Alien-FreeImage
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src/Source/LibPNG/CHANGES view on Meta::CPAN
Changed several typedefs in pngrutil.c
Added makefile.wat (Pawel Mrochen), updated makefile.tc3 (Willem van Schaik)
Replaced "while(1)" with "for(;;)"
Added PNGARG() to prototypes in pngtest.c and removed some prototypes
Updated some of the makefiles (Tom Lane)
Changed some typedefs (s_start, etc.) in pngrutil.c
Fixed dimensions of "short_months" array in pngwrite.c
Replaced ansi2knr.c with the one from jpeg-v6
Version 1.0.0 [March 8, 1998]
Changed name from 1.00 to 1.0.0 (Adam Costello)
Added smakefile.ppc (with SCOPTIONS.ppc) for Amiga PPC (Andreas Kleinert)
Version 1.0.0a [March 9, 1998]
Fixed three bugs in pngrtran.c to make gamma+background handling consistent
(Greg Roelofs)
Changed format of the PNG_LIBPNG_VER integer to xyyzz instead of xyz
for major, minor, and bugfix releases. This is 10001. (Adam Costello,
Tom Lane)
Make months range from 1-12 in png_convert_to_rfc1123
Version 1.0.0b [March 13, 1998]
Quieted compiler complaints about two empty "for" loops in pngrutil.c
Minor changes to makefile.s2x
Removed #ifdef/#endif around a png_free() in pngread.c
Version 1.0.1 [March 14, 1998]
Changed makefile.s2x to reduce security risk of using a relative pathname
Fixed some typos in the documentation (Greg).
Fixed a problem with value of "channels" returned by png_read_update_info()
Version 1.0.1a [April 21, 1998]
Optimized Paeth calculations by replacing abs() function calls with intrinsics
plus other loop optimizations. Improves avg decoding speed by about 20%.
Commented out i386istic "align" compiler flags in makefile.lnx.
Reduced the default warning level in some makefiles, to make them consistent.
Removed references to IJG and JPEG in the ansi2knr.c copyright statement.
Fixed a bug in png_do_strip_filler with XXRRGGBB => RRGGBB transformation.
Added grayscale and 16-bit capability to png_do_read_filler().
Fixed a bug in pngset.c, introduced in version 0.99c, that sets rowbytes
too large when writing an image with bit_depth < 8 (Bob Dellaca).
Corrected some bugs in the experimental weighted filtering heuristics.
Moved a misplaced pngrutil code block that truncates tRNS if it has more
than num_palette entries -- test was done before num_palette was defined.
Fixed a png_convert_to_rfc1123() bug that converts day 31 to 0 (Steve Eddins).
Changed compiler flags in makefile.wat for better optimization
(Pawel Mrochen).
Version 1.0.1b [May 2, 1998]
Relocated png_do_gray_to_rgb() within png_do_read_transformations() (Greg).
Relocated the png_composite macros from pngrtran.c to png.h (Greg).
Added makefile.sco (contributed by Mike Hopkirk).
Fixed two bugs (missing definitions of "istop") introduced in libpng-1.0.1a.
Fixed a bug in pngrtran.c that would set channels=5 under some circumstances.
More work on the Paeth-filtering, achieving imperceptible speedup
(A Kleinert).
More work on loop optimization which may help when compiled with C++
compilers.
Added warnings when people try to use transforms they've defined out.
Collapsed 4 "i" and "c" loops into single "i" loops in pngrtran and pngwtran.
Revised paragraph about png_set_expand() in libpng.txt and libpng.3 (Greg)
Version 1.0.1c [May 11, 1998]
Fixed a bug in pngrtran.c (introduced in libpng-1.0.1a) where the masks for
filler bytes should have been 0xff instead of 0xf.
Added max_pixel_depth=32 in pngrutil.c when using FILLER with palette images.
Moved PNG_WRITE_WEIGHTED_FILTER_SUPPORTED and PNG_WRITE_FLUSH_SUPPORTED
out of the PNG_WRITE_TRANSFORMS_NOT_SUPPORTED block of pngconf.h
Added "PNG_NO_WRITE_TRANSFORMS" etc., as alternatives for *_NOT_SUPPORTED,
for consistency, in pngconf.h
Added individual "ifndef PNG_NO_[CAPABILITY]" in pngconf.h to make it easier
to remove unwanted capabilities via the compile line
Made some corrections to grammar (which, it's) in documentation (Greg).
Corrected example.c, use of row_pointers in png_write_image().
Version 1.0.1d [May 24, 1998]
Corrected several statements that used side effects illegally in pngrutil.c
and pngtrans.c, that were introduced in version 1.0.1b
Revised png_read_rows() to avoid repeated if-testing for NULL (A Kleinert)
More corrections to example.c, use of row_pointers in png_write_image()
and png_read_rows().
Added pngdll.mak and pngdef.pas to scripts directory, contributed by
Bob Dellaca, to make a png32bd.dll with Borland C++ 4.5
Fixed error in example.c with png_set_text: num_text is 3, not 2 (Guido V.)
Changed several loops from count-down to count-up, for consistency.
Version 1.0.1e [June 6, 1998]
Revised libpng.txt and libpng.3 description of png_set_read|write_fn(), and
added warnings when people try to set png_read_fn and png_write_fn in
the same structure.
Added a test such that png_do_gamma will be done when num_trans==0
for truecolor images that have defined a background. This corrects an
error that was introduced in libpng-0.90 that can cause gamma processing
to be skipped.
Added tests in png.h to include "trans" and "trans_values" in structures
when PNG_READ_BACKGROUND_SUPPORTED or PNG_READ_EXPAND_SUPPORTED is defined.
Add png_free(png_ptr->time_buffer) in png_destroy_read_struct()
Moved png_convert_to_rfc_1123() from pngwrite.c to png.c
Added capability for user-provided malloc_fn() and free_fn() functions,
and revised pngtest.c to demonstrate their use, replacing the
PNGTEST_DEBUG_MEM feature.
Added makefile.w32, for Microsoft C++ 4.0 and later (Tim Wegner).
Version 1.0.2 [June 14, 1998]
Fixed two bugs in makefile.bor .
Version 1.0.2a [December 30, 1998]
Replaced and extended code that was removed from png_set_filler() in 1.0.1a.
Fixed a bug in png_do_filler() that made it fail to write filler bytes in
the left-most pixel of each row (Kevin Bracey).
Changed "static pngcharp tIME_string" to "static char tIME_string[30]"
in pngtest.c (Duncan Simpson).
Fixed a bug in pngtest.c that caused pngtest to try to write a tIME chunk
even when no tIME chunk was present in the source file.
Fixed a problem in pngrutil.c: gray_to_rgb didn't always work with 16-bit.
Fixed a problem in png_read_push_finish_row(), which would not skip some
passes that it should skip, for images that are less than 3 pixels high.
Interchanged the order of calls to png_do_swap() and png_do_shift()
in pngwtran.c (John Cromer).
Added #ifdef PNG_DEBUG/#endif surrounding use of PNG_DEBUG in png.h .
Changed "bad adaptive filter type" from error to warning in pngrutil.c .
Fixed a documentation error about default filtering with 8-bit indexed-color.
Separated the PNG_NO_STDIO macro into PNG_NO_STDIO and PNG_NO_CONSOLE_IO
(L. Peter Deutsch).
Added png_set_rgb_to_gray() and png_get_rgb_to_gray_status() functions.
Added png_get_copyright() and png_get_header_version() functions.
Revised comments on png_set_progressive_read_fn() in libpng.txt and example.c
Added information about debugging in libpng.txt and libpng.3 .
Changed "ln -sf" to "ln -s -f" in makefile.s2x, makefile.lnx, and
makefile.sco.
Removed lines after Dynamic Dependencies" in makefile.aco .
Revised makefile.dec to make a shared library (Jeremie Petit).
Removed trailing blanks from all files.
Version 1.0.2a [January 6, 1999]
Removed misplaced #endif and #ifdef PNG_NO_EXTERN near the end of png.h
Added "if" tests to silence complaints about unused png_ptr in png.h and png.c
Changed "check_if_png" function in example.c to return true (nonzero) if PNG.
Changed libpng.txt to demonstrate png_sig_cmp() instead of png_check_sig()
which is obsolete.
Version 1.0.3 [January 14, 1999]
Added makefile.hux, for Hewlett Packard HPUX 10.20 and 11.00 (Jim Rice)
Added a statement of Y2K compliance in png.h, libpng.3, and Y2KINFO.
Version 1.0.3a [August 12, 1999]
Added check for PNG_READ_INTERLACE_SUPPORTED in pngread.c; issue a warning
if an attempt is made to read an interlaced image when it's not supported.
Added check if png_ptr->trans is defined before freeing it in pngread.c
Modified the Y2K statement to include versions back to version 0.71
Fixed a bug in the check for valid IHDR bit_depth/color_types in pngrutil.c
Modified makefile.wat (added -zp8 flag, ".symbolic", changed some comments)
Replaced leading blanks with tab characters in makefile.hux
Changed "dworkin.wustl.edu" to "ccrc.wustl.edu" in various documents.
Changed (float)red and (float)green to (double)red, (double)green
in png_set_rgb_to_gray() to avoid "promotion" problems in AIX.
Fixed a bug in pngconf.h that omitted <stdio.h> when PNG_DEBUG==0 (K Bracey).
Reformatted libpng.3 and libpngpf.3 with proper fonts (script by J. vanZandt).
Updated documentation to refer to the PNG-1.2 specification.
Removed ansi2knr.c and left pointers to the latest source for ansi2knr.c
in makefile.knr, INSTALL, and README (L. Peter Deutsch)
Fixed bugs in calculation of the length of rowbytes when adding alpha
channels to 16-bit images, in pngrtran.c (Chris Nokleberg)
Added function png_set_user_transform_info() to store user_transform_ptr,
user_depth, and user_channels into the png_struct, and a function
png_get_user_transform_ptr() to retrieve the pointer (Chris Nokleberg)
Added function png_set_empty_plte_permitted() to make libpng useable
in MNG applications.
Corrected the typedef for png_free_ptr in png.h (Jesse Jones).
Correct gamma with srgb is 45455 instead of 45000 in pngrutil.c, to be
consistent with PNG-1.2, and allow variance of 500 before complaining.
Added assembler code contributed by Intel in file pngvcrd.c and modified
makefile.w32 to use it (Nirav Chhatrapati, INTEL Corporation,
Gilles Vollant)
Changed "ln -s -f" to "ln -f -s" in the makefiles to make Solaris happy.
Added some aliases for png_set_expand() in pngrtran.c, namely
png_set_expand_PLTE(), png_set_expand_depth(), and png_set_expand_tRNS()
(Greg Roelofs, in "PNG: The Definitive Guide").
Added makefile.beo for BEOS on X86, contributed by Sander Stok.
