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d50445ff30
Similar to the recent adoption of Black. isort is a Python utility to sort imports alphabetically and automatically separate into sections. By using isort, contributors can quickly and automatically conform to the projects style without thinking. Just let the tool do it. Uses the configuration recommended by the Black to avoid conflicts of style. Rewrite TestImageQt.test_deprecated to no rely on import order.
207 lines
6.4 KiB
Python
207 lines
6.4 KiB
Python
from io import BytesIO
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from PIL import Image, Jpeg2KImagePlugin
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from .helper import PillowTestCase
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codecs = dir(Image.core)
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test_card = Image.open("Tests/images/test-card.png")
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test_card.load()
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# OpenJPEG 2.0.0 outputs this debugging message sometimes; we should
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# ignore it---it doesn't represent a test failure.
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# 'Not enough memory to handle tile data'
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class TestFileJpeg2k(PillowTestCase):
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def setUp(self):
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if "jpeg2k_encoder" not in codecs or "jpeg2k_decoder" not in codecs:
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self.skipTest("JPEG 2000 support not available")
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def roundtrip(self, im, **options):
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out = BytesIO()
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im.save(out, "JPEG2000", **options)
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test_bytes = out.tell()
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out.seek(0)
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im = Image.open(out)
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im.bytes = test_bytes # for testing only
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im.load()
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return im
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def test_sanity(self):
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# Internal version number
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self.assertRegex(Image.core.jp2klib_version, r"\d+\.\d+\.\d+$")
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im = Image.open("Tests/images/test-card-lossless.jp2")
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px = im.load()
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self.assertEqual(px[0, 0], (0, 0, 0))
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self.assertEqual(im.mode, "RGB")
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self.assertEqual(im.size, (640, 480))
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self.assertEqual(im.format, "JPEG2000")
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self.assertEqual(im.get_format_mimetype(), "image/jp2")
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def test_jpf(self):
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im = Image.open("Tests/images/balloon.jpf")
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self.assertEqual(im.format, "JPEG2000")
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self.assertEqual(im.get_format_mimetype(), "image/jpx")
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def test_invalid_file(self):
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invalid_file = "Tests/images/flower.jpg"
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self.assertRaises(SyntaxError, Jpeg2KImagePlugin.Jpeg2KImageFile, invalid_file)
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def test_bytesio(self):
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with open("Tests/images/test-card-lossless.jp2", "rb") as f:
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data = BytesIO(f.read())
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im = Image.open(data)
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im.load()
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self.assert_image_similar(im, test_card, 1.0e-3)
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# These two test pre-written JPEG 2000 files that were not written with
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# PIL (they were made using Adobe Photoshop)
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def test_lossless(self):
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im = Image.open("Tests/images/test-card-lossless.jp2")
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im.load()
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outfile = self.tempfile("temp_test-card.png")
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im.save(outfile)
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self.assert_image_similar(im, test_card, 1.0e-3)
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def test_lossy_tiled(self):
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im = Image.open("Tests/images/test-card-lossy-tiled.jp2")
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im.load()
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self.assert_image_similar(im, test_card, 2.0)
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def test_lossless_rt(self):
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im = self.roundtrip(test_card)
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self.assert_image_equal(im, test_card)
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def test_lossy_rt(self):
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im = self.roundtrip(test_card, quality_layers=[20])
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self.assert_image_similar(im, test_card, 2.0)
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def test_tiled_rt(self):
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im = self.roundtrip(test_card, tile_size=(128, 128))
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self.assert_image_equal(im, test_card)
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def test_tiled_offset_rt(self):
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im = self.roundtrip(
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test_card, tile_size=(128, 128), tile_offset=(0, 0), offset=(32, 32)
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)
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self.assert_image_equal(im, test_card)
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def test_irreversible_rt(self):
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im = self.roundtrip(test_card, irreversible=True, quality_layers=[20])
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self.assert_image_similar(im, test_card, 2.0)
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def test_prog_qual_rt(self):
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im = self.roundtrip(test_card, quality_layers=[60, 40, 20], progression="LRCP")
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self.assert_image_similar(im, test_card, 2.0)
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def test_prog_res_rt(self):
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im = self.roundtrip(test_card, num_resolutions=8, progression="RLCP")
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self.assert_image_equal(im, test_card)
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def test_reduce(self):
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im = Image.open("Tests/images/test-card-lossless.jp2")
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im.reduce = 2
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im.load()
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self.assertEqual(im.size, (160, 120))
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def test_layers_type(self):
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outfile = self.tempfile("temp_layers.jp2")
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for quality_layers in [[100, 50, 10], (100, 50, 10), None]:
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test_card.save(outfile, quality_layers=quality_layers)
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for quality_layers in ["quality_layers", ("100", "50", "10")]:
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self.assertRaises(
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ValueError, test_card.save, outfile, quality_layers=quality_layers
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)
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def test_layers(self):
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out = BytesIO()
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test_card.save(
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out, "JPEG2000", quality_layers=[100, 50, 10], progression="LRCP"
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)
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out.seek(0)
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im = Image.open(out)
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im.layers = 1
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im.load()
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self.assert_image_similar(im, test_card, 13)
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out.seek(0)
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im = Image.open(out)
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im.layers = 3
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im.load()
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self.assert_image_similar(im, test_card, 0.4)
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def test_rgba(self):
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# Arrange
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j2k = Image.open("Tests/images/rgb_trns_ycbc.j2k")
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jp2 = Image.open("Tests/images/rgb_trns_ycbc.jp2")
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# Act
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j2k.load()
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jp2.load()
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# Assert
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self.assertEqual(j2k.mode, "RGBA")
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self.assertEqual(jp2.mode, "RGBA")
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def test_16bit_monochrome_has_correct_mode(self):
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j2k = Image.open("Tests/images/16bit.cropped.j2k")
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jp2 = Image.open("Tests/images/16bit.cropped.jp2")
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j2k.load()
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jp2.load()
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self.assertEqual(j2k.mode, "I;16")
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self.assertEqual(jp2.mode, "I;16")
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def test_16bit_monochrome_jp2_like_tiff(self):
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tiff_16bit = Image.open("Tests/images/16bit.cropped.tif")
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jp2 = Image.open("Tests/images/16bit.cropped.jp2")
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self.assert_image_similar(jp2, tiff_16bit, 1e-3)
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def test_16bit_monochrome_j2k_like_tiff(self):
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tiff_16bit = Image.open("Tests/images/16bit.cropped.tif")
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j2k = Image.open("Tests/images/16bit.cropped.j2k")
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self.assert_image_similar(j2k, tiff_16bit, 1e-3)
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def test_16bit_j2k_roundtrips(self):
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j2k = Image.open("Tests/images/16bit.cropped.j2k")
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im = self.roundtrip(j2k)
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self.assert_image_equal(im, j2k)
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def test_16bit_jp2_roundtrips(self):
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jp2 = Image.open("Tests/images/16bit.cropped.jp2")
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im = self.roundtrip(jp2)
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self.assert_image_equal(im, jp2)
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def test_unbound_local(self):
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# prepatch, a malformed jp2 file could cause an UnboundLocalError
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# exception.
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with self.assertRaises(IOError):
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Image.open("Tests/images/unbound_variable.jp2")
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def test_parser_feed(self):
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# Arrange
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from PIL import ImageFile
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with open("Tests/images/test-card-lossless.jp2", "rb") as f:
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data = f.read()
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# Act
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p = ImageFile.Parser()
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p.feed(data)
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# Assert
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self.assertEqual(p.image.size, (640, 480))
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