#!/usr/bin/perl
#
# Copyright (C) 2005 Luis Alejandro Gonzalez Miranda
#
# hex2sfd created in 2005 by Luis Alejandro Gonzalez Miranda, http://www.lgm.cl
#
# LICENSE:
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see .
#
#
# June 2008: modifications by Paul Hardy for the Unifont 5.1 build.
#
# July 2014: modifications by Paul Hardy as follows:
#
# - Updated comments to use Luis' full name and add a link to
# the Unifont page on savannah.gnu.org.
# - Store combining character code points for the entire Unicode
# range, not just for the Basic Multilingual Plane.
# - Change "Encoding: UnicodeBmp" by detecting whether the highest
# glyph is in the Basic Multilingual Plane or above that; if above,
# use "Encoding: Unicode" instead.
# - Add explicit definitions for three TrueType code points:
# ".notdef", ".null", and "nonmarkingreturn". These override
# the defaults that Fontforge creates. The ".notdef" and
# "nonmarkingreturn" glyphs now have widths of 8 pixels
# (512 units in the SFD output file).
# - Calculate exact number of glyphs in the font for "BeginChars" entry.
# - Convert the pixel outline drawing portion of this script
# to a subroutine.
# - Add "uni" prefix to StartChar description of Unicode code points.
#
#
# Read the list of combining characters, which will have zero width.
#
@combining = ();
for ($i = 0; $i < 0x110000; $i++) {
push (@combining, 0);
}
if ($#ARGV < 0) {
open (A, "<", "combining.txt") or die ("Cannot open combining.txt.\n");
}
else {
open (A, "<", $ARGV[0]) or die ("Cannot open specified combining file for input.\n");
}
$maxcombining = 0;
while () {
chomp;
$codepoint = hex ($_);
$combining[ $codepoint ] = 1;
if ($codepoint > $maxcombining) {
$maxcombining = $codepoint;
}
}
close (A) or die ("Cannot properly close combining input file.\n");
$nglyphs = 0; # number of glyphs in font (none defined yet)
@codepoints = (); # code points of hex bitmaps
@bitmaps = (); # the corresponding hex bitmaps
#
# Add three special characters for TrueType; use these instead of
# the Fontforge defaults for these three characters.
#
push (@codepoints, ".notdef");
push (@bitmaps, "0000007E665A5A7A76767E76767E0000");
$nglyphs++;
push (@codepoints, ".null");
push (@bitmaps, "");
$nglyphs++;
push (@codepoints, "nonmarkingreturn");
push (@bitmaps, "00000000000000000000000000000000");
$nglyphs++;
while() {
chomp;
($c,$d) = split (/:/);
push (@codepoints, $c);
push (@bitmaps, $d);
$nglyphs++;
}
$max_code_point=$codepoints[ $nglyphs - 1 ];
# Encoding tag: Is highest glyph above Plane 0?
if ($max_code_point > 0xFFFF) {
$encoding = "Unicode";
}
else {
$encoding = "UnicodeBmp";
}
#
# Modified by Paul Hardy, July 2008.
#
# Make pixel 64 units for greatest scale; floating point numbers in
# TrueType have 6 fractional bits, so this works out well (2^6 = 64).
# Also, make size of font a power of 2 (16 * 64) for efficient scaling
# to any point size in TrueType. Made bitmask a variable for easy
# experimenting.
#
$pixel = 64;
$descent = 2 * $pixel;
$ascent = 16 * $pixel - $descent;
$bitmask = 25; # round in x (doesn't really work), corner point selected
print << "END" or die ("Cannot print to stdout.\n");
SplineFontDB: 1.0
FontName: unifont
FullName: GNU Unifont
FamilyName: unifont
Weight: Medium
Comments: Created from GNU Unifont
Comments: with Luis Alejandro Gonzalez Miranda's Perl and FontForge scripts.
Comments: See http://www.lgm.cl/trabajos/unifont/index.en.html for
Comments: information on Luis' scripts. See
Comments: http://savannah.gnu.org/projects/unifont,
Comments: http://czyborra.com/unifont, and
Comments: http://unifoundry.com/unifont.html for information on GNU Unifont.
