    to applications a macro "PNG_USE_LOCAL_ARRAYS".

+  comment out (with #ifdef) all the new declarations when

+    PNG_USE_GLOBAL_ARRAYS is defined.

+  Added PNG_EXPORT_VAR macro to accommodate making DLL's.

+

+Version 1.0.5e [November 30, 1999]

+  Added iCCP, iTXt, and sPLT support; added "lang" member to the png_text

+    structure; refactored the inflate/deflate support to make adding new chunks

+    with trailing compressed parts easier in the future, and added new functions

+    png_free_iCCP, png_free_pCAL, png_free_sPLT, png_free_text, png_get_iCCP,

+    png_get_spalettes, png_set_iCCP, png_set_spalettes (Eric S. Raymond).

+  NOTE: Applications that write text chunks MUST define png_text->lang

+    before calling png_set_text(). It must be set to NULL if you want to

+    write tEXt or zTXt chunks.  If you want your application to be able to

+    run with older versions of libpng, use

+

+      #ifdef PNG_iTXt_SUPPORTED

+         png_text[i].lang = NULL;

+      #endif

+

+  Changed png_get_oFFs() and png_set_oFFs() to use signed rather than unsigned

+    offsets (Eric S. Raymond).

+  Combined PNG_READ_cHNK_SUPPORTED and PNG_WRITE_cHNK_SUPPORTED macros into

+    PNG_cHNK_SUPPORTED and combined the three types of PNG_text_SUPPORTED

+    macros, leaving the separate macros also available.

+  Removed comments on #endifs at the end of many short, non-nested #if-blocks.

+

+Version 1.0.5f [December 6, 1999]

+  Changed makefile.solaris to issue a warning about potential problems when

+    the ucb "ld" is in the path ahead of the ccs "ld".

+  Removed "- [date]" from the "synopsis" line in libpng.3 and libpngpf.3.

+  Added sCAL chunk support (Eric S. Raymond).

+

+Version 1.0.5g [December 7, 1999]

+  Fixed "png_free_spallettes" typo in png.h

+  Added code to handle new chunks in pngpread.c

+  Moved PNG_CHNK string macro definitions outside of PNG_NO_EXTERN block

+  Added "translated_key" to png_text structure and png_write_iTXt().

+  Added code in pngwrite.c to work around a newly discovered zlib bug.

+

+Version 1.0.5h [December 10, 1999]

+  NOTE: regarding the note for version 1.0.5e, the following must also

+    be included in your code:

+        png_text[i].translated_key = NULL;

+  Unknown chunk handling is now supported.

+  Option to eliminate all floating point support was added.  Some new

+    fixed-point functions such as png_set_gAMA_fixed() were added.

+  Expanded tabs and removed trailing blanks in source files.

+

+Version 1.0.5i [December 13, 1999]

+  Added some type casts to silence compiler warnings.

+  Renamed "png_free_spalette" to "png_free_spalettes" for consistency.

+  Removed leading blanks from a #define in pngvcrd.c

+  Added some parameters to the new png_set_keep_unknown_chunks() function.

+  Added a test for up->location != 0 in the first instance of writing

+    unknown chunks in pngwrite.c

+  Changed "num" to "i" in png_free_spalettes() and png_free_unknowns() to

+    prevent recursion.

+  Added png_free_hIST() function.

+  Various patches to fix bugs in the sCAL and integer cHRM processing,

+    and to add some convenience macros for use with sCAL.

+

+Version 1.0.5j [December 21, 1999]

+  Changed "unit" parameter of png_write_sCAL from png_byte to int, to work

+    around buggy compilers.

+  Added new type "png_fixed_point" for integers that hold float*100000 values

+  Restored backward compatibility of tEXt/zTXt chunk processing:

+    Restored the first four members of png_text to the same order as v.1.0.5d.

+    Added members "lang_key" and "itxt_length" to png_text struct.  Set

+    text_length=0 when "text" contains iTXt data.  Use the "compression"

+    member to distinguish among tEXt/zTXt/iTXt types.  Added

+    PNG_ITXT_COMPRESSION_NONE (1) and PNG_ITXT_COMPRESSION_zTXt(2) macros.

+    The "Note" above, about backward incompatibility of libpng-1.0.5e, no

+    longer applies.

+  Fixed png_read|write_iTXt() to read|write parameters in the right order,

+    and to write the iTXt chunk after IDAT if it appears in the end_ptr.

+  Added pnggccrd.c, version of pngvcrd.c Intel assembler for gcc (Greg Roelofs)

+  Reversed the order of trying to write floating-point and fixed-point gAMA.

+

+Version 1.0.5k [December 27, 1999]

+  Added many parentheses, e.g., "if (a && b & c)" becomes "if (a && (b & c))"

+  Added png_handle_as_unknown() function (Glenn)

+  Added png_free_chunk_list() function and chunk_list and num_chunk_list members

+    of png_ptr.

+  Eliminated erroneous warnings about multiple sPLT chunks and sPLT-after-PLTE.

+  Fixed a libpng-1.0.5h bug in pngrutil.c that was issuing erroneous warnings

+    about ignoring incorrect gAMA with sRGB (gAMA was in fact not ignored)

+  Added png_free_tRNS(); png_set_tRNS() now malloc's its own trans array (ESR).

+  Define png_get_int_32 when oFFs chunk is supported as well as when pCAL is.

+  Changed type of proflen from png_int_32 to png_uint_32 in png_get_iCCP().

+

+Version 1.0.5l [January 1, 2000]

+  Added functions png_set_read_user_chunk_fn() and png_get_user_chunk_ptr()

+    for setting a callback function to handle unknown chunks and for

+    retrieving the associated user pointer (Glenn).

+

+Version 1.0.5m [January 7, 2000]

+  Added high-level functions png_read_png(), png_write_png(), png_free_pixels().

+

+Version 1.0.5n [January 9, 2000]

+  Added png_free_PLTE() function, and modified png_set_PLTE() to malloc its

+    own memory for info_ptr->palette.  This makes it safe for the calling

+    application to free its copy of the palette any time after it calls

+    png_set_PLTE().

+

+Version 1.0.5o [January 20, 2000]

+  Cosmetic changes only (removed some trailing blanks and TABs)

+

+Version 1.0.5p [January 31, 2000]

+  Renamed pngdll.mak to makefile.bd32

+  Cosmetic changes in pngtest.c

+

+Version 1.0.5q [February 5, 2000]

+  Relocated the makefile.solaris warning about PATH problems.

+  Fixed pngvcrd.c bug by pushing/popping registers in mmxsupport (Bruce Oberg)

+  Revised makefile.gcmmx

+  Added PNG_SETJMP_SUPPORTED, PNG_SETJMP_NOT_SUPPORTED, and PNG_ABORT() macros

+

+Version 1.0.5r [February 7, 2000]

+  Removed superfluous prototype for png_get_itxt from png.h

+  Fixed a bug in pngrtran.c that improperly expanded the background color.

+  Return *num_text=0 from png_get_text() when appropriate, and fix documentation

+    of png_get_text() in libpng.txt/libpng.3.

+

+Version 1.0.5s [February 18, 2000]

+  Added "png_jmp_env()" macro to pngconf.h, to help people migrate to the

+    new error handler that's planned for the next libpng release, and changed

+    example.c, pngtest.c, and contrib programs to use this macro.

+  Revised some of the DLL-export macros in pngconf.h (Greg Roelofs)

+  Fixed a bug in png_read_png() that caused it to fail to expand some images

+    that it should have expanded.

+  Fixed some mistakes in the unused and undocumented INCH_CONVERSIONS functions

+    in pngget.c

+  Changed the allocation of palette, history, and trans arrays back to

+    the version 1.0.5 method (linking instead of copying) which restores

+    backward compatibility with version 1.0.5.  Added some remarks about

+    that in example.c.  Added "free_me" member to info_ptr and png_ptr

+    and added png_free_data() function.

+  Updated makefile.linux and makefile.gccmmx to make directories conditionally.

+  Made cosmetic changes to pngasmrd.h

+  Added png_set_rows() and png_get_rows(), for use with png_read|write_png().

+  Modified png_read_png() to allocate info_ptr->row_pointers only if it

+    hasn't already been allocated.

+

+Version 1.0.5t [March 4, 2000]

+  Changed png_jmp_env() migration aiding macro to png_jmpbuf().

+  Fixed "interlace" typo (should be "interlaced") in contrib/gregbook/read2-x.c

+  Fixed bug with use of PNG_BEFORE_IHDR bit in png_ptr->mode, introduced when

+    PNG_FLAG_HAVE_CHUNK_HEADER was moved into png_ptr->mode in version 1.0.5b

+  Files in contrib/gregbook were revised to use png_jmpbuf() and to select

+    a 24-bit visual if one is available, and to allow abbreviated options.

+  Files in contrib/pngminus were revised to use the png_jmpbuf() macro.

+  Removed spaces in makefile.linux and makefile.gcmmx, introduced in 1.0.5s

+

+Version 1.0.5u [March 5, 2000]

+  Simplified the code that detects old png.h in png.c and pngtest.c

+  Renamed png_spalette (_p, _pp) to png_sPLT_t (_tp, _tpp)

+  Increased precision of rgb_to_gray calculations from 8 to 15 bits and

+    added png_set_rgb_to_gray_fixed() function.

+  Added makefile.bc32 (32-bit Borland C++, C mode)

+

+Version 1.0.5v [March 11, 2000]

+  Added some parentheses to the png_jmpbuf macro definition.

+  Updated references to the zlib home page, which has moved to freesoftware.com.

+  Corrected bugs in documentation regarding png_read_row() and png_write_row().

+  Updated documentation of png_rgb_to_gray calculations in libpng.3/libpng.txt.

+  Renamed makefile.borland,turboc3 back to makefile.bor,tc3 as in version 1.0.3,

+    revised borland makefiles; added makefile.ibmvac3 and makefile.gcc (Cosmin)

+

+Version 1.0.6 [March 20, 2000]

+  Minor revisions of makefile.bor, libpng.txt, and gregbook/rpng2-win.c

+  Added makefile.sggcc (SGI IRIX with gcc)

+

+Version 1.0.6d [April 7, 2000]

+  Changed sprintf() to strcpy() in png_write_sCAL_s() to work without STDIO

+  Added data_length parameter to png_decompress_chunk() function

+  Revised documentation to remove reference to abandoned png_free_chnk functions

+  Fixed an error in png_rgb_to_gray_fixed()

+  Revised example.c, usage of png_destroy_write_struct().

+  Renamed makefile.ibmvac3 to makefile.ibmc, added libpng.icc IBM project file

+  Added a check for info_ptr->free_me&PNG_FREE_TEXT when freeing text in png.c

+  Simplify png_sig_bytes() function to remove use of non-ISO-C strdup().

+

+Version 1.0.6e [April 9, 2000]

+  Added png_data_freer() function.

+  In the code that checks for over-length tRNS chunks, added check of

+    info_ptr->num_trans as well as png_ptr->num_trans (Matthias Benckmann)

+  Minor revisions of libpng.txt/libpng.3.

+  Check for existing data and free it if the free_me flag is set, in png_set_*()

+    and png_handle_*().

+  Only define PNG_WEIGHTED_FILTERS_SUPPORTED when PNG_FLOATING_POINT_SUPPORTED

+    is defined.

+  Changed several instances of PNG_NO_CONSOLE_ID to PNG_NO_STDIO in pngrutil.c

+    and mentioned the purposes of the two macros in libpng.txt/libpng.3.

+

+Version 1.0.6f [April 14, 2000]

+  Revised png_set_iCCP() and png_set_rows() to avoid prematurely freeing data.

+  Add checks in png_set_text() for NULL members of the input text structure.

+  Revised libpng.txt/libpng.3.

+  Removed superfluous prototype for png_set_iTXt from png.h

+  Removed "else" from pngread.c, after png_error(), and changed "0" to "length".

+  Changed several png_errors about malformed ancillary chunks to png_warnings.

+

+Version 1.0.6g [April 24, 2000]

+  Added png_pass-* arrays to pnggccrd.c when PNG_USE_LOCAL_ARRAYS is defined.

+  Relocated paragraph about png_set_background() in libpng.3/libpng.txt

+    and other revisions (Matthias Benckmann)

+  Relocated info_ptr->free_me, png_ptr->free_me, and other info_ptr and

+    png_ptr members to restore binary compatibility with libpng-1.0.5

+    (breaks compatibility with libpng-1.0.6).

+

+Version 1.0.6h [April 24, 2000]

+  Changed shared library so-number pattern from 2.x.y.z to xy.z (this builds

+    libpng.so.10 & libpng.so.10.6h instead of libpng.so.2 & libpng.so.2.1.0.6h)

+    This is a temporary change for test purposes.

+

+Version 1.0.6i [May 2, 2000]

+  Rearranged some members at the end of png_info and png_struct, to put

+    unknown_chunks_num and free_me within the original size of the png_structs

+    and free_me, png_read_user_fn, and png_free_fn within the original png_info,

+    because some old applications allocate the structs directly instead of

+    using png_create_*().

+  Added documentation of user memory functions in libpng.txt/libpng.3

+  Modified png_read_png so that it will use user_allocated row_pointers

+    if present, unless free_me directs that it be freed, and added description

+    of the use of png_set_rows() and png_get_rows() in libpng.txt/libpng.3.

+  Added PNG_LEGACY_SUPPORTED macro, and #ifdef out all new (since version

+    1.00) members of png_struct and png_info, to regain binary compatibility

+    when you define this macro.  Capabilities lost in this event

+    are user transforms (new in version 1.0.0),the user transform pointer

+    (new in version 1.0.2), rgb_to_gray (new in 1.0.5), iCCP, sCAL, sPLT,

+    the high-level interface, and unknown chunks support (all new in 1.0.6).

+    This was necessary because of old applications that allocate the structs

+    directly as authors were instructed to do in libpng-0.88 and earlier,

+    instead of using png_create_*().

+  Added modes PNG_CREATED_READ_STRUCT and PNG_CREATED_WRITE_STRUCT which

+    can be used to detect codes that directly allocate the structs, and

+    code to check these modes in png_read_init() and png_write_init() and

+    generate a libpng error if the modes aren't set and PNG_LEGACY_SUPPORTED

+    was not defined.

+  Added makefile.intel and updated makefile.watcom (Pawel Mrochen)

+

+Version 1.0.6j [May 3, 2000]

+  Overloaded png_read_init() and png_write_init() with macros that convert

+    calls to png_read_init_2() or png_write_init_2() that check the version

+    and structure sizes.

+

+Version 1.0.7beta11 [May 7, 2000]

+  Removed the new PNG_CREATED_READ_STRUCT and PNG_CREATED_WRITE_STRUCT modes

+    which are no longer used.

+  Eliminated the three new members of png_text when PNG_LEGACY_SUPPORTED is

+    defined or when neither PNG_READ_iTXt_SUPPORTED nor PNG_WRITE_iTXT_SUPPORTED

+    is defined.

+  Made PNG_NO_READ|WRITE_iTXt the default setting, to avoid memory

+    overrun when old applications fill the info_ptr->text structure directly.

+  Added PNGAPI macro, and added it to the definitions of all exported functions.

+  Relocated version macro definitions ahead of the includes of zlib.h and

+    pngconf.h in png.h.

+

+Version 1.0.7beta12 [May 12, 2000]

+  Revised pngset.c to avoid a problem with expanding the png_debug macro.

+  Deleted some extraneous defines from pngconf.h

+  Made PNG_NO_CONSOLE_IO the default condition when PNG_BUILD_DLL is defined.

+  Use MSC _RPTn debugging instead of fprintf if _MSC_VER is defined.

+  Added png_access_version_number() function.

+  Check for mask&PNG_FREE_CHNK (for TEXT, SCAL, PCAL) in png_free_data().

+  Expanded libpng.3/libpng.txt information about png_data_freer().

+

+Version 1.0.7beta14 [May 17, 2000] (beta13 was not published)

+  Changed pnggccrd.c and pngvcrd.c to handle bad adaptive filter types as

+    warnings instead of errors, as pngrutil.c does.

+  Set the PNG_INFO_IDAT valid flag in png_set_rows() so png_write_png()

+    will actually write IDATs.

+  Made the default PNG_USE_LOCAL_ARRAYS depend on PNG_DLL instead of WIN32.

+  Make png_free_data() ignore its final parameter except when freeing data

+    that can have multiple instances (text, sPLT, unknowns).

+  Fixed a new bug in png_set_rows().

+  Removed info_ptr->valid tests from png_free_data(), as in version 1.0.5.

+  Added png_set_invalid() function.

+  Fixed incorrect illustrations of png_destroy_write_struct() in example.c.

+

+Version 1.0.7beta15 [May 30, 2000]

+  Revised the deliberately erroneous Linux setjmp code in pngconf.h to produce

+    fewer error messages.

+  Rearranged checks for Z_OK to check the most likely path first in pngpread.c

+    and pngwutil.c.

+  Added checks in pngtest.c for png_create_*() returning NULL, and mentioned

+    in libpng.txt/libpng.3 the need for applications to check this.

+  Changed names of png_default_*() functions in pngtest to pngtest_*().

+  Changed return type of png_get_x|y_offset_*() from png_uint_32 to png_int_32.

+  Fixed some bugs in the unused PNG_INCH_CONVERSIONS functions in pngget.c

+  Set each pointer to NULL after freeing it in png_free_data().

+  Worked around a problem in pngconf.h; AIX's strings.h defines an "index"

+    macro that conflicts with libpng's png_color_16.index. (Dimitri

+    Papadapoulos)

+  Added "msvc" directory with MSVC++ project files (Simon-Pierre Cadieux).

+

+Version 1.0.7beta16 [June 4, 2000]

+  Revised the workaround of AIX string.h "index" bug.

+  Added a check for overlength PLTE chunk in pngrutil.c.

+  Added PNG_NO_POINTER_INDEXING macro to use array-indexing instead of pointer

+    indexing in pngrutil.c and pngwutil.c to accommodate a buggy compiler.

+  Added a warning in png_decompress_chunk() when it runs out of data, e.g.

+    when it tries to read an erroneous PhotoShop iCCP chunk.

+  Added PNG_USE_DLL macro.

+  Revised the copyright/disclaimer/license notice.

+  Added contrib/msvctest directory

+

+Version 1.0.7rc1 [June 9, 2000]

+  Corrected the definition of PNG_TRANSFORM_INVERT_ALPHA  (0x0400 not 0x0200)

+  Added contrib/visupng directory (Willem van Schaik)

+

+Version 1.0.7beta18 [June 23, 2000]

+  Revised PNGAPI definition, and pngvcrd.c to work with __GCC__

+    and do not redefine PNGAPI if it is passed in via a compiler directive.

+  Revised visupng/PngFile.c to remove returns from within the Try block.

+  Removed leading underscores from "_PNG_H" and "_PNG_SAVE_BSD_SOURCE" macros.

+  Updated contrib/visupng/cexcept.h to version 1.0.0.

+  Fixed bugs in pngwrite.c and pngwutil.c that prevented writing iCCP chunks.

+

+Version 1.0.7rc2 [June 28, 2000]

+  Updated license to include disclaimers required by UCITA.

+  Fixed "DJBPP" typo in pnggccrd.c introduced in beta18.

