Proposed SkCanvas API for preLoading textures to VRAM v2.0

src/gpu/SkGpuDevice.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkGpuDevice.h"
 
 #include "effects/GrBicubicEffect.h"
 #include "effects/GrTextureDomain.h"
 #include "effects/GrSimpleTextureEffect.h"
 
 #include "GrContext.h"
 #include "GrBitmapTextContext.h"
 #include "GrDistanceFieldTextContext.h"
 
 #include "SkGrTexturePixelRef.h"
 
 #include "SkBounder.h"
 #include "SkColorFilter.h"
 #include "SkDeviceImageFilterProxy.h"
 #include "SkDrawProcs.h"
 #include "SkGlyphCache.h"
 #include "SkImageFilter.h"
 #include "SkMaskFilter.h"
 #include "SkPathEffect.h"
+#include "SkPicture.h"
 #include "SkRRect.h"
 #include "SkStroke.h"
 #include "SkSurface.h"
 #include "SkTLazy.h"
 #include "SkUtils.h"
 #include "SkErrorInternals.h"
 
 #define CACHE_COMPATIBLE_DEVICE_TEXTURES 1
 
 #if 0
@@ skipping 1954 matching lines @@
                          GrTexture* texture,
                          bool needClear)
     : SkBitmapDevice(make_bitmap(context, texture->asRenderTarget())) {
 
     SkASSERT(texture && texture->asRenderTarget());
     // This constructor is called from onCreateDevice. It has locked the RT in the texture
     // cache. We pass true for the third argument so that it will get unlocked.
     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;
+    }
+
+    const GPUAccelData *gpuData = static_cast<const GPUAccelData*>(data);
+    gpuData;
+
+    return false;
+}