version 1.2.42beta01 [December 4, 2009]
Removed "#define PNG_NO_ERROR_NUMBERS" that was inadvertently added
to pngconf.h in version 1.2.41.
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/libpng12 instead of in
$prefix/include/libpng/libpng12.
Removed leftover "-DPNG_CONFIGURE_LIBPNG" from scripts/makefile.darwin
version 1.2.42beta02 [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 1.2.42rc01 [December 17, 2009]
No changes.
version 1.2.42rc02 [December 22, 2009]
Renamed libpng-pc.in back to libpng.pc.in and revised CMakeLists.txt
(revising changes made in 1.2.41beta17 and 1.2.41rc01)
version 1.2.42rc03 [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 1.2.42rc04 [January 1, 2010]
Marked png_memcpy_check() and png_memset_check() PNG_DEPRECATED.
Updated copyright year.
version 1.2.42rc05 [January 2, 2010]
Avoid deprecated references to png_ptr-io_ptr and png_ptr->error_ptr
in pngtest.c
version 1.2.42 and 1.0.52 [January 3, 2010]
No changes.
version 1.2.43beta01 [January 27, 2010]
Updated CMakeLists.txt for consistent indentation and to avoid an
unclosed if-statement warning (Philip Lowman).
Removed "#ifdef PNG_1_0_X / #endif" surrounding
PNG_READ_16_TO_8_SUPPORTED and PNG_READ_GRAY_TO_RGB_SUPPORTED
in pngconf.h. These were added in libpng-1.2.41beta08 and libpng-1.0.51,
which introduced a binary incompatibility with libpng-1.0.50.
Backported new png_decompress_chunk() algorithm from libpng-1.4.1.
version 1.2.43beta02 [February 1, 2010]
Backported two-pass png_decompress_chunk() algorithm from libpng-1.4.1.
version 1.2.43beta03 [February 6, 2010]
Backported fast png_push_save_buffer() algorithm from libpng-1.4.1.
Backported some cosmetic changes from libpng-1.4.1.
version 1.2.43beta04 [February 8, 2010]
Reverted recent changes to png_push_save-buffer().
Removed PNGAPI declaration of png_calloc() and png_write_sig() in
1ibpng-1.2.X, introduced by mistake in libpng-1.2.41.
Return allocated "old_buffer" in png_push_save_buffer() before png_error()
to avoid a potential memory leak.
version 1.2.43beta05 [February 8, 2010]
Ported rewritten png_decompress_chunk() by John Bowler from libpng-1.4.1.
version 1.0.53rc01 and 1.2.43rc01 [February 18, 2010]
No changes.
version 1.0.53rc02 and 1.2.43rc02 [February 19, 2010]
Define _ALL_SOURCE in configure.ac, makefile.aix, and CMakeLists.txt
when using AIX compiler.
version 1.0.53 and 1.2.43 [February 25, 2010]
Removed unused gzio.c from contrib/pngminim gather and makefile scripts
version 1.2.41beta01 [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
Expanded TAB characters in pngrtran.c
version 1.2.41beta02 [September 30, 2009]
Revised png_check_IHDR().
version 1.2.41beta03 [October 1, 2009]
Revised png_check_IHDR() again, to check info_ptr members instead of
the contents of the returned parameters.
version 1.2.41beta04 [October 7, 2009]
Added "xcode" project similar one already in libpng-1.4.0beta (Alam Arias).
Ported some cosmetic changes from libpng-1.4.0beta86.
Eliminated a shadowed declaration of "pp" in png_handle_sPLT().
version 1.2.41beta05 [October 17, 2009]
Revised pngconf.h to make it easier to enable iTXt support. From libpng
version 1.2.9 through 1.2.40, defining PNG_iTXt_SUPPORTED did not work
as expected.
Ported some cosmetic changes from libpng-1.4.0beta87, changing
many "#if defined(x)" to "#ifdef x".
version 1.2.41beta06 [October 18, 2009]
Restored PNG_USE_LOCAL_ARRAYS code in pngread.c that was inadvertently
deleted in libpng-1.2.41beta05.