+

+Version 1.0.7 [July 1, 2000]

+  Revised the definition of "trans_values" in libpng.3/libpng.txt

+

+Version 1.0.8beta1 [July 8, 2000]

+  Added png_free(png_ptr, key) two places in pngpread.c to stop memory leaks.

+  Changed PNG_NO_STDIO to PNG_NO_CONSOLE_IO, several places in pngrutil.c and

+     pngwutil.c.

+  Changed PNG_EXPORT_VAR to use PNG_IMPEXP, in pngconf.h.

+  Removed unused "#include <assert.h>" from png.c

+  Added WindowsCE support.

+  Revised pnggccrd.c to work with gcc-2.95.2 and in the Cygwin environment.

+

+Version 1.0.8beta2 [July 10, 2000]

+  Added project files to the wince directory and made further revisions

+     of pngtest.c, pngrio.c, and pngwio.c in support of WindowsCE.

+

+Version 1.0.8beta3 [July 11, 2000]

+  Only set the PNG_FLAG_FREE_TRNS or PNG_FREE_TRNS flag in png_handle_tRNS()

+     for indexed-color input files to avoid potential double-freeing trans array

+     under some unusual conditions; problem was introduced in version 1.0.6f.

+  Further revisions to pngtest.c and files in the wince subdirectory.

+

+Version 1.0.8beta4 [July 14, 2000]

+  Added the files pngbar.png and pngbar.jpg to the distribution.

+  Added makefile.cygwin, and cygwin support in pngconf.h

+  Added PNG_NO_ZALLOC_ZERO macro (makes png_zalloc skip zeroing memory)

+

+Version 1.0.8rc1 [July 16, 2000]

+  Revised png_debug() macros and statements to eliminate compiler warnings.

+

+Version 1.0.8 [July 24, 2000]

+  Added png_flush() in pngwrite.c, after png_write_IEND().

+  Updated makefile.hpux to build a shared library.

+

+Version 1.0.9beta1 [November 10, 2000]

+  Fixed typo in scripts/makefile.hpux

+  Updated makevms.com in scripts and contrib/* and contrib/* (Martin Zinser)

+  Fixed seqence-point bug in contrib/pngminus/png2pnm (Martin Zinser)

+  Changed "cdrom.com" in documentation to "libpng.org"

+  Revised pnggccrd.c to get it all working, and updated makefile.gcmmx (Greg).

+  Changed type of "params" from voidp to png_voidp in png_read|write_png().

+  Make sure PNGAPI and PNG_IMPEXP are defined in pngconf.h.

+  Revised the 3 instances of WRITEFILE in pngtest.c.

+  Relocated "msvc" and "wince" project subdirectories into "dll" subdirectory.

+  Updated png.rc in dll/msvc project

+  Revised makefile.dec to define and use LIBPATH and INCPATH

+  Increased size of global png_libpng_ver[] array from 12 to 18 chars.

+  Made global png_libpng_ver[], png_sig[] and png_pass_*[] arrays const.

+  Removed duplicate png_crc_finish() from png_handle_bKGD() function.

+  Added a warning when application calls png_read_update_info() multiple times.

+  Revised makefile.cygwin

+  Fixed bugs in iCCP support in pngrutil.c and pngwutil.c.

+  Replaced png_set_empty_plte_permitted() with png_permit_mng_features().

+

+Version 1.0.9beta2 [November 19, 2000]

+  Renamed the "dll" subdirectory "projects".

+  Added borland project files to "projects" subdirectory.

+  Set VS_FF_PRERELEASE and VS_FF_PATCHED flags in msvc/png.rc when appropriate.

+  Add error message in png_set_compression_buffer_size() when malloc fails.

+

+Version 1.0.9beta3 [November 23, 2000]

+  Revised PNG_LIBPNG_BUILD_TYPE macro in png.h, used in the msvc project.

+  Removed the png_flush() in pngwrite.c that crashes some applications

+    that don't set png_output_flush_fn.

+  Added makefile.macosx and makefile.aix to scripts directory.

+

+Version 1.0.9beta4 [December 1, 2000]

+  Change png_chunk_warning to png_warning in png_check_keyword().

+  Increased the first part of msg buffer from 16 to 18 in png_chunk_error().

+

+Version 1.0.9beta5 [December 15, 2000]

+  Added support for filter method 64 (for PNG datastreams embedded in MNG).

+

+Version 1.0.9beta6 [December 18, 2000]

+  Revised png_set_filter() to accept filter method 64 when appropriate.

+  Added new PNG_HAVE_PNG_SIGNATURE bit to png_ptr->mode and use it to

+    help prevent applications from using MNG features in PNG datastreams.

+  Added png_permit_mng_features() function.

+  Revised libpng.3/libpng.txt.  Changed "filter type" to "filter method".

+

+Version 1.0.9rc1 [December 23, 2000]

+  Revised test for PNG_HAVE_PNG_SIGNATURE in pngrutil.c

+  Fixed error handling of unknown compression type in png_decompress_chunk().

+  In pngconf.h, define __cdecl when _MSC_VER is defined.

+

+Version 1.0.9beta7 [December 28, 2000]

+  Changed PNG_TEXT_COMPRESSION_zTXt to PNG_COMPRESSION_TYPE_BASE several places.

+  Revised memory management in png_set_hIST and png_handle_hIST in a backward

+    compatible manner.  PLTE and tRNS were revised similarly.

+  Revised the iCCP chunk reader to ignore trailing garbage.

+

+Version 1.0.9beta8 [January 12, 2001]

+  Moved pngasmrd.h into pngconf.h.

+  Improved handling of out-of-spec garbage iCCP chunks generated by PhotoShop.

+

+Version 1.0.9beta9 [January 15, 2001]

+  Added png_set_invalid, png_permit_mng_features, and png_mmx_supported to

+    wince and msvc project module definition files.

+  Minor revision of makefile.cygwin.

+  Fixed bug with progressive reading of narrow interlaced images in pngpread.c

+

+Version 1.0.9beta10 [January 16, 2001]

+  Do not typedef png_FILE_p in pngconf.h when PNG_NO_STDIO is defined.

+  Fixed "png_mmx_supported" typo in project definition files.

+

+Version 1.0.9beta11 [January 19, 2001]

+  Updated makefile.sgi to make shared library.

+  Removed png_mmx_support() function and disabled PNG_MNG_FEATURES_SUPPORTED

+    by default, for the benefit of DLL forward compatibility.  These will

+    be re-enabled in version 1.2.0.

+

+Version 1.0.9rc2 [January 22, 2001]

+  Revised cygwin support.

+

+Version 1.0.9 [January 31, 2001]

+  Added check of cygwin's ALL_STATIC in pngconf.h

+  Added "-nommx" parameter to contrib/gregbook/rpng2-win and rpng2-x demos.

+

+Version 1.0.10beta1 [March 14, 2001]

+  Revised makefile.dec, makefile.sgi, and makefile.sggcc; added makefile.hpgcc.

+  Reformatted libpng.3 to eliminate bad line breaks.

+  Added checks for _mmx_supported in the read_filter_row function of pnggccrd.c

+  Added prototype for png_mmx_support() near the top of pnggccrd.c

+  Moved some error checking from png_handle_IHDR to png_set_IHDR.

+  Added PNG_NO_READ_SUPPORTED and PNG_NO_WRITE_SUPPORTED macros.

+  Revised png_mmx_support() function in pnggccrd.c

+  Restored version 1.0.8 PNG_WRITE_EMPTY_PLTE_SUPPORTED behavior in pngwutil.c

+  Fixed memory leak in contrib/visupng/PngFile.c

+  Fixed bugs in png_combine_row() in pnggccrd.c and pngvcrd.c (C version)

+  Added warnings when retrieving or setting gamma=0.

+  Increased the first part of msg buffer from 16 to 18 in png_chunk_warning().

+

+Version 1.0.10rc1 [March 23, 2001]

+  Changed all instances of memcpy, strcpy, and strlen to png_memcpy, png_strcpy,

+    and png_strlen.

+  Revised png_mmx_supported() function in pnggccrd.c to return proper value.

+  Fixed bug in progressive reading (pngpread.c) with small images (height < 8).

+

+Version 1.0.10 [March 30, 2001]

+  Deleted extraneous space (introduced in 1.0.9) from line 42 of makefile.cygwin

+  Added beos project files (Chris Herborth)

+

+Version 1.0.11beta1 [April 3, 2001]

+  Added type casts on several png_malloc() calls (Dimitri Papadapoulos).

+  Removed a no-longer needed AIX work-around from pngconf.h

+  Changed several "//" single-line comments to C-style in pnggccrd.c

+

+Version 1.0.11beta2 [April 11, 2001]

+  Removed PNGAPI from several functions whose prototypes did not have PNGAPI.

+  Updated scripts/pngos2.def

+

+Version 1.0.11beta3 [April 14, 2001]

+  Added checking the results of many instances of png_malloc() for NULL

+

+Version 1.0.11beta4 [April 20, 2001]

+  Undid the changes from version 1.0.11beta3.  Added a check for NULL return

+    from user's malloc_fn().

+  Removed some useless type casts of the NULL pointer.

+  Added makefile.netbsd

+

+Version 1.0.11 [April 27, 2001]

+  Revised makefile.netbsd

+

+Version 1.0.12beta1 [May 14, 2001]

+  Test for Windows platform in pngconf.h when including malloc.h (Emmanuel Blot)

+  Updated makefile.cygwin and handling of Cygwin's ALL_STATIC in pngconf.h

+  Added some never-to-be-executed code in pnggccrd.c to quiet compiler warnings.

+  Eliminated the png_error about apps using png_read|write_init().  Instead,

+    libpng will reallocate the png_struct and info_struct if they are too small.

+    This retains future binary compatibility for old applications written for

+    libpng-0.88 and earlier.

+

+Version 1.2.0beta1 [May 6, 2001]

+  Bumped DLLNUM to 2.

+  Re-enabled PNG_MNG_FEATURES_SUPPORTED and enabled PNG_ASSEMBLER_CODE_SUPPORTED

+    by default.

+  Added runtime selection of MMX features.

+  Added png_set_strip_error_numbers function and related macros.

+

+Version 1.2.0beta2 [May 7, 2001]

+  Finished merging 1.2.0beta1 with version 1.0.11

+  Added a check for attempts to read or write PLTE in grayscale PNG datastreams.

+

+Version 1.2.0beta3 [May 17, 2001]

+  Enabled user memory function by default.

+  Modified png_create_struct so it passes user mem_ptr to user memory allocator.

+  Increased png_mng_features flag from png_byte to png_uint_32.

+  Bumped shared-library (so-number) and dll-number to 3.

+

+Version 1.2.0beta4 [June 23, 2001]

+  Check for missing profile length field in iCCP chunk and free chunk_data

+     in case of truncated iCCP chunk.

+  Bumped shared-library number to 3 in makefile.sgi and makefile.sggcc

+  Bumped dll-number from 2 to 3 in makefile.cygwin

+  Revised contrib/gregbook/rpng*-x.c to avoid a memory leak and to exit cleanly

+     if user attempts to run it on an 8-bit display.

+  Updated contrib/gregbook

+  Use png_malloc instead of png_zalloc to allocate palette in pngset.c

+  Updated makefile.ibmc

+  Added some typecasts to eliminate gcc 3.0 warnings.  Changed prototypes

+     of png_write_oFFS width and height from png_uint_32 to png_int_32.

+  Updated example.c

+  Revised prototypes for png_debug_malloc and png_debug_free in pngtest.c

+

+Version 1.2.0beta5 [August 8, 2001]

+  Revised contrib/gregbook

+  Revised makefile.gcmmx

+  Revised pnggccrd.c to conditionally compile some thread-unsafe code only

+     when PNG_THREAD_UNSAFE_OK is defined.

+  Added tests to prevent pngwutil.c from writing a bKGD or tRNS chunk with

+     value exceeding 2^bit_depth-1

+  Revised makefile.sgi and makefile.sggcc

+  Replaced calls to fprintf(stderr,...) with png_warning() in pnggccrd.c

+  Removed restriction that do_invert_mono only operate on 1-bit opaque files

+

+Version 1.2.0 [September 1, 2001]

+  Changed a png_warning() to png_debug() in pnggccrd.c

+  Fixed contrib/gregbook/rpng-x.c, rpng2-x.c to avoid crash with XFreeGC().

+

+Version 1.2.1beta1 [October 19, 2001]

+  Revised makefile.std in contrib/pngminus

+  Include background_1 in png_struct regardless of gamma support.

+  Revised makefile.netbsd and makefile.macosx, added makefile.darwin.

+  Revised example.c to provide more details about using row_callback().

+

+Version 1.2.1beta2 [October 25, 2001]

+  Added type cast to each NULL appearing in a function call, except for

+    WINCE functions.

+  Added makefile.so9.

+

+Version 1.2.1beta3 [October 27, 2001]

+  Removed type casts from all NULLs.

+  Simplified png_create_struct_2().

+

+Version 1.2.1beta4 [November 7, 2001]

+  Revised png_create_info_struct() and png_creat_struct_2().

+  Added error message if png_write_info() was omitted.

+  Type cast NULLs appearing in function calls when _NO_PROTO or

+    PNG_TYPECAST_NULL is defined.

+

+Version 1.2.1rc1 [November 24, 2001]

+  Type cast NULLs appearing in function calls except when PNG_NO_TYPECAST_NULL

+    is defined.

+  Changed typecast of "size" argument to png_size_t in pngmem.c calls to

+    the user malloc_fn, to agree with the prototype in png.h

+  Added a pop/push operation to pnggccrd.c, to preserve Eflag (Maxim Sobolev)

+  Updated makefile.sgi to recognize LIBPATH and INCPATH.

+  Updated various makefiles so "make clean" does not remove previous major

+    version of the shared library.

+

+Version 1.2.1rc2 [December 4, 2001]

+  Always allocate 256-entry internal palette, hist, and trans arrays, to

+    avoid out-of-bounds memory reference caused by invalid PNG datastreams.

+  Added a check for prefix_length > data_length in iCCP chunk handler.

+

+Version 1.2.1 [December 7, 2001]

+  None.

+

+Version 1.2.2beta1 [February 22, 2002]

+  Fixed a bug with reading the length of iCCP profiles (Larry Reeves).

+  Revised makefile.linux, makefile.gcmmx, and makefile.sgi to generate

+    libpng.a, libpng12.so (not libpng.so.3), and libpng12/png.h

+  Revised makefile.darwin to remove "-undefined suppress" option.

+  Added checks for gamma and chromaticity values over 21474.83, which exceed

+    the limit for PNG unsigned 32-bit integers when encoded.

+  Revised calls to png_create_read_struct() and png_create_write_struct()

+    for simpler debugging.

+  Revised png_zalloc() so zlib handles errors (uses PNG_FLAG_MALLOC_NULL_MEM_OK)

+

+Version 1.2.2beta2 [February 23, 2002]

+  Check chunk_length and idat_size for invalid (over PNG_MAX_UINT) lengths.

+  Check for invalid image dimensions in png_get_IHDR.

+  Added missing "fi;" in the install target of the SGI makefiles.

+  Added install-static to all makefiles that make shared libraries.

+  Always do gamma compensation when image is partially transparent.

+

+Version 1.2.2beta3 [March 7, 2002]

+  Compute background.gray and background_1.gray even when color_type is RGB

+    in case image gets reduced to gray later.

+  Modified shared-library makefiles to install pkgconfig/libpngNN.pc.

+  Export (with PNGAPI) png_zalloc, png_zfree, and png_handle_as_unknown

+  Removed unused png_write_destroy_info prototype from png.h

+  Eliminated incorrect use of width_mmx from pnggccrd.c in pixel_bytes == 8 case

+  Added install-shared target to all makefiles that make shared libraries.

+  Stopped a double free of palette, hist, and trans when not using free_me.

+  Added makefile.32sunu for Sun Ultra 32 and makefile.64sunu for Sun Ultra 64.

+

+Version 1.2.2beta4 [March 8, 2002]

+  Compute background.gray and background_1.gray even when color_type is RGB

+    in case image gets reduced to gray later (Jason Summers).

+  Relocated a misplaced /bin/rm in the "install-shared" makefile targets

+  Added PNG_1_0_X macro which can be used to build a 1.0.x-compatible library.

+

+Version 1.2.2beta5 [March 26, 2002]

+  Added missing PNGAPI to several function definitions.

+  Check for invalid bit_depth or color_type in png_get_IHDR(), and

+    check for missing PLTE or IHDR in png_push_read_chunk() (Matthias Clasen).

+  Revised iTXt support to accept NULL for lang and lang_key.

+  Compute gamma for color components of background even when color_type is gray.

+  Changed "()" to "{}" in scripts/libpng.pc.in.

+  Revised makefiles to put png.h and pngconf.h only in $prefix/include/libpngNN

+  Revised makefiles to make symlink to libpng.so.NN in addition to libpngNN.so

+

+Version 1.2.2beta6 [March 31, 2002]

+

+Version 1.0.13beta1 [March 31, 2002]

+  Prevent png_zalloc() from trying to memset memory that it failed to acquire.

+  Add typecasts of PNG_MAX_UINT in pngset_cHRM_fixed() (Matt Holgate).

+  Ensure that the right function (user or default) is used to free the

+    png_struct after an error in png_create_read_struct_2().

+

+Version 1.2.2rc1 [April 7, 2002]

+

+Version 1.0.13rc1 [April 7, 2002]

+  Save the ebx register in pnggccrd.c (Sami Farin)

+  Add "mem_ptr = png_ptr->mem_ptr" in png_destroy_write_struct() (Paul Gardner).

+  Updated makefiles to put headers in include/libpng and remove old include/*.h.

+

+Version 1.2.2 [April 15, 2002]

+

+Version 1.0.13 [April 15, 2002]

+  Revised description of png_set_filter() in libpng.3/libpng.txt.

+  Revised makefile.netbsd and added makefile.neNNbsd and makefile.freebsd

+

+Version 1.0.13patch01 [April 17, 2002]

+

+Version 1.2.2patch01 [April 17, 2002]

+  Changed ${PNGMAJ}.${PNGVER} bug to ${PNGVER} in makefile.sgi and

+    makefile.sggcc

+  Fixed VER -> PNGVER typo in makefile.macosx and added install-static to

+    install

+  Added install: target to makefile.32sunu and makefile.64sunu

+

+Version 1.0.13patch03 [April 18, 2002]

+

+Version 1.2.2patch03 [April 18, 2002]

+  Revised 15 makefiles to link libpng.a to libpngNN.a and the include libpng

+  subdirectory to libpngNN subdirectory without the full pathname.

+  Moved generation of libpng.pc from "install" to "all" in 15 makefiles.

+

+Version 1.2.3rc1 [April 28, 2002]

+  Added install-man target to 15 makefiles (Dimitri Papadopolous-Orfanos).

+  Added $(DESTDIR) feature to 24 makefiles (Tim Mooney)

+  Fixed bug with $prefix, should be $(prefix) in makefile.hpux.

+  Updated cygwin-specific portion of pngconf.h and revised makefile.cygwin

+  Added a link from libpngNN.pc to libpng.pc in 15 makefiles.

+  Added links from include/libpngNN/*.h to include/*.h in 24 makefiles.

