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

[bugzilla-daemon at webkit.org]

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





--- Comment #36 from Hin-Chung Lam <hclam at google.com>  2012-07-19 23:16:02 PST ---
(In reply to comment #35)
> I know this is tangential, but while you're pondering the image decoding pipeline and any eventual refactorings, keep in mind also that it would be nice someday to be able to tell the image decoders to decode directly to a scaled-down output buffer (for large images that are not displayed at 1:1 on the page, a surprisingly common case).  We've never had this because it requires plumbing the desired output size over to the decoders and then making decisions about how to cache the results (do we decode full-size, downsample, and cache both? Or for some image formats can we efficiently decode directly to a scaled-down buffer, cache that, but retain sufficient metadata to correctly handle later requests for other sizes?  etc.)
> 
> I don't want to distract from the goal at hand here -- just figuring this would be a good audience to mention some of these concerns to :)

It is great that the vision of optimizing downscaled image decoding pipeline is shared by someone else. In fact this is what got me started on this work. I am very happy to discuss this matter with the right audience on a separate thread. :)

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