cc/layers/content_layer.h

   1 // Copyright 2010 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_CONTENT_LAYER_H_
   6 #define CC_LAYERS_CONTENT_LAYER_H_
   7
   8 #include "base/basictypes.h"
   9 #include "cc/base/cc_export.h"
  10 #include "cc/layers/tiled_layer.h"
  11 #include "cc/resources/layer_painter.h"
  12
  13 class SkCanvas;
  14
  15 namespace cc {
  16
  17 class ContentLayerClient;
  18 class ContentLayerUpdater;
  19
  20 class CC_EXPORT ContentLayerPainter : public LayerPainter {
  21  public:
  22   static scoped_ptr<ContentLayerPainter> Create(ContentLayerClient* client);
  23
  24   void Paint(SkCanvas* canvas, const gfx::Rect& content_rect) override;
  25
  26  private:
  27   explicit ContentLayerPainter(ContentLayerClient* client);
  28
  29   ContentLayerClient* client_;
  30
  31   DISALLOW_COPY_AND_ASSIGN(ContentLayerPainter);
  32 };
  33
  34 // A layer that renders its contents into an SkCanvas.
  35 class CC_EXPORT ContentLayer : public TiledLayer {
  36  public:
  37   static scoped_refptr<ContentLayer> Create(ContentLayerClient* client);
  38
  39   void ClearClient();
  40
  41   void SetLayerTreeHost(LayerTreeHost* layer_tree_host) override;
  42   void SetTexturePriorities(const PriorityCalculator& priority_calc) override;
  43   bool Update(ResourceUpdateQueue* queue,
  44               const OcclusionTracker<Layer>* occlusion) override;
  45   bool NeedMoreUpdates() override;
  46
  47   void SetContentsOpaque(bool contents_opaque) override;
  48
  49   bool SupportsLCDText() const override;
  50
  51   skia::RefPtr<SkPicture> GetPicture() const override;
  52
  53   void OnOutputSurfaceCreated() override;
  54
  55  protected:
  56   explicit ContentLayer(ContentLayerClient* client);
  57   ~ContentLayer() override;
  58
  59   bool HasDrawableContent() const override;
  60
  61   // TiledLayer implementation.
  62   LayerUpdater* Updater() const override;
  63
  64  private:
  65   // TiledLayer implementation.
  66   void CreateUpdaterIfNeeded() override;
  67
  68   ContentLayerClient* client_;
  69   scoped_refptr<ContentLayerUpdater> updater_;
  70
  71   DISALLOW_COPY_AND_ASSIGN(ContentLayer);
  72 };
  73
  74 }  // namespace cc
  75 #endif  // CC_LAYERS_CONTENT_LAYER_H_