Optimize Canvas fill and drawImage with SourceIn, DestinationIn, SourceOut, and DestinationAtop using transparencyLayer.
https://bugs.webkit.org/show_bug.cgi?id=79659
Patch by Dirk Schulze <krit@webkit.org> on 2014-04-11
Reviewed by Andreas Kling.
Add performance tests for fillRect() and drawImage() on composited contexts.
* Canvas/compositing-drawimage.html: Added.
* Canvas/compositing-fillRect.html: Added.
git-svn-id: https://svn.webkit.org/repository/webkit/trunk@167123
268f45cc-cd09-0410-ab3c-
d52691b4dbfc