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/geometry/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(const LayerSettings& settings);
  22
  23   void PushPropertiesTo(LayerImpl* layer) override;
  24
  25   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. If you use
  30   // this method, you are responsible for updating the ID if the layer moves
  31   // between compositors.
  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   explicit UIResourceLayer(const LayerSettings& settings);
  52   ~UIResourceLayer() override;
  53
  54   bool HasDrawableContent() const override;
  55
  56   scoped_ptr<UIResourceHolder> ui_resource_holder_;
  57   SkBitmap bitmap_;
  58
  59   gfx::PointF uv_top_left_;
  60   gfx::PointF uv_bottom_right_;
  61   float vertex_opacity_[4];
  62
  63  private:
  64   scoped_ptr<LayerImpl> CreateLayerImpl(LayerTreeImpl* tree_impl) override;
  65   void RecreateUIResourceHolder();
  66
  67   DISALLOW_COPY_AND_ASSIGN(UIResourceLayer);
  68 };
  69
  70 }  // namespace cc
  71
  72 #endif  // CC_LAYERS_UI_RESOURCE_LAYER_H_