Added a png_image_write_to_memory() API and a number of assist macros
to allow an application that uses the simplified API write to bypass
stdio and write directly to memory.
Relaxed limit checks on gamma values in pngrtran.c. As suggested in
the comments gamma values outside the range currently permitted
by png_set_alpha_mode are useful for HDR data encoding. These values
are already permitted by png_set_gamma so it is reasonable caution to
extend the png_set_alpha_mode range as HDR imaging systems are starting
to emerge.
Restored "& 0xff" in png_save_uint_16() and png_save_uint_32() that
were accidentally removed from libpng-1.6.17.
Changed PNG_INFO_cHNK and PNG_FREE_cHNK from 0xnnnn to 0xnnnnU in png.h
(Robert C. Seacord).
Added INTEL-SSE2 support (Mike Klein and Matt Sarett, Google, Inc.).
SSE filter speed improvements for bpp=3:
memcpy-free implementations of load3() / store3().
Added PNG_FAST_FILTERS macro (defined as
PNG_FILTER_NONE|PNG_FILTER_SUB|PNG_FILTER_UP).
OBS-URL: https://build.opensuse.org/package/show/graphics/libpng16?expand=0&rev=79
Avoid potential pointer overflow/underflow in png_handle_sPLT() and
png_handle_pCAL() (Bug report by John Regehr).
Fixed incorrect implementation of png_set_PLTE() that uses png_ptr
not info_ptr, that left png_set_PLTE() open to the CVE-2015-8126
vulnerability.
Backported tests from libpng-1.7.0beta69.
Fixed an error in handling of bad zlib CMINFO field in pngfix, found by
American Fuzzy Lop, reported by Brian Carpenter. inflate() doesn't
immediately fault a bad CMINFO field; instead a 'too far back' error
happens later (at least some times). pngfix failed to limit CMINFO to
the allowed values but then assumed that window_bits was in range,
triggering an assert. The bug is mostly harmless; the PNG file cannot
be fixed.
In libpng 1.6 zlib initialization was changed to use the window size
in the zlib stream, not a fixed value. This causes some invalid images,
where CINFO is too large, to display 'correctly' if the rest of the
data is valid. This provides a workaround for zlib versions where the
error arises (ones that support the API change to use the window size
in the stream).
OBS-URL: https://build.opensuse.org/package/show/graphics/libpng16?expand=0&rev=75
Fixed potential leak of png_pixels in contrib/pngminus/pnm2png.c
Fixed uninitialized variable in contrib/gregbook/rpng2-x.c
Fixed the recently reported 1's complement security issue.
Fixed png_save_int_32 when int is not 2's complement by replacing
the value that is illegal in the PNG spec, in both signed and
unsigned values, with 0.
etc., see ANNOUNCE and CHANGES for details
- removed: libpng-rgb_to_gray-checks.patch (upstreamed)
OBS-URL: https://build.opensuse.org/package/show/graphics/libpng16?expand=0&rev=73
Corrected the width limit calculation in png_check_IHDR().
Removed user limits from pngfix. Also pass NULL pointers to
png_read_row to skip the unnecessary row de-interlace stuff.
Implement previously untested cases of libpng transforms in pngvalid.c
Fixed byte order in 2-byte filler, in png_do_read_filler().
Made the check for out-of-range values in png_set_tRNS() detect
values that are exactly 2^bit_depth, and work on 16-bit platforms.
Merged some parts of libpng-1.6.17beta01 and libpng-1.7.0beta47.
Added #ifndef __COVERITY__ where needed in png.c, pngrutil.c and
pngset.c to avoid warnings about dead code.
Do not build png_product2() when it is unused.
Display user limits in the output from pngtest.
Eliminated the PNG_SAFE_LIMITS macro and restored the 1-million-column
and 1-million-row default limits in pnglibconf.dfa, that can be reset
by the user at build time or run time. This provides a more robust
defense against DOS and as-yet undiscovered overflows.
Added PNG_WRITE_CUSTOMIZE_COMPRESSION_SUPPORTED macro, on by default.
Allow user to call png_get_IHDR() with NULL arguments (Reuben Hawkins).
Moved png_set_filter() prototype into a PNG_WRITE_SUPPORTED block
of png.h.
Free the unknown_chunks structure even when it contains no data.
Fixed simplified 8-bit-linear to sRGB alpha. The calculated alpha
value was wrong. It's not clear if this affected the final stored
value; in the obvious code path the upper and lower 8-bits of the
alpha value were identical and the alpha was truncated to 8-bits
rather than dividing by 257 (John Bowler).
OBS-URL: https://build.opensuse.org/package/show/graphics/libpng16?expand=0&rev=67
* Avoid out-of-bounds memory access in png_user_version_check().
* Fixed incorrect handling of the iTXt compression.
* Free all allocated memory in pngimage.