Converted all PNG_NO_* tests to PNG_*_SUPPORTED everywhere except pngconf.h
as in libpng-1.4.0beta78 and later.
version 1.2.41beta07 [October 21, 2009]
Ported some cosmetic changes from libpng-1.4.0rc01, changing
many "#if defined(x)" to "#ifdef x" in png.h and pngconf.h.
version 1.2.41beta08 [October 30, 2009]
Ported from libpng-1.4.0rc01: png_calloc(), png_get_io_chunk_name(),
png_get_io_state(), png_set_user_cache_max(), png_get_user_cache_max(),
png_set_premultiply_alpha, and png_do_read_premultiply_alpha().
Relocated png_do_chop() ahead of building gamma tables in pngrtran.c
This avoids building 16-bit gamma tables unnecessarily.
version 1.2.41beta09 [November 1, 2009]
Removed a harmless extra png_set_invert_alpha() from pngwrite.c
More bugfixes and improvements to CMakeLists.txt (Philip Lowman)
Moved CMakeLists.txt from scripts into the main libpng directory.
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 1.2.41beta10 [November 1, 2009]
Enabled iTXt support by default. To ensure binary compatibility with
previous versions, the "lang" and "lang_key" members will be assumed
to be omitted from previous versions unless the current libpng
version was built with PNG_iTXt_SUPPORTED (which is otherwise no
longer necessary to gain iTXt support), as a signal that the user has
been building previous versions with PNG_iTXt_SUPPORTED as well.
version 1.2.41beta11 [November 2, 2009]
Store user's user_png_ver in new png_ptr->user_png_ver element.
Revised iTXt support. To ensure binary compatibility with
previous versions, the "lang" and "lang_key" members will be assumed
to be omitted from versions prior to 1.2.41beta11 whenever there is a
library mismatch.
version 1.2.41beta12 [November 2, 2009]
Free png_ptr->user_png_ver when destroying png_ptr.
version 1.2.41beta13 [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 1.2.41beta14 [November 8, 2009]
versions 1.2.41beta05 through 1.2.41beta13 were abandoned.
The 1.0.x/1.2.x series will only receive security updates from now on.
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
Reverted iTXt compatibility stuff from 1.2.41beta05, 1.2.41beta11, and
1.2.41beta12.
Reverted IOSTATE feature, user_cache_max, and premultiply_alpha features
from 1.2.41beta08.
Retained png_calloc() from 1.2.41beta08 but as a non-exported function,
and removed reference to png_calloc from scripts/*.def
version 1.2.41beta15 [November 8, 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".
version 1.2.41beta16 [November 9, 2009]
Removed three direct references to read_info_ptr members in pngtest.c
that were detected by the new PNG_DEPSTRUCT macro.
Only #define PNG_DEPSTRUCT, etc. in pngconf.h if not already defined.
version 1.2.41beta17 [November 10, 2009]
Updated CMakeLists.txt to add "-DPNG_CONFIGURE_LIBPNG" to the definitions.
Marked deprecated function prototypes with PNG_DEPRECATED.
Marked memory allocation function prototypes with PNG_ALLOCATED.
Changed png_check_sig() to !png_sig_cmp() in contrib programs.
Corrected the png_get_IHDR() call in contrib/gregbook/readpng2.c
Added "-DPNG_CONFIGURE_LIBPNG" to the contrib/pngminum makefiles.
version 1.2.41beta18 [November 11, 2009]
Renamed scripts/makefile.wce to scripts/makefile.cegcc
Marked nonexported functions with PNG_PRIVATE macro.
version 1.2.41rc01 and 1.0.51rc01 [November 18, 2009]
Revised scripts/*.def to reflect functions actually exported by libpng.
Updated the copyright year in scripts/pngw32.rc from 2004 to 2009.
Moved descriptions of makefiles and other scripts out of INSTALL into
scripts/README.txt
version 1.2.41rc02 [November 22, 2009]
Rebuilt the configure scripts with autoconf-2.65
version 1.2.41rc03 [November 25, 2009]
Disabled the new pedantic warnings about deprecated function use
and deprecated structure access unless the user defines
PNG_PEDANTIC_WARNINGS.
Added "#define PNG_NO_PEDANTIC_WARNINGS" in the libpng source files.
Removed "-DPNG_CONFIGURE_LIBPNG" from the makefiles and projects.
version 1.2.41 [December 3, 2009]
Updated the list of files and made some cosmetic changes in README.
version 1.2.40beta01 [August 20, 2009]
Removed an extra png_debug() recently added to png_write_find_filter().
