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EMF: support negative bounding box coordinates

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Similar to placeable WMF, bounding box coordinates
should be interpreted as signed integer, otherwise
opening EMF file with negative (x0,y0) fails.
This commit is contained in:
aagaidiu 2016-11-23 13:31:33 -08:00
parent 37698d8395
commit bfd09d7bf1
1 changed files with 9 additions and 4 deletions
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13
PIL/WmfImagePlugin.py
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@ -66,6 +66,11 @@ def short(c, o=0):
dword = _binary.i32le
def _long(c, o=0):
v = dword(c, o)
if v >= 1<<31:
v -= 1<<32
return v
#
# --------------------------------------------------------------------
@ -121,10 +126,10 @@ class WmfStubImageFile(ImageFile.StubImageFile):
# enhanced metafile
# get bounding box
x0 = dword(s, 8)
y0 = dword(s, 12)
x1 = dword(s, 16)
y1 = dword(s, 20)
x0 = _long(s, 8)
y0 = _long(s, 12)
x1 = _long(s, 16)
y1 = _long(s, 20)
# get frame (in 0.01 millimeter units)
frame = dword(s, 24), dword(s, 28), dword(s, 32), dword(s, 36)