[Webkit-unassigned] [Bug 16169] GIF ImageDecoder hasAlpha() return value incorrect

[bugzilla-daemon at webkit.org]

http://bugs.webkit.org/show_bug.cgi?id=16169





------- Comment #1 from alp at atoker.com  2007-11-28 04:00 PDT -------
Created an attachment (id=17572)
 --> (http://bugs.webkit.org/attachment.cgi?id=17572&action=view)
Test case

Before the changes were made:

frame 1 hasAlpha: 1
frame 2 hasAlpha: 1
frame 3 hasAlpha: 1
frame 4 hasAlpha: 1
frame 5 hasAlpha: 1
frame 6 hasAlpha: 1
frame 7 hasAlpha: 1
frame 8 hasAlpha: 1
frame 9 hasAlpha: 1
frame 10 hasAlpha: 1
frame 11 hasAlpha: 1
frame 12 hasAlpha: 1

After the changes:

frame 1 hasAlpha: 1
frame 2 hasAlpha: 0
frame 3 hasAlpha: 0
frame 4 hasAlpha: 0
frame 5 hasAlpha: 0
frame 6 hasAlpha: 1
frame 7 hasAlpha: 0
frame 8 hasAlpha: 0
frame 9 hasAlpha: 0
frame 10 hasAlpha: 0
frame 11 hasAlpha: 0
frame 12 hasAlpha: 0

Frames 1 and 6 are replace/background frames -- the rest are combine frames.


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