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https://git.code.sf.net/p/libpng/code.git
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[alpha] Imported from libpng-1.6.0alpha01.tar
This commit is contained in:
Glenn Randers-Pehrson
@@ -1,9 +1,10 @@
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This demonstrates the use of PNG_USER_CONFIG and pngusr.h
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This demonstrates the use of PNG_USER_CONFIG, pngusr.h and pngusr.dfa
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To build a minimal read-only decoder with embedded libpng and zlib, run
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The makefile builds a minimal read-only decoder with embedded libpng
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and zlib.
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gather.sh # to collect needed files from pngminus, libpng, and zlib
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make
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Specify the location of the zlib source (1.2.1 or later) as ZLIBSRC
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on the make command line.
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If you prefer to use the shared libraries, go to contrib/pngminus
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and build the png2pnm application there.
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and build the png2pnm application there.
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@@ -1,8 +0,0 @@
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cp ../../pngminus/png2pnm.c pngm2pnm.c
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cp ../../../*.h .
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cp ../../../*.c .
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rm example.c pngtest.c pngpread.c pngw*.c
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# change the following 2 lines if zlib is somewhere else
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cp ../../../../zlib/*.h .
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cp ../../../../zlib/*.c .
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rm minigzip.c example.c compress.c deflate.c
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@@ -5,27 +5,82 @@
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CC=gcc
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LD=$(CC)
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RM=rm -f
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# If awk fails try
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# make AWK=nawk
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CFLAGS=-DPNG_USER_CONFIG -DNO_GZCOMPRESS -DNO_GZIP \
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-DdeflateParams\(a,b,c\)=Z_OK -I. -O1
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# If cpp fails try
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# make CPP=/lib/cpp
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RM=rm -f
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COPY=cp
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CFLAGS=-DPNG_USER_CONFIG -DNO_GZCOMPRESS -DNO_GZIP -I. -O1
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C=.c
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O=.o
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L=.a
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E=
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ZOBJS = adler32$(O) crc32$(O) gzio$(O) \
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infback$(O) inffast$(O) inflate$(O) inftrees$(O) \
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trees$(O) uncompr$(O) zutil$(O)
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# Where to find the source code:
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PNGSRC =../../..
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ZLIBSRC=$(PNGSRC)/../zlib
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PROGSRC=$(PNGSRC)/contrib/pngminus
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OBJS = pngm2pnm$(O) png$(O) pngerror$(O) pngget$(O) pngmem$(O) \
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# Zlib (minimal inflate requirements - crc32 is used by libpng)
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# zutil can be eliminated if you provide your own zcalloc and zcfree
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ZSRCS = adler32$(C) crc32$(C) \
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inffast$(C) inflate$(C) inftrees$(C) \
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zutil$(C)
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# Standard headers
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ZH = zlib.h crc32.h inffast.h inffixed.h \
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inflate.h inftrees.h zutil.h
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# Machine generated headers
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ZCONF = zconf.h
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# Headers callers use
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ZINC = zlib.h $(ZCONF)
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# Headers the Zlib source uses
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ZHDRS = $(ZH) $(ZCONF)
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ZOBJS = adler32$(O) crc32$(O) \
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inffast$(O) inflate$(O) inftrees$(O) \
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zutil$(O)
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# libpng
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PNGSRCS=png$(C) pngerror$(C) pngget$(C) pngmem$(C) \
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pngread$(C) pngrio$(C) pngrtran$(C) pngrutil$(C) \
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pngset$(C) pngtrans$(C)
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# Standard headers
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PNGH =png.h pngconf.h pngdebug.h pnginfo.h pngpriv.h pngstruct.h
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# Machine generated headers
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PNGCONF=pnglibconf.h
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# Headers callers use
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PNGINC= png.h pngconf.h pngusr.h $(PNGCONF)
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# Headers the PNG library uses
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PNGHDRS=$(PNGH) $(PNGCONF) pngusr.h
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PNGOBJS=png$(O) pngerror$(O) pngget$(O) pngmem$(O) \
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pngread$(O) pngrio$(O) pngrtran$(O) pngrutil$(O) \
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pngset$(O) pngtrans$(O) $(ZOBJS)
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pngset$(O) pngtrans$(O)
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PROGSRCS= pngm2pnm$(C)
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PROGHDRS=
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PROGDOCS=
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PROGOBJS= pngm2pnm$(O)
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OBJS = $(PROGOBJS) $(PNGOBJS) $(ZOBJS)
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# implicit make rules -------------------------------------------------------
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.c$(O): png.h pngconf.h pngpriv.h pngusr.h zlib.h
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# note: dependencies do not work on implicit rule lines
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.c$(O):
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$(CC) -c $(CFLAGS) $<
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# dependencies
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@@ -34,11 +89,62 @@ all: pngm2pnm$(E)
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pngm2pnm$(E): $(OBJS)
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$(LD) -o pngm2pnm$(E) $(OBJS)
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strip pngm2pnm$(E)
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# The DFA_XTRA setting turns all libpng options off then
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# turns on those required for this minimal build.
