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Merge pull request #6042 from radarhere/tiff_bits

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Clarify code and comments
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mergify[bot] 2022-02-10 21:20:22 +00:00 committed by GitHub
commit 89768e3d57
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2 changed files with 10 additions and 9 deletions
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12
Tests/test_file_tiff.py
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@ -91,17 +91,17 @@ class TestFileTiff:
assert_image_similar_tofile(im, "Tests/images/pil136.png", 1) assert_image_similar_tofile(im, "Tests/images/pil136.png", 1)
@pytest.mark.parametrize( @pytest.mark.parametrize(
"file_name,mode,w,h,offset", "file_name,mode,size,offset",
[ [
("tiff_wrong_bits_per_sample.tiff", "RGBA", 52, 53, 160), ("tiff_wrong_bits_per_sample.tiff", "RGBA", (52, 53), 160),
("tiff_wrong_bits_per_sample_2.tiff", "RGB", 16, 16, 8), ("tiff_wrong_bits_per_sample_2.tiff", "RGB", (16, 16), 8),
], ],
) )
def test_wrong_bits_per_sample(self, file_name, mode, w, h, offset): def test_wrong_bits_per_sample(self, file_name, mode, size, offset):
with Image.open("Tests/images/" + file_name) as im: with Image.open("Tests/images/" + file_name) as im:
assert im.mode == mode assert im.mode == mode
assert im.size == (w, h) assert im.size == size
assert im.tile == [("raw", (0, 0, w, h), offset, (mode, 0, 1))] assert im.tile == [("raw", (0, 0) + size, offset, (mode, 0, 1))]
im.load() im.load()
def test_set_legacy_api(self): def test_set_legacy_api(self):

7
src/PIL/TiffImagePlugin.py
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@ -1332,13 +1332,14 @@ class TiffImageFile(ImageFile.ImageFile):
else: else:
bps_count = 1 bps_count = 1
bps_count += len(extra_tuple) bps_count += len(extra_tuple)
# Some files have only one value in bps_tuple,
# while should have more. Or have more values
# than expected. Fix it
bps_actual_count = len(bps_tuple) bps_actual_count = len(bps_tuple)
if bps_count < bps_actual_count: if bps_count < bps_actual_count:
# If a file has more values in bps_tuple than expected,
# remove the excess.
bps_tuple = bps_tuple[:bps_count] bps_tuple = bps_tuple[:bps_count]
elif bps_count > bps_actual_count and bps_actual_count == 1: elif bps_count > bps_actual_count and bps_actual_count == 1:
# If a file has only one value in bps_tuple, when it should have more,
# presume it is the same number of bits for all of the samples.
bps_tuple = bps_tuple * bps_count bps_tuple = bps_tuple * bps_count
samplesPerPixel = self.tag_v2.get( samplesPerPixel = self.tag_v2.get(