sng-1.1.0/0000775000175000017500000000000012645111106007300 500000000000000sng-1.1.0/main.c0000664000175000017500000001254212644025053010320 00000000000000#include #include #include #include #include #include #include #include "png.h" #include "sng.h" #include "config.h" int verbose; int idat; png_struct *png_ptr; png_info *info_ptr; /************************************************************************* * * Error and allocation functions * ************************************************************************/ int linenum; char *file; FILE *yyin; void fatal(const char *fmt, ... ) /* throw an error distinguishable from PNG library errors */ { char buf[BUFSIZ]; va_list ap; /* error message format can be stepped through by Emacs */ if (!file) buf[0] = '\0'; else if (linenum == EOF) sprintf(buf, "%s:EOF: ", file); else sprintf(buf, "%s:%d: ", file, linenum); va_start(ap, fmt); vsprintf(buf + strlen(buf), fmt, ap); va_end(ap); strcat(buf, "\n"); fputs(buf, stderr); if (png_ptr) longjmp(png_jmpbuf(png_ptr), 2); else exit(2); } void *xalloc(unsigned long s) { void *p=malloc((size_t)s); if (p==NULL) { fatal("out of memory"); } return p; } void *xrealloc(void *p, unsigned long s) { p=realloc(p,(size_t)s); if (p==NULL) { fatal("out of memory"); } return p; } char *xstrdup(char *s) { char *r = xalloc(strlen(s) + 1); strcpy(r, s); return(r); } /************************************************************************* * * Hash initialization * ************************************************************************/ #undef HASHDEBUG void initialize_hash(int hashfunc(color_item *), color_item *hashbuckets[], int *initialized) /* initialize color lookup by given hash function */ { if (!*initialized) { FILE *fp; int red, green, blue; char line[BUFSIZ], namebuf[BUFSIZ]; (*initialized)++; if ((fp = fopen(RGBTXT, "r")) == NULL) fatal("RGB database %s is missing.", RGBTXT); else { int st; color_item sc; for (;;) { if (fgets(line, sizeof(line) - 1, fp) == NULL) break; st = sscanf(line, "%d %d %d %[^\n]\n", &red, &green, &blue, namebuf); if (feof(fp)) break; else if (st == 4) { color_item *op, *newcolor, **hashbucket; #ifdef HASHDEBUG printf("* Caching %s = (%u, %u, %u) => %d\n", namebuf, red, green, blue, hashfunc(&sc)); #endif /* HASHDEBUG */ sc.r = (unsigned char)red; sc.g = (unsigned char)green; sc.b = (unsigned char)blue; sc.name = namebuf; hashbucket = &hashbuckets[hashfunc(&sc)]; newcolor = xalloc(sizeof(color_item)); memcpy(newcolor, &sc, sizeof(color_item)); newcolor->name = xstrdup(namebuf); op = *hashbucket; *hashbucket = newcolor; newcolor->next = op; } } fclose(fp); } } } /************************************************************************* * * Utility functions * ************************************************************************/ static int max(int x, int y) { return x > y ? x : y; } int main(int argc, char *argv[]) { int i = 1; int error_status = 0; #ifdef __EMX__ _wildcard(&argc, &argv); /* Unix-like globbing for OS/2 and DOS */ #endif while(argc > 1 && argv[1][0] == '-') { switch(argv[1][i]) { case '\0': argc--; argv++; i = 1; break; case 'v': ++verbose; i++; break; case 'i': /* dump raw IDAT chunks - unimplemented, undocumented */ ++idat; i++; break; case 'V': fprintf(stdout, "sng version " VERSION " by Eric S. Raymond.\n"); exit(0); case 'h': default: fprintf(stderr, "sng: unknown option %c\n", argv[1][i]); exit(1); } } if (argc == 1) { if (isatty(0)) fprintf(stderr, "sng: usage sng [-v] [file...]\n"); else { int c = getchar(); ungetc(c, stdin); if (isprint(c)) exit(sngc(stdin, "stdin", stdout)); else exit(sngd(stdin, "stdin", stdout)); } } else { for (i = 1; i < argc; i++) { int sng2png, dot = strlen(argv[i]) - 4; char outfile[BUFSIZ]; FILE *fpin, *fpout; if (argv[i][dot] != '.') { fprintf(stderr, "sng: %s is neither SNG nor PNG\n", argv[i]); error_status = max(error_status, 1); continue; } else if (strcmp(argv[i] + dot, ".sng") == 0) { sng2png = TRUE; strncpy(outfile, argv[i], dot); outfile[dot] = '\0'; strcat(outfile, ".png"); } else if (strcmp(argv[i] + dot, ".png") == 0) { sng2png = FALSE; strncpy(outfile, argv[i], dot); outfile[dot] = '\0'; strcat(outfile, ".sng"); } else { fprintf(stderr, "sng: %s is neither SNG nor PNG\n", argv[i]); error_status = max(error_status, 1); continue; } if (verbose) printf("sng: converting %s to %s\n", argv[i], outfile); if ((fpin = fopen(argv[i], "r")) == NULL) { fprintf(stderr, "sng: couldn't open %s for input (%d)\n", argv[i], errno); error_status = max(error_status, 1); continue; } if ((fpout = fopen(outfile, "w")) == NULL) { fprintf(stderr, "sng: couldn't open %s for output (%d)\n", outfile, errno); error_status = max(error_status, 1); continue; } if (sng2png) error_status = max(error_status, sngc(fpin, argv[i], fpout)); else error_status = max(error_status, sngd(fpin, argv[i], fpout)); } } return error_status; } sng-1.1.0/depcomp0000755000175000017500000005601612644020010010573 00000000000000#! /bin/sh # depcomp - compile a program generating dependencies as side-effects scriptversion=2013-05-30.07; # UTC # Copyright (C) 1999-2014 Free Software Foundation, Inc. # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation; either version 2, or (at your option) # any later version. # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # You should have received a copy of the GNU General Public License # along with this program. If not, see . # As a special exception to the GNU General Public License, if you # distribute this file as part of a program that contains a # configuration script generated by Autoconf, you may include it under # the same distribution terms that you use for the rest of that program. # Originally written by Alexandre Oliva . case $1 in '') echo "$0: No command. Try '$0 --help' for more information." 1>&2 exit 1; ;; -h | --h*) cat <<\EOF Usage: depcomp [--help] [--version] PROGRAM [ARGS] Run PROGRAMS ARGS to compile a file, generating dependencies as side-effects. Environment variables: depmode Dependency tracking mode. source Source file read by 'PROGRAMS ARGS'. object Object file output by 'PROGRAMS ARGS'. DEPDIR directory where to store dependencies. depfile Dependency file to output. tmpdepfile Temporary file to use when outputting dependencies. libtool Whether libtool is used (yes/no). Report bugs to . EOF exit $? ;; -v | --v*) echo "depcomp $scriptversion" exit $? ;; esac # Get the directory component of the given path, and save it in the # global variables '$dir'. Note that this directory component will # be either empty or ending with a '/' character. This is deliberate. set_dir_from () { case $1 in */*) dir=`echo "$1" | sed -e 's|/[^/]*$|/|'`;; *) dir=;; esac } # Get the suffix-stripped basename of the given path, and save it the # global variable '$base'. set_base_from () { base=`echo "$1" | sed -e 's|^.*/||' -e 's/\.[^.]*$//'` } # If no dependency file was actually created by the compiler invocation, # we still have to create a dummy depfile, to avoid errors with the # Makefile "include basename.Plo" scheme. make_dummy_depfile () { echo "#dummy" > "$depfile" } # Factor out some common post-processing of the generated depfile. # Requires the auxiliary global variable '$tmpdepfile' to be set. aix_post_process_depfile () { # If the compiler actually managed to produce a dependency file, # post-process it. if test -f "$tmpdepfile"; then # Each line is of the form 'foo.o: dependency.h'. # Do two passes, one to just change these to # $object: dependency.h # and one to simply output # dependency.h: # which is needed to avoid the deleted-header problem. { sed -e "s,^.*\.[$lower]*:,$object:," < "$tmpdepfile" sed -e "s,^.*\.[$lower]*:[$tab ]*,," -e 's,$,:,' < "$tmpdepfile" } > "$depfile" rm -f "$tmpdepfile" else make_dummy_depfile fi } # A tabulation character. tab=' ' # A newline character. nl=' ' # Character ranges might be problematic outside the C locale. # These definitions help. upper=ABCDEFGHIJKLMNOPQRSTUVWXYZ lower=abcdefghijklmnopqrstuvwxyz digits=0123456789 alpha=${upper}${lower} if test -z "$depmode" || test -z "$source" || test -z "$object"; then echo "depcomp: Variables source, object and depmode must be set" 1>&2 exit 1 fi # Dependencies for sub/bar.o or sub/bar.obj go into sub/.deps/bar.Po. depfile=${depfile-`echo "$object" | sed 's|[^\\/]*$|'${DEPDIR-.deps}'/&|;s|\.\([^.]*\)$|.P\1|;s|Pobj$|Po|'`} tmpdepfile=${tmpdepfile-`echo "$depfile" | sed 's/\.\([^.]