diff options
author | John Bowler <jbowler@acm.org> | 2013-02-15 23:21:42 -0600 |
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committer | Glenn Randers-Pehrson <glennrp at users.sourceforge.net> | 2013-02-15 23:21:42 -0600 |
commit | 9d2e875826323fb34b27b8da7fc11b740b953a59 (patch) | |
tree | bc538378d56a5be17160b1e73ecf5c41f9afcbf7 | |
parent | 681de8c8dc057fef32bfde6b4dc13403c67e368a (diff) | |
download | libpng-9d2e875826323fb34b27b8da7fc11b740b953a59.tar.gz |
[libpng16] Made symbol prefixing work with the ARM neon optimizations. Also allow pngpriv.h
to be included for preprocessor definitions only, so it can be used in non-C/C++
files. Back ported from libpng 1.7.
-rw-r--r-- | ANNOUNCE | 611 | ||||
-rw-r--r-- | CHANGES | 5 | ||||
-rw-r--r-- | arm/filter_neon.S | 4 | ||||
-rw-r--r-- | pngpriv.h | 79 |
4 files changed, 60 insertions, 639 deletions
@@ -1,5 +1,5 @@ -Libpng 1.6.1beta01 - February 14, 2013 +Libpng 1.6.1beta01 - February 16, 2013 This is not intended to be a public release. It will be replaced within a few weeks by a public version or by another test version. @@ -23,611 +23,12 @@ Other information: 1.6.1beta01-README.txt 1.6.1beta01-LICENSE.txt -Changes since the last public release (1.5.7): +Changes since the last public release (1.6.0): -Version 1.6.0beta01 [December 15, 2011] - Removed machine-generated configure files from the GIT repository (they will - continue to appear in the tarball distributions). - Restored the new 'simplified' API, which was started in libpng-1.5.7beta02 - but later deleted from libpng-1.5.7beta05. - Added example programs for the new 'simplified' API. - Added ANSI-C (C90) headers and require them, and take advantage of the - change. Also fixed some of the projects/* and contrib/* files that needed - updates for libpng16 and the move of pngvalid.c. - With this change the required ANSI-C header files are assumed to exist: the - implementation must provide float.h, limits.h, stdarg.h and stddef.h and - libpng relies on limits.h and stddef.h existing and behaving as defined - (the other two required headers aren't used). Non-ANSI systems that don't - have stddef.h or limits.h will have to provide an appropriate fake - containing the relevant types and #defines. - The use of FAR/far has been eliminated and the definition of png_alloc_size_t - is now controlled by a flag so that 'small size_t' systems can select it - if necessary. Libpng 1.6 may not currently work on such systems -- it - seems likely that it will ask 'malloc' for more than 65535 bytes with any - image that has a sufficiently large row size (rather than simply failing - to read such images). - New tools directory containing tools used to generate libpng code. - Fixed race conditions in parallel make builds. With higher degrees of - parallelism during 'make' the use of the same temporary file names such - as 'dfn*' can result in a race where a temporary file from one arm of the - build is deleted or overwritten in another arm. This changes the - temporary files for suffix rules to always use $* and ensures that the - non-suffix rules use unique file names. - -Version 1.6.0beta02 [December 21, 2011] - Correct configure builds where build and source directories are separate. - The include path of 'config.h' was erroneously made relative in pngvalid.c - in libpng 1.5.7. - -Version 1.6.0beta03 [December 22, 2011] - Start-up code size improvements, error handler flexibility. These changes - alter how the tricky allocation of the initial png_struct and png_info - structures are handled. png_info is now handled in pretty much the same - way as everything else, except that the allocations handle NULL return - silently. png_struct is changed in a similar way on allocation and on - deallocation a 'safety' error handler is put in place (which should never - be required). The error handler itself is changed to permit mismatches - in the application and libpng error buffer size; however, this means a - silent change to the API to return the jmp_buf if the size doesn't match - the size from the libpng compilation; libpng now allocates the memory and - this may fail. Overall these changes result in slight code size - reductions; however, this is a reduction in code that is always executed - so is particularly valuable. Overall on a 64-bit system the libpng DLL - decreases in code size by 1733 bytes. pngerror.o increases in size by - about 465 bytes because of the new functionality. - Added png_convert_to_rfc1123_buffer() and deprecated png_convert_to_rfc1123() - to avoid including a spurious buffer in the png_struct. - -Version 1.6.0beta04 [December 30, 2011] - Regenerated configure scripts with automake-1.11.2 - Eliminated png_info_destroy(). It is now used only in png.c and only calls - one other internal function and memset(). - Enabled png_get_sCAL_fixed() if floating point APIs are enabled. Previously - it was disabled whenever internal fixed point arithmetic was selected, - which meant it didn't exist even on systems where FP was available but not - preferred. - Added pngvalid.c compile time checks for const APIs. - Implemented 'restrict' for png_info and png_struct. Because of the way - libpng works both png_info and png_struct are always accessed via a - single pointer. This means