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Merge pull request #8146 from Yay295/jp2_parsing

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Hugo van Kemenade 2024-06-26 11:32:57 +03:00 committed by GitHub
commit 2756cd5273
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3 changed files with 9 additions and 6 deletions
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Tests/images/unknown_mode.j2k Normal file
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6
Tests/test_file_jpeg2k.py
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@ -335,6 +335,12 @@ def test_issue_6194() -> None:
assert im.getpixel((5, 5)) == 31
def test_unknown_j2k_mode() -> None:
with pytest.raises(UnidentifiedImageError):
with Image.open("Tests/images/unknown_mode.j2k"):
pass
def test_unbound_local() -> None:
# prepatch, a malformed jp2 file could cause an UnboundLocalError exception.
with pytest.raises(UnidentifiedImageError):

9
src/PIL/Jpeg2KImagePlugin.py
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@ -97,7 +97,7 @@ class BoxReader:
return tbox
def _parse_codestream(fp):
def _parse_codestream(fp) -> tuple[tuple[int, int], str]:
"""Parse the JPEG 2000 codestream to extract the size and component
count from the SIZ marker segment, returning a PIL (size, mode) tuple."""
@ -122,7 +122,8 @@ def _parse_codestream(fp):
elif csiz == 4:
mode = "RGBA"
else:
mode = ""
msg = "unable to determine J2K image mode"
raise SyntaxError(msg)
return size, mode
@ -237,10 +238,6 @@ class Jpeg2KImageFile(ImageFile.ImageFile):
msg = "not a JPEG 2000 file"
raise SyntaxError(msg)
if self.size is None or not self.mode:
msg = "unable to determine size/mode"
raise SyntaxError(msg)
self._reduce = 0
self.layers = 0