cc/BitmapCanvasLayerTextureUpdater.h

   1 // Copyright 2011 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5
   6 #ifndef BitmapCanvasLayerTextureUpdater_h
   7 #define BitmapCanvasLayerTextureUpdater_h
   8
   9 #if USE(ACCELERATED_COMPOSITING)
  10
  11 #include "CanvasLayerTextureUpdater.h"
  12
  13 class SkCanvas;
  14
  15 namespace cc {
  16
  17 class LayerPainterChromium;
  18
  19 // This class rasterizes the contentRect into a skia bitmap canvas. It then updates
  20 // textures by copying from the canvas into the texture, using MapSubImage if
  21 // possible.
  22 class BitmapCanvasLayerTextureUpdater : public CanvasLayerTextureUpdater {
  23 public:
  24     class Texture : public LayerTextureUpdater::Texture {
  25     public:
  26         Texture(BitmapCanvasLayerTextureUpdater*, scoped_ptr<CCPrioritizedTexture>);
  27         virtual ~Texture();
  28
  29         virtual void updateRect(CCResourceProvider*, const IntRect& sourceRect, const IntSize& destOffset) OVERRIDE;
  30
  31     private:
  32         BitmapCanvasLayerTextureUpdater* textureUpdater() { return m_textureUpdater; }
  33
  34         BitmapCanvasLayerTextureUpdater* m_textureUpdater;
  35     };
  36
  37     static PassRefPtr<BitmapCanvasLayerTextureUpdater> create(PassOwnPtr<LayerPainterChromium>);
  38     virtual ~BitmapCanvasLayerTextureUpdater();
  39
  40     virtual PassOwnPtr<LayerTextureUpdater::Texture> createTexture(CCPrioritizedTextureManager*) OVERRIDE;
  41     virtual SampledTexelFormat sampledTexelFormat(GC3Denum textureFormat) OVERRIDE;
  42     virtual void prepareToUpdate(const IntRect& contentRect, const IntSize& tileSize, float contentsWidthScale, float contentsHeightScale, IntRect& resultingOpaqueRect, CCRenderingStats&) OVERRIDE;
  43     void updateTextureRect(CCResourceProvider*, CCPrioritizedTexture*, const IntRect& sourceRect, const IntSize& destOffset);
  44
  45     virtual void setOpaque(bool) OVERRIDE;
  46
  47 protected:
  48     explicit BitmapCanvasLayerTextureUpdater(PassOwnPtr<LayerPainterChromium>);
  49
  50     OwnPtr<SkCanvas> m_canvas;
  51     IntSize m_canvasSize;
  52     bool m_opaque;
  53 };
  54
  55 } // namespace cc
  56 #endif // USE(ACCELERATED_COMPOSITING)
  57 #endif // BitmapCanvasLayerTextureUpdater_h