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(const LayerSettings& settings);
  20
  21   // Layer implementation.
  22   void SetTexturePriorities(const PriorityCalculator& priority_calc) override;
  23   bool Update(ResourceUpdateQueue* queue,
  24               const OcclusionTracker<Layer>* occlusion) override;
  25   void CalculateContentsScale(float ideal_contents_scale,
  26                               float* contents_scale_x,
  27                               float* contents_scale_y,
  28                               gfx::Size* content_bounds) override;
  29   void OnOutputSurfaceCreated() override;
  30
  31   void SetBitmap(const SkBitmap& image);
  32
  33  protected:
  34   bool HasDrawableContent() const override;
  35
  36  private:
  37   explicit ImageLayer(const LayerSettings& settings);
  38   ~ImageLayer() override;
  39
  40   // TiledLayer Implementation.
  41   LayerUpdater* Updater() const override;
  42   void CreateUpdaterIfNeeded() override;
  43
  44   float ImageContentsScaleX() const;
  45   float ImageContentsScaleY() const;
  46
  47   SkBitmap bitmap_;
  48
  49   scoped_refptr<ImageLayerUpdater> updater_;
  50
  51   DISALLOW_COPY_AND_ASSIGN(ImageLayer);
  52 };
  53
  54 }  // namespace cc
  55
  56 #endif  // CC_LAYERS_IMAGE_LAYER_H_