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Copy palette when converting from P to PA

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This commit is contained in:
Andrew Murray 2022-08-13 17:35:38 +10:00
parent d80e93e435
commit 8a60db322f
2 changed files with 7 additions and 1 deletions
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6
Tests/test_image_convert.py
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@ -236,6 +236,12 @@ def test_p2pa_alpha():
assert im_a.getpixel((x, y)) == alpha assert im_a.getpixel((x, y)) == alpha
def test_p2pa_palette():
with Image.open("Tests/images/tiny.png") as im:
im_pa = im.convert("PA")
assert im_pa.getpalette() == im.getpalette()
def test_matrix_illegal_conversion(): def test_matrix_illegal_conversion():
# Arrange # Arrange
im = hopper("CMYK") im = hopper("CMYK")

2
src/libImaging/Convert.c
View File

@ -1243,7 +1243,7 @@ frompalette(Imaging imOut, Imaging imIn, const char *mode) {
if (!imOut) { if (!imOut) {
return NULL; return NULL;
} }
if (strcmp(mode, "P") == 0) { if (strcmp(mode, "P") == 0 || strcmp(mode, "PA") == 0) {
ImagingPaletteDelete(imOut->palette); ImagingPaletteDelete(imOut->palette);
imOut->palette = ImagingPaletteDuplicate(imIn->palette); imOut->palette = ImagingPaletteDuplicate(imIn->palette);
} }