Version 1.0.3b [August 26, 1999]
Replaced 2147483647L several places with PNG_MAX_UINT macro, defined in png.h
Changed leading blanks to tabs in all makefiles.
Define PNG_USE_PNGVCRD in makefile.w32, to get MMX assembler code.
Made alternate versions of png_set_expand() in pngrtran.c, namely
png_set_gray_1_2_4_to_8, png_set_palette_to_rgb, and png_set_tRNS_to_alpha
(Greg Roelofs, in "PNG: The Definitive Guide"). Deleted the 1.0.3a aliases.
Relocated start of 'extern "C"' block in png.h so it doesn't include pngconf.h
Revised calculation of num_blocks in pngmem.c to avoid a potentially
negative shift distance, whose results are undefined in the C language.
Added a check in pngset.c to prevent writing multiple tIME chunks.
Added a check in pngwrite.c to detect invalid small window_bits sizes.
Version 1.0.3d [September 4, 1999]
Fixed type casting of igamma in pngrutil.c
Added new png_expand functions to scripts/pngdef.pas and pngos2.def
Added a demo read_user_transform_fn that examines the row filters in pngtest.c
Version 1.0.4 [September 24, 1999]
Define PNG_ALWAYS_EXTERN in pngconf.h if __STDC__ is defined
Delete #define PNG_INTERNAL and include "png.h" from pngasmrd.h
Made several minor corrections to pngtest.c
Renamed the makefiles with longer but more user friendly extensions.
Copied the PNG copyright and license to a separate LICENSE file.
Revised documentation, png.h, and example.c to remove reference to
"viewing_gamma" which no longer appears in the PNG specification.
Revised pngvcrd.c to use MMX code for interlacing only on the final pass.
Updated pngvcrd.c to use the faster C filter algorithms from libpng-1.0.1a
Split makefile.win32vc into two versions, makefile.vcawin32 (uses MMX
assembler code) and makefile.vcwin32 (doesn't).
Added a CPU timing report to pngtest.c (enabled by defining PNGTEST_TIMING)
Added a copy of pngnow.png to the distribution.
Version 1.0.4a [September 25, 1999]
Increase max_pixel_depth in pngrutil.c if a user transform needs it.
Changed several division operations to right-shifts in pngvcrd.c
Version 1.0.4b [September 30, 1999]
Added parentheses in line 3732 of pngvcrd.c
Added a comment in makefile.linux warning about buggy -O3 in pgcc 2.95.1
Version 1.0.4c [October 1, 1999]
Added a "png_check_version" function in png.c and pngtest.c that will generate
a helpful compiler error if an old png.h is found in the search path.
Changed type of png_user_transform_depth|channels from int to png_byte.
Version 1.0.4d [October 6, 1999]
Changed 0.45 to 0.45455 in png_set_sRGB()
Removed unused PLTE entries from pngnow.png
Re-enabled some parts of pngvcrd.c (png_combine_row) that work properly.
Version 1.0.4e [October 10, 1999]
Fixed sign error in pngvcrd.c (Greg Roelofs)
Replaced some instances of memcpy with simple assignments in pngvcrd (GR-P)
Version 1.0.4f [October 15, 1999]
Surrounded example.c code with #if 0 .. #endif to prevent people from
inadvertently trying to compile it.
Changed png_get_header_version() from a function to a macro in png.h
Added type casting mostly in pngrtran.c and pngwtran.c
Removed some pointless "ptr = NULL" in pngmem.c
Added a "contrib" directory containing the source code from Greg's book.
Version 1.0.5 [October 15, 1999]
Minor editing of the INSTALL and README files.
Version 1.0.5a [October 23, 1999]
Added contrib/pngsuite and contrib/pngminus (Willem van Schaik)
Fixed a typo in the png_set_sRGB() function call in example.c (Jan Nijtmans)
Further optimization and bugfix of pngvcrd.c
Revised pngset.c so that it does not allocate or free memory in the user's
text_ptr structure. Instead, it makes its own copy.
Created separate write_end_info_struct in pngtest.c for a more severe test.
Added code in pngwrite.c to free info_ptr->text[i].key to stop a memory leak.
Version 1.0.5b [November 23, 1999]
src/Source/LibPNG/CHANGES view on Meta::CPAN
and to add some convenience macros for use with sCAL.
Version 1.0.5j [December 21, 1999]
Changed "unit" parameter of png_write_sCAL from png_byte to int, to work
around buggy compilers.
Added new type "png_fixed_point" for integers that hold float*100000 values
Restored backward compatibility of tEXt/zTXt chunk processing:
Restored the first four members of png_text to the same order as v.1.0.5d.
Added members "lang_key" and "itxt_length" to png_text struct. Set
text_length=0 when "text" contains iTXt data. Use the "compression"
member to distinguish among tEXt/zTXt/iTXt types. Added
PNG_ITXT_COMPRESSION_NONE (1) and PNG_ITXT_COMPRESSION_zTXt(2) macros.
The "Note" above, about backward incompatibility of libpng-1.0.5e, no
longer applies.
Fixed png_read|write_iTXt() to read|write parameters in the right order,
and to write the iTXt chunk after IDAT if it appears in the end_ptr.
Added pnggccrd.c, version of pngvcrd.c Intel assembler for gcc (Greg Roelofs)
Reversed the order of trying to write floating-point and fixed-point gAMA.
Version 1.0.5k [December 27, 1999]
Added many parentheses, e.g., "if (a && b & c)" becomes "if (a && (b & c))"
Added png_handle_as_unknown() function (Glenn)
Added png_free_chunk_list() function and chunk_list and num_chunk_list members
of png_ptr.
Eliminated erroneous warnings about multiple sPLT chunks and sPLT-after-PLTE.
Fixed a libpng-1.0.5h bug in pngrutil.c that was issuing erroneous warnings
about ignoring incorrect gAMA with sRGB (gAMA was in fact not ignored)
Added png_free_tRNS(); png_set_tRNS() now malloc's its own trans array (ESR).
Define png_get_int_32 when oFFs chunk is supported as well as when pCAL is.
Changed type of proflen from png_int_32 to png_uint_32 in png_get_iCCP().
Version 1.0.5l [January 1, 2000]
Added functions png_set_read_user_chunk_fn() and png_get_user_chunk_ptr()
for setting a callback function to handle unknown chunks and for
retrieving the associated user pointer (Glenn).
Version 1.0.5m [January 7, 2000]
Added high-level functions png_read_png(), png_write_png(), png_free_pixels().
Version 1.0.5n [January 9, 2000]
Added png_free_PLTE() function, and modified png_set_PLTE() to malloc its
own memory for info_ptr->palette. This makes it safe for the calling
application to free its copy of the palette any time after it calls
png_set_PLTE().
Version 1.0.5o [January 20, 2000]
Cosmetic changes only (removed some trailing blanks and TABs)
Version 1.0.5p [January 31, 2000]
Renamed pngdll.mak to makefile.bd32
Cosmetic changes in pngtest.c
Version 1.0.5q [February 5, 2000]
Relocated the makefile.solaris warning about PATH problems.
Fixed pngvcrd.c bug by pushing/popping registers in mmxsupport (Bruce Oberg)
Revised makefile.gcmmx
Added PNG_SETJMP_SUPPORTED, PNG_SETJMP_NOT_SUPPORTED, and PNG_ABORT() macros
Version 1.0.5r [February 7, 2000]
Removed superfluous prototype for png_get_itxt from png.h
Fixed a bug in pngrtran.c that improperly expanded the background color.
Return *num_text=0 from png_get_text() when appropriate, and fix documentation
of png_get_text() in libpng.txt/libpng.3.
Version 1.0.5s [February 18, 2000]
Added "png_jmp_env()" macro to pngconf.h, to help people migrate to the
new error handler that's planned for the next libpng release, and changed
example.c, pngtest.c, and contrib programs to use this macro.
Revised some of the DLL-export macros in pngconf.h (Greg Roelofs)
Fixed a bug in png_read_png() that caused it to fail to expand some images
that it should have expanded.
Fixed some mistakes in the unused and undocumented INCH_CONVERSIONS functions
in pngget.c
Changed the allocation of palette, history, and trans arrays back to
the version 1.0.5 method (linking instead of copying) which restores
backward compatibility with version 1.0.5. Added some remarks about
that in example.c. Added "free_me" member to info_ptr and png_ptr
and added png_free_data() function.
Updated makefile.linux and makefile.gccmmx to make directories conditionally.
Made cosmetic changes to pngasmrd.h
Added png_set_rows() and png_get_rows(), for use with png_read|write_png().
Modified png_read_png() to allocate info_ptr->row_pointers only if it
hasn't already been allocated.
Version 1.0.5t [March 4, 2000]
Changed png_jmp_env() migration aiding macro to png_jmpbuf().
Fixed "interlace" typo (should be "interlaced") in contrib/gregbook/read2-x.c
Fixed bug with use of PNG_BEFORE_IHDR bit in png_ptr->mode, introduced when
PNG_FLAG_HAVE_CHUNK_HEADER was moved into png_ptr->mode in version 1.0.5b
Files in contrib/gregbook were revised to use png_jmpbuf() and to select
a 24-bit visual if one is available, and to allow abbreviated options.
Files in contrib/pngminus were revised to use the png_jmpbuf() macro.
Removed spaces in makefile.linux and makefile.gcmmx, introduced in 1.0.5s
Version 1.0.5u [March 5, 2000]
Simplified the code that detects old png.h in png.c and pngtest.c
Renamed png_spalette (_p, _pp) to png_sPLT_t (_tp, _tpp)
Increased precision of rgb_to_gray calculations from 8 to 15 bits and
added png_set_rgb_to_gray_fixed() function.
Added makefile.bc32 (32-bit Borland C++, C mode)
Version 1.0.5v [March 11, 2000]
Added some parentheses to the png_jmpbuf macro definition.
Updated references to the zlib home page, which has moved to freesoftware.com.
Corrected bugs in documentation regarding png_read_row() and png_write_row().
Updated documentation of png_rgb_to_gray calculations in libpng.3/libpng.txt.
Renamed makefile.borland,turboc3 back to makefile.bor,tc3 as in version 1.0.3,
revised borland makefiles; added makefile.ibmvac3 and makefile.gcc (Cosmin)
Version 1.0.6 [March 20, 2000]
Minor revisions of makefile.bor, libpng.txt, and gregbook/rpng2-win.c
Added makefile.sggcc (SGI IRIX with gcc)
Version 1.0.6d [April 7, 2000]
Changed sprintf() to strcpy() in png_write_sCAL_s() to work without STDIO
Added data_length parameter to png_decompress_chunk() function
Revised documentation to remove reference to abandoned png_free_chnk functions
Fixed an error in png_rgb_to_gray_fixed()
Revised example.c, usage of png_destroy_write_struct().
