content/browser/renderer_host/backing_store_aura.h

   1 // Copyright (c) 2012 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 CONTENT_BROWSER_RENDERER_HOST_BACKING_STORE_AURA_H_
   6 #define CONTENT_BROWSER_RENDERER_HOST_BACKING_STORE_AURA_H_
   7
   8 #include "base/memory/scoped_ptr.h"
   9 #include "content/browser/renderer_host/backing_store.h"
  10 #include "content/common/content_export.h"
  11 #include "third_party/skia/include/core/SkBitmap.h"
  12
  13 class SkCanvas;
  14
  15 namespace gfx {
  16 class Point;
  17 class Canvas;
  18 }
  19
  20 namespace content {
  21 class RenderProcessHost;
  22
  23 // A backing store that uses skia. This is the backing store used by
  24 // RenderWidgetHostViewAura.
  25 class BackingStoreAura : public BackingStore {
  26  public:
  27   CONTENT_EXPORT BackingStoreAura(
  28       RenderWidgetHost* widget,
  29       const gfx::Size& size);
  30
  31   virtual ~BackingStoreAura();
  32
  33   CONTENT_EXPORT void SkiaShowRect(const gfx::Point& point,
  34                                    gfx::Canvas* canvas);
  35
  36   // Called when the view's backing scale factor changes.
  37   void ScaleFactorChanged(float device_scale_factor);
  38
  39   // BackingStore implementation.
  40   virtual size_t MemorySize() OVERRIDE;
  41   virtual void PaintToBackingStore(
  42       RenderProcessHost* process,
  43       TransportDIB::Id bitmap,
  44       const gfx::Rect& bitmap_rect,
  45       const std::vector<gfx::Rect>& copy_rects,
  46       float scale_factor,
  47       const base::Closure& completion_callback,
  48       bool* scheduled_completion_callback) OVERRIDE;
  49   virtual bool CopyFromBackingStore(const gfx::Rect& rect,
  50                                     skia::PlatformBitmap* output) OVERRIDE;
  51   virtual void ScrollBackingStore(const gfx::Vector2d& delta,
  52                                   const gfx::Rect& clip_rect,
  53                                   const gfx::Size& view_size) OVERRIDE;
  54
  55  private:
  56   SkBitmap bitmap_;
  57
  58   scoped_ptr<SkCanvas> canvas_;
  59   float device_scale_factor_;
  60
  61   DISALLOW_COPY_AND_ASSIGN(BackingStoreAura);
  62 };
  63
  64 }  // namespace content
  65
  66 #endif  // CONTENT_BROWSER_RENDERER_HOST_BACKING_STORE_AURA_H_