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36 lines
1.1 KiB
Perl
Executable File
36 lines
1.1 KiB
Perl
Executable File
#!/usr/bin/perl
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use strict;
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# This script converts "space-dot" fonts to binary "glyph rows". One byte for
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# each row. In a 5x7 font, each glyph thus use 7 bytes.
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# Resulting bytes are aligned to the **left** of the byte. Therefore, for
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# a 5-bit wide char, ". . ." translates to 0b10101000
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# Left-aligned bytes are easier to work with when compositing glyphs.
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my $fn = @ARGV[0];
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unless ($fn =~ /.*(\d)x(\d)\.txt/) { die "$fn isn't a font filename" };
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my ($width, $height) = ($1, $2);
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if ($width > 8) { die "Can't have a width > 8"; }
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print STDERR "Reading a $width x $height font.\n";
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my $handle;
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unless (open($handle, '<', $fn)) { die "Can't open $fn"; }
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# We start the binary data with our first char, space, which is not in our input
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# but needs to be in our output.
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print pack('C*', (0) x $height);
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while (<$handle>) {
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unless (/( |\.){0,${width}}\n/) { die "Invalid line format '$_'"; }
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my @line = split //, $_;
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my $num = 0;
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for (my $i=0; $i<$width; $i++) {
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if (@line[$i] eq '.') {
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$num += (1 << (7-$i));
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}
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}
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print pack('C', $num);
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}
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