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292 lines
7.8 KiB
Python
292 lines
7.8 KiB
Python
"""Test DdsImagePlugin"""
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from io import BytesIO
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import pytest
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from PIL import DdsImagePlugin, Image
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from .helper import assert_image_equal, assert_image_equal_tofile, hopper
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TEST_FILE_DXT1 = "Tests/images/dxt1-rgb-4bbp-noalpha_MipMaps-1.dds"
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TEST_FILE_DXT3 = "Tests/images/dxt3-argb-8bbp-explicitalpha_MipMaps-1.dds"
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TEST_FILE_DXT5 = "Tests/images/dxt5-argb-8bbp-interpolatedalpha_MipMaps-1.dds"
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TEST_FILE_DX10_BC5_TYPELESS = "Tests/images/bc5_typeless.dds"
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TEST_FILE_DX10_BC5_UNORM = "Tests/images/bc5_unorm.dds"
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TEST_FILE_DX10_BC5_SNORM = "Tests/images/bc5_snorm.dds"
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TEST_FILE_BC5S = "Tests/images/bc5s.dds"
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TEST_FILE_BC6H = "Tests/images/bc6h.dds"
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TEST_FILE_BC6HS = "Tests/images/bc6h_sf.dds"
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TEST_FILE_DX10_BC7 = "Tests/images/bc7-argb-8bpp_MipMaps-1.dds"
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TEST_FILE_DX10_BC7_UNORM_SRGB = "Tests/images/DXGI_FORMAT_BC7_UNORM_SRGB.dds"
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TEST_FILE_DX10_R8G8B8A8 = "Tests/images/argb-32bpp_MipMaps-1.dds"
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TEST_FILE_DX10_R8G8B8A8_UNORM_SRGB = "Tests/images/DXGI_FORMAT_R8G8B8A8_UNORM_SRGB.dds"
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TEST_FILE_UNCOMPRESSED_RGB = "Tests/images/hopper.dds"
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TEST_FILE_UNCOMPRESSED_RGB_WITH_ALPHA = "Tests/images/uncompressed_rgb.dds"
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def test_sanity_dxt1():
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"""Check DXT1 images can be opened"""
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with Image.open(TEST_FILE_DXT1.replace(".dds", ".png")) as target:
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target = target.convert("RGBA")
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with Image.open(TEST_FILE_DXT1) as im:
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im.load()
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assert im.format == "DDS"
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assert im.mode == "RGBA"
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assert im.size == (256, 256)
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assert_image_equal(im, target)
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def test_sanity_dxt3():
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"""Check DXT3 images can be opened"""
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with Image.open(TEST_FILE_DXT3) as im:
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im.load()
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assert im.format == "DDS"
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assert im.mode == "RGBA"
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assert im.size == (256, 256)
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assert_image_equal_tofile(im, TEST_FILE_DXT3.replace(".dds", ".png"))
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def test_sanity_dxt5():
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"""Check DXT5 images can be opened"""
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with Image.open(TEST_FILE_DXT5) as im:
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im.load()
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assert im.format == "DDS"
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assert im.mode == "RGBA"
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assert im.size == (256, 256)
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assert_image_equal_tofile(im, TEST_FILE_DXT5.replace(".dds", ".png"))
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@pytest.mark.parametrize(
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("image_path", "expected_path"),
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(
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# hexeditted to be typeless
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(TEST_FILE_DX10_BC5_TYPELESS, TEST_FILE_DX10_BC5_UNORM),
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(TEST_FILE_DX10_BC5_UNORM, TEST_FILE_DX10_BC5_UNORM),
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# hexeditted to use DX10 FourCC
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(TEST_FILE_DX10_BC5_SNORM, TEST_FILE_BC5S),
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(TEST_FILE_BC5S, TEST_FILE_BC5S),
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),
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)
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def test_dx10_bc5(image_path, expected_path):
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"""Check DX10 BC5 images can be opened"""
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with Image.open(image_path) as im:
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im.load()
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assert im.format == "DDS"
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assert im.mode == "RGB"
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assert im.size == (256, 256)
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assert_image_equal_tofile(im, expected_path.replace(".dds", ".png"))
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@pytest.mark.parametrize("image_path", (TEST_FILE_BC6H, TEST_FILE_BC6HS))
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def test_dx10_bc6h(image_path):
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"""Check DX10 BC6H/BC6HS images can be opened"""
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with Image.open(image_path) as im:
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im.load()
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assert im.format == "DDS"
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assert im.mode == "RGB"
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assert im.size == (256, 256)
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assert_image_equal_tofile(im, image_path.replace(".dds", ".png"))
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def test_dx10_bc7():
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"""Check DX10 images can be opened"""
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with Image.open(TEST_FILE_DX10_BC7) as im:
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im.load()
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assert im.format == "DDS"
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assert im.mode == "RGBA"
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assert im.size == (256, 256)
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assert_image_equal_tofile(im, TEST_FILE_DX10_BC7.replace(".dds", ".png"))
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def test_dx10_bc7_unorm_srgb():
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"""Check DX10 unsigned normalized integer images can be opened"""
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with Image.open(TEST_FILE_DX10_BC7_UNORM_SRGB) as im:
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im.load()
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assert im.format == "DDS"
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assert im.mode == "RGBA"
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assert im.size == (16, 16)
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assert im.info["gamma"] == 1 / 2.2
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assert_image_equal_tofile(
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im, TEST_FILE_DX10_BC7_UNORM_SRGB.replace(".dds", ".png")
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)
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def test_dx10_r8g8b8a8():
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"""Check DX10 images can be opened"""
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with Image.open(TEST_FILE_DX10_R8G8B8A8) as im:
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im.load()
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assert im.format == "DDS"
