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| Libpng 1.5.0 - January 6, 2011 |
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| This is a public release of libpng, intended for use in production codes. |
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| Files available for download: |
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| Source files with LF line endings (for Unix/Linux) and with a |
| "configure" script |
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| libpng-1.5.0.tar.xz (LZMA-compressed, recommended) |
| libpng-1.5.0.tar.gz |
| libpng-1.5.0.tar.bz2 |
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| Source files with CRLF line endings (for Windows), without the |
| "configure" script |
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| lpng150.7z (LZMA-compressed, recommended) |
| lpng150.zip |
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| Other information: |
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| libpng-1.5.0-README.txt |
| libpng-1.5.0-LICENSE.txt |
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| Changes since the last public release (1.4.1): |
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| version 1.5.0 [January 6, 2011] |
| |
| Moved declaration of png_struct into private pngstruct.h and png_info |
| into pnginfo.h |
| Updated configure script to use SO number 15. |
| Removed PNG_DEPSTRUCT markup in pngstruct.h and pnginfo.h, and undid the |
| linewrapping that it entailed. |
| Revised comments in pngstruct.h and pnginfo.h and added pointers to |
| the libpng license. |
| Removed the cbuilder5 project, which has not been updated to 1.4.0. |
| Changed #ifdef PNG_NO_STDIO_SUPPORTED to #ifdef PNG_NO_CONSOLE_IO_SUPPORTED |
| wherever png_snprintf() is used to construct error and warning messages. |
| Removed obsolete unused MMX-querying support from contrib/gregbook |
| Noted in scripts/makefile.mingw that it expects to be run under MSYS. |
| Added exported png_longjmp() function. |
| Removed the AIX redefinition of jmpbuf in png.h |
| Changed the name of png_ptr->jmpbuf to png_ptr->png_jmpbuf in pngstruct.h |
| Removed unused gzio.c from contrib/pngminim gather and makefile scripts |
| Removed checking for already-included setjmp.h from pngconf.h |
| Fixed inconsistent indentations and made numerous cosmetic changes. |
| Revised the "SEE ALSO" style of libpng.3, libpngpf.3, and png.5 |
| Moved "#include png.h" inside pngpriv.h and removed "#include png.h" from |
| the source files, along with "#define PNG_EXPOSE_INTERNAL_STRUCTURES" |
| and "#define PNG_NO_PEDANTIC_WARNINGS" (John Bowler). |
| Created new pngdebug.h and moved debug definitions there. |
| Protect pngstruct.h, pnginfo.h, and pngdebug.h from being included twice. |
| Moved the 'config.h' support from pngconf.h to pngpriv.h |
| Removed PNGAPI from the png_longjmp_ptr typedef. |
| Eliminated dependence of pngtest.c on the private pngdebug.h file. |
| Make all png_debug macros into *unterminated* statements or |
| expressions (i.e. a trailing ';' must always be added) and correct |
| the format statements in various png_debug messages. |
| Removed direct access to png_ptr->io_ptr from the Windows code in pngtest.c |
| Corrected CE and OS/2 DEF files (scripts/png*def) for symbols removed and |
| added ordinal numbers to the Windows DEF file and corrected the duplicated |
| ordinal numbers on CE symbols that are commented out. |
| PNG_EXPORT changed to include an 'ordinal' field for DEF file generation. |
| PNG_CALLBACK added to make callback definitions uniform. PNGAPI split |
| into PNGCAPI (base C form), PNGAPI (exports) and PNGCBAPI (callbacks), |
| and appropriate changes made to all files. Cygwin builds re-hinged to |
| allow procedure call standard changes and to remove the need for the DEF |
| file (fixes build on Cygwin). |
| Enabled 'attribute' warnings that are relevant to library APIs and callbacks. |
| Changed rules for generation of the various symbol files and added a new |
| rule for a DEF file (which is also added to the distribution). |
| Updated the symbol file generation to stop it adding spurious spaces |
| to EOL (coming from preprocessor macro expansion). Added a facility |
| to join tokens in the output and rewrite *.dfn to use this. |
| Eliminated scripts/*.def in favor of libpng.def; updated projects/visualc71 |
| and removed scripts/makefile.cygwin and makefile.mingw. |
| Made PNG_BUILD_DLL safe: it can be set whenever a DLL is being built. |
| Removed the include of sys/types.h - apparently unnecessary now on the |
| platforms on which it happened (all but Mac OS and RISC OS). |
| Moved the Mac OS test into pngpriv.h (the only place it is used.) |
