import os import re from io import BytesIO import pytest from PIL import Image, ImageFile, Jpeg2KImagePlugin, UnidentifiedImageError, features from .helper import ( assert_image_equal, assert_image_similar, assert_image_similar_tofile, is_big_endian, skip_unless_feature, ) EXTRA_DIR = "Tests/images/jpeg2000" pytestmark = skip_unless_feature("jpg_2000") 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' def roundtrip(im, **options): out = BytesIO() im.save(out, "JPEG2000", **options) test_bytes = out.tell() out.seek(0) with Image.open(out) as im: im.bytes = test_bytes # for testing only im.load() return im def test_sanity(): # Internal version number assert re.search(r"\d+\.\d+\.\d+$", features.version_codec("jpg_2000")) with Image.open("Tests/images/test-card-lossless.jp2") as im: px = im.load() assert px[0, 0] == (0, 0, 0) assert im.mode == "RGB" assert im.size == (640, 480) assert im.format == "JPEG2000" assert im.get_format_mimetype() == "image/jp2" def test_jpf(): with Image.open("Tests/images/balloon.jpf") as im: assert im.format == "JPEG2000" assert im.get_format_mimetype() == "image/jpx" def test_invalid_file(): invalid_file = "Tests/images/flower.jpg" with pytest.raises(SyntaxError): Jpeg2KImagePlugin.Jpeg2KImageFile(invalid_file) def test_bytesio(): with open("Tests/images/test-card-lossless.jp2", "rb") as f: data = BytesIO(f.read()) assert_image_similar_tofile(test_card, data, 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(tmp_path): with Image.open("Tests/images/test-card-lossless.jp2") as im: im.load() outfile = str(tmp_path / "temp_test-card.png") im.save(outfile) assert_image_similar(im, test_card, 1.0e-3) def test_lossy_tiled(): assert_image_similar_tofile( test_card, "Tests/images/test-card-lossy-tiled.jp2", 2.0 ) def test_lossless_rt(): im = roundtrip(test_card) assert_image_equal(im, test_card) def test_lossy_rt(): im = roundtrip(test_card, quality_layers=[20]) assert_image_similar(im, test_card, 2.0) def test_tiled_rt(): im = roundtrip(test_card, tile_size=(128, 128)) assert_image_equal(im, test_card) def test_tiled_offset_rt(): im = roundtrip(test_card, tile_size=(128, 128), tile_offset=(0, 0), offset=(32, 32)) assert_image_equal(im, test_card) def test_tiled_offset_too_small(): with pytest.raises(ValueError): roundtrip(test_card, tile_size=(128, 128), tile_offset=(0, 0), offset=(128, 32)) def test_irreversible_rt(): im = roundtrip(test_card, irreversible=True, quality_layers=[20]) assert_image_similar(im, test_card, 2.0) def test_prog_qual_rt(): im = roundtrip(test_card, quality_layers=[60, 40, 20], progression="LRCP") assert_image_similar(im, test_card, 2.0) def test_prog_res_rt(): im = roundtrip(test_card, num_resolutions=8, progression="RLCP") assert_image_equal(im, test_card) def test_default_num_resolutions(): for num_resolutions in range(2, 6): d = 1 << (num_resolutions - 1) im = test_card.resize((d - 1, d - 1)) with pytest.raises(OSError): roundtrip(im, num_resolutions=num_resolutions) reloaded = roundtrip(im) assert_image_equal(im, reloaded) def test_reduce(): with Image.open("Tests/images/test-card-lossless.jp2") as im: assert callable(im.reduce) im.reduce = 2 assert im.reduce == 2 im.load() assert im.size == (160, 120) im.thumbnail((40, 40)) assert im.size == (40, 30) def test_load_dpi(): with Image.open("Tests/images/test-card-lossless.jp2") as im: assert im.info["dpi"] == (71.9836, 71.9836) with Image.open("Tests/images/zero_dpi.jp2") as im: assert "dpi" not in im.info def test_restricted_icc_profile(): ImageFile.LOAD_TRUNCATED_IMAGES = True try: # JPEG2000 image with a restricted ICC profile and a known colorspace with