Proposed SkCanvas API for preLoading textures to VRAM v2.0

include/gpu/SkGpuDevice.h

Index: include/gpu/SkGpuDevice.h
===================================================================
--- include/gpu/SkGpuDevice.h	(revision 13812)
+++ include/gpu/SkGpuDevice.h	(working copy)
@@ -14,6 +14,7 @@
 #include "SkGr.h"
 #include "SkBitmap.h"
 #include "SkBitmapDevice.h"
+#include "SkPicture.h"
 #include "SkRegion.h"
 #include "GrContext.h"
 
@@ -146,10 +147,16 @@
 
     class SkAutoCachedTexture; // used internally
 
+
 protected:
     virtual bool onReadPixels(const SkBitmap&, int x, int y, SkCanvas::Config8888) SK_OVERRIDE;
     virtual bool onWritePixels(const SkImageInfo&, const void*, size_t, int, int) SK_OVERRIDE;
 
+    /**  PRIVATE / EXPERIMENTAL -- do not call */
+    virtual void EXPERIMENTAL_optimize(SkPicture* picture) SK_OVERRIDE;
+    /**  PRIVATE / EXPERIMENTAL -- do not call */
+    virtual bool EXPERIMENTAL_drawPicture(const SkPicture& picture) SK_OVERRIDE;
+
 private:
     GrContext*      fContext;
 
@@ -215,6 +222,8 @@
                          int tileSize,
                          bool bicubic);
 
+    static SkPicture::AccelData::Key ComputeAccelDataKey();
+
     typedef SkBitmapDevice INHERITED;
 };