+  Revised makefile.darwin to make relative links without full pathname.

+  Added setjmp() at the end of png_create_*_struct_2() in case user forgets

+    to put one in their application.

+  Restored png_zalloc() and png_zfree() prototypes to version 1.2.1 and

+    removed them from module definition files.

+

+Version 1.2.3rc2 [May 1, 2002]

+  Fixed bug in reporting number of channels in pngget.c and pngset.c,

+    that was introduced in version 1.2.2beta5.

+  Exported png_zalloc(), png_zfree(), png_default_read(), png_default_write(),

+    png_default_flush(), and png_push_fill_buffer() and included them in

+    module definition files.

+  Added "libpng.pc" dependency to the "install-shared" target in 15 makefiles.

+

+Version 1.2.3rc3 [May 1, 2002]

+  Revised prototype for png_default_flush()

+  Remove old libpng.pc and libpngNN.pc before installing new ones.

+

+Version 1.2.3rc4 [May 2, 2002]

+  Typos in *.def files (png_default_read|write -> png_default_read|write_data)

+  In makefiles, changed rm libpng.NN.pc to rm libpngNN.pc

+  Added libpng-config and libpngNN-config and modified makefiles to install

+    them.

+  Changed $(MANPATH) to $(DESTDIR)$(MANPATH) in makefiles

+  Added "Win32 DLL VB" configuration to projects/msvc/libpng.dsp

+

+Version 1.2.3rc5 [May 11, 2002]

+  Changed "error" and "message" in prototypes to "error_message" and

+    "warning_message" to avoid namespace conflict.

+  Revised 15 makefiles to build libpng-config from libpng-config-*.in

+  Once more restored png_zalloc and png_zfree to regular nonexported form.

+  Restored png_default_read|write_data, png_default_flush, png_read_fill_buffer

+    to nonexported form, but with PNGAPI, and removed them from module def

+    files.

+

+Version 1.2.3rc6 [May 14, 2002]

+  Removed "PNGAPI" from png_zalloc() and png_zfree() in png.c

+  Changed "Gz" to "Gd" in projects/msvc/libpng.dsp and zlib.dsp.

+  Removed leftover libpng-config "sed" script from four makefiles.

+  Revised libpng-config creating script in 16 makefiles.

+

+Version 1.2.3 [May 22, 2002]

+  Revised libpng-config target in makefile.cygwin.

+  Removed description of png_set_mem_fn() from documentation.

+  Revised makefile.freebsd.

+  Minor cosmetic changes to 15 makefiles, e.g., $(DI) = $(DESTDIR)/$(INCDIR).

+  Revised projects/msvc/README.txt

+  Changed -lpng to -lpngNN in LDFLAGS in several makefiles.

+

+Version 1.2.4beta1 [May 24, 2002]

+  Added libpng.pc and libpng-config to "all:" target in 16 makefiles.

+  Fixed bug in 16 makefiles: $(DESTDIR)/$(LIBPATH) to $(DESTDIR)$(LIBPATH)

+  Added missing "\" before closing double quote in makefile.gcmmx.

+  Plugged various memory leaks; added png_malloc_warn() and png_set_text_2()

+    functions.

+

+Version 1.2.4beta2 [June 25, 2002]

+  Plugged memory leak of png_ptr->current_text (Matt Holgate).

+  Check for buffer overflow before reading CRC in pngpread.c (Warwick Allison)

+  Added -soname to the loader flags in makefile.dec, makefile.sgi, and

+    makefile.sggcc.

+  Added "test-installed" target to makefile.linux, makefile.gcmmx,

+    makefile.sgi, and makefile.sggcc.

+

+Version 1.2.4beta3 [June 28, 2002]

+  Plugged memory leak of row_buf in pngtest.c when there is a png_error().

+  Detect buffer overflow in pngpread.c when IDAT is corrupted with extra data.

+  Added "test-installed" target to makefile.32sunu, makefile.64sunu,

+    makefile.beos, makefile.darwin, makefile.dec, makefile.macosx,

+    makefile.solaris, makefile.hpux, makefile.hpgcc, and makefile.so9.

+

+Version 1.2.4rc1 and 1.0.14rc1 [July 2, 2002]

+  Added "test-installed" target to makefile.cygwin and makefile.sco.

+  Revised pnggccrd.c to be able to back out version 1.0.x via PNG_1_0_X macro.

+

+Version 1.2.4 and 1.0.14 [July 8, 2002]

+  Changed png_warning() to png_error() when width is too large to process.

+

+Version 1.2.4patch01 [July 20, 2002]

+  Revised makefile.cygwin to use DLL number 12 instead of 13.

+

+Version 1.2.5beta1 [August 6, 2002]

+  Added code to contrib/gregbook/readpng2.c to ignore unused chunks.

+  Replaced toucan.png in contrib/gregbook (it has been corrupt since 1.0.11)

+  Removed some stray *.o files from contrib/gregbook.

+  Changed png_error() to png_warning() about "Too much data" in pngpread.c

+    and about "Extra compressed data" in pngrutil.c.

+  Prevent png_ptr->pass from exceeding 7 in png_push_finish_row().

+  Updated makefile.hpgcc

+  Updated png.c and pnggccrd.c handling of return from png_mmx_support()

+

+Version 1.2.5beta2 [August 15, 2002]

+  Only issue png_warning() about "Too much data" in pngpread.c when avail_in

+    is nonzero.

+  Updated makefiles to install a separate libpng.so.3 with its own rpath.

+

+Version 1.2.5rc1 and 1.0.15rc1 [August 24, 2002]

+  Revised makefiles to not remove previous minor versions of shared libraries.

+

+Version 1.2.5rc2 and 1.0.15rc2 [September 16, 2002]

+  Revised 13 makefiles to remove "-lz" and "-L$(ZLIBLIB)", etc., from shared

+    library loader directive.

+  Added missing "$OBJSDLL" line to makefile.gcmmx.

+  Added missing "; fi" to makefile.32sunu.

+

+Version 1.2.5rc3 and 1.0.15rc3 [September 18, 2002]

+  Revised libpng-config script.

+

+Version 1.2.5 and 1.0.15 [October 3, 2002]

+  Revised makefile.macosx, makefile.darwin, makefile.hpgcc, and makefile.hpux,

+    and makefile.aix.

+  Relocated two misplaced PNGAPI lines in pngtest.c

+

+Version 1.2.6beta1 [October 22, 2002]

+  Commented out warning about uninitialized mmx_support in pnggccrd.c.

+  Changed "IBMCPP__" flag to "__IBMCPP__" in pngconf.h.

+  Relocated two more misplaced PNGAPI lines in pngtest.c

+  Fixed memory overrun bug in png_do_read_filler() with 16-bit datastreams,

+    introduced in version 1.0.2.

+  Revised makefile.macosx, makefile.dec, makefile.aix, and makefile.32sunu.

+

+Version 1.2.6beta2 [November 1, 2002]

+  Added libpng-config "--ldopts" output.

+  Added "AR=ar" and "ARFLAGS=rc" and changed "ar rc" to "$(AR) $(ARFLAGS)"

+    in makefiles.

+

+Version 1.2.6beta3 [July 18, 2004]

+  Reverted makefile changes from version 1.2.6beta2 and some of the changes

+    from version 1.2.6beta1; these will be postponed until version 1.2.7.

+    Version 1.2.6 is going to be a simple bugfix release.

+  Changed the one instance of "ln -sf" to "ln -f -s" in each Sun makefile.

+  Fixed potential overrun in pngerror.c by using strncpy instead of memcpy.

+  Added "#!/bin/sh" at the top of configure, for recognition of the

+    'x' flag under Cygwin (Cosmin).

+  Optimized vacuous tests that silence compiler warnings, in png.c (Cosmin).

+  Added support for PNG_USER_CONFIG, in pngconf.h (Cosmin).

+  Fixed the special memory handler for Borland C under DOS, in pngmem.c

+    (Cosmin).

+  Removed some spurious assignments in pngrutil.c (Cosmin).

+  Replaced 65536 with 65536L, and 0xffff with 0xffffL, to silence warnings

+    on 16-bit platforms (Cosmin).

+  Enclosed shift op expressions in parentheses, to silence warnings (Cosmin).

+  Used proper type png_fixed_point, to avoid problems on 16-bit platforms,

+    in png_handle_sRGB() (Cosmin).

+  Added compression_type to png_struct, and optimized the window size

+    inside the deflate stream (Cosmin).

+  Fixed definition of isnonalpha(), in pngerror.c and pngrutil.c (Cosmin).

+  Fixed handling of unknown chunks that come after IDAT (Cosmin).

+  Allowed png_error() and png_warning() to work even if png_ptr == NULL

+    (Cosmin).

+  Replaced row_info->rowbytes with row_bytes in png_write_find_filter()

+    (Cosmin).

+  Fixed definition of PNG_LIBPNG_VER_DLLNUM (Simon-Pierre).

+  Used PNG_LIBPNG_VER and PNG_LIBPNG_VER_STRING instead of the hardcoded

+    values in png.c (Simon-Pierre, Cosmin).

+  Initialized png_libpng_ver[] with PNG_LIBPNG_VER_STRING (Simon-Pierre).

+  Replaced PNG_LIBPNG_VER_MAJOR with PNG_LIBPNG_VER_DLLNUM in png.rc

+    (Simon-Pierre).

+  Moved the definition of PNG_HEADER_VERSION_STRING near the definitions

+    of the other PNG_LIBPNG_VER_... symbols in png.h (Cosmin).

+  Relocated #ifndef PNGAPI guards in pngconf.h (Simon-Pierre, Cosmin).

+  Updated scripts/makefile.vc(a)win32 (Cosmin).

+  Updated the MSVC project (Simon-Pierre, Cosmin).

+  Updated the Borland C++ Builder project (Cosmin).

+  Avoided access to asm_flags in pngvcrd.c, if PNG_1_0_X is defined (Cosmin).

+  Commented out warning about uninitialized mmx_support in pngvcrd.c (Cosmin).

+  Removed scripts/makefile.bd32 and scripts/pngdef.pas (Cosmin).

+  Added extra guard around inclusion of Turbo C memory headers, in pngconf.h

+    (Cosmin).

+  Renamed projects/msvc/ to projects/visualc6/, and projects/borland/ to

+    projects/cbuilder5/ (Cosmin).

+  Moved projects/visualc6/png32ms.def to scripts/pngw32.def,

+    and projects/visualc6/png.rc to scripts/pngw32.rc (Cosmin).

+  Added projects/visualc6/pngtest.dsp; removed contrib/msvctest/ (Cosmin).

+  Changed line endings to DOS style in cbuilder5 and visualc6 files, even

+    in the tar.* distributions (Cosmin).

+  Updated contrib/visupng/VisualPng.dsp (Cosmin).

+  Updated contrib/visupng/cexcept.h to version 2.0.0 (Cosmin).

+  Added a separate distribution with "configure" and supporting files (Junichi).

+

+Version 1.2.6beta4 [July 28, 2004]

+  Added user ability to change png_size_t via a PNG_SIZE_T macro.

+  Added png_sizeof() and png_convert_size() functions.

+  Added PNG_SIZE_MAX (maximum value of a png_size_t variable.

+  Added check in png_malloc_default() for (size_t)size != (png_uint_32)size

+    which would indicate an overflow.

+  Changed sPLT failure action from png_error to png_warning and abandon chunk.

+  Changed sCAL and iCCP failures from png_error to png_warning and abandon.

+  Added png_get_uint_31(png_ptr, buf) function.

+  Added PNG_UINT_32_MAX macro.

+  Renamed PNG_MAX_UINT to PNG_UINT_31_MAX.

+  Made png_zalloc() issue a png_warning and return NULL on potential

+    overflow.

+  Turn on PNG_NO_ZALLOC_ZERO by default in version 1.2.x

+  Revised "clobber list" in pnggccrd.c so it will compile under gcc-3.4.

+  Revised Borland portion of png_malloc() to return NULL or issue

+    png_error() according to setting of PNG_FLAG_MALLOC_NULL_MEM_OK.

+  Added PNG_NO_SEQUENTIAL_READ_SUPPORTED macro to conditionally remove

+    sequential read support.

+  Added some "#if PNG_WRITE_SUPPORTED" blocks.

+  Added #ifdef to remove some redundancy in png_malloc_default().

+  Use png_malloc instead of png_zalloc to allocate the pallete.

+

+Version 1.0.16rc1 and 1.2.6rc1 [August 4, 2004]

+  Fixed buffer overflow vulnerability in png_handle_tRNS()

+  Fixed integer arithmetic overflow vulnerability in png_read_png().

+  Fixed some harmless bugs in png_handle_sBIT, etc, that would cause

+    duplicate chunk types to go undetected.

+  Fixed some timestamps in the -config version

+  Rearranged order of processing of color types in png_handle_tRNS().

+  Added ROWBYTES macro to calculate rowbytes without integer overflow.

+  Updated makefile.darwin and removed makefile.macosx from scripts directory.

+  Imposed default one million column, one-million row limits on the image

+    dimensions, and added png_set_user_limits() function to override them.

+  Revised use of PNG_SET_USER_LIMITS_SUPPORTED macro.

+  Fixed wrong cast of returns from png_get_user_width|height_max().

+  Changed some "keep the compiler happy" from empty statements to returns,

+  Revised libpng.txt to remove 1.2.x stuff from the 1.0.x distribution

+

+Version 1.0.16rc2 and 1.2.6rc2 [August 7, 2004]

+  Revised makefile.darwin and makefile.solaris.  Removed makefile.macosx.

+  Revised pngtest's png_debug_malloc() to use png_malloc() instead of

+    png_malloc_default() which is not supposed to be exported.

+  Fixed off-by-one error in one of the conversions to PNG_ROWBYTES() in

+    pngpread.c.  Bug was introduced in 1.2.6rc1.

+  Fixed bug in RGB to RGBX transformation introduced in 1.2.6rc1.

+  Fixed old bug in RGB to Gray transformation.

+  Fixed problem with 64-bit compilers by casting arguments to abs()

+    to png_int_32.

+  Changed "ln -sf" to "ln -f -s" in three makefiles (solaris, sco, so9).

+  Changed "HANDLE_CHUNK_*" to "PNG_HANDLE_CHUNK_*" (Cosmin)

+  Added "-@/bin/rm -f $(DL)/$(LIBNAME).so.$(PNGMAJ)" to 15 *NIX makefiles.

+  Added code to update the row_info->colortype in png_do_read_filler() (MSB).

+

+Version 1.0.16rc3 and 1.2.6rc3 [August 9, 2004]

+  Eliminated use of "abs()" in testing cHRM and gAMA values, to avoid

+    trouble with some 64-bit compilers.  Created PNG_OUT_OF_RANGE() macro.

+  Revised documentation of png_set_keep_unknown_chunks().

+  Check handle_as_unknown status in pngpread.c, as in pngread.c previously.

+  Moved  "PNG_HANDLE_CHUNK_*" macros out of PNG_INTERNAL section of png.h

+  Added "rim" definitions for CONST4 and CONST6 in pnggccrd.c

+

+Version 1.0.16rc4 and 1.2.6rc4 [August 10, 2004]

+  Fixed mistake in pngtest.c introduced in 1.2.6rc2 (declaration of

+    "pinfo" was out of place).

+

+Version 1.0.16rc5 and 1.2.6rc5 [August 10, 2004]

+  Moved  "PNG_HANDLE_CHUNK_*" macros out of PNG_ASSEMBLER_CODE_SUPPORTED

+     section of png.h where they were inadvertently placed in version rc3.

+

+Version 1.2.6 and 1.0.16 [August 15, 2004]

+  Revised pngtest so memory allocation testing is only done when PNG_DEBUG==1.

+

+Version 1.2.7beta1 [August 26, 2004]

+  Removed unused pngasmrd.h file.

+  Removed references to uu.net for archived files.  Added references to

+    PNG Spec (second edition) and the PNG ISO/IEC Standard.

+  Added "test-dd" target in 15 makefiles, to run pngtest in DESTDIR.

+  Fixed bug with "optimized window size" in the IDAT datastream, that

+    causes libpng to write PNG files with incorrect zlib header bytes.

+

+Version 1.2.7beta2 [August 28, 2004]

+  Fixed bug with sCAL chunk and big-endian machines (David Munro).

+  Undid new code added in 1.2.6rc2 to update the color_type in

+    png_set_filler().

+  Added png_set_add_alpha() that updates color type.

+

+Version 1.0.17rc1 and 1.2.7rc1 [September 4, 2004]

+  Revised png_set_strip_filler() to not remove alpha if color_type has alpha.

+

+Version 1.2.7 and 1.0.17 [September 12, 2004]

+  Added makefile.hp64

+  Changed projects/msvc/png32ms.def to scripts/png32ms.def in makefile.cygwin

+

+Version 1.2.8beta1 [November 1, 2004]

+  Fixed bug in png_text_compress() that would fail to complete a large block.

+  Fixed bug, introduced in libpng-1.2.7, that overruns a buffer during

+    strip alpha operation in png_do_strip_filler().

+  Added PNG_1_2_X definition in pngconf.h

+  Use #ifdef to comment out png_info_init in png.c and png_read_init in

+    pngread.c (as of 1.3.0)

+

+Version 1.2.8beta2 [November 2, 2004]

+  Reduce color_type to a nonalpha type after strip alpha operation in

+    png_do_strip_filler().

+

+Version 1.2.8beta3 [November 3, 2004]

+  Revised definitions of PNG_MAX_UINT_32, PNG_MAX_SIZE, and PNG_MAXSUM

+

+Version 1.2.8beta4 [November 12, 2004]

+  Fixed (again) definition of PNG_LIBPNG_VER_DLLNUM in png.h (Cosmin).

+  Added PNG_LIBPNG_BUILD_PRIVATE in png.h (Cosmin).

+  Set png_ptr->zstream.data_type to Z_BINARY, to avoid unnecessary detection

+    of data type in deflate (Cosmin).

+  Deprecated but continue to support SPECIALBUILD and PRIVATEBUILD in favor of

+    PNG_LIBPNG_BUILD_SPECIAL_STRING and PNG_LIBPNG_BUILD_PRIVATE_STRING.

+

+Version 1.2.8beta5 [November 20, 2004]

+  Use png_ptr->flags instead of png_ptr->transformations to pass

+    PNG_STRIP_ALPHA info to png_do_strip_filler(), to preserve ABI

+    compatibility.

+  Revised handling of SPECIALBUILD, PRIVATEBUILD,

+    PNG_LIBPNG_BUILD_SPECIAL_STRING and PNG_LIBPNG_BUILD_PRIVATE_STRING.

+

+Version 1.2.8rc1 [November 24, 2004]

+  Moved handling of BUILD macros from pngconf.h to png.h

+  Added definition of PNG_LIBPNG_BASE_TYPE in png.h, inadvertently

+    omitted from beta5.

+  Revised scripts/pngw32.rc

+  Despammed mailing addresses by masking "@" with "at".

+  Inadvertently installed a supposedly faster test version of pngrutil.c

+

+Version 1.2.8rc2 [November 26, 2004]

+  Added two missing "\" in png.h

+  Change tests in pngread.c and pngpread.c to

+    if (png_ptr->transformations || (png_ptr->flags&PNG_FLAG_STRIP_ALPHA))

+       png_do_read_transformations(png_ptr);

+

+Version 1.2.8rc3 [November 28, 2004]

+  Reverted pngrutil.c to version libpng-1.2.8beta5.

