420 lines
20 KiB
Plaintext
420 lines
20 KiB
Plaintext
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Libpng 1.5.0beta50 - October 8, 2010
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This is not intended to be a public release. It will be replaced
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within a few weeks by a public version or by another test version.
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Files available for download:
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Source files with LF line endings (for Unix/Linux) and with a
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"configure" script
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1.5.0beta50.tar.xz (LZMA-compressed, recommended)
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1.5.0beta50.tar.gz
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1.5.0beta50.tar.bz2
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Source files with CRLF line endings (for Windows), without the
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"configure" script
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lp150b50.zip
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lp150b50.7z
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Other information:
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1.5.0beta50-README.txt
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1.5.0beta50-LICENSE.txt
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Changes since the last public release (1.4.1):
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version 1.5.0beta01 [February 7, 2010]
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Moved declaration of png_struct into private pngstruct.h and png_info
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into pnginfo.h
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version 1.5.0beta02 [February 7, 2010]
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Reverted to original png_push_save_buffer() code.
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version 1.5.0beta03 [February 8, 2010]
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Return allocated "old_buffer" in png_push_save_buffer() before
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calling png_error().
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Updated configure script to use SO number 15.
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version 1.5.0beta04 [February 9, 2010]
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Removed malformed "incomplete struct declaration" of png_info from png.h
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version 1.5.0beta05 [February 12, 2010]
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Removed PNG_DEPSTRUCT markup in pngstruct.h and pnginfo.h, and undid the
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linewrapping that it entailed.
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Revised comments in pngstruct.h and pnginfo.h and added pointers to
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the libpng license.
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Changed PNG_INTERNAL to PNG_EXPOSE_INTERNAL_STRUCTURES
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Removed the cbuilder5 project, which has not been updated to 1.4.0.
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version 1.4.1beta12 and 1.5.0beta06 [February 14, 2010]
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Fixed type declaration of png_get_chunk_malloc_max() in pngget.c (Daisuke
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Nishikawa)
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version 1.5.0beta07 [omitted]
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version 1.5.0beta08 [February 19, 2010]
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Changed #ifdef PNG_NO_STDIO_SUPPORTED to #ifdef PNG_NO_CONSOLE_IO_SUPPORTED
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wherever png_snprintf() is used to construct error and warning messages.
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Noted in scripts/makefile.mingw that it expects to be run under MSYS.
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Removed obsolete unused MMX-querying support from contrib/gregbook
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Added exported png_longjmp() function.
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Removed the AIX redefinition of jmpbuf in png.h
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Added -D_ALLSOURCE in configure.ac, makefile.aix, and CMakeLists.txt
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when building on AIX.
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version 1.5.0beta09 [February 19, 2010]
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Removed -D_ALLSOURCE from configure.ac, makefile.aix, and CMakeLists.txt.
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Changed the name of png_ptr->jmpbuf to png_ptr->png_jmpbuf in pngstruct.h
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version 1.5.0beta10 [February 25, 2010]
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Removed unused gzio.c from contrib/pngminim gather and makefile scripts
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Removed replacement error handlers from contrib/gregbook. Because of
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the new png_longjmp() function they are no longer needed.
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version 1.5.0beta11 [March 6, 2010]
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Removed checking for already-included setjmp.h from pngconf.h
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Fixed inconsistent indentations and made numerous cosmetic changes.
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Revised the "SEE ALSO" style of libpng.3, libpngpf.3, and png.5
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version 1.5.0beta12 [March 9, 2010]
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Moved "#include png.h" inside pngpriv.h and removed "#include png.h" from
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the source files, along with "#define PNG_EXPOSE_INTERNAL_STRUCTURES"
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and "#define PNG_NO_PEDANTIC_WARNINGS" (John Bowler).
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Created new pngdebug.h and moved debug definitions there.
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version 1.5.0beta13 [March 10, 2010]
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Protect pngstruct.h, pnginfo.h, and pngdebug.h from being included twice.
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Revise the "#ifdef" blocks in png_inflate() so it will compile when neither
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PNG_USER_CHUNK_MALLOC_MAX nor PNG_SET_CHUNK_MALLOC_LIMIT_SUPPORTED
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is defined.
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Removed unused png_measure_compressed_chunk() from pngpriv.h and libpngpf.3
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Moved the 'config.h' support from pngconf.h to pngpriv.h
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Removed PNGAPI from the png_longjmp_ptr typedef.