adding C99 'restrict' to the pointer gives - the compiler some opportunity to optimize the code. This change allows - that. - Moved AC_MSG_CHECKING([if libraries can be versioned]) later to the proper - location in configure.ac (Gilles Espinasse). - Changed png_memcpy to C assignment where appropriate. Changed all those - uses of png_memcpy that were doing a simple assignment to assignments - (all those cases where the thing being copied is a non-array C L-value). - Added some error checking to png_set_*() routines. - Removed the reference to the non-exported function png_memcpy() from - example.c. - Fixed the Visual C 64-bit build - it requires jmp_buf to be aligned, but - it had become misaligned. - Revised contrib/pngminus/pnm2png.c to avoid warnings when png_uint_32 - and unsigned long are of different sizes. - -Version 1.6.0beta05 [January 15, 2012] - Updated manual with description of the simplified API (copied from png.h) - Fix bug in pngerror.c: some long warnings were being improperly truncated - (CVE-2011-3464, bug introduced in libpng-1.5.3beta05). - -Version 1.6.0beta06 [January 24, 2012] - Added palette support to the simplified APIs. This commit - changes some of the macro definitions in png.h, app code - may need corresponding changes. - Increased the formatted warning buffer to 192 bytes. - Added color-map support to simplified API. This is an initial version for - review; the documentation has not yet been updated. - Fixed Min/GW uninstall to remove libpng.dll.a - -Version 1.6.0beta07 [January 28, 2012] - Eliminated Intel icc/icl compiler warnings. The Intel (GCC derived) - compiler issues slightly different warnings from those issued by the - current vesions of GCC. This eliminates those warnings by - adding/removing casts and small code rewrites. - Updated configure.ac from autoupdate: added --enable-werror option. - Also some layout regularization and removal of introduced tab characters - (replaced with 3-character indentation). Obsolete macros identified by - autoupdate have been removed; the replacements are all in 2.59 so - the pre-req hasn't been changed. --enable-werror checks for support - for -Werror (or the given argument) in the compiler. This mimics the - gcc configure option by allowing -Werror to be turned on safely; without - the option the tests written in configure itself fail compilation because - they cause compiler warnings. - Rewrote autogen.sh to run autoreconf instead of running tools one-by-one. - Conditionalize the install rules for MINGW and CYGWIN in CMakeLists.txt and - set CMAKE_LIBRARY_OUTPUT_DIRECTORY to "lib" on all platforms (C. Yapp). - Freeze libtool files in the 'scripts' directory. This version of autogen.sh - attempts to dissuade people from running it when it is not, or should not, - be necessary. In fact, autogen.sh does not work when run in a libpng - directory extracted from atar distribution anymore. You must run it in - a GIT clone instead. - Added two images to contrib/pngsuite (1-bit and 2-bit transparent grayscale), - and renamed three whose names were inconsistent with those in - pngsuite/README.txt. - -Version 1.6.0beta08 [February 1, 2012] - Fixed Image::colormap misalignment in pngstest.c - Check libtool/libtoolize version number (2.4.2) in configure.ac - Divide test-pngstest.sh into separate pngstest runs for basic and - transparent images. - Moved automake options to AM_INIT_AUTOMAKE in configure.ac - Added color-tests, silent-rules (Not yet implemented in Makefile.am) and - version checking to configure.ac - Improved pngstest speed by not doing redundant tests and add const to - the background parameter of png_image_finish_read. The --background - option is now done automagically only when required, so that commandline - option no longer exists. - Cleaned up pngpriv.h to consistently declare all functions and data. - Also eliminated PNG_CONST_DATA, which is apparently not needed but we - can't be sure until it is gone. - Added symbol prefixing that allows all the libpng external symbols - to be prefixed (suggested by Reuben Hawkins). - Updated "ftbb*.png" list in the owatcom and vstudio projects. - Fixed 'prefix' builds on clean systems. The generation of pngprefix.h - should not require itself. - Updated INSTALL to explain that autogen.sh must be run in a GIT clone, - not in a libpng directory extracted from a tar distribution. - -Version 1.6.0beta09 [February 1, 2012] - Reverted the prebuilt configure files to libpng-1.6.0beta05 condition. - -Version 1.6.0beta10 [February 3, 2012] - Added Z_SOLO for zlib-1.2.6+ and correct pngstest tests - Updated list of test images in CMakeLists.txt - Updated the prebuilt configure files to current condition. - Revised INSTALL information about autogen.sh; it works in tar distributions. - -Version 1.6.0beta11 [February 16, 2012] - Fix character count in pngstest command in projects/owatcom/pngstest.tgt - Revised test-pngstest.sh to report PASS/FAIL for each image. - Updated documentation about the simplified API. - Corrected estimate of error in libpng png_set_rgb_to_gray API. The API is - extremely inaccurate for sRGB conversions because it uses an 8-bit - intermediate linear value and it does not use the sRGB transform, so it - suffers from the known instability in gamma