Fixed incorrect #ifdef in pngset.c regarding unknown chunk support.
version 1.2.40rc01 [September 2, 2009]
Various bugfixes and improvements to CMakeLists.txt (Philip Lowman)
version 1.2.40 and 1.0.49 [September 10, 2009]
No changes.
version 1.2.39beta01 [July 25, 2009]
Added a prototype for png_64bit_product() in png.c
version 1.2.39beta02 [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 1.2.39beta03 [July 29, 2009]
Relocated new png_64_bit_product() prototype into png.h
Expanded the information about prototypes in the libpng style section of
the documentation.
Rebuilt configure scripts with autoconf-2.64.
version 1.2.39beta04 [August 1, 2009]
Replaced *.tar.lzma with *.txz in distribution. Get the xz codec
from <http://tukaani.org/xz>.
version 1.2.39beta05 [August 1, 2009]
Reject attempt to write iCCP chunk with negative embedded profile length
(JD Chen)
version 1.2.39c01 [August 6, 2009]
No changes.
version 1.2.39 and 1.0.48 [August 13, 2009]
No changes.
version 1.2.38beta01 [June 17, 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.
Added PNG_NO_HANDLE_AS_UNKNOWN in the PNG_LEGACY_SUPPORTED block of
pngconf.h, and moved the various unknown chunk macro definitions
outside of the PNG_READ|WRITE_ANCILLARY_CHUNK_SUPPORTED blocks.
version 1.2.38rc01 [June 24, 2009]
No changes.
version 1.2.38rc02 [June 29, 2009]
Added a reference to the libpng license in each source file.
version 1.2.38rc03 [July 11, 2009]
Revised references to the libpng license in pngconf.h and contrib/visupng
source files.
Rebuilt configure scripts with autoconf-2.63.
version 1.0.47 and 1.2.38 [July 16, 2009]
No changes.
version 1.2.37beta01 [May 14, 2009]
Fixed inconsistency in pngrutil.c, introduced in libpng-1.2.36. The
memset() was using "png_ptr->rowbytes" instead of "row_bytes", which
the corresponding png_malloc() uses (Joe Drew).
Clarified usage of sig_bit versus sig_bit_p in example.c (Vincent Torri)
Updated some of the makefiles in the scripts directory (merged with
those in libpng-1.4.0beta57).
version 1.2.37beta02 [May 19, 2009]
Fixed typo in libpng documentation (FILTER_AVE should be FILTER_AVG)
Relocated misplaced #endif in pngwrite.c, sCAL chunk handler.
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 1.2.37beta03 [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.
Reformated sources in libpng style (3-space indentation, comment format)
version 1.2.37rc01 [May 27, 2009]
No changes.
versions 1.2.37 and 1.0.45 [June 4, 2009]
Reformatted several remaining "else statement;" and "if () statment;" into
two lines.
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
Added sections about the git repository and our coding style to the
documentation (merged from libpng-1.4.0beta62)
Added a section about using png_get_io_ptr() in configure scripts to detect
the presence of libpng.
version 1.2.36beta01 [February 28, 2009]
Revised comments in png_set_read_fn() and png_set_write_fn().
Revised order of #ifdef's and indentation in png_debug definitions of png.h
bug introduced in libpng-1.2.34.
version 1.2.36beta02 [March 21, 2009]
Use png_memset() after png_malloc() of big_row_buf when reading an
interlaced file, to avoid a possible UMR.
Undid recent revision of PNG_NO_STDIO version of png_write_flush(). Users
having trouble with fflush() can build with PNG_NO_WRITE_FLUSH defined.
Revised libpng*.txt documentation about use of png_write_flush().
Removed fflush() from pngtest.c.
Added "#define PNG_NO_WRITE_FLUSH" to contrib/pngminim/encoder/pngusr.h
version 1.2.36beta03 [March 27, 2009]
Relocated misplaced PNG_1_0_X define in png.h that caused the prototype
for png_set_strip_error_numbers() to be omitted from PNG_NO_ASSEMBLER_CODE
builds. This bug was introduced in libpng-1.2.15beta4.
Added a section on differences between 1.0.x and 1.2.x to libpng.3/libpng.txt
version 1.2.36beta04 [April 5, 2009]
Fixed potential memory leak of "new_name" in png_write_iCCP() (Ralph Giles)
version 1.2.36beta05 [April 24, 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.
Made some cosmetic changes to whitespace in pngtest output.
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 1.2.36rc01 [April 30, 2009]
No changes.
version 1.0.44 and 1.2.36 [May 7, 2009]
No changes.
