1 /* 2 * Copyright (C) 2009, 2010 Apple Inc. All rights reserved. 3 * Copyright (C) 2014 Google Inc. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY 15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR 18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 21 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 22 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #ifndef GraphicsLayerUpdater_h 28 #define GraphicsLayerUpdater_h 29 30 #include "platform/graphics/GraphicsLayer.h" 31 32 namespace WebCore { 33 34 class RenderLayer; 35 36 class GraphicsLayerUpdater { 37 class UpdateContext { 38 public: UpdateContext()39 UpdateContext() 40 : m_compositingStackingContext(0) 41 , m_compositingAncestor(0) 42 { 43 } 44 45 UpdateContext(const UpdateContext&, const RenderLayer&); 46 47 const RenderLayer* compositingContainer(const RenderLayer&) const; 48 private: 49 const RenderLayer* m_compositingStackingContext; 50 const RenderLayer* m_compositingAncestor; 51 }; 52 53 public: 54 GraphicsLayerUpdater(); 55 ~GraphicsLayerUpdater(); 56 57 enum UpdateType { 58 DoNotForceUpdate, 59 ForceUpdate, 60 }; 61 62 void update(Vector<RenderLayer*>& layersNeedingPaintInvalidation, RenderLayer&, UpdateType = DoNotForceUpdate, const UpdateContext& = UpdateContext()); 63 void rebuildTree(RenderLayer&, GraphicsLayerVector& childLayersOfEnclosingLayer); 64 needsRebuildTree()65 bool needsRebuildTree() const { return m_needsRebuildTree; } 66 67 #if ASSERT_ENABLED 68 static void assertNeedsToUpdateGraphicsLayerBitsCleared(RenderLayer&); 69 #endif 70 71 private: 72 bool m_needsRebuildTree; 73 }; 74 75 } // namespace WebCore 76 77 #endif // GraphicsLayerUpdater_h 78