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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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290 bool isolate = m_owningLayer.shouldIsolateCompositedDescendants(); | 290 bool isolate = m_owningLayer.shouldIsolateCompositedDescendants(); |
291 | 291 |
292 // non stacking context layers should never isolate | 292 // non stacking context layers should never isolate |
293 ASSERT(m_owningLayer.stackingNode()->isStackingContext() || !isolate); | 293 ASSERT(m_owningLayer.stackingNode()->isStackingContext() || !isolate); |
294 | 294 |
295 m_graphicsLayer->setIsRootForIsolatedGroup(isolate); | 295 m_graphicsLayer->setIsRootForIsolatedGroup(isolate); |
296 } | 296 } |
297 | 297 |
298 void CompositedLayerMapping::updateBackgroundPaintsOntoScrollingContentsLayer() | 298 void CompositedLayerMapping::updateBackgroundPaintsOntoScrollingContentsLayer() |
299 { | 299 { |
300 bool shouldPaintOntoScrollingContentsLayer = shouldPaintBackgroundOntoScroll
ingContentsLayer(); | 300 bool shouldPaintOntoScrollingContentsLayer = m_owningLayer.shouldPaintBackgr
oundOntoScrollingContentsLayer(); |
301 if (shouldPaintOntoScrollingContentsLayer != backgroundPaintsOntoScrollingCo
ntentsLayer()) { | 301 if (shouldPaintOntoScrollingContentsLayer != backgroundPaintsOntoScrollingCo
ntentsLayer()) { |
302 m_backgroundPaintsOntoScrollingContentsLayer = shouldPaintOntoScrollingC
ontentsLayer; | 302 m_backgroundPaintsOntoScrollingContentsLayer = shouldPaintOntoScrollingC
ontentsLayer; |
303 // If the background is no longer painted onto the scrolling contents | 303 // If the background is no longer painted onto the scrolling contents |
304 // layer the scrolling contents layer needs to be updated. If it is | 304 // layer the scrolling contents layer needs to be updated. If it is |
305 // going to be painted onto the scrolling contents layer this update | 305 // going to be painted onto the scrolling contents layer this update |
306 // will be triggered by LayoutBoxModelObject::setBackingNeedsPaintInvali
dationInRect | 306 // will be triggered by LayoutBoxModelObject::setBackingNeedsPaintInvali
dationInRect |
307 if (hasScrollingLayer() && !shouldPaintOntoScrollingContentsLayer) | 307 if (hasScrollingLayer() && !shouldPaintOntoScrollingContentsLayer) |
308 m_scrollingContentsLayer->setNeedsDisplay(); | 308 m_scrollingContentsLayer->setNeedsDisplay(); |
309 } | 309 } |
310 } | 310 } |
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2575 if (m_squashedLayers[previousIndex].paintLayer == layerToRemove) | 2575 if (m_squashedLayers[previousIndex].paintLayer == layerToRemove) |
2576 break; | 2576 break; |
2577 } | 2577 } |
2578 if (previousIndex == indexToClear && layerToRemove->groupedMapping() == this
) { | 2578 if (previousIndex == indexToClear && layerToRemove->groupedMapping() == this
) { |
2579 compositor()->paintInvalidationOnCompositingChange(layerToRemove); | 2579 compositor()->paintInvalidationOnCompositingChange(layerToRemove); |
2580 return true; | 2580 return true; |
2581 } | 2581 } |
2582 return false; | 2582 return false; |
2583 } | 2583 } |
2584 | 2584 |
2585 bool CompositedLayerMapping::shouldPaintBackgroundOntoScrollingContentsLayer() c
onst | |
2586 { | |
2587 return !m_owningLayer.isRootLayer() | |
2588 && m_owningLayer.scrollsOverflow() | |
2589 && m_owningLayer.layoutObject()->style()->hasEntirelyLocalBackground() | |
2590 && !m_owningLayer.stackingNode()->hasNegativeZOrderList(); | |
2591 } | |
2592 | |
2593 bool CompositedLayerMapping::updateSquashingLayerAssignment(PaintLayer* squashed
Layer, size_t nextSquashedLayerIndex) | 2585 bool CompositedLayerMapping::updateSquashingLayerAssignment(PaintLayer* squashed
Layer, size_t nextSquashedLayerIndex) |
2594 { | 2586 { |
2595 GraphicsLayerPaintInfo paintInfo; | 2587 GraphicsLayerPaintInfo paintInfo; |
2596 paintInfo.paintLayer = squashedLayer; | 2588 paintInfo.paintLayer = squashedLayer; |
2597 // NOTE: composited bounds are updated elsewhere | 2589 // NOTE: composited bounds are updated elsewhere |
2598 // NOTE: offsetFromLayoutObject is updated elsewhere | 2590 // NOTE: offsetFromLayoutObject is updated elsewhere |
2599 | 2591 |
2600 // Change tracking on squashing layers: at the first sign of something chang
ed, just invalidate the layer. | 2592 // Change tracking on squashing layers: at the first sign of something chang
ed, just invalidate the layer. |
2601 // FIXME: Perhaps we can find a tighter more clever mechanism later. | 2593 // FIXME: Perhaps we can find a tighter more clever mechanism later. |
2602 if (nextSquashedLayerIndex < m_squashedLayers.size()) { | 2594 if (nextSquashedLayerIndex < m_squashedLayers.size()) { |
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2703 } else if (graphicsLayer == m_scrollingContentsLayer.get()) { | 2695 } else if (graphicsLayer == m_scrollingContentsLayer.get()) { |
2704 name = "Scrolling Contents Layer"; | 2696 name = "Scrolling Contents Layer"; |
2705 } else { | 2697 } else { |
2706 ASSERT_NOT_REACHED(); | 2698 ASSERT_NOT_REACHED(); |
2707 } | 2699 } |
2708 | 2700 |
2709 return name; | 2701 return name; |
2710 } | 2702 } |
2711 | 2703 |
2712 } // namespace blink | 2704 } // namespace blink |
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