update for libpng 1.6.3 + aMNG patch

git-svn-id: http://svn.miranda-ng.org/main/trunk@5662 1316c22d-e87f-b044-9b9b-93d7a3e3ba9c

1 files changed, 783 insertions, 84 deletions

diff --git a/plugins/AdvaImg/src/LibPNG/CHANGES b/plugins/AdvaImg/src/LibPNG/CHANGES
index d3c0cccc1c..0d6e5feea3 100644
--- a/plugins/AdvaImg/src/LibPNG/CHANGES
+++ b/plugins/AdvaImg/src/LibPNG/CHANGES
@@ -3672,7 +3672,8 @@ Version 1.5.6 [November 3, 2011]
   No changes.

 

 Version 1.5.7beta01 [November 4, 2011]

-  Added support for ARM processor (Mans Rullgard)

+  Added support for ARM processor, when decoding all PNG up-filtered rows

+    and any other-filtered rows with 3 or 4 bytes per pixel (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

@@ -3775,150 +3776,848 @@ Version 1.5.7rc03 [December 7, 2011]
 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.

+  Fixed minor memset/sizeof errors in pngvalid.c.

+

+Version 1.6.0beta01 [December 15, 2011]

+  Removed machine-generated configure files from the GIT repository (they will

+    continue to appear in the tarball distributions and in the libpng15 and

+    earlier GIT branches).

+  Restored the new 'simplified' API, which was started in libpng-1.5.7beta02

+    but later deleted from libpng-1.5.7beta05.

+  Added example programs for the new 'simplified' API.

+  Added ANSI-C (C90) headers and require them, and take advantage of the

+    change. Also fixed some of the projects/* and contrib/* files that needed

+    updates for libpng16 and the move of pngvalid.c.

+    With this change the required ANSI-C header files are assumed to exist: the

+    implementation must provide float.h, limits.h, stdarg.h and stddef.h and

+    libpng relies on limits.h and stddef.h existing and behaving as defined

+    (the other two required headers aren't used).  Non-ANSI systems that don't

+    have stddef.h or limits.h will have to provide an appropriate fake

+    containing the relevant types and #defines.

+  The use of FAR/far has been eliminated and the definition of png_alloc_size_t

+    is now controlled by a flag so that 'small size_t' systems can select it

+    if necessary.  Libpng 1.6 may not currently work on such systems -- it

+    seems likely that it will ask 'malloc' for more than 65535 bytes with any

+    image that has a sufficiently large row size (rather than simply failing

+    to read such images).

+  New tools directory containing tools used to generate libpng code.

+  Fixed race conditions in parallel make builds. With higher degrees of

+    parallelism during 'make' the use of the same temporary file names such

+    as 'dfn*' can result in a race where a temporary file from one arm of the

+    build is deleted or overwritten in another arm.  This changes the

+    temporary files for suffix rules to always use $* and ensures that the

+    non-suffix rules use unique file names.

+

+Version 1.6.0beta02 [December 21, 2011]

+  Correct configure builds where build and source directories are separate.

+    The include path of 'config.h' was erroneously made relative in pngvalid.c

+    in libpng 1.5.7.

+

+Version 1.6.0beta03 [December 22, 2011]

+  Start-up code size improvements, error handler flexibility. These changes

+    alter how the tricky allocation of the initial png_struct and png_info

+    structures are handled. png_info is now handled in pretty much the same

+    way as everything else, except that the allocations handle NULL return

+    silently.  png_struct is changed in a similar way on allocation and on

+    deallocation a 'safety' error handler is put in place (which should never

+    be required).  The error handler itself is changed to permit mismatches

+    in the application and libpng error buffer size; however, this means a

+    silent change to the API to return the jmp_buf if the size doesn't match

+    the size from the libpng compilation; libpng now allocates the memory and

+    this may fail.  Overall these changes result in slight code size

+    reductions; however, this is a reduction in code that is always executed

+    so is particularly valuable.  Overall on a 64-bit system the libpng DLL

+    decreases in code size by 1733 bytes.  pngerror.o increases in size by

+    about 465 bytes because of the new functionality.

+  Added png_convert_to_rfc1123_buffer() and deprecated png_convert_to_rfc1123()

+    to avoid including a spurious buffer in the png_struct.

+

+Version 1.6.0beta04 [December 30, 2011]

+  Regenerated configure scripts with automake-1.11.2

+  Eliminated png_info_destroy(). It is now used only in png.c and only calls

+    one other internal function and memset().

+  Enabled png_get_sCAL_fixed() if floating point APIs are enabled. Previously

+    it was disabled whenever internal fixed point arithmetic was selected,

+    which meant it didn't exist even on systems where FP was available but not

+    preferred.

+  Added pngvalid.c compile time checks for const APIs.

+  Implemented 'restrict' for png_info and png_struct. Because of the way

+    libpng works both png_info and png_struct are always accessed via a

+    single pointer.  This means adding C99 'restrict' to the pointer gives

+    the compiler some opportunity to optimize the code.  This change allows

+    that.

   Moved AC_MSG_CHECKING([if libraries can be versioned]) later to the proper

     location in configure.ac (Gilles Espinasse).

+  Changed png_memcpy to C assignment where appropriate. Changed all those

+    uses of png_memcpy that were doing a simple assignment to assignments

+    (all those cases where the thing being copied is a non-array C L-value).

+  Added some error checking to png_set_*() routines.

+  Removed the reference to the non-exported function png_memcpy() from

+    example.c.

+  Fixed the Visual C 64-bit build - it requires jmp_buf to be aligned, but

+    it had become misaligned.

+  Revised contrib/pngminus/pnm2png.c to avoid warnings when png_uint_32

+    and unsigned long are of different sizes.

+

+Version 1.6.0beta05 [January 15, 2012]

+  Updated manual with description of the simplified API (copied from png.h)

   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]

+Version 1.6.0beta06 [January 24, 2012]

+  Added palette support to the simplified APIs. This commit

+    changes some of the macro definitions in png.h, app code

+    may need corresponding changes.

+  Increased the formatted warning buffer to 192 bytes.

+  Added color-map support to simplified API. This is an initial version for

+    review; the documentation has not yet been updated.

   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 1.6.0beta07 [January 28, 2012]

+  Eliminated Intel icc/icl compiler warnings. The Intel (GCC derived)

+    compiler issues slightly different warnings from those issued by the

+    current vesions of GCC. This eliminates those warnings by

+    adding/removing casts and small code rewrites.

