cc/layers/ui_resource_layer.h

   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 void PushPropertiesTo(LayerImpl* layer) override;
  24
  25   virtual void SetLayerTreeHost(LayerTreeHost* host) override;
  26
  27   void SetBitmap(const SkBitmap& skbitmap);
  28
  29   // An alternative way of setting the resource to allow for sharing.
  30   void SetUIResourceId(UIResourceId resource_id);
  31
  32   // Sets a UV transform to be used at draw time. Defaults to (0, 0) and (1, 1).
  33   void SetUV(const gfx::PointF& top_left, const gfx::PointF& bottom_right);
  34
  35   // Sets an opacity value per vertex. It will be multiplied by the layer
  36   // opacity value.
  37   void SetVertexOpacity(float bottom_left,
  38                         float top_left,
  39                         float top_right,
  40                         float bottom_right);
  41
  42   class UIResourceHolder {
  43    public:
  44     virtual UIResourceId id() = 0;
  45     virtual ~UIResourceHolder();
  46   };
  47
  48  protected:
  49   UIResourceLayer();
  50   virtual ~UIResourceLayer();
  51
  52   virtual bool HasDrawableContent() const override;
  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_