transforms for values close - to 0 (see Poynton). The net result is that the calculation has a maximum - error of 14.99/255; 0.5/255^(1/2.2). pngstest now uses 15 for the - permitted 8-bit error. This may still not be enough because of arithmetic - error. - Removed some unused arrays (with #ifdef) from png_read_push_finish_row(). - Fixed a memory overwrite bug in simplified read of RGB PNG with - non-linear gamma Also bugs in the error checking in pngread.c and changed - quite a lot of the checks in pngstest.c to be correct; either correctly - written or not over-optimistic. The pngstest changes are insufficient to - allow all possible RGB transforms to be passed; pngstest cmppixel needs - to be rewritten to make it clearer which errors it allows and then changed - to permit known inaccuracies. - Removed tests for no-longer-used *_EMPTY_PLTE_SUPPORTED from pngstruct.h - Fixed fixed/float API export conditionals. 1) If FIXED_POINT or - FLOATING_POINT options were switched off, png.h ended up with lone ';' - characters. This is not valid ANSI-C outside a function. The ';' - characters have been moved inside the definition of PNG_FP_EXPORT and - PNG_FIXED_EXPORT. 2) If either option was switched off, the declaration - of the corresponding functions were completely omitted, even though some - of them are still used internally. The result is still valid, but - produces warnings from gcc with some warning options (including -Wall). The - fix is to cause png.h to declare the functions with PNG_INTERNAL_FUNCTION - when png.h is included from pngpriv.h. - Check for invalid palette index while reading paletted PNG. When one is - found, issue a warning and increase png_ptr->num_palette accordingly. - Apps are responsible for checking to see if that happened. - -Version 1.6.0beta12 [February 18, 2012] - Do not increase num_palette on invalid_index. - Relocated check for invalid palette index to pngrtran.c, after unpacking - the sub-8-bit pixels. - Fixed CVE-2011-3026 buffer overrun bug. Deal more correctly with the test - on iCCP chunk length. Also removed spurious casts that may hide problems - on 16-bit systems. - -Version 1.6.0beta13 [February 24, 2012] - Eliminated redundant png_push_read_tEXt|zTXt|iTXt|unknown code from - pngpread.c and use the sequential png_handle_tEXt, etc., in pngrutil.c; - now that png_ptr->buffer is inaccessible to applications, the special - handling is no longer useful. - Added PNG_SAFE_LIMITS feature to pnglibconf.dfa, pngpriv.h, and new - pngusr.dfa to reset the user limits to safe ones if PNG_SAFE_LIMITS is - defined. To enable, use "CPPFLAGS=-DPNG_SAFE_LIMITS_SUPPORTED=1" on the - configure command or put #define PNG_SAFE_LIMITS_SUPPORTED in - pnglibconf.h.prebuilt and pnglibconf.h. - -Version 1.6.0beta14 [February 27, 2012] - Added information about the new limits in the manual. - Updated Makefile.in - -Version 1.6.0beta15 [March 2, 2012] - Removed unused "current_text" members of png_struct and the png_free() - of png_ptr->current_text from pngread.c - Rewrote pngstest.c for substantial speed improvement. - Fixed transparent pixel and 16-bit rgb tests in pngstest and removed a - spurious check in pngwrite.c - Added PNG_IMAGE_FLAG_FAST for the benefit of applications that store - intermediate files, or intermediate in-memory data, while processing - image data with the simplified API. The option makes the files larger - but faster to write and read. pngstest now uses this by default; this - can be disabled with the --slow option. - Improved pngstest fine tuning of error numbers, new test file generator. - The generator generates images that test the full range of sample values, - allow the error numbers in pngstest to be tuned and checked. makepng - also allows generation of images with extra chunks, although this is - still work-in-progress. - Added tests for invalid palette index while reading and writing (work in - progress, the latter isn't finished). - Fixed some bugs in ICC profile writing. The code should now accept - all potentially valid ICC profiles and reject obviously invalid ones. - It now uses png_error() to do so rather than casually writing a PNG - without the necessary color data. - Removed whitespace from the end of lines in all source files and scripts. - -Version 1.6.0beta16 [March 6, 2012] - Relocated palette-index checking function from pngrutil.c to pngtrans.c - Added palette-index checking while writing. - Changed png_inflate() and calling routines to avoid overflow problems. - This is an intermediate check-in that solves the immediate problems and - introduces one performance improvement (avoiding a copy via png_ptr->zbuf.) - Further changes will be made to make ICC profile handling more secure. - Fixed build warnings (MSVC, GCC, GCC v3). Cygwin GCC with default options - declares 'index' as a global, causing a warning if it is used as a local - variable. GCC 64-bit warns about assigning a (size_t) (unsigned 64-bit) - to an (int) (signed 32-bit). MSVC, however, warns about using the - unary '-' operator on an unsigned value (even though it is well defined - by ANSI-C to be ~x+1). The padding calculation was changed to use a - different method. Removed the tests on png_ptr->pass. - Added contrib/libtests/tarith.c to test internal arithmetic