86 lines
2.6 KiB
Perl
Executable File
86 lines
2.6 KiB
Perl
Executable File
#!/usr/bin/perl
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# File by mwedel@scruz.net to deal with splitting png's.
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# Takes any number of files on the command line, but all the split images
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# are dumped in the current directory.
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# does preserve alpha channel. Tested on skree images.
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# Modification by PeterM
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# Notes: I don't really know how this script was supposed to work
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# I use it like this:
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# > mkdir out (makes an output directory so I don't clobber my input)
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# > split-png-linux.pl file.111.png
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#
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# The results end up in the directory "out"
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$PNGSIZE=32;
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for ($i=0; $i <= $#ARGV; $i++) {
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@name = split(m#/#, $ARGV[$i]);
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$source = $name[$#name];
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$#name--;
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$destdir=join(m#/#, @name);
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if ($source =~ /([\w-]+)\.(\d)(\d)(\d)\.png/ ) {
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$base = $1;
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$facing = $3;
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$animation = $4;
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} else {
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print STDERR "filename $source does not follow proper naming conventions - don't know how to name files - skipping\n";
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next;
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}
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if (!open(DESC,"pngtopnm $ARGV[$i] | pnmfile |")) {
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print STDERR "Could not run pngtopnm $source | pnmfile\n";
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next;
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}
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$desc = <DESC>;
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close(DESC);
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$desc =~ /(\d+) by (\d+)/;
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if ($1 == 0 || $2 == 0) {
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print STDERR "File $ARGV[$i] - file not described properly\n";
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next;
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}
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if (($1 % 32) || ($2 % 32)) {
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print STDERR "File $ARGV[$i] not an increment of 32x32 size - size is $1x$2\n";
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next;
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}
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$destx = $1/32;
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$desty = $2/32;
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print "File $ARGV[$i] will be split into $destx X $desty pieces\n";
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$piece = 0;
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# The order of the for loops of x and y seem non intuitive, but believe
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# me, this does left to right, top to bottom (ie, as you read and
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# english language book) in terms of part numbering.
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for ($y=0; $y < $desty; $y++) {
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for ($x=0; $x < $destx; $x++) {
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$piece ++;
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# Deal with naming convention. piece 10 should be A, A ascii
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# code starts at 65.
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if ($piece > 9 ) {
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if($piece > 9 + 26) {
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$np = chr( $piece + 55 + 6 )
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} else {
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$np = chr($piece + 55);
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}
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} else {
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$np = $piece;
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}
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$cutx = $x * 32;
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$cuty = $y * 32;
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system("pngtopnm -alpha $ARGV[$i] | pnmcut $cutx $cuty 32 32 > /tmp/alpha.$$");
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system("pngtopnm $ARGV[$i] | pnmcut $cutx $cuty 32 32 > /tmp/png.$$");
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system("pnmtopng -alpha /tmp/alpha.$$ /tmp/png.$$ > out/$base.$np$facing$animation.png");
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}
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}
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# do a little cleanup
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unlink("/tmp/alpha.$$");
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unlink("/tmp/png.$$");
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}
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# system("pngtopnm -alpha $ARGV[$i] | pnmcut -left $cutx -top $cuty -width 32 -height 32 > /tmp/alpha.$$");
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# system("pngtopnm $ARGV[$i] | pnmcut -left $cutx -top $cuty -width 32 -height 32 > /tmp/png.$$");
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