| /* |
| * Copyright (C) 2003, 2009, 2012 Apple Inc. All rights reserved. |
| * Copyright (C) 2013 Intel Corporation. All rights reserved. |
| * |
| * Portions are Copyright (C) 1998 Netscape Communications Corporation. |
| * |
| * Other contributors: |
| * Robert O'Callahan <roc+@cs.cmu.edu> |
| * David Baron <dbaron@fas.harvard.edu> |
| * Christian Biesinger <cbiesinger@web.de> |
| * Randall Jesup <rjesup@wgate.com> |
| * Roland Mainz <roland.mainz@informatik.med.uni-giessen.de> |
| * Josh Soref <timeless@mac.com> |
| * Boris Zbarsky <bzbarsky@mit.edu> |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with this library; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| * |
| * Alternatively, the contents of this file may be used under the terms |
| * of either the Mozilla Public License Version 1.1, found at |
| * http://www.mozilla.org/MPL/ (the "MPL") or the GNU General Public |
| * License Version 2.0, found at http://www.fsf.org/copyleft/gpl.html |
| * (the "GPL"), in which case the provisions of the MPL or the GPL are |
| * applicable instead of those above. If you wish to allow use of your |
| * version of this file only under the terms of one of those two |
| * licenses (the MPL or the GPL) and not to allow others to use your |
| * version of this file under the LGPL, indicate your decision by |
| * deletingthe provisions above and replace them with the notice and |
| * other provisions required by the MPL or the GPL, as the case may be. |
| * If you do not delete the provisions above, a recipient may use your |
| * version of this file under any of the LGPL, the MPL or the GPL. |
| */ |
| |
| #ifndef RenderLayer_h |
| #define RenderLayer_h |
| |
| #include "core/rendering/LayerFragment.h" |
| #include "core/rendering/LayerPaintingInfo.h" |
| #include "core/rendering/RenderBox.h" |
| #include "core/rendering/RenderLayerClipper.h" |
| #include "core/rendering/RenderLayerFilterInfo.h" |
| #include "core/rendering/RenderLayerReflectionInfo.h" |
| #include "core/rendering/RenderLayerRepainter.h" |
| #include "core/rendering/RenderLayerScrollableArea.h" |
| #include "core/rendering/RenderLayerStackingNode.h" |
| #include "core/rendering/RenderLayerStackingNodeIterator.h" |
| #include "platform/graphics/CompositingReasons.h" |
| #include "public/platform/WebBlendMode.h" |
| #include "wtf/OwnPtr.h" |
| |
| namespace blink { |
| |
| class FilterEffectRenderer; |
| class FilterOperations; |
| class HitTestRequest; |
| class HitTestResult; |
| class HitTestingTransformState; |
| class CompositedLayerMapping; |
| class RenderLayerCompositor; |
| class RenderStyle; |
| class TransformationMatrix; |
| |
| enum BorderRadiusClippingRule { IncludeSelfForBorderRadius, DoNotIncludeSelfForBorderRadius }; |
| enum IncludeSelfOrNot { IncludeSelf, ExcludeSelf }; |
| |
| enum CompositingQueryMode { |
| CompositingQueriesAreAllowed, |
| CompositingQueriesAreOnlyAllowedInCertainDocumentLifecyclePhases |
| }; |
| |
| // FIXME: remove this once the compositing query ASSERTS are no longer hit. |
| class DisableCompositingQueryAsserts { |
| WTF_MAKE_NONCOPYABLE(DisableCompositingQueryAsserts); |
| public: |
| DisableCompositingQueryAsserts(); |
| private: |
| TemporaryChange<CompositingQueryMode> m_disabler; |
| }; |
| |
| class RenderLayer { |
| WTF_MAKE_NONCOPYABLE(RenderLayer); |
| public: |
| RenderLayer(RenderLayerModelObject*, LayerType); |
| ~RenderLayer(); |
| |
| String debugName() const; |
| |
| RenderLayerModelObject* renderer() const { return m_renderer; } |
| RenderBox* renderBox() const { return m_renderer && m_renderer->isBox() ? toRenderBox(m_renderer) : 0; } |
| RenderLayer* parent() const { return m_parent; } |
| RenderLayer* previousSibling() const { return m_previous; } |
| RenderLayer* nextSibling() const { return m_next; } |
| RenderLayer* firstChild() const { return m_first; } |
| RenderLayer* lastChild() const { return m_last; } |
| |
| const RenderLayer* compositingContainer() const; |
| |
| void addChild(RenderLayer* newChild, RenderLayer* beforeChild = 0); |
| RenderLayer* removeChild(RenderLayer*); |
| |
| void removeOnlyThisLayer(); |
| void insertOnlyThisLayer(); |
| |
| void styleChanged(StyleDifference, const RenderStyle* oldStyle); |
| |
| // FIXME: Many people call this function while it has out-of-date information. |
| bool isSelfPaintingLayer() const { return m_isSelfPaintingLayer; } |
| |
| void setLayerType(LayerType layerType) { m_layerType = layerType; } |
| |
| bool isTransparent() const { return renderer()->isTransparent() || renderer()->hasMask(); } |
| RenderLayer* transparentPaintingAncestor(); |