Renamed makefile.ibmvac3 to makefile.ibmc, added libpng.icc IBM project file
Added a check for info_ptr->free_me&PNG_FREE_TEXT when freeing text in png.c
Simplify png_sig_bytes() function to remove use of non-ISO-C strdup().
Version 1.0.6e [April 9, 2000]
Added png_data_freer() function.
In the code that checks for over-length tRNS chunks, added check of
info_ptr->num_trans as well as png_ptr->num_trans (Matthias Benckmann)
Minor revisions of libpng.txt/libpng.3.
Check for existing data and free it if the free_me flag is set, in png_set_*()
and png_handle_*().
Only define PNG_WEIGHTED_FILTERS_SUPPORTED when PNG_FLOATING_POINT_SUPPORTED
src/Source/LibPNG/CHANGES view on Meta::CPAN
Removed "else" from pngread.c, after png_error(), and changed "0" to "length".
Changed several png_errors about malformed ancillary chunks to png_warnings.
Version 1.0.6g [April 24, 2000]
Added png_pass-* arrays to pnggccrd.c when PNG_USE_LOCAL_ARRAYS is defined.
Relocated paragraph about png_set_background() in libpng.3/libpng.txt
and other revisions (Matthias Benckmann)
Relocated info_ptr->free_me, png_ptr->free_me, and other info_ptr and
png_ptr members to restore binary compatibility with libpng-1.0.5
(breaks compatibility with libpng-1.0.6).
Version 1.0.6h [April 24, 2000]
Changed shared library so-number pattern from 2.x.y.z to xy.z (this builds
libpng.so.10 & libpng.so.10.6h instead of libpng.so.2 & libpng.so.2.1.0.6h)
This is a temporary change for test purposes.
Version 1.0.6i [May 2, 2000]
Rearranged some members at the end of png_info and png_struct, to put
unknown_chunks_num and free_me within the original size of the png_structs
and free_me, png_read_user_fn, and png_free_fn within the original png_info,
because some old applications allocate the structs directly instead of
using png_create_*().
Added documentation of user memory functions in libpng.txt/libpng.3
Modified png_read_png so that it will use user_allocated row_pointers
if present, unless free_me directs that it be freed, and added description
of the use of png_set_rows() and png_get_rows() in libpng.txt/libpng.3.
Added PNG_LEGACY_SUPPORTED macro, and #ifdef out all new (since version
1.00) members of png_struct and png_info, to regain binary compatibility
when you define this macro. Capabilities lost in this event
are user transforms (new in version 1.0.0),the user transform pointer
(new in version 1.0.2), rgb_to_gray (new in 1.0.5), iCCP, sCAL, sPLT,
the high-level interface, and unknown chunks support (all new in 1.0.6).
This was necessary because of old applications that allocate the structs
directly as authors were instructed to do in libpng-0.88 and earlier,
instead of using png_create_*().
Added modes PNG_CREATED_READ_STRUCT and PNG_CREATED_WRITE_STRUCT which
can be used to detect codes that directly allocate the structs, and
code to check these modes in png_read_init() and png_write_init() and
generate a libpng error if the modes aren't set and PNG_LEGACY_SUPPORTED
was not defined.
Added makefile.intel and updated makefile.watcom (Pawel Mrochen)
Version 1.0.6j [May 3, 2000]
Overloaded png_read_init() and png_write_init() with macros that convert
calls to png_read_init_2() or png_write_init_2() that check the version
and structure sizes.
Version 1.0.7beta11 [May 7, 2000]
Removed the new PNG_CREATED_READ_STRUCT and PNG_CREATED_WRITE_STRUCT modes
which are no longer used.
Eliminated the three new members of png_text when PNG_LEGACY_SUPPORTED is
defined or when neither PNG_READ_iTXt_SUPPORTED nor PNG_WRITE_iTXT_SUPPORTED
is defined.
Made PNG_NO_READ|WRITE_iTXt the default setting, to avoid memory
overrun when old applications fill the info_ptr->text structure directly.
Added PNGAPI macro, and added it to the definitions of all exported functions.
Relocated version macro definitions ahead of the includes of zlib.h and
pngconf.h in png.h.
Version 1.0.7beta12 [May 12, 2000]
Revised pngset.c to avoid a problem with expanding the png_debug macro.
Deleted some extraneous defines from pngconf.h
Made PNG_NO_CONSOLE_IO the default condition when PNG_BUILD_DLL is defined.
Use MSC _RPTn debugging instead of fprintf if _MSC_VER is defined.
Added png_access_version_number() function.
Check for mask&PNG_FREE_CHNK (for TEXT, SCAL, PCAL) in png_free_data().
Expanded libpng.3/libpng.txt information about png_data_freer().
Version 1.0.7beta14 [May 17, 2000] (beta13 was not published)
Changed pnggccrd.c and pngvcrd.c to handle bad adaptive filter types as
warnings instead of errors, as pngrutil.c does.
Set the PNG_INFO_IDAT valid flag in png_set_rows() so png_write_png()
will actually write IDATs.
Made the default PNG_USE_LOCAL_ARRAYS depend on PNG_DLL instead of WIN32.
Make png_free_data() ignore its final parameter except when freeing data
that can have multiple instances (text, sPLT, unknowns).
Fixed a new bug in png_set_rows().
Removed info_ptr->valid tests from png_free_data(), as in version 1.0.5.
Added png_set_invalid() function.
Fixed incorrect illustrations of png_destroy_write_struct() in example.c.
Version 1.0.7beta15 [May 30, 2000]
Revised the deliberately erroneous Linux setjmp code in pngconf.h to produce
fewer error messages.
Rearranged checks for Z_OK to check the most likely path first in pngpread.c
and pngwutil.c.
Added checks in pngtest.c for png_create_*() returning NULL, and mentioned
in libpng.txt/libpng.3 the need for applications to check this.
Changed names of png_default_*() functions in pngtest to pngtest_*().
Changed return type of png_get_x|y_offset_*() from png_uint_32 to png_int_32.
Fixed some bugs in the unused PNG_INCH_CONVERSIONS functions in pngget.c
Set each pointer to NULL after freeing it in png_free_data().
Worked around a problem in pngconf.h; AIX's strings.h defines an "index"
macro that conflicts with libpng's png_color_16.index. (Dimitri
Papadapoulos)
Added "msvc" directory with MSVC++ project files (Simon-Pierre Cadieux).
Version 1.0.7beta16 [June 4, 2000]
Revised the workaround of AIX string.h "index" bug.
Added a check for overlength PLTE chunk in pngrutil.c.
Added PNG_NO_POINTER_INDEXING macro to use array-indexing instead of pointer
indexing in pngrutil.c and pngwutil.c to accommodate a buggy compiler.
Added a warning in png_decompress_chunk() when it runs out of data, e.g.
when it tries to read an erroneous PhotoShop iCCP chunk.
Added PNG_USE_DLL macro.
Revised the copyright/disclaimer/license notice.
Added contrib/msvctest directory
Version 1.0.7rc1 [June 9, 2000]
Corrected the definition of PNG_TRANSFORM_INVERT_ALPHA (0x0400 not 0x0200)
Added contrib/visupng directory (Willem van Schaik)
Version 1.0.7beta18 [June 23, 2000]
Revised PNGAPI definition, and pngvcrd.c to work with __GCC__
and do not redefine PNGAPI if it is passed in via a compiler directive.
Revised visupng/PngFile.c to remove returns from within the Try block.
Removed leading underscores from "_PNG_H" and "_PNG_SAVE_BSD_SOURCE" macros.
Updated contrib/visupng/cexcept.h to version 1.0.0.
Fixed bugs in pngwrite.c and pngwutil.c that prevented writing iCCP chunks.
Version 1.0.7rc2 [June 28, 2000]
src/Source/LibPNG/CHANGES view on Meta::CPAN
Version 1.2.9beta2 [February 21, 2006]
Check for png_rgb_to_gray and png_gray_to_rgb read transformations before
checking for png_read_dither in pngrtran.c
Revised checking of chromaticity limits to accommodate extended RGB
colorspace (John Denker).
Changed line endings in some of the project files to CRLF, even in the
"Unix" tar distributions (Cosmin).
Made png_get_int_32 and png_save_int_32 always available (Cosmin).
Updated scripts/pngos2.def, scripts/pngw32.def and projects/wince/png32ce.def
with the newly exported functions.
Eliminated distributions without the "configure" script.
Updated INSTALL instructions.
Version 1.2.9beta3 [February 24, 2006]
Fixed CRCRLF line endings in contrib/visupng/VisualPng.dsp
Made libpng.pc respect EXEC_PREFIX (D. P. Kreil, J. Bowler)
Removed reference to pngasmrd.h from Makefile.am
Renamed CHANGES to ChangeLog.
Renamed LICENSE to COPYING.
Renamed ANNOUNCE to NEWS.
Created AUTHORS file.
Version 1.2.9beta4 [March 3, 2006]
Changed definition of PKGCONFIG from $prefix/lib to $libdir in configure.ac
Reverted to filenames LICENSE and ANNOUNCE; removed AUTHORS and COPYING.
Removed newline from the end of some error and warning messages.
Removed test for sqrt() from configure.ac and configure.
Made swap tables in pngtrans.c PNG_CONST (Carlo Bramix).
Disabled default iTXt support that was inadvertently enabled in
libpng-1.2.9beta1.
Added "OS2" to list of systems that don't need underscores, in pnggccrd.c
Removed libpng version and date from *.c files.
Version 1.2.9beta5 [March 4, 2006]
Removed trailing blanks from source files.
Put version and date of latest change in each source file, and changed
copyright year accordingly.
More cleanup of configure.ac, Makefile.am, and associated scripts.
Restored scripts/makefile.elf which was inadvertently deleted.
Version 1.2.9beta6 [March 6, 2006]
Fixed typo (RELEASE) in configuration files.
Version 1.2.9beta7 [March 7, 2006]
Removed libpng.vers and libpng.sym from libpng12_la_SOURCES in Makefile.am
Fixed inconsistent #ifdef's around png_sig_bytes() and png_set_sCAL_s()
in png.h.
Updated makefile.elf as suggested by debian.
Made cosmetic changes to some makefiles, adding LN_SF and other macros.
Made some makefiles accept "exec_prefix".
Version 1.2.9beta8 [March 9, 2006]
Fixed some "#if defined (..." which should be "#if defined(..."
Bug introduced in libpng-1.2.8.
Fixed inconsistency in definition of png_default_read_data()
Restored blank that was lost from makefile.sggcc "clean" target in beta7.
Revised calculation of "current" and "major" for irix in ltmain.sh
Changed "mkdir" to "MKDIR_P" in some makefiles.
Separated PNG_EXPAND and PNG_EXPAND_tRNS.
Added png_set_expand_gray_1_2_4_to_8() and deprecated
png_set_gray_1_2_4_to_8() which also expands tRNS to alpha.
