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raise SyntaxError when parsing codestream rather than returning an empty string

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Co-authored-by: Andrew Murray <3112309+radarhere@users.noreply.github.com>
This commit is contained in:
Yay295 2024-06-17 09:29:14 -05:00 committed by Yay295
parent a596a4063d
commit 58d5a73fac
1 changed files with 3 additions and 6 deletions
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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