+  Updated configure.ac from autoupdate: added --enable-werror option.

+    Also some layout regularization and removal of introduced tab characters

+    (replaced with 3-character indentation).  Obsolete macros identified by

+    autoupdate have been removed; the replacements are all in 2.59 so

+    the pre-req hasn't been changed.  --enable-werror checks for support

+    for -Werror (or the given argument) in the compiler.  This mimics the

+    gcc configure option by allowing -Werror to be turned on safely; without

+    the option the tests written in configure itself fail compilation because

+    they cause compiler warnings.

+  Rewrote autogen.sh to run autoreconf instead of running tools one-by-one.

+  Conditionalize the install rules for MINGW and CYGWIN in CMakeLists.txt and

+    set CMAKE_LIBRARY_OUTPUT_DIRECTORY to "lib" on all platforms (C. Yapp).

+  Freeze libtool files in the 'scripts' directory. This version of autogen.sh

+    attempts to dissuade people from running it when it is not, or should not,

+    be necessary.  In fact, autogen.sh does not work when run in a libpng

+    directory extracted from a tar distribution anymore. You must run it in

+    a GIT clone instead.

+  Added two images to contrib/pngsuite (1-bit and 2-bit transparent grayscale),

+    and renamed three whose names were inconsistent with those in

+    pngsuite/README.txt.

 

-Version 1.5.9beta02 [February 16, 2012]

-  Removed two unused definitions from scripts/pnglibconf.h.prebuilt

+Version 1.6.0beta08 [February 1, 2012]

+  Fixed Image::colormap misalignment in pngstest.c

+  Check libtool/libtoolize version number (2.4.2) in configure.ac

+  Divide test-pngstest.sh into separate pngstest runs for basic and

+    transparent images.

+  Moved automake options to AM_INIT_AUTOMAKE in configure.ac

+  Added color-tests, silent-rules (Not yet implemented in Makefile.am) and

+    version checking to configure.ac

+  Improved pngstest speed by not doing redundant tests and add const to

+    the background parameter of png_image_finish_read. The --background

+    option is now done automagically only when required, so that commandline

+    option no longer exists.

+  Cleaned up pngpriv.h to consistently declare all functions and data.

+    Also eliminated PNG_CONST_DATA, which is apparently not needed but we

+    can't be sure until it is gone.

+  Added symbol prefixing that allows all the libpng external symbols

+    to be prefixed (suggested by Reuben Hawkins).

+  Updated "ftbb*.png" list in the owatcom and vstudio projects.

+  Fixed 'prefix' builds on clean systems. The generation of pngprefix.h

+    should not require itself.

+  Updated INSTALL to explain that autogen.sh must be run in a GIT clone,

+    not in a libpng directory extracted from a tar distribution.

+

+Version 1.6.0beta09 [February 1, 2012]

+  Reverted the prebuilt configure files to libpng-1.6.0beta05 condition.

+

+Version 1.6.0beta10 [February 3, 2012]

+  Added Z_SOLO for zlib-1.2.6+ and correct pngstest tests

+  Updated list of test images in CMakeLists.txt

+  Updated the prebuilt configure files to current condition.

+  Revised INSTALL information about autogen.sh; it works in tar distributions.

+

+Version 1.6.0beta11 [February 16, 2012]

+  Fix character count in pngstest command in projects/owatcom/pngstest.tgt

+  Revised test-pngstest.sh to report PASS/FAIL for each image.

+  Updated documentation about the simplified API.

+  Corrected estimate of error in libpng png_set_rgb_to_gray API.  The API is

+    extremely inaccurate for sRGB conversions because it uses an 8-bit

+    intermediate linear value and it does not use the sRGB transform, so it

+    suffers from the known instability in gamma transforms for values close

+    to 0 (see Poynton).  The net result is that the calculation has a maximum

+    error of 14.99/255; 0.5/255^(1/2.2).  pngstest now uses 15 for the

+    permitted 8-bit error. This may still not be enough because of arithmetic

+    error.

   Removed some unused arrays (with #ifdef) from png_read_push_finish_row().

+  Fixed a memory overwrite bug in simplified read of RGB PNG with

+    non-linear gamma Also bugs in the error checking in pngread.c and changed

+    quite a lot of the checks in pngstest.c to be correct; either correctly

+    written or not over-optimistic.  The pngstest changes are insufficient to

+    allow all possible RGB transforms to be passed; pngstest cmppixel needs

+    to be rewritten to make it clearer which errors it allows and then changed

+    to permit known inaccuracies.

   Removed tests for no-longer-used *_EMPTY_PLTE_SUPPORTED from pngstruct.h

-

-Version 1.5.9rc01 [February 17, 2012]

+  Fixed fixed/float API export conditionals. 1) If FIXED_POINT or

+    FLOATING_POINT options were switched off, png.h ended up with lone ';'

+    characters.  This is not valid ANSI-C outside a function.  The ';'

+    characters have been moved inside the definition of PNG_FP_EXPORT and

+    PNG_FIXED_EXPORT. 2) If either option was switched off, the declaration

+    of the corresponding functions were completely omitted, even though some

+    of them are still used internally.  The result is still valid, but

+    produces warnings from gcc with some warning options (including -Wall). The

+    fix is to cause png.h to declare the functions with PNG_INTERNAL_FUNCTION

+    when png.h is included from pngpriv.h.

+  Check for invalid palette index while reading paletted PNG.  When one is

+    found, issue a warning and increase png_ptr->num_palette accordingly.

+    Apps are responsible for checking to see if that happened.

+

+Version 1.6.0beta12 [February 18, 2012]

+  Do not increase num_palette on invalid_index.

+  Relocated check for invalid palette index to pngrtran.c, after unpacking

+    the sub-8-bit pixels.

   Fixed CVE-2011-3026 buffer overrun bug.  This bug was introduced when

     iCCP chunk support was added at libpng-1.0.6. 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.

-

-Version 1.5.10beta01 [February 24, 2012]

-  Removed two useless #ifdef directives from pngread.c and one from pngrutil.c

-  Always put the CMAKE_LIBRARY in "lib" (removed special WIN32 case).

-  Removed empty vstudio/pngstest directory (Clifford Yapp).

+Version 1.6.0beta13 [February 24, 2012]

   Eliminated redundant png_push_read_tEXt|zTXt|iTXt|unknown code from

     pngpread.c and use the sequential png_handle_tEXt, etc., in pngrutil.c;

     now that png_ptr->buffer is inaccessible to applications, the special

     handling is no longer useful.

