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Small tool to create raster fonts from ttf

This commit is contained in:
Stefan `Sec` Zehl 2011-05-12 20:31:26 +02:00
parent 410bfc2e0d
commit cbacae9f70
1 changed files with 166 additions and 0 deletions
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tools/makefont.pl Normal file
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#!/usr/bin/perl -w
use GD;
use strict;
use warnings;
###
### Configure me
###
my $charlist;
for(32..126){
$charlist.=chr $_;
};
my $size=shift||17;
my $font="/usr/local/lib/X11/fonts/bitstream-vera/Vera.ttf";
my $title="Bitstream Vera Sans ".$size."pt";
###
### Code starts here.
###
my $width=2000;
my $height=100;
my $xoff=30;
my $fonts=$title;
$fonts=~s/ //g;
$fonts=~s/Bitstream//;
$fonts=~s/Sans//;
my $file=$fonts;
$file=~s/pt$//;
$file=~y/A-Z/a-z/;
### Get & optimize bounding box
my $im = new GD::Image($width,$height);
my $white = $im->colorAllocate(255,255,255);
my $black = $im->colorAllocate(0,0,0);
my @bounds = $im->stringFT(-$black, $font, $size, 0, 0, $xoff,$charlist);
my ($mx,$my)=($bounds[2],$bounds[3]);
my ($top,$bottom)=($bounds[7],$my);
die "Increase width" if $mx>$width;
die "Increase height" if $my>$width;
die "Increase xoff" if $bounds[7]<0;
my $found;
# Cut whitespace at top
do {
$found=0;
for my $x (0..$mx){
if( $im->getPixel($x,$top) == 1){
$found=1;last;
}
};
$top++;
}while($found==0);
$top--;
# Cut whitespace at bottom.
do {
$found=0;
for my $x (0..$mx){
if( $im->getPixel($x,$bottom) == 1){
$found=1;last;
}
};
$bottom--;
}while($found==0);
$bottom++;
my $pxsize=$bottom-$top+1;
my $byte=int(($pxsize-1)/8)+1; # Round up
print "Removed ",$top-$bounds[7],"px at top\n";
print "Removed ",$my-$bottom,"px at bottom\n";
print "Chars are ",$bottom-$top+1,"px ($byte bytes) high\n";
#print "x: $bounds[6] - $bounds[2]\n";
#print "y: $bounds[7] - $bounds[3]\n";
open (C,">",$file.".c")||die;
open (H,">",$file.".h")||die;
print C <<EOF
#include "$file.h"
/* Font data for $title */
/* Bitmaps */
const uint8_t ${fonts}Bitmaps[] = {
EOF
;
my $offset=0;
my @offsets;
for (1..length$charlist){
my $char=substr($charlist,$_-1,1);
# create a new image
$im = new GD::Image(2*$height,$height);
$white = $im->colorAllocate(255,255,255);
$black = $im->colorAllocate(0,0,0);
@bounds = $im->stringFT(-$black, $font, $size, 0, 0, $xoff,$char.$charlist);
my @char;
for my $y ($top..$bottom){
for my $x (0..($bounds[2]-$mx)){
my $px= $im->getPixel($x,$y);
$char[$x].=$px;
# $px=~y/01/ */; print $px;
};
# print "<\n";
};
print C "/* '",$char,"' at $offset */\n";
for (@char){
$_=reverse $_;
my $h= pack("B*",$_).(chr(0).chr(0));
for my $b (1..$byte){
printf C "0x%02x,",ord(substr($h,$b-1,1));
};
$_=~y/01/ */;
print C " /* $_ */ \n";
};
push @offsets,sprintf " {%2d,%4d}, /* %s */\n",scalar(@char),$offset,$char;
$offset+=scalar(@char)*$byte;
# print "-"x80,"\n";
};
print C <<EOF;
};
/* Character descriptors */
const FONT_CHAR_INFO ${fonts}Descriptors[] = {
EOF
print C @offsets;
my($first)=ord substr($charlist,0,1);
my($last)=$first+length($charlist)-1;
print C <<EOF;
};
/* Font info */
const struct FONT_DEF Font_$fonts = {0,$pxsize,$first,$last,
${fonts}Bitmaps,
${fonts}Descriptors,
};
EOF
print H <<EOF;
#include "fonts.h"
extern const struct FONT_DEF Font_$fonts;
EOF
close(C);
close(H);