*\)$/.T\1/'`} rm -f "$tmpdepfile" # Avoid interferences from the environment. gccflag= dashmflag= # Some modes work just like other modes, but use different flags. We # parameterize here, but still list the modes in the big case below, # to make depend.m4 easier to write. Note that we *cannot* use a case # here, because this file can only contain one case statement. if test "$depmode" = hp; then # HP compiler uses -M and no extra arg. gccflag=-M depmode=gcc fi if test "$depmode" = dashXmstdout; then # This is just like dashmstdout with a different argument. dashmflag=-xM depmode=dashmstdout fi cygpath_u="cygpath -u -f -" if test "$depmode" = msvcmsys; then # This is just like msvisualcpp but w/o cygpath translation. # Just convert the backslash-escaped backslashes to single forward # slashes to satisfy depend.m4 cygpath_u='sed s,\\\\,/,g' depmode=msvisualcpp fi if test "$depmode" = msvc7msys; then # This is just like msvc7 but w/o cygpath translation. # Just convert the backslash-escaped backslashes to single forward # slashes to satisfy depend.m4 cygpath_u='sed s,\\\\,/,g' depmode=msvc7 fi if test "$depmode" = xlc; then # IBM C/C++ Compilers xlc/xlC can output gcc-like dependency information. gccflag=-qmakedep=gcc,-MF depmode=gcc fi case "$depmode" in gcc3) ## gcc 3 implements dependency tracking that does exactly what ## we want. Yay! Note: for some reason libtool 1.4 doesn't like ## it if -MD -MP comes after the -MF stuff. Hmm. ## Unfortunately, FreeBSD c89 acceptance of flags depends upon ## the command line argument order; so add the flags where they ## appear in depend2.am. Note that the slowdown incurred here ## affects only configure: in makefiles, %FASTDEP% shortcuts this. for arg do case $arg in -c) set fnord "$@" -MT "$object" -MD -MP -MF "$tmpdepfile" "$arg" ;; *) set fnord "$@" "$arg" ;; esac shift # fnord shift # $arg done "$@" stat=$? if test $stat -ne 0; then rm -f "$tmpdepfile" exit $stat fi mv "$tmpdepfile" "$depfile" ;; gcc) ## Note that this doesn't just cater to obsosete pre-3.x GCC compilers. ## but also to in-use compilers like IMB xlc/xlC and the HP C compiler. ## (see the conditional assignment to $gccflag above). ## There are various ways to get dependency output from gcc. Here's ## why we pick this rather obscure method: ## - Don't want to use -MD because we'd like the dependencies to end ## up in a subdir. Having to rename by hand is ugly. ## (We might end up doing this anyway to support other compilers.) ## - The DEPENDENCIES_OUTPUT environment variable makes gcc act like ## -MM, not -M (despite what the docs say). Also, it might not be ## supported by the other compilers which use the 'gcc' depmode. ## - Using -M directly means running the compiler twice (even worse ## than renaming). if test -z "$gccflag"; then gccflag=-MD, fi "$@" -Wp,"$gccflag$tmpdepfile" stat=$? if test $stat -ne 0; then rm -f "$tmpdepfile" exit $stat fi rm -f "$depfile" echo "$object : \\" > "$depfile" # The second -e expression handles DOS-style file names with drive # letters. sed -e 's/^[^:]*: / /' \ -e 's/^['$alpha']:\/[^:]*: / /' < "$tmpdepfile" >> "$depfile" ## This next piece of magic avoids the "deleted header file" problem. ## The problem is that when a header file which appears in a .P file ## is deleted, the dependency causes make to die (because there is ## typically no way to rebuild the header). We avoid this by adding ## dummy dependencies for each header file. Too bad gcc doesn't do ## this for us directly. ## Some versions of gcc put a space before the ':'. On the theory ## that the space means something, we add a space to the output as ## well. hp depmode also adds that space, but also prefixes the VPATH ## to the object. Take care to not repeat it in the output. ## Some versions of the HPUX 10.20 sed can't process this invocation ## correctly. Breaking it into two sed invocations is a workaround. tr ' ' "$nl" < "$tmpdepfile" \ | sed -e 's/^\\$//' -e '/^$/d' -e "s|.*$object$||" -e '/:$/d' \ | sed -e 's/$/ :/' >> "$depfile" rm -f "$tmpdepfile" ;; hp) # This case exists only to let depend.m4 do its work. It works by # looking at the text of this script. This case will never be run, # since it is checked for above. exit 1 ;; sgi) if test "$libtool" = yes; then "$@" "-Wp,-MDupdate,$tmpdepfile" else "$@" -MDupdate "$tmpdepfile" fi stat=$? if test $stat -ne 0; then rm -f "$tmpdepfile" exit $stat fi rm -f "$depfile" if test -f "$tmpdepfile"; then # yes, the sourcefile depend on other files echo "$object : \\" > "$depfile" # Clip off the initial element (the dependent). Don't try to be # clever and replace this with sed code, as IRIX sed won't handle # lines with more than a fixed number of characters (4096 in # IRIX 6.2 sed, 8192 in IRIX 6.5). We also remove comment lines; # the IRIX cc adds comments like '#:fec' to the end of the # dependency line. tr ' ' "$nl" < "$tmpdepfile" \ | sed -e 's/^.