| void beginTransparencyLayers(GraphicsContext*, const RenderLayer* rootLayer, const LayoutRect& paintDirtyRect, const LayoutSize& subPixelAccumulation, PaintBehavior); |
| |
| bool isReflection() const { return renderer()->isReplica(); } |
| RenderLayerReflectionInfo* reflectionInfo() { return m_reflectionInfo.get(); } |
| const RenderLayerReflectionInfo* reflectionInfo() const { return m_reflectionInfo.get(); } |
| |
| const RenderLayer* root() const |
| { |
| const RenderLayer* curr = this; |
| while (curr->parent()) |
| curr = curr->parent(); |
| return curr; |
| } |
| |
| LayoutPoint location() const; |
| IntSize size() const; |
| |
| LayoutRect rect() const { return LayoutRect(location(), size()); } |
| |
| bool isRootLayer() const { return m_isRootLayer; } |
| |
| RenderLayerCompositor* compositor() const; |
| |
| // Notification from the renderer that its content changed (e.g. current frame of image changed). |
| // Allows updates of layer content without invalidating paint. |
| void contentChanged(ContentChangeType); |
| |
| void updateLayerPositionsAfterLayout(); |
| |
| bool isPaginated() const { return m_isPaginated; } |
| RenderLayer* enclosingPaginationLayer() const { return m_enclosingPaginationLayer; } |
| |
| void updateTransformationMatrix(); |
| RenderLayer* renderingContextRoot(); |
| |
| // Our current relative position offset. |
| const LayoutSize offsetForInFlowPosition() const; |
| |
| void blockSelectionGapsBoundsChanged(); |
| void addBlockSelectionGapsBounds(const LayoutRect&); |
| void clearBlockSelectionGapsBounds(); |
| void invalidatePaintForBlockSelectionGaps(); |
| IntRect blockSelectionGapsBounds() const; |
| bool hasBlockSelectionGapBounds() const; |
| |
| RenderLayerStackingNode* stackingNode() { return m_stackingNode.get(); } |
| const RenderLayerStackingNode* stackingNode() const { return m_stackingNode.get(); } |
| |
| bool subtreeIsInvisible() const { return !hasVisibleContent() && !hasVisibleDescendant(); } |
| |
| // FIXME: hasVisibleContent() should call updateDescendantDependentFlags() if m_visibleContentStatusDirty. |
| bool hasVisibleContent() const { ASSERT(!m_visibleContentStatusDirty); return m_hasVisibleContent; } |
| |
| // FIXME: hasVisibleDescendant() should call updateDescendantDependentFlags() if m_visibleDescendantStatusDirty. |
| bool hasVisibleDescendant() const { ASSERT(!m_visibleDescendantStatusDirty); return m_hasVisibleDescendant; } |
| |
| void dirtyVisibleContentStatus(); |
| void potentiallyDirtyVisibleContentStatus(EVisibility); |
| |
| bool hasBoxDecorationsOrBackground() const; |
| bool hasVisibleBoxDecorations() const; |
| // Returns true if this layer has visible content (ignoring any child layers). |
| bool isVisuallyNonEmpty() const; |
| // True if this layer container renderers that paint. |
| bool hasNonEmptyChildRenderers() const; |
| |
| // Will ensure that hasNonCompositiedChild are up to date. |
| void updateScrollingStateAfterCompositingChange(); |
| bool hasVisibleNonLayerContent() const { return m_hasVisibleNonLayerContent; } |
| bool hasNonCompositedChild() const { ASSERT(isAllowedToQueryCompositingState()); return m_hasNonCompositedChild; } |
| |
| bool usedTransparency() const { return m_usedTransparency; } |
| |
| // Gets the nearest enclosing positioned ancestor layer (also includes |
| // the <html> layer and the root layer). |
| RenderLayer* enclosingPositionedAncestor() const; |
| |
| RenderLayer* enclosingOverflowClipLayer(IncludeSelfOrNot = IncludeSelf) const; |
| |
| bool isPaintInvalidationContainer() const; |
| |
| // Do *not* call this method unless you know what you are dooing. You probably want to call enclosingCompositingLayerForPaintInvalidation() instead. |
| // If includeSelf is true, may return this. |
| RenderLayer* enclosingLayerWithCompositedLayerMapping(IncludeSelfOrNot) const; |
| |
| // Returns the enclosing layer root into which this layer paints, inclusive of this one. Note that the enclosing layer may or may not have its own |
| // GraphicsLayer backing, but is nevertheless the root for a call to the RenderLayer::paint*() methods. |
| RenderLayer* enclosingLayerForPaintInvalidation() const; |
| |
| RenderLayer* enclosingLayerForPaintInvalidationCrossingFrameBoundaries() const; |
| |
| RenderLayer* enclosingFilterLayer(IncludeSelfOrNot = IncludeSelf) const; |
| bool hasAncestorWithFilterOutsets() const; |
| |
| bool canUseConvertToLayerCoords() const |
| { |
| // These RenderObjects have an impact on their layers without the renderers knowing about it. |
| return !renderer()->hasColumns() && !renderer()->hasTransform() && !renderer()->isSVGRoot(); |
| } |
| |
| void convertToLayerCoords(const RenderLayer* ancestorLayer, LayoutPoint&) const; |