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Eliminated dependence of pngtest.c on the private pngdebug.h file.
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Make all png_debug macros into *unterminated* statements or
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expressions (i.e. a trailing ';' must always be added) and correct
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the format statements in various png_debug messages.
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version 1.5.0beta14 [March 14, 2010]
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Removed direct access to png_ptr->io_ptr from the Windows code in pngtest.c
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Revised Makefile.am to account for recent additions and replacements.
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Corrected CE and OS/2 DEF files (scripts/png*def) for symbols removed and
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added ordinal numbers to the Windows DEF file and corrected the duplicated
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ordinal numbers on CE symbols that are commented out.
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Added back in export symbols that can be present in the Windows build but
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are disabled by default.
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PNG_EXPORT changed to include an 'ordinal' field for DEF file generation.
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PNG_CALLBACK added to make callback definitions uniform. PNGAPI split
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into PNGCAPI (base C form), PNGAPI (exports) and PNGCBAPI (callbacks),
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and appropriate changes made to all files. Cygwin builds re-hinged to
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allow procedure call standard changes and to remove the need for the DEF
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file (fixes build on Cygwin).
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Enabled 'attribute' warnings that are relevant to library APIs and callbacks.
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Changed rules for generation of the various symbol files and added a new
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rule for a DEF file (which is also added to the distribution).
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Updated the symbol file generation to stop it adding spurious spaces
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to EOL (coming from preprocessor macro expansion). Added a facility
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to join tokens in the output and rewrite *.dfn to use this.
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Eliminated scripts/*.def in favor of libpng.def; updated projects/visualc71
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and removed scripts/makefile.cygwin.
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Made PNG_BUILD_DLL safe: it can be set whenever a DLL is being built.
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Removed the include of sys/types.h - apparently unnecessary now on the
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platforms on which it happened (all but Mac OS and RISC OS).
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Moved the Mac OS test into pngpriv.h (the only place it is used.)
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version 1.5.0beta15 [March 17, 2010]
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Added symbols.chk target to Makefile.am to validate the symbols in png.h
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against the new DEF file scripts/symbols.def.
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Changed the default DEF file back to pngwin.def.
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Removed makefile.mingw.
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Eliminated PNG_NO_EXTERN and PNG_ALL_EXTERN
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version 1.5.0beta16 [April 1, 2010]
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Made png_text_struct independent of PNG_iTXt_SUPPORTED, so that
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fields are initialized in all configurations. The READ/WRITE
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macros (PNG_(READ|WRITE)_iTXt_SUPPORTED) still function as
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before to disable code to actually read or write iTXt chunks
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and iTXt_SUPPORTED can be used to detect presence of either
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read or write support (but it is probably better to check for
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the one actually required - read or write.)
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Combined multiple png_warning() calls for a single error.
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Restored the macro definition of png_check_sig().
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version 1.5.0beta17 [April 17, 2010]
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Documented the fact that png_set_dither() was disabled since libpng-1.4.0.
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Reenabled png_set_dither() but renamed it to png_set_quantize() to reflect
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more accurately what it actually does. At the same time, renamed
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the PNG_DITHER_[RED,GREEN_BLUE]_BITS macros to
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PNG_QUANTIZE_[RED,GREEN,BLUE]_BITS.
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Added some "(long)" typecasts to printf calls in png_handle_cHRM().
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Freeze build-time only configuration in the build.
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In all prior versions of libpng most configuration options
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controlled by compiler #defines had to be repeated by the
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application code that used libpng. This patch changes this
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so that compilation options that can only be changed at build
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time are frozen in the build. Options that are compiler
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dependent (and those that are system dependent) are evaluated
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each time - pngconf.h holds these. Options that can be changed
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per-file in the application are in png.h. Frozen options are
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in the new installed header file pnglibconf.h (John Bowler)
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Removed the xcode project because it has not been updated to work
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with libpng-1.5.0.
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version 1.5.0beta18 [April 17, 2010]
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Restored the ability to include optional pngusr.h
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Moved replacements for png_error() and png_warning() from the
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contrib/pngminim project to pngerror.c, for use when warnings or
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errors are disabled via PNG_NO_WARN or PNG_NO_ERROR_TEXT, to avoid
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storing unneeded error/warning text.
