Sweden-Number/tools/buildicon

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#! /usr/bin/perl -w
#
# Render SVG files containing multiple images
#
# Copyright (C) 2010 Joel Holdsworth
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library 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
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
use strict;
use warnings;
use XML::Parser;
use MIME::Base64;
# Parse the parameters
my $svgFileName = $ARGV[0];
my $icoFileName = $ARGV[1];
die "Cannot open SVG file" unless defined($svgFileName);
die "Cannot open ICO file" unless defined($icoFileName);
my $renderedSVGFileName = "$svgFileName.ico";
$icoFileName =~ m/(.*)\.ico/;
my $icoName = $1;
my @pngFiles;
# Get the programs from the environment variables
my $convert = $ENV{"CONVERT"} || "convert";
my $rsvg = $ENV{"RSVG"} || "rsvg";
my $icotool = $ENV{"ICOTOOL"} || "icotool";
sub cleanup()
{
unlink $renderedSVGFileName;
unlink $_ foreach(@pngFiles);
}
$SIG{"INT"} = "cleanup";
$SIG{"HUP"} = "cleanup";
$SIG{"TERM"} = "cleanup";
$SIG{"__DIE__"} = "cleanup";
# run a shell command and die on error
sub shell(@)
{
my @args = @_;
system(@args) == 0 or die "@args failed: $?";
}
sub svg_element_start
{
my($expat, $element, %attr) = @_;
# Parse the id for icon format
my $id = $attr{'id'};
return unless defined($id);
return unless $id =~ /icon:(\d*)-(\d*)/;
my $size = $1;
my $depth = $2;
return unless defined($size) and defined($depth);
warn "Unexpected icon depth" unless
$depth == 4 or $depth == 8 or $depth == 32;
my $pngFileName = "$icoName-$size-$depth.png";
if($element eq "rect") {
# Extract SVG vector images
my $x = $attr{'x'};
my $y = $attr{'y'};
if(defined($x) and defined($x)) {
if($x =~ /\d*/ and $y =~ /\d*/) {
shell $convert, $renderedSVGFileName, "-crop", "${size}x${size}+$x+$y", $pngFileName;
}
}
} elsif($element eq "image" ) {
# Extract Base64 encoded PNG data to files
my $xlinkHref = $attr{'xlink:href'};
if(defined($xlinkHref)) {
$xlinkHref =~ /data:image\/png;base64(.*)/;
my $imageEncodedData = $1;
if(defined $imageEncodedData) {
open(FILE, '>' . $pngFileName) or die "$!";
print FILE decode_base64($imageEncodedData);
close FILE;
}
}
} else {
return;
}
push(@pngFiles, $pngFileName);
}
sub resize_image
{
# Use ImageMagick to stretch the image
my($size) = @_;
my $pngFileName = "$icoName-$size.png";
shell $convert, $renderedSVGFileName, "-resize", "${size}x${size}", $pngFileName;
push(@pngFiles, $pngFileName);
}
sub fallback_render
{
resize_image(16);
resize_image(32);
resize_image(48);
}
# Render the SVG image
shell 'rsvg', $svgFileName, $renderedSVGFileName;
# Render the images in the SVG
my $parser = new XML::Parser(
Handlers => {Start => \&svg_element_start});
$parser->parsefile("$svgFileName");
# If no render directives were found, this is an old-style icon
# which should be rendered with the old build rule
fallback_render unless(@pngFiles);
# Combine them into an ICO file
shell $icotool, "-c", "-o", $icoFileName, @pngFiles;
# Delete the intermediate images
unlink $renderedSVGFileName;
unlink $_ foreach(@pngFiles);