| void convertToLayerCoords(const RenderLayer* ancestorLayer, LayoutRect&) const; |
| |
| // The two main functions that use the layer system. The paint method |
| // paints the layers that intersect the damage rect from back to |
| // front. The hitTest method looks for mouse events by walking |
| // layers that intersect the point from front to back. |
| // paint() assumes that the caller will clip to the bounds of damageRect if necessary. |
| void paint(GraphicsContext*, const LayoutRect& damageRect, PaintBehavior = PaintBehaviorNormal, RenderObject* paintingRoot = 0, PaintLayerFlags = 0); |
| bool hitTest(const HitTestRequest&, HitTestResult&); |
| bool hitTest(const HitTestRequest&, const HitTestLocation&, HitTestResult&); |
| void paintOverlayScrollbars(GraphicsContext*, const LayoutRect& damageRect, PaintBehavior, RenderObject* paintingRoot = 0); |
| |
| // Pass offsetFromRoot if known. |
| bool intersectsDamageRect(const LayoutRect& layerBounds, const LayoutRect& damageRect, const RenderLayer* rootLayer, const LayoutPoint* offsetFromRoot = 0) const; |
| |
| // Bounding box relative to some ancestor layer. Pass offsetFromRoot if known. |
| LayoutRect physicalBoundingBox(const RenderLayer* ancestorLayer, const LayoutPoint* offsetFromRoot = 0) const; |
| LayoutRect physicalBoundingBoxIncludingReflectionAndStackingChildren(const RenderLayer* ancestorLayer, const LayoutPoint& offsetFromRoot) const; |
| |
| // FIXME: This function is inconsistent as to whether the returned rect has been flipped for writing mode. |
| LayoutRect boundingBoxForCompositingOverlapTest() const { return overlapBoundsIncludeChildren() ? boundingBoxForCompositing() : logicalBoundingBox(); } |
| |
| // If true, this layer's children are included in its bounds for overlap testing. |
| // We can't rely on the children's positions if this layer has a filter that could have moved the children's pixels around. |
| bool overlapBoundsIncludeChildren() const { return hasFilter() && renderer()->style()->filter().hasFilterThatMovesPixels(); } |
| |
| enum CalculateBoundsOptions { |
| ApplyBoundsChickenEggHacks, |
| DoNotApplyBoundsChickenEggHacks, |
| }; |
| LayoutRect boundingBoxForCompositing(const RenderLayer* ancestorLayer = 0, CalculateBoundsOptions = DoNotApplyBoundsChickenEggHacks) const; |
| |
| LayoutUnit staticInlinePosition() const { return m_staticInlinePosition; } |
| LayoutUnit staticBlockPosition() const { return m_staticBlockPosition; } |
| |
| void setStaticInlinePosition(LayoutUnit position) { m_staticInlinePosition = position; } |
| void setStaticBlockPosition(LayoutUnit position) { m_staticBlockPosition = position; } |
| |
| LayoutSize subpixelAccumulation() const; |
| void setSubpixelAccumulation(const LayoutSize&); |
| |
| bool hasTransform() const { return renderer()->hasTransform(); } |
| // Note that this transform has the transform-origin baked in. |
| TransformationMatrix* transform() const { return m_transform.get(); } |
| // currentTransform computes a transform which takes accelerated animations into account. The |
| // resulting transform has transform-origin baked in. If the layer does not have a transform, |
| // returns the identity matrix. |
| TransformationMatrix currentTransform(RenderStyle::ApplyTransformOrigin = RenderStyle::IncludeTransformOrigin) const; |
| TransformationMatrix renderableTransform(PaintBehavior) const; |
| |
| // Get the perspective transform, which is applied to transformed sublayers. |
| // Returns true if the layer has a -webkit-perspective. |
| // Note that this transform has the perspective-origin baked in. |
| TransformationMatrix perspectiveTransform() const; |
| FloatPoint perspectiveOrigin() const; |
| bool preserves3D() const { return renderer()->style()->transformStyle3D() == TransformStyle3DPreserve3D; } |
| bool has3DTransform() const { return m_transform && !m_transform->isAffine(); } |
| |
| // FIXME: reflections should force transform-style to be flat in the style: https://bugs.webkit.org/show_bug.cgi?id=106959 |
| bool shouldPreserve3D() const { return !renderer()->hasReflection() && renderer()->style()->transformStyle3D() == TransformStyle3DPreserve3D; } |
| |
| void filterNeedsPaintInvalidation(); |
| bool hasFilter() const { return renderer()->hasFilter(); } |
| |
| bool paintsWithBlendMode() const; |
| |
| void* operator new(size_t); |
| // Only safe to call from RenderLayerModelObject::destroyLayer() |
| void operator delete(void*); |
| |
| CompositingState compositingState() const; |
| |
| // This returns true if our document is in a phase of its lifestyle during which |
| // compositing state may legally be read. |
