[devel] Revised contrib/pngminim/decoder to build and use pnglibconf.h

contrib/pngminim/decoder/makefile

@@ -5,6 +5,8 @@
 CC=gcc
 LD=$(CC)
 AWK=awk
+SED=sed
+CPP=cpp
 
 RM=rm -f
 
@@ -39,6 +41,18 @@ pnglibconf.h: pnglibconf.mak pnglibconf.dfn
 
 # used on demand to regenerate the standard header, CPPFLAGS should
 # be empty - no non-standard defines
+
+.dfn.out:
+	rm -f $@ dfn.c dfn?.out
+	echo '#include "$<"' >dfn.c
+	$(CPP) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) @LIBPNG_DEFINES@\
+	    $(CPPFLAGS) $(SYMBOL_CFLAGS) dfn.c >dfn1.out
+	$(SED) -n -e 's|^.*PNG_DEFN_MAGIC-\(.*\)-PNG_DEFN_END.*$$|\1|p'\
+	    dfn1.out >dfn2.out
+	$(SED) -e 's| *@@@ *||g' -e 's| *$$||' dfn2.out >dfn3.out
+	rm -f dfn.c dfn[12].out
+	mv dfn3.out $@
+
 pnglibconf.dfn: pnglibconf.dfa options.awk
 	rm -f $@ dfn?.out
 	test -z "$(CPPFLAGS)" 

contrib/pngminim/decoder/pngusr.h

@@ -12,10 +12,6 @@
 #ifndef MINRDPNGCONF_H
 #define MINRDPNGCONF_H
 
-#ifdef NJET
-  /* No 16-bit support beyond reading with strip_16 */
-#endif
-
 #define PNG_NO_WARNINGS
 #define png_warning(s1,s2) ""
 #define png_chunk_warning(s1,s2) ""

contrib/pngminim/encoder/gather.sh

@@ -1,9 +1,23 @@
+
+# Get the source for the pngminus application
 cp ../../pngminus/pnm2png.c pnm2pngm.c
+
+# Get the libpng sources
 cp ../../../*.h .
 cp ../../../*.c .
+
+# Get the libpng scripts for building pnglibconf.h
+cp ../../../scripts/options.awk .
+cp ../../../scripts/pnglibconf.dfa .
+sed -e "s:scripts/::g" ../../../scripts/pnglibconf.mak > pnglibconf.mak
+#14+%
+# Remove libpng sources we won't use
 rm example.c pngtest.c pngr*.c pngpread.c
-# Change the next 2 lines if zlib is somewhere else.
+
+# Get the zlib sources
+# Change the following 2 lines if zlib is somewhere else
 cp ../../../../zlib/*.h .
 cp ../../../../zlib/*.c .
-rm inf*.[ch]
+
-rm minigzip.c example.c gz*
+# Remove zlib sources we won't use
+rm minigzip.c example.c inf*.[ch] gz*

contrib/pngminim/encoder/makefile

@@ -1,13 +1,17 @@
+
 # Makefile for PngMinus (pnm2pngm)
 # Linux / Unix
 
 #CC=cc
 CC=gcc
 LD=$(CC)
+AWK=awk
+SED=sed
+CPP=cpp
 
 RM=rm -f
 
-CFLAGS=-DPNG_USER_CONFIG -DNO_GZIP -I. -O1
+CFLAGS=-DPNG_USER_CONFIG -DNO_GZCOMPRESS -DNO_GZIP -I. -O1
 
 C=.c
 O=.o
@@ -31,6 +35,35 @@ OBJS  = pnm2pngm$(O) png$(O) pngerror$(O) pngget$(O) pngmem$(O) \
 
 all: pnm2pngm$(E)
 
+# see scripts/pnglibconf.mak for more options
+pnglibconf.h: pnglibconf.mak pnglibconf.dfn
+	make -f pnglibconf.mak pnglibconf.h
+
+# used on demand to regenerate the standard header, CPPFLAGS should
+# be empty - no non-standard defines
+
+.dfn.out:
+	rm -f $@ dfn.c dfn?.out
+	echo '#include "$<"' >dfn.c
+	$(CPP) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) @LIBPNG_DEFINES@\
+	    $(CPPFLAGS) $(SYMBOL_CFLAGS) dfn.c >dfn1.out
+	$(SED) -n -e 's|^.*PNG_DEFN_MAGIC-\(.*\)-PNG_DEFN_END.*$$|\1|p'\
+	    dfn1.out >dfn2.out
+	$(SED) -e 's| *@@@ *||g' -e 's| *$$||' dfn2.out >dfn3.out
+	rm -f dfn.c dfn[12].out
+	mv dfn3.out $@
+
+pnglibconf.dfn: pnglibconf.dfa options.awk
+	rm -f $@ dfn?.out
+	test -z "$(CPPFLAGS)" 
+	echo "com @PNGLIB_VERSION@ STANDARD API DEFINITION" |\
+	$(AWK) -f options.awk pre=1 out=dfn1.out\
+	    logunsupported=1 - pnglibconf.dfa 1>&2
+	$(AWK) -f options.awk pre=0 out=dfn2.out\
+	    logunsupported=1 dfn1.out 1>&2
+	rm dfn1.out
+	mv dfn2.out $@
+
 pnm2pngm$(E): $(OBJS)
 	$(LD) -o pnm2pngm$(E) $(OBJS)
 	strip pnm2pngm$(E)
@@ -40,4 +73,4 @@ clean:
 	$(RM) pnm2pngm$(E)
 	$(RM) $(OBJS)
 
-# End of makefile for pnm2pngm
+# End of makefile for pngm2pnm