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#!/bin/sh
# Copyright © 2018 Jamie Zawinski <jwz@jwz.org>
#
# Permission to use, copy, modify, distribute, and sell this software and its
# documentation for any purpose is hereby granted without fee, provided that
# the above copyright notice appear in all copies and that both that
# copyright notice and this permission notice appear in supporting
# documentation. No representations are made about the suitability of this
# software for any purpose. It is provided "as is" without express or
# implied warranty.
#
# Converts a binary file to a C source code string, e.g., to embed the
# contents of a PNG file by including a .h file.
#
# Created: 7-Feb-2018.
usage () {
echo "usage: $0 in.png out_png.h" >&2
exit 1
}
if [ $# != 2 ]; then usage; fi
IN="$1"
OUT="$2"
NAME=`echo "$OUT" | sed \
-e 's@^.*/@@' \
-e 's/\.[^.]*$//' \
-e 's/[-.]/_/g' \
-e 's/^\([^a-z]\)/_\1/'`;
if [ x"$PERL" = "x" ]; then PERL=perl ; fi
# On Linux, we could do this and put the raw image into a .o data segment:
# $(LD) -r -b binary $< -o $@
# but that doesn't work on MacOS.
exec $PERL -0 -pe "
BEGIN { print \"#ifdef __GNUC__\\n\";
print \"__extension__\\n\";
print \"#endif\\n\";
print \"static const unsigned char ${NAME}[] =\\n \\\"\"; }
END { print \"\\\";\\n\"; }
s/([^ -\041\043-\076\100-\133\135-\176])/sprintf(\"\\\\%03o\",ord(\$1))/gse;"\
< "$IN" > "$OUT"
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