-  Fixed bug with png_handle_hIST with odd chunk length (Frank Busse).

-  Added PNG_SAFE_LIMITS feature to pnglibconf.dfa and code in pngconf.h

-    to reset the user limits to safe ones if PNG_SAFE_LIMITS is defined.

-    To enable, use "CPPFLAGS=-DPNG_SAFE_LIMITS_SUPPORTED" on the configure

-    command or put "#define PNG_SAFE_LIMITS_SUPPORTED" in pnglibconf.h.

-  Revised the SAFE_LIMITS feature to be the same as the feature in libpng16.

-  Added information about the new limits in the manual.

+  Added PNG_SAFE_LIMITS feature to pnglibconf.dfa, pngpriv.h, and new

+    pngusr.dfa to reset the user limits to safe ones if PNG_SAFE_LIMITS is

+    defined.  To enable, use "CPPFLAGS=-DPNG_SAFE_LIMITS_SUPPORTED=1" on the

+    configure command or put #define PNG_SAFE_LIMITS_SUPPORTED in

+    pnglibconf.h.prebuilt and pnglibconf.h.

 

-Version 1.5.10beta02 [February 27, 2012]

+Version 1.6.0beta14 [February 27, 2012]

+  Added information about the new limits in the manual.

   Updated Makefile.in

 

-Version 1.5.10beta03 [March 6, 2012]

+Version 1.6.0beta15 [March 2, 2012]

   Removed unused "current_text" members of png_struct and the png_free()

     of png_ptr->current_text from pngread.c

-  Added palette-index checking. Issue a png_warning() if an invalid index is

-    found.

-

-Version 1.5.10beta04 [March 10, 2012]

-  Fixed PNG_LIBPNG_BUILD_BASE_TYPE definition.

-  Fixed CMF optimization of non-IDAT compressed chunks, which was added at

-    libpng-1.5.4.  It sometimes produced too small of a window.

-

-Version 1.5.10beta05 [March 10, 2012]

+  Rewrote pngstest.c for substantial speed improvement.

+  Fixed transparent pixel and 16-bit rgb tests in pngstest and removed a

+    spurious check in pngwrite.c

+  Added PNG_IMAGE_FLAG_FAST for the benefit of applications that store

+    intermediate files, or intermediate in-memory data, while processing

+    image data with the simplified API.  The option makes the files larger

+    but faster to write and read.  pngstest now uses this by default; this

+    can be disabled with the --slow option.

+  Improved pngstest fine tuning of error numbers, new test file generator.

+    The generator generates images that test the full range of sample values,

+    allow the error numbers in pngstest to be tuned and checked.  makepng

+    also allows generation of images with extra chunks, although this is

+    still work-in-progress.

+  Added check for invalid palette index while reading.

+  Fixed some bugs in ICC profile writing. The code should now accept

+    all potentially valid ICC profiles and reject obviously invalid ones.

+    It now uses png_error() to do so rather than casually writing a PNG

+    without the necessary color data.

+  Removed whitespace from the end of lines in all source files and scripts.

+

+Version 1.6.0beta16 [March 6, 2012]

+  Relocated palette-index checking function from pngrutil.c to pngtrans.c

+  Added palette-index checking while writing.

+  Changed png_inflate() and calling routines to avoid overflow problems.

+    This is an intermediate check-in that solves the immediate problems and

+    introduces one performance improvement (avoiding a copy via png_ptr->zbuf.)

+    Further changes will be made to make ICC profile handling more secure.

+  Fixed build warnings (MSVC, GCC, GCC v3). Cygwin GCC with default options

+    declares 'index' as a global, causing a warning if it is used as a local

+    variable.  GCC 64-bit warns about assigning a (size_t) (unsigned 64-bit)

+    to an (int) (signed 32-bit).  MSVC, however, warns about using the

+    unary '-' operator on an unsigned value (even though it is well defined

+    by ANSI-C to be ~x+1).  The padding calculation was changed to use a

+    different method.  Removed the tests on png_ptr->pass.

+  Added contrib/libtests/tarith.c to test internal arithmetic functions from

+    png.c. This is a libpng maintainer program used to validate changes to the

+    internal arithmetic functions.

+  Made read 'inflate' handling like write 'deflate' handling. The read

+    code now claims and releases png_ptr->zstream, like the write code.

+    The bug whereby the progressive reader failed to release the zstream

+    is now fixed, all initialization is delayed, and the code checks for

+    changed parameters on deflate rather than always calling

+    deflatedEnd/deflateInit.

+  Validate the zTXt strings in pngvalid.

+  Added code to validate the windowBits value passed to deflateInit2().

+    If the call to deflateInit2() is wrong a png_warning will be issued

+    (in fact this is harmless, but the PNG data produced may be sub-optimal).

+

+Version 1.6.0beta17 [March 10, 2012]

+  Fixed PNG_LIBPNG_BUILD_BASE_TYPE definition. 

   Reject all iCCP chunks after the first, even if the first one is invalid.

+  Deflate/inflate was reworked to move common zlib calls into single

+    functions [rw]util.c.  A new shared keyword check routine was also added

+    and the 'zbuf' is no longer allocated on progressive read.  It is now

+    possible to call png_inflate() incrementally.  A warning is no longer

+    issued if the language tag or translated keyword in the iTXt chunk

+    has zero length.

+  If benign errors are disabled use maximum window on ancilliary inflate.

+    This works round a bug introduced in 1.5.4 where compressed ancillary

+    chunks could end up with a too-small windowBits value in the deflate

+    header.

+

+Version 1.6.0beta18 [March 16, 2012]

   Issue a png_benign_error() instead of png_warning() about bad palette index.

+  In pngtest, treat benign errors as errors if "-strict" is present.

   Fixed an off-by-one error in the palette index checking function.

+  Fixed a compiler warning under Cygwin (Windows-7, 32-bit system)

   Revised example.c to put text strings in a temporary character array

     instead of directly assigning string constants to png_textp members.

     This avoids compiler warnings when -Wwrite-strings is enabled.

-

-Version 1.5.10 [March 29, 2012]

+  Added output flushing to aid debugging under Visual Studio. Unfortunately

+    this is necessary because the VS2010 output window otherwise simply loses

+    the error messages on error (they weren't flushed to the window before

+    the process exited, apparently!)