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Updated contrib/pngminim project to work with the new pnglibconf.h
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Added some PNG_NO_* defines to contrib/pngminim/*/pngusr.h to save space.
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version 1.5.0beta19 [April 24, 2010]
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Added PNG_{READ,WRITE}_INT_FUNCTIONS_SUPPORTED. This allows the functions
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to read and write ints to be disabled independently of PNG_USE_READ_MACROS,
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which allows libpng to be built with the functions even though the default
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is to use the macros - this allows applications to choose at app build
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time whether or not to use macros (previously impossible because the
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functions weren't in the default build.)
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Changed Windows calling convention back to __cdecl for API functions.
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For Windows/x86 platforms only:
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__stdcall is no longer needed for Visual Basic, so libpng-1.5.0 uses
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__cdecl throughout (both API functions and callbacks) on Windows/x86
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platforms.
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Replaced visualc6 and visualc71 projects with new vstudio project
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Relaxed the overly-restrictive permissions of some files.
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version 1.5.0beta20 [April 24, 2010]
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Relaxed more overly-restrictive permissions of some files.
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version 1.5.0beta21 [April 27, 2010]
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Removed some unwanted binary bytes and changed CRLF to NEWLINE in the new
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vstudio project files, and some trivial editing of some files in the
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scripts directory.
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Set PNG_NO_READ_BGR, PNG_NO_IO_STATE, and PNG_NO_TIME_RFC1123 in
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contrib/pngminim/decoder/pngusr.h to make a smaller decoder application.
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version 1.5.0beta22 [April 28, 2010]
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Fixed dependencies of GET_INT_32 - it does not require READ_INT_FUNCTIONS
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because it has a macro equivalent.
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Improved the options.awk script; added an "everything off" option.
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Revised contrib/pngminim to use the "everything off" option in pngusr.dfa.
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version 1.5.0beta23 [April 29, 2010]
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Corrected PNG_REMOVED macro to take five arguments.
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The macro was documented with two arguments (name,ordinal), however
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the symbol checking .dfn files assumed five arguments. The five
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argument form seems more useful so it is changed to that.
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Corrected PNG_UNKNOWN_CHUNKS_SUPPORTED to PNG_HANDLE_AS_UNKNOWN_SUPPORTED
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in gregbook/readpng2.c
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Corrected protection of png_get_user_transform_ptr. The API declaration in
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png.h is removed if both READ and WRITE USER_TRANSFORM are turned off
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but was left defined in pngtrans.c
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Added logunsupported=1 to cause pnglibconf.h to document disabled options.
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This makes the installed pnglibconf.h more readable but causes no
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other change. The intention is that users of libpng will find it
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easier to understand if an API they need is missing.
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Include png_reset_zstream() in png.c only when PNG_READ_SUPPORTED is defined.
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Removed dummy_inflate.c from contrib/pngminim/encoder
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Removed contrib/pngminim/*/gather.sh; gathering is now done in the makefile.
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version 1.5.0beta24 [May 7, 2010]
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Use bitwise "&" instead of arithmetic mod in pngrutil.c calculation of the
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offset of the png_ptr->rowbuf pointer into png_ptr->big_row_buf.
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Added more blank lines for readability.
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version 1.5.0beta25 [October 8, 2010]
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In pngpread.c: png_push_have_row() add check for new_row > height
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Removed the now-redundant check for out-of-bounds new_row from example.c
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version 1.5.0beta26 [June 18, 2010]
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In pngpread.c: png_push_process_row() add check for too many rows.
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version 1.5.0beta27 [June 18, 2010]
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Removed the check added in beta25 as it is now redundant.
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version 1.5.0beta28 [June 19, 2010]
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Rewrote png_process_IDAT_data to consistently treat extra data as warnings
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and handle end conditions more cleanly.
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Removed the new (beta26) check in png_push_process_row().
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version 1.5.0beta29 [June 21, 2010]
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Revised scripts/options.awk to work on Sunos (but still doesn't work)
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Added comment to options.awk and contrib/pngminim/*/makefile to try nawk.
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version 1.5.0beta30 [June 22, 2010]
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Stop memory leak when reading a malformed sCAL chunk.
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version 1.5.0beta31 [June 26, 2010]
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Revised pngpread.c patch of beta28 to avoid an endless loop.
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Removed some trailing blanks.
