Proposed SkCanvas API for preLoading textures to VRAM

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"
@@ skipping 1752 matching lines @@
 
     GrTexture* texture;
     // We assume here that the filter will not attempt to tile the src. Otherwise, this cache lookup
     // must be pushed upstack.
     SkAutoCachedTexture act(this, src, NULL, &texture);
 
     return filter_texture(this, fContext, texture, filter, src.width(), src.height(), ctm, result,
                           offset);
 }
 
+void SkGpuDevice::internalPrivate_PreLoad(const SkBitmap& bitmap, const SkIRect& rect) {
+    // TODO: load bitmap into VRAM
+}
+
 ///////////////////////////////////////////////////////////////////////////////
 
 // must be in SkCanvas::VertexMode order
 static const GrPrimitiveType gVertexMode2PrimitiveType[] = {
     kTriangles_GrPrimitiveType,
     kTriangleStrip_GrPrimitiveType,
     kTriangleFan_GrPrimitiveType,
 };
 
 void SkGpuDevice::drawVertices(const SkDraw& draw, SkCanvas::VertexMode vmode,
@@ skipping 187 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;
 }