Pillow/Tests/test_file_jpeg2k.py
2014-06-10 12:10:47 +03:00

115 lines
3.4 KiB
Python

from helper import unittest, PillowTestCase, tearDownModule
from PIL import Image
from io import BytesIO
codecs = dir(Image.core)
test_card = Image.open('Tests/images/test-card.png')
test_card.load()
# OpenJPEG 2.0.0 outputs this debugging message sometimes; we should
# ignore it---it doesn't represent a test failure.
# 'Not enough memory to handle tile data'
class TestFileJpeg2k(PillowTestCase):
def setUp(self):
if "jpeg2k_encoder" not in codecs or "jpeg2k_decoder" not in codecs:
self.skipTest('JPEG 2000 support not available')
def roundtrip(self, im, **options):
out = BytesIO()
im.save(out, "JPEG2000", **options)
bytes = out.tell()
out.seek(0)
im = Image.open(out)
im.bytes = bytes # for testing only
im.load()
return im
def test_sanity(self):
# Internal version number
self.assertRegexpMatches(Image.core.jp2klib_version, '\d+\.\d+\.\d+$')
im = Image.open('Tests/images/test-card-lossless.jp2')
im.load()
self.assertEqual(im.mode, 'RGB')
self.assertEqual(im.size, (640, 480))
self.assertEqual(im.format, 'JPEG2000')
# These two test pre-written JPEG 2000 files that were not written with
# PIL (they were made using Adobe Photoshop)
def test_lossless(self):
im = Image.open('Tests/images/test-card-lossless.jp2')
im.load()
im.save('/tmp/test-card.png')
self.assert_image_similar(im, test_card, 1.0e-3)
def test_lossy_tiled(self):
im = Image.open('Tests/images/test-card-lossy-tiled.jp2')
im.load()
self.assert_image_similar(im, test_card, 2.0)
def test_lossless_rt(self):
im = self.roundtrip(test_card)
self.assert_image_equal(im, test_card)
def test_lossy_rt(self):
im = self.roundtrip(test_card, quality_layers=[20])
self.assert_image_similar(im, test_card, 2.0)
def test_tiled_rt(self):
im = self.roundtrip(test_card, tile_size=(128, 128))
self.assert_image_equal(im, test_card)
def test_tiled_offset_rt(self):
im = self.roundtrip(
test_card, tile_size=(128, 128),
tile_offset=(0, 0), offset=(32, 32))
self.assert_image_equal(im, test_card)
def test_irreversible_rt(self):
im = self.roundtrip(test_card, irreversible=True, quality_layers=[20])
self.assert_image_similar(im, test_card, 2.0)
def test_prog_qual_rt(self):
im = self.roundtrip(
test_card, quality_layers=[60, 40, 20], progression='LRCP')
self.assert_image_similar(im, test_card, 2.0)
def test_prog_res_rt(self):
im = self.roundtrip(test_card, num_resolutions=8, progression='RLCP')
self.assert_image_equal(im, test_card)
def test_reduce(self):
im = Image.open('Tests/images/test-card-lossless.jp2')
im.reduce = 2
im.load()
self.assertEqual(im.size, (160, 120))
def test_layers(self):
out = BytesIO()
test_card.save(out, 'JPEG2000', quality_layers=[100, 50, 10],
progression='LRCP')
out.seek(0)
im = Image.open(out)
im.layers = 1
im.load()
self.assert_image_similar(im, test_card, 13)
out.seek(0)
im = Image.open(out)
im.layers = 3
im.load()
self.assert_image_similar(im, test_card, 0.4)
if __name__ == '__main__':
unittest.main()
# End of file