Version 1.2.9beta9 [March 10, 2006]
Include "config.h" in pngconf.h when available.
Added some checks for NULL png_ptr or NULL info_ptr (timeless)
Version 1.2.9beta10 [March 20, 2006]
Removed extra CR from contrib/visualpng/VisualPng.dsw (Cosmin)
Made pnggccrd.c PIC-compliant (Christian Aichinger).
Added makefile.mingw (Wolfgang Glas).
Revised pngconf.h MMX checking.
Version 1.2.9beta11 [March 22, 2006]
Fixed out-of-order declaration in pngwrite.c that was introduced in beta9
Simplified some makefiles by using LIBSO, LIBSOMAJ, and LIBSOVER macros.
Version 1.2.9rc1 [March 31, 2006]
Defined PNG_USER_PRIVATEBUILD when including "pngusr.h" (Cosmin).
Removed nonsensical assertion check from pngtest.c (Cosmin).
Version 1.2.9 [April 14, 2006]
Revised makefile.beos and added "none" selector in ltmain.sh
Version 1.2.10beta1 [April 15, 2006]
Renamed "config.h" to "png_conf.h" and revised Makefile.am to add
-DPNG_BUILDING_LIBPNG to compile directive, and modified pngconf.h
to include png_conf.h only when PNG_BUILDING_LIBPNG is defined.
Version 1.2.10beta2 [April 15, 2006]
Manually updated Makefile.in and configure. Changed png_conf.h.in
back to config.h.
Version 1.2.10beta3 [April 15, 2006]
Change png_conf.h back to config.h in pngconf.h.
Version 1.2.10beta4 [April 16, 2006]
Change PNG_BUILDING_LIBPNG to PNG_CONFIGURE_LIBPNG in config/Makefile*.
Version 1.2.10beta5 [April 16, 2006]
Added a configure check for compiling assembler code in pnggccrd.c
Version 1.2.10beta6 [April 17, 2006]
Revised the configure check for pnggccrd.c
Moved -DPNG_CONFIGURE_LIBPNG into @LIBPNG_DEFINES@
Added @LIBPNG_DEFINES@ to arguments when building libpng.sym
Version 1.2.10beta7 [April 18, 2006]
Change "exec_prefix=$prefix" to "exec_prefix=$(prefix)" in makefiles.
Version 1.2.10rc1 [April 19, 2006]
Ensure pngconf.h doesn't define both PNG_USE_PNGGCCRD and PNG_USE_PNGVCRD
Fixed "LN_FS" typo in makefile.sco and makefile.solaris.
Version 1.2.10rc2 [April 20, 2006]
Added a backslash between -DPNG_CONFIGURE_LIBPNG and -DPNG_NO_ASSEMBLER_CODE
in configure.ac and configure
Made the configure warning about versioned symbols less arrogant.
Version 1.2.10rc3 [April 21, 2006]
Added a note in libpng.txt that png_set_sig_bytes(8) can be used when
writing an embedded PNG without the 8-byte signature.
src/Source/LibPNG/CHANGES view on Meta::CPAN
Version 1.2.15beta4 [December 7, 2006]
Added scripts/CMakeLists.txt
Changed PNG_NO_ASSEMBLER_CODE to PNG_NO_MMX_CODE in scripts, like 1.4.0beta
Version 1.2.15beta5 [December 7, 2006]
Changed some instances of PNG_ASSEMBLER_* to PNG_MMX_* in pnggccrd.c
Revised scripts/CMakeLists.txt
Version 1.2.15beta6 [December 13, 2006]
Revised scripts/CMakeLists.txt and configure.ac
Version 1.2.15rc1 [December 18, 2006]
Revised scripts/CMakeLists.txt
Version 1.2.15rc2 [December 21, 2006]
Added conditional #undef jmpbuf in pngtest.c to undo #define in AIX headers.
Added scripts/makefile.nommx
Version 1.2.15rc3 [December 25, 2006]
Fixed shared library numbering error that was introduced in 1.2.15beta6.
Version 1.2.15rc4 [December 27, 2006]
Fixed handling of rgb_to_gray when png_ptr->color.gray isn't set.
Version 1.2.15rc5 [December 31, 2006]
Revised handling of rgb_to_gray.
Version 1.2.15 [January 5, 2007]
Added some (unsigned long) typecasts in pngtest.c to avoid printing errors.
Version 1.2.16beta1 [January 6, 2007]
Fix bugs in makefile.nommx
Version 1.2.16beta2 [January 16, 2007]
Revised scripts/CMakeLists.txt
Version 1.2.16 [January 31, 2007]
No changes.
Version 1.2.17beta1 [March 6, 2007]
Revised scripts/CMakeLists.txt to install both shared and static libraries.
Deleted a redundant line from pngset.c.
Version 1.2.17beta2 [April 26, 2007]
Relocated misplaced test for png_ptr == NULL in pngpread.c
Change "==" to "&" for testing PNG_RGB_TO_GRAY_ERR & PNG_RGB_TO_GRAY_WARN
flags.
Changed remaining instances of PNG_ASSEMBLER_* to PNG_MMX_*
Added pngerror() when write_IHDR fails in deflateInit2().
Added "const" to some array declarations.
Mention examples of libpng usage in the libpng*.txt and libpng.3 documents.
Version 1.2.17rc1 [May 4, 2007]
No changes.
Version 1.2.17rc2 [May 8, 2007]
Moved several PNG_HAVE_* macros out of PNG_INTERNAL because applications
calling set_unknown_chunk_location() need them.
Changed transformation flag from PNG_EXPAND_tRNS to PNG_EXPAND in
png_set_expand_gray_1_2_4_to_8().
Added png_ptr->unknown_chunk to hold working unknown chunk data, so it
can be free'ed in case of error. Revised unknown chunk handling in
pngrutil.c and pngpread.c to use this structure.
Version 1.2.17rc3 [May 8, 2007]
Revised symbol-handling in configure script.
Version 1.2.17rc4 [May 10, 2007]
Revised unknown chunk handling to avoid storing unknown critical chunks.
Version 1.0.25 [May 15, 2007]
Version 1.2.17 [May 15, 2007]
Added "png_ptr->num_trans=0" before error return in png_handle_tRNS,
to eliminate a vulnerability (CVE-2007-2445, CERT VU#684664)
Version 1.0.26 [May 15, 2007]
Version 1.2.18 [May 15, 2007]
Reverted the libpng-1.2.17rc3 change to symbol-handling in configure script
Version 1.2.19beta1 [May 18, 2007]
Changed "const static" to "static PNG_CONST" everywhere, mostly undoing
change of libpng-1.2.17beta2. Changed other "const" to "PNG_CONST"
Changed some handling of unused parameters, to avoid compiler warnings.
"if (unused == NULL) return;" becomes "unused = unused".
Version 1.2.19beta2 [May 18, 2007]
Only use the valid bits of tRNS value in png_do_expand() (Brian Cartier)
Version 1.2.19beta3 [May 19, 2007]
Add some "png_byte" typecasts in png_check_keyword() and write new_key
instead of key in zTXt chunk (Kevin Ryde).
Version 1.2.19beta4 [May 21, 2007]
Add png_snprintf() function and use it in place of sprint() for improved
defense against buffer overflows.
Version 1.2.19beta5 [May 21, 2007]
Fixed png_handle_tRNS() to only use the valid bits of tRNS value.
Changed handling of more unused parameters, to avoid compiler warnings.
Removed some PNG_CONST in pngwutil.c to avoid compiler warnings.
Version 1.2.19beta6 [May 22, 2007]
Added some #ifdef PNG_MMX_CODE_SUPPORTED where needed in pngvcrd.c
Added a special "_MSC_VER" case that defines png_snprintf to _snprintf
Version 1.2.19beta7 [May 22, 2007]
Squelched png_squelch_warnings() in pnggccrd.c and added
an #ifdef PNG_MMX_CODE_SUPPORTED block around the declarations that caused
the warnings that png_squelch_warnings was squelching.
Version 1.2.19beta8 [May 22, 2007]
Removed __MMX__ from test in pngconf.h.
Version 1.2.19beta9 [May 23, 2007]
Made png_squelch_warnings() available via PNG_SQUELCH_WARNINGS macro.
Revised png_squelch_warnings() so it might work.
Updated makefile.sgcc and makefile.solaris; added makefile.solaris-x86.
Version 1.2.19beta10 [May 24, 2007]
Resquelched png_squelch_warnings(), use "__attribute__((used))" instead.
Version 1.4.0beta1 [April 20, 2006]
Enabled iTXt support (changes png_struct, thus requires so-number change).
Cleaned up PNG_ASSEMBLER_CODE_SUPPORTED vs PNG_MMX_CODE_SUPPORTED
Eliminated PNG_1_0_X and PNG_1_2_X macros.
Removed deprecated functions png_read_init, png_write_init, png_info_init,
png_permit_empty_plte, png_set_gray_1_2_4_to_8, png_check_sig, and
removed the deprecated macro PNG_MAX_UINT.
Moved "PNG_INTERNAL" parts of png.h and pngconf.h into pngintrn.h
Removed many WIN32_WCE #ifdefs (Cosmin).
Reduced dependency on C-runtime library when on Windows (Simon-Pierre)
Replaced sprintf() with png_sprintf() (Simon-Pierre)
Version 1.4.0beta2 [April 20, 2006]
Revised makefiles and configure to avoid making links to libpng.so.*
Moved some leftover MMX-related defines from pngconf.h to pngintrn.h
Updated scripts/pngos2.def, pngw32.def, and projects/wince/png32ce.def
Version 1.4.0beta3 [May 10, 2006]
Updated scripts/pngw32.def to comment out MMX functions.
Added PNG_NO_GET_INT_32 and PNG_NO_SAVE_INT_32 macros.
Scripts/libpng.pc.in contained "configure" style version info and would
not work with makefiles.
Revised pngconf.h and added pngconf.h.in, so makefiles and configure can
pass defines to libpng and applications.
Version 1.4.0beta4 [May 11, 2006]
src/Source/LibPNG/CHANGES view on Meta::CPAN
Version 1.4.0beta25 [July 30, 2008]
Added a call to png_check_chunk_name() in pngpread.c
Reverted png_check_chunk_name() to accept a name with a lowercase 3rd byte.
Added png_push_have_buffer() function to pngpread.c
Eliminated PNG_BIG_ENDIAN_SUPPORTED and associated png_get_* macros.
Made inline expansion of png_get_*() optional with PNG_USE_READ_MACROS.
Eliminated all PNG_USELESS_TESTS and PNG_CORRECT_PALETTE_SUPPORTED code.
Synced contrib directory and configure files with libpng-1.2.30beta06.
