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Set color table fourth channel to zero for 1 and L mode when saving BMP (#8889)

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Hugo van Kemenade 2025-06-27 18:00:06 +03:00 committed by GitHub
commit ba37249ab7
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1 changed files with 2 additions and 2 deletions
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src/PIL/BmpImagePlugin.py
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@ -445,9 +445,9 @@ def _save(
image = stride * im.size[1]
if im.mode == "1":
palette = b"".join(o8(i) * 4 for i in (0, 255))
palette = b"".join(o8(i) * 3 + b"\x00" for i in (0, 255))
elif im.mode == "L":
palette = b"".join(o8(i) * 4 for i in range(256))
palette = b"".join(o8(i) * 3 + b"\x00" for i in range(256))
elif im.mode == "P":
palette = im.im.getpalette("RGB", "BGRX")
colors = len(palette) // 4