This changes the buildlink3.mk files to use an include guard for the
recursive include. The use of BUILDLINK_DEPTH, BUILDLINK_DEPENDS,
BUILDLINK_PACKAGES and BUILDLINK_ORDER is handled by a single new
variable BUILDLINK_TREE. Each buildlink3.mk file adds a pair of
enter/exit marker, which can be used to reconstruct the tree and
to determine first level includes. Avoiding := for large variables
(BUILDLINK_ORDER) speeds up parse time as += has linear complexity.
The include guard reduces system time by avoiding reading files over and
over again. For complex packages this reduces both %user and %sys time to
half of the former time.
version 1.2.34beta01 [November 27, 2008]
Revised png_warning() to write its message on standard output by default
when warning_fn is NULL. This was the behavior prior to libpng-1.2.9beta9.
Fixed string vs pointer-to-string error in png_check_keyword().
Added png_check_cHRM_fixed() in png.c and moved checking from pngget.c,
pngrutil.c, and pngwrite.c, and eliminated floating point cHRM checking.
Added check for zero-area RGB cHRM triangle in 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.
Revised png_warning() to write its message on standard output by default
when warning_fn is NULL.
version 1.2.34beta02 [November 28, 2008]
Corrected off-by-one error in bKGD validity check in png_write_bKGD()
and in png_handle_bKGD().
version 1.2.34beta03 [December 1, 2008]
Revised bKGD validity check to use >= x instead of > x + 1
Merged with png_debug from libpng-1.4.0 to remove newlines.
version 1.2.34beta04 [December 2, 2008]
More merging with png_debug from libpng-1.4.0 to remove newlines.
version 1.2.34beta05 [December 5, 2008]
Removed redundant check for key==NULL before calling png_check_keyword()
to ensure that new_key gets initialized and removed extra warning
(Arvan Pritchard).
version 1.2.34beta06 [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 1.2.34beta07 [December 9, 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 1.0.42rc01, 1.2.34rc01 [December 11, 2008]
No changes.
version 1.0.42, 1.2.34 [December 18, 2008]
No changes.
version 1.2.33beta01 [October 6, 2008]
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 1.2.33rc01 [October 15, 2008]
No changes.
version 1.2.33rc02 [October 23, 2008]
Changed remaining "key" to "png_ptr->chunkdata" in png_handle_tEXt()
to avoid memory leak after memory failure while reading tEXt chunk.`
version 1.2.31rc01 [August 19, 2008]
Removed extra crc check at the end of png_handle_cHRM(). Bug introduced
in libpng-1.2.30beta03 (Heiko Nitzsche).
version 1.2.31rc02 [August 19, 2008]
Added PNG_WRITE_FLUSH_SUPPORTED block around new png_flush() call.
version 1.2.31rc03 [August 19, 2008]
Added PNG_WRITE_FLUSH_AFTER_IEND_SUPPORTED block, off by default, around
new png_flush().
version 1.0.39, 1.2.31 [August 21, 2008]
No changes.
Thanks to Rumko.
version 1.2.30beta01 [May 29, 2008]
Updated libpng.pc-configure.in and libpng-config.in per debian bug reports.
version 1.2.30beta02 [June 25, 2008]
Restored png_flush(png_ptr) at the end of png_write_end(), that was
removed from libpng-1.0.9beta03.
version 1.2.30beta03 [July 6, 2008]
Merged some cosmetic whitespace changes from libpng-1.4.0beta19.
Inline call of png_get_uint_32() in png_get_uint_31(), as in 1.4.0beta19.
Added demo of decoding vpAg and sTER chunks to pngtest.c, from 1.4.0beta19.
Changed PNGMAJ from 0 to 12 in makefile.darwin, which does not like 0.
Added new private function png_read_chunk_header() from 1.4.0beta19.
Merge reading of chunk length and chunk type into a single 8-byte read.
Merge writing of chunk length and chunk type into a single 8-byte write.
version 1.2.30beta04 [July 10, 2008]
Merged more cosmetic whitespace changes from libpng-1.4.0beta19.
version 1.0.38rc01, 1.2.30rc01 [August 15, 2008]
No changes.
version 1.0.38rc02, 1.2.30rc02 [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 1.0.38rc03, 1.2.30rc03 [July 21, 2008]
Changed "purpose" and "buffer" to png_ptr->chunkdata to avoid memory leaking.
version 1.0.38rc04, 1.2.30rc04 [July 22, 2008]
Changed "chunkdata = NULL" to "png_ptr->chunkdata = NULL" several places in
png_decompress_chunk().
version 1.0.38rc05, 1.2.30rc05 [July 25, 2008]
Changed 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.
version 1.0.38rc06, 1.2.30rc06 [July 29, 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.
version 1.0.38r07, 1.2.30r07 [August 2, 2008]
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.