Eliminated no-longer-used pngdefs.h (but it's still built in the makefiles)
Relocated a misplaced "#endif /* PNG_NO_WRITE_FILTER */" in pngwutil.c
Version 1.4.0beta26 [August 4, 2008]
Removed png_push_have_buffer() function in pngpread.c. It increased the
compiled library size slightly.
Changed "-Wall" to "-W -Wall" in the CFLAGS in all makefiles (Cosmin Truta)
Declared png_ptr "volatile" in pngread.c and pngwrite.c to avoid warnings.
Updated contrib/visupng/cexcept.h to version 2.0.1
Added PNG_LITERAL_CHARACTER macros for #, [, and ].
Version 1.4.0beta27 [August 5, 2008]
Revised usage of PNG_LITERAL_SHARP in pngerror.c.
Moved newline character from individual png_debug messages into the
png_debug macros.
Allow user to #define their own png_debug, png_debug1, and png_debug2.
Version 1.4.0beta28 [August 5, 2008]
Revised usage of PNG_LITERAL_SHARP in pngerror.c.
Added PNG_STRING_NEWLINE macro
Version 1.4.0beta29 [August 9, 2008]
Revised usage of PNG_STRING_NEWLINE to work on non-ISO compilers.
Added PNG_STRING_COPYRIGHT macro.
Added non-ISO versions of png_debug macros.
Version 1.4.0beta30 [August 14, 2008]
Added premultiplied alpha feature (Volker Wiendl).
Version 1.4.0beta31 [August 18, 2008]
Moved png_set_premultiply_alpha from pngtrans.c to pngrtran.c
Removed extra crc check at the end of png_handle_cHRM(). Bug introduced
in libpng-1.4.0beta20.
Version 1.4.0beta32 [August 19, 2008]
Added PNG_WRITE_FLUSH_SUPPORTED block around new png_flush() call.
Revised PNG_NO_STDIO version of png_write_flush()
Version 1.4.0beta33 [August 20, 2008]
Added png_get|set_chunk_cache_max() to limit the total number of sPLT,
text, and unknown chunks that can be stored.
Version 1.4.0beta34 [September 6, 2008]
Shortened tIME_string to 29 bytes in pngtest.c
Fixed off-by-one error introduced in png_push_read_zTXt() function in
libpng-1.2.30beta04/pngpread.c (Harald van Dijk)
Version 1.4.0beta35 [October 6, 2008]
Changed "trans_values" to "trans_color".
Changed so-number from 0 to 14. Some OS do not like 0.
Revised makefile.darwin to fix shared library numbering.
Change png_set_gray_1_2_4_to_8() to png_set_expand_gray_1_2_4_to_8()
in example.c (debian bug report)
Version 1.4.0beta36 [October 25, 2008]
Sync with tEXt vulnerability fix in libpng-1.2.33rc02.
Version 1.4.0beta37 [November 13, 2008]
Added png_check_cHRM in png.c and moved checking from pngget.c, pngrutil.c,
and pngwrite.c
Version 1.4.0beta38 [November 22, 2008]
Added check for zero-area RGB cHRM triangle in png_check_cHRM() and
png_check_cHRM_fixed().
Version 1.4.0beta39 [November 23, 2008]
Revised png_warning() to write its message on standard output by default
when warning_fn is NULL.
Version 1.4.0beta40 [November 24, 2008]
Eliminated png_check_cHRM(). Instead, always use png_check_cHRM_fixed().
In png_check_cHRM_fixed(), ensure white_y is > 0, and removed redundant
check for all-zero coordinates that is detected by the triangle check.
Version 1.4.0beta41 [November 26, 2008]
Fixed string vs pointer-to-string error in png_check_keyword().
Rearranged test expressions in png_check_cHRM_fixed() to avoid internal
overflows.
Added PNG_NO_CHECK_cHRM conditional.
Version 1.4.0beta42, 43 [December 1, 2008]
Merge png_debug with version 1.2.34beta04.
Version 1.4.0beta44 [December 6, 2008]
Removed redundant check for key==NULL before calling png_check_keyword()
to ensure that new_key gets initialized and removed extra warning
(Merge with version 1.2.34beta05 -- Arvan Pritchard).
Version 1.4.0beta45 [December 9, 2008]
In png_write_png(), respect the placement of the filler bytes in an earlier
call to png_set_filler() (Jim Barry).
Version 1.4.0beta46 [December 10, 2008]
Undid previous change and added PNG_TRANSFORM_STRIP_FILLER_BEFORE and
PNG_TRANSFORM_STRIP_FILLER_AFTER conditionals and deprecated
PNG_TRANSFORM_STRIP_FILLER (Jim Barry).
Version 1.4.0beta47 [December 15, 2008]
Support for dithering was disabled by default, because it has never
been well tested and doesn't work very well. The code has not
been removed, however, and can be enabled by building libpng with
PNG_READ_DITHER_SUPPORTED defined.
Version 1.4.0beta48 [February 14, 2009]
Added new exported function png_calloc().
Combined several instances of png_malloc(); png_memset() into png_calloc().
Removed prototype for png_freeptr() that was added in libpng-1.4.0beta24
but was never defined.
Version 1.4.0beta49 [February 28, 2009]
Added png_fileno() macro to pngconf.h, used in pngwio.c
Corrected order of #ifdef's in png_debug definition in png.h
src/Source/LibPNG/CHANGES view on Meta::CPAN
Version 1.4.0beta95 [November 10, 2009]
Changed png_check_sig() to !png_sig_cmp() in contrib programs.
Added -DPNG_CONFIGURE_LIBPNG to contrib/pngminm/*/makefile
Changed png_check_sig() to !png_sig_cmp() in contrib programs.
Corrected the png_get_IHDR() call in contrib/gregbook/readpng2.c
Changed pngminim/*/gather.sh to stop trying to remove pnggccrd.c and pngvcrd.c
Added dependency on pngpriv.h in contrib/pngminim/*/makefile
Version 1.4.0beta96 [November 12, 2009]
Renamed scripts/makefile.wce to scripts/makefile.cegcc
Revised Makefile.am to use libpng.sys while building libpng.so
so that only PNG_EXPORT functions are exported.
Removed the deprecated png_check_sig() function/macro.
Removed recently removed function names from scripts/*.def
Revised pngtest.png to put chunks in the same order written by pngtest
(evidently the same change made in libpng-1.0beta54 was lost).
Added PNG_PRIVATE macro definition in pngconf.h for possible future use.
Version 1.4.0beta97 [November 13, 2009]
Restored pngtest.png to the libpng-1.4.0beta7 version.
Removed projects/beos and netware.txt; no one seems to be supporting them.
Revised Makefile.in
Version 1.4.0beta98 [November 13, 2009]
Added the "xcode" project to zip distributions,
Fixed a typo in scripts/pngwin.def introduced in beta97.
Version 1.4.0beta99 [November 14, 2009]
Moved libpng-config.in and libpng.pc-configure.in out of the scripts
directory, to libpng-config.in and libpng-pc.in, respectively, and
modified Makefile.am and configure.ac accordingly. Now "configure"
needs nothing from the "scripts" directory.
Avoid redefining PNG_CONST in pngconf.h
Version 1.4.0beta100 [November 14, 2009]
Removed ASM builds from projects/visualc6 and projects/visualc71
Removed scripts/makefile.nommx and makefile.vcawin32
Revised CMakeLists.txt to account for new location of libpng-config.in
and libpng-pc.in
Updated INSTALL to reflect removal and relocation of files.
Version 1.4.0beta101 [November 14, 2009]
Restored the binary files (*.jpg, *.png, some project files) that were
accidentally deleted from the zip and 7z distributions when the xcode
project was added.
Version 1.4.0beta102 [November 18, 2009]
Added libpng-config.in and libpng-pc.in to the zip and 7z distributions.
Fixed a typo in projects/visualc6/pngtest.dsp, introduced in beta100.
Moved descriptions of makefiles and other scripts out of INSTALL into
scripts/README.txt
Updated the copyright year in scripts/pngwin.rc from 2006 to 2009.
Version 1.4.0beta103 [November 21, 2009]
Removed obsolete comments about ASM from projects/visualc71/README_zlib.txt
Align row_buf on 16-byte boundary in memory.
Restored the PNG_WRITE_FLUSH_AFTER_IEND_SUPPORTED guard around the call
to png_flush() after png_write_IEND(). See 1.4.0beta32, 1.4.0beta50
changes above and 1.2.30, 1.2.30rc01 and rc03 in 1.2.41 CHANGES. Someone
needs this feature.
Make the 'png_jmpbuf' macro expand to a call that records the correct
longjmp function as well as returning a pointer to the setjmp
jmp_buf buffer, and marked direct access to jmpbuf 'deprecated'.
(John Bowler)
Version 1.4.0beta104 [November 22, 2009]
Removed png_longjmp_ptr from scripts/*.def and libpng.3
Rebuilt configure scripts with autoconf-2.65
Version 1.4.0beta105 [November 25, 2009]
Use fast integer PNG_DIVIDE_BY_255() or PNG_DIVIDE_BY_65535()
to accomplish alpha premultiplication when
PNG_READ_COMPOSITE_NODIV_SUPPORTED is defined.
Changed "/255" to "/255.0" in background calculations to make it clear
that the 255 is used as a double.
Version 1.4.0beta106 [November 27, 2009]
Removed premultiplied alpha feature.
Version 1.4.0beta107 [December 4, 2009]
Updated README
Added "#define PNG_NO_PEDANTIC_WARNINGS" in the libpng source files.
Removed "-DPNG_CONFIGURE_LIBPNG" from the makefiles and projects.
Revised scripts/makefile.netbsd, makefile.openbsd, and makefile.sco
to put png.h and pngconf.h in $prefix/include, like the other scripts,
instead of in $prefix/include/libpng. Also revised makefile.sco
to put them in $prefix/include/libpng15 instead of in
$prefix/include/libpng/libpng15.
Version 1.4.0beta108 [December 11, 2009]
Removed leftover "-DPNG_CONFIGURE_LIBPNG" from contrib/pngminim/*/makefile
Relocated png_do_chop() to its original position in pngrtran.c; the
change in version 1.2.41beta08 caused transparency to be handled wrong
in some 16-bit datastreams (Yusaku Sugai).
Version 1.4.0beta109 [December 13, 2009]
Added "bit_depth" parameter to the private png_build_gamma_table() function.
Pass bit_depth=8 to png_build_gamma_table() when bit_depth is 16 but the
PNG_16_TO_8 transform has been set, to avoid unnecessary build of 16-bit
tables.
Version 1.4.0rc02 [December 20, 2009]
Declared png_cleanup_needed "volatile" in pngread.c and pngwrite.c
Version 1.4.0rc03 [December 22, 2009]
Renamed libpng-pc.in back to libpng.pc.in and revised CMakeLists.txt
(revising the change in 1.4.0beta99)
Version 1.4.0rc04 [December 25, 2009]
Swapped PNG_UNKNOWN_CHUNKS_SUPPORTED and PNG_HANDLE_AS_UNKNOWN_SUPPORTED
in pngset.c to be consistent with other changes in version 1.2.38.