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# The CPP_FLAGS setting causes pngusr.h to be included in
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# both the build of pnglibconf.h and, subsequently, when
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# building libpng itself.
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$(PNGCONF): $(PNGSRC)/scripts/pnglibconf.mak\
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$(PNGSRC)/scripts/pnglibconf.dfa \
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$(PNGSRC)/scripts/options.awk pngusr.h pngusr.dfa
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$(RM) pnglibconf.h pnglibconf.dfn
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$(MAKE) $(MAKEFLAGS) -f $(PNGSRC)/scripts/pnglibconf.mak\
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srcdir=$(PNGSRC) CPPFLAGS="-DPNG_USER_CONFIG"\
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DFA_XTRA="pngusr.dfa" $@
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clean:
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$(MAKE) $(MAKEFLAGS) -f $(PNGSRC)/scripts/pnglibconf.mak\
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srcdir=$(PNGSRC) clean
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$(RM) pngm2pnm$(O)
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$(RM) pngm2pnm$(E)
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$(RM) $(OBJS)
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# distclean also removes the copied source and headers
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distclean: clean
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$(RM) -r scripts # historical reasons
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$(RM) $(PNGSRCS) $(PNGH)
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$(RM) $(ZSRCS) $(ZH) $(ZCONF)
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$(RM) $(PROGSRCS) $(PROGHDRS) $(PROGDOCS)
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# Header file dependencies:
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$(PROGOBJS): $(PROGHDRS) $(PNGINC) $(ZINC)
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$(PNGOBJS): $(PNGHDRS) $(ZINC)
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$(ZOBJS): $(ZHDRS)
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# Gather the source code from the respective directories
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$(PNGSRCS) $(PNGH): $(PNGSRC)/$@
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$(RM) $@
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$(COPY) $(PNGSRC)/$@ $@
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# No dependency on the ZLIBSRC target so that it only needs
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# to be specified once.
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$(ZSRCS) $(ZH):
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$(RM) $@
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$(COPY) $(ZLIBSRC)/$@ $@
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# The unconfigured zconf.h varies in name according to the
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# zlib release
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$(ZCONF):
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$(RM) $@
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@for f in zconf.h.in zconf.in.h zconf.h; do\
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test -r $(ZLIBSRC)/$$f &&\
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echo $(COPY) $(ZLIBSRC)/$$f $@ &&\
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$(COPY) $(ZLIBSRC)/$$f $@ && exit 0;\
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done; echo copy: $(ZLIBSRC)/zconf.h not found; exit 1
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pngm2pnm.c: $(PROGSRC)/png2pnm.c
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$(RM) $@
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$(COPY) $(PROGSRC)/png2pnm.c $@
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# End of makefile for pngm2pnm
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39
contrib/pngminim/decoder/pngusr.dfa
Normal file
39
contrib/pngminim/decoder/pngusr.dfa
Normal file
@@ -0,0 +1,39 @@
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# pngminim/decoder/pngusr.dfa
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#
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# Copyright (c) 2010-2011 Glenn Randers-Pehrson
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#
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# This code is released under the libpng license.
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# For conditions of distribution and use, see the disclaimer
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# and license in png.h
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# First all the build options off:
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everything = off
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# All that is required is some read code. This example switches
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# on the sequential read code (see ../preader for a progressive
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# read example).