Added code in pngset.c to quiet compiler warnings.
Updated contrib/visupng/cexcept.h to version 2.0.1
Relocated a misplaced "#endif /* PNG_NO_WRITE_FILTER */" in pngwutil.c
version 1.0.38r08, 1.2.30r08 [August 2, 2008]
Enclose "volatile" declarations in #ifdef PNG_SETJMP_SUPPORTED (Cosmin).
version 1.0.38, 1.2.30 [August 15, 2008]
No changes.
version 1.2.27beta04 [April 18, 2008]
Added AC_LIBTOOL_WIN32_DLL to configure.ac
Rebuilt Makefile.in, aclocal.m4, and configure with autoconf-2.62
version 1.2.27beta05 [April 19, 2008]
Added MAINTEINERCLEANFILES variable to Makefile.am
version 1.2.27beta06 [April 21, 2008]
Avoid changing color_type from GRAY to RGB by
png_set_expand_gray_1_2_4_to_8().
version 1.2.27rc01 [April 23, 2008]
Fix broken URL for rfc2083 in png.5 and libpng-*.txt
version 1.0.33 and 1.2.27 [April 30, 2008]
No changes.
version 1.0.34 and 1.2.28 [April 30, 2008]
Rebuilt Makefile.in, aclocal.m4, and configure with autoconf-2.61
due to backward incompatibilities.
Removed a stray object file from contrib/gregbook
version 1.2.29beta01 [May 1, 2008]
Removed some stray *.diff and *.orig files
version 1.2.29beta02 [May 1, 2008]
Reverted Makefile.in, aclocal.m4, and configure to the libpng-1.2.26
versions.
version 1.2.29beta03 [May 2, 2008]
Added --force to autogen libtoolize options and --force-missing to
automake options.
Changed $(ECHO) to echo in Makefile.am and Makefile.in
Updated all configure files to autoconf-2.62
#ifdef out pnggcrd.c code if using MSC_VER
version 1.2.29rc01 [May 4, 2008]
No changes.
version 1.0.35 and 1.2.29 [May 8, 2008]
No changes.
See http://libpng.sourceforge.net/Advisory-1.2.26.txt for details.
Changes since 1.2.26:
version 1.2.27beta01 [April 12, 2008]
Fixed bug (introduced in libpng-1.0.5h) with handling zero-length
unknown chunks.
Added more information about png_set_keep_unknown_chunks() to the
documetation.
Reject tRNS chunk with out-of-range samples instead of masking off
the invalid high bits as done in since libpng-1.2.19beta5.
version 1.2.27beta02 [April 13, 2008]
Revised documentation about unknown chunk and user chunk handling.
Keep tRNS chunk with out-of-range samples and issue a png_warning().
version 1.2.27beta03 [April 14, 2008]
Added check for NULL ptr in TURBOC version of png_free_default().
Removed several unnecessary checks for NULL before calling png_free().
Revised png_set_tRNS() so that calling it twice removes and invalidates
the previous call.
Revised pngtest to check for out-of-range tRNS samples.
version 1.2.26beta01 [February 21, 2008]
Added missing "(" in pngmem.c. Bug introduced in libpng-1.2.2/1.0.13
version 1.2.26beta02 [March 12, 2008]
Refined error message returned from deflateInit2 in pngwutil.c
Check IHDR length in png_push_read_chunk() before saving it.
version 1.2.26beta03 [March 16, 2008]
Revised contrib/gregbook to handle premature end-of-file and file
read errors correctly.
version 1.2.26beta04 [March 18, 2008]
Free png_ptr->big_row_buf and png_ptr->prev_row before allocating
new copies in png_read_start_row(). Bug introduced in libpng-1.2.22.
version 1.2.26beta05 [March 19, 2008]
Removed extra png_free() added in libpng-1.2.26beta04.
version 1.2.26beta06 [March 19, 2008]
Avoid reallocating big_row_buf and prev_row when the size does not increase.
version 1.2.26rc01 [April 2, 2008]
Ifdef out some code that is unused when interlacing is not supported.
version 1.2.24beta01 [November 19, 2007]
Moved misplaced test for malloc failure in png_set_sPLT(). This bug was
introduced in libpng-1.2.20beta01.