| bool isAllowedToQueryCompositingState() const; |
| |
| // Don't null check this. |
| CompositedLayerMapping* compositedLayerMapping() const; |
| // FIXME: This should return a reference. |
| CompositedLayerMapping* ensureCompositedLayerMapping(); |
| GraphicsLayer* graphicsLayerBacking() const; |
| GraphicsLayer* graphicsLayerBackingForScrolling() const; |
| // NOTE: If you are using hasCompositedLayerMapping to determine the state of compositing for this layer, |
| // (and not just to do bookkeeping related to the mapping like, say, allocating or deallocating a mapping), |
| // then you may have incorrect logic. Use compositingState() instead. |
| // FIXME: This is identical to null checking compositedLayerMapping(), why not just call that? |
| bool hasCompositedLayerMapping() const { return m_compositedLayerMapping.get(); } |
| void clearCompositedLayerMapping(bool layerBeingDestroyed = false); |
| CompositedLayerMapping* groupedMapping() const { return m_groupedMapping; } |
| void setGroupedMapping(CompositedLayerMapping* groupedMapping, bool layerBeingDestroyed = false); |
| |
| bool hasCompositedMask() const; |
| bool hasCompositedClippingMask() const; |
| bool needsCompositedScrolling() const { return m_scrollableArea && m_scrollableArea->needsCompositedScrolling(); } |
| |
| bool clipsCompositingDescendantsWithBorderRadius() const; |
| |
| // Computes the position of the given render object in the space of |paintInvalidationContainer|. |
| // FIXME: invert the logic to have paint invalidation containers take care of painting objects into them, rather than the reverse. |
| // This will allow us to clean up this static method messiness. |
| static LayoutPoint positionFromPaintInvalidationContainer(const RenderObject*, const RenderLayerModelObject* paintInvalidationContainer, const PaintInvalidationState* = 0); |
| |
| static void mapRectToPaintBackingCoordinates(const RenderLayerModelObject* paintInvalidationContainer, LayoutRect&); |
| |
| // Adjusts the given rect (in the coordinate space of the RenderObject) to the coordinate space of |paintInvalidationContainer|'s GraphicsLayer backing. |
| static void mapRectToPaintInvalidationBacking(const RenderObject*, const RenderLayerModelObject* paintInvalidationContainer, LayoutRect&, const PaintInvalidationState* = 0); |
| |
| // Computes the bounding paint invalidation rect for |renderObject|, in the coordinate space of |paintInvalidationContainer|'s GraphicsLayer backing. |
| static LayoutRect computePaintInvalidationRect(const RenderObject*, const RenderLayer* paintInvalidationContainer, const PaintInvalidationState* = 0); |
| |
| bool paintsWithTransparency(PaintBehavior paintBehavior) const |
| { |
| return isTransparent() && ((paintBehavior & PaintBehaviorFlattenCompositingLayers) || compositingState() != PaintsIntoOwnBacking); |
| } |
| |
| bool paintsWithTransform(PaintBehavior) const; |
| |
| // Returns true if background phase is painted opaque in the given rect. |
| // The query rect is given in local coordinates. |
| bool backgroundIsKnownToBeOpaqueInRect(const LayoutRect&) const; |
| |
| bool containsDirtyOverlayScrollbars() const { return m_containsDirtyOverlayScrollbars; } |
| void setContainsDirtyOverlayScrollbars(bool dirtyScrollbars) { m_containsDirtyOverlayScrollbars = dirtyScrollbars; } |
| |
| FilterOperations computeFilterOperations(const RenderStyle*); |
| bool paintsWithFilters() const; |
| bool requiresFullLayerImageForFilters() const; |
| FilterEffectRenderer* filterRenderer() const |
| { |
| RenderLayerFilterInfo* filterInfo = this->filterInfo(); |
| return filterInfo ? filterInfo->renderer() : 0; |
| } |
| |
| RenderLayerFilterInfo* filterInfo() const { return hasFilterInfo() ? RenderLayerFilterInfo::filterInfoForRenderLayer(this) : 0; } |
| RenderLayerFilterInfo* ensureFilterInfo() { return RenderLayerFilterInfo::createFilterInfoForRenderLayerIfNeeded(this); } |
| void removeFilterInfoIfNeeded() |
| { |
| if (hasFilterInfo()) |
| RenderLayerFilterInfo::removeFilterInfoForRenderLayer(this); |
| } |
| |
| bool hasFilterInfo() const { return m_hasFilterInfo; } |
| void setHasFilterInfo(bool hasFilterInfo) { m_hasFilterInfo = hasFilterInfo; } |
| |
| void updateFilters(const RenderStyle* oldStyle, const RenderStyle* newStyle); |
| |
| Node* enclosingElement() const; |
| |
| bool isInTopLayer() const; |
| |
| bool scrollsWithViewport() const; |
| bool scrollsWithRespectTo(const RenderLayer*) const; |
| |
| void addLayerHitTestRects(LayerHitTestRects&) const; |
| |
| // Compute rects only for this layer |
| void computeSelfHitTestRects(LayerHitTestRects&) const; |
| |
