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# KLayout Layout Viewer
# Copyright (C) 2006-2025 Matthias Koefferlein
#
# 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, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
import pya
import unittest
import os
import sys
def compare(pb1, pb2):
if pb1.width() != pb2.width() or pb1.height() != pb2.height():
return False
for x in range(0, pb1.width()):
for y in range(0, pb1.height()):
if pb1.pixel(x, y) != pb2.pixel(x, y):
return False
return True
class LAYPixelBufferTests(unittest.TestCase):
def test_1(self):
pb = pya.PixelBuffer(10, 20)
pb.transparent = True
pb.fill(0xf0010203)
png = pb.to_png_data()
# some range because implementations may differ
self.assertGreater(len(png), 20)
self.assertLess(len(png), 200)
pb_copy = pya.PixelBuffer.from_png_data(png)
self.assertEqual(compare(pb, pb_copy), True)
ut_testtmp = os.getenv("TESTTMP", ".")
tmp = os.path.join(ut_testtmp, "tmp.png")
pb.write_png(tmp)
pb_copy = pya.PixelBuffer.read_png(tmp)
self.assertEqual(compare(pb, pb_copy), True)
# run unit tests
if __name__ == '__main__':
suite = unittest.TestLoader().loadTestsFromTestCase(LAYPixelBufferTests)
if not unittest.TextTestRunner(verbosity = 1).run(suite).wasSuccessful():
sys.exit(1)
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