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ceabd83dcf
AFM metrics always have 1000 font units to a scaled PostScript point, but TTF/OTF doesn't have to. The easiest way (and the one which best avoids unnecessary rounding) is to store the scale in the metrics, and change pswidth.ph to return the width in PostScript points instead of font units. Signed-off-by: H. Peter Anvin <hpa@zytor.com>
103 lines
3.3 KiB
Perl
103 lines
3.3 KiB
Perl
#!/usr/bin/perl
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## --------------------------------------------------------------------------
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##
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## Copyright 1996-2017 The NASM Authors - All Rights Reserved
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## See the file AUTHORS included with the NASM distribution for
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## the specific copyright holders.
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##
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## Redistribution and use in source and binary forms, with or without
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## modification, are permitted provided that the following
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## conditions are met:
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##
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## * Redistributions of source code must retain the above copyright
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## notice, this list of conditions and the following disclaimer.
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## * Redistributions in binary form must reproduce the above
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## copyright notice, this list of conditions and the following
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## disclaimer in the documentation and/or other materials provided
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## with the distribution.
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##
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## THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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## CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
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## INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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## MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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## DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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## CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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## SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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## NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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## LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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## HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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## CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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## OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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## EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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##
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## --------------------------------------------------------------------------
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#
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# Parse AFM metric file, returns a reference to fontdata
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#
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sub parse_afm_file($$) {
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my($filename, $filetype) = @_;
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my $fontdata = {
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widths => {},
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kern => {}
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};
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my $charmetrics = 0;
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my $kerndata = 0;
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my $charcode, $width, $name;
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my $fontfile = $filename.'.'.$filetype;
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return undef unless ( -f $fontfile );
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$fontdata->{file} = $fontfile;
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$fontdata->{type} = $filetype;
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$fontdata->{scale} = 1000; # AFM metrics always have scale 1000
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return undef unless (open(my $fh, '<', $filename.'.afm'));
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while ( my $line = <$fh> ) {
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if ( $line =~ /^\s*FontName\s+(.*)\s*$/i ) {
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$fontdata->{'name'} = $1;
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} elsif ( $line =~ /^\s*StartCharMetrics\b/i ) {
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$charmetrics = 1;
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} elsif ( $line =~ /^\s*EndCharMetrics\b/i ) {
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$charmetrics = 0;
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} elsif ( $line =~ /^\s*StartKernPairs\b/i ) {
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$kerndata = 1;
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} elsif ( $line =~ /^\s*EndKernPairs\b/i ) {
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$kerndata = 0;
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} elsif ( $charmetrics ) {
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my @data = split(/\s*;\s*/, $line);
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undef $charcode, $width, $name;
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foreach my $d ( @data ) {
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my @dd = split(/\s+/, $d);
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if ( $dd[0] eq 'C' ) {
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$charcode = $dd[1];
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} elsif ( $dd[0] eq 'WX' ) {
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$width = $dd[1];
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} elsif ( $dd[0] eq 'W' ) {
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$width = $dd[2];
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} elsif ( $dd[0] eq 'N' ) {
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$name = $dd[1];
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}
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}
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if ( defined($name) && defined($width) ) {
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$fontdata->{widths}{$name} = $width;
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}
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} elsif ( $kerndata ) {
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my($kpx, $a, $b, $adj) = split(/\s+/, $line);
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if ( $kpx eq 'KPX' ) {
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if (!exists($fontdata->{kern}{$a})) {
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$fontdata->{kern}{$a} = {};
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}
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$fontdata->{kern}{$a}{$b} = $adj;
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}
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}
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}
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return $fontdata;
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}
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1;
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