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 bool DrawsContent() const OVERRIDE;
  23   virtual void SetTexturePriorities(const PriorityCalculator& priority_calc)
  24       OVERRIDE;
  25   virtual bool Update(ResourceUpdateQueue* queue,
  26                       const OcclusionTracker<Layer>* occlusion) OVERRIDE;
  27   virtual void CalculateContentsScale(float ideal_contents_scale,
  28                                       float device_scale_factor,
  29                                       float page_scale_factor,
  30                                       float maximum_animation_contents_scale,
  31                                       bool animating_transform_to_screen,
  32                                       float* contents_scale_x,
  33                                       float* contents_scale_y,
  34                                       gfx::Size* content_bounds) OVERRIDE;
  35   virtual void OnOutputSurfaceCreated() OVERRIDE;
  36
  37   void SetBitmap(const SkBitmap& image);
  38
  39  private:
  40   ImageLayer();
  41   virtual ~ImageLayer();
  42
  43   // TiledLayer Implementation.
  44   virtual LayerUpdater* Updater() const OVERRIDE;
  45   virtual void CreateUpdaterIfNeeded() OVERRIDE;
  46
  47   float ImageContentsScaleX() const;
  48   float ImageContentsScaleY() const;
  49
  50   SkBitmap bitmap_;
  51
  52   scoped_refptr<ImageLayerUpdater> updater_;
  53
  54   DISALLOW_COPY_AND_ASSIGN(ImageLayer);
  55 };
  56
  57 }  // namespace cc
  58
  59 #endif  // CC_LAYERS_IMAGE_LAYER_H_