*\.o://' -e 's/#.*$//' -e '/^$/ d' \ | tr "$nl" ' ' >> "$depfile" echo >> "$depfile" # The second pass generates a dummy entry for each header file. tr ' ' "$nl" < "$tmpdepfile" \ | sed -e 's/^.*\.o://' -e 's/#.*$//' -e '/^$/ d' -e 's/$/:/' \ >> "$depfile" else make_dummy_depfile fi rm -f "$tmpdepfile" ;; xlc) # This case exists only to let depend.m4 do its work. It works by # looking at the text of this script. This case will never be run, # since it is checked for above. exit 1 ;; aix) # The C for AIX Compiler uses -M and outputs the dependencies # in a .u file. In older versions, this file always lives in the # current directory. Also, the AIX compiler puts '$object:' at the # start of each line; $object doesn't have directory information. # Version 6 uses the directory in both cases. set_dir_from "$object" set_base_from "$object" if test "$libtool" = yes; then tmpdepfile1=$dir$base.u tmpdepfile2=$base.u tmpdepfile3=$dir.libs/$base.u "$@" -Wc,-M else tmpdepfile1=$dir$base.u tmpdepfile2=$dir$base.u tmpdepfile3=$dir$base.u "$@" -M fi stat=$? if test $stat -ne 0; then rm -f "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3" exit $stat fi for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3" do test -f "$tmpdepfile" && break done aix_post_process_depfile ;; tcc) # tcc (Tiny C Compiler) understand '-MD -MF file' since version 0.9.26 # FIXME: That version still under development at the moment of writing. # Make that this statement remains true also for stable, released # versions. # It will wrap lines (doesn't matter whether long or short) with a # trailing '\', as in: # # foo.o : \ # foo.c \ # foo.h \ # # It will put a trailing '\' even on the last line, and will use leading # spaces rather than leading tabs (at least since its commit 0394caf7 # "Emit spaces for -MD"). "$@" -MD -MF "$tmpdepfile" stat=$? if test $stat -ne 0; then rm -f "$tmpdepfile" exit $stat fi rm -f "$depfile" # Each non-empty line is of the form 'foo.o : \' or ' dep.h \'. # We have to change lines of the first kind to '$object: \'. sed -e "s|.*:|$object :|" < "$tmpdepfile" > "$depfile" # And for each line of the second kind, we have to emit a 'dep.h:' # dummy dependency, to avoid the deleted-header problem. sed -n -e 's|^ *\(.*\) *\\$|\1:|p' < "$tmpdepfile" >> "$depfile" rm -f "$tmpdepfile" ;; ## The order of this option in the case statement is important, since the ## shell code in configure will try each of these formats in the order ## listed in this file. A plain '-MD' option would be understood by many ## compilers, so we must ensure this comes after the gcc and icc options. pgcc) # Portland's C compiler understands '-MD'. # Will always output deps to 'file.d' where file is the root name of the # source file under compilation, even if file resides in a subdirectory. # The object file name does not affect the name of the '.d' file. # pgcc 10.2 will output # foo.o: sub/foo.c sub/foo.h # and will wrap long lines using '\' : # foo.o: sub/foo.c ... \ # sub/foo.h ... \ # ... set_dir_from "$object" # Use the source, not the object, to determine the base name, since # that's sadly what pgcc will do too. set_base_from "$source" tmpdepfile=$base.d # For projects that build the same source file twice into different object # files, the pgcc approach of using the *source* file root name can cause # problems in parallel builds. Use a locking strategy to avoid stomping on # the same $tmpdepfile. lockdir=$base.d-lock trap " echo '$0: caught signal, cleaning up...' >&2 rmdir '$lockdir' exit 1 " 1 2 13 15 numtries=100 i=$numtries while test $i -gt 0; do # mkdir is a portable test-and-set. if mkdir "$lockdir" 2>/dev/null; then # This process acquired the lock. "$@" -MD stat=$? # Release the lock. rmdir "$lockdir" break else # If the lock is being held by a different process, wait # until the winning process is done or we timeout. while test -d "$lockdir" && test $i -gt 0; do sleep 1 i=`expr $i - 1` done fi i=`expr $i - 1` done trap - 1 2 13 15 if test $i -le 0; then echo "$0: failed to acquire lock after $numtries attempts" >&2 echo "$0: check lockdir '$lockdir'" >&2 exit 1 fi if test $stat -ne 0; then rm -f "$tmpdepfile" exit $stat fi rm -f "$depfile" # Each line is of the form `foo.o: dependent.h', # or `foo.o: dep1.h dep2.h \', or ` dep3.h dep4.h \'. # Do two passes, one to just change these to # `$object: dependent.h' and one to simply `dependent.h:'. sed "s,^[^:]*:,$object :," < "$tmpdepfile" > "$depfile" # Some versions of the HPUX 10.20 sed can't process this invocation # correctly. Breaking it into two sed invocations is a workaround. sed 's,^[^:]*: \(.