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

[bugzilla-daemon at webkit.org]

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





--- Comment #45 from Hin-Chung Lam <hclam at google.com>  2012-07-30 11:50:47 PST ---
(In reply to comment #44)
> I think we also need to talk more on testing. Because parallel image decoding (or asynchronous image decoding) extensively changes the behavior, we must have pretty good test coverage. But it seems image decoding has been historically under-tested due to lack of tools. I filed Bug 92470 to discuss this issue.

Thanks for filing the bug on testing.

I have a refactoring patch in mind that will address the issues raised by Dongsung, in particular the use of metadata functions.

My goal of this patch is to remove currentFrameHasAlpha() and frameHasAlphaAtIndex() from Image. This is a tricky task but I think is achievable. Doing so would leave most metadata functions protected / internal to BitmapImage and I shall have better answers to your questions.

I'll post a patch in a couple days.

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