functions from - png.c. This is a libpng maintainer program used to validate changes to the - internal arithmetic functions. - Made read 'inflate' handling like write 'deflate' handling. The read - code now claims and releases png_ptr->zstream, like the write code. - The bug whereby the progressive reader failed to release the zstream - is now fixed, all initialization is delayed, and the code checks for - changed parameters on deflate rather than always calling - deflatedEnd/deflateInit. - Validate the zTXt strings in pngvalid. - Added code to validate the windowBits value passed to deflateInit2(). - If the call to deflateInit2() is wrong a png_warning will be issued - (in fact this is harmless, but the PNG data produced may be sub-optimal). - -Version 1.6.0beta17 [March 10, 2012] - Fixed PNG_LIBPNG_BUILD_BASE_TYPE definition. - Reject all iCCP chunks after the first, even if the first one is invalid. - Deflate/inflate was reworked to move common zlib calls into single - functions [rw]util.c. A new shared keyword check routine was also added - and the 'zbuf' is no longer allocated on progressive read. It is now - possible to call png_inflate() incrementally. - If benign errors are disabled use maximum window on ancilliary inflate. - This works round a bug introduced in 1.5.4 where compressed ancillary - chunks could end up with a too-small windowBits value in the deflate - header. - -Version 1.6.0beta18 [March 16, 2012] - Issue a png_benign_error() instead of png_warning() about bad palette index. - In pngtest, treat benign errors as errors if "-strict" is present. - Fixed an off-by-one error in the palette index checking function. - Fixed a compiler warning under Cygwin (Windows-7, 32-bit system) - Revised example.c to put text strings in a temporary character array - instead of directly assigning string constants to png_textp members. - This avoids compiler warnings when -Wwrite-strings is enabled. - Added output flushing to aid debugging under Visual Studio. Unfortunately - this is necessary because the VS2010 output window otherwise simply loses - the error messages on error (they weren't flushed to the window before - the process exited, apparently!) - Added configuration support for benign errors and changed the read - default. Also changed some warnings in the iCCP and sRGB handling - from to benign errors. Configuration now makes read benign - errors warnings and write benign errors to errors by default (thus - changing the behavior on read). The simplified API always forces - read benign errors to warnings (regardless of the system default, unless - this is disabled in which case the simplified API can't be built.) - -Version 1.6.0beta19 [March 18,2012] - Work around for duplicate row start calls; added warning messages. - This turns on PNG_FLAG_DETECT_UNINITIALIZED to detect app code that - fails to call one of the 'start' routines (not enabled in libpng-1.5 - because it is technically an API change, since it did normally work - before.) It also makes duplicate calls to png_read_start_row (an - internal function called at the start of the image read) benign, as - they were before changes to use png_inflate_claim. Somehow webkit is - causing this to happen; this is probably a mis-feature in the zlib - changes so this commit is only a work-round. - Removed erroneous setting of DETECT_UNINITIALIZED and added more - checks. The code now does a png_error if an attempt is made to do the - row initialization twice; this is an application error and it has - serious consequences because the transform data in png_struct is - changed by each call. - Added application error reporting and added chunk names to read - benign errors; also added --strict to pngstest - not enabled - yet because a warning is produced. - Avoid the double gamma correction warning in the simplified API. - This allows the --strict option to pass in the pngstest checks - -Version 1.6.0beta20 [March 29, 2012] - Changed chunk handler warnings into benign errors, incrementally load iCCP - Added checksum-icc.c to contrib/tools - Prevent PNG_EXPAND+PNG_SHIFT doing the shift twice. - Recognize known sRGB ICC profiles while reading; prefer writing the - iCCP profile over writing the sRGB chunk, controlled by the - PNG_sRGB_PROFILE_CHECKS option. - Revised png_set_text_2() to avoid potential memory corruption (fixes - CVE-2011-3048, also known as CVE-2012-3425). - -Version 1.6.0beta21 [April 27, 2012] - Revised scripts/makefile.darwin: use system zlib; remove quotes around - architecture list; add missing ppc architecture; add architecture options - to shared library link; don't try to create a shared lib based on missing - RELEASE variable. - Enable png_set_check_for_invalid_index() for both read and write. - Removed #ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED in pngpriv.h around - declaration of png_handle_unknown(). - Added -lssp_nonshared in a comment in scripts/makefile.freebsd - and changed deprecated NOOBJ and NOPROFILE to NO_OBJ and NO_PROFILE. - -Version 1.6.0beta22 [May 23, 2012] - Removed need for -Wno-cast-align with clang. clang correctly warns on - alignment increasing pointer casts when -Wcast-align is passed. This - fixes the cases that clang warns about either by eliminating the - casts from