Version 1.4.0rc05 [December 25, 2009]
Changed "libpng-pc.in" to "libpng.pc.in" in configure.ac, configure, and
Makefile.in to be consistent with changes in libpng-1.4.0rc03
Version 1.4.0rc06 [December 29, 2009]
Reverted the gamma_table changes from libpng-1.4.0beta109.
Fixed some indentation errors.
Version 1.4.0rc07 [January 1, 2010]
src/Source/LibPNG/CHANGES view on Meta::CPAN
in version 1.5.0beta36 but is not noted in the CHANGES. Similarly,
it was changed from png_charpp to png_const_bytepp in png_set_iCCP().
Ensure that png_rgb_to_gray ignores palette mapped images, if libpng
internally happens to call it with one, and fixed a failure to handle
palette mapped images correctly. This fixes CVE-2690.
Version 1.5.1beta02 [January 14, 2011]
Fixed a bug in handling of interlaced images (bero at arklinux.org).
Updated CMakeLists.txt (Clifford Yapp)
Version 1.5.1beta03 [January 14, 2011]
Fixed typecasting of some png_debug() statements (Cosmin)
Version 1.5.1beta04 [January 16, 2011]
Updated documentation of png_set|get_tRNS() (Thomas Klausner).
Mentioned in the documentation that applications must #include "zlib.h"
if they need access to anything in zlib.h, and that a number of
macros such as png_memset() are no longer accessible by applications.
Corrected pngvalid gamma test "sample" function to access all of the color
samples of each pixel, instead of sampling the red channel three times.
Prefixed variable names index, div, exp, gamma with "png_" to avoid "shadow"
warnings, and (mistakenly) changed png_exp() to exp().
Version 1.5.1beta05 [January 16, 2011]
Changed variable names png_index, png_div, png_exp, and png_gamma to
char_index, divisor, exp_b10, and gamma_val, respectively, and
changed exp() back to png_exp().
Version 1.5.1beta06 [January 20, 2011]
Prevent png_push_crc_skip() from hanging while reading an unknown chunk
or an over-large compressed zTXt chunk with the progressive reader.
Eliminated more GCC "shadow" warnings.
Revised png_fixed() in png.c to avoid compiler warning about reaching the
end without returning anything.
Version 1.5.1beta07 [January 22, 2011]
In the manual, describe the png_get_IHDR() arguments in the correct order.
Added const_png_structp and const_png_infop types, and used them in
prototypes for most png_get_*() functions.
Version 1.5.1beta08 [January 23, 2011]
Added png_get_io_chunk_type() and deprecated png_get_io_chunk_name()
Added synopses for the IO_STATE functions and other missing synopses
to the manual. Removed the synopses from libpngpf.3 because they
were out of date and no longer useful. Better information can be
obtained by reading the prototypes and comments in pngpriv.h
Attempted to fix cpp on Solaris with S. Studio 12 cc, fix build
Added a make macro DFNCPP that is a CPP that will accept the tokens in
a .dfn file and adds configure stuff to test for such a CPP. ./configure
should fail if one is not available.
Corrected const_png_ in png.h to png_const_ to avoid polluting the namespace.
Added png_get_current_row_number and png_get_current_pass_number for the
benefit of the user transform callback.
Added png_process_data_pause and png_process_data_skip for the benefit of
progressive readers that need to stop data processing or want to optimize
skipping of unread data (e.g., if the reader marks a chunk to be skipped.)
Version 1.5.1beta09 [January 24, 2011]
Enhanced pngvalid, corrected an error in gray_to_rgb, corrected doc error.
pngvalid contains tests of transforms, which tests are currently disabled
because they are incompletely tested. gray_to_rgb was failing to expand
the bit depth for smaller bit depth images; this seems to be a long
standing error and resulted, apparently, in invalid output
(CVE-2011-0408, CERT VU#643140). The documentation did not accurately
describe what libpng really does when converting RGB to gray.
Version 1.5.1beta10 [January 27, 2010]
Fixed incorrect examples of callback prototypes in the manual, that were
introduced in libpng-1.0.0.
In addition the order of the png_get_uint macros with respect to the
relevant function definitions has been reversed. This helps the
preprocessing of the symbol files be more robust. Furthermore, the
symbol file preprocessing now uses -DPNG_NO_USE_READ_MACROS even when
the library may actually be built with PNG_USE_READ_MACROS; this stops
the read macros interfering with the symbol file format.
Made the manual, synopses, and function prototypes use the function
argument names file_gamma, int_file_gamma, and srgb_intent consistently.
Version 1.5.1beta11 [January 28, 2011]
Changed PNG_UNUSED from "param=param;" to "{if(param){}}".
Corrected local variable type in new API png_process_data_skip()
The type was self-evidently incorrect but only causes problems on 64-bit
architectures.
Added transform tests to pngvalid and simplified the arguments.
Version 1.5.1rc01 [January 29, 2011]
No changes.
Version 1.5.1rc02 [January 31, 2011]
Added a request in the manual that applications do not use "png_" or
"PNG_" to begin any of their own symbols.
Changed PNG_UNUSED to "(void)param;" and updated the commentary in pngpriv.h
Version 1.5.1 [February 3, 2011]
No changes.
Version 1.5.2beta01 [February 13, 2011]
More -Wshadow fixes for older gcc compilers. Older gcc versions apparently
check formal parameters names in function declarations (as well as
definitions) to see if they match a name in the global namespace.
Revised PNG_EXPORTA macro to not use an empty parameter, to accommodate the
old VisualC++ preprocessor.
Turned on interlace handling in png_read_png().
Fixed gcc pendantic warnings.
Handle longjmp in Cygwin.
Fixed png_get_current_row_number() in the interlaced case.
Cleaned up ALPHA flags and transformations.
Implemented expansion to 16 bits.
Version 1.5.2beta02 [February 19, 2011]
Fixed mistake in the descriptions of user read_transform and write_transform
function prototypes in the manual. The row_info struct is png_row_infop.
Reverted png_get_current_row_number() to previous (1.5.2beta01) behavior.
Corrected png_get_current_row_number documentation
Fixed the read/write row callback documentation.
This documents the current behavior, where the callback is called after
every row with information pertaining to the next row.
Version 1.5.2beta03 [March 3, 2011]
Fixed scripts/makefile.vcwin32
Updated contrib/pngsuite/README to add the word "modify".
Define PNG_ALLOCATED to blank when _MSC_VER<1300.
Version 1.5.2rc01 [March 19, 2011]
Define remaining attributes to blank when MSC_VER<1300.
ifdef out mask arrays in pngread.c when interlacing is not supported.
Version 1.5.2rc02 [March 22, 2011]
Added a hint to try CPP=/bin/cpp if "cpp -E" fails in scripts/pnglibconf.mak
and in contrib/pngminim/*/makefile, eg., on SunOS 5.10, and removed "strip"
from the makefiles.
Fixed a bug (present since libpng-1.0.7) that makes png_handle_sPLT() fail
to compile when PNG_NO_POINTER_INDEXING is defined (Chubanov Kirill)
Version 1.5.2rc03 [March 24, 2011]
Don't include standard header files in png.h while building the symbol table,
to avoid cpp failure on SunOS (introduced PNG_BUILDING_SYMBOL_TABLE macro).
Version 1.5.2 [March 31, 2011]
No changes.
Version 1.5.3beta01 [April 1, 2011]
Re-initialize the zlib compressor before compressing non-IDAT chunks.
Added API functions (png_set_text_compression_level() and four others) to
set parameters for zlib compression of non-IDAT chunks.
Version 1.5.3beta02 [April 3, 2011]
Updated scripts/symbols.def with new API functions.
Only compile the new zlib re-initializing code when text or iCCP is
supported, using PNG_WRITE_COMPRESSED_TEXT_SUPPORTED macro.
Improved the optimization of the zlib CMF byte (see libpng-1.2.6beta03).
Optimize the zlib CMF byte in non-IDAT compressed chunks
Version 1.5.3beta03 [April 16, 2011]
Fixed gcc -ansi -pedantic compile. A strict ANSI system does not have
snprintf, and the "__STRICT_ANSI__" detects that condition more reliably
than __STDC__ (John Bowler).
Removed the PNG_PTR_NORETURN attribute because it too dangerous. It tells
the compiler that a user supplied callback (the error handler) does not
return, yet there is no guarantee in practice that the application code
will correctly implement the error handler because the compiler only
issues a warning if there is a mistake (John Bowler).
Removed the no-longer-used PNG_DEPSTRUCT macro.
Updated the zlib version to 1.2.5 in the VStudio project.
Fixed 64-bit builds where png_uint_32 is smaller than png_size_t in
pngwutil.c (John Bowler).
Fixed bug with stripping the filler or alpha channel when writing, that
was introduced in libpng-1.5.2beta01 (bug report by Andrew Church).
Version 1.5.3beta04 [April 27, 2011]
Updated pngtest.png with the new zlib CMF optimization.
Cleaned up conditional compilation code and of background/gamma handling
Internal changes only except a new option to avoid compiling the
png_build_grayscale_palette API (which is not used at all internally.)
The main change is to move the transform tests (READ_TRANSFORMS,
WRITE_TRANSFORMS) up one level to the caller of the APIs. This avoids
calls to spurious functions if all transforms are disabled and slightly
simplifies those functions. Pngvalid modified to handle this.
A minor change is to stop the strip_16 and expand_16 interfaces from
disabling each other; this allows the future alpha premultiplication
code to use 16-bit intermediate values while still producing 8-bit output.
png_do_background and png_do_gamma have been simplified to take a single
pointer to the png_struct rather than pointers to every item required
from the png_struct. This makes no practical difference to the internal
code.
A serious bug in the pngvalid internal routine 'standard_display_init' has
been fixed - this failed to initialize the red channel and accidentally
initialized the alpha channel twice.
Changed png_struct jmp_buf member name from png_jmpbuf to tmp_jmpbuf to
avoid a possible clash with the png_jmpbuf macro on some platforms.
Version 1.5.3beta05 [May 6, 2011]
Added the "_POSIX_SOURCE" feature test macro to ensure libpng sees the
correct API. _POSIX_SOURCE is defined in pngpriv.h, pngtest.c and
pngvalid.c to ensure that POSIX conformant systems disable non-POSIX APIs.
Removed png_snprintf and added formatted warning messages. This change adds
internal APIs to allow png_warning messages to have parameters without
requiring the host OS to implement snprintf. As a side effect the
dependency of the tIME-supporting RFC1132 code on stdio is removed and
PNG_NO_WARNINGS does actually work now.
