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1 /* | 1 /* |
2 * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights
reserved. | 2 * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights
reserved. |
3 * | 3 * |
4 * Portions are Copyright (C) 1998 Netscape Communications Corporation. | 4 * Portions are Copyright (C) 1998 Netscape Communications Corporation. |
5 * | 5 * |
6 * Other contributors: | 6 * Other contributors: |
7 * Robert O'Callahan <roc+@cs.cmu.edu> | 7 * Robert O'Callahan <roc+@cs.cmu.edu> |
8 * David Baron <dbaron@fas.harvard.edu> | 8 * David Baron <dbaron@fas.harvard.edu> |
9 * Christian Biesinger <cbiesinger@web.de> | 9 * Christian Biesinger <cbiesinger@web.de> |
10 * Randall Jesup <rjesup@wgate.com> | 10 * Randall Jesup <rjesup@wgate.com> |
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1395 // Note, the z-order lists may need to be rebuilt, but our code guarante
es | 1395 // Note, the z-order lists may need to be rebuilt, but our code guarante
es |
1396 // that we have not affected stacking, so we will not dirty | 1396 // that we have not affected stacking, so we will not dirty |
1397 // m_descendantsAreContiguousInStackingOrder for either us or our stacki
ng | 1397 // m_descendantsAreContiguousInStackingOrder for either us or our stacki
ng |
1398 // context or container. | 1398 // context or container. |
1399 layer()->didUpdateNeedsCompositedScrolling(); | 1399 layer()->didUpdateNeedsCompositedScrolling(); |
1400 } | 1400 } |
1401 } | 1401 } |
1402 | 1402 |
1403 bool RenderLayerScrollableArea::setNeedsCompositedScrolling(bool needsComposited
Scrolling) | 1403 bool RenderLayerScrollableArea::setNeedsCompositedScrolling(bool needsComposited
Scrolling) |
1404 { | 1404 { |
1405 if (this->needsCompositedScrolling() == needsCompositedScrolling) | 1405 if (m_needsCompositedScrolling == needsCompositedScrolling) |
1406 return false; | 1406 return false; |
1407 | 1407 |
1408 // Count the total number of RenderLayers which need composited scrolling at | 1408 // Count the total number of RenderLayers which need composited scrolling at |
1409 // some point. This should be recorded at most once per RenderLayer, so we | 1409 // some point. This should be recorded at most once per RenderLayer, so we |
1410 // check m_willUseCompositedScrollingHasBeenRecorded. | 1410 // check m_willUseCompositedScrollingHasBeenRecorded. |
1411 if (layer()->acceleratedCompositingForOverflowScrollEnabled() && !m_willUseC
ompositedScrollingHasBeenRecorded) { | 1411 if (layer()->acceleratedCompositingForOverflowScrollEnabled() && !m_willUseC
ompositedScrollingHasBeenRecorded) { |
1412 blink::Platform::current()->histogramEnumeration("Renderer.CompositedScr
olling", RenderLayer::WillUseCompositedScrollingBucket, RenderLayer::CompositedS
crollingHistogramMax); | 1412 blink::Platform::current()->histogramEnumeration("Renderer.CompositedScr
olling", RenderLayer::WillUseCompositedScrollingBucket, RenderLayer::CompositedS
crollingHistogramMax); |
1413 m_willUseCompositedScrollingHasBeenRecorded = true; | 1413 m_willUseCompositedScrollingHasBeenRecorded = true; |
1414 } | 1414 } |
1415 | 1415 |
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1469 void RenderLayerScrollableArea::setForceNeedsCompositedScrolling(ForceNeedsCompo
sitedScrollingMode mode) | 1469 void RenderLayerScrollableArea::setForceNeedsCompositedScrolling(ForceNeedsCompo
sitedScrollingMode mode) |
1470 { | 1470 { |
1471 if (m_forceNeedsCompositedScrolling == mode) | 1471 if (m_forceNeedsCompositedScrolling == mode) |
1472 return; | 1472 return; |
1473 | 1473 |
1474 m_forceNeedsCompositedScrolling = mode; | 1474 m_forceNeedsCompositedScrolling = mode; |
1475 layer()->didUpdateNeedsCompositedScrolling(); | 1475 layer()->didUpdateNeedsCompositedScrolling(); |
1476 } | 1476 } |
1477 | 1477 |
1478 } // Namespace WebCore | 1478 } // Namespace WebCore |
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