png_bytep to png_uint_16p (pngread.c), or, for pngrutil.c - where the cast is previously verified or pngstest.c where it is OK, by - introducing new png_aligncast macros to do the cast in a way that clang - accepts. - -Version 1.6.0beta23 [June 6, 2012] - Revised CMakeLists.txt to not attempt to make a symlink under mingw. - Made fixes for new optimization warnings from gcc 4.7.0. The compiler - performs an optimization which is safe; however it then warns about it. - Changing the type of 'palette_number' in pngvalid.c removes the warning. - Do not depend upon a GCC feature macro being available for use in generating - the linker mapfile symbol prefix. - Improved performance of new do_check_palette_indexes() function (only - update the value when it actually increases, move test for whether - the check is wanted out of the function. - -Version 1.6.0beta24 [June 7, 2012] - Don't check palette indexes if num_palette is 0 (as it can be in MNG files). - -Version 1.6.0beta25 [June 16, 2012] - Revised png_set_keep_unknown_chunks() so num_chunks < 0 means ignore all - unknown chunks and all known chunks except for IHDR, PLTE, tRNS, IDAT, - and IEND. Previously it only meant ignore all unknown chunks, the - same as num_chunks == 0. Revised png_image_skip_unused_chunks() to - provide a list of chunks to be processed instead of a list of chunks to - ignore. Revised contrib/gregbook/readpng2.c accordingly. - -Version 1.6.0beta26 [July 10, 2012] - Removed scripts/makefile.cegcc from the *.zip and *.7z distributions; it - depends on configure, which is not included in those archives. - Moved scripts/chkfmt to contrib/tools. - Changed "a+w" to "u+w" in Makefile.in to fix CVE-2012-3386. - -Version 1.6.0beta27 [August 11, 2012] - Do not compile PNG_DEPRECATED, PNG_ALLOC and PNG_PRIVATE when __GNUC__ < 3. - Do not use __restrict when GNUC is <= 3.1 - Removed references to png_zalloc() and png_zfree() from the manual. - Fixed configurations where floating point is completely disabled. Because - of the changes to support symbol prefixing PNG_INTERNAL_FUNCTION declares - floating point APIs during libpng builds even if they are completely - disabled. This requires the png floating point types (png_double*) to be - declared even though the functions are never actually defined. This - change provides a dummy definition so that the declarations work, yet any - implementation will fail to compile because of an incomplete type. - Re-eliminated the use of strcpy() in pngtest.c. An unncessary use of - strcpy() was accidentally re-introduced in libpng16; this change replaces - it with strncpy(). - Eliminated use of png_sizeof(); use sizeof() instead. - Use a consistent style for (sizeof type) and (sizeof (array)) - Cleanup of png_set_filler(). This function does very different things on - read and write. In libpng 1.6 the two cases can be distinguished and - considerable code cleanup, and extra error checking, is possible. This - makes calls on the write side that have no effect be ignored with a - png_app_error(), which can be disabled in the app using - png_set_benign_errors(), and removes the spurious use of usr_channels - on the read side. - Insist on autotools 1.12.1 for git builds because there are security issues - with 1.12 and insisting on anything less would allow 1.12 to be used. - Removed info_ptr->signature[8] from WRITE-only builds. - Add some conditions for compiling png_fixed(). This is a small function - but it requires "-lm" on some platforms. - Cause pngtest --strict to fail on any warning from libpng (not just errors) - and cause it not to fail at the comparison step if libpng lacks support - for writing chunks that it reads from the input (currently only implemented - for compressed text chunks). - Make all three "make check" test programs work without READ or WRITE support. - Now "make check" will succeed even if libpng is compiled with -DPNG_NO_READ - or -DPNG_NO_WRITE. The tests performed are reduced, but the basic reading - and writing of a PNG file is always tested by one or more of the tests. - Consistently use strlen(), memset(), memcpy(), and memcmp() instead of the - png_strlen(), png_memset(), png_memcpy(), and png_memcmp() macros. - Removed the png_sizeof(), png_strlen(), png_memset(), png_memcpy(), and - png_memcmp() macros. - Work around gcc 3.x and Microsoft Visual Studio 2010 complaints. Both object - to the split initialization of num_chunks. - -Version 1.6.0beta28 [August 29, 2012] - Unknown handling fixes and clean up. This adds more correct option - control of the unknown handling, corrects the pre-existing bug where - the per-chunk 'keep' setting is ignored and makes it possible to skip - IDAT chunks in the sequential reader (broken in earlier 1.6 versions). - There is a new test program, test-unknown.c, which is a work in progress - (not currently part of the test suite). Comments in the header files now - explain how the unknown handling works. - Allow fine grain control of unknown chunk APIs. This change allows - png_set_keep_unknown_chunks() to be turned off if not required and causes - both read and write to behave appropriately (on read this is only possible - if the user callback is used to handle unknown chunks). The change - also removes the support for storing unknown