Pass "" instead of '\0' to png_default_error() in png_err(). This mistake
was introduced in libpng-1.2.20beta01. This fixes CVE-2011-2691.
Added PNG_WRITE_OPTIMIZE_CMF_SUPPORTED macro to make the zlib "CMF" byte
optimization configureable.
IDAT compression failed if preceded by a compressed text chunk (bug
introduced in libpng-1.5.3beta01-02). This was because the attempt to
reset the zlib stream in png_write_IDAT happened after the first IDAT
chunk had been deflated - much too late. In this change internal
functions were added to claim/release the z_stream and, hopefully, make
the code more robust. Also deflateEnd checking is added - previously
libpng would ignore an error at the end of the stream.
Version 1.5.3beta06 [May 8, 2011]
Removed the -D_ALL_SOURCE from definitions for AIX in CMakeLists.txt
Implemented premultiplied alpha support: png_set_alpha_mode API
Version 1.5.3beta07 [May 11, 2011]
Added expand_16 support to the high level interface.
Added named value and 'flag' gamma support to png_set_gamma. Made a minor
change from the previous (unreleased) ABI/API to hide the exact value used
for Macs - it's not a good idea to embed this in the ABI!
Moved macro definitions for PNG_HAVE_IHDR, PNG_HAVE_PLTE, and PNG_AFTER_IDAT
from pngpriv.h to png.h because they must be visible to applications
that call png_set_unknown_chunks().
Check for up->location !PNG_AFTER_IDAT when writing unknown chunks
before IDAT.
Version 1.5.3beta08 [May 16, 2011]
Improved "pngvalid --speed" to exclude more of pngvalid from the time.
Documented png_set_alpha_mode(), other changes in libpng.3/libpng-manual.txt
The cHRM chunk now sets the defaults for png_set_rgb_to_gray() (when negative
parameters are supplied by the caller), while in the absence of cHRM
sRGB/Rec 709 values are still used. This introduced a divide-by-zero
bug in png_handle_cHRM().
The bKGD chunk no longer overwrites the background value set by
png_set_background(), allowing the latter to be used before the file
header is read. It never performed any useful function to override
the default anyway.
Added memory overwrite and palette image checks to pngvalid.c
Previously palette image code was poorly checked. Since the transformation
code has a special palette path in most cases this was a severe weakness.
Minor cleanup and some extra checking in pngrutil.c and pngrtran.c. When
expanding an indexed image, always expand to RGBA if transparency is
present.
Version 1.5.3beta09 [May 17, 2011]
Reversed earlier 1.5.3 change of transformation order; move png_expand_16
back where it was. The change doesn't work because it requires 16-bit
gamma tables when the code only generates 8-bit ones. This fails
silently; the libpng code just doesn't do any gamma correction. Moving
the tests back leaves the old, inaccurate, 8-bit gamma calculations, but
these are clearly better than none!
Version 1.5.3beta10 [May 20, 2011]
png_set_background() and png_expand_16() did not work together correctly.
This problem is present in 1.5.2; if png_set_background is called with
need_expand false and the matching 16 bit color libpng erroneously just
treats it as an 8-bit color because of where png_do_expand_16 is in the
transform list. This simple fix reduces the supplied colour to 8-bits,
so it gets smashed, but this is better than the current behavior.
Added tests for expand16, more fixes for palette image tests to pngvalid.
Corrects the code for palette image tests and disables attempts to
validate palette colors.
Version 1.5.3rc01 [June 3, 2011]
No changes.
Version 1.5.3rc02 [June 8, 2011]
Fixed uninitialized memory read in png_format_buffer() (Bug report by
Frank Busse, CVE-2011-2501, related to CVE-2004-0421).
Version 1.5.3beta11 [June 11, 2011]
Fixed png_handle_sCAL which is broken in 1.5. This fixes CVE 2011-2692.
Added sCAL to pngtest.png
Revised documentation about png_set_user_limits() to say that it also affects
png writing.
Revised handling of png_set_user_limits() so that it can increase the
limit beyond the PNG_USER_WIDTH|HEIGHT_MAX; previously it could only
reduce it.
Make the 16-to-8 scaling accurate. Dividing by 256 with no rounding is
wrong (high by one) 25% of the time. Dividing by 257 with rounding is
wrong in 128 out of 65536 cases. Getting the right answer all the time
without division is easy.
Added "_SUPPORTED" to the PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION macro.
Added projects/owatcom, an IDE project for OpenWatcom to replace
scripts/makefile.watcom. This project works with OpenWatcom 1.9. The
IDE autogenerates appropriate makefiles (libpng.mk) for batch processing.
The project is configurable, unlike the Visual Studio project, so long
as the developer has an awk.
Changed png_set_gAMA to limit the gamma value range so that the inverse
of the stored value cannot overflow the fixed point representation,
and changed other things OpenWatcom warns about.
Revised pngvalid.c to test PNG_ALPHA_MODE_SUPPORTED correctly. This allows
pngvalid to build when ALPHA_MODE is not supported, which is required if
it is to build on libpng 1.4.
Removed string/memory macros that are no longer used and are not
necessarily fully supportable, particularly png_strncpy and png_snprintf.
Added log option to pngvalid.c and attempted to improve gamma messages.
Version 1.5.3 [omitted]
People found the presence of a beta release following an rc release
to be confusing; therefore we bump the version to libpng-1.5.4beta01
and there will be no libpng-1.5.3 release.
Version 1.5.4beta01 [June 14, 2011]
Made it possible to undefine PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED
to get the same (inaccurate) output as libpng-1.5.2 and earlier.
Moved definitions of PNG_HAVE_IHDR, PNG_AFTER_IDAT, and PNG_HAVE_PLTE
outside of an unknown-chunk block in png.h because they are also
needed for other uses.
Version 1.5.4beta02 [June 14, 2011]
Fixed and clarified LEGACY 16-to-8 scaling code.
Added png_set_chop_16() API, to match inaccurate results from previous
libpng versions.
Removed the ACCURATE and LEGACY options (they are no longer useable)
Use the old scaling method for background if png_set_chop_16() was
called.
Made png_set_chop_16() API removeable by disabling PNG_CHOP_16_TO_8_SUPPORTED
Version 1.5.4beta03 [June 15, 2011]
Fixed a problem in png_do_expand_palette() exposed by optimization in
1.5.3beta06
Also removed a spurious and confusing "trans" member ("trans") from png_info.
The palette expand optimization prevented expansion to an intermediate RGBA
form if tRNS was present but alpha was marked to be stripped; this exposed
a check for tRNS in png_do_expand_palette() which is inconsistent with the
code elsewhere in libpng.
Correction to the expand_16 code; removed extra instance of
png_set_scale_16_to_8 from pngpriv.h
Version 1.5.4beta04 [June 16, 2011]
Added a missing "#ifdef PNG_READ_BACKGROUND_SUPPORTED/#endif" in pngrtran.c
Added PNG_TRANSFORM_CHOP_16 to the high-level read transforms.
Made PNG_READ_16_TO_8_ACCURATE_SCALE configurable again. If this is
not enabled, png_set_strip_16() and png_do_scale_16_to_8() aren't built.
Revised contrib/visupng, gregbook, and pngminim to demonstrate chop_16_to_8
Version 1.5.4beta05 [June 16, 2011]
Renamed png_set_strip_16() to png_set_scale_16() and renamed
png_set_chop_16() to png_set_strip(16) in an attempt to minimize the
behavior changes between libpng14 and libpng15.
Version 1.5.4beta06 [June 18, 2011]
Fixed new bug that was causing both strip_16 and scale_16 to be applied.
Version 1.5.4beta07 [June 19, 2011]
Fixed pngvalid, simplified macros, added checking for 0 in sCAL.
The ACCURATE scale macro is no longer defined in 1.5 - call the
png_scale_16_to_8 API. Made sure that PNG_READ_16_TO_8 is still defined
if the png_strip_16_to_8 API is present. png_check_fp_number now
maintains some state so that positive, negative and zero values are
identified. sCAL uses these to be strictly spec conformant.
Version 1.5.4beta08 [June 23, 2011]
Fixed pngvalid if ACCURATE_SCALE is defined.
Updated scripts/pnglibconf.h.prebuilt.
Version 1.5.4rc01 [June 30, 2011]
Define PNG_ALLOCATED to "restrict" only if MSC_VER >= 1400.
Version 1.5.4 [July 7, 2011]
No changes.
Version 1.5.5beta01 [July 13, 2011]
Fixed some typos and made other minor changes in the manual.
Updated contrib/pngminus/makefile.std (Samuli Souminen)
Version 1.5.5beta02 [July 14, 2011]
Revised Makefile.am and Makefile.in to look in the right directory for
pnglibconf.h.prebuilt
Version 1.5.5beta03 [July 27, 2011]
Enabled compilation with g++ compiler. This compiler does not recognize
the file extension, so it always compiles with C++ rules. Made minor
changes to pngrutil.c to cast results where C++ expects it but C does not.
Minor editing of libpng.3 and libpng-manual.txt.
Version 1.5.5beta04 [July 29, 2011]
Revised CMakeLists.txt (Clifford Yapp)
Updated commentary about the png_rgb_to_gray() default coefficients
in the manual and in pngrtran.c
Version 1.5.5beta05 [August 17, 2011]
Prevent unexpected API exports from non-libpng DLLs on Windows. The "_DLL"
is removed from the test of whether a DLL is being built (this erroneously
caused the libpng APIs to be marked as DLL exports in static builds under
Microsoft Visual Studio). Almost all of the libpng building configuration
is moved from pngconf.h to pngpriv.h, but PNG_DLL_EXPORT remains in
src/Source/LibPNG/CHANGES view on Meta::CPAN
removing the 1.14 'compile' script but never checking for it.
Version 1.6.7beta03 [October 19, 2013]
Added ARMv8 support (James Yu <james.yu at linaro.org>). Added file
arm/filter_neon_intrinsics.c; enable with -mfpu=neon.
Revised pngvalid to generate size images with as many filters as it can
manage, limited by the number of rows.
Cleaned up ARM NEON compilation handling. The tests are now in pngpriv.h
and detect the broken GCC compilers.
Version 1.6.7beta04 [October 26, 2013]
Allow clang derived from older GCC versions to use ARM intrinsics. This
causes all clang builds that use -mfpu=neon to use the intrinsics code,
not the assembler code. This has only been tested on iOS 7. It may be
necessary to exclude some earlier clang versions but this seems unlikely.
Changed NEON implementation selection mechanism. This allows assembler
or intrinsics to be turned on at compile time during the build by defining
PNG_ARM_NEON_IMPLEMENTATION to the correct value (2 or 1). This macro
is undefined by default and the build type is selected in pngpriv.h.
Version 1.6.7rc01 [November 2, 2013]
No changes.