| Added symbols.chk target to Makefile.am to validate the symbols in png.h |
| against the new DEF file scripts/symbols.def. |
| Eliminated PNG_NO_EXTERN and PNG_ALL_EXTERN |
| Make png_text_struct independent of PNG_iTXt_SUPPORTED, so that |
| fields are initialized in all configurations. The READ/WRITE |
| macros (PNG_(READ|WRITE)_iTXt_SUPPORTED) still function as |
| before to disable code to actually read or write iTXt chunks |
| and iTXt_SUPPORTED can be used to detect presence of either |
| read or write support (but it is probably better to check for |
| the one actually required - read or write.) |
| Combined multiple png_warning() calls for a single error. |
| Restored the macro definition of png_check_sig(). |
| Added some "(long)" typecasts to printf calls in png_handle_cHRM(). |
| Documented the fact that png_set_dither() was disabled since libpng-1.4.0. |
| Reenabled png_set_dither() but renamed it to png_set_quantize() to reflect |
| more accurately what it actually does. At the same time, renamed |
| the PNG_DITHER_[RED,GREEN_BLUE]_BITS macros to |
| PNG_QUANTIZE_[RED,GREEN,BLUE]_BITS. |
| Freeze build-time only configuration in the build. |
| In all prior versions of libpng most configuration options |
| controlled by compiler #defines had to be repeated by the |
| application code that used libpng. This patch changes this |
| so that compilation options that can only be changed at build |
| time are frozen in the build. Options that are compiler |
| dependent (and those that are system dependent) are evaluated |
| each time - pngconf.h holds these. Options that can be changed |
| per-file in the application are in png.h. Frozen options are |
| in the new installed header file pnglibconf.h (John Bowler) |
| Removed the xcode project because it has not been updated to work |
| with libpng-1.5.0. |
| Moved replacements for png_error() and png_warning() from the |
| contrib/pngminim project to pngerror.c, for use when warnings or |
| errors are disabled via PNG_NO_WARN or PNG_NO_ERROR_TEXT, to avoid |
| storing unneeded error/warning text. |
| Updated contrib/pngminim project to work with the new pnglibconf.h |
| Added some PNG_NO_* defines to contrib/pngminim/*/pngusr.h to save space. |
| Added PNG_{READ,WRITE}_INT_FUNCTIONS_SUPPORTED. This allows the functions |
| to read and write ints to be disabled independently of PNG_USE_READ_MACROS, |
| which allows libpng to be built with the functions even though the default |
| is to use the macros - this allows applications to choose at app build |
| time whether or not to use macros (previously impossible because the |
| functions weren't in the default build.) |
| Changed Windows calling convention back to __cdecl for API functions. |
| For Windows/x86 platforms only: |
| __stdcall is no longer needed for Visual Basic, so libpng-1.5.0 uses |
| __cdecl throughout (both API functions and callbacks) on Windows/x86 |
| platforms. |
| Replaced the visualc6 project with new vstudio project. |
| Relaxed the overly-restrictive permissions of some files. |
| Set PNG_NO_READ_BGR, PNG_NO_IO_STATE, and PNG_NO_TIME_RFC1123 in |
| contrib/pngminim/decoder/pngusr.h to make a smaller decoder application. |
| Fixed dependencies of GET_INT_32 - it does not require READ_INT_FUNCTIONS |
| because it has a macro equivalent. |
| Improved the options.awk script; added an "everything off" option. |
| Revised contrib/pngminim to use the "everything off" option in pngusr.dfa. |
| Corrected PNG_REMOVED macro to take five arguments. |
| Corrected PNG_UNKNOWN_CHUNKS_SUPPORTED to PNG_HANDLE_AS_UNKNOWN_SUPPORTED |
| in gregbook/readpng2.c |
| Corrected protection of png_get_user_transform_ptr. The API declaration in |
| png.h is removed if both READ and WRITE USER_TRANSFORM are turned off |
| but was left defined in pngtrans.c |
| Added logunsupported=1 to cause pnglibconf.h to document disabled options. |
| This makes the installed pnglibconf.h more readable but causes no |
| other change. The intention is that users of libpng will find it |
| easier to understand if an API they need is missing. |
| Include png_reset_zstream() in png.c only when PNG_READ_SUPPORTED is defined. |
| Removed dummy_inflate.c from contrib/pngminim/encoder |
| Removed contrib/pngminim/*/gather.sh; gathering is now done in the makefile. |
| Use bitwise "&" instead of arithmetic mod in pngrutil.c calculation of the |
| offset of the png_ptr->rowbuf pointer into png_ptr->big_row_buf. |
| Added more blank lines for readability. |
| In pngpread.c: png_push_process_row() add check for too many rows. |
| Rewrote png_process_IDAT_data to consistently treat extra data as warnings |
| and handle end conditions more cleanly. |
| Removed the now-redundant check for out-of-bounds new_row from example.c |