+  Added configuration support for benign errors and changed the read

+    default. Also changed some warnings in the iCCP and sRGB handling

+    from to benign errors. Configuration now makes read benign

+    errors warnings and write benign errors to errors by default (thus

+    changing the behavior on read).  The simplified API always forces

+    read benign errors to warnings (regardless of the system default, unless

+    this is disabled in which case the simplified API can't be built.)

+

+Version 1.6.0beta19 [March 18, 2012]

+  Work around for duplicate row start calls; added warning messages.

+    This turns on PNG_FLAG_DETECT_UNINITIALIZED to detect app code that

+    fails to call one of the 'start' routines (not enabled in libpng-1.5

+    because it is technically an API change, since it did normally work

+    before.)  It also makes duplicate calls to png_read_start_row (an

+    internal function called at the start of the image read) benign, as

+    they were before changes to use png_inflate_claim. Somehow webkit is

+    causing this to happen; this is probably a mis-feature in the zlib

+    changes so this commit is only a work-round.

+  Removed erroneous setting of DETECT_UNINITIALIZED and added more

+    checks. The code now does a png_error if an attempt is made to do the

+    row initialization twice; this is an application error and it has

+    serious consequences because the transform data in png_struct is

+    changed by each call.

+  Added application error reporting and added chunk names to read

+    benign errors; also added --strict to pngstest - not enabled

+    yet because a warning is produced.

+  Avoid the double gamma correction warning in the simplified API.

+    This allows the --strict option to pass in the pngstest checks

+

+Version 1.6.0beta20 [March 29, 2012]

+  Changed chunk handler warnings into benign errors, incrementally load iCCP

+  Added checksum-icc.c to contrib/tools

   Prevent PNG_EXPAND+PNG_SHIFT doing the shift twice.

+  Recognize known sRGB ICC profiles while reading; prefer writing the

+    iCCP profile over writing the sRGB chunk, controlled by the

+    PNG_sRGB_PROFILE_CHECKS option.

   Revised png_set_text_2() to avoid potential memory corruption (fixes

     CVE-2011-3048, also known as CVE-2012-3425).

 

-Version 1.5.11beta01 [April 28, 2012]

+Version 1.6.0beta21 [April 27, 2012]

   Revised scripts/makefile.darwin: use system zlib; remove quotes around

     architecture list; add missing ppc architecture; add architecture options

     to shared library link; don't try to create a shared lib based on missing

     RELEASE variable.

   Enable png_set_check_for_invalid_index() for both read and write.

-  Removed #ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED/#endif in pngpriv.h around

+  Removed #ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED in pngpriv.h around

     declaration of png_handle_unknown().

   Added -lssp_nonshared in a comment in scripts/makefile.freebsd

     and changed deprecated NOOBJ and NOPROFILE to NO_OBJ and NO_PROFILE.

 

-Version 1.5.11rc01 [May 23, 2012]

-  No changes.

+Version 1.6.0beta22 [May 23, 2012]

+  Removed need for -Wno-cast-align with clang.  clang correctly warns on

+    alignment increasing pointer casts when -Wcast-align is passed. This

+    fixes the cases that clang warns about either by eliminating the

+    casts from png_bytep to png_uint_16p (pngread.c), or, for pngrutil.c

+    where the cast is previously verified or pngstest.c where it is OK, by

+    introducing new png_aligncast macros to do the cast in a way that clang

+    accepts.

 

-Version 1.5.11rc02 [May 29, 2012]

-  Fixed some typos in comments.

+Version 1.6.0beta23 [June 6, 2012]

   Revised CMakeLists.txt to not attempt to make a symlink under mingw.

-  Added two images to contrib/pngsuite (1-bit and 2-bit transparent grayscale),

-    and renamed three whose names were inconsistent with those in

-    pngsuite/README.txt.

-

-Version 1.5.11rc03 [June 4, 2012]

-  Do not depend upon a GCC feature macro being available for use in generating

-    the linker mapfile symbol prefix.

   Made fixes for new optimization warnings from gcc 4.7.0. The compiler

-    performed an optimization which is safe but then warned about it.

+    performs an optimization which is safe; however it then warns about it.

     Changing the type of 'palette_number' in pngvalid.c removes the warning.

+  Do not depend upon a GCC feature macro being available for use in generating

+    the linker mapfile symbol prefix.

+  Improved performance of new do_check_palette_indexes() function (only

+    update the value when it actually increases, move test for whether

+    the check is wanted out of the function.

 

-Version 1.5.11rc04 [June 6, 2012]

-  Improved performance of new do_check_palette_indexes() function.

-

-Version 1.5.11rc05 [June 7, 2012]

+Version 1.6.0beta24 [June 7, 2012]

   Don't check palette indexes if num_palette is 0 (as it can be in MNG files).

 

-Version 1.5.11 [June 14, 2012]

-  Include zlib.h in contrib/gregbook and contrib/visupng examples.

+Version 1.6.0beta25 [June 16, 2012]

+  Revised png_set_keep_unknown_chunks() so num_chunks < 0 means ignore all

+    unknown chunks and all known chunks except for IHDR, PLTE, tRNS, IDAT,

+    and IEND.  Previously it only meant ignore all unknown chunks, the

+    same as num_chunks == 0. Revised png_image_skip_unused_chunks() to

+    provide a list of chunks to be processed instead of a list of chunks to

+    ignore.  Revised contrib/gregbook/readpng2.c accordingly.

 

-Version 1.5.12 [July 11, 2012]

+Version 1.6.0beta26 [July 10, 2012]

   Removed scripts/makefile.cegcc from the *.zip and *.7z distributions; it

     depends on configure, which is not included in those archives.

+  Moved scripts/chkfmt to contrib/tools.

   Changed "a+w" to "u+w" in Makefile.in to fix CVE-2012-3386.

 

-Version 1.5.13beta01 [August 8, 2012]

+Version 1.6.0beta27 [August 11, 2012]

   Do not compile PNG_DEPRECATED, PNG_ALLOC and PNG_PRIVATE when __GNUC__ < 3.

+  Do not use __restrict when GNUC is <= 3.1

   Removed references to png_zalloc() and png_zfree() from the manual.

-  Revised PNG_FP_EXPORT and PNG_FIXED_EXPORT macros to avoid generating

-    lone semicolons (patch ported from libpng-1.6.0beta11).