| // FIXME: This should probably return a ScrollableArea but a lot of internal methods are mistakenly exposed. |
| RenderLayerScrollableArea* scrollableArea() const { return m_scrollableArea.get(); } |
| RenderLayerRepainter& paintInvalidator() { return m_repainter; } |
| RenderLayerClipper& clipper() { return m_clipper; } |
| const RenderLayerClipper& clipper() const { return m_clipper; } |
| |
| inline bool isPositionedContainer() const |
| { |
| // FIXME: This is not in sync with containingBlock. |
| // RenderObject::canContainFixedPositionedObject() should probably be used |
| // instead. |
| RenderLayerModelObject* layerRenderer = renderer(); |
| return isRootLayer() || layerRenderer->isPositioned() || hasTransform(); |
| } |
| |
| // paintLayer() assumes that the caller will clip to the bounds of the painting dirty if necessary. |
| void paintLayer(GraphicsContext*, const LayerPaintingInfo&, PaintLayerFlags); |
| |
| bool scrollsOverflow() const; |
| |
| CompositingReasons potentialCompositingReasonsFromStyle() const { return m_potentialCompositingReasonsFromStyle; } |
| void setPotentialCompositingReasonsFromStyle(CompositingReasons reasons) { ASSERT(reasons == (reasons & CompositingReasonComboAllStyleDeterminedReasons)); m_potentialCompositingReasonsFromStyle = reasons; } |
| |
| bool hasStyleDeterminedDirectCompositingReasons() const { return m_potentialCompositingReasonsFromStyle & CompositingReasonComboAllDirectStyleDeterminedReasons; } |
| |
| class AncestorDependentCompositingInputs { |
| public: |
| AncestorDependentCompositingInputs() |
| : opacityAncestor(0) |
| , transformAncestor(0) |
| , filterAncestor(0) |
| , clippingContainer(0) |
| , ancestorScrollingLayer(0) |
| , scrollParent(0) |
| , clipParent(0) |
| , isUnclippedDescendant(false) |
| , hasAncestorWithClipPath(false) |
| { } |
| |
| IntRect clippedAbsoluteBoundingBox; |
| const RenderLayer* opacityAncestor; |
| const RenderLayer* transformAncestor; |
| const RenderLayer* filterAncestor; |
| const RenderObject* clippingContainer; |
| const RenderLayer* ancestorScrollingLayer; |
| |
| // A scroll parent is a compositor concept. It's only needed in blink |
| // because we need to use it as a promotion trigger. A layer has a |
| // scroll parent if neither its compositor scrolling ancestor, nor any |
| // other layer scrolled by this ancestor, is a stacking ancestor of this |
| // layer. Layers with scroll parents must be scrolled with the main |
| // scrolling layer by the compositor. |
| const RenderLayer* scrollParent; |
| |
| // A clip parent is another compositor concept that has leaked into |
| // blink so that it may be used as a promotion trigger. Layers with clip |
| // parents escape the clip of a stacking tree ancestor. The compositor |
| // needs to know about clip parents in order to circumvent its normal |
| // clipping logic. |
| const RenderLayer* clipParent; |
| |
| // The "is unclipped descendant" concept is now only being used for one |
| // purpose: when traversing the RenderLayers in stacking order, we check |
| // if we scroll wrt to these unclipped descendants. We do this to |
| // proactively promote in the same way that we do for animated layers. |
| // Since we have no idea where scrolled content will scroll to, we just |
| // assume that it can overlap the unclipped thing at some point, so we |
| // promote. But this is unfortunate. We should be able to inflate the |
| // bounds of scrolling content for overlap the same way we're doing for |
| // animation and only promote what's necessary. Once we're doing that, |
| // we won't need to use the "unclipped" concept for promotion any |
| // longer. |
| unsigned isUnclippedDescendant : 1; |
| unsigned hasAncestorWithClipPath : 1; |
| }; |
| |
| class DescendantDependentCompositingInputs { |
| public: |
| DescendantDependentCompositingInputs() |
| : hasDescendantWithClipPath(false) |
| , hasDescendantWithBlendMode(false) |
| { } |
| |
| unsigned hasDescendantWithClipPath : 1; |
| unsigned hasDescendantWithBlendMode : 1; |
| }; |
| |
| void setNeedsCompositingInputsUpdate(); |
| bool childNeedsCompositingInputsUpdate() const { return m_childNeedsCompositingInputsUpdate; } |
| bool needsCompositingInputsUpdate() const |
| { |
| // While we're updating the compositing inputs, these values may differ. |
| // We should never be asking for this value when that is the case. |
| ASSERT(m_needsDescendantDependentCompositingInputsUpdate == m_needsAncestorDependentCompositingInputsUpdate); |
| return m_needsDescendantDependentCompositingInputsUpdate; |
| } |
| |
| void updateAncestorDependentCompositingInputs(const AncestorDependentCompositingInputs&); |