| Revised scripts/options.awk to work on Sunos (but still doesn't work) |
| Added comment to options.awk and contrib/pngminim/*/makefile to try nawk. |
| Stop memory leak when reading a malformed sCAL chunk. |
| Made FIXED and FLOATING options consistent in the APIs they enable and |
| disable. Corrected scripts/options.awk to handle both command line |
| options and options specified in the .dfa files. |
| Changed char *msg to PNG_CONST char *msg in pngrutil.c |
| Make png_set_sRGB_gAMA_and_cHRM set values using either the fixed or |
| floating point APIs, but not both. |
| Changed "extern PNG_EXPORT" to "PNG_EXPORT" in png.h (Jan Nijtmans) |
| Changed "extern" to "PNG_EXTERN" in pngpriv.h (except for the 'extern "C" {') |
| Put #ifndef PNG_EXTERN, #endif around the define PNG_EXTERN in pngpriv.h |
| Added -DNO_PNG_SNPRINTF to CFLAGS in scripts/makefile.dj2 |
| Moved the definition of png_snprintf() outside of the enclosing |
| #ifdef blocks in pngconf.h |
| Patches by John Bowler: |
| Fixed point APIs are now supported throughout (no missing APIs). |
| Internal fixed point arithmetic support exists for all internal floating |
| point operations. |
| sCAL validates the floating point strings it is passed. |
| Safe, albeit rudimentary, Watcom support is provided by PNG_API_RULE==2 |
| Two new APIs exist to get the number of passes without turning on the |
| PNG_INTERLACE transform and to get the number of rows in the current |
| pass. |
| A new test program, pngvalid.c, validates the gamma code. |
| Errors in the 16 bit gamma correction (overflows) have been corrected. |
| cHRM chunk testing is done consistently (previously the floating point |
| API bypassed it, because the test really didn't work on FP, now the test |
| is performed on the actual values to be stored in the PNG file so it |
| works in the FP case too.) |
| Most floating point APIs now simply call the fixed point APIs after |
| converting the values to the fixed point form used in the PNG file. |
| The standard headers no longer include zlib.h, which is currently only |
| required for pngstruct.h and can therefore be internal. |
| Revised png_get_int_32 to undo the PNG two's complement representation of |
| negative numbers. |
| Added a typecast in png_get_int_32() in png.h and pngrutil.h to avoid |
| a compiler warning. |
| Replaced oFFs 0,0 with oFFs -10,20 in pngtest.png |
| VisualC/GCC warning fixes, VisualC build fixes |
| The changes include support for function attributes in VC in addition to |
| those already present in GCC - necessary because without these some |
| warnings are unavoidable. Fixes include signed/unsigned fixes in |
| pngvalid and checks with gcc -Wall -Wextra -Wunused. |
| VC requires function attributes on function definitions as well as |
| declarations, PNG_FUNCTION has been added to enable this and the |
| relevant function definitions changed. |
| Added the sRGB and cHRM chunks to pngtest.png |
| Don't try to use version-script with cygwin/mingw. |
| Revised contrib/gregbook to work under cygwin/mingw. |
| Made all API functions that have const arguments and constant string |
| literal pointers declare them (John Bowler). |
| Removed spurious tabs, shorten long lines (no source change) |
| Also added scripts/chkfmt to validate the format of all the files that can |
| reasonably be validated (it is suggested to run "make distclean" before |
| checking, because some machine generated files have long lines.) |
| Reformatted the CHANGES file to be more consistent throughout. |
| Made changes to address various issues identified by GCC, mostly |
| signed/unsigned and shortening problems on assignment but also a few |
| difficult to optimize (for GCC) loops. |
| Use cexcept.h in pngvalid.c. |
| Updated CMakeLists.txt to use CMAKE_INSTALL_LIBDIR variable; useful for |
| installing libpng in /usr/lib64 (Funda Wang). |
| Revised CMakeLists.txt to put the man pages in share/man/man* not man/man* |
| Revised CMakeLists.txt to make symlinks instead of copies when installing. |
| Changed PNG_LIB_NAME from pngNN to libpngNN in CMakeLists.txt (Philip Lowman) |
| Implemented memory checks within pngvalid |
| Reformatted/rearranged pngvalid.c to assist use of progressive reader. |
| Check interlaced images in pngvalid |
| Clarified pngusr.h comments in pnglibconf.dfa |
| Simplified the pngvalid error-handling code now that cexcept.h is in place. |
| Implemented progressive reader in pngvalid.c for standard tests |
| Implemented progressive read in pngvalid.c gamma tests |
| Turn on progressive reader in pngvalid.c by default and tidy code. |
| Added an explicit make step to projects/vstudio for pnglibconf.h |
