cc/layers/image_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_IMAGE_LAYER_H_
   6 #define CC_LAYERS_IMAGE_LAYER_H_
   7
   8 #include "cc/base/cc_export.h"
   9 #include "cc/layers/content_layer.h"
  10 #include "third_party/skia/include/core/SkBitmap.h"
  11
  12 namespace cc {
  13
  14 class ImageLayerUpdater;
  15
  16 // A Layer that contains only an Image element.
  17 class CC_EXPORT ImageLayer : public TiledLayer {
  18  public:
  19   static scoped_refptr<ImageLayer> Create();
  20
  21   // Layer implementation.
  22   virtual void SetTexturePriorities(const PriorityCalculator& priority_calc)
  23       OVERRIDE;
  24   virtual bool Update(ResourceUpdateQueue* queue,
  25                       const OcclusionTracker<Layer>* occlusion) OVERRIDE;
  26   virtual void CalculateContentsScale(float ideal_contents_scale,
  27                                       float* contents_scale_x,
  28                                       float* contents_scale_y,
  29                                       gfx::Size* content_bounds) OVERRIDE;
  30   virtual void OnOutputSurfaceCreated() OVERRIDE;
  31
  32   void SetBitmap(const SkBitmap& image);
  33
  34  protected:
  35   virtual bool HasDrawableContent() const OVERRIDE;
  36
  37  private:
  38   ImageLayer();
  39   virtual ~ImageLayer();
  40
  41   // TiledLayer Implementation.
  42   virtual LayerUpdater* Updater() const OVERRIDE;
  43   virtual void CreateUpdaterIfNeeded() OVERRIDE;
  44
  45   float ImageContentsScaleX() const;
  46   float ImageContentsScaleY() const;
  47
  48   SkBitmap bitmap_;
  49
  50   scoped_refptr<ImageLayerUpdater> updater_;
  51
  52   DISALLOW_COPY_AND_ASSIGN(ImageLayer);
  53 };
  54
  55 }  // namespace cc
  56
  57 #endif  // CC_LAYERS_IMAGE_LAYER_H_