*\)$,\1,;s/^\\$//;/^$/d;/:$/d' < "$tmpdepfile" \ | sed -e 's/$/ :/' >> "$depfile" rm -f "$tmpdepfile" ;; hp2) # The "hp" stanza above does not work with aCC (C++) and HP's ia64 # compilers, which have integrated preprocessors. The correct option # to use with these is +Maked; it writes dependencies to a file named # 'foo.d', which lands next to the object file, wherever that # happens to be. # Much of this is similar to the tru64 case; see comments there. set_dir_from "$object" set_base_from "$object" if test "$libtool" = yes; then tmpdepfile1=$dir$base.d tmpdepfile2=$dir.libs/$base.d "$@" -Wc,+Maked else tmpdepfile1=$dir$base.d tmpdepfile2=$dir$base.d "$@" +Maked fi stat=$? if test $stat -ne 0; then rm -f "$tmpdepfile1" "$tmpdepfile2" exit $stat fi for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2" do test -f "$tmpdepfile" && break done if test -f "$tmpdepfile"; then sed -e "s,^.*\.[$lower]*:,$object:," "$tmpdepfile" > "$depfile" # Add 'dependent.h:' lines. sed -ne '2,${ s/^ *// s/ \\*$// s/$/:/ p }' "$tmpdepfile" >> "$depfile" else make_dummy_depfile fi rm -f "$tmpdepfile" "$tmpdepfile2" ;; tru64) # The Tru64 compiler uses -MD to generate dependencies as a side # effect. 'cc -MD -o foo.o ...' puts the dependencies into 'foo.o.d'. # At least on Alpha/Redhat 6.1, Compaq CCC V6.2-504 seems to put # dependencies in 'foo.d' instead, so we check for that too. # Subdirectories are respected. set_dir_from "$object" set_base_from "$object" if test "$libtool" = yes; then # Libtool generates 2 separate objects for the 2 libraries. These # two compilations output dependencies in $dir.libs/$base.o.d and # in $dir$base.o.d. We have to check for both files, because # one of the two compilations can be disabled. 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The second sed program outputs the file # name when reading, but also accumulates all include files in the # hold buffer in order to output them again at the end. This only # works with sed implementations that can handle large buffers. sed < "$tmpdepfile" -n ' /^Note: including file: *\(.*\)/ { s//\1/ s/\\/\\\\/g p }' | $cygpath_u | sort -u | sed -n ' s/ /\\ /g s/\(.*\)/'"$tab"'\1 \\/p s/.\(.*\) \\/\1:/ H $ { s/.*/'"$tab"'/ G p }' >> "$depfile" echo >> "$depfile" # make sure the fragment doesn't end with a backslash rm -f "$tmpdepfile" ;; msvc7msys) # This case exists only to let depend.m4 do its work. It works by # looking at the text of this script. This case will never be run, # since it is checked for above. exit 1 ;; #nosideeffect) # This comment above is used by automake to tell side-effect # dependency tracking mechanisms from slower ones. dashmstdout) # Important note: in order to support this mode, a compiler *must* # always write the preprocessed file to stdout, regardless of -o. "$@" || exit $? # Remove the call to Libtool. if test "$libtool" = yes; then while test "X$1" != 'X--mode=compile'; do shift done shift fi # Remove '-o $object'. IFS=" " for arg do case $arg in -o) shift ;; $object) shift ;; *) set fnord "$@" "$arg" shift # fnord shift # $arg ;; esac done test -z "$dashmflag" && dashmflag=-M # Require at least two characters before searching for ':' # in the target name. This is to cope with DOS-style filenames: # a dependency such as 'c:/foo/bar' could be seen as target 'c' otherwise. "$@" $dashmflag | sed "s|^[$tab ]*[^:$tab ][^:][^:]*:[$tab ]*|$object: |" > "$tmpdepfile" rm -f "$depfile" cat < "$tmpdepfile" > "$depfile" # Some versions of the HPUX 10.20 sed can't process this sed invocation # correctly. Breaking it into two sed invocations is a workaround. tr ' ' "$nl" < "$tmpdepfile" \ | sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' \ | sed -e 's/$/ :/' >> "$depfile" rm -f "$tmpdepfile" ;; dashXmstdout) # This case only exists to satisfy depend.m4. It is never actually # run, as this mode is specially recognized in the preamble. exit 1 ;; makedepend) "$@" || exit $? # Remove any Libtool call if test "$libtool" = yes; then while test "X$1" != 'X--mode=compile'; do shift done shift fi # X makedepend shift cleared=no eat=no for arg do case $cleared in no) set ""; shift cleared=yes ;; esac if test $eat = yes; then eat=no continue fi case "$arg" in -D*|-I*) set fnord "$@" "$arg"; shift ;; # Strip any option that makedepend may not understand. 