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01ff090760
PNG compression level setting API: this allows the various compression settings
controlling deflate, fitlering, and so on to be set via a single setting with
six values. This is currently documented in png.h ("Write compression
settings").
Internally the compression settings have been tuned both for the overall setting
and for any specific settings made by the original APIs.
APIs to control iCCP chunk compression separately have been added.
contrib/examples/pngcp.c has been modified to accomodate the new compression
setting and to include options for separate control of iCCP chunk compression.
The new ABI, png_setting, has been modified to accomodate a wider range of
settings and most of the old compression control ABIs have been replaced by
function-like macros with the same API which call png_setting. This is an API
check in 1.7.0 for png_setting (alone). png_setting now handles all of
png_set_option. This eliminates 19 ABIs at the cost of adding 1 (png_setting).
CRC and benign error checking has been updated internally to use bit-fields and
the CRC calculation skip when the CRC is not used has been improved slightly to
avoid the initialization of the CRC. A new png_setting based API allows more
detailed control of benign error/warning messages (this may change, the internal
error handling seems too complex.) The ERROR_NUMBERS support has been removed
with the intent of implementing proper i18n.
The memcpy-size-0 issue in png_push_fill_buffer has been fixed, with an
appropriate debug() assert if a fill for 0 bytes occurs.
Most PNG_FLAG_ values for png_struct::flags have been eliminated (as a result of
the benign error handling changes). Only one remains.
Signed-off-by: John Bowler <jbowler@acm.org>
Makefiles for libpng version 1.7.0beta81 - May 21, 2016
pnglibconf.h.prebuilt => Stores configuration settings
makefile.linux => Linux/ELF makefile
(gcc, creates libpng17.so.17.1.7.0beta81)
makefile.gcc => Generic makefile (gcc, creates static libpng.a)
makefile.knr => Archaic UNIX Makefile that converts files with
ansi2knr (Requires ansi2knr.c from
ftp://ftp.cs.wisc.edu/ghost)
makefile.acorn => Acorn makefile
makefile.aix => AIX/gcc makefile
makefile.amiga => Amiga makefile
makefile.atari => Atari makefile
makefile.bc32 => 32-bit Borland C++ (all modules compiled in C mode)
makefile.beos => beos makefile
makefile.bor => Borland makefile (uses bcc)
makefile.cegcc => minge32ce for Windows CE makefile
makefile.darwin => Darwin makefile, can use on MacosX
makefile.dec => DEC Alpha UNIX makefile
makefile.dj2 => DJGPP 2 makefile
makefile.freebsd => FreeBSD makefile
makefile.gcc => Generic gcc makefile
makefile.hpgcc => HPUX makefile using gcc
makefile.hpux => HPUX (10.20 and 11.00) makefile
makefile.hp64 => HPUX (10.20 and 11.00) makefile, 64-bit
makefile.ibmc => IBM C/C++ version 3.x for Win32 and OS/2 (static)
makefile.intel => Intel C/C++ version 4.0 and later
makefile.mips => MIPS makefile
makefile.msc => Microsoft C makefile
makefile.netbsd => NetBSD/cc makefile, makes libpng.so.
makefile.openbsd => OpenBSD makefile
makefile.os2 => OS/2 Makefile (gcc and emx, requires libpng.def)
makefile.sco => For SCO OSr5 ELF and Unixware 7 with Native cc
makefile.sggcc => Silicon Graphics (gcc,
creates libpng17.so.17.1.7.0beta81)
makefile.sgi => Silicon Graphics IRIX makefile (cc, creates static lib)
makefile.solaris => Solaris 2.X makefile (gcc,
creates libpng17.so.17.1.7.0beta81)
makefile.so9 => Solaris 9 makefile (gcc,
creates libpng17.so.17.1.7.0beta81)
makefile.std => Generic UNIX makefile (cc, creates static libpng.a)
makefile.sunos => Sun makefile
makefile.32sunu => Sun Ultra 32-bit makefile
makefile.64sunu => Sun Ultra 64-bit makefile
makefile.tc3 => Turbo C 3.0 makefile
makefile.vcwin32 => makefile for Microsoft Visual C++ 4.0 and later
makevms.com => VMS build script
smakefile.ppc => AMIGA smakefile for SAS C V6.58/7.00 PPC compiler
(Requires SCOPTIONS, copied from scripts/SCOPTIONS.ppc)
Other supporting scripts:
README.txt => This file
descrip.mms => VMS makefile for MMS or MMK
libpng-config-body.in => used by several makefiles to create libpng-config
libpng-config-head.in => used by several makefiles to create libpng-config
libpng.pc.in => Used by several makefiles to create libpng.pc
pngwin.rc => Used by the visualc71 project.
pngwin.def => Used by makefile.os2
pngwin.dfn => Used to maintain pngwin.def
SCOPTIONS.ppc => Used with smakefile.ppc
checksym.awk => Used for maintaining pnglibconf.h
def.dfn => Used for maintaining pnglibconf.h
options.awk => Used for maintaining pnglibconf.h
pnglibconf.dfa => Used for maintaining pnglibconf.h
pnglibconf.mak => Used for maintaining pnglibconf.h
sym.dfn => Used for symbol versioning
symbols.def => Used for symbol versioning
symbols.dfn => Used for symbol versioning
vers.dfn => Used for symbol versioning
libtool.m4 => Used by autoconf tools
ltoptions.m4 => Used by autoconf tools
ltsugar.m4 => Used by autoconf tools
ltversion.m4 => Used by autoconf tools
lt~obsolete.m4 => Used by autoconf tools
intprefix.dfn => Used by autoconf tools
macro.lst => Used by autoconf tools
prefix.dfn => Used by autoconf tools
Further information can be found in comments in the individual makefiles.