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Only duplicate the file descriptor when acually passing it to

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libtiff.  From: Sebastian Krause <sebastian@realpath.org>
This commit is contained in:
wiredfool 2016-09-29 22:14:51 +01:00
parent 8f49022ac5
commit 41cbd4f4d3
1 changed files with 23 additions and 21 deletions
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44
PIL/TiffImagePlugin.py
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@ -1036,8 +1036,28 @@ class TiffImageFile(ImageFile.ImageFile):
# (self._compression, (extents tuple),
# 0, (rawmode, self._compression, fp))
extents = self.tile[0][1]
args = self.tile[0][3] + (self.tag_v2.offset,)
decoder = Image._getdecoder(self.mode, 'libtiff', args,
args = list(self.tile[0][3]) + [self.tag_v2.offset]
# To be nice on memory footprint, if there's a
# file descriptor, use that instead of reading
# into a string in python.
# libtiff closes the file descriptor, so pass in a dup.
try:
fp = hasattr(self.fp, "fileno") and os.dup(self.fp.fileno())
# flush the file descriptor, prevents error on pypy 2.4+
# should also eliminate the need for fp.tell for py3
# in _seek
if hasattr(self.fp, "flush"):
self.fp.flush()
except IOError:
# io.BytesIO have a fileno, but returns an IOError if
# it doesn't use a file descriptor.
fp = False
if fp:
args[2] = fp
decoder = Image._getdecoder(self.mode, 'libtiff', tuple(args),
self.decoderconfig)
try:
decoder.setimage(self.im, extents)
@ -1190,24 +1210,6 @@ class TiffImageFile(ImageFile.ImageFile):
self.use_load_libtiff = True
# To be nice on memory footprint, if there's a
# file descriptor, use that instead of reading
# into a string in python.
# libtiff closes the file descriptor, so pass in a dup.
try:
fp = hasattr(self.fp, "fileno") and \
os.dup(self.fp.fileno())
# flush the file descriptor, prevents error on pypy 2.4+
# should also eliminate the need for fp.tell for py3
# in _seek
if hasattr(self.fp, "flush"):
self.fp.flush()
except IOError:
# io.BytesIO have a fileno, but returns an IOError if
# it doesn't use a file descriptor.
fp = False
# libtiff handles the fillmode for us, so 1;IR should
# actually be 1;I. Including the R double reverses the
# bits, so stripes of the image are reversed. See
@ -1233,7 +1235,7 @@ class TiffImageFile(ImageFile.ImageFile):
# Offset in the tile tuple is 0, we go from 0,0 to
# w,h, and we only do this once -- eds
a = (rawmode, self._compression, fp)
a = (rawmode, self._compression, False)
self.tile.append(
(self._compression,
(0, 0, w, ysize),