| void updateDescendantDependentCompositingInputs(const DescendantDependentCompositingInputs&); |
| void didUpdateCompositingInputs(); |
| |
| const AncestorDependentCompositingInputs& ancestorDependentCompositingInputs() const { ASSERT(!m_needsAncestorDependentCompositingInputsUpdate); return m_ancestorDependentCompositingInputs; } |
| const DescendantDependentCompositingInputs& descendantDependentCompositingInputs() const { ASSERT(!m_needsDescendantDependentCompositingInputsUpdate); return m_descendantDependentCompositingInputs; } |
| |
| IntRect clippedAbsoluteBoundingBox() const { return ancestorDependentCompositingInputs().clippedAbsoluteBoundingBox; } |
| const RenderLayer* opacityAncestor() const { return ancestorDependentCompositingInputs().opacityAncestor; } |
| const RenderLayer* transformAncestor() const { return ancestorDependentCompositingInputs().transformAncestor; } |
| const RenderLayer* filterAncestor() const { return ancestorDependentCompositingInputs().filterAncestor; } |
| const RenderObject* clippingContainer() const { return ancestorDependentCompositingInputs().clippingContainer; } |
| const RenderLayer* ancestorScrollingLayer() const { return ancestorDependentCompositingInputs().ancestorScrollingLayer; } |
| RenderLayer* scrollParent() const { return const_cast<RenderLayer*>(ancestorDependentCompositingInputs().scrollParent); } |
| RenderLayer* clipParent() const { return const_cast<RenderLayer*>(ancestorDependentCompositingInputs().clipParent); } |
| bool isUnclippedDescendant() const { return ancestorDependentCompositingInputs().isUnclippedDescendant; } |
| bool hasAncestorWithClipPath() const { return ancestorDependentCompositingInputs().hasAncestorWithClipPath; } |
| bool hasDescendantWithClipPath() const { return descendantDependentCompositingInputs().hasDescendantWithClipPath; } |
| bool hasDescendantWithBlendMode() const { return descendantDependentCompositingInputs().hasDescendantWithBlendMode; } |
| |
| bool lostGroupedMapping() const { ASSERT(isAllowedToQueryCompositingState()); return m_lostGroupedMapping; } |
| void setLostGroupedMapping(bool b) { m_lostGroupedMapping = b; } |
| |
| CompositingReasons compositingReasons() const { ASSERT(isAllowedToQueryCompositingState()); return m_compositingReasons; } |
| void setCompositingReasons(CompositingReasons, CompositingReasons mask = CompositingReasonAll); |
| |
| bool hasCompositingDescendant() const { ASSERT(isAllowedToQueryCompositingState()); return m_hasCompositingDescendant; } |
| void setHasCompositingDescendant(bool); |
| |
| bool shouldIsolateCompositedDescendants() const { ASSERT(isAllowedToQueryCompositingState()); return m_shouldIsolateCompositedDescendants; } |
| void setShouldIsolateCompositedDescendants(bool); |
| |
| void updateDescendantDependentFlags(); |
| void updateDescendantDependentFlagsForEntireSubtree(); |
| |
| void updateOrRemoveFilterEffectRenderer(); |
| |
| void updateSelfPaintingLayer(); |
| |
| // paintLayerContents() assumes that the caller will clip to the bounds of the painting dirty rect if necessary. |
| void paintLayerContents(GraphicsContext*, const LayerPaintingInfo&, PaintLayerFlags); |
| |
| RenderLayer* enclosingTransformedAncestor() const; |
| LayoutPoint computeOffsetFromTransformedAncestor() const; |
| |
| void didUpdateNeedsCompositedScrolling(); |
| |
| void setShouldDoFullPaintInvalidationIncludingNonCompositingDescendants(); |
| |
| private: |
| // Bounding box in the coordinates of this layer. |
| LayoutRect logicalBoundingBox() const; |
| |
| bool hasOverflowControls() const; |
| |
| void setAncestorChainHasSelfPaintingLayerDescendant(); |
| void dirtyAncestorChainHasSelfPaintingLayerDescendantStatus(); |
| |
| void clipToRect(const LayerPaintingInfo&, GraphicsContext*, const ClipRect&, PaintLayerFlags, BorderRadiusClippingRule = IncludeSelfForBorderRadius); |
| void restoreClip(GraphicsContext*, const LayoutRect& paintDirtyRect, const ClipRect&); |
| |
| void updateLayerPositionRecursive(); |
| |
| void setNextSibling(RenderLayer* next) { m_next = next; } |
| void setPreviousSibling(RenderLayer* prev) { m_previous = prev; } |
| void setFirstChild(RenderLayer* first) { m_first = first; } |
| void setLastChild(RenderLayer* last) { m_last = last; } |
| |
| void updateHasSelfPaintingLayerDescendant() const; |
| |
| bool hasSelfPaintingLayerDescendant() const |
| { |
| if (m_hasSelfPaintingLayerDescendantDirty) |
| updateHasSelfPaintingLayerDescendant(); |
| ASSERT(!m_hasSelfPaintingLayerDescendantDirty); |
| return m_hasSelfPaintingLayerDescendant; |
| } |
| |
| LayoutPoint renderBoxLocation() const { return renderer()->isBox() ? toRenderBox(renderer())->location() : LayoutPoint(); } |