* Fixed array size calculations to avoid warnings.
etc. see ANNOUNCE
OBS-URL: https://build.opensuse.org/package/show/graphics/libpng16?expand=0&rev=61
Bookkeeping: Moved functions around (no changes). Moved transform
function definitions before the place where they are called so that
they can be masde 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.
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
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
OBS-URL: https://build.opensuse.org/package/show/graphics/libpng16?expand=0&rev=51
Changed #ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED in pngpread.c to
#ifdef PNG_SET_UNKNOWN_CHUNKS_SUPPORTED to be consistent with
what is in pngpriv.h.
Moved prototype for png_handle_unknown() in pngpriv.h outside of
the #ifdef PNG_SET_UNKNOWN_CHUNKS_SUPPORTED/#endif block.
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().
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.
OBS-URL: https://build.opensuse.org/package/show/graphics/libpng16?expand=0&rev=49
* Revised unknown chunk code to correct several bugs in the
NO_SAVE_/NO_WRITE combination
* Check user callback behavior in pngunknown.c. Previous versions
compiled if SAVE_UNKNOWN was not available but did nothing since the
callback was never implemented.
* Merged pngunknown.c with 1.7 version and back ported 1.7
improvements/fixes
* Revised pngvalid to generate size images with as many filters as
it can manage, limited by the number of rows.
* ARM improvements/fixes
OBS-URL: https://build.opensuse.org/package/show/graphics/libpng16?expand=0&rev=45
* Added information about png_set_options() to the manual.
* Delay calling png_init_filter_functions() until a row with nonzero
filter is found.
* Fixed inconsistent conditional compilation of
png_chunk_unknown_handling() prototype, definition, and usage.
Made it depend on PNG_HANDLE_AS_UNKNOWN_SUPPORTED everywhere.
OBS-URL: https://build.opensuse.org/package/show/graphics/libpng16?expand=0&rev=41
Updated documentation of 1.5.x to 1.6.x changes in iCCP chunk handling.
Fixed incorrect warning of excess deflate data. End condition - the
warning would be produced if the end of the deflate stream wasn't read
in the last row. The warning is harmless.
Corrected the test on user transform changes on read. It was in the
png_set of the transform function, but that doesn't matter unless the
transform function changes the rowbuf size, and that is only valid if
transform_info is called.
Corrected a misplaced closing bracket in contrib/libtests/pngvalid.c
(Flavio Medeiros).
Corrected length written to uncompressed iTXt chunks (Samuli Suominen).
Added contrib/tools/fixitxt.c, to repair the erroneous iTXt chunk length
written by libpng-1.6.0 and 1.6.1.
Disallow storing sRGB information when the sRGB is not supported.
Merge pngtest.c with libpng-1.7.0
OBS-URL: https://build.opensuse.org/package/show/graphics/libpng16?expand=0&rev=27
Made sRGB check numbers consistent.
Use parentheses more consistently in "#if defined(MACRO)" tests.
Reenabled code to allow zero length PLTE chunks for MNG.
Fixed ALIGNED_MEMORY support.
Avoid a possible memory leak in contrib/gregbook/readpng.c
Better documentation of unknown handling API interactions.
Corrected simplified API default gamma for color-mapped output, added
a flag to change default. In 1.6.0 when the simplified API was used
to produce color-mapped output from an input image with no gamma
information the gamma assumed for the input could be different from
that assumed for non-color-mapped output. In particular 16-bit depth
input files were assumed to be sRGB encoded, whereas in the 'direct'
case they were assumed to have linear data. This was an error. The
fix makes the simplified API treat all input files the same way and
adds a new flag to the png_image::flags member to allow the
application/user to specify that 16-bit files contain sRGB data
rather than the default linear.
etc., see ANNOUNCE or CHANGES for details
- dropped upstreamed
0387-Reenable-code-to-allow-zero-length-PLTE-chunks-for-M.patch
OBS-URL: https://build.opensuse.org/package/show/graphics/libpng16?expand=0&rev=23
- changes from 1.5.x to 1.6.x:
* new simplified api added:
macros:
PNG_FORMAT_*
PNG_IMAGE_*
structures:
png_control
png_image
read functions
png_image_begin_read_from_file()
png_image_begin_read_from_stdio()
png_image_begin_read_from_memory()
png_image_finish_read()
png_image_free()
write functions
png_image_write_to_file()
png_image_write_to_stdio()
* possibility to configure libpng to prefix all exported symbols
(PNG_PREFIX macro)
* no longer include string.h in png.h
* deprecated api:
png_info_init_3()
png_convert_to_rfc1123() which has been replaced
with png_convert_to_rfc1123_buffer()
png_data_freer()
png_malloc_default()
png_free_default()
png_reset_zstream()
* removed api:
OBS-URL: https://build.opensuse.org/package/show/graphics/libpng16?expand=0&rev=16