-

-Version 1.5.13beta02 [September 10, 2012]

-  Corrected handling of the image array and the row_pointers array in example.c

-  When png_set_filler is used to strip a filler channel during write, the

-    code prior to 1.5 would ignore the case where the output required an

-    alpha channel or when the output was a palettized PNG.  In libpng-1.5 the

-    ignorance was lost and libpng proceeded to strip the channel resulting

-    in a bad (potential memory overwrite) failure later.  This reverts

-    the behavior to the pre-1.5 state but issues a warning. libpng-1.6 is

-    expected to issue an error on the erroneous png_set_filler call.

-  Use png_memset() consistently (pngmem.c contained some bare "memset" calls).

-

-Version 1.5.13rc01 [September 17, 2012]

+  Fixed configurations where floating point is completely disabled.  Because

+    of the changes to support symbol prefixing PNG_INTERNAL_FUNCTION declares

+    floating point APIs during libpng builds even if they are completely

+    disabled. This requires the png floating point types (png_double*) to be

+    declared even though the functions are never actually defined.  This

+    change provides a dummy definition so that the declarations work, yet any

+    implementation will fail to compile because of an incomplete type.

+  Re-eliminated the use of strcpy() in pngtest.c.  An unncessary use of

+    strcpy() was accidentally re-introduced in libpng16; this change replaces

+    it with strncpy().

+  Eliminated use of png_sizeof(); use sizeof() instead.

+  Use a consistent style for (sizeof type) and (sizeof (array))

+  Cleanup of png_set_filler().  This function does very different things on

+    read and write.  In libpng 1.6 the two cases can be distinguished and

+    considerable code cleanup, and extra error checking, is possible.  This

+    makes calls on the write side that have no effect be ignored with a

+    png_app_error(), which can be disabled in the app using

+    png_set_benign_errors(), and removes the spurious use of usr_channels

+    on the read side.

+  Insist on autotools 1.12.1 for git builds because there are security issues

+    with 1.12 and insisting on anything less would allow 1.12 to be used.

+  Removed info_ptr->signature[8] from WRITE-only builds.

+  Add some conditions for compiling png_fixed().  This is a small function

+    but it requires "-lm" on some platforms.

+  Cause pngtest --strict to fail on any warning from libpng (not just errors)

+    and cause it not to fail at the comparison step if libpng lacks support

+    for writing chunks that it reads from the input (currently only implemented

+    for compressed text chunks).

+  Make all three "make check" test programs work without READ or WRITE support.

+    Now "make check" will succeed even if libpng is compiled with -DPNG_NO_READ

+    or -DPNG_NO_WRITE.  The tests performed are reduced, but the basic reading

+    and writing of a PNG file is always tested by one or more of the tests.

+  Consistently use strlen(), memset(), memcpy(), and memcmp() instead of the

+    png_strlen(), png_memset(), png_memcpy(), and png_memcmp() macros.

+  Removed the png_sizeof(), png_strlen(), png_memset(), png_memcpy(), and

+    png_memcmp() macros.

+  Work around gcc 3.x and Microsoft Visual Studio 2010 complaints. Both object

+    to the split initialization of num_chunks.

+

+Version 1.6.0beta28 [August 29, 2012]

+  Unknown handling fixes and clean up. This adds more correct option

+    control of the unknown handling, corrects the pre-existing bug where

+    the per-chunk 'keep' setting is ignored and makes it possible to skip

+    IDAT chunks in the sequential reader (broken in earlier 1.6 versions).

+    There is a new test program, test-unknown.c, which is a work in progress

+    (not currently part of the test suite).  Comments in the header files now

+    explain how the unknown handling works.

+  Allow fine grain control of unknown chunk APIs. This change allows

+    png_set_keep_unknown_chunks() to be turned off if not required and causes

+    both read and write to behave appropriately (on read this is only possible

+    if the user callback is used to handle unknown chunks).  The change

+    also removes the support for storing unknown chunks in the info_struct

+    if the only unknown handling enabled is via the callback, allowing libpng

+    to be configured with callback reading and none of the unnecessary code.

+  Corrected fix for unknown handling in pngtest. This reinstates the

+    libpng handling of unknown chunks other than vpAg and sTER (including

+    unsafe-to-copy chunks which were dropped before) and eliminates the

+    repositioning of vpAg and sTER in pngtest.png by changing pngtest.png

+    (so the chunks are where libpng would put them).

+  Added "tunknown" test and corrected a logic error in png_handle_unknown()

+    when SAVE support is absent.  Moved the shell test scripts for

+    contrib/libtests from the libpng top directory to contrib/libtests.

+    png_handle_unknown() must always read or skip the chunk, if

+    SAVE_UNKNOWN_CHUNKS is turned off *and* the application does not set

+    a user callback an unknown chunk will not be read, leading to a read

+    error, which was revealed by the "tunknown" test.

+  Cleaned up and corrected ICC profile handling.

+    contrib/libtests/makepng: corrected 'rgb' and 'gray' cases.  profile_error

+    messages could be truncated; made a correct buffer size calculation and

+    adjusted pngerror.c appropriately. png_icc_check_* checking improved;

+    changed the functions to receive the correct color type of the PNG on read

+    or write and check that it matches the color space of the profile (despite

+    what the comments said before, there is danger in assuming the app will

+    cope correctly with an RGB profile on a grayscale image and, since it

+    violates the PNG spec, allowing it is certain to produce inconsistent

+    app behavior and might even cause app crashes.) Check that profiles

+    contain the tags needed to process the PNG (tags all required by the ICC

+    spec). Removed unused PNG_STATIC from pngpriv.h.

+

+Version 1.6.0beta29 [September 4, 2012]

+  Fixed the simplified API example programs to add the *colormap parameter

+    to several of he API and improved the error message if the version field

+    is not set.

+  Added contrib/examples/* to the *.zip and *.7z distributions.

+  Updated simplified API synopses and description of the png_image structure

+    in the manual.

+  Made makepng and pngtest produce identical PNGs, add "--relaxed" option

+    to pngtest. The "--relaxed" option turns off the benign errors that are

+    enabled by default in pre-RC builds. makepng can now write ICC profiles

+    where the length has not been extended to a multiple of 4, and pngtest

+    now intercepts all libpng errors, allowing the previously-introduced

+    "--strict test" on no warnings to actually work.

+  Improved ICC profile handling including cHRM chunk generation and fixed

+    Cygwin+MSVC build errors. The ICC profile handling now includes more

+    checking.  Several errors that caused rejection of the profile are now

+    handled with a warning in such a way that the invalid profiles will be

+    read by default in release (but not pre-RC) builds but will not be

+    written by default.  The easy part of handling the cHRM chunk is written,

+    where the ICC profile contains the required data.  The more difficult

+    part plus guessing a gAMA value requires code to pass selected RGB values

+    through the profile.

