chrome/browser/android/compositor/layer/thumbnail_layer.h

   1 // Copyright 2014 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 CHROME_BROWSER_ANDROID_COMPOSITOR_LAYER_THUMBNAIL_LAYER_H_
   6 #define CHROME_BROWSER_ANDROID_COMPOSITOR_LAYER_THUMBNAIL_LAYER_H_
   7
   8 #include "base/macros.h"
   9 #include "base/memory/ref_counted.h"
  10 #include "cc/layers/ui_resource_layer.h"
  11 #include "cc/resources/ui_resource_client.h"
  12 #include "chrome/browser/android/compositor/layer/layer.h"
  13 #include "ui/gfx/geometry/rect.h"
  14 #include "ui/gfx/geometry/size_f.h"
  15
  16 class Thumbnail;
  17
  18 namespace cc {
  19 class Layer;
  20 }
  21
  22 namespace chrome {
  23 namespace android {
  24
  25 // A layer to render a thumbnail.
  26 class ThumbnailLayer : public Layer {
  27  public:
  28   // Creates a ThumbnailLayer.
  29   static scoped_refptr<ThumbnailLayer> Create();
  30   // Sets thumbnail that will be shown. |thumbnail| should not be nullptr.
  31   void SetThumbnail(Thumbnail* thumbnail);
  32   // Clip the thumbnail to the given |clipping|.
  33   void Clip(const gfx::Rect& clipping);
  34   // Add self to |parent| or replace self at |index| if there already is an
  35   // instance with the same ID at |index|.
  36   void AddSelfToParentOrReplaceAt(scoped_refptr<cc::Layer> parent,
  37                                   size_t index);
  38
  39   // Implements Layer.
  40   scoped_refptr<cc::Layer> layer() override;
  41
  42  protected:
  43   ThumbnailLayer();
  44   ~ThumbnailLayer() override;
  45
  46  private:
  47   void UpdateSizes(const gfx::SizeF& content_size,
  48                    const gfx::SizeF& resource_size);
  49
  50   scoped_refptr<cc::UIResourceLayer> layer_;
  51   gfx::SizeF content_size_;
  52   gfx::Rect last_clipping_;
  53   gfx::SizeF resource_size_;
  54
  55   DISALLOW_COPY_AND_ASSIGN(ThumbnailLayer);
  56 };
  57
  58 }  // namespace android
  59 }  // namespace chrome
  60
  61 #endif  // CHROME_BROWSER_ANDROID_COMPOSITOR_LAYER_THUMBNAIL_LAYER_H_