from io import BytesIO from PIL import Image, Jpeg2KImagePlugin from .helper import PillowTestCase 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.assertRegex(Image.core.jp2klib_version, r"\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") self.assertEqual(im.get_format_mimetype(), "image/jp2") def test_jpf(self): im = Image.open("Tests/images/balloon.jpf") self.assertEqual(im.format, "JPEG2000") self.assertEqual(im.get_format_mimetype(), "image/jpx") def test_invalid_file(self): invalid_file = "Tests/images/flower.jpg" self.assertRaises(SyntaxError, 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_tiled_offset_too_small(self): with self.assertRaises(ValueError): self.roundtrip( test_card, tile_size=(128, 128), tile_offset=(0, 0), offset=(128, 32) ) 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_type(self): outfile = self.tempfile("temp_layers.jp2") for quality_layers in [[100, 50, 10], (100, 50, 10), None]: test_card.save(outfile, quality_layers=quality_layers) for quality_layers in ["quality_layers", ("100", "50", "10")]: self.assertRaises( ValueError, test_card.save, outfile, quality_layers=quality_layers ) 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_monochrome_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_monochrome_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. with self.assertRaises(IOError): Image.open("Tests/images/unbound_variable.jp2") def test_parser_feed(self): # Arrange from PIL import ImageFile with open("Tests/images/test-card-lossless.jp2", "rb") as f: data = f.read() # Act p = ImageFile.Parser() p.feed(data) # Assert self.assertEqual(p.image.size, (640, 480))