| |
| void paintLayerContentsAndReflection(GraphicsContext*, const LayerPaintingInfo&, PaintLayerFlags); |
| void paintLayerByApplyingTransform(GraphicsContext*, const LayerPaintingInfo&, PaintLayerFlags, const LayoutPoint& translationOffset = LayoutPoint()); |
| |
| // Returns whether this layer should be painted during sofware painting (i.e., not via calls from CompositedLayerMapping to draw into composited |
| // layers). |
| bool shouldPaintLayerInSoftwareMode(const LayerPaintingInfo&, PaintLayerFlags paintFlags); |
| |
| void paintChildren(unsigned childrenToVisit, GraphicsContext*, const LayerPaintingInfo&, PaintLayerFlags); |
| void paintPaginatedChildLayer(RenderLayer* childLayer, GraphicsContext*, const LayerPaintingInfo&, PaintLayerFlags); |
| void paintChildLayerIntoColumns(RenderLayer* childLayer, GraphicsContext*, const LayerPaintingInfo&, PaintLayerFlags, const Vector<RenderLayer*>& columnLayers, size_t columnIndex); |
| |
| void collectFragments(LayerFragments&, const RenderLayer* rootLayer, const LayoutRect& dirtyRect, |
| ClipRectsCacheSlot, OverlayScrollbarSizeRelevancy inOverlayScrollbarSizeRelevancy = IgnoreOverlayScrollbarSize, |
| ShouldRespectOverflowClip = RespectOverflowClip, const LayoutPoint* offsetFromRoot = 0, |
| const LayoutSize& subPixelAccumulation = LayoutSize(), const LayoutRect* layerBoundingBox = 0); |
| void updatePaintingInfoForFragments(LayerFragments&, const LayerPaintingInfo&, PaintLayerFlags, bool shouldPaintContent, const LayoutPoint* offsetFromRoot); |
| void paintBackgroundForFragments(const LayerFragments&, GraphicsContext*, GraphicsContext* transparencyLayerContext, |
| const LayoutRect& transparencyPaintDirtyRect, bool haveTransparency, const LayerPaintingInfo&, PaintBehavior, RenderObject* paintingRootForRenderer, PaintLayerFlags); |
| void paintForegroundForFragments(const LayerFragments&, GraphicsContext*, GraphicsContext* transparencyLayerContext, |
| const LayoutRect& transparencyPaintDirtyRect, bool haveTransparency, const LayerPaintingInfo&, PaintBehavior, RenderObject* paintingRootForRenderer, |
| bool selectionOnly, PaintLayerFlags); |
| void paintForegroundForFragmentsWithPhase(PaintPhase, const LayerFragments&, GraphicsContext*, const LayerPaintingInfo&, PaintBehavior, RenderObject* paintingRootForRenderer, PaintLayerFlags); |
| void paintOutlineForFragments(const LayerFragments&, GraphicsContext*, const LayerPaintingInfo&, PaintBehavior, RenderObject* paintingRootForRenderer, PaintLayerFlags); |
| void paintOverflowControlsForFragments(const LayerFragments&, GraphicsContext*, const LayerPaintingInfo&, PaintLayerFlags); |
| void paintMaskForFragments(const LayerFragments&, GraphicsContext*, const LayerPaintingInfo&, RenderObject* paintingRootForRenderer, PaintLayerFlags); |
| void paintChildClippingMaskForFragments(const LayerFragments&, GraphicsContext*, const LayerPaintingInfo&, RenderObject* paintingRootForRenderer, PaintLayerFlags); |
| void paintTransformedLayerIntoFragments(GraphicsContext*, const LayerPaintingInfo&, PaintLayerFlags); |
| |
| RenderLayer* hitTestLayer(RenderLayer* rootLayer, RenderLayer* containerLayer, const HitTestRequest& request, HitTestResult& result, |
| const LayoutRect& hitTestRect, const HitTestLocation&, bool appliedTransform, |
| const HitTestingTransformState* transformState = 0, double* zOffset = 0); |
| RenderLayer* hitTestLayerByApplyingTransform(RenderLayer* rootLayer, RenderLayer* containerLayer, const HitTestRequest&, HitTestResult&, |
| const LayoutRect& hitTestRect, const HitTestLocation&, const HitTestingTransformState* = 0, double* zOffset = 0, |
| const LayoutPoint& translationOffset = LayoutPoint()); |
| RenderLayer* hitTestChildren(ChildrenIteration, RenderLayer* rootLayer, const HitTestRequest&, HitTestResult&, |
| const LayoutRect& hitTestRect, const HitTestLocation&, |
| const HitTestingTransformState* transformState, double* zOffsetForDescendants, double* zOffset, |
| const HitTestingTransformState* unflattenedTransformState, bool depthSortDescendants); |
| RenderLayer* hitTestPaginatedChildLayer(RenderLayer* childLayer, RenderLayer* rootLayer, const HitTestRequest& request, HitTestResult& result, |
| const LayoutRect& hitTestRect, const HitTestLocation&, |
| const HitTestingTransformState* transformState, double* zOffset); |
| RenderLayer* hitTestChildLayerColumns(RenderLayer* childLayer, RenderLayer* rootLayer, const HitTestRequest& request, HitTestResult& result, |
| const LayoutRect& hitTestRect, const HitTestLocation&, |
| const HitTestingTransformState* transformState, double* zOffset, |
| const Vector<RenderLayer*>& columnLayers, size_t columnIndex); |
