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Match mask size to pasted image size

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This commit is contained in:
Andrew Murray 2024-02-05 19:16:15 +11:00
parent 1b67239674
commit dfb48ff297
2 changed files with 16 additions and 3 deletions
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15
Tests/test_file_gif.py
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@ -1105,6 +1105,21 @@ def test_append_images(tmp_path: Path) -> None:
assert reread.n_frames == 10
def test_append_different_size_image(tmp_path: Path) -> None:
out = str(tmp_path / "temp.gif")
im = Image.new("RGB", (100, 100))
bigger_im = Image.new("RGB", (200, 200), "#f00")
im.save(out, save_all=True, append_images=[bigger_im])
with Image.open(out) as reread:
assert reread.size == (100, 100)
reread.seek(1)
assert reread.size == (100, 100)
def test_transparent_optimize(tmp_path: Path) -> None:
# From issue #2195, if the transparent color is incorrectly optimized out, GIF loses
# transparency.

4
src/PIL/GifImagePlugin.py
View File

@ -649,9 +649,7 @@ def _write_multiple_frames(im, fp, palette):
if "transparency" in encoderinfo:
# When the delta is zero, fill the image with transparency
diff_frame = im_frame.copy()
fill = Image.new(
"P", diff_frame.size, encoderinfo["transparency"]
)
fill = Image.new("P", delta.size, encoderinfo["transparency"])
if delta.mode == "RGBA":
r, g, b, a = delta.split()
mask = ImageMath.eval(