RESOLVED INVALID 46784
Animated GIF visual glitches/noise under "do not dispose" method 
https://bugs.webkit.org/show_bug.cgi?id=46784
Summary Animated GIF visual glitches/noise under "do not dispose" method
Elliot Block
Reported 2010-09-28 22:56:22 PDT
Created attachment 69161 [details] GIF showing visual noise bug Animated GIFs that use the "do not dispose" method are showing glitches/visual noise that is not supposed to be there. See attached "OldProgress.gif" for example. When tweaked to "unspecified" disposal method (NewProgress.gif) the issue is much less severe.
Attachments
GIF showing visual noise bug (644 bytes, image/gif)
2010-09-28 22:56 PDT, Elliot Block 		no flags
Details
Modified GIF with different disposal method shows less noise (644 bytes, image/gif)
2010-09-28 22:56 PDT, Elliot Block 		no flags
Details
View All Add attachment proposed patch, testcase, etc.
Elliot Block
Comment 1 2010-09-28 22:56:57 PDT
Created attachment 69162 [details] Modified GIF with different disposal method shows less noise
Alexey Proskuryakov
Comment 2 2010-09-30 12:37:19 PDT
<rdar://problem/8498651>
Alexey Proskuryakov
Comment 3 2010-09-30 12:39:39 PDT
I can reproduce this with Preview.app on Mac, not only in Safari. This is a bug below WebKit, so closing as INVALID. It will continue to be tracked by Apple internally.
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