Image.open("Tests/images/balloon_eciRGBv2_aware.jp2") as im: assert im.mode == "RGB" finally: ImageFile.LOAD_TRUNCATED_IMAGES = False def test_header_errors(): for path in ( "Tests/images/invalid_header_length.jp2", "Tests/images/not_enough_data.jp2", ): with pytest.raises(UnidentifiedImageError): with Image.open(path): pass with pytest.raises(OSError): with Image.open("Tests/images/expected_to_read.jp2"): pass def test_layers_type(tmp_path): outfile = str(tmp_path / "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")]: with pytest.raises(ValueError): test_card.save(outfile, quality_layers=quality_layers) def test_layers(): out = BytesIO() test_card.save(out, "JPEG2000", quality_layers=[100, 50, 10], progression="LRCP") out.seek(0) with Image.open(out) as im: im.layers = 1 im.load() assert_image_similar(im, test_card, 13) out.seek(0) with Image.open(out) as im: im.layers = 3 im.load() assert_image_similar(im, test_card, 0.4) def test_rgba(): # Arrange with Image.open("Tests/images/rgb_trns_ycbc.j2k") as j2k: with Image.open("Tests/images/rgb_trns_ycbc.jp2") as jp2: # Act j2k.load() jp2.load() # Assert assert j2k.mode == "RGBA" assert jp2.mode == "RGBA" def test_16bit_monochrome_has_correct_mode(): with Image.open("Tests/images/16bit.cropped.j2k") as j2k: j2k.load() assert j2k.mode == "I;16" with Image.open("Tests/images/16bit.cropped.jp2") as jp2: jp2.load() assert jp2.mode == "I;16" @pytest.mark.xfail(is_big_endian(), reason="Fails on big-endian") def test_16bit_monochrome_jp2_like_tiff(): with Image.open("Tests/images/16bit.cropped.tif") as tiff_16bit: assert_image_similar_tofile(tiff_16bit, "Tests/images/16bit.cropped.jp2", 1e-3) @pytest.mark.xfail(is_big_endian(), reason="Fails on big-endian") def test_16bit_monochrome_j2k_like_tiff(): with Image.open("Tests/images/16bit.cropped.tif") as tiff_16bit: assert_image_similar_tofile(tiff_16bit, "Tests/images/16bit.cropped.j2k", 1e-3) def test_16bit_j2k_roundtrips(): with Image.open("Tests/images/16bit.cropped.j2k") as j2k: im = roundtrip(j2k) assert_image_equal(im, j2k) def test_16bit_jp2_roundtrips(): with Image.open("Tests/images/16bit.cropped.jp2") as jp2: im = roundtrip(jp2) assert_image_equal(im, jp2) def test_unbound_local(): # prepatch, a malformed jp2 file could cause an UnboundLocalError exception. with pytest.raises(OSError): with Image.open("Tests/images/unbound_variable.jp2"): pass def test_parser_feed(): # Arrange with open("Tests/images/test-card-lossless.jp2", "rb") as f: data = f.read() # Act p = ImageFile.Parser() p.feed(data) # Assert assert p.image.size == (640, 480) @pytest.mark.skipif( not os.path.exists(EXTRA_DIR), reason="Extra image files not installed" ) @pytest.mark.parametrize("name", ("subsampling_1", "subsampling_2", "zoo1", "zoo2")) def test_subsampling_decode(name): test = f"{EXTRA_DIR}/{name}.jp2" reference = f"{EXTRA_DIR}/{name}.ppm" with Image.open(test) as im: epsilon = 3 # for YCbCr images with Image.open(reference) as im2: width, height = im2.size if name[-1] == "2": # RGB reference images are downscaled epsilon = 3e-3 width, height = width * 2, height * 2 expected = im2.resize((width, height), Image.NEAREST) assert_image_similar(im, expected, epsilon) @pytest.mark.parametrize( "test_file", [ "Tests/images/crash-4fb027452e6988530aa5dabee76eecacb3b79f8a.j2k", "Tests/images/crash-7d4c83eb92150fb8f1653a697703ae06ae7c4998.j2k", "Tests/images/crash-ccca68ff40171fdae983d924e127a721cab2bd50.j2k", "Tests/images/crash-d2c93af851d3ab9a19e34503626368b2ecde9c03.j2k", ], ) def test_crashes(test_file): with open(test_file, "rb") as f: with Image.open(f) as im: # Valgrind should not complain here try: im.load() except OSError: pass