Version 1.6.7rc02 [November 7, 2013]
Fixed #include in filter_neon_intrinsics.c and ctype macros. The ctype char
checking macros take an unsigned char argument, not a signed char.
Version 1.6.7 [November 14, 2013]
No changes.
Version 1.6.8beta01 [November 24, 2013]
Moved prototype for png_handle_unknown() in pngpriv.h outside of
the #ifdef PNG_SET_UNKNOWN_CHUNKS_SUPPORTED/#endif block.
Added "-Wall" to CFLAGS in contrib/pngminim/*/makefile
Conditionally compile some unused functions reported by -Wall in
pngminim.
Fixed 'minimal' builds. Various obviously useful minimal configurations
don't build because of missing contrib/libtests test programs and
overly complex dependencies in scripts/pnglibconf.dfa. This change
adds contrib/conftest/*.dfa files that can be used in automatic build
scripts to ensure that these configurations continue to build.
Enabled WRITE_INVERT and WRITE_PACK in contrib/pngminim/encoder.
Fixed pngvalid 'fail' function declaration on the Intel C Compiler.
This reverts to the previous 'static' implementation and works round
the 'unused static function' warning by using PNG_UNUSED().
Version 1.6.8beta02 [November 30, 2013]
Removed or marked PNG_UNUSED some harmless "dead assignments" reported
by clang scan-build.
Changed tabs to 3 spaces in png_debug macros and changed '"%s"m'
to '"%s" m' to improve portability among compilers.
Changed png_free_default() to free() in pngtest.c
Version 1.6.8rc01 [December 12, 2013]
Tidied up pngfix inits and fixed pngtest no-write builds.
Version 1.6.8rc02 [December 14, 2013]
Handle zero-length PLTE chunk or NULL palette with png_error()
instead of png_chunk_report(), which by default issues a warning
rather than an error, leading to later reading from a NULL pointer
(png_ptr->palette) in png_do_expand_palette(). This is CVE-2013-6954
and VU#650142. Libpng-1.6.1 through 1.6.7 are vulnerable.
Libpng-1.6.0 and earlier do not have this bug.
Version 1.6.8 [December 19, 2013]
No changes.
Version 1.6.9beta01 [December 26, 2013]
Bookkeeping: Moved functions around (no changes). Moved transform
function definitions before the place where they are called so that
they can be made static. Move the intrapixel functions and the
grayscale palette builder out of the png?tran.c files. The latter
isn't a transform function and is no longer used internally, and the
former MNG specific functions are better placed in pngread/pngwrite.c
Made transform implementation functions static. This makes the internal
functions called by png_do_{read|write}_transformations static. On an
x86-64 DLL build (Gentoo Linux) this reduces the size of the text
segment of the DLL by 1208 bytes, about 0.6%. It also simplifies
maintenance by removing the declarations from pngpriv.h and allowing
easier changes to the internal interfaces.
Rebuilt configure scripts with automake-1.14.1 and autoconf-2.69
in the tar distributions.
Version 1.6.9beta02 [January 1, 2014]
Added checks for libpng 1.5 to pngvalid.c. This supports the use of
this version of pngvalid in libpng 1.5
Merged with pngvalid.c from libpng-1.7 changes to create a single
pngvalid.c
Removed #error macro from contrib/tools/pngfix.c (Thomas Klausner).
Merged pngrio.c, pngtrans.c, pngwio.c, and pngerror.c with libpng-1.7.0
Merged libpng-1.7.0 changes to make no-interlace configurations work
with test programs.
Revised pngvalid.c to support libpng 1.5, which does not support the
PNG_MAXIMUM_INFLATE_WINDOW option, so #define it out when appropriate in
pngvalid.c
Allow unversioned links created on install to be disabled in configure.
In configure builds 'make install' changes/adds links like png.h
and libpng.a to point to the newly installed, versioned, files (e.g.
libpng17/png.h and libpng17.a). Three new configure options and some
rearrangement of Makefile.am allow creation of these links to be disabled.
Version 1.6.9beta03 [January 10, 2014]
Removed potentially misleading warning from png_check_IHDR().
Version 1.6.9beta04 [January 20, 2014]
Updated scripts/makefile.* to use CPPFLAGS (Cosmin).
Added clang attribute support (Cosmin).
Version 1.6.9rc01 [January 28, 2014]
No changes.
Version 1.6.9rc02 [January 30, 2014]
Quiet an uninitialized memory warning from VC2013 in png_get_png().
Version 1.6.9 [February 6, 2014]
Version 1.6.10beta01 [February 9, 2014]
Backported changes from libpng-1.7.0beta30 and beta31:
Fixed a large number of instances where PNGCBAPI was omitted from
function definitions.
Added pngimage test program for png_read_png() and png_write_png()
src/Source/LibPNG/CHANGES view on Meta::CPAN
run all the png_handle_*() and depend on them to return if info_ptr == NULL.
This improves the performance of png_read_end(png_ptr, NULL) and makes
it more robust against future programming errors.
Check for __has_extension before using it in pngconf.h, to
support older Clang versions (Jeremy Sequoia).
Treat CRC error handling with png_set_crc_action(), instead of with
png_set_benign_errors(), which has been the case since libpng-1.6.0beta18.
Use a user warning handler in contrib/gregbook/readpng2.c instead of default,
so warnings will be put on stderr even if libpng has CONSOLE_IO disabled.
Added png_ptr->process_mode = PNG_READ_IDAT_MODE in png_push_read_chunk
after recognizing the IDAT chunk, which avoids an infinite loop while
reading a datastream whose first IDAT chunk is of zero-length.
This fixes CERT VU#684412 and CVE-2014-0333.
Don't recognize known sRGB profiles as sRGB if they have been hacked,
but don't reject them and don't issue a copyright violation warning.
Version 1.6.10beta03 [February 25, 2014]
Moved some documentation from png.h to libpng.3 and libpng-manual.txt
Minor editing of contrib/arm-neon/README and contrib/examples/*.c
Version 1.6.10rc01 [February 27, 2014]
Fixed typos in the manual and in scripts/pnglibconf.dfa (CFLAGS -> CPPFLAGS
and PNG_USR_CONFIG -> PNG_USER_CONFIG).
Version 1.6.10rc02 [February 28, 2014]
Removed unreachable return statement after png_chunk_error()
in pngrutil.c
Version 1.6.10rc03 [March 4, 2014]
Un-deprecated png_data_freer().
Version 1.6.10 [March 6, 2014]
No changes.
Version 1.6.11beta01 [March 17, 2014]
Use "if (value != 0)" instead of "if (value)" consistently.
Changed ZlibSrcDir from 1.2.5 to 1.2.8 in projects/vstudio.
Moved configuration information from the manual to the INSTALL file.
Version 1.6.11beta02 [April 6, 2014]
Removed #if/#else/#endif from inside two pow() calls in pngvalid.c because
they were handled improperly by Portland Group's PGI-14.1 - PGI-14.3
when using its "__builtin_pow()" function.
Silence 'unused parameter' build warnings (Cosmin Truta).
$(CP) is now used alongside $(RM_F). Also, use 'copy' instead of 'cp'
where applicable, and applied other minor makefile changes (Cosmin).
Don't warn about invalid dimensions exceeding user limits (Cosmin).
Allow an easy replacement of the default pre-built configuration
header with a custom header, via the make PNGLIBCONF_H_PREBUILT
macro (Cosmin).
Version 1.6.11beta03 [April 6, 2014]
Fixed a typo in pngrutil.c, introduced in libpng-1.5.6, that interferes
with "blocky" expansion of sub-8-bit interlaced PNG files (Eric Huss).
Optionally use __builtin_bswap16() in png_do_swap().
Version 1.6.11beta04 [April 19, 2014]
Made progressive reading of interlaced images consistent with the
behavior of the sequential reader and consistent with the manual, by
moving some code out of the PNG_READ_INTERLACING_SUPPORTED blocks. The
row_callback now receives the proper pass number and unexpanded rows, when
png_combine_row() isn't built or used, and png_set_interlace_handling()
is not called.
Allow PNG_sRGB_PROFILE_CHECKING = (-1) to mean no sRGB profile checking.
Version 1.6.11beta05 [April 26, 2014]
Do not reject ICC V2 profiles that lack padding (Kai-Uwe Behrmann).
Relocated closing bracket of the sRGB profile test loop to avoid getting
"Not recognizing known sRGB profile that has been edited" warning for
ICC V2 profiles that lack the MD5 signature in the profile header.
Version 1.6.11beta06 [May 19, 2014]
Added PNG_SKIP_sRGB_CHECK_PROFILE choice for png_set_option().
Version 1.6.11rc01 [May 27, 2014]
No changes.
Version 1.6.11rc02 [June 3, 2014]
Test ZLIB_VERNUM instead of PNG_ZLIB_VERNUM in contrib/tools/pngfix.c
Version 1.6.11 [June 5, 2014]
No changes.
Version 1.6.12rc01 [June 6, 2014]
Relocated new code from 1.6.11beta06 in png.c to a point after the
declarations (Max Stepin).
Version 1.6.12rc02 [June 7, 2014]
Changed file permissions of contrib/tools/intgamma.sh,
test-driver, and compile from 0644 to 0755 (Cosmin).
Version 1.6.12rc03 [June 8, 2014]
Ensure "__has_attribute()" macro exists before trying to use it with
old clang compilers (MacPorts Ticket #43939).
Version 1.6.12 [June 12, 2014]
No changes.
Version 1.6.13beta01 [July 4, 2014]
Quieted -Wsign-compare and -Wclobber compiler warnings in
contrib/pngminus/*.c
Added "(void) png_ptr;" where needed in contrib/gregbook to quiet
compiler complaints about unused pointers.
Split a long output string in contrib/gregbook/rpng2-x.c.
Added "PNG_SET_OPTION" requirement for sRGB chunk support to pnglibconf.dfa,
Needed for write-only support (John Bowler).
Changed "if defined(__ARM_NEON__)" to
"if (defined(__ARM_NEON__) || defined(__ARM_NEON))" (James Wu).
Fixed clang no-warning builds: png_digit was defined but never used.
Version 1.6.13beta02 [July 21, 2014]
Fixed an incorrect separator ("/" should be "\") in scripts/makefile.vcwin32
(bug report from Wolfgang S. Kechel). Bug was introduced in libpng-1.6.11.
Also fixed makefile.bc32, makefile.bor, makefile.msc, makefile.intel, and
makefile.tc3 similarly.
Version 1.6.13beta03 [August 3, 2014]
Removed scripts/makefile.elf. It has not worked since libpng-1.5.0beta14
due to elimination of the PNG_FUNCTION_EXPORT and PNG_DATA_EXPORT
definitions from pngconf.h.
Ensure that CMakeLists.txt makes the target "lib" directory before making
( run in 0.888 second using v1.01-cache-2.11-cpan-5b529ec07f3 )