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assert im.mode == "RGBA"
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assert im.size == (256, 256)
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assert_image_equal_tofile(im, TEST_FILE_DX10_R8G8B8A8.replace(".dds", ".png"))
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def test_dx10_r8g8b8a8_unorm_srgb():
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"""Check DX10 unsigned normalized integer images can be opened"""
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with Image.open(TEST_FILE_DX10_R8G8B8A8_UNORM_SRGB) as im:
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im.load()
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assert im.format == "DDS"
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assert im.mode == "RGBA"
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assert im.size == (16, 16)
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assert im.info["gamma"] == 1 / 2.2
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assert_image_equal_tofile(
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im, TEST_FILE_DX10_R8G8B8A8_UNORM_SRGB.replace(".dds", ".png")
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)
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def test_unimplemented_dxgi_format():
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with pytest.raises(NotImplementedError):
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with Image.open("Tests/images/unimplemented_dxgi_format.dds"):
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pass
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def test_uncompressed_rgb():
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"""Check uncompressed RGB images can be opened"""
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# convert -format dds -define dds:compression=none hopper.jpg hopper.dds
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with Image.open(TEST_FILE_UNCOMPRESSED_RGB) as im:
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assert im.format == "DDS"
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assert im.mode == "RGB"
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assert im.size == (128, 128)
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assert_image_equal_tofile(im, "Tests/images/hopper.png")
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# Test image with alpha
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with Image.open(TEST_FILE_UNCOMPRESSED_RGB_WITH_ALPHA) as im:
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assert im.format == "DDS"
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assert im.mode == "RGBA"
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assert im.size == (800, 600)
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assert_image_equal_tofile(
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im, TEST_FILE_UNCOMPRESSED_RGB_WITH_ALPHA.replace(".dds", ".png")
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)
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def test__accept_true():
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"""Check valid prefix"""
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# Arrange
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prefix = b"DDS etc"
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# Act
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output = DdsImagePlugin._accept(prefix)
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# Assert
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assert output
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def test__accept_false():
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"""Check invalid prefix"""
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# Arrange
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prefix = b"something invalid"
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# Act
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output = DdsImagePlugin._accept(prefix)
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# Assert
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assert not output
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def test_invalid_file():
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invalid_file = "Tests/images/flower.jpg"
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with pytest.raises(SyntaxError):
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DdsImagePlugin.DdsImageFile(invalid_file)
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def test_short_header():
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"""Check a short header"""
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with open(TEST_FILE_DXT5, "rb") as f:
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img_file = f.read()
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def short_header():
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with Image.open(BytesIO(img_file[:119])):
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pass # pragma: no cover
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with pytest.raises(OSError):
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short_header()
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def test_short_file():
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"""Check that the appropriate error is thrown for a short file"""
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with open(TEST_FILE_DXT5, "rb") as f:
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img_file = f.read()
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def short_file():
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with Image.open(BytesIO(img_file[:-100])) as im:
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im.load()
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with pytest.raises(OSError):
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short_file()
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def test_dxt5_colorblock_alpha_issue_4142():
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"""Check that colorblocks are decoded correctly in DXT5"""
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with Image.open("Tests/images/dxt5-colorblock-alpha-issue-4142.dds") as im:
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px = im.getpixel((0, 0))
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assert px[0] != 0
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assert px[1] != 0
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assert px[2] != 0
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px = im.getpixel((1, 0))
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assert px[0] != 0
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assert px[1] != 0
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assert px[2] != 0
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def test_unimplemented_pixel_format():
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with pytest.raises(NotImplementedError):
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with Image.open("Tests/images/unimplemented_pixel_format.dds"):
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pass
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def test_save_unsupported_mode(tmp_path):
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out = str(tmp_path / "temp.dds")
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im = hopper("HSV")
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with pytest.raises(OSError):
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im.save(out)
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@pytest.mark.parametrize(
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("mode", "test_file"),
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[
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("RGB", "Tests/images/hopper.png"),
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("RGBA", "Tests/images/pil123rgba.png"),
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],
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)
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def test_save(mode, test_file, tmp_path):
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out = str(tmp_path / "temp.dds")
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with Image.open(test_file) as im:
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assert im.mode == mode
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im.save(out)
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with Image.open(out) as reloaded:
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assert_image_equal(im, reloaded)
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