Proposed SkCanvas API for preLoading textures to VRAM v2.0

src/gpu/SkGpuDevice.cpp

Index: src/gpu/SkGpuDevice.cpp
===================================================================
--- src/gpu/SkGpuDevice.cpp	(revision 13812)
+++ src/gpu/SkGpuDevice.cpp	(working copy)
@@ -25,6 +25,7 @@
 #include "SkImageFilter.h"
 #include "SkMaskFilter.h"
 #include "SkPathEffect.h"
+#include "SkPicture.h"
 #include "SkRRect.h"
 #include "SkStroke.h"
 #include "SkSurface.h"
@@ -2003,3 +2004,44 @@
     this->initFromRenderTarget(context, texture->asRenderTarget(), true);
     fNeedClear = needClear;
 }
+
+class GPUAccelData : public SkPicture::AccelData {
+public:
+    GPUAccelData(Key key) : INHERITED(key) { }
+
+protected:
+
+private:
+    typedef SkPicture::AccelData INHERITED;
+};
+
+// In the future this may not be a static method if we need to incorporate the
+// clip and matrix state into the key
+SkPicture::AccelData::Key SkGpuDevice::ComputeAccelDataKey() {
+    static const SkPicture::AccelData::Key gGPUID = SkPicture::AccelData::GenerateDomain();
+
+    return gGPUID;
+}
+
+void SkGpuDevice::EXPERIMENTAL_optimize(SkPicture* picture) {
+    SkPicture::AccelData::Key key = ComputeAccelDataKey();
+
+    GPUAccelData* data = SkNEW_ARGS(GPUAccelData, (key));
+
+    picture->EXPERIMENTAL_addAccelData(data);
+}
+
+bool SkGpuDevice::EXPERIMENTAL_drawPicture(const SkPicture& picture) {
+    SkPicture::AccelData::Key key = ComputeAccelDataKey();
+
+    const SkPicture::AccelData* data = picture.EXPERIMENTAL_getAccelData(key);
+    if (NULL == data) {
+        return false;
+    }
+
+#if 0
+    const GPUAccelData *gpuData = static_cast<const GPUAccelData*>(data);
+#endif
+
+    return false;
+}