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(tar --version) >/dev/null 2>&1 && continue am__tar='tar chf - "$$tardir"' am__tar_='tar chf - "$tardir"' am__untar='tar xf -' ;; pax) am__tar='pax -L -x $1 -w "$$tardir"' am__tar_='pax -L -x $1 -w "$tardir"' am__untar='pax -r' ;; cpio) am__tar='find "$$tardir" -print | cpio -o -H $1 -L' am__tar_='find "$tardir" -print | cpio -o -H $1 -L' am__untar='cpio -i -H $1 -d' ;; none) am__tar=false am__tar_=false am__untar=false ;; esac # If the value was cached, stop now. We just wanted to have am__tar # and am__untar set. test -n "${am_cv_prog_tar_$1}" && break # tar/untar a dummy directory, and stop if the command works. rm -rf conftest.dir mkdir conftest.dir echo GrepMe > conftest.dir/file AM_RUN_LOG([tardir=conftest.dir && eval $am__tar_ >conftest.tar]) rm -rf conftest.dir if test -s conftest.tar; then AM_RUN_LOG([$am__untar /dev/null 2>&1 && break fi done rm -rf conftest.dir AC_CACHE_VAL([am_cv_prog_tar_$1], [am_cv_prog_tar_$1=$_am_tool]) AC_MSG_RESULT([$am_cv_prog_tar_$1])]) AC_SUBST([am__tar]) AC_SUBST([am__untar]) ]) # _AM_PROG_TAR sng-1.1.0/sng.10000664000175000017500000002677612645110454010120 00000000000000'\" t .\" Title: sng .\" Author: [see the "AUTHOR" section] .\" Generator: DocBook XSL Stylesheets v1.78.1 .\" Date: 01/12/2016 .\" Manual: User Commands .\" Source: Open Source .\" Language: English .\" .TH "SNG" "1" "01/12/2016" "Open Source" "User Commands" .\" ----------------------------------------------------------------- .\" * Define some portability stuff .\" ----------------------------------------------------------------- .\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .\" http://bugs.debian.org/507673 .\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html .\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .ie \n(.g .ds Aq \(aq .el .ds Aq ' .\" ----------------------------------------------------------------- .\" * set default formatting .\" ----------------------------------------------------------------- .\" disable hyphenation .nh .\" disable justification (adjust text to left margin only) .ad l .\" ----------------------------------------------------------------- .\" * MAIN CONTENT STARTS HERE * .\" ----------------------------------------------------------------- .SH "NAME" sng \- compiler/decompiler for Scriptable Network Graphics .SH "SYNOPSIS" .HP \w'\fBsng\fR\ 'u \fBsng\fR [\-vV] [\fIfile\fR...] .SH "DESCRIPTION" .PP The \fBsng\fR program translates between PNG (Portable Network Graphics) format and SNG (Scriptable Network Graphics) format\&. SNG is a printable and editable minilanguage for describing PNG files\&. With sng, it is easy to view and edit exotic PNG chunks not supported by graphics editors; also, since SNG is easy to generate from scripts, sng may be useful at the end of a pipeline that programmatically generates PNG images\&. .PP An SNG description consists of a series of chunk specifications in a simple editable text format\&. These generally correspond one\-for\-one to PNG chunks\&. There is one exception; the IMAGE chunk specification is automatically translated into an IDAT chunk (doing appropriate interlacing, compression, etcetera)\&. .PP Given no file arguments, \fBsng\fR translates stdin to stdout\&. In this mode, it checks the first character\&. If that character is printable, the input stream is assumed to contain SNG; \fBsng\fR looks for an #SNG leader and tries to translate the file to PNG\&. If the character is non\-printable, the input stream is assumed to contain PNG; \fBsng\fR tries to translate it to SNG\&. .PP For each file that \fBsng\fR operates on, it does its conversion according to the file extension (\&.png or \&.sng)\&. The result file has the same name left of the dot as the original, but the opposite extension