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| 1 // Copyright 2014 The Chromium Authors. All rights reserved. | 1 // Copyright 2014 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #include "config.h" | 5 #include "config.h" |
| 6 #include "core/layout/compositing/CompositingReasonFinder.h" | 6 #include "core/layout/compositing/CompositingReasonFinder.h" |
| 7 | 7 |
| 8 #include "core/CSSPropertyNames.h" | 8 #include "core/CSSPropertyNames.h" |
| 9 #include "core/dom/Document.h" | 9 #include "core/dom/Document.h" |
| 10 #include "core/frame/FrameView.h" | 10 #include "core/frame/FrameView.h" |
| 11 #include "core/frame/Settings.h" | 11 #include "core/frame/Settings.h" |
| 12 #include "core/layout/compositing/RenderLayerCompositor.h" | 12 #include "core/layout/compositing/LayerCompositor.h" |
| 13 #include "core/page/Page.h" | 13 #include "core/page/Page.h" |
| 14 #include "core/rendering/RenderView.h" | 14 #include "core/rendering/RenderView.h" |
| 15 | 15 |
| 16 namespace blink { | 16 namespace blink { |
| 17 | 17 |
| 18 CompositingReasonFinder::CompositingReasonFinder(RenderView& renderView) | 18 CompositingReasonFinder::CompositingReasonFinder(RenderView& renderView) |
| 19 : m_renderView(renderView) | 19 : m_renderView(renderView) |
| 20 , m_compositingTriggers(static_cast<CompositingTriggerFlags>(AllCompositingT
riggers)) | 20 , m_compositingTriggers(static_cast<CompositingTriggerFlags>(AllCompositingT
riggers)) |
| 21 { | 21 { |
| 22 updateTriggers(); | 22 updateTriggers(); |
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| 38 { | 38 { |
| 39 return m_compositingTriggers & OverflowScrollTrigger; | 39 return m_compositingTriggers & OverflowScrollTrigger; |
| 40 } | 40 } |
| 41 | 41 |
| 42 bool CompositingReasonFinder::isMainFrame() const | 42 bool CompositingReasonFinder::isMainFrame() const |
| 43 { | 43 { |
| 44 // FIXME: LocalFrame::isMainFrame() is probably better. | 44 // FIXME: LocalFrame::isMainFrame() is probably better. |
| 45 return !m_renderView.document().ownerElement(); | 45 return !m_renderView.document().ownerElement(); |
| 46 } | 46 } |
| 47 | 47 |
| 48 CompositingReasons CompositingReasonFinder::directReasons(const RenderLayer* lay
er) const | 48 CompositingReasons CompositingReasonFinder::directReasons(const Layer* layer) co
nst |
| 49 { | 49 { |
| 50 if (RuntimeEnabledFeatures::slimmingPaintCompositorLayerizationEnabled()) | 50 if (RuntimeEnabledFeatures::slimmingPaintCompositorLayerizationEnabled()) |
| 51 return CompositingReasonNone; | 51 return CompositingReasonNone; |
| 52 | 52 |
| 53 ASSERT(potentialCompositingReasonsFromStyle(layer->renderer()) == layer->pot
entialCompositingReasonsFromStyle()); | 53 ASSERT(potentialCompositingReasonsFromStyle(layer->renderer()) == layer->pot
entialCompositingReasonsFromStyle()); |
| 54 CompositingReasons styleDeterminedDirectCompositingReasons = layer->potentia
lCompositingReasonsFromStyle() & CompositingReasonComboAllDirectStyleDeterminedR
easons; | 54 CompositingReasons styleDeterminedDirectCompositingReasons = layer->potentia
lCompositingReasonsFromStyle() & CompositingReasonComboAllDirectStyleDeterminedR
easons; |
| 55 | 55 |
| 56 // Apply optimizations for scroll-blocks-on which require comparing style be
tween objects. | 56 // Apply optimizations for scroll-blocks-on which require comparing style be
tween objects. |
| 57 if ((styleDeterminedDirectCompositingReasons & CompositingReasonScrollBlocks
On) && !requiresCompositingForScrollBlocksOn(layer->renderer())) | 57 if ((styleDeterminedDirectCompositingReasons & CompositingReasonScrollBlocks
On) && !requiresCompositingForScrollBlocksOn(layer->renderer())) |
| 58 styleDeterminedDirectCompositingReasons &= ~CompositingReasonScrollBlock
sOn; | 58 styleDeterminedDirectCompositingReasons &= ~CompositingReasonScrollBlock
sOn; |
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| 112 | 112 |
