from helper import unittest, PillowTestCase from PIL import Image, Jpeg2KImagePlugin 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) test_bytes = out.tell() out.seek(0) im = Image.open(out) im.bytes = test_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') px = im.load() self.assertEqual(px[0, 0], (0, 0, 0)) self.assertEqual(im.mode, 'RGB') self.assertEqual(im.size, (640, 480)) self.assertEqual(im.format, 'JPEG2000') def test_invalid_file(self): invalid_file = "Tests/images/flower.jpg" self.assertRaises(SyntaxError, lambda: Jpeg2KImagePlugin.Jpeg2KImageFile(invalid_file)) def test_bytesio(self): with open('Tests/images/test-card-lossless.jp2', 'rb') as f: data = BytesIO(f.read()) im = Image.open(data) im.load() self.assert_image_similar(im, test_card, 1.0e-3) # 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() outfile = self.tempfile('temp_test-card.png') im.save(outfile) 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) def test_rgba(self): # Arrange j2k = Image.open('Tests/images/rgb_trns_ycbc.j2k') jp2 = Image.open('Tests/images/rgb_trns_ycbc.jp2') # Act j2k.load() jp2.load() # Assert self.assertEqual(j2k.mode, 'RGBA') self.assertEqual(jp2.mode, 'RGBA') def test_16bit_monochrome_has_correct_mode(self): j2k = Image.open('Tests/images/16bit.cropped.j2k') jp2 = Image.open('Tests/images/16bit.cropped.jp2') j2k.load() jp2.load() self.assertEqual(j2k.mode, 'I;16') self.assertEqual(jp2.mode, 'I;16') def test_16bit_monchrome_jp2_like_tiff(self): tiff_16bit = Image.open('Tests/images/16bit.cropped.tif') jp2 = Image.open('Tests/images/16bit.cropped.jp2') self.assert_image_similar(jp2, tiff_16bit, 1e-3) def test_16bit_monchrome_j2k_like_tiff(self): tiff_16bit = Image.open('Tests/images/16bit.cropped.tif') j2k = Image.open('Tests/images/16bit.cropped.j2k') self.assert_image_similar(j2k, tiff_16bit, 1e-3) def test_16bit_j2k_roundtrips(self): j2k = Image.open('Tests/images/16bit.cropped.j2k') im = self.roundtrip(j2k) self.assert_image_equal(im, j2k) def test_16bit_jp2_roundtrips(self): jp2 = Image.open('Tests/images/16bit.cropped.jp2') im = self.roundtrip(jp2) self.assert_image_equal(im, jp2) def test_unbound_local(self): # prepatch, a malformed jp2 file could cause an UnboundLocalError # exception. try: jp2 = Image.open('Tests/images/unbound_variable.jp2') self.assertTrue(False, 'Expecting an exception') except SyntaxError as err: self.assertTrue(True, 'Expecting a syntax error') except IOError as err: self.assertTrue(True, 'Expecting an IO error') except UnboundLocalError as err: self.assertTrue(False, "Prepatch error") if __name__ == '__main__': unittest.main()