Data copies from RGB m_rgbBuffer to the pixel backing store, via buffer.setRGBA(), are costly.
Created attachment 118725 [details]
Comment on attachment 118725 [details]
Clearing flags on attachment: 118725
Committed r102561: <http://trac.webkit.org/changeset/102561>
All reviewed patches have been landed. Closing bug.
lgtm. Thanks for doing this!
This means: every incoming features (alpha, etc.) will have to be thought-out mainly from the incremental perspective.
s/mainly/eventually/, if alpha images did not initially support progressive decodes, I'd use "allDataReceived" in the code.
Of course early in decoding setup, where grab the image size say, is where I'd want to find out if the image has alpha.