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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 * Copyright (C) 2014 Google Inc. All rights reserved. | 3 * Copyright (C) 2014 Google Inc. All rights reserved. |
| 4 * | 4 * |
| 5 * Redistribution and use in source and binary forms, with or without | 5 * Redistribution and use in source and binary forms, with or without |
| 6 * modification, are permitted provided that the following conditions | 6 * modification, are permitted provided that the following conditions |
| 7 * are met: | 7 * are met: |
| 8 * 1. Redistributions of source code must retain the above copyright | 8 * 1. Redistributions of source code must retain the above copyright |
| 9 * notice, this list of conditions and the following disclaimer. | 9 * notice, this list of conditions and the following disclaimer. |
| 10 * 2. Redistributions in binary form must reproduce the above copyright | 10 * 2. Redistributions in binary form must reproduce the above copyright |
| 11 * notice, this list of conditions and the following disclaimer in the | 11 * notice, this list of conditions and the following disclaimer in the |
| 12 * documentation and/or other materials provided with the distribution. | 12 * documentation and/or other materials provided with the distribution. |
| 13 * | 13 * |
| 14 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY | 14 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY |
| 15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | 15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR | 17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR |
| 18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | 18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| 19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | 19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| 20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | 20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| 21 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY | 21 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| 22 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | 22 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | 24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 25 */ | 25 */ |
| 26 | 26 |
| 27 #ifndef CompositingLayerAssigner_h | 27 #ifndef CompositingLayerAssigner_h |
| 28 #define CompositingLayerAssigner_h | 28 #define CompositingLayerAssigner_h |
| 29 | 29 |
| 30 #include "core/layout/compositing/RenderLayerCompositor.h" | 30 #include "core/layout/compositing/LayerCompositor.h" |
| 31 #include "platform/geometry/IntRect.h" | 31 #include "platform/geometry/IntRect.h" |
| 32 #include "platform/geometry/LayoutPoint.h" | 32 #include "platform/geometry/LayoutPoint.h" |
| 33 | 33 |
| 34 namespace blink { | 34 namespace blink { |
| 35 | 35 |
| 36 class RenderLayer; | 36 class Layer; |
| 37 | 37 |
| 38 class CompositingLayerAssigner { | 38 class CompositingLayerAssigner { |
| 39 public: | 39 public: |
| 40 explicit CompositingLayerAssigner(RenderLayerCompositor*); | 40 explicit CompositingLayerAssigner(LayerCompositor*); |
| 41 ~CompositingLayerAssigner(); | 41 ~CompositingLayerAssigner(); |
| 42 | 42 |
| 43 void assign(RenderLayer* updateRoot, Vector<RenderLayer*>& layersNeedingPain
tInvalidation); | 43 void assign(Layer* updateRoot, Vector<Layer*>& layersNeedingPaintInvalidatio
n); |
| 44 | 44 |
| 45 bool layersChanged() const { return m_layersChanged; } | 45 bool layersChanged() const { return m_layersChanged; } |
| 46 | 46 |
| 47 // FIXME: This function should be private. We should remove the one caller | 47 // FIXME: This function should be private. We should remove the one caller |
| 48 // once we've fixed the compositing chicken/egg issues. | 48 // once we've fixed the compositing chicken/egg issues. |
| 49 CompositingStateTransitionType computeCompositedLayerUpdate(RenderLayer*); | 49 CompositingStateTransitionType computeCompositedLayerUpdate(Layer*); |
| 50 | 50 |
| 51 private: | 51 private: |
| 52 struct SquashingState { | 52 struct SquashingState { |
| 53 SquashingState() | 53 SquashingState() |
| 54 : mostRecentMapping(0) | 54 : mostRecentMapping(0) |
| 55 , hasMostRecentMapping(false) | 55 , hasMostRecentMapping(false) |