chunks in the info_struct - if the only unknown handling enabled is via the callback, allowing libpng - to be configured with callback reading and none of the unnecessary code. - Corrected fix for unknown handling in pngtest. This reinstates the - libpng handling of unknown chunks other than vpAg and sTER (including - unsafe-to-copy chunks which were dropped before) and eliminates the - repositioning of vpAg and sTER in pngtest.png by changing pngtest.png - (so the chunks are where libpng would put them). - Added "tunknown" test and corrected a logic error in png_handle_unknown() - when SAVE support is absent. Moved the shell test scripts for - contrib/libtests from the libpng top directory to contrib/libtests. - png_handle_unknown() must always read or skip the chunk, if - SAVE_UNKNOWN_CHUNKS is turned off *and* the application does not set - a user callback an unknown chunk will not be read, leading to a read - error, which was revealed by the "tunknown" test. - Cleaned up and corrected ICC profile handling. - contrib/libtests/makepng: corrected 'rgb' and 'gray' cases. profile_error - messages could be truncated; made a correct buffer size calculation and - adjusted pngerror.c appropriately. png_icc_check_* checking improved; - changed the functions to receive the correct color type of the PNG on read - or write and check that it matches the color space of the profile (despite - what the comments said before, there is danger in assuming the app will - cope correctly with an RGB profile on a grayscale image and, since it - violates the PNG spec, allowing it is certain to produce inconsistent - app behavior and might even cause app crashes.) Check that profiles - contain the tags needed to process the PNG (tags all required by the ICC - spec). Removed unused PNG_STATIC from pngpriv.h. - -Version 1.6.0beta29 [September 4, 2012] - Fixed the simplified API example programs and improved the error message - if the version field is not set. - Added contrib/examples/* to the *.zip and *.7z distributions. - Updated simplified API synopses and description of the png_image structure - in the manual. - Made makepng and pngtest produce identical PNGs, add "--relaxed" option - to pngtest. The "--relaxed" option turns off the benign errors that are - enabled by default in pre-RC builds. makepng can now write ICC profiles - where the length has not been extended to a multiple of 4, and pngtest - now intercepts all libpng errors, allowing the previously-introduced - "--strict test" on no warnings to actually work. - Improved ICC profile handling including cHRM chunk generation and fixed - Cygwin+MSVC build errors. The ICC profile handling now includes more - checking. Several errors that caused rejection of the profile are now - handled with a warning in such a way that the invalid profiles will be - read by default in release (but not pre-RC) builds but will not be - written by default. The easy part of handling the cHRM chunk is written, - where the ICC profile contains the required data. The more difficult - part plus guessing a gAMA value requires code to pass selected RGB values - through the profile. - -Version 1.6.0beta30 [October 24, 2012] - Changed ICC profile matrix/vector types to not depend on array type rules. - By the ANSI-C standard the new types should be identical to the previous - versions, and all known versions of gcc tested with the previous versions - except for GCC-4.2.1 work with this version. The change makes the ANSI-C - rule that const applied to an array of elements applies instead to the - elements in the array moot by explicitly applying const to the base - elements of the png_icc_matrix and png_icc_vector types. The accidental - (harmless) 'const' previously applied to the parameters of two of the - functions have also been removed. - Added a work around for GCC 4.2 optimization bug. - Marked the broken (bad white point) original HP sRGB profiles correctly and - correct comments. - Added -DZ_SOLO to contrib/pngminim/*/makefile to work with zlib-1.2.7 - Use /MDd for vstudio debug builds. Also added pngunkown to the vstudio - builds, fixed build errors and corrected a minor exit code error in - pngvalid if the 'touch' file name is invalid. - Add updated WARNING file to projects/vstudio from libpng 1.5/vstudio - Fixed build when using #define PNG_NO_READ_GAMMA in png_do_compose() in - pngrtran.c (Domani Hannes). - -Version 1.6.0beta31 [November 1, 2012] - Undid the erroneous change to vstudio/pngvalid build in libpng-1.6.0beta30. - Made pngvalid so that it will build outside the libpng source tree. - Made builds -DPNG_NO_READ_GAMMA compile (the unit tests still fail). - Made PNG_NO_READ_GAMMA switch off interfaces that depend on READ_GAMMA. - Prior to 1.6.0 switching off READ_GAMMA did unpredictable things to the - interfaces that use it (specifically, png_do_background in 1.4 would - simply display composite for grayscale images but do composition - with the incorrect arithmetic for color ones). In 1.6 the semantic - of -DPNG_NO_READ_GAMMA is changed to simply disable any interface that - depends on it; this obliges people who set it to consider whether they - really want it off if they happen to use any of the interfaces in - question (typically most users who disable