1 /* 2 * Copyright (C) 2003, 2009, 2012 Apple Inc. All rights reserved. 3 * Copyright (C) 2013 Intel Corporation. All rights reserved. 4 * 5 * Portions are Copyright (C) 1998 Netscape Communications Corporation. 6 * 7 * Other contributors: 8 * Robert O'Callahan <roc+@cs.cmu.edu> 9 * David Baron <dbaron (at) fas.harvard.edu> 10 * Christian Biesinger <cbiesinger (at) web.de> 11 * Randall Jesup <rjesup (at) wgate.com> 12 * Roland Mainz <roland.mainz (at) informatik.med.uni-giessen.de> 13 * Josh Soref <timeless (at) mac.com> 14 * Boris Zbarsky <bzbarsky (at) mit.edu> 15 * 16 * This library is free software; you can redistribute it and/or 17 * modify it under the terms of the GNU Lesser General Public 18 * License as published by the Free Software Foundation; either 19 * version 2.1 of the License, or (at your option) any later version. 20 * 21 * This library is distributed in the hope that it will be useful, 22 * but WITHOUT ANY WARRANTY; without even the implied warranty of 23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 24 * Lesser General Public License for more details. 25 * 26 * You should have received a copy of the GNU Lesser General Public 27 * License along with this library; if not, write to the Free Software 28 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 29 * 30 * Alternatively, the contents of this file may be used under the terms 31 * of either the Mozilla Public License Version 1.1, found at 32 * http://www.mozilla.org/MPL/ (the "MPL") or the GNU General Public 33 * License Version 2.0, found at http://www.fsf.org/copyleft/gpl.html 34 * (the "GPL"), in which case the provisions of the MPL or the GPL are 35 * applicable instead of those above. If you wish to allow use of your 36 * version of this file only under the terms of one of those two 37 * licenses (the MPL or the GPL) and not to allow others to use your 38 * version of this file under the LGPL, indicate your decision by 39 * deletingthe provisions above and replace them with the notice and 40 * other provisions required by the MPL or the GPL, as the case may be. 41 * If you do not delete the provisions above, a recipient may use your 42 * version of this file under any of the LGPL, the MPL or the GPL. 43 */ 44 45 #ifndef RenderLayerBlendInfo_h 46 #define RenderLayerBlendInfo_h 47 48 #include "public/platform/WebBlendMode.h" 49 #include "wtf/Assertions.h" 50 #include "wtf/Noncopyable.h" 51 52 namespace WebCore { 53 54 class RenderLayerModelObject; 55 56 class RenderLayerBlendInfo { 57 WTF_MAKE_NONCOPYABLE(RenderLayerBlendInfo); 58 public: 59 explicit RenderLayerBlendInfo(RenderLayerModelObject&); 60 61 bool hasBlendMode() const; 62 void updateBlendMode(); 63 64 bool childLayerHasBlendMode() const 65 { 66 ASSERT(!m_childLayerHasBlendModeStatusDirty); 67 return m_childLayerHasBlendMode; 68 } 69 bool childLayerHasBlendModeWhileDirty() const { return m_childLayerHasBlendMode; } 70 71 void setChildLayerHasBlendMode(bool b) { m_childLayerHasBlendMode = b; } 72 73 bool childLayerHasBlendModeStatusDirty() const { return m_childLayerHasBlendModeStatusDirty; } 74 void setChildLayerHasBlendModeStatusDirty(bool b) { m_childLayerHasBlendModeStatusDirty = b; } 75 76 void setAncestorChainBlendedDescendant(); 77 void dirtyAncestorChainBlendedDescendantStatus(); 78 79 blink::WebBlendMode blendMode() const { return m_blendMode; } 80 81 private: 82 RenderLayerModelObject& m_renderer; 83 blink::WebBlendMode m_blendMode; 84 85 unsigned m_childLayerHasBlendMode : 1; 86 unsigned m_childLayerHasBlendModeStatusDirty : 1; 87 }; 88 89 } // namespace WebCore 90 91 #endif // RenderLayerBlendInfo_h 92
