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Merge pull request #6096 from radarhere/cleanup

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Hugo van Kemenade 2022-03-06 20:12:13 +02:00 committed by GitHub
commit c16737d589
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2 changed files with 30 additions and 32 deletions
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5
Tests/test_imagefile.py
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@ -200,6 +200,9 @@ class MockPyEncoder(ImageFile.PyEncoder):
def encode(self, buffer):
return 1, 1, b""
def cleanup(self):
self.cleanup_called = True
xoff, yoff, xsize, ysize = 10, 20, 100, 100
@ -327,10 +330,12 @@ class TestPyEncoder(CodecsTest):
im = MockImageFile(buf)
fp = BytesIO()
self.encoder.cleanup_called = False
with pytest.raises(ValueError):
ImageFile._save(
im, fp, [("MOCK", (xoff, yoff, -10, yoff + ysize), 0, "RGB")]
)
assert self.encoder.cleanup_called
with pytest.raises(ValueError):
ImageFile._save(

57
src/PIL/ImageFile.py
View File

@ -223,11 +223,11 @@ class ImageFile(Image.Image):
)
]
for decoder_name, extents, offset, args in self.tile:
seek(offset)
decoder = Image._getdecoder(
self.mode, decoder_name, args, self.decoderconfig
)
try:
seek(offset)
decoder.setimage(self.im, extents)
if decoder.pulls_fd:
decoder.setfd(self.fp)
@ -499,40 +499,33 @@ def _save(im, fp, tile, bufsize=0):
try:
fh = fp.fileno()
fp.flush()
except (AttributeError, io.UnsupportedOperation) as exc:
# compress to Python file-compatible object
for e, b, o, a in tile:
e = Image._getencoder(im.mode, e, a, im.encoderconfig)
if o > 0:
fp.seek(o)
e.setimage(im.im, b)
if e.pushes_fd:
e.setfd(fp)
l, s = e.encode_to_pyfd()
exc = None
except (AttributeError, io.UnsupportedOperation) as e:
exc = e
for e, b, o, a in tile:
if o > 0:
fp.seek(o)
encoder = Image._getencoder(im.mode, e, a, im.encoderconfig)
try:
encoder.setimage(im.im, b)
if encoder.pushes_fd:
encoder.setfd(fp)
l, s = encoder.encode_to_pyfd()
else:
while True:
l, s, d = e.encode(bufsize)
fp.write(d)
if s:
break
if exc:
# compress to Python file-compatible object
while True:
l, s, d = encoder.encode(bufsize)
fp.write(d)
if s:
break
else:
# slight speedup: compress to real file object
s = encoder.encode_to_file(fh, bufsize)
if s < 0:
raise OSError(f"encoder error {s} when writing image file") from exc
e.cleanup()
else:
# slight speedup: compress to real file object
for e, b, o, a in tile:
e = Image._getencoder(im.mode, e, a, im.encoderconfig)
if o > 0:
fp.seek(o)
e.setimage(im.im, b)
if e.pushes_fd:
e.setfd(fp)
l, s = e.encode_to_pyfd()
else:
s = e.encode_to_file(fh, bufsize)
if s < 0:
raise OSError(f"encoder error {s} when writing image file")
e.cleanup()
finally:
encoder.cleanup()
if hasattr(fp, "flush"):
fp.flush()