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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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292 bool isolate = m_owningLayer.shouldIsolateCompositedDescendants(); | 292 bool isolate = m_owningLayer.shouldIsolateCompositedDescendants(); |
293 | 293 |
294 // non stacking context layers should never isolate | 294 // non stacking context layers should never isolate |
295 ASSERT(m_owningLayer.stackingNode()->isStackingContext() || !isolate); | 295 ASSERT(m_owningLayer.stackingNode()->isStackingContext() || !isolate); |
296 | 296 |
297 m_graphicsLayer->setIsRootForIsolatedGroup(isolate); | 297 m_graphicsLayer->setIsRootForIsolatedGroup(isolate); |
298 } | 298 } |
299 | 299 |
300 void CompositedLayerMapping::updateBackgroundPaintsOntoScrollingContentsLayer() | 300 void CompositedLayerMapping::updateBackgroundPaintsOntoScrollingContentsLayer() |
301 { | 301 { |
302 bool shouldPaintOntoScrollingContentsLayer = shouldPaintBackgroundOntoScroll
ingContentsLayer(); | 302 bool shouldPaintOntoScrollingContentsLayer = m_owningLayer.shouldPaintBackgr
oundOntoScrollingContentsLayer(); |
303 if (shouldPaintOntoScrollingContentsLayer != backgroundPaintsOntoScrollingCo
ntentsLayer()) { | 303 if (shouldPaintOntoScrollingContentsLayer != backgroundPaintsOntoScrollingCo
ntentsLayer()) { |
304 m_backgroundPaintsOntoScrollingContentsLayer = shouldPaintOntoScrollingC
ontentsLayer; | 304 m_backgroundPaintsOntoScrollingContentsLayer = shouldPaintOntoScrollingC
ontentsLayer; |
305 // If the background is no longer painted onto the scrolling contents | 305 // If the background is no longer painted onto the scrolling contents |
306 // layer the scrolling contents layer needs to be updated. If it is | 306 // layer the scrolling contents layer needs to be updated. If it is |
307 // going to be painted onto the scrolling contents layer this update | 307 // going to be painted onto the scrolling contents layer this update |
308 // will be triggered by LayoutBoxModelObject::setBackingNeedsPaintInvali
dationInRect | 308 // will be triggered by LayoutBoxModelObject::setBackingNeedsPaintInvali
dationInRect |
309 if (hasScrollingLayer() && !shouldPaintOntoScrollingContentsLayer) | 309 if (hasScrollingLayer() && !shouldPaintOntoScrollingContentsLayer) |
310 m_scrollingContentsLayer->setNeedsDisplay(); | 310 m_scrollingContentsLayer->setNeedsDisplay(); |
311 } | 311 } |
312 } | 312 } |
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2577 if (m_squashedLayers[previousIndex].paintLayer == layerToRemove) | 2577 if (m_squashedLayers[previousIndex].paintLayer == layerToRemove) |
2578 break; | 2578 break; |
2579 } | 2579 } |
2580 if (previousIndex == indexToClear && layerToRemove->groupedMapping() == this
) { | 2580 if (previousIndex == indexToClear && layerToRemove->groupedMapping() == this
) { |
2581 compositor()->paintInvalidationOnCompositingChange(layerToRemove); | 2581 compositor()->paintInvalidationOnCompositingChange(layerToRemove); |
2582 return true; | 2582 return true; |
2583 } | 2583 } |
2584 return false; | 2584 return false; |
2585 } | 2585 } |
2586 | 2586 |
2587 bool CompositedLayerMapping::shouldPaintBackgroundOntoScrollingContentsLayer() c
onst | |
2588 { | |
2589 return !m_owningLayer.isRootLayer() | |
2590 && m_owningLayer.scrollsOverflow() | |
2591 && m_owningLayer.layoutObject()->style()->hasEntirelyLocalBackground() | |
2592 && !m_owningLayer.stackingNode()->hasNegativeZOrderList(); | |
2593 } | |
2594 | |
2595 bool CompositedLayerMapping::updateSquashingLayerAssignment(PaintLayer* squashed
Layer, size_t nextSquashedLayerIndex) | 2587 bool CompositedLayerMapping::updateSquashingLayerAssignment(PaintLayer* squashed
Layer, size_t nextSquashedLayerIndex) |
2596 { | 2588 { |
2597 GraphicsLayerPaintInfo paintInfo; | 2589 GraphicsLayerPaintInfo paintInfo; |
2598 paintInfo.paintLayer = squashedLayer; | 2590 paintInfo.paintLayer = squashedLayer; |
2599 // NOTE: composited bounds are updated elsewhere | 2591 // NOTE: composited bounds are updated elsewhere |
2600 // NOTE: offsetFromLayoutObject is updated elsewhere | 2592 // NOTE: offsetFromLayoutObject is updated elsewhere |
2601 | 2593 |
2602 // Change tracking on squashing layers: at the first sign of something chang
ed, just invalidate the layer. | 2594 // Change tracking on squashing layers: at the first sign of something chang
ed, just invalidate the layer. |
2603 // FIXME: Perhaps we can find a tighter more clever mechanism later. | 2595 // FIXME: Perhaps we can find a tighter more clever mechanism later. |
2604 if (nextSquashedLayerIndex < m_squashedLayers.size()) { | 2596 if (nextSquashedLayerIndex < m_squashedLayers.size()) { |
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2705 } else if (graphicsLayer == m_scrollingContentsLayer.get()) { | 2697 } else if (graphicsLayer == m_scrollingContentsLayer.get()) { |
2706 name = "Scrolling Contents Layer"; | 2698 name = "Scrolling Contents Layer"; |
2707 } else { | 2699 } else { |
2708 ASSERT_NOT_REACHED(); | 2700 ASSERT_NOT_REACHED(); |
2709 } | 2701 } |
2710 | 2702 |
2711 return name; | 2703 return name; |
2712 } | 2704 } |
2713 | 2705 |
2714 } // namespace blink | 2706 } // namespace blink |
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