it won't). - Fixed GUIDs in projects/vstudio. Some were duplicated or missing, - resulting in VS2010 having to update the files. - Removed non-working ICC profile support code that was mostly added to - libpng-1.6.0beta29 and beta30. There was too much code for too little - gain; implementing full ICC color correction may be desireable but is left - up to applications. - -Version 1.6.0beta32 [November 25, 2012] - Fixed an intermittent SEGV in pngstest due to an uninitialized array element. - Added the ability for contrib/libtests/makepng.c to make a PNG with just one - color. This is useful for debugging pngstest color inaccuracy reports. - Fixed error checking in the simplified write API (Olaf van der Spek) - Made png_user_version_check() ok to use with libpng version 1.10.x and later. - -Version 1.6.0beta33 [December 15, 2012] - Fixed typo in png.c (PNG_SET_CHUNK_MALLOC_MAX should be PNG_CHUNK_MALLOC_MAX) - that causes the MALLOC_MAX limit not to work (John Bowler) - Change png_warning() to png_app_error() in pngwrite.c and comment the - fall-through condition. - Change png_warning() to png_app_warning() in png_write_tRNS(). - Rearranged the ARM-NEON optimizations: Isolated the machine specific code - to the hardware subdirectory and added comments to pngrutil.c so that - implementors of other optimizations know what to do. - Fixed cases of unquoted DESTDIR in Makefile.am - Rebuilt Makefile.in, etc., with autoconf-2.69 and automake-1.12.5. - -Version 1.6.0beta34 [December 19, 2012] - Cleaned up whitespace in the synopsis portion of the manpage "libpng.3" - Disassembled the version number in scripts/options.awk (necessary for - building on SunOs). - -Version 1.6.0beta35 [December 23, 2012] - Made default Zlib compression settings be configurable. This adds #defines to - pnglibconf.h to control the defaults. - Fixed Windows build issues, enabled ARM compilation. Various warnings issued - by earlier versions of GCC fixed for Cygwin and Min/GW (which both use old - GCCs.) ARM support is enabled by default in zlib.props (unsupported by - Microsoft) and ARM compilation is made possible by deleting the check for - x86. The test programs cannot be run because they are not signed. - -Version 1.6.0beta36 [January 2, 2013] - Discontinued distributing libpng-1.x.x.tar.bz2. - Discontinued distributing libpng-1.7.0-1.6.0-diff.txt and similar. - Rebuilt configure with autoconf-2.69 (inadvertently not done in beta33) - Fixed 'make distcheck' on SUN OS - libpng.so was not being removed - -Version 1.6.0beta37 [January 10, 2013] - Fixed conceivable but difficult to repro overflow. Also added two test - programs to generate and test a PNG which should have the problem. - -Version 1.6.0beta39 [January 19, 2013] - Again corrected attempt at overflow detection in png_set_unknown_chunks(). - Added overflow detection in png_set_sPLT() and png_set_text_2(). - -Version 1.6.0beta40 [January 20, 2013] - Use consistent handling of overflows in text, sPLT and unknown png_set_* APIs - -Version 1.6.0rc01 [January 26, 2013] - No changes. - -Version 1.6.0rc02 [February 4, 2013] - Added png_get_palette_max() function. - -Version 1.6.0rc03 [February 5, 2013] - Fixed the png_get_palette_max API. - -Version 1.6.0rc04 [February 7, 2013] - Turn serial tests back on (recently turned off by autotools upgrade). - -Version 1.6.0rc05 [February 8, 2013] - Update manual about png_get_palette_max(). - -Version 1.6.0rc06 [February 9, 2013] - Fixed missing dependency in --prefix builds The intermediate - internal 'prefix.h' file can only be generated correctly after - pnglibconf.h, however the dependency was not in Makefile.am. The - symptoms are unpredictable depending on the order make chooses to - build pngprefix.h and pnglibconf.h, often the error goes unnoticed - because there is a system pnglibconf.h to use instead. - -Version 1.6.0rc07 [February 10, 2013] - Enclosed the new png_get_palette_max in #ifdef PNG_GET_PALETTE_MAX_SUPPORTED - block, and revised pnglibconf.h and pnglibconf.h.prebuilt accordingly. - -Version 1.6.0rc08 [February 10, 2013] - Fix typo in png.h #ifdef - -Version 1.6.0 [February 14, 2013] - No changes. - -Version 1.6.1 [February 14, 2013] +Version 1.6.1 [February 16, 2013] + Made symbol prefixing work with the ARM neon optimizations. Also allow pngpriv.h + to be included for preprocessor definitions only, so it can be used in non-C/C++ + files. Back ported from libpng 1.7. Send comments/corrections/commendations to png-mng-implement at lists.sf.net (subscription required; visit @@ -4381,7 +4381,10 @@ Version 1.6.0rc08 [February 10, 2013] Version 1.6.0 [February 14, 2013] No changes. -Version 1.6.1 [February 14, 2013] +Version 1.6.1 [February 16, 2013] + Made symbol prefixing work with the ARM neon optimizations. Also allow pngpriv.h + to be included for preprocessor definitions only, so it can be used in non-C/C++ + files. Back ported from libpng 1.7. Send comments/corrections/commendations to png-mng-implement at lists.sf.net (subscription required; visit diff --git a/arm/filter_neon.S b/arm/filter_neon.S index 4aa500cd7..55ca3f292 100644 --- a/arm/filter_neon.S +++ b/arm/filter_neon.S @@ -10,6 +10,10 @@ * and license in png.h */ +/* This is required to get the symbol renames, which are #defines */ +#define