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 OpaqueRectTrackingContentLayerDelegate_h 26 #define OpaqueRectTrackingContentLayerDelegate_h 27 28 #include "platform/PlatformExport.h" 29 #include "public/platform/WebContentLayerClient.h" 30 #include "wtf/Noncopyable.h" 31 #include "wtf/PassOwnPtr.h" 32 33 class SkCanvas; 34 35 namespace WebCore { 36 37 class GraphicsContext; 38 class IntRect; 39 40 class PLATFORM_EXPORT GraphicsContextPainter { 41 public: 42 virtual void paint(GraphicsContext&, const IntRect& clip) = 0; 43 44 protected: 45 virtual ~GraphicsContextPainter() { } 46 }; 47 48 class PLATFORM_EXPORT OpaqueRectTrackingContentLayerDelegate : public blink::WebContentLayerClient { 49 WTF_MAKE_NONCOPYABLE(OpaqueRectTrackingContentLayerDelegate); 50 public: 51 explicit OpaqueRectTrackingContentLayerDelegate(GraphicsContextPainter*); 52 virtual ~OpaqueRectTrackingContentLayerDelegate(); 53 54 // If we know that everything that will be painted through this delegate, then we don't bother 55 // tracking opaqueness. 56 void setOpaque(bool opaque) { m_opaque = opaque; } 57 58 // blink::WebContentLayerClient implementation. 59 virtual void paintContents(SkCanvas*, const blink::WebRect& clip, bool canPaintLCDText, blink::WebFloatRect& opaque, 60 blink::WebContentLayerClient::GraphicsContextStatus = GraphicsContextEnabled) OVERRIDE; 61 62 private: 63 GraphicsContextPainter* m_painter; 64 bool m_opaque; 65 }; 66 67 } 68 69 #endif // OpaqueRectTrackingContentLayerDelegate_h 70
