Adding class SkDeferredCanvas for deferred rendering.

TEST=added a new pass to gm, so all gm tests are run through SkDeferredCanvas
REVIEW=http://codereview.appspot.com/5430058/



git-svn-id: http://skia.googlecode.com/svn/trunk@3059 2bbb7eff-a529-9590-31e7-b0007b416f81

1 files changed, 5 insertions, 0 deletions

diff --git a/src/core/SkCanvas.cpp b/src/core/SkCanvas.cpp
index 87da90ad9f..9664ffaf91 100644
--- a/src/core/SkCanvas.cpp
+++ b/src/core/SkCanvas.cpp
@@ -214,6 +214,7 @@ private:
 class SkDrawIter : public SkDraw {
 public:
     SkDrawIter(SkCanvas* canvas, bool skipEmptyClips = true) {
+        canvas = canvas->canvasForDrawIter();
         fCanvas = canvas;
         canvas->updateDeviceCMCache();
 
@@ -591,6 +592,10 @@ void SkCanvas::writePixels(const SkBitmap& bitmap, int x, int y,
     }
 }
 
+SkCanvas* SkCanvas::canvasForDrawIter() {
+    return this;
+}
+
 //////////////////////////////////////////////////////////////////////////////
 
 void SkCanvas::updateDeviceCMCache() {