+

+Version 1.6.0beta30 [October 24, 2012]

+  Changed ICC profile matrix/vector types to not depend on array type rules.

+    By the ANSI-C standard the new types should be identical to the previous

+    versions, and all known versions of gcc tested with the previous versions

+    except for GCC-4.2.1 work with this version.  The change makes the ANSI-C

+    rule that const applied to an array of elements applies instead to the

+    elements in the array moot by explicitly applying const to the base

+    elements of the png_icc_matrix and png_icc_vector types. The accidental

+    (harmless) 'const' previously applied to the parameters of two of the

+    functions have also been removed.

+  Added a work around for GCC 4.2 optimization bug.

+  Marked the broken (bad white point) original HP sRGB profiles correctly and

+    correct comments.

+  Added -DZ_SOLO to contrib/pngminim/*/makefile to work with zlib-1.2.7

+  Use /MDd for vstudio debug builds. Also added pngunkown to the vstudio

+    builds, fixed build errors and corrected a minor exit code error in

+    pngvalid if the 'touch' file name is invalid.

+  Add updated WARNING file to projects/vstudio from libpng 1.5/vstudio

+  Fixed build when using #define PNG_NO_READ_GAMMA in png_do_compose() in

+    pngrtran.c (Domani Hannes).

+

+Version 1.6.0beta31 [November 1, 2012]

+  Undid the erroneous change to vstudio/pngvalid build in libpng-1.6.0beta30.

+  Made pngvalid so that it will build outside the libpng source tree.

+  Made builds -DPNG_NO_READ_GAMMA compile (the unit tests still fail).

+  Made PNG_NO_READ_GAMMA switch off interfaces that depend on READ_GAMMA.

+    Prior to 1.6.0 switching off READ_GAMMA did unpredictable things to the

+    interfaces that use it (specifically, png_do_background in 1.4 would

+    simply display composite for grayscale images but do composition

+    with the incorrect arithmetic for color ones). In 1.6 the semantic

+    of -DPNG_NO_READ_GAMMA is changed to simply disable any interface that

+    depends on it; this obliges people who set it to consider whether they

+    really want it off if they happen to use any of the interfaces in

+    question (typically most users who disable it won't).

+  Fixed GUIDs in projects/vstudio. Some were duplicated or missing,

+    resulting in VS2010 having to update the files.

+  Removed non-working ICC profile support code that was mostly added to

+    libpng-1.6.0beta29 and beta30. There was too much code for too little

+    gain; implementing full ICC color correction may be desireable but is left

+    up to applications.

+

+Version 1.6.0beta32 [November 25, 2012]

+  Fixed an intermittent SEGV in pngstest due to an uninitialized array element.

+  Added the ability for contrib/libtests/makepng.c to make a PNG with just one

+    color. This is useful for debugging pngstest color inaccuracy reports.

+  Fixed error checking in the simplified write API (Olaf van der Spek)

+  Made png_user_version_check() ok to use with libpng version 1.10.x and later.

+

+Version 1.6.0beta33 [December 15, 2012]

+  Fixed typo in png.c (PNG_SET_CHUNK_MALLOC_MAX should be PNG_CHUNK_MALLOC_MAX)

+    that causes the MALLOC_MAX limit not to work (John Bowler)

+  Change png_warning() to png_app_error() in pngwrite.c and comment the

+    fall-through condition.

+  Change png_warning() to png_app_warning() in png_write_tRNS().

+  Rearranged the ARM-NEON optimizations: Isolated the machine specific code

+    to the hardware subdirectory and added comments to pngrutil.c so that

+    implementors of other optimizations know what to do.

+  Fixed cases of unquoted DESTDIR in Makefile.am

+  Rebuilt Makefile.in, etc., with autoconf-2.69 and automake-1.12.5.

+

+Version 1.6.0beta34 [December 19, 2012]

+  Cleaned up whitespace in the synopsis portion of the manpage "libpng.3"

+  Disassembled the version number in scripts/options.awk (necessary for

+    building on SunOs).

+

+Version 1.6.0beta35 [December 23, 2012]

+  Made default Zlib compression settings be configurable. This adds #defines to

+    pnglibconf.h to control the defaults.

+  Fixed Windows build issues, enabled ARM compilation. Various warnings issued

+    by earlier versions of GCC fixed for Cygwin and Min/GW (which both use old

+    GCCs.) ARM support is enabled by default in zlib.props (unsupported by

+    Microsoft) and ARM compilation is made possible by deleting the check for

+    x86. The test programs cannot be run because they are not signed.

+

+Version 1.6.0beta36 [January 2, 2013]

+  Discontinued distributing libpng-1.x.x.tar.bz2.

+  Discontinued distributing libpng-1.7.0-1.6.0-diff.txt and similar.

+  Rebuilt configure with autoconf-2.69 (inadvertently not done in beta33)

+  Fixed 'make distcheck' on SUN OS - libpng.so was not being removed

+

+Version 1.6.0beta37 [January 10, 2013]

+  Fixed conceivable but difficult to repro overflow. Also added two test

+    programs to generate and test a PNG which should have the problem.

+

+Version 1.6.0beta39 [January 19, 2013]

+  Again corrected attempt at overflow detection in png_set_unknown_chunks().

+  Added overflow detection in png_set_sPLT() and png_set_text_2().

+

+Version 1.6.0beta40 [January 20, 2013]

+  Use consistent handling of overflows in text, sPLT and unknown png_set_* APIs

+

+Version 1.6.0rc01 [January 26, 2013]

   No changes.

 

-Version 1.5.13 [September 27, 2012]

+Version 1.6.0rc02 [February 4, 2013]

+  Added png_get_palette_max() function.

+

+Version 1.6.0rc03 [February 5, 2013]

+  Fixed the png_get_palette_max API.

+

+Version 1.6.0rc04 [February 7, 2013]

+  Turn serial tests back on (recently turned off by autotools upgrade).

+

+Version 1.6.0rc05 [February 8, 2013]

+  Update manual about png_get_palette_max().

+

+Version 1.6.0rc06 [February 9, 2013]

+  Fixed missing dependency in --prefix builds The intermediate

+    internal 'prefix.h' file can only be generated correctly after

+    pnglibconf.h, however the dependency was not in Makefile.am.  The

+    symptoms are unpredictable depending on the order make chooses to

+    build pngprefix.h and pnglibconf.h, often the error goes unnoticed

+    because there is a system pnglibconf.h to use instead.

