Proposed SkCanvas API for preLoading textures to VRAM v2.0

src/core/SkCanvas.cpp

Index: src/core/SkCanvas.cpp
===================================================================
--- src/core/SkCanvas.cpp	(revision 13812)
+++ src/core/SkCanvas.cpp	(working copy)
@@ -2461,8 +2461,23 @@
 }
 
 ///////////////////////////////////////////////////////////////////////////////
+void SkCanvas::EXPERIMENTAL_optimize(SkPicture* picture) {
+    SkBaseDevice* device = this->getDevice();
+    if (NULL != device) {
+        device->EXPERIMENTAL_optimize(picture);
+    }
+}
 
 void SkCanvas::drawPicture(SkPicture& picture) {
+    SkBaseDevice* device = this->getTopDevice();
+    if (NULL != device) {
+        // Canvas has to first give the device the opportunity to render
+        // the picture itself.
+        if (device->EXPERIMENTAL_drawPicture(picture)) {
+            return; // the device has rendered the entire picture
+        }
+    }
+
     picture.draw(this);
 }