| Also corrected zlib.vcxproj into which Visual Studio had introduced |
| what it calls an "authoring error". The change to make pnglibconf.h |
| simply copies the file; in the future it may actually generate the |
| file from scripts/pnglibconf.dfa as the other build systems do. |
| Changed pngvalid to work when floating point APIs are disabled |
| Renamed the prebuilt scripts/pnglibconf.h to scripts/pnglibconf.h.prebuilt |
| Supply default values for PNG_USER_PRIVATEBUILD and PNG_USER_DLLFNAME_POSTFIX |
| in pngpriv.h in case the user neglected to define them in their pngusr.h |
| Added new private header files to libpng_sources in CMakeLists.txt |
| Added PNG_READ_16BIT, PNG_WRITE_16BIT, and PNG_16BIT options. |
| Added reference to scripts/pnglibconf.h.prebuilt in the visualc71 project. |
| Fixed a number of problems with 64-bit compilation reported by Visual |
| Studio 2010 (John Bowler). |
| Revised autogen.sh to recognize and use $AUTOCONF, $AUTOMAKE, $AUTOHEADER, |
| $AUTOPOINT, $ACLOCAL and $LIBTOOLIZE |
| Removed unused mkinstalldirs and revised Makefile.in accorgingly. |
| Added some "(unsigned long)" typecasts in printf statements in pngvalid.c. |
| Suppressed a compiler warning in png_handle_sPLT(). |
| Check for out-of-range text compression mode in png_set_text(). |
| Changed many embedded dates to "(PENDING RELEASE) in beta releases (and |
| future rc releases) to minimize the difference between releases. |
| Updated INSTALL to mention using "make maintainer-clean" and to remove |
| obsolete statement about a custom ltmain.sh |
| Disabled "color-tests" by default in Makefile.am so it will work with |
| automake versions earlier than 1.11.1 |
| Use document name "libpng-manual.txt" instead of "libpng-<version>.txt" |
| to simplify version differences. |
| Removed obsolete remarks about setjmp handling from INSTALL. |
| Revised and renamed the typedef in png.h and png.c that was designed |
| to catch library and header mismatch. |
| Require 48 bytes, not 64 bytes, for big_row_buf in overflow checks. |
| Used a consistent structure for the pngget.c functions. |
| Revised png_get_uint_32, png_get_int_32, png_get_uint_16 (Cosmin) |
| Moved reading of file signature into png_read_sig (Cosmin) |
| Fixed atomicity of chunk header serialization (Cosmin) |
| Added test for io_state in pngtest.c (Cosmin) |
| Added "#!/bin/sh" at the top of contrib/pngminim/*/gather.sh scripts. |
| Changes to remove gcc warnings (John Bowler) |
| Certain optional gcc warning flags resulted in warnings in libpng code. |
| With these changes only -Wconversion and -Wcast-qual cannot be turned on. |
| Changes are trivial rearrangements of code. -Wconversion is not possible |
| for pngrutil.c (because of the widespread use of += et al on variables |
| smaller than (int) or (unsigned int)) and -Wcast-qual is not possible |
| with pngwio.c and pngwutil.c because the 'write' callback and zlib |
| compression both fail to declare their input buffers with 'const'. |
| Added the private PNG_UNUSED() macro definition in pngpriv.h. |
| Added some commentary about PNG_EXPORT in png.h and pngconf.h |
| Revised PNG_EXPORT() macro and added PNG_EXPORTA() macro, with the |
| objective of simplifying and improving the cosmetic appearance of png.h. |
| Fixed some incorrect "=" macro names in pnglibconf.dfa |
| Included documentation of changes in 1.5.0 from 1.4.x in libpng-manual.txt |
| Documented the pngvalid gamma error summary with additional comments and |
| print statements. |
| Improved missing symbol handling in checksym.awk; symbols missing in both |
| the old and new files can now be optionally ignored, treated as errors |
| or warnings. |
| Removed references to pngvcrd.c and pnggccrd.c from the vstudio project. |
| Updated "libpng14" to "libpng15" in the visualc71 project. |
| Enabled the strip16 tests in pngvalid. |
| Don't display test results (except PASS/FAIL) when running "make test". |
| Instead put them in pngtest-log.txt |
| Updated the prebuilt configuration files to autoconf version 2.68 |
| Fixed interlace image handling and add test cases (John Bowler) |
| Fixed the clean rule in Makefile.am to remove pngtest-log.txt |
| Made minor changes to work around warnings in gcc 3.4 |
| Eliminated references to the scripts/*.def files in project/visualc71. |
| Eliminated scripts/*.def and revised Makefile.am accordingly |
| Fixed bug in background transformation handling in pngrtran.c (it was |
| looking for the flag in png_ptr->transformations instead of in |
| png_ptr->flags) (David Raymond). |
| Fixed typo in a comment in CMakeLists.txt (libpng14 => libpng15) (Cosmin) |
| Added "--with-zlib-prefix=<string>" to configure.ac |
| |
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| |
| Glenn R-P |
