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| 1 /* | |
| 2 * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights
reserved. | |
| 3 * | |
| 4 * Portions are Copyright (C) 1998 Netscape Communications Corporation. | |
| 5 * | |
| 6 * Other contributors: | |
| 7 * Robert O'Callahan <roc+@cs.cmu.edu> | |
| 8 * David Baron <dbaron@fas.harvard.edu> | |
| 9 * Christian Biesinger <cbiesinger@web.de> | |
| 10 * Randall Jesup <rjesup@wgate.com> | |
| 11 * Roland Mainz <roland.mainz@informatik.med.uni-giessen.de> | |
| 12 * Josh Soref <timeless@mac.com> | |
| 13 * Boris Zbarsky <bzbarsky@mit.edu> | |
| 14 * | |
| 15 * This library is free software; you can redistribute it and/or | |
| 16 * modify it under the terms of the GNU Lesser General Public | |
| 17 * License as published by the Free Software Foundation; either | |
| 18 * version 2.1 of the License, or (at your option) any later version. | |
| 19 * | |
| 20 * This library is distributed in the hope that it will be useful, | |
| 21 * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 23 * Lesser General Public License for more details. | |
| 24 * | |
| 25 * You should have received a copy of the GNU Lesser General Public | |
| 26 * License along with this library; if not, write to the Free Software | |
| 27 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 US
A | |
| 28 * | |
| 29 * Alternatively, the contents of this file may be used under the terms | |
| 30 * of either the Mozilla Public License Version 1.1, found at | |
| 31 * http://www.mozilla.org/MPL/ (the "MPL") or the GNU General Public | |
| 32 * License Version 2.0, found at http://www.fsf.org/copyleft/gpl.html | |
| 33 * (the "GPL"), in which case the provisions of the MPL or the GPL are | |
| 34 * applicable instead of those above. If you wish to allow use of your | |
| 35 * version of this file only under the terms of one of those two | |
| 36 * licenses (the MPL or the GPL) and not to allow others to use your | |
| 37 * version of this file under the LGPL, indicate your decision by | |
| 38 * deletingthe provisions above and replace them with the notice and | |
| 39 * other provisions required by the MPL or the GPL, as the case may be. | |
| 40 * If you do not delete the provisions above, a recipient may use your | |
| 41 * version of this file under any of the LGPL, the MPL or the GPL. | |
| 42 */ | |
| 43 | |
| 44 #include "config.h" | |
| 45 #include "core/rendering/RenderLayerBlendInfo.h" | |
| 46 | |
| 47 #include "core/rendering/RenderLayer.h" | |
| 48 #include "core/rendering/RenderLayerModelObject.h" | |
| 49 #include "core/rendering/compositing/CompositedLayerMapping.h" | |
| 50 #include "platform/RuntimeEnabledFeatures.h" | |
| 51 | |
| 52 namespace blink { | |
| 53 | |
| 54 RenderLayerBlendInfo::RenderLayerBlendInfo(RenderLayerModelObject& renderer) | |
| 55 : m_renderer(renderer) | |
| 56 , m_blendMode(blink::WebBlendModeNormal) | |
| 57 , m_childLayerHasBlendMode(false) | |
| 58 , m_childLayerHasBlendModeStatusDirty(false) | |
| 59 { | |
| 60 } | |
| 61 | |
| 62 bool RenderLayerBlendInfo::hasBlendMode() const | |
| 63 { | |
| 64 return RuntimeEnabledFeatures::cssCompositingEnabled() && m_renderer.hasBlen
dMode(); | |
| 65 } | |
| 66 | |
| 67 void RenderLayerBlendInfo::updateBlendMode() | |
| 68 { | |
| 69 if (!RuntimeEnabledFeatures::cssCompositingEnabled()) | |
| 70 return; | |
| 71 | |
| 72 blink::WebBlendMode newBlendMode = m_renderer.style()->blendMode(); | |
| 73 if (newBlendMode == m_blendMode) | |
| 74 return; | |
| 75 | |
| 76 bool hadBlendMode = m_blendMode != blink::WebBlendModeNormal; | |
| 77 m_blendMode = newBlendMode; | |
| 78 | |
| 79 RenderLayer* layer = m_renderer.layer(); | |
| 80 // Only update the flag if a blend mode is set or unset. | |
| 81 if (layer->parent() && (!hadBlendMode || !hasBlendMode())) | |
| 82 layer->parent()->blendInfo().dirtyAncestorChainBlendedDescendantStatus()
; | |
| 83 | |
| 84 if (layer->hasCompositedLayerMapping()) | |
| 85 layer->compositedLayerMapping()->setBlendMode(newBlendMode); | |
| 86 } | |
| 87 | |
| 88 void RenderLayerBlendInfo::dirtyAncestorChainBlendedDescendantStatus() | |
| 89 { | |
| 90 for (RenderLayer* layer = m_renderer.layer(); layer; layer = layer->parent()
) { | |
| 91 if (layer->blendInfo().childLayerHasBlendModeStatusDirty()) | |
| 92 break; | |
| 93 | |
| 94 layer->blendInfo().setChildLayerHasBlendModeStatusDirty(true); | |
| 95 | |
| 96 if (layer->stackingNode()->isStackingContext()) | |
| 97 break; | |
| 98 } | |
| 99 } | |
| 100 | |
| 101 void RenderLayerBlendInfo::setAncestorChainBlendedDescendant() | |
| 102 { | |
| 103 for (RenderLayer* layer = m_renderer.layer(); layer; layer = layer->parent()
) { | |
| 104 if (!layer->blendInfo().childLayerHasBlendModeStatusDirty() && layer->bl
endInfo().childLayerHasBlendMode()) | |
| 105 break; | |
| 106 | |
| 107 layer->blendInfo().setChildLayerHasBlendMode(true); | |
| 108 layer->blendInfo().setChildLayerHasBlendModeStatusDirty(false); | |
| 109 | |
| 110 if (layer->stackingNode()->isStackingContext()) | |
| 111 break; | |
| 112 } | |
| 113 } | |
| 114 | |
| 115 } // namespace blink | |
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Chromium Code Reviews
Issue 466193002:
Disentangle blend mode from updateDescendantDependentFlags (Closed)
Base URL: svn://svn.chromium.org/blink/trunk