+

+Version 1.6.0rc07 [February 10, 2013]

+  Enclosed the new png_get_palette_max in #ifdef PNG_GET_PALETTE_MAX_SUPPORTED

+    block, and revised pnglibconf.h and pnglibconf.h.prebuilt accordingly.

+

+Version 1.6.0rc08 [February 10, 2013]

+  Fix typo in png.h #ifdef

+

+Version 1.6.0 [February 14, 2013]

+  No changes.

+

+Version 1.6.1beta01 [February 16, 2013]

+  Made symbol prefixing work with the ARM neon optimizations. Also allow

+    pngpriv.h to be included for preprocessor definitions only, so it can

+    be used in non-C/C++ files. Back ported from libpng 1.7.

+  Made sRGB check numbers consistent.

+  Ported libpng 1.5 options.awk/dfn file handling to 1.6, fixed one bug.

+  Removed cc -E workround, corrected png_get_palette_max API Tested on

+    SUN OS cc 5.9, which demonstrates the tokenization problem previously

+    avoided by using /lib/cpp.  Since all .dfn output is now protected in

+    double quotes unless it is to be macro substituted the fix should

+    work everywhere.

+  Enabled parallel tests - back ported from libpng-1.7.

+  scripts/pnglibconf.dfa formatting improvements back ported from libpng17.

+  Fixed a race condition in the creation of the build 'scripts' directory

+    while building with a parallel make.

+  Use approved/supported Android method to check for NEON, use Linux/POSIX

+    1003.1 API to check /proc/self/auxv avoiding buffer allocation and other

+    library calls (ported from libpng15).

+

+Version 1.6.1beta02 [February 19, 2013]

+  Use parentheses more consistently in "#if defined(MACRO)" tests.

+  Folded long lines.

+  Reenabled code to allow zero length PLTE chunks for MNG.

+

+Version 1.6.1beta03 [February 22, 2013]

+  Fixed ALIGNED_MEMORY support.

+  Allow run-time ARM NEON checking to be disabled. A new configure option:

+    --enable-arm-neon=always will stop the run-time checks. New checks

+    within arm/arm_init.c will cause the code not to be compiled unless

+    __ARM_NEON__ is set. This should make it fail safe (if someone asks

+    for it on then the build will fail if it can't be done.)

+  Updated the INSTALL document.

+

+Version 1.6.1beta04 [February 27, 2013]

+  Revised INSTALL to recommend using CPPFLAGS instead of INCLUDES.

+  Revised scripts/makefile.freebsd to respect ZLIBLIB and ZLIBINC.

+  Revised scripts/dfn.awk to work with the buggy MSYS awk that has trouble

+    with CRLF line endings.

+

+Version 1.6.1beta05 [March 1, 2013]

+  Avoid a possible memory leak in contrib/gregbook/readpng.c

+

+Version 1.6.1beta06 [March 4, 2013]

+  Better documentation of unknown handling API interactions.

+  Corrected Android builds and corrected libpng.vers with symbol

+    prefixing This adds an API to set optimization options externally,

+    providing an alternative and general solution for the non-portable

+    run-time tests used by the ARM Neon code.  It also makes those tests

+    compile and link on Android.

+  The order of settings vs options in pnglibconf.h is reversed to allow

+    settings to depend on options and options can now set (or override) the

+    defaults for settings.

+

+Version 1.6.1beta07 [March 7, 2013]

+  Corrected simplified API default gamma for color-mapped output, added

+    a flag to change default. In 1.6.0 when the simplified API was used

+    to produce color-mapped output from an input image with no gamma

+    information the gamma assumed for the input could be different from

+    that assumed for non-color-mapped output.  In particular 16-bit depth

+    input files were assumed to be sRGB encoded, whereas in the 'direct'

+    case they were assumed to have linear data.  This was an error.  The

+    fix makes the simplified API treat all input files the same way and

+    adds a new flag to the png_image::flags member to allow the

+    application/user to specify that 16-bit files contain sRGB data

+    rather than the default linear.

+  Fixed bugs in the pngpixel and makepng test programs.

+

+Version 1.6.1beta08 [March 7, 2013]

+  Fixed CMakelists.txt to allow building a single variant of the library

+    (Claudio Bley):

+  Introduced a PNG_LIB_TARGETS variable that lists all activated library

+    targets.  It is an error if this variable ends up empty, ie. you have

+    to build at least one library variant.

+  Made the *_COPY targets only depend on library targets actually being build.

+  Use PNG_LIB_TARGETS to unify a code path.

+  Changed the CREATE_SYMLINK macro to expect the full path to a file as the

+    first argument. When symlinking the filename component of that path is

+    determined and used as the link target.

+  Use copy_if_different in the CREATE_SYMLINK macro.

+

+Version 1.6.1beta09 [March 13, 2013]

+  Eliminated two warnings from the Intel C compiler. The warnings are

+    technically valid, although a reasonable treatment of division would

+    show it to be incorrect.

+

+Version 1.6.1rc01 [March 21, 2013]

+  No changes.

+

+Version 1.6.1 [March 28, 2013]

   No changes.

 

+Version 1.6.2beta01 [April 14, 2013]

+  Updated documentation of 1.5.x to 1.6.x changes in iCCP chunk handling.

+  Fixed incorrect warning of excess deflate data. End condition - the

+    warning would be produced if the end of the deflate stream wasn't read

+    in the last row.  The warning is harmless.

+  Corrected the test on user transform changes on read. It was in the

+    png_set of the transform function, but that doesn't matter unless the

+    transform function changes the rowbuf size, and that is only valid if

+    transform_info is called.

+  Corrected a misplaced closing bracket in contrib/libtests/pngvalid.c

+    (Flavio Medeiros).

+  Corrected length written to uncompressed iTXt chunks (Samuli Suominen).

+    Bug was introduced in libpng-1.6.0.

+

+Version 1.6.2rc01 [April 18, 2013]

+  Added contrib/tools/fixitxt.c, to repair the erroneous iTXt chunk length

+    written by libpng-1.6.0 and 1.6.1.

+  Disallow storing sRGB information when the sRGB is not supported.

+

+Version 1.6.2rc02 [April 18, 2013]

+  Merge pngtest.c with libpng-1.7.0

+

+Version 1.6.2rc03 [April 22, 2013]

+  Trivial spelling cleanup.