Comments: See http://fontforge.sf.net for information on FontForge.
Version: 1.00
ItalicAngle: 0
UnderlinePosition: -100
UnderlineWidth: 40
Ascent: $ascent
Descent: $descent
NeedsXUIDChange: 1
XUID: [1021 140 1293607838 5610107]
FSType: 0
PfmFamily: 33
TTFWeight: 500
TTFWidth: 5
Panose: 2 0 6 4 0 0 0 0 0 0
LineGap: 72
VLineGap: 0
OS2WinAscent: 0
OS2WinAOffset: 1
OS2WinDescent: 0
OS2WinDOffset: 1
HheadAscent: 0
HheadAOffset: 1
HheadDescent: 0
HheadDOffset: 1
ScriptLang: 1
1 latn 1 dflt
Encoding: $encoding
UnicodeInterp: none
DisplaySize: -24
AntiAlias: 1
FitToEm: 1
WinInfo: 0 50 22
TeXData: 1 0 0 346030 173015 115343 0 1048576 115343 783286 444596 497025 792723 393216 433062 380633 303038 157286 324010 404750 52429 2506097 1059062 262144
BeginChars: 65536 $nglyphs
END
#
# Print outlines for all glyphs using Fontforge's
# Spline Font Database (.sfd) format.
#
# $count=0; # number of glyphs created so far.
for ($count = 0; $count < $nglyphs; $count++) {
$c = $codepoints[ $count ];
$d = $bitmaps[ $count ];
outline ($count, $c, $d);
}
# while () {
# chomp;
# ($c,$d)=split(/:/);
# outline ($count, $c, $d);
# $count++;
# }
print << "END" or die ("Cannot print to stdout.\n");
EndChars
EndSplineFont
END
exit;
#
# Print the outlines of a glyph's pixels.
#
# Parameters:
# - Position in font
# - Glyph non-Unicode name or Unicode hexadecimal code point
# - Unifont hexadecimal string to render glyph.
#
sub outline {
my $count = $_[0];
my $c = $_[1];
my $d = $_[2];
$width=length($d)/4;
$ptwidth=$pixel * $width;
if ( $c =~ m/^[0-9A-Fa-f]+$/ ) {
$charname = "uni$c";
if ($combining[ hex($c) ]) {
$ptwidth = 0;
}
$cn = hex ($c);
}
else {
$charname = $c;
$cn = -1;
}
# Changed "Flags: H" to "Flags: HW" to fix spaces - Paul Hardy, 2008
print << "END" or die ("Cannot print to stdout.\n");
StartChar: $charname
Encoding: $cn $cn $count
Width: $ptwidth
Flags: HW
TeX: 0 0 0 0
Fore
END
for($i=0;$i<16;$i++) {
$l=substr($d, $i*$width/4, $width/4);
$num=hex($l);
$prev=0;
for($j=0; $j<$width; $j++) {
$x=$width - 1 - $j;
$y=15 - $i;
if($num%2) {
# point at i, width-1-j
if(!$prev) {
$x1=$x * $pixel + $pixel;
$y1=$y * $pixel - $descent;
$x2=$x1 + $pixel;
$y2=$y1 + $pixel;
}
$prev=1;
} else {
if($prev) {
$x2=$x * $pixel + $pixel;
print << "END" or die ("Cannot print to stdout.\n");
$x1 $y1 m $bitmask
$x1 $y2 l $bitmask
$x2 $y2 l $bitmask
$x2 $y1 l $bitmask
$x1 $y1 l $bitmask
END
}
$prev=0;
}
$num=int($num/2);
}
if($prev) {
$x2=0;
print << "END" or die ("Cannot print to stdout.\n");
$x1 $y1 m $bitmask
$x1 $y2 l $bitmask
$x2 $y2 l $bitmask
$x2 $y1 l $bitmask
$x1 $y1 l $bitmask
END
}
}
print << "END" or die ("Cannot print to stdout.\n");
EndSplineSet
EndChar
END
}