+  Added scripts/makefile.elf with supporting code in pngconf.h for symbol

+    versioning (John Bowler).

+

+Version 1.2.8rc4 [November 29, 2004]

+  Added projects/visualc7 (Simon-pierre).

+

+Version 1.2.8rc5 [November 29, 2004]

+  Fixed new typo in scripts/pngw32.rc

+

+Version 1.2.8 [December 3, 2004]

+  Removed projects/visualc7, added projects/visualc71.

+

+Version 1.2.9beta1 [February 21, 2006]

+  Initialized some structure members in pngwutil.c to avoid gcc-4.0.0 complaints

+  Revised man page and libpng.txt to make it clear that one should not call

+    png_read_end or png_write_end after png_read_png or png_write_png.

+  Updated references to png-mng-implement mailing list.

+  Fixed an incorrect typecast in pngrutil.c

+  Added PNG_NO_READ_SUPPORTED conditional for making a write-only library.

+  Added PNG_NO_WRITE_INTERLACING_SUPPORTED conditional.

+  Optimized alpha-inversion loops in pngwtran.c

+  Moved test for nonzero gamma outside of png_build_gamma_table() in pngrtran.c

+  Make sure num_trans is <= 256 before copying data in png_set_tRNS().

+  Make sure num_palette is <= 256 before copying data in png_set_PLTE().

+  Interchanged order of write_swap_alpha and write_invert_alpha transforms.

+  Added parentheses in the definition of PNG_LIBPNG_BUILD_TYPE (Cosmin).

+  Optimized zlib window flag (CINFO) in contrib/pngsuite/*.png (Cosmin).

+  Updated scripts/makefile.bc32 for Borland C++ 5.6 (Cosmin).

+  Exported png_get_uint_32, png_save_uint_32, png_get_uint_16, png_save_uint_16,

+    png_get_int_32, png_save_int_32, png_get_uint_31 (Cosmin).

+  Added type cast (png_byte) in png_write_sCAL() (Cosmin).

+  Fixed scripts/makefile.cygwin (Christian Biesinger, Cosmin).

+  Default iTXt support was inadvertently enabled.

+

+Version 1.2.9beta2 [February 21, 2006]

+  Check for png_rgb_to_gray and png_gray_to_rgb read transformations before

+    checking for png_read_dither in pngrtran.c

+  Revised checking of chromaticity limits to accommodate extended RGB

+    colorspace (John Denker).

+  Changed line endings in some of the project files to CRLF, even in the

+    "Unix" tar distributions (Cosmin).

+  Made png_get_int_32 and png_save_int_32 always available (Cosmin).

+  Updated scripts/pngos2.def, scripts/pngw32.def and projects/wince/png32ce.def

+    with the newly exported functions.

+  Eliminated distributions without the "configure" script.

+  Updated INSTALL instructions.

+

+Version 1.2.9beta3 [February 24, 2006]

+  Fixed CRCRLF line endings in contrib/visupng/VisualPng.dsp

+  Made libpng.pc respect EXEC_PREFIX (D. P. Kreil, J. Bowler)

+  Removed reference to pngasmrd.h from Makefile.am

+  Renamed CHANGES to ChangeLog.

+  Renamed LICENSE to COPYING.

+  Renamed ANNOUNCE to NEWS.

+  Created AUTHORS file.

+

+Version 1.2.9beta4 [March 3, 2006]

+  Changed definition of PKGCONFIG from $prefix/lib to $libdir in configure.ac

+  Reverted to filenames LICENSE and ANNOUNCE; removed AUTHORS and COPYING.

+  Removed newline from the end of some error and warning messages.

+  Removed test for sqrt() from configure.ac and configure.

+  Made swap tables in pngtrans.c PNG_CONST (Carlo Bramix).

+  Disabled default iTXt support that was inadvertently enabled in

+    libpng-1.2.9beta1.

+  Added "OS2" to list of systems that don't need underscores, in pnggccrd.c

+  Removed libpng version and date from *.c files.

+

+Version 1.2.9beta5 [March 4, 2006]

+  Removed trailing blanks from source files.

+  Put version and date of latest change in each source file, and changed

+    copyright year accordingly.

+  More cleanup of configure.ac, Makefile.am, and associated scripts.

+  Restored scripts/makefile.elf which was inadvertently deleted.

+

+Version 1.2.9beta6 [March 6, 2006]

+  Fixed typo (RELEASE) in configuration files.

+

+Version 1.2.9beta7 [March 7, 2006]

+  Removed libpng.vers and libpng.sym from libpng12_la_SOURCES in Makefile.am

+  Fixed inconsistent #ifdef's around png_sig_bytes() and png_set_sCAL_s()

+    in png.h.

+  Updated makefile.elf as suggested by debian.

+  Made cosmetic changes to some makefiles, adding LN_SF and other macros.

+  Made some makefiles accept "exec_prefix".

+

+Version 1.2.9beta8 [March 9, 2006]

+  Fixed some "#if defined (..." which should be "#if defined(..."

+    Bug introduced in libpng-1.2.8.

+  Fixed inconsistency in definition of png_default_read_data()

+  Restored blank that was lost from makefile.sggcc "clean" target in beta7.

+  Revised calculation of "current" and "major" for irix in ltmain.sh

+  Changed "mkdir" to "MKDIR_P" in some makefiles.

+  Separated PNG_EXPAND and PNG_EXPAND_tRNS.

+  Added png_set_expand_gray_1_2_4_to_8() and deprecated

+    png_set_gray_1_2_4_to_8() which also expands tRNS to alpha.

+

+Version 1.2.9beta9 [March 10, 2006]

+  Include "config.h" in pngconf.h when available.

+  Added some checks for NULL png_ptr or NULL info_ptr (timeless)

+

+Version 1.2.9beta10 [March 20, 2006]

+  Removed extra CR from contrib/visualpng/VisualPng.dsw (Cosmin)

+  Made pnggccrd.c PIC-compliant (Christian Aichinger).

+  Added makefile.mingw (Wolfgang Glas).

+  Revised pngconf.h MMX checking.

+

+Version 1.2.9beta11 [March 22, 2006]

+  Fixed out-of-order declaration in pngwrite.c that was introduced in beta9

+  Simplified some makefiles by using LIBSO, LIBSOMAJ, and LIBSOVER macros.

+

+Version 1.2.9rc1 [March 31, 2006]

+  Defined PNG_USER_PRIVATEBUILD when including "pngusr.h" (Cosmin).

+  Removed nonsensical assertion check from pngtest.c (Cosmin).

+

+Version 1.2.9 [April 14, 2006]

+  Revised makefile.beos and added "none" selector in ltmain.sh

+

+Version 1.2.10beta1 [April 15, 2006]

+  Renamed "config.h" to "png_conf.h" and revised Makefile.am to add

+    -DPNG_BUILDING_LIBPNG to compile directive, and modified pngconf.h

+    to include png_conf.h only when PNG_BUILDING_LIBPNG is defined.

+

+Version 1.2.10beta2 [April 15, 2006]

+  Manually updated Makefile.in and configure.  Changed png_conf.h.in

+    back to config.h.

+

+Version 1.2.10beta3 [April 15, 2006]

+  Change png_conf.h back to config.h in pngconf.h.

+

+Version 1.2.10beta4 [April 16, 2006]

+  Change PNG_BUILDING_LIBPNG to PNG_CONFIGURE_LIBPNG in config/Makefile*.

+

+Version 1.2.10beta5 [April 16, 2006]

+  Added a configure check for compiling assembler code in pnggccrd.c

+

+Version 1.2.10beta6 [April 17, 2006]

+  Revised the configure check for pnggccrd.c

+  Moved -DPNG_CONFIGURE_LIBPNG into @LIBPNG_DEFINES@

+  Added @LIBPNG_DEFINES@ to arguments when building libpng.sym

+

+Version 1.2.10beta7 [April 18, 2006]

+  Change "exec_prefix=$prefix" to "exec_prefix=$(prefix)" in makefiles.

+

+Version 1.2.10rc1 [April 19, 2006]

+  Ensure pngconf.h doesn't define both PNG_USE_PNGGCCRD and PNG_USE_PNGVCRD

+  Fixed "LN_FS" typo in makefile.sco and makefile.solaris.

+

+Version 1.2.10rc2 [April 20, 2006]

+  Added a backslash between -DPNG_CONFIGURE_LIBPNG and -DPNG_NO_ASSEMBLER_CODE

+   in configure.ac and configure

+  Made the configure warning about versioned symbols less arrogant.

+

+Version 1.2.10rc3 [April 21, 2006]

+  Added a note in libpng.txt that png_set_sig_bytes(8) can be used when

+    writing an embedded PNG without the 8-byte signature.

+  Revised makefiles and configure to avoid making links to libpng.so.*

+

+Version 1.2.10 [April 23, 2006]

+  Reverted configure to "rc2" state.

+

+Version 1.2.11beta1 [May 31, 2006]

+  scripts/libpng.pc.in contained "configure" style version info and would

+    not work with makefiles.

+  The shared-library makefiles were linking to libpng.so.0 instead of

+    libpng.so.3 compatibility as the library.

+

+Version 1.2.11beta2 [June 2, 2006]

+  Increased sprintf buffer from 50 to 52 chars in pngrutil.c to avoid

+    buffer overflow.

+  Fixed bug in example.c (png_set_palette_rgb -> png_set_palette_to_rgb)

+

+Version 1.2.11beta3 [June 5, 2006]

+  Prepended "#! /bin/sh" to ltmail.sh and contrib/pngminus/*.sh (Cosmin).

+  Removed the accidental leftover Makefile.in~ (Cosmin).

+  Avoided potential buffer overflow and optimized buffer in

+    png_write_sCAL(), png_write_sCAL_s() (Cosmin).

+  Removed the include directories and libraries from CFLAGS and LDFLAGS

+    in scripts/makefile.gcc (Nelson A. de Oliveira, Cosmin).

+

+Version 1.2.11beta4 [June 6, 2006]

+  Allow zero-length IDAT chunks after the entire zlib datastream, but not

+    after another intervening chunk type.

+

+Version 1.0.19rc1, 1.2.11rc1 [June 13, 2006]

+  Deleted extraneous square brackets from [config.h] in configure.ac

+

+Version 1.0.19rc2, 1.2.11rc2 [June 14, 2006]

+  Added prototypes for PNG_INCH_CONVERSIONS functions to png.h

+  Revised INSTALL and autogen.sh

+  Fixed typo in several makefiles (-W1 should be -Wl)

+  Added typedef for png_int_32 and png_uint_32 on 64-bit systems.

+

+Version 1.0.19rc3, 1.2.11rc3 [June 15, 2006]

+  Removed the new typedefs for 64-bit systems (delay until version 1.4.0)

+  Added one zero element to png_gamma_shift[] array in pngrtran.c to avoid

+    reading out of bounds.

+

+Version 1.0.19rc4, 1.2.11rc4 [June 15, 2006]

+  Really removed the new typedefs for 64-bit systems.

+

+Version 1.0.19rc5, 1.2.11rc5 [June 22, 2006]

+  Removed png_sig_bytes entry from scripts/pngw32.def

+

+Version 1.0.19, 1.2.11 [June 26, 2006]

+  None.

+

+Version 1.0.20, 1.2.12 [June 27, 2006]

+  Really increased sprintf buffer from 50 to 52 chars in pngrutil.c to avoid

+    buffer overflow.

+

+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 (CVE-2006-7244)

+

+Version 1.0.21, 1.2.13 [November 14, 2006]

+  Fix potential buffer overflow in sPLT chunk handler.

+  Fix Makefile.am to not try to link to noexistent files.

+  Check all exported functions for NULL png_ptr.

+

+Version 1.2.14beta1 [November 17, 2006]

+  Relocated three misplaced tests for NULL png_ptr.

+  Built Makefile.in with automake-1.9.6 instead of 1.9.2.

+  Build configure with autoconf-2.60 instead of 2.59

+

+Version 1.2.14beta2 [November 17, 2006]

+  Added some typecasts in png_zalloc().

+

+Version 1.2.14rc1 [November 20, 2006]

+  Changed "strtod" to "png_strtod" in pngrutil.c

+

+Version 1.0.22, 1.2.14    [November 27, 2006]

+  Added missing "$(srcdir)" in Makefile.am and Makefile.in

+

+Version 1.2.15beta1 [December 3, 2006]

+  Generated configure with autoconf-2.61 instead of 2.60

+  Revised configure.ac to update libpng.pc and libpng-config.

+

+Version 1.2.15beta2 [December 3, 2006]

+  Always export MMX asm functions, just stubs if not building pnggccrd.c

+

+Version 1.2.15beta3 [December 4, 2006]

+  Add "png_bytep" typecast to profile while calculating length in pngwutil.c

+

+Version 1.2.15beta4 [December 7, 2006]

+  Added scripts/CMakeLists.txt

+  Changed PNG_NO_ASSEMBLER_CODE to PNG_NO_MMX_CODE in scripts, like 1.4.0beta

+

+Version 1.2.15beta5 [December 7, 2006]

+  Changed some instances of PNG_ASSEMBLER_* to PNG_MMX_* in pnggccrd.c

+  Revised scripts/CMakeLists.txt

+

+Version 1.2.15beta6 [December 13, 2006]

+  Revised scripts/CMakeLists.txt and configure.ac

+

+Version 1.2.15rc1 [December 18, 2006]

+  Revised scripts/CMakeLists.txt

+

+Version 1.2.15rc2 [December 21, 2006]

+  Added conditional #undef jmpbuf in pngtest.c to undo #define in AIX headers.

+  Added scripts/makefile.nommx

+

+Version 1.2.15rc3 [December 25, 2006]

+  Fixed shared library numbering error that was introduced in 1.2.15beta6.

+

+Version 1.2.15rc4 [December 27, 2006]

+  Fixed handling of rgb_to_gray when png_ptr->color.gray isn't set.

+

+Version 1.2.15rc5 [December 31, 2006]

+  Revised handling of rgb_to_gray.

+

+Version 1.2.15 [January 5, 2007]

+  Added some (unsigned long) typecasts in pngtest.c to avoid printing errors.

+

+Version 1.2.16beta1 [January 6, 2007]

+  Fix bugs in makefile.nommx

+

+Version 1.2.16beta2 [January 16, 2007]

+  Revised scripts/CMakeLists.txt

+

+Version 1.2.16 [January 31, 2007]

+  No changes.

+

+Version 1.2.17beta1 [March 6, 2007]

+  Revised scripts/CMakeLists.txt to install both shared and static libraries.

+  Deleted a redundant line from pngset.c.

+

+Version 1.2.17beta2 [April 26, 2007]

+  Relocated misplaced test for png_ptr == NULL in pngpread.c

+  Change "==" to "&" for testing PNG_RGB_TO_GRAY_ERR & PNG_RGB_TO_GRAY_WARN

+    flags.

+  Changed remaining instances of PNG_ASSEMBLER_* to PNG_MMX_*

+  Added pngerror() when write_IHDR fails in deflateInit2().

+  Added "const" to some array declarations.

+  Mention examples of libpng usage in the libpng*.txt and libpng.3 documents.

+

+Version 1.2.17rc1 [May 4, 2007]

+  No changes.

+

+Version 1.2.17rc2 [May 8, 2007]

+  Moved several PNG_HAVE_* macros out of PNG_INTERNAL because applications

+    calling set_unknown_chunk_location() need them.

+  Changed transformation flag from PNG_EXPAND_tRNS to PNG_EXPAND in

+    png_set_expand_gray_1_2_4_to_8().

+  Added png_ptr->unknown_chunk to hold working unknown chunk data, so it

+    can be free'ed in case of error.  Revised unknown chunk handling in

+    pngrutil.c and pngpread.c to use this structure.

+

+Version 1.2.17rc3 [May 8, 2007]

+  Revised symbol-handling in configure script.

+

+Version 1.2.17rc4 [May 10, 2007]

+  Revised unknown chunk handling to avoid storing unknown critical chunks.

+

+Version 1.0.25 [May 15, 2007]

+Version 1.2.17 [May 15, 2007]

+  Added "png_ptr->num_trans=0" before error return in png_handle_tRNS,

+    to eliminate a vulnerability (CVE-2007-2445, CERT VU#684664)

+

+Version 1.0.26 [May 15, 2007]

+Version 1.2.18 [May 15, 2007]

+  Reverted the libpng-1.2.17rc3 change to symbol-handling in configure script

+

+Version 1.2.19beta1 [May 18, 2007]

+  Changed "const static" to "static PNG_CONST" everywhere, mostly undoing

+    change of libpng-1.2.17beta2.  Changed other "const" to "PNG_CONST"

+  Changed some handling of unused parameters, to avoid compiler warnings.

+    "if (unused == NULL) return;" becomes "unused = unused".

+

+Version 1.2.19beta2 [May 18, 2007]

+  Only use the valid bits of tRNS value in png_do_expand() (Brian Cartier)

+

+Version 1.2.19beta3 [May 19, 2007]

+  Add some "png_byte" typecasts in png_check_keyword() and write new_key

+  instead of key in zTXt chunk (Kevin Ryde).

+

+Version 1.2.19beta4 [May 21, 2007]

+  Add png_snprintf() function and use it in place of sprint() for improved

+    defense against buffer overflows.

+

+Version 1.2.19beta5 [May 21, 2007]

+  Fixed png_handle_tRNS() to only use the valid bits of tRNS value.

+  Changed handling of more unused parameters, to avoid compiler warnings.

+  Removed some PNG_CONST in pngwutil.c to avoid compiler warnings.

+

+Version 1.2.19beta6 [May 22, 2007]

+  Added some #ifdef PNG_MMX_CODE_SUPPORTED where needed in pngvcrd.c

+  Added a special "_MSC_VER" case that defines png_snprintf to _snprintf

+

+Version 1.2.19beta7 [May 22, 2007]

+  Squelched png_squelch_warnings() in pnggccrd.c and added

+    an #ifdef PNG_MMX_CODE_SUPPORTED block around the declarations that caused

+    the warnings that png_squelch_warnings was squelching.

+

+Version 1.2.19beta8 [May 22, 2007]

+  Removed __MMX__ from test in pngconf.h.

+

+Version 1.2.19beta9 [May 23, 2007]

+  Made png_squelch_warnings() available via PNG_SQUELCH_WARNINGS macro.

+  Revised png_squelch_warnings() so it might work.

+  Updated makefile.sgcc and makefile.solaris; added makefile.solaris-x86.

+

+Version 1.2.19beta10 [May 24, 2007]

+  Resquelched png_squelch_warnings(), use "__attribute__((used))" instead.

+

+Version 1.4.0beta1 [April 20, 2006]

+  Enabled iTXt support (changes png_struct, thus requires so-number change).

+  Cleaned up PNG_ASSEMBLER_CODE_SUPPORTED vs PNG_MMX_CODE_SUPPORTED

+  Eliminated PNG_1_0_X and PNG_1_2_X macros.

