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Drop excess values in BITSPERSAMPLE

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Mikhail Iurkov 2022-02-09 16:16:33 +03:00
parent 8b7c37dc0c
commit bb5a090f60
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3 changed files with 15 additions and 7 deletions
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Tests/images/tiff_wrong_bits_per_sample_2.tiff Normal file
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14
Tests/test_file_tiff.py
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@ -90,11 +90,15 @@ class TestFileTiff:
assert_image_similar_tofile(im, "Tests/images/pil136.png", 1) assert_image_similar_tofile(im, "Tests/images/pil136.png", 1)
def test_wrong_bits_per_sample(self): @pytest.mark.parametrize("file_name,mode,w,h,offset", [
with Image.open("Tests/images/tiff_wrong_bits_per_sample.tiff") as im: ("tiff_wrong_bits_per_sample.tiff","RGBA",52,53,160),
assert im.mode == "RGBA" ("tiff_wrong_bits_per_sample_2.tiff","RGB",16,16,8),
assert im.size == (52, 53) ])
assert im.tile == [("raw", (0, 0, 52, 53), 160, ("RGBA", 0, 1))] def test_wrong_bits_per_sample(self, file_name, mode, w, h, offset):
with Image.open("Tests/images/" + file_name) as im:
assert im.mode == mode
assert im.size == (w, h)
assert im.tile == [("raw", (0, 0, w, h), offset, (mode, 0, 1))]
im.load() im.load()
def test_set_legacy_api(self): def test_set_legacy_api(self):

8
src/PIL/TiffImagePlugin.py
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@ -1308,8 +1308,12 @@ class TiffImageFile(ImageFile.ImageFile):
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, # Some files have only one value in bps_tuple,
# while should have more. Fix it # while should have more. Or have more values
if bps_count > len(bps_tuple) and len(bps_tuple) == 1: # than expected. Fix it
bps_actual_count = len(bps_tuple)
if bps_count < bps_actual_count:
bps_tuple = bps_tuple[:bps_count]
elif bps_count > bps_actual_count and bps_actual_count == 1:
bps_tuple = bps_tuple * bps_count bps_tuple = bps_tuple * bps_count
samplesPerPixel = self.tag_v2.get( samplesPerPixel = self.tag_v2.get(