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version 1.5.0beta32 [June 26, 2010]
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Removed leftover scripts/options.patch and scripts/options.rej
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version 1.5.0beta33 [July 6, 2010]
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Made FIXED and FLOATING options consistent in the APIs they enable and
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disable. Corrected scripts/options.awk to handle both command line
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options and options specified in the .dfa files.
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Changed char *msg to PNG_CONST char *msg in pngrutil.c
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Make png_set_sRGB_gAMA_and_cHRM set values using either the fixed or
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floating point APIs, but not both.
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Reversed patch to remove error handler when the jmp_buf is stored in the
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main program structure, not the png_struct.
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The error handler is needed because the default handler in libpng will
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always use the jmp_buf in the library control structure; this is never
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set. The gregbook code is a useful example because, even though it
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uses setjmp/longjmp, it shows how error handling can be implemented
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using control mechanisms not directly supported by libpng. The
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technique will work correctly with mechanisms such as Microsoft
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Structure Exceptions or C++ exceptions (compiler willing - note that gcc
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does not by default support interworking of C and C++ error handling.)
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Reverted changes to call png_longjmp in contrib/gregbook where it is not
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appropriate. If mainprog->jmpbuf is used by setjmp, then png_longjmp
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cannot be used.
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Changed "extern PNG_EXPORT" to "PNG_EXPORT" in png.h (Jan Nijtmans)
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Changed "extern" to "PNG_EXTERN" in pngpriv.h (except for the 'extern "C" {')
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version 1.5.0beta34 [July 12, 2010]
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Put #ifndef PNG_EXTERN, #endif around the define PNG_EXTERN in pngpriv.h
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version 1.5.0beta35 [July 24, 2010]
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Removed some newly-added TAB characters.
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Added -DNO_PNG_SNPRINTF to CFLAGS in scripts/makefile.dj2
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Moved the definition of png_snprintf() outside of the enclosing
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#ifdef blocks in pngconf.h
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version 1.5.0beta36 [July 29, 2010]
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Patches by John Bowler:
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Fixed point APIs are now supported throughout (no missing APIs).
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Internal fixed point arithmetic support exists for all internal floating
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point operations.
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sCAL validates the floating point strings it is passed.
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Safe, albeit rudimentary, Watcom support is provided by PNG_API_RULE==2
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Two new APIs exist to get the number of passes without turning on the
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PNG_INTERLACE transform and to get the number of rows in the current
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pass.
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A new test program, pngvalid.c, validates the gamma code.
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Errors in the 16 bit gamma correction (overflows) have been corrected.
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cHRM chunk testing is done consistently (previously the floating point
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API bypassed it, because the test really didn't work on FP, now the test
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is performed on the actual values to be stored in the PNG file so it
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works in the FP case too.)
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Most floating point APIs now simply call the fixed point APIs after
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converting the values to the fixed point form used in the PNG file.
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The standard headers no longer include zlib.h, which is currently only
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required for pngstruct.h and can therefore be internal.
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Revised png_get_int_32 to undo the PNG two's complement representation of
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negative numbers.
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version 1.5.0beta37 [July 30, 2010]
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Added a typecast in png_get_int_32() in png.h and pngrutil.h to avoid
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a compiler warning.
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Replaced oFFs 0,0 with oFFs -10,20 in pngtest.png
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version 1.5.0beta38 [July 31, 2010]
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Implemented remaining "_fixed" functions.
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Corrected a number of recently introduced warnings mostly resulting from
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safe but uncast assignments to shorter integers. Also added a zlib
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VStudio release library project because the latest zlib Official Windows
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build does not include such a thing.
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Revised png_get_int_16() to be similar to png_get_int_32().
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Restored projects/visualc71.
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version 1.5.0beta39 [August 2, 2010]
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VisualC/GCC warning fixes, VisualC build fixes
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The changes include support for function attributes in VC in addition to
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those already present in GCC - necessary because without these some
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warnings are unavoidable. Fixes include signed/unsigned fixes in
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pngvalid and checks with gcc -Wall -Wextra -Wunused.
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VC requires function attributes on function definitions as well as
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declarations, PNG_FUNCTION has been added to enable this and the
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relevant function definitions changed.
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version 1.5.0beta40 [August 6, 2010]
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Correct use of _WINDOWS_ in pngconf.h
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Removed png_mem_ #defines; they are no longer used.
