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      1 // Copyright 2013 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 #ifndef CC_LAYERS_UI_RESOURCE_LAYER_H_
      6 #define CC_LAYERS_UI_RESOURCE_LAYER_H_
      7 
      8 #include "base/memory/scoped_ptr.h"
      9 #include "cc/base/cc_export.h"
     10 #include "cc/layers/layer.h"
     11 #include "cc/resources/ui_resource_client.h"
     12 #include "ui/gfx/rect.h"
     13 
     14 namespace cc {
     15 
     16 class LayerTreeHost;
     17 class ScopedUIResource;
     18 
     19 class CC_EXPORT UIResourceLayer : public Layer {
     20  public:
     21   static scoped_refptr<UIResourceLayer> Create();
     22 
     23   virtual bool DrawsContent() const OVERRIDE;
     24 
     25   virtual void PushPropertiesTo(LayerImpl* layer) OVERRIDE;
     26 
     27   virtual void SetLayerTreeHost(LayerTreeHost* host) OVERRIDE;
     28 
     29   void SetBitmap(const SkBitmap& skbitmap);
     30 
     31   // An alternative way of setting the resource to allow for sharing.
     32   void SetUIResourceId(UIResourceId resource_id);
     33 
     34   // Sets a UV transform to be used at draw time. Defaults to (0, 0) and (1, 1).
     35   void SetUV(const gfx::PointF& top_left, const gfx::PointF& bottom_right);
     36 
     37   // Sets an opacity value per vertex. It will be multiplied by the layer
     38   // opacity value.
     39   void SetVertexOpacity(float bottom_left,
     40                         float top_left,
     41                         float top_right,
     42                         float bottom_right);
     43 
     44   class UIResourceHolder {
     45    public:
     46     virtual UIResourceId id() = 0;
     47     virtual ~UIResourceHolder();
     48   };
     49 
     50  protected:
     51   UIResourceLayer();
     52   virtual ~UIResourceLayer();
     53 
     54   scoped_ptr<UIResourceHolder> ui_resource_holder_;
     55   SkBitmap bitmap_;
     56 
     57   gfx::PointF uv_top_left_;
     58   gfx::PointF uv_bottom_right_;
     59   float vertex_opacity_[4];
     60 
     61  private:
     62   virtual scoped_ptr<LayerImpl> CreateLayerImpl(LayerTreeImpl* tree_impl)
     63       OVERRIDE;
     64   void RecreateUIResourceHolder();
     65 
     66 
     67 
     68   DISALLOW_COPY_AND_ASSIGN(UIResourceLayer);
     69 };
     70 
     71 }  // namespace cc
     72 
     73 #endif  // CC_LAYERS_UI_RESOURCE_LAYER_H_
     74