| 113 // If the implementation of createsGroup changes, we need to be aware of tha
t in this part of code. | 113 // If the implementation of createsGroup changes, we need to be aware of tha
t in this part of code. |
| 114 ASSERT((renderer->isTransparent() || renderer->hasMask() || renderer->hasFil
ter() || style->hasBlendMode()) == renderer->createsGroup()); | 114 ASSERT((renderer->isTransparent() || renderer->hasMask() || renderer->hasFil
ter() || style->hasBlendMode()) == renderer->createsGroup()); |
| 115 | 115 |
| 116 if (style->hasMask()) | 116 if (style->hasMask()) |
| 117 reasons |= CompositingReasonMaskWithCompositedDescendants; | 117 reasons |= CompositingReasonMaskWithCompositedDescendants; |
| 118 | 118 |
| 119 if (style->hasFilter()) | 119 if (style->hasFilter()) |
| 120 reasons |= CompositingReasonFilterWithCompositedDescendants; | 120 reasons |= CompositingReasonFilterWithCompositedDescendants; |
| 121 | 121 |
| 122 // See RenderLayer::updateTransform for an explanation of why we check both. | 122 // See Layer::updateTransform for an explanation of why we check both. |
| 123 if (renderer->hasTransformRelatedProperty() && style->hasTransform()) | 123 if (renderer->hasTransformRelatedProperty() && style->hasTransform()) |
| 124 reasons |= CompositingReasonTransformWithCompositedDescendants; | 124 reasons |= CompositingReasonTransformWithCompositedDescendants; |
| 125 | 125 |
| 126 if (renderer->isTransparent()) | 126 if (renderer->isTransparent()) |
| 127 reasons |= CompositingReasonOpacityWithCompositedDescendants; | 127 reasons |= CompositingReasonOpacityWithCompositedDescendants; |
| 128 | 128 |
| 129 if (style->hasBlendMode()) | 129 if (style->hasBlendMode()) |
| 130 reasons |= CompositingReasonBlendingWithCompositedDescendants; | 130 reasons |= CompositingReasonBlendingWithCompositedDescendants; |
| 131 | 131 |
| 132 if (renderer->hasReflection()) | 132 if (renderer->hasReflection()) |
| 133 reasons |= CompositingReasonReflectionWithCompositedDescendants; | 133 reasons |= CompositingReasonReflectionWithCompositedDescendants; |
| 134 | 134 |
| 135 ASSERT(!(reasons & ~CompositingReasonComboAllStyleDeterminedReasons)); | 135 ASSERT(!(reasons & ~CompositingReasonComboAllStyleDeterminedReasons)); |
| 136 return reasons; | 136 return reasons; |
| 137 } | 137 } |
| 138 | 138 |
| 139 bool CompositingReasonFinder::requiresCompositingForTransform(RenderObject* rend
erer) const | 139 bool CompositingReasonFinder::requiresCompositingForTransform(RenderObject* rend
erer) const |
| 140 { | 140 { |
| 141 // Note that we ask the renderer if it has a transform, because the style ma
y have transforms, | 141 // Note that we ask the renderer if it has a transform, because the style ma
y have transforms, |
| 142 // but the renderer may be an inline that doesn't support them. | 142 // but the renderer may be an inline that doesn't support them. |
| 143 return renderer->hasTransformRelatedProperty() && renderer->style()->transfo
rm().has3DOperation(); | 143 return renderer->hasTransformRelatedProperty() && renderer->style()->transfo
rm().has3DOperation(); |
| 144 } | 144 } |
| 145 | 145 |
| 146 CompositingReasons CompositingReasonFinder::nonStyleDeterminedDirectReasons(cons
t RenderLayer* layer) const | 146 CompositingReasons CompositingReasonFinder::nonStyleDeterminedDirectReasons(cons
t Layer* layer) const |
| 147 { | 147 { |
| 148 CompositingReasons directReasons = CompositingReasonNone; | 148 CompositingReasons directReasons = CompositingReasonNone; |
| 149 RenderObject* renderer = layer->renderer(); | 149 RenderObject* renderer = layer->renderer(); |
| 150 | 150 |
| 151 if (hasOverflowScrollTrigger()) { | 151 if (hasOverflowScrollTrigger()) { |
| 152 if (layer->clipParent()) | 152 if (layer->clipParent()) |
| 153 directReasons |= CompositingReasonOutOfFlowClipping; | 153 directReasons |= CompositingReasonOutOfFlowClipping; |
| 154 | 154 |