+

+Version 1.6.2rc04 and 1.6.2rc05 [omitted]

+

+Version 1.6.2rc06 [April 24, 2013]

+  Reverted to version 1.6.2rc03.  Recent changes to arm/neon support

+    have been ported to libpng-1.7.0beta09 and will reappear in version

+    1.6.3beta01.

+

+Version 1.6.2 [April 25, 2013]

+  No changes.

+

+Version 1.6.3beta01 [April 25, 2013]

+  Revised stack marking in arm/filter_neon.S and configure.ac.

+  Ensure that NEON filter stuff is completely disabled when switched 'off'.

+    Previously the ARM NEON specific files were still built if the option

+    was switched 'off' as opposed to being explicitly disabled.

+

+Version 1.6.3beta02 [April 26, 2013]

+  Test for 'arm*' not just 'arm' in the host_cpu configure variable.

+  Rebuilt the configure scripts.

+

+Version 1.6.3beta03 [April 30, 2013]

+  Expanded manual paragraph about writing private chunks, particularly

+    the need to call png_set_keep_unknown_chunks() when writing them.

+  Avoid dereferencing NULL pointer possibly returned from

+     png_create_write_struct() (Andrew Church).

+

+Version 1.6.3beta05 [May 9, 2013]

+  Calculate our own zlib windowBits when decoding rather than trusting the

+    CMF bytes in the PNG datastream.

+  Added an option to force maximum window size for inflating, which was

+    the behavior of libpng15 and earlier.

+  Added png-fix-itxt and png-fix-too-far-back to the built programs and

+    removed warnings from the source code and timepng that are revealed as

+    a result.

+  Detect wrong libpng versions linked to png-fix-too-far-back, which currently

+    only works with libpng versions that can be made to reliably fail when

+    the deflate data contains an out-of-window reference.  This means only

+    1.6 and later.

+  Fixed gnu issues: g++ needs a static_cast, gcc 4.4.7 has a broken warning

+    message which it is easier to work round than ignore.

+  Updated contrib/pngminus/pnm2png.c (Paul Stewart):

+    Check for EOF

+    Ignore "#" delimited comments in input file to pnm2png.c.

+    Fixed whitespace handling

+    Added a call to png_set_packing()

+    Initialize dimension values so if sscanf fails at least we have known

+      invalid values.

+  Attempt to detect configuration issues with png-fix-too-far-back, which

+    requires both the correct libpng and the correct zlib to function

+    correctly.

+  Check ZLIB_VERNUM for mismatches, enclose #error in quotes

+  Added information in the documentation about problems with and fixes for

+    the bad CRC and bad iTXt chunk situations.

+

+Version 1.6.3beta06 [May 12, 2013]

+  Allow contrib/pngminus/pnm2png.c to compile without WRITE_INVERT and

+    WRITE_PACK supported (writes error message that it can't read P1 or

+    P4 PBM files).

+  Improved png-fix-too-far-back usage message, added --suffix option.

+  Revised contrib/pngminim/*/makefile to generate pnglibconf.h with the

+    right zlib header files.

+  Separated CPPFLAGS and CFLAGS in contrib/pngminim/*/makefile

+

+Version 1.6.3beta07 [June 8, 2013]

+  Removed a redundant test in png_set_IHDR().

+  Added set(CMAKE_CONFIGURATION_TYPES ...) to CMakeLists.txt (Andrew Hundt)

+  Deleted set(CMAKE_BUILD_TYPE) block from CMakeLists.txt

+  Enclose the prototypes for the simplified write API in

+    #ifdef PNG_STDIO_SUPPORTED/#endif

+  Make ARM NEON support work at compile time (not just configure time).

+    This moves the test on __ARM_NEON__ into pngconf.h to avoid issues when

+    using a compiler that compiles for multiple architectures at one time.

+  Removed PNG_FILTER_OPTIMIZATIONS and PNG_ARM_NEON_SUPPORTED from

+    pnglibconf.h, allowing more of the decisions to be made internally

+    (pngpriv.h) during the compile.  Without this, symbol prefixing is broken

+    under certain circumstances on ARM platforms.  Now only the API parts of

+    the optimizations ('check' vs 'api') are exposed in the public header files

+    except that the new setting PNG_ARM_NEON_OPT documents how libpng makes the

+    decision about whether or not to use the optimizations.

+  Protect symbol prefixing against CC/CPPFLAGS/CFLAGS useage.

+    Previous iOS/Xcode fixes for the ARM NEON optimizations moved the test

+    on __ARM_NEON__ from configure time to compile time.  This breaks symbol

+    prefixing because the definition of the special png_init_filter_functions

+    call was hidden at configure time if the relevant compiler arguments are

+    passed in CFLAGS as opposed to CC.  This change attempts to avoid all

+    the confusion that would result by declaring the init function even when

+    it is not used, so that it will always get prefixed.

+

+Version 1.6.3beta08 [June 18, 2013]

+  Revised libpng.3 so that "doclifter" can process it.

+

+Version 1.6.3beta09 [June 27, 2013]

+  Revised example.c to illustrate use of PNG_DEFAULT_sRGB and PNG_GAMMA_MAC_18

+    as parameters for png_set_gamma().  These have been available since

+    libpng-1.5.4.

+  Renamed contrib/tools/png-fix-too-far-back.c to pngfix.c and revised it

+    to check all compressed chunks known to libpng.

+

+Version 1.6.3beta10 [July 5, 2013]

+  Updated documentation to show default behavior of benign errors correctly.

+  Only compile ARM code when PNG_READ_SUPPORTED is defined.

+  Fixed undefined behavior in contrib/tools/pngfix.c and added new strip

+    option. pngfix relied on undefined behavior and even a simple change from

+    gcc to g++ caused it to fail.  The new strip option 'unsafe' has been

+    implemented and is the default if --max is given.  Option names have

+    been clarified, with --strip=transform now stripping the bKGD chunk,

+    which was stripped previously with --strip=unused.

+  Added all documented chunk types to pngpriv.h

+  Unified pngfix.c source with libpng17.

+

+Version 1.6.3rc01 [July 11, 2013]

+  No changes.

+

+Version 1.6.3 [July 18, 2013]

+  Revised manual about changes in iTXt chunk handling made in libpng-1.6.0.

+  Added "/* SAFE */" comments in pngrutil.c and pngrtran.c where warnings

+    may be erroneously issued by code-checking applications.

+

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