[Webkit-unassigned] [Bug 90375] Parallel image decoders

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=90375





--- Comment #71 from Hin-Chung Lam <hclam at google.com>  2012-08-03 19:05:39 PST ---
> If we don't make frameIsCompleteAtIndex() not trigger image decoding, I'm afraid that other developers will be easy to make a mistake to use frameIsCompleteAtIndex() and it can cause to stop parallel image decoding.

To do this I think we need to detach frameIsCompleteAtIndex() from general image frames and relate it only to animated GIF. My thought is createFrameAtIndex() (or in the future requestFrameAtIndex()) would include the state of the frame, i.e. isComplete, etc. This way we can push the logic of GIF animation into GIF image decoder (or another class).

Before that we'll need to modify GIFImageDecoder to give these information before actually a frame. It feels like a distraction to me though.

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