Ifdef out avg_row etc from png.h and pngwrite.c when PNG_NO_WRITE_FILTER
Do not use png_ptr->free_fn and png_ptr->mem_fn in png_destroy_read_struct()
when png_ptr is NULL (Marshall Clow).
Updated handling of symbol prefixes in Makefile.am and configure.ac (Mike
Frysinger).
version 1.2.24beta02 [November 30, 2007]
Removed a useless test and fixed incorrect test in png_set_cHRM_fixed()
(David Hill).
version 1.2.24rc01 [December 7, 2007]
No changes.
version 1.2.24 [December 14, 2007]
Make sure not to redefine _BSD_SOURCE in pngconf.h
Revised gather.sh and makefile.std in contrib/pngminim to avoid compiling
unused files.
version 1.2.23beta01 [October 15, 2007]
Reduced number of invocations of png_strlen() in pngset.c.
Changed [azAZ09_] to [_abcde...89] in Makefile.am for better localization.
version 1.2.23beta02 [October 16, 2007]
Eliminated png_strncpy() and png_strcpy() (Pierre Poissinger)
Changed $AN to $(AN) in Makefile.am.
version 1.2.23beta03 [October 16, 2007]
Fixed off-by-one error in pngset.c
Restore statement to set last character of buffer to \0 in pngerror.c
version 1.2.23beta04 [October 23, 2007]
Reject attempt to set all-zero cHRM values.
version 1.2.23beta05 [October 26, 2007]
Add missing quotes in projects/visualc6, lost in version 1.2.20rc3
version 1.2.23rc01 [November 2, 2007]
No changes.
version 1.2.23 [November 6, 2007]
No changes.
-DPNG_NO_ASSEMBLER_CODE. Bump rev. I've tested png on NetBSD/amd64
with the assembler code and it seems no less functional than NetBSD/i386.
ok'd weeks ago (before freeze)--I forgot to commit it.
version 1.2.21beta1 [September 14, 2007]
Fixed various mistakes reported by George Cook and Jeff Phillips:
logical vs bitwise NOT in pngrtran.c, bug introduced in 1.2.19rc2
16-bit cheap transparency expansion, bug introduced in 1.2.19beta2
errors with sizeof(unknown_chunk.name), bugs introduced in 1.2.19beta11
<= compare with unsigned var in pngset.c, should be ==.
version 1.2.21beta2 [September 18, 2007]
Removed some extraneous typecasts.
version 1.2.21rc1 [September 25, 2007]
Fixed potential out-of-bounds reads in png_handle_pCAL() and
png_handle_ztXt() ("flayer" results reported by Tavis Ormandy).
version 1.2.21rc2 [September 26, 2007]
Fixed potential out-of-bounds reads in png_handle_sCAL(),
png_handle_iTXt(), and png_push_read_tEXt().
Remove some PNG_CONST declarations from pngwutil.c to avoid compiler warnings
Revised makefiles to update paths in libpng.pc properly.
version 1.2.21rc3 [September 27, 2007]
Revised makefiles to update "Libs" in libpng.pc properly.
version 1.0.29 and 1.2.21 [October 4, 2007]
No changes.
version 1.2.22beta1 [October 4, 2007]
Again, fixed logical vs bitwise NOT in pngrtran.c, bug introduced
in 1.2.19rc2
version 1.2.22beta2 [October 5, 2007]
Fixed string length error in pngset.c (caused crashes while decoding iCCP)
Add terminating NULL after each instance of png_strncpy().
version 1.2.22beta3 [October 6, 2007]
Fix two off-by-one terminating NULL after png_strncpy().
version 1.2.22beta4 [October 7, 2007]
Changed some 0 to '\0'.
version 1.0.30rc1 and 1.2.22rc1 [October 8, 2007]
No changes.
version 1.0.30 and 1.2.22 [October 13, 2007]
No changes.
version 1.2.20beta01 [August 19, 2007]
Fixed problem with compiling pnggccrd.c on Intel-Apple platforms.