+  Removed deprecated functions png_read_init, png_write_init, png_info_init,

+    png_permit_empty_plte, png_set_gray_1_2_4_to_8, png_check_sig, and

+    removed the deprecated macro PNG_MAX_UINT.

+  Moved "PNG_INTERNAL" parts of png.h and pngconf.h into pngintrn.h

+  Removed many WIN32_WCE #ifdefs (Cosmin).

+  Reduced dependency on C-runtime library when on Windows (Simon-Pierre)

+  Replaced sprintf() with png_sprintf() (Simon-Pierre)

+

+Version 1.4.0beta2 [April 20, 2006]

+  Revised makefiles and configure to avoid making links to libpng.so.*

+  Moved some leftover MMX-related defines from pngconf.h to pngintrn.h

+  Updated scripts/pngos2.def, pngw32.def, and projects/wince/png32ce.def

+

+Version 1.4.0beta3 [May 10, 2006]

+  Updated scripts/pngw32.def to comment out MMX functions.

+  Added PNG_NO_GET_INT_32 and PNG_NO_SAVE_INT_32 macros.

+  Scripts/libpng.pc.in contained "configure" style version info and would

+    not work with makefiles.

+  Revised pngconf.h and added pngconf.h.in, so makefiles and configure can

+    pass defines to libpng and applications.

+

+Version 1.4.0beta4 [May 11, 2006]

+  Revised configure.ac, Makefile.am, and many of the makefiles to write

+    their defines in pngconf.h.

+

+Version 1.4.0beta5 [May 15, 2006]

+  Added a missing semicolon in Makefile.am and Makefile.in

+  Deleted extraneous square brackets from configure.ac

+

+Version 1.4.0beta6 [June 2, 2006]

+  Increased sprintf buffer from 50 to 52 chars in pngrutil.c to avoid

+    buffer overflow.

+  Changed sonum from 0 to 1.

+  Removed unused prototype for png_check_sig() from png.h

+

+Version 1.4.0beta7 [June 16, 2006]

+  Exported png_write_sig (Cosmin).

+  Optimized buffer in png_handle_cHRM() (Cosmin).

+  Set pHYs = 2835 x 2835 pixels per meter, and added

+    sCAL = 0.352778e-3 x 0.352778e-3 meters, in pngtest.png (Cosmin).

+  Added png_set_benign_errors(), png_benign_error(), png_chunk_benign_error().

+  Added typedef for png_int_32 and png_uint_32 on 64-bit systems.

+  Added "(unsigned long)" typecast on png_uint_32 variables in printf lists.

+

+Version 1.4.0beta8 [June 22, 2006]

+  Added demonstration of user chunk support in pngtest.c, to support the

+    public sTER chunk and a private vpAg chunk.

+

+Version 1.4.0beta9 [July 3, 2006]

+  Removed ordinals from scripts/pngw32.def and removed png_info_int and

+    png_set_gray_1_2_4_to_8 entries.

+  Inline call of png_get_uint_32() in png_get_uint_31().

+  Use png_get_uint_31() to get vpAg width and height in pngtest.c

+  Removed WINCE and Netware projects.

+  Removed standalone Y2KINFO file.

+

+Version 1.4.0beta10 [July 12, 2006]

+  Eliminated automatic copy of pngconf.h to pngconf.h.in from configure and

+    some makefiles, because it was not working reliably.  Instead, distribute

+    pngconf.h.in along with pngconf.h and cause configure and some of the

+    makefiles to update pngconf.h from pngconf.h.in.

+  Added pngconf.h to DEPENDENCIES in Makefile.am

+

+Version 1.4.0beta11 [August 19, 2006]

+  Removed AC_FUNC_MALLOC from configure.ac.

+  Added a warning when writing iCCP profile with mismatched profile length.

+  Patched pnggccrd.c to assemble on x86_64 platforms.

+  Moved chunk header reading into a separate function png_read_chunk_header()

+    in pngrutil.c.  The chunk header (len+sig) is now serialized in a single

+    operation (Cosmin).

+  Implemented support for I/O states. Added png_ptr member io_state, and

+    functions png_get_io_chunk_name() and png_get_io_state() in pngget.c

+    (Cosmin).

+  Added png_get_io_chunk_name and png_get_io_state to scripts/*.def (Cosmin).

+  Renamed scripts/pngw32.* to scripts/pngwin.* (Cosmin).

+  Removed the include directories and libraries from CFLAGS and LDFLAGS

+    in scripts/makefile.gcc (Cosmin).

+  Used png_save_uint_32() to set vpAg width and height in pngtest.c (Cosmin).

+  Cast to proper type when getting/setting vpAg units in pngtest.c (Cosmin).

+  Added pngintrn.h to the Visual C++ projects (Cosmin).

+  Removed scripts/list (Cosmin).

+  Updated copyright year in scripts/pngwin.def (Cosmin).

+  Removed PNG_TYPECAST_NULL and used standard NULL consistently (Cosmin).

+  Disallowed the user to redefine png_size_t, and enforced a consistent use

+    of png_size_t across libpng (Cosmin).

+  Changed the type of png_ptr->rowbytes, PNG_ROWBYTES() and friends

+    to png_size_t (Cosmin).

+  Removed png_convert_size() and replaced png_sizeof with sizeof (Cosmin).

+  Removed some unnecessary type casts (Cosmin).

+  Changed prototype of png_get_compression_buffer_size() and

+    png_set_compression_buffer_size() to work with png_size_t instead of

+    png_uint_32 (Cosmin).

+  Removed png_memcpy_check() and png_memset_check() (Cosmin).

+  Fixed a typo (png_byte --> png_bytep) in libpng.3 and libpng.txt (Cosmin).

+  Clarified that png_zalloc() does not clear the allocated memory,

+    and png_zalloc() and png_zfree() cannot be PNGAPI (Cosmin).

+  Renamed png_mem_size_t to png_alloc_size_t, fixed its definition in

+    pngconf.h, and used it in all memory allocation functions (Cosmin).

+  Renamed pngintrn.h to pngpriv.h, added a comment at the top of the file

+    mentioning that the symbols declared in that file are private, and

+    updated the scripts and the Visual C++ projects accordingly (Cosmin).

+  Removed circular references between pngconf.h and pngconf.h.in in

+    scripts/makefile.vc*win32 (Cosmin).

+  Removing trailing '.' from the warning and error messages (Cosmin).

+  Added pngdefs.h that is built by makefile or configure, instead of

+    pngconf.h.in (Glenn).

+  Detect and fix attempt to write wrong iCCP profile length.

+

+Version 1.4.0beta12 [October 19, 2006]

+  Changed "logical" to "bitwise" in the documentation.

+  Work around Intel-Mac compiler bug by setting PNG_NO_MMX_CODE in pngconf.h

+  Add a typecast to stifle compiler warning in pngrutil.c

+

+Version 1.4.0beta13 [November 10, 2006]

+  Fix potential buffer overflow in sPLT chunk handler.

+  Fix Makefile.am to not try to link to noexistent files.

+

+Version 1.4.0beta14 [November 15, 2006]

+  Check all exported functions for NULL png_ptr.

+

+Version 1.4.0beta15 [November 17, 2006]

+  Relocated two misplaced tests for NULL png_ptr.

+  Built Makefile.in with automake-1.9.6 instead of 1.9.2.

+  Build configure with autoconf-2.60 instead of 2.59

+  Add "install: all" in Makefile.am so "configure; make install" will work.

+

+Version 1.4.0beta16 [November 17, 2006]

+  Added a typecast in png_zalloc().

+

+Version 1.4.0beta17 [December 4, 2006]

+  Changed "new_key[79] = '\0';" to "(*new_key)[79] = '\0';" in pngwutil.c

+  Add "png_bytep" typecast to profile while calculating length in pngwutil.c

+

+Version 1.4.0beta18 [December 7, 2006]

+  Added scripts/CMakeLists.txt

+

+Version 1.4.0beta19 [May 16, 2007]

+  Revised scripts/CMakeLists.txt

+  Rebuilt configure and Makefile.in with newer tools.

+  Added conditional #undef jmpbuf in pngtest.c to undo #define in AIX headers.

+  Added scripts/makefile.nommx

+

+Version 1.4.0beta20 [July 9, 2008]

+  Moved several PNG_HAVE_* macros from pngpriv.h to png.h because applications

+    calling set_unknown_chunk_location() need them.

+  Moved several macro definitions from pngpriv.h to pngconf.h

+  Merge with changes to the 1.2.X branch, as of 1.2.30beta04.

+  Deleted all use of the MMX assembler code and Intel-licensed optimizations.

+  Revised makefile.mingw

+

+Version 1.4.0beta21 [July 21, 2008]

+  Moved local array "chunkdata" from pngrutil.c to the png_struct, so

+    it will be freed by png_read_destroy() in case of a read error (Kurt

+    Christensen).

+

+Version 1.4.0beta22 [July 21, 2008]

+  Change "purpose" and "buffer" to png_ptr->chunkdata to avoid memory leaking.

+

+Version 1.4.0beta23 [July 22, 2008]

+  Change "chunkdata = NULL" to "png_ptr->chunkdata = NULL" several places in

+    png_decompress_chunk().

+

+Version 1.4.0beta24 [July 25, 2008]

+  Change all remaining "chunkdata" to "png_ptr->chunkdata" in

+    png_decompress_chunk(), and remove "chunkdata" from parameter list.

+  Put a call to png_check_chunk_name() in png_read_chunk_header().

+  Revised png_check_chunk_name() to reject a name with a lowercase 3rd byte.

+  Removed two calls to png_check_chunk_name() occuring later in the process.

+  Define PNG_NO_ERROR_NUMBERS by default in pngconf.h

+

+Version 1.4.0beta25 [July 30, 2008]

+  Added a call to png_check_chunk_name() in pngpread.c

+  Reverted png_check_chunk_name() to accept a name with a lowercase 3rd byte.

+  Added png_push_have_buffer() function to pngpread.c

+  Eliminated PNG_BIG_ENDIAN_SUPPORTED and associated png_get_* macros.

+  Made inline expansion of png_get_*() optional with PNG_USE_READ_MACROS.

+  Eliminated all PNG_USELESS_TESTS and PNG_CORRECT_PALETTE_SUPPORTED code.

+  Synced contrib directory and configure files with libpng-1.2.30beta06.

+  Eliminated no-longer-used pngdefs.h (but it's still built in the makefiles)

+  Relocated a misplaced "#endif /* PNG_NO_WRITE_FILTER */" in pngwutil.c

+

+Version 1.4.0beta26 [August 4, 2008]

+  Removed png_push_have_buffer() function in pngpread.c.  It increased the

+    compiled library size slightly.

+  Changed "-Wall" to "-W -Wall" in the CFLAGS in all makefiles (Cosmin Truta)

+  Declared png_ptr "volatile" in pngread.c and pngwrite.c to avoid warnings.

+  Updated contrib/visupng/cexcept.h to version 2.0.1

+  Added PNG_LITERAL_CHARACTER macros for #, [, and ].

+

+Version 1.4.0beta27 [August 5, 2008]

+  Revised usage of PNG_LITERAL_SHARP in pngerror.c.

+  Moved newline character from individual png_debug messages into the

+    png_debug macros.

+  Allow user to #define their own png_debug, png_debug1, and png_debug2.

+

+Version 1.4.0beta28 [August 5, 2008]

+  Revised usage of PNG_LITERAL_SHARP in pngerror.c.

+  Added PNG_STRING_NEWLINE macro

+

+Version 1.4.0beta29 [August 9, 2008]

+  Revised usage of PNG_STRING_NEWLINE to work on non-ISO compilers.

+  Added PNG_STRING_COPYRIGHT macro.

+  Added non-ISO versions of png_debug macros.

+

+Version 1.4.0beta30 [August 14, 2008]

+  Added premultiplied alpha feature (Volker Wiendl).

+

+Version 1.4.0beta31 [August 18, 2008]

+  Moved png_set_premultiply_alpha from pngtrans.c to pngrtran.c

+  Removed extra crc check at the end of png_handle_cHRM().  Bug introduced

+    in libpng-1.4.0beta20.

+

+Version 1.4.0beta32 [August 19, 2008]

+  Added PNG_WRITE_FLUSH_SUPPORTED block around new png_flush() call.

+  Revised PNG_NO_STDIO version of png_write_flush()

+

+Version 1.4.0beta33 [August 20, 2008]

+  Added png_get|set_chunk_cache_max() to limit the total number of sPLT,

+    text, and unknown chunks that can be stored.

+

+Version 1.4.0beta34 [September 6, 2008]

+  Shortened tIME_string to 29 bytes in pngtest.c

+  Fixed off-by-one error introduced in png_push_read_zTXt() function in

+    libpng-1.2.30beta04/pngpread.c (Harald van Dijk)

+

+Version 1.4.0beta35 [October 6, 2008]

+  Changed "trans_values" to "trans_color".

+  Changed so-number from 0 to 14.  Some OS do not like 0.

+  Revised makefile.darwin to fix shared library numbering.

+  Change png_set_gray_1_2_4_to_8() to png_set_expand_gray_1_2_4_to_8()

+    in example.c (debian bug report)

+

+Version 1.4.0beta36 [October 25, 2008]

+  Sync with tEXt vulnerability fix in libpng-1.2.33rc02.

+

+Version 1.4.0beta37 [November 13, 2008]

+  Added png_check_cHRM in png.c and moved checking from pngget.c, pngrutil.c,

+    and pngwrite.c

+

+Version 1.4.0beta38 [November 22, 2008]

+  Added check for zero-area RGB cHRM triangle in png_check_cHRM() and

+    png_check_cHRM_fixed().

+

+Version 1.4.0beta39 [November 23, 2008]

+  Revised png_warning() to write its message on standard output by default

+    when warning_fn is NULL.

+

+Version 1.4.0beta40 [November 24, 2008]

+  Eliminated png_check_cHRM().  Instead, always use png_check_cHRM_fixed().

+  In png_check_cHRM_fixed(), ensure white_y is > 0, and removed redundant

+    check for all-zero coordinates that is detected by the triangle check.

+

+Version 1.4.0beta41 [November 26, 2008]

+  Fixed string vs pointer-to-string error in png_check_keyword().

+  Rearranged test expressions in png_check_cHRM_fixed() to avoid internal

+    overflows.

+  Added PNG_NO_CHECK_cHRM conditional.

+

+Version 1.4.0beta42, 43 [December 1, 2008]

+  Merge png_debug with version 1.2.34beta04.

+

+Version 1.4.0beta44 [December 6, 2008]

+  Removed redundant check for key==NULL before calling png_check_keyword()

+    to ensure that new_key gets initialized and removed extra warning

+    (Merge with version 1.2.34beta05 -- Arvan Pritchard).

+

+Version 1.4.0beta45 [December 9, 2008]

+  In png_write_png(), respect the placement of the filler bytes in an earlier

+    call to png_set_filler() (Jim Barry).

+

+Version 1.4.0beta46 [December 10, 2008]

+  Undid previous change and added PNG_TRANSFORM_STRIP_FILLER_BEFORE and

+    PNG_TRANSFORM_STRIP_FILLER_AFTER conditionals and deprecated

+    PNG_TRANSFORM_STRIP_FILLER (Jim Barry).

+

+Version 1.4.0beta47 [December 15, 2008]

+  Support for dithering was disabled by default, because it has never

+    been well tested and doesn't work very well.  The code has not

+    been removed, however, and can be enabled by building libpng with

+    PNG_READ_DITHER_SUPPORTED defined.

+

+Version 1.4.0beta48 [February 14, 2009]

+  Added new exported function png_calloc().

+  Combined several instances of png_malloc(); png_memset() into png_calloc().

+  Removed prototype for png_freeptr() that was added in libpng-1.4.0beta24

+    but was never defined.

+

+Version 1.4.0beta49 [February 28, 2009]

+  Added png_fileno() macro to pngconf.h, used in pngwio.c

+  Corrected order of #ifdef's in png_debug definition in png.h

+  Fixed bug introduced in libpng-1.4.0beta48 with the memset arguments

+    for pcal_params.

+  Fixed order of #ifdef directives in the png_debug defines in png.h

+    (bug introduced in libpng-1.2.34/1.4.0beta29).

+  Revised comments in png_set_read_fn() and png_set_write_fn().

+

+Version 1.4.0beta50 [March 18, 2009]

+  Use png_calloc() instead of png_malloc() to allocate big_row_buf when

+    reading an interlaced file, to avoid a possible UMR.

+  Undid revision of PNG_NO_STDIO version of png_write_flush().  Users

+    having trouble with fflush() can build with PNG_NO_WRITE_FLUSH defined

+    or supply their own flush_fn() replacement.

+  Revised libpng*.txt and png.h documentation about use of png_write_flush()

+    and png_set_write_fn().

+  Removed fflush() from pngtest.c.

+  Added "#define PNG_NO_WRITE_FLUSH" to contrib/pngminim/encoder/pngusr.h

+

+Version 1.4.0beta51 [March 21, 2009]

+  Removed new png_fileno() macro from pngconf.h .

+

+Version 1.4.0beta52 [March 27, 2009]

+  Relocated png_do_chop() ahead of building gamma tables in pngrtran.c

+    This avoids building 16-bit gamma tables unnecessarily.

+  Removed fflush() from pngtest.c.

+  Added "#define PNG_NO_WRITE_FLUSH" to contrib/pngminim/encoder/pngusr.h

+  Added a section on differences between 1.0.x and 1.2.x to libpng.3/libpng.txt

+

+Version 1.4.0beta53 [April 1, 2009]

+  Removed some remaining MMX macros from pngpriv.h

+  Fixed potential memory leak of "new_name" in png_write_iCCP() (Ralph Giles)

+

+Version 1.4.0beta54 [April 13, 2009]

+  Added "ifndef PNG_SKIP_SETJMP_CHECK" block in pngconf.h to allow

+    application code writers to bypass the check for multiple inclusion

+    of setjmp.h when they know that it is safe to ignore the situation.

+  Eliminated internal use of setjmp() in pngread.c and pngwrite.c

+  Reordered ancillary chunks in pngtest.png to be the same as what

+    pngtest now produces, and made some cosmetic changes to pngtest output.

+  Eliminated deprecated png_read_init_3() and png_write_init_3() functions.

+

+Version 1.4.0beta55 [April 15, 2009]

+  Simplified error handling in pngread.c and pngwrite.c by putting

+    the new png_read_cleanup() and png_write_cleanup() functions inline.

+

+Version 1.4.0beta56 [April 25, 2009]

+  Renamed "user_chunk_data" to "my_user_chunk_data" in pngtest.c to suppress

+    "shadowed declaration" warning from gcc-4.3.3.

+  Renamed "gamma" to "png_gamma" in pngset.c to avoid "shadowed declaration"

+    warning about a global "gamma" variable in math.h on some platforms.

+

+Version 1.4.0beta57 [May 2, 2009]

+  Removed prototype for png_freeptr() that was added in libpng-1.4.0beta24

+    but was never defined (again).

+  Rebuilt configure scripts with autoconf-2.63 instead of 2.62

+  Removed pngprefs.h and MMX from makefiles

+

+Version 1.4.0beta58 [May 14, 2009]

+  Changed pngw32.def to pngwin.def in makefile.mingw (typo was introduced

+    in beta57).