and type\&. .PP The \-V option makes \fBsng\fR identify itself and its version, then exit\&. The \-v option makes \fBsng\fR report on what files it is converting\&. .SH "SNG LANGUAGE SYNTAX" .PP In general, the SNG language is token\-oriented with tokens separated by whitespace\&. Anywhere that whitespace may appear, a `#\*(Aq comment leader causes all characters up to the next following newline to be ignored\&. The characters `:\*(Aq and `;\*(Aq are treated as whitespace, except the `;\*(Aq terminates a data element (see below)\&. .PP In the syntax descriptions below, lines between {} may occur in any order\&. Elements bracketed in [] are optional; a sequence bracketed by []* may be repeated any number of times\&. Elements separated by | are alternatives\&. Elements separated by plus signs are an attribute set; any sequence of one or more of those element tokens is valid\&. .PP The elements , , , , are byte numeric, short\-integer numeric, long\-integer numeric, and float numeric literals respectively (all unsigned)\&. The element is a signed long\-numeric literal\&. All numerics use C conventions; that is, they are decimal unless led by 0x (hex) or 0 (octal)\&. .PP The element is any number of doublequote\-delimited character string literals\&. C\-style escapes (\en, \et, \eb, \er or \e followed by octal or hex digits) are interpreted\&. The result is the concatenation of all the literals\&. .PP The element is a doublequote\-delimited PNG keyword; that is, a string of no more than 79 printable Latin\-1 characters or spaces, with no leading and no trailing and no consecutive spaces\&. .PP A element consists of a sequence of byte specifications in any of the following formats\&. Either \*(Aq}\*(Aq or \*(Aq;\*(Aq ends a data literal; `}\*(Aq also ends the enclosing chunk\&. .PP 1\&. \fBstring\fR format is an SNG string literal or sequence of string literals (see above)\&. The bytes of data are the string contents\&. .PP 2\&. \fBbase64\fR format is signaled by the leading token `base64\*(Aq\&. This encoding can only be used when the values of all bytes is less than 64\&. It encodes each byte as a single character, with decimal digits representing values 0\-9, followed by A\-Z for 10\-35, followed by a\-z for 36\-61, followed by + for 62 and / for 63\&. Base64 format can be used if the image either has total (color plus alpha) bit depth of four or less, or it is a spaletted image with 64 or fewer colors\&. Whitespace is ignored\&. Note that this encoding is only very loosely related to RFC2045 base\-64 encoding, which uses a different mapping of bytes to values, and supports encoding of arbitrary binary data\&. .PP 3\&. \fBhex\fR format is signaled by the leading token `hex\*(Aq\&. In hex format, each byte is specified by two hex digits (0123456789abcdef), most significant first\&. Whitespace is ignored\&. .PP 4\&. \fBP1\fR format is Portable Bit Map (PBM) format P1\&. A decimal height and width follow; it is a fatal error for them to fail to match the IHDR dimensions\&. Following this, the only non\-whitespace charaters are expected to be `0\*(Aq and `1\*(Aq, with the obvious values\&. Whitespace is ignored\&. .PP 5\&. \fBP3\fR format is Portable Pixel Map (PPM) format P3\&. A decimal height and width follow; it is a fatal error for them to fail to match the IHDR dimensions\&. A maximum channel value in decimal follows; it is a fatal error for any following channel value to exceed this value\&. Following this are triples of decimal channel values representing RGB triples\&. Whitespace separates decimal channel values but is otherwise ignored\&. .PP An element may be expanded to: .sp .if n \{\ .RS 4 .\} .nf (, , ) | .fi .if n \{\ .RE .