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1 /* | 1 /* |
2 * Copyright (C) 2003, 2009, 2012 Apple Inc. All rights reserved. | 2 * Copyright (C) 2003, 2009, 2012 Apple Inc. All rights reserved. |
3 * Copyright (C) 2013 Intel Corporation. All rights reserved. | 3 * Copyright (C) 2013 Intel Corporation. All rights reserved. |
4 * | 4 * |
5 * Portions are Copyright (C) 1998 Netscape Communications Corporation. | 5 * Portions are Copyright (C) 1998 Netscape Communications Corporation. |
6 * | 6 * |
7 * Other contributors: | 7 * Other contributors: |
8 * Robert O'Callahan <roc+@cs.cmu.edu> | 8 * Robert O'Callahan <roc+@cs.cmu.edu> |
9 * David Baron <dbaron@fas.harvard.edu> | 9 * David Baron <dbaron@fas.harvard.edu> |
10 * Christian Biesinger <cbiesinger@web.de> | 10 * Christian Biesinger <cbiesinger@web.de> |
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420 | 420 |
421 // This returns true if our document is in a phase of its lifestyle during w
hich | 421 // This returns true if our document is in a phase of its lifestyle during w
hich |
422 // compositing state may legally be read. | 422 // compositing state may legally be read. |
423 bool isAllowedToQueryCompositingState() const; | 423 bool isAllowedToQueryCompositingState() const; |
424 | 424 |
425 // Don't null check this. | 425 // Don't null check this. |
426 // FIXME: Rename. | 426 // FIXME: Rename. |
427 CompositedLayerMapping* compositedLayerMapping() const; | 427 CompositedLayerMapping* compositedLayerMapping() const; |
428 GraphicsLayer* graphicsLayerBacking() const; | 428 GraphicsLayer* graphicsLayerBacking() const; |
429 GraphicsLayer* graphicsLayerBackingForScrolling() const; | 429 GraphicsLayer* graphicsLayerBackingForScrolling() const; |
| 430 // Returns true for layers with scrollable overflow which have a background |
| 431 // that can be painted into the composited scrolling contents layer (i.e. |
| 432 // the background can scroll with the content). When the background is also |
| 433 // opaque this allows us to composite the scroller even on low DPI as we can |
| 434 // draw with subpixel anti-aliasing. |
| 435 bool shouldPaintBackgroundOntoScrollingContentsLayer() const; |
430 // NOTE: If you are using hasCompositedLayerMapping to determine the state o
f compositing for this layer, | 436 // NOTE: If you are using hasCompositedLayerMapping to determine the state o
f compositing for this layer, |
431 // (and not just to do bookkeeping related to the mapping like, say, allocat
ing or deallocating a mapping), | 437 // (and not just to do bookkeeping related to the mapping like, say, allocat
ing or deallocating a mapping), |
432 // then you may have incorrect logic. Use compositingState() instead. | 438 // then you may have incorrect logic. Use compositingState() instead. |
433 // FIXME: This is identical to null checking compositedLayerMapping(), why n
ot just call that? | 439 // FIXME: This is identical to null checking compositedLayerMapping(), why n
ot just call that? |
434 bool hasCompositedLayerMapping() const { return m_rareData && m_rareData->co
mpositedLayerMapping; } | 440 bool hasCompositedLayerMapping() const { return m_rareData && m_rareData->co
mpositedLayerMapping; } |
435 void ensureCompositedLayerMapping(); | 441 void ensureCompositedLayerMapping(); |
436 void clearCompositedLayerMapping(bool layerBeingDestroyed = false); | 442 void clearCompositedLayerMapping(bool layerBeingDestroyed = false); |
437 CompositedLayerMapping* groupedMapping() const { return m_rareData ? m_rareD
ata->groupedMapping : nullptr; } | 443 CompositedLayerMapping* groupedMapping() const { return m_rareData ? m_rareD
ata->groupedMapping : nullptr; } |
438 enum SetGroupMappingOptions { | 444 enum SetGroupMappingOptions { |
439 InvalidateLayerAndRemoveFromMapping, | 445 InvalidateLayerAndRemoveFromMapping, |
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893 | 899 |
894 } // namespace blink | 900 } // namespace blink |
895 | 901 |
896 #ifndef NDEBUG | 902 #ifndef NDEBUG |
897 // Outside the WebCore namespace for ease of invocation from gdb. | 903 // Outside the WebCore namespace for ease of invocation from gdb. |
898 void showLayerTree(const blink::PaintLayer*); | 904 void showLayerTree(const blink::PaintLayer*); |
899 void showLayerTree(const blink::LayoutObject*); | 905 void showLayerTree(const blink::LayoutObject*); |
900 #endif | 906 #endif |
901 | 907 |
902 #endif // Layer_h | 908 #endif // Layer_h |
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