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Added ABGR BMP mask mode #6436

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merged 3 commits into from Jul 15, 2022
Merged

Added ABGR BMP mask mode #6436

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2b9d484
Reordered SUPPORTED to match MASK_MODES
radarhere Jul 13, 2022
9f6a315
Added ABGR MASK_MODE
radarhere Jul 13, 2022
ea78975
Merge branch 'main' into bmp
radarhere Jul 15, 2022
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Binary file added Tests/images/rgb32bf-abgr.bmp
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7 changes: 7 additions & 0 deletions Tests/test_file_bmp.py
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Expand Up @@ -129,6 +129,13 @@ def test_rgba_bitfields():

assert_image_equal_tofile(im, "Tests/images/bmp/q/rgb32bf-xbgr.bmp")

# This test image has been manually hexedited
# to change the bitfield compression in the header from XBGR to ABGR
with Image.open("Tests/images/rgb32bf-abgr.bmp") as im:
assert_image_equal_tofile(
im.convert("RGB"), "Tests/images/bmp/q/rgb32bf-xbgr.bmp"
)


def test_rle8():
with Image.open("Tests/images/hopper_rle8.bmp") as im:
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6 changes: 4 additions & 2 deletions src/PIL/BmpImagePlugin.py
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Expand Up @@ -172,17 +172,19 @@ def _bitmap(self, header=0, offset=0):
SUPPORTED = {
32: [
(0xFF0000, 0xFF00, 0xFF, 0x0),
(0xFF0000, 0xFF00, 0xFF, 0xFF000000),
(0xFF000000, 0xFF0000, 0xFF00, 0x0),
(0xFF000000, 0xFF0000, 0xFF00, 0xFF),
(0xFF, 0xFF00, 0xFF0000, 0xFF000000),
(0xFF0000, 0xFF00, 0xFF, 0xFF000000),
(0x0, 0x0, 0x0, 0x0),
(0xFF000000, 0xFF0000, 0xFF00, 0x0),
],
24: [(0xFF0000, 0xFF00, 0xFF)],
16: [(0xF800, 0x7E0, 0x1F), (0x7C00, 0x3E0, 0x1F)],
}
MASK_MODES = {
(32, (0xFF0000, 0xFF00, 0xFF, 0x0)): "BGRX",
(32, (0xFF000000, 0xFF0000, 0xFF00, 0x0)): "XBGR",
(32, (0xFF000000, 0xFF0000, 0xFF00, 0xFF)): "ABGR",
(32, (0xFF, 0xFF00, 0xFF0000, 0xFF000000)): "RGBA",
(32, (0xFF0000, 0xFF00, 0xFF, 0xFF000000)): "BGRA",
(32, (0x0, 0x0, 0x0, 0x0)): "BGRA",
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