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Added _accept hook for XVThumbImagePlugin

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This commit is contained in:
Andrew Murray 2016-04-21 21:40:54 +10:00
parent 90955e4953
commit 53de1ba049
1 changed files with 7 additions and 3 deletions
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10
PIL/XVThumbImagePlugin.py
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@ -23,6 +23,8 @@ __version__ = "0.1"
o8 = _binary.o8
_MAGIC = b"P7 332"
# standard color palette for thumbnails (RGB332)
PALETTE = b""
for r in range(8):
@ -30,6 +32,9 @@ for r in range(8):
for b in range(4):
PALETTE = PALETTE + (o8((r*255)//7)+o8((g*255)//7)+o8((b*255)//3))
def _accept(prefix):
return prefix[:6] == _MAGIC
##
# Image plugin for XV thumbnail images.
@ -42,8 +47,7 @@ class XVThumbImageFile(ImageFile.ImageFile):
def _open(self):
# check magic
s = self.fp.read(6)
if s != b"P7 332":
if self.fp.read(6) != _MAGIC:
raise SyntaxError("not an XV thumbnail file")
# Skip to beginning of next line
@ -72,4 +76,4 @@ class XVThumbImageFile(ImageFile.ImageFile):
# --------------------------------------------------------------------
Image.register_open(XVThumbImageFile.format, XVThumbImageFile)
Image.register_open(XVThumbImageFile.format, XVThumbImageFile, _accept)