Pillow/Tests/test_file_dds.py
2023-09-27 19:41:45 +10:00

336 lines
9.0 KiB
Python

"""Test DdsImagePlugin"""
from io import BytesIO
import pytest
from PIL import DdsImagePlugin, Image
from .helper import assert_image_equal, assert_image_equal_tofile, hopper
TEST_FILE_DXT1 = "Tests/images/dxt1-rgb-4bbp-noalpha_MipMaps-1.dds"
TEST_FILE_DXT3 = "Tests/images/dxt3-argb-8bbp-explicitalpha_MipMaps-1.dds"
TEST_FILE_DXT5 = "Tests/images/dxt5-argb-8bbp-interpolatedalpha_MipMaps-1.dds"
TEST_FILE_ATI1 = "Tests/images/ati1.dds"
TEST_FILE_ATI2 = "Tests/images/ati2.dds"
TEST_FILE_DX10_BC5_TYPELESS = "Tests/images/bc5_typeless.dds"
TEST_FILE_DX10_BC5_UNORM = "Tests/images/bc5_unorm.dds"
TEST_FILE_DX10_BC5_SNORM = "Tests/images/bc5_snorm.dds"
TEST_FILE_BC5S = "Tests/images/bc5s.dds"
TEST_FILE_BC5U = "Tests/images/bc5u.dds"
TEST_FILE_BC6H = "Tests/images/bc6h.dds"
TEST_FILE_BC6HS = "Tests/images/bc6h_sf.dds"
TEST_FILE_DX10_BC7 = "Tests/images/bc7-argb-8bpp_MipMaps-1.dds"
TEST_FILE_DX10_BC7_UNORM_SRGB = "Tests/images/DXGI_FORMAT_BC7_UNORM_SRGB.dds"
TEST_FILE_DX10_R8G8B8A8 = "Tests/images/argb-32bpp_MipMaps-1.dds"
TEST_FILE_DX10_R8G8B8A8_UNORM_SRGB = "Tests/images/DXGI_FORMAT_R8G8B8A8_UNORM_SRGB.dds"
TEST_FILE_UNCOMPRESSED_L = "Tests/images/uncompressed_l.dds"
TEST_FILE_UNCOMPRESSED_L_WITH_ALPHA = "Tests/images/uncompressed_la.dds"
TEST_FILE_UNCOMPRESSED_RGB = "Tests/images/hopper.dds"
TEST_FILE_UNCOMPRESSED_RGB_WITH_ALPHA = "Tests/images/uncompressed_rgb.dds"
def test_sanity_dxt1():
"""Check DXT1 images can be opened"""
with Image.open(TEST_FILE_DXT1.replace(".dds", ".png")) as target:
target = target.convert("RGBA")
with Image.open(TEST_FILE_DXT1) as im:
im.load()
assert im.format == "DDS"
assert im.mode == "RGBA"
assert im.size == (256, 256)
assert_image_equal(im, target)
def test_sanity_dxt3():
"""Check DXT3 images can be opened"""
with Image.open(TEST_FILE_DXT3) as im:
im.load()
assert im.format == "DDS"
assert im.mode == "RGBA"
assert im.size == (256, 256)
assert_image_equal_tofile(im, TEST_FILE_DXT3.replace(".dds", ".png"))
def test_sanity_dxt5():
"""Check DXT5 images can be opened"""
with Image.open(TEST_FILE_DXT5) as im:
im.load()
assert im.format == "DDS"
assert im.mode == "RGBA"
assert im.size == (256, 256)
assert_image_equal_tofile(im, TEST_FILE_DXT5.replace(".dds", ".png"))
def test_sanity_ati1():
"""Check ATI1 images can be opened"""
with Image.open(TEST_FILE_ATI1) as im:
im.load()
assert im.format == "DDS"
assert im.mode == "L"
assert im.size == (64, 64)
assert_image_equal_tofile(im, TEST_FILE_ATI1.replace(".dds", ".png"))
@pytest.mark.parametrize(
"image_path",
(
TEST_FILE_ATI2,
# hexeditted to use BC5U FourCC
TEST_FILE_BC5U,
),
)
def test_sanity_ati2_bc5u(image_path):
"""Check ATI2 and BC5U images can be opened"""
with Image.open(image_path) as im:
im.load()
assert im.format == "DDS"
assert im.mode == "RGB"
assert im.size == (256, 256)
assert_image_equal_tofile(im, TEST_FILE_DX10_BC5_UNORM.replace(".dds", ".png"))
@pytest.mark.parametrize(
("image_path", "expected_path"),
(
# hexeditted to be typeless
(TEST_FILE_DX10_BC5_TYPELESS, TEST_FILE_DX10_BC5_UNORM),
(TEST_FILE_DX10_BC5_UNORM, TEST_FILE_DX10_BC5_UNORM),
# hexeditted to use DX10 FourCC
(TEST_FILE_DX10_BC5_SNORM, TEST_FILE_BC5S),
(TEST_FILE_BC5S, TEST_FILE_BC5S),
),
)
def test_dx10_bc5(image_path, expected_path):
"""Check DX10 BC5 images can be opened"""
with Image.open(image_path) as im:
im.load()
assert im.format == "DDS"
assert im.mode == "RGB"
assert im.size == (256, 256)
assert_image_equal_tofile(im, expected_path.replace(".dds", ".png"))
@pytest.mark.parametrize("image_path", (TEST_FILE_BC6H, TEST_FILE_BC6HS))
def test_dx10_bc6h(image_path):
"""Check DX10 BC6H/BC6HS images can be opened"""
with Image.open(image_path) as im:
im.load()
assert im.format == "DDS"
assert im.mode == "RGB"
assert im.size == (128, 128)
assert_image_equal_tofile(im, image_path.replace(".dds", ".png"))
def test_dx10_bc7():
"""Check DX10 images can be opened"""
with Image.open(TEST_FILE_DX10_BC7) as im:
im.load()
assert im.format == "DDS"
assert im.mode == "RGBA"
assert im.size == (256, 256)
assert_image_equal_tofile(im, TEST_FILE_DX10_BC7.replace(".dds", ".png"))
def test_dx10_bc7_unorm_srgb():
"""Check DX10 unsigned normalized integer images can be opened"""
with Image.open(TEST_FILE_DX10_BC7_UNORM_SRGB) as im:
im.load()
assert im.format == "DDS"
assert im.mode == "RGBA"
assert im.size == (16, 16)
assert im.info["gamma"] == 1 / 2.2
assert_image_equal_tofile(
im, TEST_FILE_DX10_BC7_UNORM_SRGB.replace(".dds", ".png")
)
def test_dx10_r8g8b8a8():
"""Check DX10 images can be opened"""
with Image.open(TEST_FILE_DX10_R8G8B8A8) as im:
im.load()
assert im.format == "DDS"
assert im.mode == "RGBA"
assert im.size == (256, 256)
assert_image_equal_tofile(im, TEST_FILE_DX10_R8G8B8A8.replace(".dds", ".png"))
def test_dx10_r8g8b8a8_unorm_srgb():
"""Check DX10 unsigned normalized integer images can be opened"""
with Image.open(TEST_FILE_DX10_R8G8B8A8_UNORM_SRGB) as im:
im.load()
assert im.format == "DDS"
assert im.mode == "RGBA"
assert im.size == (16, 16)
assert im.info["gamma"] == 1 / 2.2
assert_image_equal_tofile(
im, TEST_FILE_DX10_R8G8B8A8_UNORM_SRGB.replace(".dds", ".png")
)
def test_unimplemented_dxgi_format():
with pytest.raises(NotImplementedError):
with Image.open("Tests/images/unimplemented_dxgi_format.dds"):
pass
@pytest.mark.parametrize(
("mode", "size", "test_file"),
[
("L", (128, 128), TEST_FILE_UNCOMPRESSED_L),
("LA", (128, 128), TEST_FILE_UNCOMPRESSED_L_WITH_ALPHA),
("RGB", (128, 128), TEST_FILE_UNCOMPRESSED_RGB),
("RGBA", (800, 600), TEST_FILE_UNCOMPRESSED_RGB_WITH_ALPHA),
],
)
def test_uncompressed(mode, size, test_file):
"""Check uncompressed images can be opened"""
with Image.open(test_file) as im:
assert im.format == "DDS"
assert im.mode == mode
assert im.size == size
assert_image_equal_tofile(im, test_file.replace(".dds", ".png"))
def test__accept_true():
"""Check valid prefix"""
# Arrange
prefix = b"DDS etc"
# Act
output = DdsImagePlugin._accept(prefix)
# Assert
assert output
def test__accept_false():
"""Check invalid prefix"""
# Arrange
prefix = b"something invalid"
# Act
output = DdsImagePlugin._accept(prefix)
# Assert
assert not output
def test_invalid_file():
invalid_file = "Tests/images/flower.jpg"
with pytest.raises(SyntaxError):
DdsImagePlugin.DdsImageFile(invalid_file)
def test_short_header():
"""Check a short header"""
with open(TEST_FILE_DXT5, "rb") as f:
img_file = f.read()
def short_header():
with Image.open(BytesIO(img_file[:119])):
pass # pragma: no cover
with pytest.raises(OSError):
short_header()
def test_short_file():
"""Check that the appropriate error is thrown for a short file"""
with open(TEST_FILE_DXT5, "rb") as f:
img_file = f.read()
def short_file():
with Image.open(BytesIO(img_file[:-100])) as im:
im.load()
with pytest.raises(OSError):
short_file()
def test_dxt5_colorblock_alpha_issue_4142():
"""Check that colorblocks are decoded correctly in DXT5"""
with Image.open("Tests/images/dxt5-colorblock-alpha-issue-4142.dds") as im:
px = im.getpixel((0, 0))
assert px[0] != 0
assert px[1] != 0
assert px[2] != 0
px = im.getpixel((1, 0))
assert px[0] != 0
assert px[1] != 0
assert px[2] != 0
def test_palette():
with Image.open("Tests/images/palette.dds") as im:
assert_image_equal_tofile(im, "Tests/images/transparent.gif")
def test_unimplemented_pixel_format():
with pytest.raises(NotImplementedError):
with Image.open("Tests/images/unimplemented_pixel_format.dds"):
pass
def test_save_unsupported_mode(tmp_path):
out = str(tmp_path / "temp.dds")
im = hopper("HSV")
with pytest.raises(OSError):
im.save(out)
@pytest.mark.parametrize(
("mode", "test_file"),
[
("L", "Tests/images/linear_gradient.png"),
("LA", "Tests/images/uncompressed_la.png"),
("RGB", "Tests/images/hopper.png"),
("RGBA", "Tests/images/pil123rgba.png"),
],
)
def test_save(mode, test_file, tmp_path):
out = str(tmp_path / "temp.dds")
with Image.open(test_file) as im:
assert im.mode == mode
im.save(out)
with Image.open(out) as reloaded:
assert_image_equal(im, reloaded)