+  Clarified usage of sig_bit versus sig_bit_p in example.c (Vincent Torri)

+

+Version 1.4.0beta59 [May 15, 2009]

+  Reformated sources in libpng style (3-space intentation, comment format)

+  Fixed typo in libpng docs (PNG_FILTER_AVE should be PNG_FILTER_AVG)

+  Added sections about the git repository and our coding style to the

+    documentation

+  Relocated misplaced #endif in pngwrite.c, sCAL chunk handler.

+

+Version 1.4.0beta60 [May 19, 2009]

+  Conditionally compile png_read_finish_row() which is not used by

+    progressive readers.

+  Added contrib/pngminim/preader to demonstrate building minimal progressive

+    decoder, based on contrib/gregbook with embedded libpng and zlib.

+

+Version 1.4.0beta61 [May 20, 2009]

+  In contrib/pngminim/*, renamed "makefile.std" to "makefile", since there

+    is only one makefile in those directories, and revised the README files

+    accordingly.

+  More reformatting of comments, mostly to capitalize sentences.

+

+Version 1.4.0beta62 [June 2, 2009]

+  Added "#define PNG_NO_WRITE_SWAP" to contrib/pngminim/encoder/pngusr.h

+    and "define PNG_NO_READ_SWAP" to decoder/pngusr.h and preader/pngusr.h

+  Reformatted several remaining "else statement" into two lines.

+  Added a section to the libpng documentation about using png_get_io_ptr()

+    in configure scripts to detect the presence of libpng.

+

+Version 1.4.0beta63 [June 15, 2009]

+  Revised libpng*.txt and libpng.3 to mention calling png_set_IHDR()

+    multiple times and to specify the sample order in the tRNS chunk,

+    because the ISO PNG specification has a typo in the tRNS table.

+  Changed several PNG_UNKNOWN_CHUNK_SUPPORTED to

+    PNG_HANDLE_AS_UNKNOWN_SUPPORTED, to make the png_set_keep mechanism

+    available for ignoring known chunks even when not saving unknown chunks.

+  Adopted preference for consistent use of "#ifdef" and "#ifndef" versus

+    "#if defined()" and "if !defined()" where possible.

+

+Version 1.4.0beta64 [June 24, 2009]

+  Eliminated PNG_LEGACY_SUPPORTED code.

+  Moved the various unknown chunk macro definitions outside of the

+     PNG_READ|WRITE_ANCILLARY_CHUNK_SUPPORTED blocks.

+

+Version 1.4.0beta65 [June 26, 2009]

+  Added a reference to the libpng license in each file.

+

+Version 1.4.0beta66 [June 27, 2009]

+  Refer to the libpng license instead of the libpng license in each file.

+

+Version 1.4.0beta67 [July 6, 2009]

+  Relocated INVERT_ALPHA within png_read_png() and png_write_png().

+  Added high-level API transform PNG_TRANSFORM_GRAY_TO_RGB.

+  Added an "xcode" project to the projects directory (Alam Arias).

+

+Version 1.4.0beta68 [July 19, 2009]

+  Avoid some tests in filter selection in pngwutil.c

+

+Version 1.4.0beta69 [July 25, 2009]

+  Simplified the new filter-selection test.  This runs faster in the

+    common "PNG_ALL_FILTERS" and PNG_FILTER_NONE cases.

+  Removed extraneous declaration from the new call to png_read_gray_to_rgb()

+    (bug introduced in libpng-1.4.0beta67).

+  Fixed up xcode project (Alam Arias)

+  Added a prototype for png_64bit_product() in png.c

+

+Version 1.4.0beta70 [July 27, 2009]

+  Avoid a possible NULL dereference in debug build, in png_set_text_2().

+    (bug introduced in libpng-0.95, discovered by Evan Rouault)

+

+Version 1.4.0beta71 [July 29, 2009]

+  Rebuilt configure scripts with autoconf-2.64.

+

+Version 1.4.0beta72 [August 1, 2009]

+  Replaced *.tar.lzma with *.tar.xz in distribution.  Get the xz codec

+    from <http://tukaani.org/xz>.

+

+Version 1.4.0beta73 [August 1, 2009]

+  Reject attempt to write iCCP chunk with negative embedded profile length

+    (JD Chen) (CVE-2009-5063).

+

+Version 1.4.0beta74 [August 8, 2009]

+  Changed png_ptr and info_ptr member "trans" to "trans_alpha".

+

+Version 1.4.0beta75 [August 21, 2009]

+  Removed an extra png_debug() recently added to png_write_find_filter().

+  Fixed incorrect #ifdef in pngset.c regarding unknown chunk support.

+

+Version 1.4.0beta76 [August 22, 2009]

+  Moved an incorrectly located test in png_read_row() in pngread.c

+

+Version 1.4.0beta77 [August 27, 2009]

+  Removed lpXYZ.tar.bz2 (with CRLF), KNOWNBUG, libpng-x.y.z-KNOWNBUG.txt,

+    and the "noconfig" files from the distribution.

+  Moved CMakeLists.txt from scripts into the main libpng directory.

+  Various bugfixes and improvements to CMakeLists.txt (Philip Lowman)

+

+Version 1.4.0beta78 [August 31, 2009]

+  Converted all PNG_NO_* tests to PNG_*_SUPPORTED everywhere except pngconf.h

+  Eliminated PNG_NO_FREE_ME and PNG_FREE_ME_SUPPORTED macros.

+  Use png_malloc plus a loop instead of png_calloc() to initialize

+    row_pointers in png_read_png().

+

+Version 1.4.0beta79 [September 1, 2009]

+  Eliminated PNG_GLOBAL_ARRAYS and PNG_LOCAL_ARRAYS; always use local arrays.

+  Eliminated PNG_CALLOC_SUPPORTED macro and always provide png_calloc().

+

+Version 1.4.0beta80 [September 17, 2009]

+  Removed scripts/libpng.icc

+  Changed typecast of filler from png_byte to png_uint_16 in png_set_filler().

+    (Dennis Gustafsson)

+  Fixed typo introduced in beta78 in pngtest.c ("#if def " should be "#ifdef ")

+

+Version 1.4.0beta81 [September 23, 2009]

+  Eliminated unused PNG_FLAG_FREE_* defines from pngpriv.h

+  Expanded TAB characters in pngrtran.c

+  Removed PNG_CONST from all "PNG_CONST PNG_CHNK" declarations to avoid

+    compiler complaints about doubly declaring things "const".

+  Changed all "#if [!]defined(X)" to "if[n]def X" where possible.

+  Eliminated unused png_ptr->row_buf_size

+

+Version 1.4.0beta82 [September 25, 2009]

+  Moved redundant IHDR checking into new png_check_IHDR() in png.c

+    and report all errors found in the IHDR data.

+  Eliminated useless call to png_check_cHRM() from pngset.c

+

+Version 1.4.0beta83 [September 25, 2009]

+  Revised png_check_IHDR() to eliminate bogus complaint about filter_type.

+

+Version 1.4.0beta84 [September 30, 2009]

+  Fixed some inconsistent indentation in pngconf.h

+  Revised png_check_IHDR() to add a test for width variable less than 32-bit.

+

+Version 1.4.0beta85 [October 1, 2009]

+  Revised png_check_IHDR() again, to check info_ptr members instead of

+    the contents of the returned parameters.

+

+Version 1.4.0beta86 [October 9, 2009]

+  Updated the "xcode" project (Alam Arias).

+  Eliminated a shadowed declaration of "pp" in png_handle_sPLT().

+

+Version 1.4.0rc01 [October 19, 2009]

+  Trivial cosmetic changes.

+

+Version 1.4.0beta87 [October 30, 2009]

+  Moved version 1.4.0 back into beta.

+

+Version 1.4.0beta88 [October 30, 2009]

+  Revised libpng*.txt section about differences between 1.2.x and 1.4.0

+    because most of the new features have now been ported back to 1.2.41

+

+Version 1.4.0beta89 [November 1, 2009]

+  More bugfixes and improvements to CMakeLists.txt (Philip Lowman)

+  Removed a harmless extra png_set_invert_alpha() from pngwrite.c

+  Apply png_user_chunk_cache_max within png_decompress_chunk().

+  Merged libpng-1.2.41.txt with libpng-1.4.0.txt where appropriate.

+

+Version 1.4.0beta90 [November 2, 2009]

+  Removed all remaining WIN32_WCE #ifdefs except those involving the

+    time.h "tm" structure

+

+Version 1.4.0beta91 [November 3, 2009]

+  Updated scripts/pngw32.def and projects/wince/png32ce.def

+  Copied projects/wince/png32ce.def to the scripts directory.

+  Added scripts/makefile.wce

+  Patched ltmain.sh for wince support.

+  Added PNG_CONVERT_tIME_SUPPORTED macro.

+

+Version 1.4.0beta92 [November 4, 2009]

+  Make inclusion of time.h in pngconf.h depend on PNG_CONVERT_tIME_SUPPORTED

+  Make #define PNG_CONVERT_tIME_SUPPORTED depend on PNG_WRITE_tIME_SUPPORTED

+  Revised libpng*.txt to describe differences from 1.2.40 to 1.4.0 (instead

+    of differences from 1.2.41 to 1.4.0)

+

+Version 1.4.0beta93 [November 7, 2009]

+  Added PNG_DEPSTRUCT, PNG_DEPRECATED, PNG_USE_RESULT, PNG_NORETURN, and

+    PNG_ALLOCATED macros to detect deprecated direct access to the

+    png_struct or info_struct members and other deprecated usage in

+    applications (John Bowler).

+  Updated scripts/makefile* to add "-DPNG_CONFIGURE_LIBPNG" to CFLAGS,

+    to prevent warnings about direct access to png structs by libpng

+    functions while building libpng.  They need to be tested, especially

+    those using compilers other than gcc.

+  Updated projects/visualc6 and visualc71 with "/d PNG_CONFIGURE_LIBPNG".

+    They should work but still need to be updated to remove

+    references to pnggccrd.c or pngvcrd.c and ASM building.

+  Added README.txt to the beos, cbuilder5, netware, and xcode projects warning

+    that they need to be updated, to remove references to pnggccrd.c and

+    pngvcrd.c and to depend on pngpriv.h

+  Removed three direct references to read_info_ptr members in pngtest.c

+    that were detected by the new PNG_DEPSTRUCT macro.

+  Moved the png_debug macro definitions and the png_read_destroy(),

+    png_write_destroy() and png_far_to_near() prototypes from png.h

+    to pngpriv.h (John Bowler)

+  Moved the synopsis lines for png_read_destroy(), png_write_destroy()

+    png_debug(), png_debug1(), and png_debug2() from libpng.3 to libpngpf.3.

+

+Version 1.4.0beta94 [November 9, 2009]

+  Removed the obsolete, unused pnggccrd.c and pngvcrd.c files.

+  Updated CMakeLists.txt to add "-DPNG_CONFIGURE_LIBPNG" to the definitions.

+  Removed dependency of pngtest.o on pngpriv.h in the makefiles.

+  Only #define PNG_DEPSTRUCT, etc. in pngconf.h if not already defined.

+

+Version 1.4.0beta95 [November 10, 2009]

+  Changed png_check_sig() to !png_sig_cmp() in contrib programs.

+  Added -DPNG_CONFIGURE_LIBPNG to contrib/pngminm/*/makefile

+  Changed png_check_sig() to !png_sig_cmp() in contrib programs.

+  Corrected the png_get_IHDR() call in contrib/gregbook/readpng2.c

+  Changed pngminim/*/gather.sh to stop trying to remove pnggccrd.c and pngvcrd.c

+  Added dependency on pngpriv.h in contrib/pngminim/*/makefile

+

+Version 1.4.0beta96 [November 12, 2009]

+  Renamed scripts/makefile.wce to scripts/makefile.cegcc

+  Revised Makefile.am to use libpng.sys while building libpng.so

+    so that only PNG_EXPORT functions are exported.

+  Removed the deprecated png_check_sig() function/macro.

+  Removed recently removed function names from scripts/*.def

+  Revised pngtest.png to put chunks in the same order written by pngtest

+    (evidently the same change made in libpng-1.0beta54 was lost).

+  Added PNG_PRIVATE macro definition in pngconf.h for possible future use.

+

+Version 1.4.0beta97 [November 13, 2009]

+  Restored pngtest.png to the libpng-1.4.0beta7 version.

+  Removed projects/beos and netware.txt; no one seems to be supporting them.

+  Revised Makefile.in

+

+Version 1.4.0beta98 [November 13, 2009]

+  Added the "xcode" project to zip distributions,

+  Fixed a typo in scripts/pngwin.def introduced in beta97.

+

+Version 1.4.0beta99 [November 14, 2009]

+  Moved libpng-config.in and libpng.pc-configure.in out of the scripts

+    directory, to libpng-config.in and libpng-pc.in, respectively, and

+    modified Makefile.am and configure.ac accordingly.  Now "configure"

+    needs nothing from the "scripts" directory.

+  Avoid redefining PNG_CONST in pngconf.h

+

+Version 1.4.0beta100 [November 14, 2009]

+  Removed ASM builds from projects/visualc6 and projects/visualc71

+  Removed scripts/makefile.nommx and makefile.vcawin32

+  Revised CMakeLists.txt to account for new location of libpng-config.in

+    and libpng-pc.in

+  Updated INSTALL to reflect removal and relocation of files.

+

+Version 1.4.0beta101 [November 14, 2009]

+  Restored the binary files (*.jpg, *.png, some project files) that were

+    accidentally deleted from the zip and 7z distributions when the xcode

+    project was added.

+

+Version 1.4.0beta102 [November 18, 2009]

+  Added libpng-config.in and libpng-pc.in to the zip and 7z distributions.

+  Fixed a typo in projects/visualc6/pngtest.dsp, introduced in beta100.

+  Moved descriptions of makefiles and other scripts out of INSTALL into

+    scripts/README.txt

+  Updated the copyright year in scripts/pngwin.rc from 2006 to 2009.

+

+Version 1.4.0beta103 [November 21, 2009]

+  Removed obsolete comments about ASM from projects/visualc71/README_zlib.txt

+  Align row_buf on 16-byte boundary in memory.

+  Restored the PNG_WRITE_FLUSH_AFTER_IEND_SUPPORTED guard around the call

+    to png_flush() after png_write_IEND().  See 1.4.0beta32, 1.4.0beta50

+    changes above and 1.2.30, 1.2.30rc01 and rc03 in 1.2.41 CHANGES.  Someone

+    needs this feature.

+  Make the 'png_jmpbuf' macro expand to a call that records the correct

+    longjmp function as well as returning a pointer to the setjmp

+    jmp_buf buffer, and marked direct access to jmpbuf 'deprecated'.

+    (John Bowler)

+

+Version 1.4.0beta104 [November 22, 2009]

+  Removed png_longjmp_ptr from scripts/*.def and libpng.3

+  Rebuilt configure scripts with autoconf-2.65

+

+Version 1.4.0beta105 [November 25, 2009]

+  Use fast integer PNG_DIVIDE_BY_255() or PNG_DIVIDE_BY_65535()

+    to accomplish alpha premultiplication when

+    PNG_READ_COMPOSITE_NODIV_SUPPORTED is defined.

+  Changed "/255" to "/255.0" in background calculations to make it clear

+    that the 255 is used as a double.

+

+Version 1.4.0beta106 [November 27, 2009]

+  Removed premultiplied alpha feature.

+

+Version 1.4.0beta107 [December 4, 2009]

+  Updated README

+  Added "#define PNG_NO_PEDANTIC_WARNINGS" in the libpng source files.

+  Removed "-DPNG_CONFIGURE_LIBPNG" from the makefiles and projects.

+  Revised scripts/makefile.netbsd, makefile.openbsd, and makefile.sco

+    to put png.h and pngconf.h in $prefix/include, like the other scripts,

+    instead of in $prefix/include/libpng.  Also revised makefile.sco

+    to put them in $prefix/include/libpng15 instead of in

+    $prefix/include/libpng/libpng15.

+

+Version 1.4.0beta108 [December 11, 2009]

+  Removed leftover "-DPNG_CONFIGURE_LIBPNG" from contrib/pngminim/*/makefile

+  Relocated png_do_chop() to its original position in pngrtran.c; the

+    change in version 1.2.41beta08 caused transparency to be handled wrong

+    in some 16-bit datastreams (Yusaku Sugai).

+

+Version 1.4.0beta109 [December 13, 2009]

+  Added "bit_depth" parameter to the private png_build_gamma_table() function.

+  Pass bit_depth=8 to png_build_gamma_table() when bit_depth is 16 but the

+    PNG_16_TO_8 transform has been set, to avoid unnecessary build of 16-bit

+    tables.

+

+Version 1.4.0rc02 [December 20, 2009]

+  Declared png_cleanup_needed "volatile" in pngread.c and pngwrite.c

+

+Version 1.4.0rc03 [December 22, 2009]

+  Renamed libpng-pc.in back to libpng.pc.in and revised CMakeLists.txt

+    (revising the change in 1.4.0beta99)

+

+Version 1.4.0rc04 [December 25, 2009]

+  Swapped PNG_UNKNOWN_CHUNKS_SUPPORTED and PNG_HANDLE_AS_UNKNOWN_SUPPORTED

+    in pngset.c to be consistent with other changes in version 1.2.38.

+

+Version 1.4.0rc05 [December 25, 2009]

+  Changed "libpng-pc.in" to "libpng.pc.in" in configure.ac, configure, and

+    Makefile.in to be consistent with changes in libpng-1.4.0rc03

+

+Version 1.4.0rc06 [December 29, 2009]

+  Reverted the gamma_table changes from libpng-1.4.0beta109.

+  Fixed some indentation errors.

+

+Version 1.4.0rc07 [January 1, 2010]

+  Revised libpng*.txt and libpng.3 about 1.2.x->1.4.x differences.

+  Use png_calloc() instead of png_malloc(); png_memset() in pngrutil.c

+  Update copyright year to 2010.

+

+Version 1.4.0rc08 [January 2, 2010]

+  Avoid deprecated references to png_ptr-io_ptr and png_ptr->error_ptr

+    in pngtest.c

+

+Version 1.4.0 [January 3, 2010]

+  No changes.

+

+Version 1.4.1beta01 [January 8, 2010]

+  Updated CMakeLists.txt for consistent indentation and to avoid an

+    unclosed if-statement warning (Philip Lowman).

+  Revised Makefile.am and Makefile.in to remove references to Y2KINFO,

+    KNOWNBUG, and libpng.la (Robert Schwebel).

+  Revised the makefiles to install the same files and symbolic

+    links as configure, except for libpng.la and libpng14.la.

+  Make png_set|get_compression_buffer_size() available even when

+    PNG_WRITE_SUPPORTED is not enabled.

+  Revised Makefile.am and Makefile.in to simplify their maintenance.

+  Revised scripts/makefile.linux to install a link to libpng14.so.14.1

+

+Version 1.4.1beta02 [January 9, 2010]

+  Revised the rest of the makefiles to install a link to libpng14.so.14.1

+

+Version 1.4.1beta03 [January 10, 2010]

+  Removed png_set_premultiply_alpha() from scripts/*.def

+

+Version 1.4.1rc01 [January 16, 2010]

+  No changes.

+

+Version 1.4.1beta04 [January 23, 2010]

+  Revised png_decompress_chunk() to improve speed and memory usage when

+    decoding large chunks.

