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Image.rotate: Adjust variable use to avoid None & add comment re int/float.

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This commit is contained in:
neiljp (Neil Pilgrim) 2017-08-20 19:22:51 -07:00
parent 6f69379fdc
commit 470da1c6de
1 changed files with 10 additions and 6 deletions
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16
PIL/Image.py
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@ -1791,9 +1791,13 @@ class Image(object):
w, h = self.size
if translate is None:
translate = [0, 0]
post_trans = (0, 0)
else:
post_trans = translate
if center is None:
center = [w / 2.0, h / 2.0]
rotn_center = (w / 2.0, h / 2.0) # FIXME These should be rounded to ints?
else:
rotn_center = center
angle = - math.radians(angle)
matrix = [
@ -1805,10 +1809,10 @@ class Image(object):
(a, b, c, d, e, f) = matrix
return a*x + b*y + c, d*x + e*y + f
matrix[2], matrix[5] = transform(-center[0] - translate[0],
-center[1] - translate[1], matrix)
matrix[2] += center[0]
matrix[5] += center[1]
matrix[2], matrix[5] = transform(-rotn_center[0] - post_trans[0],
-rotn_center[1] - post_trans[1], matrix)
matrix[2] += rotn_center[0]
matrix[5] += rotn_center[1]
if expand:
# calculate output size