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1 /* | 1 /* |
2 * Copyright (C) 2009, 2010, 2011 Apple Inc. All rights reserved. | 2 * Copyright (C) 2009, 2010, 2011 Apple Inc. All rights reserved. |
3 * | 3 * |
4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
5 * modification, are permitted provided that the following conditions | 5 * modification, are permitted provided that the following conditions |
6 * are met: | 6 * are met: |
7 * 1. Redistributions of source code must retain the above copyright | 7 * 1. Redistributions of source code must retain the above copyright |
8 * notice, this list of conditions and the following disclaimer. | 8 * notice, this list of conditions and the following disclaimer. |
9 * 2. Redistributions in binary form must reproduce the above copyright | 9 * 2. Redistributions in binary form must reproduce the above copyright |
10 * notice, this list of conditions and the following disclaimer in the | 10 * notice, this list of conditions and the following disclaimer in the |
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291 bool isolate = m_owningLayer.shouldIsolateCompositedDescendants(); | 291 bool isolate = m_owningLayer.shouldIsolateCompositedDescendants(); |
292 | 292 |
293 // non stacking context layers should never isolate | 293 // non stacking context layers should never isolate |
294 ASSERT(m_owningLayer.stackingNode()->isStackingContext() || !isolate); | 294 ASSERT(m_owningLayer.stackingNode()->isStackingContext() || !isolate); |
295 | 295 |
296 m_graphicsLayer->setIsRootForIsolatedGroup(isolate); | 296 m_graphicsLayer->setIsRootForIsolatedGroup(isolate); |
297 } | 297 } |
298 | 298 |
299 void CompositedLayerMapping::updateBackgroundPaintsOntoScrollingContentsLayer() | 299 void CompositedLayerMapping::updateBackgroundPaintsOntoScrollingContentsLayer() |
300 { | 300 { |
301 bool shouldPaintOntoScrollingContentsLayer = shouldPaintBackgroundOntoScroll
ingContentsLayer(); | 301 bool shouldPaintOntoScrollingContentsLayer = m_owningLayer.shouldPaintBackgr
oundOntoScrollingContentsLayer(); |
302 if (shouldPaintOntoScrollingContentsLayer != backgroundPaintsOntoScrollingCo
ntentsLayer()) { | 302 if (shouldPaintOntoScrollingContentsLayer != backgroundPaintsOntoScrollingCo
ntentsLayer()) { |
303 m_backgroundPaintsOntoScrollingContentsLayer = shouldPaintOntoScrollingC
ontentsLayer; | 303 m_backgroundPaintsOntoScrollingContentsLayer = shouldPaintOntoScrollingC
ontentsLayer; |
304 // If the background is no longer painted onto the scrolling contents | 304 // If the background is no longer painted onto the scrolling contents |
305 // layer the scrolling contents layer needs to be updated. If it is | 305 // layer the scrolling contents layer needs to be updated. If it is |
306 // going to be painted onto the scrolling contents layer this update | 306 // going to be painted onto the scrolling contents layer this update |
307 // will be triggered by LayoutBoxModelObject::setBackingNeedsPaintInvali
dationInRect | 307 // will be triggered by LayoutBoxModelObject::setBackingNeedsPaintInvali
dationInRect |
308 if (hasScrollingLayer() && !shouldPaintOntoScrollingContentsLayer) | 308 if (hasScrollingLayer() && !shouldPaintOntoScrollingContentsLayer) |
309 m_scrollingContentsLayer->setNeedsDisplay(); | 309 m_scrollingContentsLayer->setNeedsDisplay(); |
310 } | 310 } |
311 } | 311 } |
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2576 if (m_squashedLayers[previousIndex].paintLayer == layerToRemove) | 2576 if (m_squashedLayers[previousIndex].paintLayer == layerToRemove) |
2577 break; | 2577 break; |
2578 } | 2578 } |
2579 if (previousIndex == indexToClear && layerToRemove->groupedMapping() == this
) { | 2579 if (previousIndex == indexToClear && layerToRemove->groupedMapping() == this
) { |
2580 compositor()->paintInvalidationOnCompositingChange(layerToRemove); | 2580 compositor()->paintInvalidationOnCompositingChange(layerToRemove); |
2581 return true; | 2581 return true; |
2582 } | 2582 } |
2583 return false; | 2583 return false; |
2584 } | 2584 } |
2585 | 2585 |
2586 bool CompositedLayerMapping::shouldPaintBackgroundOntoScrollingContentsLayer() c
onst | |
2587 { | |
2588 return !m_owningLayer.isRootLayer() | |
2589 && m_owningLayer.scrollsOverflow() | |
2590 && m_owningLayer.layoutObject()->style()->hasEntirelyLocalBackground() | |
2591 && !m_owningLayer.stackingNode()->hasNegativeZOrderList(); | |
2592 } | |
2593 | |
2594 bool CompositedLayerMapping::updateSquashingLayerAssignment(PaintLayer* squashed
Layer, size_t nextSquashedLayerIndex) | 2586 bool CompositedLayerMapping::updateSquashingLayerAssignment(PaintLayer* squashed
Layer, size_t nextSquashedLayerIndex) |
2595 { | 2587 { |
2596 GraphicsLayerPaintInfo paintInfo; | 2588 GraphicsLayerPaintInfo paintInfo; |
2597 paintInfo.paintLayer = squashedLayer; | 2589 paintInfo.paintLayer = squashedLayer; |
2598 // NOTE: composited bounds are updated elsewhere | 2590 // NOTE: composited bounds are updated elsewhere |
2599 // NOTE: offsetFromLayoutObject is updated elsewhere | 2591 // NOTE: offsetFromLayoutObject is updated elsewhere |
2600 | 2592 |
2601 // Change tracking on squashing layers: at the first sign of something chang
ed, just invalidate the layer. | 2593 // Change tracking on squashing layers: at the first sign of something chang
ed, just invalidate the layer. |
2602 // FIXME: Perhaps we can find a tighter more clever mechanism later. | 2594 // FIXME: Perhaps we can find a tighter more clever mechanism later. |
2603 if (nextSquashedLayerIndex < m_squashedLayers.size()) { | 2595 if (nextSquashedLayerIndex < m_squashedLayers.size()) { |
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2704 } else if (graphicsLayer == m_scrollingContentsLayer.get()) { | 2696 } else if (graphicsLayer == m_scrollingContentsLayer.get()) { |
2705 name = "Scrolling Contents Layer"; | 2697 name = "Scrolling Contents Layer"; |
2706 } else { | 2698 } else { |
2707 ASSERT_NOT_REACHED(); | 2699 ASSERT_NOT_REACHED(); |
2708 } | 2700 } |
2709 | 2701 |
2710 return name; | 2702 return name; |
2711 } | 2703 } |
2712 | 2704 |
2713 } // namespace blink | 2705 } // namespace blink |
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