+  Added png_set|get_chunk_malloc_max() functions.

+

+Version 1.4.1beta05 [January 26, 2010]

+  Relocated "int k" declaration in pngtest.c to minimize its scope.

+

+Version 1.4.1beta06 [January 28, 2010]

+  Revised png_decompress_chunk() to use a two-pass method suggested by

+    John Bowler.

+

+Version 1.4.1beta07 [February 6, 2010]

+  Folded some long lines in the source files.

+  Added defineable PNG_USER_CHUNK_CACHE_MAX, PNG_USER_CHUNK_MALLOC_MAX,

+    and a PNG_USER_LIMITS_SUPPORTED flag.

+  Eliminated use of png_ptr->irowbytes and reused the slot in png_ptr as

+    png_ptr->png_user_chunk_malloc_max.

+  Revised png_push_save_buffer() to do fewer but larger png_malloc() calls.

+

+Version 1.4.1beta08 [February 6, 2010]

+  Minor cleanup and updating of dates and copyright year.

+

+Version 1.5.0beta01 [February 7, 2010]

+  Moved declaration of png_struct into private pngstruct.h and png_info

+    into pnginfo.h

+

+Version 1.4.1beta09 and 1.5.0beta02 [February 7, 2010]

+  Reverted to original png_push_save_buffer() code.

+

+Version 1.4.1beta10 and 1.5.0beta03 [February 8, 2010]

+  Return allocated "old_buffer" in png_push_save_buffer() before

+    calling png_error(), to avoid a potential memory leak.

+  Updated configure script to use SO number 15.

+

+Version 1.5.0beta04 [February 9, 2010]

+  Removed malformed "incomplete struct declaration" of png_info from png.h

+

+Version 1.5.0beta05 [February 12, 2010]

+  Removed PNG_DEPSTRUCT markup in pngstruct.h and pnginfo.h, and undid the

+    linewrapping that it entailed.

+  Revised comments in pngstruct.h and pnginfo.h and added pointers to

+    the libpng license.

+  Changed PNG_INTERNAL to PNG_EXPOSE_INTERNAL_STRUCTURES

+  Removed the cbuilder5 project, which has not been updated to 1.4.0.

+

+Version 1.4.1beta12 and 1.5.0beta06 [February 14, 2010]

+  Fixed type declaration of png_get_chunk_malloc_max() in pngget.c (Daisuke

+    Nishikawa)

+

+Version 1.5.0beta07 [omitted]

+

+Version 1.5.0beta08 [February 19, 2010]

+  Changed #ifdef PNG_NO_STDIO_SUPPORTED to #ifdef PNG_NO_CONSOLE_IO_SUPPORTED

+    wherever png_snprintf() is used to construct error and warning messages.

+  Noted in scripts/makefile.mingw that it expects to be run under MSYS.

+  Removed obsolete unused MMX-querying support from contrib/gregbook

+  Added exported png_longjmp() function.

+  Removed the AIX redefinition of jmpbuf in png.h

+  Added -D_ALLSOURCE in configure.ac, makefile.aix, and CMakeLists.txt

+    when building on AIX.

+

+Version 1.5.0beta09 [February 19, 2010]

+  Removed -D_ALLSOURCE from configure.ac, makefile.aix, and CMakeLists.txt.

+  Changed the name of png_ptr->jmpbuf to png_ptr->png_jmpbuf in pngstruct.h

+

+Version 1.5.0beta10 [February 25, 2010]

+  Removed unused gzio.c from contrib/pngminim gather and makefile scripts

+  Removed replacement error handlers from contrib/gregbook.  Because of

+    the new png_longjmp() function they are no longer needed.

+

+Version 1.5.0beta11 [March 6, 2010]

+  Removed checking for already-included setjmp.h from pngconf.h

+  Fixed inconsistent indentations and made numerous cosmetic changes.

+  Revised the "SEE ALSO" style of libpng.3, libpngpf.3, and png.5

+

+Version 1.5.0beta12 [March 9, 2010]

+  Moved "#include png.h" inside pngpriv.h and removed "#include png.h" from

+    the source files, along with "#define PNG_EXPOSE_INTERNAL_STRUCTURES"

+    and "#define PNG_NO_PEDANTIC_WARNINGS" (John Bowler).

+  Created new pngdebug.h and moved debug definitions there.

+

+Version 1.5.0beta13 [March 10, 2010]

+  Protect pngstruct.h, pnginfo.h, and pngdebug.h from being included twice.

+  Revise the "#ifdef" blocks in png_inflate() so it will compile when neither

+    PNG_USER_CHUNK_MALLOC_MAX nor PNG_SET_CHUNK_MALLOC_LIMIT_SUPPORTED

+    is defined.

+  Removed unused png_measure_compressed_chunk() from pngpriv.h and libpngpf.3

+  Moved the 'config.h' support from pngconf.h to pngpriv.h

+  Removed PNGAPI from the png_longjmp_ptr typedef.

+  Eliminated dependence of pngtest.c on the private pngdebug.h file.

+  Make all png_debug macros into *unterminated* statements or

+    expressions (i.e. a trailing ';' must always be added) and correct

+    the format statements in various png_debug messages.

+

+Version 1.5.0beta14 [March 14, 2010]

+  Removed direct access to png_ptr->io_ptr from the Windows code in pngtest.c

+  Revised Makefile.am to account for recent additions and replacements.

+  Corrected CE and OS/2 DEF files (scripts/png*def) for symbols removed and

+    added ordinal numbers to the Windows DEF file and corrected the duplicated

+    ordinal numbers on CE symbols that are commented out.

+  Added back in export symbols that can be present in the Windows build but

+    are disabled by default.

+  PNG_EXPORT changed to include an 'ordinal' field for DEF file generation.

+    PNG_CALLBACK added to make callback definitions uniform.  PNGAPI split

+    into PNGCAPI (base C form), PNGAPI (exports) and PNGCBAPI (callbacks),

+    and appropriate changes made to all files.  Cygwin builds re-hinged to

+    allow procedure call standard changes and to remove the need for the DEF

+    file (fixes build on Cygwin).

+  Enabled 'attribute' warnings that are relevant to library APIs and callbacks.

+  Changed rules for generation of the various symbol files and added a new

+    rule for a DEF file (which is also added to the distribution).

+  Updated the symbol file generation to stop it adding spurious spaces

+    to EOL (coming from preprocessor macro expansion).  Added a facility

+    to join tokens in the output and rewrite *.dfn to use this.

+  Eliminated scripts/*.def in favor of libpng.def; updated projects/visualc71

+    and removed scripts/makefile.cygwin.

+  Made PNG_BUILD_DLL safe: it can be set whenever a DLL is being built.

+  Removed the include of sys/types.h - apparently unnecessary now on the

+    platforms on which it happened (all but Mac OS and RISC OS).

+  Moved the Mac OS test into pngpriv.h (the only place it is used.)

+

+Version 1.5.0beta15 [March 17, 2010]

+  Added symbols.chk target to Makefile.am to validate the symbols in png.h

+    against the new DEF file scripts/symbols.def.

+  Changed the default DEF file back to pngwin.def.

+  Removed makefile.mingw.

+  Eliminated PNG_NO_EXTERN and PNG_ALL_EXTERN

+

+Version 1.5.0beta16 [April 1, 2010]

+  Make png_text_struct independent of PNG_iTXt_SUPPORTED, so that

+    fields are initialized in all configurations.  The READ/WRITE

+    macros (PNG_(READ|WRITE)_iTXt_SUPPORTED) still function as

+    before to disable code to actually read or write iTXt chunks

+    and iTXt_SUPPORTED can be used to detect presence of either

+    read or write support (but it is probably better to check for

+    the one actually required - read or write.)

+  Combined multiple png_warning() calls for a single error.

+  Restored the macro definition of png_check_sig().

+

+Version 1.5.0beta17 [April 17, 2010]

+  Added some "(long)" typecasts to printf calls in png_handle_cHRM().

+  Documented the fact that png_set_dither() was disabled since libpng-1.4.0.

+  Reenabled png_set_dither() but renamed it to png_set_quantize() to reflect

+    more accurately what it actually does.  At the same time, renamed

+    the PNG_DITHER_[RED,GREEN_BLUE]_BITS macros to

+    PNG_QUANTIZE_[RED,GREEN,BLUE]_BITS.

+  Added some "(long)" typecasts to printf calls in png_handle_cHRM().

+  Freeze build-time only configuration in the build.

+    In all prior versions of libpng most configuration options

+    controlled by compiler #defines had to be repeated by the

+    application code that used libpng.  This patch changes this

+    so that compilation options that can only be changed at build

+    time are frozen in the build.  Options that are compiler

+    dependent (and those that are system dependent) are evaluated

+    each time - pngconf.h holds these.  Options that can be changed

+    per-file in the application are in png.h.  Frozen options are

+    in the new installed header file pnglibconf.h (John Bowler)

+  Removed the xcode project because it has not been updated to work

+    with libpng-1.5.0.

+  Removed the ability to include optional pngusr.h

+

+Version 1.5.0beta18 [April 17, 2010]

+  Restored the ability to include optional pngusr.h

+  Moved replacements for png_error() and png_warning() from the

+    contrib/pngminim project to pngerror.c, for use when warnings or

+    errors are disabled via PNG_NO_WARN or PNG_NO_ERROR_TEXT, to avoid

+    storing unneeded error/warning text.

+  Updated contrib/pngminim project to work with the new pnglibconf.h

+  Added some PNG_NO_* defines to contrib/pngminim/*/pngusr.h to save space.

+

+Version 1.5.0beta19 [April 24, 2010]

+  Added PNG_{READ,WRITE}_INT_FUNCTIONS_SUPPORTED.  This allows the functions

+    to read and write ints to be disabled independently of PNG_USE_READ_MACROS,

+    which allows libpng to be built with the functions even though the default

+    is to use the macros - this allows applications to choose at app build

+    time whether or not to use macros (previously impossible because the

+    functions weren't in the default build.)

+  Changed Windows calling convention back to __cdecl for API functions.

+    For Windows/x86 platforms only:

+      __stdcall is no longer needed for Visual Basic, so libpng-1.5.0 uses

+      __cdecl throughout (both API functions and callbacks) on Windows/x86

+      platforms.

+  Replaced visualc6 and visualc71 projects with new vstudio project

+  Relaxed the overly-restrictive permissions of some files.

+

+Version 1.5.0beta20 [April 24, 2010]

+  Relaxed more overly-restrictive permissions of some files.

+

+Version 1.5.0beta21 [April 27, 2010]

+  Removed some unwanted binary bytes and changed CRLF to NEWLINE in the new

+    vstudio project files, and some trivial editing of some files in the

+    scripts directory.

+  Set PNG_NO_READ_BGR, PNG_NO_IO_STATE, and PNG_NO_TIME_RFC1123 in

+    contrib/pngminim/decoder/pngusr.h to make a smaller decoder application.

+

+Version 1.5.0beta22 [April 28, 2010]

+  Fixed dependencies of GET_INT_32 - it does not require READ_INT_FUNCTIONS

+    because it has a macro equivalent.

+  Improved the options.awk script; added an "everything off" option.

+  Revised contrib/pngminim to use the "everything off" option in pngusr.dfa.

+

+Version 1.5.0beta23 [April 29, 2010]

+  Corrected PNG_REMOVED macro to take five arguments.

+    The macro was documented with two arguments (name,ordinal), however

+    the symbol checking .dfn files assumed five arguments.  The five

+    argument form seems more useful so it is changed to that.

+  Corrected PNG_UNKNOWN_CHUNKS_SUPPORTED to PNG_HANDLE_AS_UNKNOWN_SUPPORTED

+    in gregbook/readpng2.c

+  Corrected protection of png_get_user_transform_ptr. The API declaration in

+    png.h is removed if both READ and WRITE USER_TRANSFORM are turned off

+    but was left defined in pngtrans.c

+  Added logunsupported=1 to cause pnglibconf.h to document disabled options.

+    This makes the installed pnglibconf.h more readable but causes no

+    other change.  The intention is that users of libpng will find it

+    easier to understand if an API they need is missing.

+  Include png_reset_zstream() in png.c only when PNG_READ_SUPPORTED is defined.

+  Removed dummy_inflate.c from contrib/pngminim/encoder

+  Removed contrib/pngminim/*/gather.sh; gathering is now done in the makefile.

+

+Version 1.5.0beta24 [May 7, 2010]

+  Use bitwise "&" instead of arithmetic mod in pngrutil.c calculation of the

+    offset of the png_ptr->rowbuf pointer into png_ptr->big_row_buf.

+  Added more blank lines for readability.

+

+Version 1.5.0beta25 [June 18, 2010]

+  In pngpread.c: png_push_have_row() add check for new_row > height

+  Removed the now-redundant check for out-of-bounds new_row from example.c

+

+Version 1.5.0beta26 [June 18, 2010]

+  In pngpread.c: png_push_process_row() add check for too many rows.

+

+Version 1.5.0beta27 [June 18, 2010]

+  Removed the check added in beta25 as it is now redundant.

+

+Version 1.5.0beta28 [June 20, 2010]

+  Rewrote png_process_IDAT_data to consistently treat extra data as warnings

+    and handle end conditions more cleanly.

+  Removed the new (beta26) check in png_push_process_row().

+

+Version 1.5.0beta29 [June 21, 2010]

+  Revised scripts/options.awk to work on Sunos (but still doesn't work)

+  Added comment to options.awk and contrib/pngminim/*/makefile to try nawk.

+

+Version 1.5.0beta30 [June 22, 2010]

+  Stop memory leak when reading a malformed sCAL chunk.

+

+Version 1.5.0beta31 [June 26, 2010]

+  Revised pngpread.c patch of beta28 to avoid an endless loop.

+  Removed some trailing blanks.

+

+Version 1.5.0beta32 [June 26, 2010]

+  Removed leftover scripts/options.patch and scripts/options.rej

+

+Version 1.5.0beta33 [July 6, 3010]

+  Made FIXED and FLOATING options consistent in the APIs they enable and

+    disable.  Corrected scripts/options.awk to handle both command line

+    options and options specified in the .dfa files.

+  Changed char *msg to PNG_CONST char *msg in pngrutil.c

+  Make png_set_sRGB_gAMA_and_cHRM set values using either the fixed or

+    floating point APIs, but not both.

+  Reversed patch to remove error handler when the jmp_buf is stored in the

+    main program structure, not the png_struct.

+    The error handler is needed because the default handler in libpng will

+    always use the jmp_buf in the library control structure; this is never

+    set.  The gregbook code is a useful example because, even though it

+    uses setjmp/longjmp, it shows how error handling can be implemented

+    using control mechanisms not directly supported by libpng.  The

+    technique will work correctly with mechanisms such as Microsoft

+    Structure Exceptions or C++ exceptions (compiler willing - note that gcc

+    does not by default support interworking of C and C++ error handling.)

+  Reverted changes to call png_longjmp in contrib/gregbook where it is not

+    appropriate.  If mainprog->jmpbuf is used by setjmp, then png_longjmp

+    cannot be used.

+  Changed "extern PNG_EXPORT" to "PNG_EXPORT" in png.h (Jan Nijtmans)

+  Changed "extern" to "PNG_EXTERN" in pngpriv.h (except for the 'extern "C" {')

+

+Version 1.5.0beta34 [July 12, 2010]

+  Put #ifndef PNG_EXTERN, #endif around the define PNG_EXTERN in pngpriv.h

+

+Version 1.5.0beta35 [July 24, 2010]

+  Removed some newly-added TAB characters.

+  Added -DNO_PNG_SNPRINTF to CFLAGS in scripts/makefile.dj2

+  Moved the definition of png_snprintf() outside of the enclosing

+    #ifdef blocks in pngconf.h

+

+Version 1.5.0beta36 [July 29, 2010]

+  Patches by John Bowler:

+  Fixed point APIs are now supported throughout (no missing APIs).

+  Internal fixed point arithmetic support exists for all internal floating

+    point operations.

+  sCAL validates the floating point strings it is passed.

+  Safe, albeit rudimentary, Watcom support is provided by PNG_API_RULE==2

+  Two new APIs exist to get the number of passes without turning on the

+    PNG_INTERLACE transform and to get the number of rows in the current

+    pass.

+  A new test program, pngvalid.c, validates the gamma code.

+  Errors in the 16-bit gamma correction (overflows) have been corrected.

+  cHRM chunk testing is done consistently (previously the floating point

+    API bypassed it, because the test really didn't work on FP, now the test

+    is performed on the actual values to be stored in the PNG file so it

+    works in the FP case too.)

+  Most floating point APIs now simply call the fixed point APIs after

+    converting the values to the fixed point form used in the PNG file.

+  The standard headers no longer include zlib.h, which is currently only

+    required for pngstruct.h and can therefore be internal.

+  Revised png_get_int_32 to undo the PNG two's complement representation of

+    negative numbers.

+

+Version 1.5.0beta37 [July 30, 2010]

+  Added a typecast in png_get_int_32() in png.h and pngrutil.h to avoid

+    a compiler warning.

+  Replaced oFFs 0,0 with oFFs -10,20 in pngtest.png

+

+Version 1.5.0beta38 [July 31, 2010]

+  Implemented remaining "_fixed" functions.

+  Corrected a number of recently introduced warnings mostly resulting from

+    safe but uncast assignments to shorter integers.  Also added a zlib

+    VStudio release library project because the latest zlib Official Windows

+    build does not include such a thing.

+  Revised png_get_int_16() to be similar to png_get_int_32().

+  Restored projects/visualc71.

+

+Version 1.5.0beta39 [August 2, 2010]

+  VisualC/GCC warning fixes, VisualC build fixes

+  The changes include support for function attributes in VC in addition to

+    those already present in GCC - necessary because without these some

+    warnings are unavoidable.  Fixes include signed/unsigned fixes in

+    pngvalid and checks with gcc -Wall -Wextra -Wunused.

+  VC requires function attributes on function definitions as well as

+    declarations, PNG_FUNCTION has been added to enable this and the

+    relevant function definitions changed.

+

+Version 1.5.0beta40 [August 6, 2010]

+  Correct use of _WINDOWS_ in pngconf.h

+  Removed png_mem_ #defines; they are no longer used.

+  Added the sRGB chunk to pngtest.png

+

+Version 1.5.0beta41 [August 11, 2010]

+  Added the cHRM chunk to pngtest.png

+  Don't try to use version-script with cygwin/mingw.

+  Revised contrib/gregbook to work under cygwin/mingw.

+

+Version 1.5.0beta42 [August 18, 2010]

+  Add .dll.a to the list of extensions to be symlinked by Makefile.am (Yaakov)

+  Made all API functions that have const arguments and constant string

+    literal pointers declare them (John Bowler).

+

+Version 1.5.0beta43 [August 20, 2010]

+  Removed spurious tabs, shorten long lines (no source change)

+    Also added scripts/chkfmt to validate the format of all the files that can

+    reasonably be validated (it is suggested to run "make distclean" before

+    checking, because some machine generated files have long lines.)

+  Reformatted the CHANGES file to be more consistent throughout.

+  Made changes to address various issues identified by GCC, mostly

+    signed/unsigned and shortening problems on assignment but also a few

+    difficult to optimize (for GCC) loops.

