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Libpng 1.5.0beta23 - April 29, 2010
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.
Files available for download:
Source files with LF line endings (for Unix/Linux) and with a
"configure" script
1.5.0beta23.tar.xz (LZMA-compressed, recommended)
1.5.0beta23.tar.gz
1.5.0beta23.tar.bz2
Source files with CRLF line endings (for Windows), without the
"configure" script
lp150b23.zip
lp150b23.7z
Other information:
1.5.0beta23-README.txt
1.5.0beta23-LICENSE.txt
Changes since the last public release (1.4.1):
version 1.5.0beta01 [February 7, 2010]
Moved declaration of png_struct into private pngstruct.h and png_info
into pnginfo.h
version 1.5.0beta02 [February 7, 2010]
Reverted to original png_push_save_buffer() code.
version 1.5.0beta03 [February 8, 2010]
Return allocated "old_buffer" in png_push_save_buffer() before
calling png_error().
Updated configure script to use SO number 15.
version 1.5.0beta04 [February 9, 2010]
Removed malformed "incomplete struct declaration" of png_info from png.h
version 1.5.0beta05 [February 12, 2010]
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.
Changed PNG_INTERNAL to PNG_EXPOSE_INTERNAL_STRUCTURES
Removed the cbuilder5 project, which has not been updated to 1.4.0.
version 1.4.1beta12 and 1.5.0beta06 [February 14, 2010]
Fixed type declaration of png_get_chunk_malloc_max() in pngget.c (Daisuke
Nishikawa)
version 1.5.0beta07 [omitted]
version 1.5.0beta08 [February 19, 2010]
Changed #ifdef PNG_NO_STDIO_SUPPORTED to #ifdef PNG_NO_CONSOLE_IO_SUPPORTED
wherever png_snprintf() is used to construct error and warning messages.
Noted in scripts/makefile.mingw that it expects to be run under MSYS.
Removed obsolete unused MMX-querying support from contrib/gregbook
Added exported png_longjmp() function.
Removed the AIX redefinition of jmpbuf in png.h
Added -D_ALLSOURCE in configure.ac, makefile.aix, and CMakeLists.txt
when building on AIX.
version 1.5.0beta09 [February 19, 2010]
Removed -D_ALLSOURCE from configure.ac, makefile.aix, and CMakeLists.txt.
Changed the name of png_ptr->jmpbuf to png_ptr->png_jmpbuf in pngstruct.h
version 1.5.0beta10 [February 25, 2010]
Removed unused gzio.c from contrib/pngminim gather and makefile scripts
Removed replacement error handlers from contrib/gregbook. Because of
the new png_longjmp() function they are no longer needed.
version 1.5.0beta11 [March 6, 2010]
Removed checking for already-included setjmp.h from pngconf.h
Fixed inconsistent indentations and made numerous cosmetic changes.
version 1.5.0beta12 [March 9, 2010]
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.
version 1.5.0beta13 [March 10, 2010]
Protect pngstruct.h, pnginfo.h, and pngdebug.h from being included twice.
Revise the "#ifdef" blocks in png_inflate() so it will compile when neither
PNG_USER_CHUNK_MALLOC_MAX nor PNG_SET_CHUNK_MALLOC_LIMIT_SUPPORTED
is defined.
Removed unused png_measure_compressed_chunk() from pngpriv.h and libpngpf.3
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.
version 1.5.0beta14 [March 14, 2010]
Removed direct access to png_ptr->io_ptr from the Windows code in pngtest.c
Revised Makefile.am to account for recent additions and replacements.
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.
Added back in export symbols that can be present in the Windows build but
are disabled by default.
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.
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.)
version 1.5.0beta15 [March 17, 2010]
Added symbols.chk target to Makefile.am to validate the symbols in png.h
against the new DEF file scripts/symbols.def.
Changed the default DEF file back to pngwin.def.
Removed makefile.mingw.
Eliminated PNG_NO_EXTERN and PNG_ALL_EXTERN
version 1.5.0beta16 [April 1, 2010]
Made 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().
version 1.5.0beta17 [April 17, 2010]
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.
Added some "(long)" typecasts to printf calls in png_handle_cHRM().
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.
version 1.5.0beta18 [April 17, 2010]
Restored the ability to include optional pngusr.h
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.
version 1.5.0beta19 [April 24, 2010]
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 visualc6 and visualc71 projects with new vstudio project
Relaxed the overly-restrictive permissions of some files.
version 1.5.0beta20 [April 24, 2010]
Relaxed more overly-restrictive permissions of some files.
version 1.5.0beta21 [April 27, 2010]
Removed some unwanted binary bytes and changed CRLF to NEWLINE in the new
vstudio project files, and some trivial editing of some files in the
scripts directory.
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.
version 1.5.0beta22 [April 28, 2010]
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.
version 1.5.0beta23 [April 29, 2010]
Corrected PNG_REMOVED macro to take five arguments.
The macro was documented with two arguments (name,ordinal), however
the symbol checking .dfn files assumed five arguments. The five
argument form seems more useful so it is changed to that.
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.
Send comments/corrections/commendations to png-mng-implement at lists.sf.net:
(subscription required; visit
https://lists.sourceforge.net/lists/listinfo/png-mng-implement
to subscribe) or to glennrp at users.sourceforge.net
Glenn R-P
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