kicad/tools/gal_bitmap_font/fnt2struct.py

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#!/usr/bin/env python
# This program source code file is part of KiCad, a free EDA CAD application.
#
# Copyright (C) 2016 CERN
# @author Maciej Suminski <maciej.suminski@cern.ch>
#
# 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, you may find one here:
# http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
# or you may search the http://www.gnu.org website for the version 2 license,
# or you may write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
# Converts a bitmap font atlas description in XML format to data stored
# in a C structure.
import xml.etree.cElementTree as ET
import sys
import os
def convert(xml_file):
tree = ET.ElementTree(file=xml_file)
root = tree.getroot()
output = open(os.path.splitext(xml_file)[0] + '_desc.c', 'w')
# Header
output.write(
"""
/* generated with fnt2struct.py, do not modify by hand */
static const struct bitmap_glyph {
unsigned int x, y;
unsigned int width, height;
int x_off, y_off;
} bitmap_chars[] = {
""");
last_id = 0
fallback_line = '{ 0, 0, 0, 0, 0, 0 },\t\t/* %d (not defined) */\n'
for char in root.iter('char'):
cur_id = int(char.attrib['id'])
# Fill gaps for the missing characters
while(cur_id > last_id):
output.write(fallback_line % last_id)
last_id = last_id + 1
output.write('{ %d, %d, %d, %d, %d, %d },\t/* %d */\n' %
(int(char.attrib['x']), int(char.attrib['y']),
int(char.attrib['width']), int(char.attrib['height']),
int(char.attrib['xoffset']), int(char.attrib['yoffset']),
cur_id))
last_id = cur_id + 1
output.write('};\n')
output.write('static const int bitmap_chars_count = %d;\n' % last_id)
try:
lineHeight = int(root.find('common').get('lineHeight'))
except:
print('Could not determine the font height')
lineHeight = -1
output.write('static const int bitmap_chars_height = %d;\n' % (lineHeight))
output.close()
#----------------------------------------------------------------------
if __name__ == "__main__":
argc = len(sys.argv)
if(argc == 2):
convert(sys.argv[1])
else:
print("usage: %s <xml-file>" % sys.argv[0])