Optimize canvas fills / drawImage when covering entire canvas
https://bugs.webkit.org/show_bug.cgi?id=70789
Patch by Ben Wells <benwells@chromium.org> on 2011-11-03
Reviewed by Stephen White.
If we're filling a rect or drawing an image, and it covers the entire canvas, we don't
need to worry about clearing outside the area updated by the operation if we're in
a composite mode that requires this (such as source-in, copy, etc.). In this case we
can take the simple path through the code and save a clear (for copy) or a temporary
image buffer (for the other modes).
No new tests - optimization, behaviour is unchanged and covered by existing tests.
* html/canvas/CanvasRenderingContext2D.cpp:
(WebCore::CanvasRenderingContext2D::fillRect):
(WebCore::CanvasRenderingContext2D::drawImage):
(WebCore::CanvasRenderingContext2D::rectContainsCanvas):
* html/canvas/CanvasRenderingContext2D.h:
git-svn-id: http://svn.webkit.org/repository/webkit/trunk@99257 268f45cc-cd09-0410-ab3c-d52691b4dbfc
3 files changed