| 56 , haveAssignedBackingsToEntireSquashingLayerSubtree(false) | 56 , haveAssignedBackingsToEntireSquashingLayerSubtree(false) |
| 57 , nextSquashedLayerIndex(0) | 57 , nextSquashedLayerIndex(0) |
| 58 , totalAreaOfSquashedRects(0) { } | 58 , totalAreaOfSquashedRects(0) { } |
| 59 | 59 |
| 60 void updateSquashingStateForNewMapping(CompositedLayerMapping*, bool has
NewCompositedLayerMapping); | 60 void updateSquashingStateForNewMapping(CompositedLayerMapping*, bool has
NewCompositedLayerMapping); |
| 61 | 61 |
| 62 // The most recent composited backing that the layer should squash onto
if needed. | 62 // The most recent composited backing that the layer should squash onto
if needed. |
| 63 CompositedLayerMapping* mostRecentMapping; | 63 CompositedLayerMapping* mostRecentMapping; |
| 64 bool hasMostRecentMapping; | 64 bool hasMostRecentMapping; |
| 65 | 65 |
| 66 // Whether all RenderLayers in the stacking subtree rooted at the most r
ecent mapping's | 66 // Whether all Layers in the stacking subtree rooted at the most recent
mapping's |
| 67 // owning layer have had CompositedLayerMappings assigned. Layers cannot
squash into a | 67 // owning layer have had CompositedLayerMappings assigned. Layers cannot
squash into a |
| 68 // CompositedLayerMapping owned by a stacking ancestor, since this chang
es paint order. | 68 // CompositedLayerMapping owned by a stacking ancestor, since this chang
es paint order. |
| 69 bool haveAssignedBackingsToEntireSquashingLayerSubtree; | 69 bool haveAssignedBackingsToEntireSquashingLayerSubtree; |
| 70 | 70 |
| 71 // Counter that tracks what index the next RenderLayer would be if it ge
ts squashed to the current squashing layer. | 71 // Counter that tracks what index the next Layer would be if it gets squ
ashed to the current squashing layer. |
| 72 size_t nextSquashedLayerIndex; | 72 size_t nextSquashedLayerIndex; |
| 73 | 73 |
| 74 // The absolute bounding rect of all the squashed layers. | 74 // The absolute bounding rect of all the squashed layers. |
| 75 IntRect boundingRect; | 75 IntRect boundingRect; |
| 76 | 76 |
| 77 // This is simply the sum of the areas of the squashed rects. This can b
e very skewed if the rects overlap, | 77 // This is simply the sum of the areas of the squashed rects. This can b
e very skewed if the rects overlap, |
| 78 // but should be close enough to drive a heuristic. | 78 // but should be close enough to drive a heuristic. |
| 79 uint64_t totalAreaOfSquashedRects; | 79 uint64_t totalAreaOfSquashedRects; |
| 80 }; | 80 }; |
| 81 | 81 |
| 82 void assignLayersToBackingsInternal(RenderLayer*, SquashingState&, Vector<Re
nderLayer*>& layersNeedingPaintInvalidation); | 82 void assignLayersToBackingsInternal(Layer*, SquashingState&, Vector<Layer*>&
layersNeedingPaintInvalidation); |
| 83 void assignLayersToBackingsForReflectionLayer(RenderLayer* reflectionLayer,
Vector<RenderLayer*>& layersNeedingPaintInvalidation); | 83 void assignLayersToBackingsForReflectionLayer(Layer* reflectionLayer, Vector
<Layer*>& layersNeedingPaintInvalidation); |
| 84 CompositingReasons getReasonsPreventingSquashing(const RenderLayer*, const S
quashingState&); | 84 CompositingReasons getReasonsPreventingSquashing(const Layer*, const Squashi
ngState&); |
| 85 bool squashingWouldExceedSparsityTolerance(const RenderLayer* candidate, con
st SquashingState&); | 85 bool squashingWouldExceedSparsityTolerance(const Layer* candidate, const Squ
ashingState&); |
| 86 void updateSquashingAssignment(RenderLayer*, SquashingState&, CompositingSta
teTransitionType, Vector<RenderLayer*>& layersNeedingPaintInvalidation); | 86 void updateSquashingAssignment(Layer*, SquashingState&, CompositingStateTran
sitionType, Vector<Layer*>& layersNeedingPaintInvalidation); |
| 87 bool needsOwnBacking(const RenderLayer*) const; | 87 bool needsOwnBacking(const Layer*) const; |
| 88 | 88 |
| 89 RenderLayerCompositor* m_compositor; | 89 LayerCompositor* m_compositor; |
| 90 bool m_layersChanged; | 90 bool m_layersChanged; |
| 91 }; | 91 }; |
| 92 | 92 |
| 93 } // namespace blink | 93 } // namespace blink |
| 94 | 94 |
| 95 #endif // CompositingLayerAssigner_h | 95 #endif // CompositingLayerAssigner_h |
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