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Better tests, fixes for leaking RGB->P transparency

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This commit is contained in:
wiredfool 2014-03-26 00:01:10 -07:00
parent 29bb882cef
commit 8adbaf8098
2 changed files with 23 additions and 5 deletions
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13
PIL/Image.py
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@ -769,7 +769,7 @@ class Image:
# after quantization.
trns_im = trns_im.convert('RGB')
trns = trns_im.getpixel((0,0))
if mode == "P" and palette == ADAPTIVE:
im = self.im.quantize(colors)
@ -785,7 +785,7 @@ class Image:
new.info['transparency'] = new.palette.getcolor(trns)
except:
# if we can't make a transparent color, don't leave the old
# transparency hanging around to mess us up.
# transparency hanging around to mess us up.
del(new.info['transparency'])
warnings.warn("Couldn't allocate palette entry for transparency")
return new
@ -809,7 +809,14 @@ class Image:
#crash fail if we leave a bytes transparency in an rgb/l mode.
del(new.info['transparency'])
if trns is not None:
new_im.info['transparency'] = trns
if new_im.mode == 'P':
try:
new_im.info['transparency'] = new_im.palette.getcolor(trns)
except:
del(new_im.info['transparency'])
warnings.warn("Couldn't allocate palette entry for transparency")
else:
new_im.info['transparency'] = trns
return new_im
def quantize(self, colors=256, method=None, kmeans=0, palette=None):

15
Tests/test_image_convert.py
View File

@ -79,10 +79,15 @@ def test_trns_l():
rgb = im.convert('RGB')
assert_equal(rgb.info['transparency'], (128,128,128)) # undone
assert_no_exception(lambda: rgb.save(f))
p = im.convert('P')
assert_true('transparency' in p.info)
assert_no_exception(lambda: p.save(f))
p = im.convert('P', palette = Image.ADAPTIVE)
assert_false('transparency' in p.info)
assert_no_exception(lambda: p.save(f))
def test_trns_RGB():
im = lena('RGB')
@ -93,7 +98,13 @@ def test_trns_RGB():
l = im.convert('L')
assert_equal(l.info['transparency'], l.getpixel((0,0))) # undone
assert_no_exception(lambda: l.save(f))
p = im.convert('P')
assert_true('transparency' in p.info)
assert_no_exception(lambda: p.save(f))
p = im.convert('P', palette = Image.ADAPTIVE)
assert_false('transparency' in p.info)
assert_no_exception(lambda: p.save(f))