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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 image in PNG format to raw pixel data stored
# in a C structure.
import os
import png
import sys
def convert(png_file):
r = png.Reader(file=open(png_file, 'rb'))
img = r.read()
print(img);
if img[3].get("alpha") == True:
print('Detected alpha channel!');
output = open(os.path.splitext(png_file)[0] + '_img.c', 'w')
width = img[0]
height = img[1]
# Header
output.write(
"""
/* generated with png2struct.py, do not modify by hand */
static const struct {
unsigned int width, height;
unsigned char pixels[%d * %d];
} bitmap_font = {
""" % (width, height));
output.write('%d, %d,\n{' % (width, height))
if img[3].get("alpha") == True:
for row in img[2]:
for p in row[3::4]:
output.write('%d,' % p)
output.write('\n');
else:
for row in img[2]:
for p in row:
output.write('%d,' % p)
output.write('\n');
output.write('}\n};\n')
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])
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