| 155 if (const RenderLayer* scrollingAncestor = layer->ancestorScrollingLayer
()) { | 155 if (const Layer* scrollingAncestor = layer->ancestorScrollingLayer()) { |
| 156 if (scrollingAncestor->needsCompositedScrolling() && layer->scrollPa
rent()) | 156 if (scrollingAncestor->needsCompositedScrolling() && layer->scrollPa
rent()) |
| 157 directReasons |= CompositingReasonOverflowScrollingParent; | 157 directReasons |= CompositingReasonOverflowScrollingParent; |
| 158 } | 158 } |
| 159 | 159 |
| 160 if (layer->needsCompositedScrolling()) | 160 if (layer->needsCompositedScrolling()) |
| 161 directReasons |= CompositingReasonOverflowScrollingTouch; | 161 directReasons |= CompositingReasonOverflowScrollingTouch; |
| 162 } | 162 } |
| 163 | 163 |
| 164 if (requiresCompositingForPositionFixed(layer)) | 164 if (requiresCompositingForPositionFixed(layer)) |
| 165 directReasons |= CompositingReasonPositionFixed; | 165 directReasons |= CompositingReasonPositionFixed; |
| 166 | 166 |
| 167 directReasons |= renderer->additionalCompositingReasons(); | 167 directReasons |= renderer->additionalCompositingReasons(); |
| 168 | 168 |
| 169 ASSERT(!(directReasons & CompositingReasonComboAllStyleDeterminedReasons)); | 169 ASSERT(!(directReasons & CompositingReasonComboAllStyleDeterminedReasons)); |
| 170 return directReasons; | 170 return directReasons; |
| 171 } | 171 } |
| 172 | 172 |
| 173 bool CompositingReasonFinder::requiresCompositingForAnimation(RenderStyle* style
) const | 173 bool CompositingReasonFinder::requiresCompositingForAnimation(RenderStyle* style
) const |
| 174 { | 174 { |
| 175 if (style->subtreeWillChangeContents()) | 175 if (style->subtreeWillChangeContents()) |
| 176 return style->isRunningAnimationOnCompositor(); | 176 return style->isRunningAnimationOnCompositor(); |
| 177 | 177 |
| 178 return style->shouldCompositeForCurrentAnimations(); | 178 return style->shouldCompositeForCurrentAnimations(); |
| 179 } | 179 } |
| 180 | 180 |
| 181 bool CompositingReasonFinder::requiresCompositingForPositionFixed(const RenderLa
yer* layer) const | 181 bool CompositingReasonFinder::requiresCompositingForPositionFixed(const Layer* l
ayer) const |
| 182 { | 182 { |
| 183 if (!(m_compositingTriggers & ViewportConstrainedPositionedTrigger)) | 183 if (!(m_compositingTriggers & ViewportConstrainedPositionedTrigger)) |
| 184 return false; | 184 return false; |
| 185 // Don't promote fixed position elements that are descendants of a non-view
container, e.g. transformed elements. | 185 // Don't promote fixed position elements that are descendants of a non-view
container, e.g. transformed elements. |
| 186 // They will stay fixed wrt the container rather than the enclosing frame. | 186 // They will stay fixed wrt the container rather than the enclosing frame. |
| 187 return layer->scrollsWithViewport() && m_renderView.frameView()->isScrollabl
e(); | 187 return layer->scrollsWithViewport() && m_renderView.frameView()->isScrollabl
e(); |
| 188 } | 188 } |
| 189 | 189 |
| 190 bool CompositingReasonFinder::requiresCompositingForScrollBlocksOn(const RenderO
bject* renderer) const | 190 bool CompositingReasonFinder::requiresCompositingForScrollBlocksOn(const RenderO
bject* renderer) const |
| 191 { | 191 { |
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| 224 // Either way, we don't need to require compositing for scroll block
s on. This avoids | 224 // Either way, we don't need to require compositing for scroll block
s on. This avoids |
| 225 // enabling compositing by default, and avoids cluttering the root l
ayers compositing reasons. | 225 // enabling compositing by default, and avoids cluttering the root l
ayers compositing reasons. |
| 226 return false; | 226 return false; |
| 227 } | 227 } |
| 228 } | 228 } |
| 229 | 229 |
| 230 return true; | 230 return true; |
| 231 } | 231 } |
| 232 | 232 |
| 233 } | 233 } |
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