+  Fixed non-GCC fixed point builds.  In png.c a declaration was misplaced

+    in an earlier update.  Fixed to declare the auto variables at the head.

+  Use cexcept.h in pngvalid.c.

+

+Version 1.5.0beta44 [August 24, 2010]

+  Updated CMakeLists.txt to use CMAKE_INSTALL_LIBDIR variable; useful for

+    installing libpng in /usr/lib64 (Funda Wang).

+  Revised CMakeLists.txt to put the man pages in share/man/man* not man/man*

+  Revised CMakeLists.txt to make symlinks instead of copies when installing.

+  Changed PNG_LIB_NAME from pngNN to libpngNN in CMakeLists.txt (Philip Lowman)

+  Implemented memory checks within pngvalid

+  Reformatted/rearranged pngvalid.c to assist use of progressive reader.

+  Check interlaced images in pngvalid

+  Clarified pngusr.h comments in pnglibconf.dfa

+  Simplified the pngvalid error-handling code now that cexcept.h is in place.

+  Implemented progressive reader in pngvalid.c for standard tests

+  Implemented progressive read in pngvalid.c gamma tests

+  Turn on progressive reader in pngvalid.c by default and tidy code.

+

+Version 1.5.0beta45 [August 26, 2010]

+  Added an explicit make step to projects/vstudio for pnglibconf.h

+    Also corrected zlib.vcxproj into which Visual Studio had introduced

+    what it calls an "authoring error".  The change to make pnglibconf.h

+    simply copies the file; in the future it may actually generate the

+    file from scripts/pnglibconf.dfa as the other build systems do.

+  Changed pngvalid to work when floating point APIs are disabled

+  Renamed the prebuilt scripts/pnglibconf.h to scripts/pnglibconf.h.prebuilt

+  Supply default values for PNG_USER_PRIVATEBUILD and PNG_USER_DLLFNAME_POSTFIX

+    in pngpriv.h in case the user neglected to define them in their pngusr.h

+

+Version 1.5.0beta46 [August 28, 2010]

+  Added new private header files to libpng_sources in CMakeLists.txt

+  Added PNG_READ_16BIT, PNG_WRITE_16BIT, and PNG_16BIT options.

+  Added reference to scripts/pnglibconf.h.prebuilt in the visualc71 project.

+

+Version 1.5.0beta47 [September 11, 2010]

+  Fixed a number of problems with 64-bit compilation reported by Visual

+    Studio 2010 (John Bowler).

+

+Version 1.5.0beta48 [October 4, 2010]

+  Updated CMakeLists.txt (Philip Lowman).

+  Revised autogen.sh to recognize and use $AUTOCONF, $AUTOMAKE, $AUTOHEADER,

+    $AUTOPOINT, $ACLOCAL and $LIBTOOLIZE

+  Fixed problem with symbols creation in Makefile.am which was assuming that

+    all versions of ccp write to standard output by default (Martin Banky). The

+    bug was introduced in libpng-1.2.9beta5.

+  Removed unused mkinstalldirs.

+

+Version 1.5.0beta49 [October 8, 2010]

+  Undid Makefile.am revision of 1.5.0beta48.

+

+Version 1.5.0beta50 [October 14, 2010]

+  Revised Makefile.in to account for mkinstalldirs being removed.

+  Added some "(unsigned long)" typecasts in printf statements in pngvalid.c.

+  Suppressed a compiler warning in png_handle_sPLT().

+  Check for out-of-range text compression mode in png_set_text().

+

+Version 1.5.0beta51 [October 15, 2010]

+  Changed embedded dates to "(PENDING RELEASE) in beta releases (and future

+    rc releases) to minimize the difference between releases.

+

+Version 1.5.0beta52 [October 16, 2010]

+  Restored some of the embedded dates (in png.h, png.c, documentation, etc.)

+

+Version 1.5.0beta53 [October 18, 2010]

+  Updated INSTALL to mention using "make maintainer-clean" and to remove

+    obsolete statement about a custom ltmain.sh

+  Disabled "color-tests" by default in Makefile.am so it will work with

+    automake versions earlier than 1.11.1

+  Use document name "libpng-manual.txt" instead of "libpng-<version>.txt"

+    to simplify version differences.

+  Removed obsolete remarks about setjmp handling from INSTALL.

+  Revised and renamed the typedef in png.h and png.c that was designed

+    to catch library and header mismatch.

+

+Version 1.5.0beta54 [November 10, 2010]

+  Require 48 bytes, not 64 bytes, for big_row_buf in overflow checks.

+  Used a consistent structure for the pngget.c functions.

+

+Version 1.5.0beta55 [November 21, 2010]

+  Revised png_get_uint_32, png_get_int_32, png_get_uint_16 (Cosmin)

+  Moved reading of file signature into png_read_sig (Cosmin)

+  Fixed atomicity of chunk header serialization (Cosmin)

+  Added test for io_state in pngtest.c (Cosmin)

+  Added "#!/bin/sh" at the top of contrib/pngminim/*/gather.sh scripts.

+  Changes to remove gcc warnings (John Bowler)

+    Certain optional gcc warning flags resulted in warnings in libpng code.

+    With these changes only -Wconversion and -Wcast-qual cannot be turned on.

+    Changes are trivial rearrangements of code.  -Wconversion is not possible

+    for pngrutil.c (because of the widespread use of += et al on variables

+    smaller than (int) or (unsigned int)) and -Wcast-qual is not possible

+    with pngwio.c and pngwutil.c because the 'write' callback and zlib

+    compression both fail to declare their input buffers with 'const'.

+

+Version 1.5.0beta56 [December 7, 2010]

+  Added the private PNG_UNUSED() macro definition in pngpriv.h.

+  Added some commentary about PNG_EXPORT in png.h and pngconf.h

+  Revised PNG_EXPORT() macro and added PNG_EXPORTA() macro, with the

+    objective of simplifying and improving the cosmetic appearance of png.h.

+  Fixed some incorrect "=" macro names in pnglibconf.dfa

+  Included documentation of changes in 1.5.0 from 1.4.x in libpng-manual.txt

+

+Version 1.5.0beta57 [December 9, 2010]

+  Documented the pngvalid gamma error summary with additional comments and

+    print statements.

+  Improved missing symbol handling in checksym.awk; symbols missing in both

+    the old and new files can now be optionally ignored, treated as errors

+    or warnings.

+  Removed references to pngvcrd.c and pnggccrd.c from the vstudio project.

+  Updated "libpng14" to "libpng15" in the visualc71 project.

+  Enabled the strip16 tests in pngvalid.`

+  Don't display test results (except PASS/FAIL) when running "make test".

+    Instead put them in pngtest-log.txt

+  Added "--with-zprefix=<string>" to configure.ac

+  Updated the prebuilt configuration files to autoconf version 2.68

+

+Version 1.5.0beta58 [December 19, 2010]

+  Fixed interlace image handling and add test cases (John Bowler)

+  Fixed the clean rule in Makefile.am to remove pngtest-log.txt

+  Made minor changes to work around warnings in gcc 3.4

+

+Version 1.5.0rc01 [December 27, 2010]

+  No changes.

+

+Version 1.5.0rc02 [December 27, 2010]

+  Eliminated references to the scripts/*.def files in project/visualc71.

+

+Version 1.5.0rc03 [December 28, 2010]

+  Eliminated scripts/*.def and revised Makefile.am accordingly

+

+Version 1.5.0rc04 [December 29, 2010]

+  Fixed bug in background transformation handling in pngrtran.c (it was

+    looking for the flag in png_ptr->transformations instead of in

+    png_ptr->flags) (David Raymond).

+

+Version 1.5.0rc05 [December 31, 2010]

+  Fixed typo in a comment in CMakeLists.txt (libpng14 => libpng15) (Cosmin)

+

+Version 1.5.0rc06 [January 4, 2011]

+  Changed the new configure option "zprefix=string" to "zlib-prefix=string"

+

+Version 1.5.0rc07 [January 4, 2011]

+  Updated copyright year.

+

+Version 1.5.0 [January 6, 2011]

+  No changes.

+

+version 1.5.1beta01 [January 8, 2011]

+  Added description of png_set_crc_action() to the manual.

+  Added a note in the manual that the type of the iCCP profile was changed

+    from png_charpp to png_bytepp in png_get_iCCP().  This change happened

+    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, 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).

+  Updated CMakeLists.txt (Clifford Yapp)

+

+Version 1.5.1beta03 [January 14, 2011]

+  Fixed typecasting of some png_debug() statements (Cosmin)

+

+Version 1.5.1beta04 [January 16, 2011]

+  Updated documentation of png_set|get_tRNS() (Thomas Klausner).

+  Mentioned in the documentation that applications must #include "zlib.h"

+    if they need access to anything in zlib.h, and that a number of

+    macros such as png_memset() are no longer accessible by applications.

+  Corrected pngvalid gamma test "sample" function to access all of the color

+    samples of each pixel, instead of sampling the red channel three times.

+  Prefixed variable names index, div, exp, gamma with "png_" to avoid "shadow"

+    warnings, and (mistakenly) changed png_exp() to exp().

+

+Version 1.5.1beta05 [January 16, 2011]

+  Changed variable names png_index, png_div, png_exp, and png_gamma to

+    char_index, divisor, exp_b10, and gamma_val, respectively, and

+    changed exp() back to png_exp().

+

+Version 1.5.1beta06 [January 20, 2011]

+  Prevent png_push_crc_skip() from hanging while reading an unknown chunk

+    or an over-large compressed zTXt chunk with the progressive reader.

+  Eliminated more GCC "shadow" warnings.

+  Revised png_fixed() in png.c to avoid compiler warning about reaching the

+    end without returning anything.

+

+Version 1.5.1beta07 [January 22, 2011]

+  In the manual, describe the png_get_IHDR() arguments in the correct order.

+  Added const_png_structp and const_png_infop types, and used them in

+    prototypes for most png_get_*() functions.

+

+Version 1.5.1beta08 [January 23, 2011]

+  Added png_get_io_chunk_type() and deprecated png_get_io_chunk_name()

+  Added synopses for the IO_STATE functions and other missing synopses

+    to the manual. Removed the synopses from libpngpf.3 because they

+    were out of date and no longer useful.  Better information can be

+    obtained by reading the prototypes and comments in pngpriv.h

+  Attempted to fix cpp on Solaris with S. Studio 12 cc, fix build

+    Added a make macro DFNCPP that is a CPP that will accept the tokens in

+    a .dfn file and adds configure stuff to test for such a CPP.  ./configure

+    should fail if one is not available.

+  Corrected const_png_ in png.h to png_const_ to avoid polluting the namespace.

+  Added png_get_current_row_number and png_get_current_pass_number for the

+    benefit of the user transform callback.

+  Added png_process_data_pause and png_process_data_skip for the benefit of

+    progressive readers that need to stop data processing or want to optimize

+    skipping of unread data (e.g., if the reader marks a chunk to be skipped.)

+

+Version 1.5.1beta09 [January 24, 2011]

+  Enhanced pngvalid, corrected an error in gray_to_rgb, corrected doc error.

+    pngvalid contains tests of transforms, which tests are currently disabled

+    because they are incompletely tested.  gray_to_rgb was failing to expand

+    the bit depth for smaller bit depth images; this seems to be a long

+    standing error and resulted, apparently, in invalid output

+    (CVE-2011-0408, CERT VU#643140).  The documentation did not accurately

+    describe what libpng really does when converting RGB to gray.

+

+Version 1.5.1beta10 [January 27, 2010]

+  Fixed incorrect examples of callback prototypes in the manual, that were

+    introduced in libpng-1.0.0.

+  In addition the order of the png_get_uint macros with respect to the

+    relevant function definitions has been reversed.  This helps the

+    preprocessing of the symbol files be more robust.  Furthermore, the

+    symbol file preprocessing now uses -DPNG_NO_USE_READ_MACROS even when

+    the library may actually be built with PNG_USE_READ_MACROS; this stops

+    the read macros interfering with the symbol file format.

+  Made the manual, synopses, and function prototypes use the function

+    argument names file_gamma, int_file_gamma, and srgb_intent consistently.

+

+Version 1.5.1beta11 [January 28, 2011]

+  Changed PNG_UNUSED from "param=param;" to "{if(param){}}".

+  Corrected local variable type in new API png_process_data_skip()

+    The type was self-evidently incorrect but only causes problems on 64-bit

+    architectures.

+  Added transform tests to pngvalid and simplified the arguments.

+

+Version 1.5.1rc01 [January 29, 2011]

+  No changes.

+

+Version 1.5.1rc02 [January 31, 2011]

+  Added a request in the manual that applications do not use "png_" or

+    "PNG_" to begin any of their own symbols.

+  Changed PNG_UNUSED to "(void)param;" and updated the commentary in pngpriv.h

+

+Version 1.5.1 [February 3, 2011]

+  No changes.

+

+Version 1.5.2beta01 [February 13, 2011]

+  More -Wshadow fixes for older gcc compilers.  Older gcc versions apparently

+    check formal parameters names in function declarations (as well as

+    definitions) to see if they match a name in the global namespace.

+  Revised PNG_EXPORTA macro to not use an empty parameter, to accommodate the

+    old VisualC++ preprocessor.

+  Turned on interlace handling in png_read_png().

+  Fixed gcc pendantic warnings.

+  Handle longjmp in Cygwin.

+  Fixed png_get_current_row_number() in the interlaced case.

+  Cleaned up ALPHA flags and transformations.

+  Implemented expansion to 16 bits.

+

+Version 1.5.2beta02 [February 19, 2011]

+  Fixed mistake in the descriptions of user read_transform and write_transform

+    function prototypes in the manual.  The row_info struct is png_row_infop.

+  Reverted png_get_current_row_number() to previous (1.5.2beta01) behavior.

+  Corrected png_get_current_row_number documentation

+  Fixed the read/write row callback documentation.

+    This documents the current behavior, where the callback is called after

+    every row with information pertaining to the next row.

+

+Version 1.5.2beta03 [March 3, 2011]

+  Fixed scripts/makefile.vcwin32

+  Updated contrib/pngsuite/README to add the word "modify".

+  Define PNG_ALLOCATED to blank when _MSC_VER<1300.

+

+Version 1.5.2rc01 [March 19, 2011]

+  Define remaining attributes to blank when MSC_VER<1300.

+  ifdef out mask arrays in pngread.c when interlacing is not supported.

+

+Version 1.5.2rc02 [March 22, 2011]

+  Added a hint to try CPP=/bin/cpp if "cpp -E" fails in scripts/pnglibconf.mak

+    and in contrib/pngminim/*/makefile, eg., on SunOS 5.10, and removed "strip"

+    from the makefiles.

+  Fixed a bug (present since libpng-1.0.7) that makes png_handle_sPLT() fail

+    to compile when PNG_NO_POINTER_INDEXING is defined (Chubanov Kirill)

+

+Version 1.5.2rc03 [March 24, 2011]

+  Don't include standard header files in png.h while building the symbol table,

+    to avoid cpp failure on SunOS (introduced PNG_BUILDING_SYMBOL_TABLE macro).

+

+Version 1.5.2 [March 31, 2011]

+  No changes.

+

+Version 1.5.3beta01 [April 1, 2011]

+  Re-initialize the zlib compressor before compressing 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.

+  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-1.2.6beta03).

+  Optimize the zlib CMF byte in non-IDAT compressed chunks

+

+Version 1.5.3beta03 [April 16, 2011]

+  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-1.5.2beta01 (bug report by Andrew Church).

+

+Version 1.5.3beta04 [April 27, 2011]

+  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 possible clash with the png_jmpbuf macro on some platforms.

+

+Version 1.5.3beta05 [May 6, 2011]

+  Added the "_POSIX_SOURCE" feature test macro 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.

+  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.

+  Pass "" instead of '\0' to png_default_error() in png_err().  This mistake

+    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

+    introduced in libpng-1.5.3beta01-02).  This was because the attempt to

+    reset the zlib stream in png_write_IDAT happened after the first IDAT

+    chunk had been deflated - much too late.  In this change 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.

+

+Version 1.5.3beta06 [May 8, 2011]

+  Removed the -D_ALL_SOURCE from definitions for AIX in CMakeLists.txt

+  Implemented premultiplied alpha support: png_set_alpha_mode API

+

+Version 1.5.3beta07 [May 11, 2011]

+  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.

+

+Version 1.5.3beta08 [May 16, 2011]

+  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.  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

+    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.

+

+Version 1.5.3beta09 [May 17, 2011]

+  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!

+

+Version 1.5.3beta10 [May 20, 2011]

+

+  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.

+

+Version 1.5.3rc01 [June 3, 2011]

+  No changes.

+

+Version 1.5.3rc02 [June 8, 2011]

+  Fixed uninitialized memory read in png_format_buffer() (Bug report by

+    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. 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

+    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.

+

+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

+    and there will be no libpng-1.5.3 release.

+

+Version 1.5.4beta01 [June 14, 2011]

+  Made it possible to undefine PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED

+    to get the same (inaccurate) output as libpng-1.5.2 and earlier.

+  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.

+

+Version 1.5.4beta02 [June 14, 2011]

+  Fixed and clarified LEGACY 16-to-8 scaling code.

+  Added png_set_chop_16() API, to match inaccurate results from previous

+    libpng versions.

+  Removed the ACCURATE and LEGACY options (they are no longer useable)

+  Use the old scaling method for background if png_set_chop_16() was

+    called.

+  Made png_set_chop_16() API removeable by disabling PNG_CHOP_16_TO_8_SUPPORTED

+

+Version 1.5.4beta03 [June 15, 2011]

+  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.

+  Correction to the expand_16 code; removed extra instance of

+    png_set_scale_16_to_8 from pngpriv.h

+

+Version 1.5.4beta04 [June 16, 2011]

+  Added a missing "#ifdef PNG_READ_BACKGROUND_SUPPORTED/#endif" in pngrtran.c

+  Added PNG_TRANSFORM_CHOP_16 to the high-level read transforms.

+  Made PNG_READ_16_TO_8_ACCURATE_SCALE configurable again.  If this is

+    not enabled, png_set_strip_16() and png_do_scale_16_to_8() aren't built.

+  Revised contrib/visupng, gregbook, and pngminim to demonstrate chop_16_to_8

+

+Version 1.5.4beta05 [June 16, 2011]

+  Renamed png_set_strip_16() to png_set_scale_16() and renamed

+    png_set_chop_16() to png_set_strip(16) in an attempt to minimize the

+    behavior changes between libpng14 and libpng15.

+

+Version 1.5.4beta06 [June 18, 2011]

+  Fixed new bug that was causing both strip_16 and scale_16 to be applied.

+

+Version 1.5.4beta07 [June 19, 2011]

+  Fixed pngvalid, simplified macros, added checking for 0 in sCAL.

+    The ACCURATE scale macro is no longer defined in 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.

+

+Version 1.5.4beta08 [June 23, 2011]

+  Fixed pngvalid if ACCURATE_SCALE is defined.

+  Updated scripts/pnglibconf.h.prebuilt.

+

+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

+https://lists.sourceforge.net/lists/listinfo/png-mng-implement

+to subscribe)

+or to glennrp at users.sourceforge.net

+

+Glenn R-P

+#endif