third_party/WebKit/Source/platform/graphics/ContentLayerDelegate.h

   1 /*
   2  * Copyright (C) 2012 Google Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1.  Redistributions of source code must retain the above copyright
   8  *     notice, this list of conditions and the following disclaimer.
   9  * 2.  Redistributions in binary form must reproduce the above copyright
  10  *     notice, this list of conditions and the following disclaimer in the
  11  *     documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
  14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  15  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  16  * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
  17  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  18  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  19  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  20  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  21  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  22  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  23  */
  24
  25 #ifndef ContentLayerDelegate_h
  26 #define ContentLayerDelegate_h
  27
  28 #include "platform/PlatformExport.h"
  29 #include "platform/geometry/IntSize.h"
  30 #include "public/platform/WebContentLayerClient.h"
  31 #include "wtf/Noncopyable.h"
  32 #include "wtf/PassOwnPtr.h"
  33
  34 class SkCanvas;
  35
  36 namespace blink {
  37
  38 class DisplayItemList;
  39 class GraphicsContext;
  40 class IntRect;
  41
  42 class PLATFORM_EXPORT GraphicsContextPainter {
  43 public:
  44     virtual void paint(GraphicsContext&, const IntRect& clip) = 0;
  45     virtual DisplayItemList* displayItemList() = 0;
  46
  47 protected:
  48     virtual ~GraphicsContextPainter() { }
  49 };
  50
  51 class PLATFORM_EXPORT ContentLayerDelegate : public WebContentLayerClient {
  52     WTF_MAKE_NONCOPYABLE(ContentLayerDelegate);
  53
  54 public:
  55     explicit ContentLayerDelegate(GraphicsContextPainter*);
  56     ~ContentLayerDelegate() override;
  57
  58     // WebContentLayerClient implementation.
  59     void paintContents(SkCanvas*, const WebRect& clip, WebContentLayerClient::PaintingControlSetting = PaintDefaultBehavior) override;
  60     void paintContents(WebDisplayItemList*, const WebRect& clip, WebContentLayerClient::PaintingControlSetting = PaintDefaultBehavior) override;
  61     size_t approximateUnsharedMemoryUsage() const override;
  62
  63 private:
  64     GraphicsContextPainter* m_painter;
  65 };
  66
  67 } // namespace blink
  68
  69 #endif // ContentLayerDelegate_h