\} .PP That is, it is either a paren\-enclosed list of RGB values or a string naming a color named in the X RGB database\&. Note that color names are not necessarily portable between hosts or even displays, due to different screen gammas and colorimetric biases\&. For this reason, the SNG decompiler generates color names in comments\&. .PP IMAGE segments contain unpacked and uninterlaced raster data\&. There will be exactly one IMAGE per SNG dump, containing the pixel data from all IDAT chunks, unless the \-i option is on\&. In that case, there will be multiple IDAT chunks containing raw (compressed) image data\&. .PP The options member of an IMAGE chunk (if present) sets image write transformations, supplying the third argument of the png_write_png() call used for output\&. Note that for images with a bit depth of less than 8, there is a default `packing\*(Aq transformation\&. Consult the libpng(3) manual page for details\&. .PP Every SNG file must begin with the string "#SNG", followed by optional SNG version information, followed by a colon (`:\*(Aq, ASCII 58) character\&. The remainder of the first line is ignored by SNG\&. .PP Comments in the syntax diagram describe intended semantics\&. This specification should be read in conjunction with the PNG standard\&. .sp .if n \{\ .RS 4 .\} .nf IHDR { height width bitdepth [using grayscale+color+palette+alpha] [with interlace] # Adam7 assumed if interlacing on } PLTE { []* # RGB triples or X color names } IDAT { } gAMA {} cHRM { white (,) # White point x and y red (,) green (,) blue (,) } sRGB {} # Colorimetry intent, range 0\-3 iCCP { # International Color Consortium profile name profile } sBIT { red # Color images only blue # Color images only green # Color images only gray # Grayscale images only alpha # Images with alpha only } bKGD { red # Color images only blue # Color images only green # Color images only gray # Grayscale images only index # Paletted images only } hIST { [, ]* # Count must match palette size } tRNS { [gray ] # Grayscale images only [red ] # True\-color images only [green ] # True\-color images only [blue ] # True\-color images only []* # Paletted images only } pHYs { xpixels ypixels [per meter] } tIME { year month day hour minute second } tEXt { # Ordinary text chunk keyword text } zTXt { # Compressed text chunk keyword text } iTXt { # International UTF\-8 keyword language keyword translated # Translation of the keyword text [compressed] } oFFs { xoffset yoffset [unit pixels|micrometers]* } sPLT { name depth [, , ]* # Color followed by alpha and frequency } pCAL { name x0 x1 mapping linear|euler|exponential|hyperboli unit [parameters ] } sCAL { unit meter|radian width height } IMAGE { options identity+packing+packswap+invert_mono +shift+bgr+swap_alpha+invert_alpha+swap_endian+strip_filler pixels } gIFg { disposal input delay } gIFx { identifier # Must be 8 characters code # Must be 3 characters data } private { # Private chunk declaration } .fi .if n \{\ .RE .\} .SH "BUGS" .PP The \-i option doesn\*(Aqt work yet, and won\*(Aqt until libpng\*(Aqs ability to suppress special handling of IDATs is working\&. See the distribution TODO file for other minor problems\&. .SH "FILES" .PP rgb\&.txt .RS 4 The X colorname database, used for RGB\-to\-name mappings in the decompiler and name\-to\-RGB mappings in the compiler\&. .RE .SH "SEE ALSO" .PP \fBpbm\fR(5), \fBppm\fR(5)\&. .SH "AUTHOR" .PP Eric S\&. Raymond December 1999\&. The SNG home page is at \m[blue]\fBhttp://sng\&.sourceforge\&.net/\fR\m[]\&. .PP For more information about PNG, see the PNG website at <\m[blue]\fBhttp://www\&.libpng\&.org/pub/png/\fR\m[]>\&. .PP The W3C recommendation is \m[blue]\fBPortable Network Graphics (PNG) Specification (Second Edition)\fR\m[]\&\s-2\u[1]\d\s+2\&. The PNG specification is also ISO/IEC 15948\&. .SH "NOTES" .IP " 1." 4 Portable Network Graphics (PNG) Specification (Second Edition) .RS 4 \%http://www.w3.org/TR/2003/PR-PNG-20030520/index-noobject.html .RE sng-1.1.0/TODO0000644000175000017500000000746011465037352007726 00000000000000 To-do list: Author's tasks: * Make the -i option work (once the library can support suppressing normal IDAT processing). * MNG support? (May mean an MNG library has to be written first...) MNG test images are at ftp://swrinde.nde.swri.edu/pub/mng/images. Glenn adds: Also you can make all the test images you want by capturing animated GIF ad banners and converting them with ImageMagick's "convert". I've made about 450 of them and haven't yet found one that wouldn't convert. Can't post them though because they don't belong to me. Use "-quality 90" to get the best compression of typical GIF banners. Blue-sky stuff: Structured syntax for ICC profiles. See . The following is a plausible XML syntax. Would it be an improvement? [|]* {data} # Colorimetry intent, range 0-3 # International Color Consortium profile {data} {short} [, {short}]* # Count must match palette size or [{byte}]* # Paletted images only