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Add disposal option

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linnil1 2017-01-31 03:34:48 +08:00 committed by wiredfool
parent 9fcc58d943
commit 4d8d59534f
1 changed files with 11 additions and 2 deletions
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13
PIL/GifImagePlugin.py
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@ -503,15 +503,24 @@ def _write_local_header(fp, im, offset, flags):
duration = int(im.encoderinfo["duration"] / 10)
else:
duration = 0
if "disposal" in im.encoderinfo:
disposal = int(im.encoderinfo['disposal'])
if not 0<= disposal <=3:
disposal = 2
else:
disposal = 2
if transparent_color_exists or duration != 0:
transparency_flag = 1 if transparent_color_exists else 0
packed_flag = 1 if transparent_color_exists else 0
packed_flag |= disposal << 2
if not transparent_color_exists:
transparency = 0
fp.write(b"!" +
o8(249) + # extension intro
o8(4) + # length
o8(transparency_flag) + # packed fields
o8(packed_flag) + # packed fields
o16(duration) + # duration
o8(transparency) + # transparency index
o8(0))