commit f226b9975b4880ec1ec4f6f773aaf41bfcc29d19
author commit-queue@webkit.org <commit-queue@webkit.org@268f45cc-cd09-0410-ab3c-d52691b4dbfc> Fri Nov 16 01:22:03 2012 +0000
committer commit-queue@webkit.org <commit-queue@webkit.org@268f45cc-cd09-0410-ab3c-d52691b4dbfc> Fri Nov 16 01:22:03 2012 +0000
tree baf728ccf817e65994354aa294bfc26dcfd9dc2d
parent 48e6befa9be65e0823d21d2cea4d953a5c8ea678

Coordinated Graphics: A Minor optimization of calculating transforms in CoordinagedGraphicsLayer.
https://bugs.webkit.org/show_bug.cgi?id=102309

We calculate an inverse transform each tiledBackingStoreVisibleRect() call by
a TiledBackingStore and every tiles.
This patch caches the inverse transform to reuse it.

Patch by Huang Dongsung <luxtella@company100.net> on 2012-11-15
Reviewed by Noam Rosenthal.

* WebProcess/WebPage/CoordinatedGraphics/CoordinatedGraphicsLayer.cpp:
(WebCore::CoordinatedGraphicsLayer::tiledBackingStoreVisibleRect):
(WebCore::CoordinatedGraphicsLayer::computeTransformedVisibleRect):
* WebProcess/WebPage/CoordinatedGraphics/CoordinatedGraphicsLayer.h:
(CoordinatedGraphicsLayer):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@134868 268f45cc-cd09-0410-ab3c-d52691b4dbfc