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1 /* | 1 /* |
2 * Copyright (C) 2009, 2010 Apple Inc. All rights reserved. | 2 * Copyright (C) 2009, 2010 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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770 { | 770 { |
771 const bool hasCompositorAnimation = m_compositingReasonFinder.requiresCompos
itingForAnimation(*layer->layoutObject()->style()); | 771 const bool hasCompositorAnimation = m_compositingReasonFinder.requiresCompos
itingForAnimation(*layer->layoutObject()->style()); |
772 return m_hasAcceleratedCompositing && (hasCompositorAnimation || !layer->sub
treeIsInvisible()) && layer->isSelfPaintingLayer() && !layer->layoutObject()->is
LayoutFlowThread(); | 772 return m_hasAcceleratedCompositing && (hasCompositorAnimation || !layer->sub
treeIsInvisible()) && layer->isSelfPaintingLayer() && !layer->layoutObject()->is
LayoutFlowThread(); |
773 } | 773 } |
774 | 774 |
775 // Return true if the given layer is a stacking context and has compositing chil
d | 775 // Return true if the given layer is a stacking context and has compositing chil
d |
776 // layers that it needs to clip. In this case we insert a clipping GraphicsLayer | 776 // layers that it needs to clip. In this case we insert a clipping GraphicsLayer |
777 // into the hierarchy between this layer and its children in the z-order hierarc
hy. | 777 // into the hierarchy between this layer and its children in the z-order hierarc
hy. |
778 bool PaintLayerCompositor::clipsCompositingDescendants(const PaintLayer* layer)
const | 778 bool PaintLayerCompositor::clipsCompositingDescendants(const PaintLayer* layer)
const |
779 { | 779 { |
780 return layer->hasCompositingDescendant() && layer->layoutObject()->hasClipOr
OverflowClip(); | 780 return layer->hasCompositingDescendant() && layer->layoutObject()->hasClipRe
latedProperty(); |
781 } | 781 } |
782 | 782 |
783 // If an element has composited negative z-index children, those children paint
in front of the | 783 // If an element has composited negative z-index children, those children paint
in front of the |
784 // layer background, so we need an extra 'contents' layer for the foreground of
the layer | 784 // layer background, so we need an extra 'contents' layer for the foreground of
the layer |
785 // object. | 785 // object. |
786 bool PaintLayerCompositor::needsContentsCompositingLayer(const PaintLayer* layer
) const | 786 bool PaintLayerCompositor::needsContentsCompositingLayer(const PaintLayer* layer
) const |
787 { | 787 { |
788 if (!layer->hasCompositingDescendant()) | 788 if (!layer->hasCompositingDescendant()) |
789 return false; | 789 return false; |
790 return layer->stackingNode()->hasNegativeZOrderList(); | 790 return layer->stackingNode()->hasNegativeZOrderList(); |
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1209 } else if (graphicsLayer == m_scrollLayer.get()) { | 1209 } else if (graphicsLayer == m_scrollLayer.get()) { |
1210 name = "Frame Scrolling Layer"; | 1210 name = "Frame Scrolling Layer"; |
1211 } else { | 1211 } else { |
1212 ASSERT_NOT_REACHED(); | 1212 ASSERT_NOT_REACHED(); |
1213 } | 1213 } |
1214 | 1214 |
1215 return name; | 1215 return name; |
1216 } | 1216 } |
1217 | 1217 |
1218 } // namespace blink | 1218 } // namespace blink |
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