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option SEQUENTIAL_READ on
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# You must choose fixed or floating point arithmetic:
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# option FLOATING_POINT on
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option FIXED_POINT on
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# You must chose the internal fixed point implementation or to
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# use the system floating point. The latter is considerably
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# smaller (by about 1kbyte on an x86 system):
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# option FLOATING_ARITHMETIC on
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option FLOATING_ARITHMETIC off
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# Your program will probably need other options. The example
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# program here, pngm2pnm, requires the following. Take a look
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# at pnglibconf.h to find out the full set of what has to be
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# enabled to make the following work.
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option SETJMP on
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option STDIO on
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option READ_EXPAND on
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option READ_STRIP_16_TO_8 on
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@@ -1,6 +1,6 @@
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/* minrdpngconf.h: headers to make a minimal png-read-only library
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*
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* Copyright (c) 2007, 2009 Glenn Randers-Pehrson
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* Copyright (c) 2007, 2010-2011 Glenn Randers-Pehrson
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*
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* This code is released under the libpng license.
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* For conditions of distribution and use, see the disclaimer
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@@ -12,62 +12,12 @@
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#ifndef MINRDPNGCONF_H
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#define MINRDPNGCONF_H
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#ifdef NJET
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/* No 16-bit support beyond reading with strip_16 */
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#endif
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/* To include pngusr.h set -DPNG_USER_CONFIG in CPPFLAGS */
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/* List options to turn off features of the build that do not
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* affect the API (so are not recorded in pnglibconf.h)
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*/
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#define PNG_NO_WARNINGS
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#define png_warning(s1,s2) ""
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#define png_chunk_warning(s1,s2) ""
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#define PNG_NO_ERROR_TEXT
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#define png_error(s1,s2) png_err(s1)
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#define png_chunk_error(s1,s2) png_err(s1)
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#define PNG_NO_READ_GAMMA
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#define PNG_NO_READ_BACKGROUND
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#define PNG_NO_READ_DITHER
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#define PNG_NO_READ_INVERT
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#define PNG_NO_READ_SHIFT
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#define PNG_NO_READ_PACK
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#define PNG_NO_READ_PACKSWAP
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#define PNG_NO_READ_FILLER
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#define PNG_NO_READ_SWAP
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#define PNG_NO_READ_SWAP_ALPHA
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#define PNG_NO_READ_INVERT_ALPHA
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#define PNG_NO_READ_RGB_TO_GRAY
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#define PNG_NO_READ_USER_TRANSFORM
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#define PNG_NO_READ_bKGD
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#define PNG_NO_READ_cHRM
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#define PNG_NO_READ_gAMA
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#define PNG_NO_READ_hIST
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#define PNG_NO_READ_iCCP
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#define PNG_NO_READ_pCAL
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#define PNG_NO_READ_pHYs
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#define PNG_NO_READ_sBIT
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#define PNG_NO_READ_sCAL
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#define PNG_NO_READ_sPLT
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#define PNG_NO_READ_sRGB
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#define PNG_NO_READ_TEXT
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#define PNG_NO_READ_tIME
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#define PNG_NO_READ_UNKNOWN_CHUNKS
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#define PNG_NO_READ_USER_CHUNKS
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#define PNG_NO_READ_EMPTY_PLTE
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#define PNG_NO_READ_OPT_PLTE
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#define PNG_NO_READ_STRIP_ALPHA
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#define PNG_NO_READ_oFFs
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#define PNG_NO_WRITE_SUPPORTED
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#define PNG_NO_INFO_IMAGE
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#define PNG_NO_USER_MEM
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#define PNG_NO_FIXED_POINT_SUPPORTED
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#define PNG_NO_MNG_FEATURES
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#define PNG_NO_USER_TRANSFORM_PTR
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#define PNG_NO_HANDLE_AS_UNKNOWN
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#define PNG_NO_CONSOLE_IO
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#define PNG_NO_ZALLOC_ZERO
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#define PNG_NO_ERROR_NUMBERS
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#define PNG_NO_EASY_ACCESS
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#define PNG_NO_PROGRESSIVE_READ
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#endif /* MINRDPNGCONF_H */
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