PNG_VERSION_INFO_ONLY +#include "../pngpriv.h" + #ifdef __arm__ #if defined(__linux__) && defined(__ELF__) .section .note.GNU-stack,"",%progbits /* mark stack as non-executable */ @@ -39,9 +39,11 @@ */ #define _POSIX_SOURCE 1 /* Just the POSIX 1003.1 and C89 APIs */ +#ifndef PNG_VERSION_INFO_ONLY /* Standard library headers not required by png.h: */ -#include <stdlib.h> -#include <string.h> +# include <stdlib.h> +# include <string.h> +#endif #define PNGLIB_BUILD /*libpng is being built, not used*/ @@ -177,10 +179,12 @@ # ifndef PNG_FLOATING_POINT_SUPPORTED # define PNG_FP_EXPORT(ordinal, type, name, args)\ PNG_INTERNAL_FUNCTION(type, name, args, PNG_EMPTY); - typedef struct png_incomplete png_double; - typedef png_double* png_doublep; - typedef const png_double* png_const_doublep; - typedef png_double** png_doublepp; +# ifndef PNG_VERSION_INFO_ONLY + typedef struct png_incomplete png_double; + typedef png_double* png_doublep; + typedef const png_double* png_const_doublep; + typedef png_double** png_doublepp; +# endif # endif #endif #ifndef PNG_FIXED_EXPORT @@ -191,8 +195,6 @@ #endif #include "png.h" -#include "pngstruct.h" -#include "pnginfo.h" /* pngconf.h does not set PNG_DLL_EXPORT unless it is required, so: */ #ifndef PNG_DLL_EXPORT @@ -238,11 +240,6 @@ # endif #endif -/* This is used for 16 bit gamma tables -- only the top level pointers are - * const; this could be changed: - */ -typedef const png_uint_16p * png_const_uint_16pp; - /* Moved to pngpriv.h at libpng-1.5.0 */ /* NOTE: some of these may have been used in external applications as * these definitions were exposed in pngconf.h prior to 1.5. @@ -331,6 +328,7 @@ typedef const png_uint_16p * png_const_uint_16pp; # define PNGFAPI /* PRIVATE */ #endif +#ifndef PNG_VERSION_INFO_ONLY /* Other defines specific to compilers can go here. Try to keep * them inside an appropriate ifdef/endif pair for portability. */ @@ -375,6 +373,7 @@ typedef const png_uint_16p * png_const_uint_16pp; defined(_WIN32) || defined(__WIN32__) # include <windows.h> /* defines _WINDOWS_ macro */ #endif +#endif /* PNG_VERSION_INFO_ONLY */ /* Moved here around 1.5.0beta36 from pngconf.h */ /* Users may want to use these so they are not private. Any library @@ -553,26 +552,6 @@ typedef const png_uint_16p * png_const_uint_16pp; abs((int)((c1).green) - (int)((c2).green)) + \ abs((int)((c1).blue) - (int)((c2).blue))) -/* Added to libpng-1.5.7: sRGB conversion tables */ -#if defined PNG_SIMPLIFIED_READ_SUPPORTED ||\ - defined PNG_SIMPLIFIED_WRITE_SUPPORTED -#ifdef PNG_SIMPLIFIED_READ_SUPPORTED -PNG_INTERNAL_DATA(const png_uint_16, png_sRGB_table, [256]); - /* Convert from an sRGB encoded value 0..255 to a 16-bit linear value, - * 0..65535. This table gives the closest 16-bit answers (no errors). - */ -#endif - -PNG_INTERNAL_DATA(const png_uint_16, png_sRGB_base, [512]); -PNG_INTERNAL_DATA(const png_byte, png_sRGB_delta, [512]); - -#define PNG_sRGB_FROM_LINEAR(linear) ((png_byte)((png_sRGB_base[(linear)>>15] +\ - ((((linear)&0x7fff)*png_sRGB_delta[(linear)>>15])>>12)) >> 8)) - /* Given a value 'linear' in the range 0..255*65535 calculate the 8-bit sRGB - * encoded value with maximum error 0.646365. Note that the input is not a - * 16-bit value; it has been multiplied by 255! */ -#endif /* PNG_SIMPLIFIED_READ/WRITE */ - /* Added to libpng-1.6.0: scale a 16-bit value in the range 0..65535 to 0..255 * by dividing by 257 *with rounding*. This macro is exact for the given range. * See the discourse in pngrtran.c png_do_scale_16_to_8. The values in the @@ -707,6 +686,39 @@ PNG_INTERNAL_DATA(const png_byte, png_sRGB_delta, [512]); #define PNG_GAMMA_MAC_INVERSE 65909 #define PNG_GAMMA_sRGB_INVERSE 45455 +/* Almost everything below is C specific; the #defines above can be used in + * non-C code (so long as it is C-preprocessed) the rest of this stuff cannot. + */ +#ifndef PNG_VERSION_INFO_ONLY + +#include "pngstruct.h" +#include "pnginfo.h" + +/* This is used for 16 bit gamma tables -- only the top level pointers are + * const; this could be changed: + */ +typedef const png_uint_16p * png_const_uint_16pp; + +/* Added to libpng-1.5.7: sRGB conversion tables */ +#if defined PNG_SIMPLIFIED_READ_SUPPORTED ||\ + defined PNG_SIMPLIFIED_WRITE_SUPPORTED +#ifdef PNG_SIMPLIFIED_READ_SUPPORTED +PNG_INTERNAL_DATA(const png_uint_16, png_sRGB_table, [256]); + /* Convert from an sRGB encoded value 0..255 to a 16-bit linear value, + * 0..65535. This table gives the closest 16-bit answers (no errors). + */ +#endif + +PNG_INTERNAL_DATA(const png_uint_16, png_sRGB_base, [512]); +PNG_INTERNAL_DATA(const png_byte, png_sRGB_delta, [512]); + +#define PNG_sRGB_FROM_LINEAR(linear) ((png_byte)((png_sRGB_base[(linear)>>15] +\ + ((((linear)&0x7fff)*png_sRGB_delta[(linear)>>15])>>12)) >> 8)) + /* Given a value 'linear' in the range 0..255*65535 calculate the 8-bit sRGB + * encoded value with maximum error 0.646365. Note that the input is not a + * 16-bit value; it has been multiplied by 255! */ +#endif /* PNG_SIMPLIFIED_READ/WRITE */ + /* Inhibit C++ name-mangling for libpng functions but not for system calls. */ #ifdef __cplusplus @@ -1896,4 +1908,5 @@ PNG_INTERNAL_FUNCTION(void, PNG_FILTER_OPTIMIZATIONS, (png_structp png_ptr, unsi } #endif +#endif /* PNG_VERSION_INFO_ONLY */ #endif /* PNGPRIV_H */ |