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Force reloading palette when using mmap in ImageFile.

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This commit is contained in:
Marcus Brinkmann 2016-09-29 14:54:25 +02:00
parent 0a0fe292ec
commit c74e45e87c
3 changed files with 12 additions and 0 deletions
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3
PIL/ImageFile.py
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@ -170,6 +170,9 @@ class ImageFile(Image.Image):
self.map, self.size, d, e, o, a
)
readonly = 1
# After trashing self.im, we might need to reload the palette data.
if self.palette:
self.palette.dirty = 1
except (AttributeError, EnvironmentError, ImportError):
self.map = None

BIN
Tests/images/multipage-mmap.tiff Normal file
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Binary file not shown.

9
Tests/test_imagesequence.py
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@ -63,5 +63,14 @@ class TestImageSequence(PillowTestCase):
self.assert_image_equal(frame, firstFrame)
break
def test_palette_mmap(self):
# Using mmap in ImageFile can require to reload the palette.
im = Image.open('Tests/images/multipage-mmap.tiff')
color1 = im.getpalette()[0:3]
im.seek(0)
color2 = im.getpalette()[0:3]
self.assertEqual(color1, color2)
if __name__ == '__main__':
unittest.main()