Added PNG_NO_ERROR_TEXT feature, with demo in contrib/pngminim
Removed define PNG_WARN_UNINITIALIZED_ROW 1 /* 0: warning; 1: error */
because it caused some trouble.
version 1.2.20beta02 [August 20, 2007]
Avoid compiling pnggccrd.c on Intel-Apple platforms.
version 1.2.20beta03 [August 20, 2007]
Added "/D PNG_NO_MMX_CODE" to the non-mmx builds of projects/visualc6
and visualc71.
version 1.2.20beta04 [August 21, 2007]
Revised pngvcrd.c for improved efficiency (Steve Snyder).
version 1.2.20rc1 [August 23, 2007]
Revised pngconf.h to set PNG_NO_MMX_CODE for gcc-3.x compilers.
version 1.2.20rc2 [August 27, 2007]
Revised scripts/CMakeLists.txt
Revised #ifdefs to ensure one and only one of pnggccrd.c, pngvcrd.c,
or part of pngrutil.c is selected.
version 1.2.20rc3 [August 30, 2007]
Remove a little more code in pngwutil.c when PNG_NO_WRITE_FILTER is selected.
Added /D _CRT_SECURE_NO_WARNINGS to visual6c and visualc71 projects.
Compile png_mmx_support() in png.c even when PNG_NO_MMX_CODE is defined.
Restored a "superfluous" #ifdef that was removed from 1.2.20rc2 pnggccrd.c,
breaking the png_mmx_support() function.
version 1.2.20rc4 [September 1, 2007]
Removed Intel contributions (MMX, Optimized C).
version 1.2.20rc5 [September 2, 2007]
Restored configure and Makefile.in to rc3 and put a snippet of code in
pnggccrd.c, to ensure configure makes the same PNG_NO_MMX_CODE selection
version 1.2.20rc6 [September 2, 2007]
Fixed bugs in scripts/CMakeLists.txt
Removed pngvcrd.c references from msvc projects.
version 1.0.28 and 1.2.20 [September 8, 2007]
Removed "(NO READ SUPPORT)" from png_get_header_version() string.
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 1.2.19beta11 [May 28, 2007]
Return 0 from png_get_sPLT() and png_get_unknown_chunks() if png_ptr is NULL;
changed three remaining instances of png_strcpy() to png_strncpy() (David
Hill).
Make test for NULL row_buf at the beginning of png_do_read_transformations
unconditional.
version 1.2.19beta12 [May 28, 2007]
Revised pnggccrd.c.
version 1.2.19beta13 [June 14, 2007]
Prefer PNG_USE_PNGVCRD when _MSC_VER is defined in pngconf.h
version 1.2.19beta14 [June 16, 2007]
Fix bug with handling of 16-bit transparency, introduced in 1.2.19beta2
version 1.2.19beta15 [June 17, 2007]
Revised pnggccrd.c.
version 1.2.19beta16 [June 18, 2007]
Revised pnggccrd.c again.
Updated contrib/gregbook.
Changed '#include "pnggccrd.c"' to 'include "$srcdir/pnggccrd.c"'
in configure.ac
version 1.2.19beta17 [June 19, 2007]
Revised many of the makefiles, to set -DPNG_NO_MMX_CODE where needed
and to not use -O3 unless -DPNG_NO_MMX_CODE is also set.
version 1.2.19beta18 [June 23, 2007]
Replaced some C++ style comments with C style comments in pnggccrd.c.
Copied optimized C code from pnggccrd.c to pngrutil.c, removed dependency
on pnggccrd.o from many makefiles.
Added sl and dylib to list of extensions be installed by Makefile.am
version 1.2.19beta19 [June 28, 2007]
Fixed testing PNG_RGB_TO_GRAY_ERR & PNG_RGB_TO_GRAY_WARN in pngrtran.c
More cleanup of pnggccrd.c and pngvcrd.c
version 1.2.19beta20 [June 29, 2007]
Rebuilt Makefile.in and configure using libtool-1.5.24.
Fixed typo in pnggccrd.c
version 1.2.19beta21 [June 30, 2007]
More revision of pnggccrd.c
Added "test" target to Makefile.in and Makefile.am
version 1.2.19beta22 [July 3, 2007]
Added info about pngrutil/pnggccrd/pngvcrd to png_get_header_version()
Fix type definition of dummy_value_a, b in pnggccrd.c
version 1.2.19beta23 [July 10, 2007]
Revert change to type definition of dummy_value_a, b in pnggccrd.c
Make sure __PIC__ is defined in pnggccrd.c when PIC is defined.
