commit 28361fad1054d59ed4e6a320c7a8b8782a1487c7
author commit-bot@chromium.org <commit-bot@chromium.org@2bbb7eff-a529-9590-31e7-b0007b416f81> Fri Mar 28 16:08:05 2014 +0000
committer commit-bot@chromium.org <commit-bot@chromium.org@2bbb7eff-a529-9590-31e7-b0007b416f81> Fri Mar 28 16:08:05 2014 +0000
tree 77f1c92c7524c79802157e152429b14cf1e81d06
parent ba0c5ea90d0e6b2e8b20696e54fea13ead6dda93

Add discard API to SkCanvas, plumb it to glDiscardFramebuffer()


BUG=skia:2349
R=robertphillips@google.com, reed@google.com

Author: bsalomon@google.com

Review URL: https://codereview.chromium.org/211683002

git-svn-id: http://skia.googlecode.com/svn/trunk@13976 2bbb7eff-a529-9590-31e7-b0007b416f81

src/image/SkSurface_Gpu.cpp

diff --git a/src/image/SkSurface_Gpu.cpp b/src/image/SkSurface_Gpu.cpp
index 50d6606..2f32d2f 100644
--- a/src/image/SkSurface_Gpu.cpp
+++ b/src/image/SkSurface_Gpu.cpp
@@ -23,6 +23,7 @@
     virtual void onDraw(SkCanvas*, SkScalar x, SkScalar y,
                         const SkPaint*) SK_OVERRIDE;
     virtual void onCopyOnWrite(ContentChangeMode) SK_OVERRIDE;
+    virtual void onDiscard() SK_OVERRIDE;
 
 private:
     SkGpuDevice* fDevice;
@@ -86,9 +87,15 @@
 
         this->getCachedCanvas()->setRootDevice(newDevice);
         SkRefCnt_SafeAssign(fDevice, newDevice);
+    } else if (kDiscard_ContentChangeMode == mode) {
+        this->SkSurface_Gpu::onDiscard();
     }
 }
 
+void SkSurface_Gpu::onDiscard() {
+    fDevice->accessRenderTarget()->discard();
+}
+
 ///////////////////////////////////////////////////////////////////////////////
 
 SkSurface* SkSurface::NewRenderTargetDirect(GrRenderTarget* target) {