Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Added support for reading DX10 BC4 DDS images #7603

Merged
merged 4 commits into from
Dec 5, 2023
Merged
Show file tree
Hide file tree
Changes from all commits
Commits
File filter

Filter by extension

Filter by extension

Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
Binary file added Tests/images/bc4_typeless.dds
Binary file not shown.
Binary file added Tests/images/bc4_unorm.dds
Binary file not shown.
Binary file added Tests/images/bc4_unorm.png
Loading
Sorry, something went wrong. Reload?
Sorry, we cannot display this file.
Sorry, this file is invalid so it cannot be displayed.
23 changes: 23 additions & 0 deletions Tests/test_file_dds.py
Original file line number Diff line number Diff line change
Expand Up @@ -12,6 +12,8 @@
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_BC4_TYPELESS = "Tests/images/bc4_typeless.dds"
TEST_FILE_DX10_BC4_UNORM = "Tests/images/bc4_unorm.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"
Expand Down Expand Up @@ -82,6 +84,27 @@ def test_sanity_ati1():
assert_image_equal_tofile(im, TEST_FILE_ATI1.replace(".dds", ".png"))


@pytest.mark.parametrize(
"image_path",
(
TEST_FILE_DX10_BC4_UNORM,
# hexeditted to be typeless
TEST_FILE_DX10_BC4_TYPELESS,
),
)
def test_dx10_bc4(image_path):
"""Check DX10 BC4 images can be opened"""

with Image.open(image_path) as im:
im.load()

assert im.format == "DDS"
assert im.mode == "L"
assert im.size == (64, 64)

assert_image_equal_tofile(im, TEST_FILE_DX10_BC4_UNORM.replace(".dds", ".png"))


@pytest.mark.parametrize(
"image_path",
(
Expand Down
8 changes: 7 additions & 1 deletion src/PIL/DdsImagePlugin.py
Original file line number Diff line number Diff line change
Expand Up @@ -98,6 +98,8 @@
DXGI_FORMAT_R8G8B8A8_TYPELESS = 27
DXGI_FORMAT_R8G8B8A8_UNORM = 28
DXGI_FORMAT_R8G8B8A8_UNORM_SRGB = 29
DXGI_FORMAT_BC4_TYPELESS = 79
DXGI_FORMAT_BC4_UNORM = 80

Check warning on line 102 in src/PIL/DdsImagePlugin.py

View check run for this annotation

Codecov / codecov/patch

src/PIL/DdsImagePlugin.py#L101-L102

Added lines #L101 - L102 were not covered by tests
Copy link
Member

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

A note that you may or may not care about - I'm hoping to get #6486 merged before the next release. If it is merged in time, then I would remove these new constants in favour of enums. You've absolutely done the right thing here, no need to change this PR, just letting you know that if you had plans to use these constants externally, things may not play out that way.

Copy link
Member

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

#6486 has now been merged

DXGI_FORMAT_BC5_TYPELESS = 82
DXGI_FORMAT_BC5_UNORM = 83
DXGI_FORMAT_BC5_SNORM = 84
Expand Down Expand Up @@ -190,7 +192,11 @@
# ignoring flags which pertain to volume textures and cubemaps
(dxgi_format,) = struct.unpack("<I", self.fp.read(4))
self.fp.read(16)
if dxgi_format in (DXGI_FORMAT_BC5_TYPELESS, DXGI_FORMAT_BC5_UNORM):
if dxgi_format in (DXGI_FORMAT_BC4_TYPELESS, DXGI_FORMAT_BC4_UNORM):
self.pixel_format = "BC4"
n = 4
self._mode = "L"
elif dxgi_format in (DXGI_FORMAT_BC5_TYPELESS, DXGI_FORMAT_BC5_UNORM):

Check warning on line 199 in src/PIL/DdsImagePlugin.py

View check run for this annotation

Codecov / codecov/patch

src/PIL/DdsImagePlugin.py#L195-L199

Added lines #L195 - L199 were not covered by tests
self.pixel_format = "BC5"
n = 5
self._mode = "RGB"
Expand Down