Require gcc-4.1 or better to use PNG_HAVE_MMX_FILTER_ROW on x86_64 platforms
version 1.2.19beta24 [July 14, 2007]
Added PNG_NO_READ_FILTER, PNG_NO_WRITE_FILTER, PNG_NO_WARNING macros.
Added contrib/pngminim to demonstrate building minimal encoder and decoder
version 1.2.19beta25 [July 15, 2007]
Removed the new PNG_NO_READ_FILTER macro since it would make the library
unable to read valid PNG files, and filtering is at the heart of the
PNG format.
version 1.2.19beta26 [July 16, 2007]
Changed "png_free(str)" to "png_free(png_ptr,str)" in pngrutil.c WinCE
code (Yves Piguet). This bug was introduced in libpng-1.2.14.
Updated scripts/CMakeLists.txt
Relocated a misplaced #endif in pnggccrd.c
version 1.2.19beta27 [July 17, 2007]
Fixed incorrect stride and number of bytes copied (was 4 instead of
6 bytes) in the cleanup loop of pnggccrd.c and pngvcrd.c for handling
the end of 48-bit interlaced rows (Glenn R-P).
version 1.2.19beta28 [July 19, 2007]
Removed requirement for gcc-4.1 or better to use PNG_HAVE_MMX_FILTER_ROW
on x86_64 platforms
Added png_warning() in pngrutil.c for short iCCP, iTXt, sPLT, or zTXT chunks.
Revised pngtest.c so warnings are displayed regardless of PNG_NO_STDIO.
version 1.2.19beta29 [July 20, 2007]
Fix typo in pnggccrd.c (%%eax should be %%ax in secondloop48)
version 1.2.19beta30 [July 26, 2007]
Revised pnggccrd.c
version 1.2.19beta31 [July 27, 2007]
Fix typos in pnggccrd.c
version 1.0.27rc1 and 1.2.19rc1 [July 31, 2007]
Disable PNG_MMX_CODE_SUPPORTED when PNG_ASSEMBLER_CODE_SUPPORTED is off.
Enable PNG_MMX_READ_FILTER_* by default, except when gcc-3.x is being
used (they were inadvertently disabled in libpng-1.2.19beta23).
Fix some debugging statements in pnggccrd.c and pngrutil.c
Added information about disabling the MMX code in libpng documentation.
version 1.0.27rc2 and 1.2.19rc2 [August 4, 2007]
Removed some "#if 0" blocks.
Made a global struct local in pngvcrd.c to make it thread safe.
Issue a png_error() if application attempts to transform a row tht
has not been initialized.
version 1.0.27rc3 and 1.2.19rc3 [August 9, 2007]
Slightly revised pngvcrd.c
version 1.0.27rc4 and 1.2.19rc4 [August 9, 2007]
Revised pnggccrd.c debugging change of rc1, which was broken.
Revised scripts/CMakeLists.txt
Change default to PNG_NO_GLOBAL_ARRAYS for MSVC.
Turn off PNG_FLAG_ROW_INIT flag when setting transforms that expand pixels.
version 1.0.27rc5 and 1.2.19rc5 [August 10, 2007]
Fix typo (missing '"') in pnggccrd.c
Revise handling of png_strtod in recent versions of WINCE
version 1.0.27rc6 and 1.2.19rc6 [August 15, 2007]
Fix typo (missing ',') in contrib/gregbook/readpng2.c
Undid row initialization error exit added to rc2 and rc4.
version 1.0.27 and 1.2.19 [August 18, 2007]
Conditionally restored row initialization error exit.
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 1.2.17 [May 15, 2007]
Added "png_ptr->num_trans=0" before error return in png_handle_tRNS,
to eliminate a vulnerability (CVE-2007-2554, CERT VU#684664)
version 1.2.18 [May 15, 2007]
Reverted the libpng-1.2.17rc3 change to symbol-handling in configure script
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 1.2.15beta1 [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 intruduced 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 1.2.13beta1 [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.
version 1.0.21, 1.2.13 [November 15, 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.
and add a new helper target and script, "show-buildlink3", that outputs
a listing of the buildlink3.mk files included as well as the depth at
which they are included.
For example, "make show-buildlink3" in fonts/Xft2 displays:
zlib
fontconfig
iconv
zlib
freetype2
expat
freetype2
Xrender
renderproto