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Added the sRGB chunk to pngtest.png
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version 1.5.0beta41 [August 11, 2010]
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Added the cHRM chunk to pngtest.png
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Don't try to use version-script with cygwin/mingw.
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Revised contrib/gregbook to work under cygwin/mingw.
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version 1.5.0beta42 [August 18, 2010]
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Add .dll.a to the list of extensions to be symlinked by Makefile.am (Yaakov)
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Made all API functions that have const arguments and constant string
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literal pointers declare them (John Bowler).
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Version 1.5.0beta43 [August 20, 2010]
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Removed spurious tabs, shorten long lines (no source change)
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Also added scripts/chkfmt to validate the format of all the files that can
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reasonably be validated (it is suggested to run "make distclean" before
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checking, because some machine generated files have long lines.)
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Reformatted the CHANGES file to be more consistent throughout.
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Made changes to address various issues identified by GCC, mostly
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signed/unsigned and shortening problems on assignment but also a few
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difficult to optimize (for GCC) loops.
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Fixed non-GCC fixed point builds. In png.c a declaration was misplaced
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in an earlier update. Fixed to declare the auto variables at the head.
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Use cexcept.h in pngvalid.c.
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Version 1.5.0beta44 [August 24, 2010]
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Updated CMakeLists.txt to use CMAKE_INSTALL_LIBDIR variable; useful for
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installing libpng in /usr/lib64 (Funda Wang).
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Revised CMakeLists.txt to put the man pages in share/man/man* not man/man*
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Revised CMakeLists.txt to make symlinks instead of copies when installing.
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Changed PNG_LIB_NAME from pngNN to libpngNN in CMakeLists.txt (Philip Lowman)
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Implemented memory checks within pngvalid
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Reformatted/rearranged pngvalid.c to assist use of progressive reader.
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Check interlaced images in pngvalid
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Clarified pngusr.h comments in pnglibconf.dfa
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Simplified the pngvalid error-handling code now that cexcept.h is in place.
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Implemented progressive reader in pngvalid.c for standard tests
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Implemented progressive read in pngvalid.c gamma tests
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Turn on progressive reader in pngvalid.c by default and tidy code.
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Version 1.5.0beta45 [August 26, 2010]
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Added an explicit make step to projects/vstudio for pnglibconf.h
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Also corrected zlib.vcxproj into which Visual Studio had introduced
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what it calls an "authoring error". The change to make pnglibconf.h
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simply copies the file; in the future it may actually generate the
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file from scripts/pnglibconf.dfa as the other build systems do.
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Changed pngvalid to work when floating point APIs are disabled
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Renamed the prebuilt scripts/pnglibconf.h to scripts/pnglibconf.h.prebuilt
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Supply default values for PNG_USER_PRIVATEBUILD and PNG_USER_DLLFNAME_POSTFIX
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in pngpriv.h in case the user neglected to define them in their pngusr.h
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Version 1.5.0beta46 [August 28, 2010]
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Added new private header files to libpng_sources in CMakeLists.txt
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Added PNG_READ_16BIT, PNG_WRITE_16BIT, and PNG_16BIT options.
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Added reference to scripts/pnglibconf.h.prebuilt in the visualc71 project.
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Version 1.5.0beta47 [September 11, 2010]
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Fixed a number of problems with 64-bit compilation reported by Visual
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Studio 2010 (John Bowler).
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Version 1.5.0beta48 [October 4, 2010]
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Updated CMakeLists.txt (Philip Lowman).
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Revised autogen.sh to recognize and use $AUTOCONF, $AUTOMAKE, $AUTOHEADER,
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$AUTOPOINT, $ACLOCAL and $LIBTOOLIZE
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Fixed problem with symbols creation in Makefile.am which was assuming that
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all versions of ccp write to standard output by default (Martin Banky). The
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bug was introduced in libpng-1.2.9beta5.
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Version 1.5.0beta49 [October 8, 2010]
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Undid Makefile.am revision of 1.5.0beta48.
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Version 1.5.0beta50 [October 8, 2010]
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Revised Makefile.in to account for mkinstalldirs being removed.
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Send comments/corrections/commendations to png-mng-implement at lists.sf.net:
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(subscription required; visit
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https://lists.sourceforge.net/lists/listinfo/png-mng-implement
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to subscribe) or to glennrp at users.sourceforge.net
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Glenn R-P
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