| |
| PassRefPtr<HitTestingTransformState> createLocalTransformState(RenderLayer* rootLayer, RenderLayer* containerLayer, |
| const LayoutRect& hitTestRect, const HitTestLocation&, |
| const HitTestingTransformState* containerTransformState, |
| const LayoutPoint& translationOffset = LayoutPoint()) const; |
| |
| bool hitTestContents(const HitTestRequest&, HitTestResult&, const LayoutRect& layerBounds, const HitTestLocation&, HitTestFilter) const; |
| bool hitTestContentsForFragments(const LayerFragments&, const HitTestRequest&, HitTestResult&, const HitTestLocation&, HitTestFilter, bool& insideClipRect) const; |
| RenderLayer* hitTestTransformedLayerInFragments(RenderLayer* rootLayer, RenderLayer* containerLayer, const HitTestRequest&, HitTestResult&, |
| const LayoutRect& hitTestRect, const HitTestLocation&, const HitTestingTransformState* = 0, double* zOffset = 0); |
| |
| bool childBackgroundIsKnownToBeOpaqueInRect(const LayoutRect&) const; |
| |
| bool shouldBeSelfPaintingLayer() const; |
| |
| // FIXME: We should only create the stacking node if needed. |
| bool requiresStackingNode() const { return true; } |
| void updateStackingNode(); |
| |
| void updateReflectionInfo(const RenderStyle*); |
| |
| // FIXME: We could lazily allocate our ScrollableArea based on style properties ('overflow', ...) |
| // but for now, we are always allocating it for RenderBox as it's safer. |
| bool requiresScrollableArea() const { return renderBox(); } |
| void updateScrollableArea(); |
| |
| void dirtyAncestorChainVisibleDescendantStatus(); |
| |
| bool attemptDirectCompositingUpdate(StyleDifference, const RenderStyle* oldStyle); |
| void updateTransform(const RenderStyle* oldStyle, RenderStyle* newStyle); |
| |
| void dirty3DTransformedDescendantStatus(); |
| // Both updates the status, and returns true if descendants of this have 3d. |
| bool update3DTransformedDescendantStatus(); |
| |
| void updateOrRemoveFilterClients(); |
| |
| LayoutRect paintingExtent(const RenderLayer* rootLayer, const LayoutRect& paintDirtyRect, const LayoutSize& subPixelAccumulation, PaintBehavior); |
| |
| void updatePaginationRecursive(bool needsPaginationUpdate = false); |
| void updatePagination(); |
| |
| // FIXME: Temporary. Remove when new columns come online. |
| bool useRegionBasedColumns() const; |
| |
| LayerType m_layerType; |
| |
| // Self-painting layer is an optimization where we avoid the heavy RenderLayer painting |
| // machinery for a RenderLayer allocated only to handle the overflow clip case. |
| // FIXME(crbug.com/332791): Self-painting layer should be merged into the overflow-only concept. |
| unsigned m_isSelfPaintingLayer : 1; |
| |
| // If have no self-painting descendants, we don't have to walk our children during painting. This can lead to |
| // significant savings, especially if the tree has lots of non-self-painting layers grouped together (e.g. table cells). |
| mutable unsigned m_hasSelfPaintingLayerDescendant : 1; |
| mutable unsigned m_hasSelfPaintingLayerDescendantDirty : 1; |
| |
| const unsigned m_isRootLayer : 1; |
| |
| unsigned m_usedTransparency : 1; // Tracks whether we need to close a transparent layer, i.e., whether |
| // we ended up painting this layer or any descendants (and therefore need to |
| // blend). |
| |
| unsigned m_visibleContentStatusDirty : 1; |
| unsigned m_hasVisibleContent : 1; |
| unsigned m_visibleDescendantStatusDirty : 1; |
| unsigned m_hasVisibleDescendant : 1; |
| |
| unsigned m_hasVisibleNonLayerContent : 1; |
| |
| unsigned m_isPaginated : 1; // If we think this layer is split by a multi-column ancestor, then this bit will be set. |
| |
| unsigned m_3DTransformedDescendantStatusDirty : 1; |
| // Set on a stacking context layer that has 3D descendants anywhere |
| // in a preserves3D hierarchy. Hint to do 3D-aware hit testing. |
| unsigned m_has3DTransformedDescendant : 1; |
| |
| unsigned m_containsDirtyOverlayScrollbars : 1; |
| |
| unsigned m_hasFilterInfo : 1; |
| unsigned m_needsAncestorDependentCompositingInputsUpdate : 1; |
| unsigned m_needsDescendantDependentCompositingInputsUpdate : 1; |
| unsigned m_childNeedsCompositingInputsUpdate : 1; |
| |
| // Used only while determining what layers should be composited. Applies to the tree of z-order lists. |
| unsigned m_hasCompositingDescendant : 1; |
| |
| // Applies to the real render layer tree (i.e., the tree determined by the layer's parent and children and |
| // as opposed to the tree formed by the z-order and normal flow lists). |
| unsigned m_hasNonCompositedChild : 1; |
| |
| // Should be for stacking contexts having unisolated blending descendants. |
| unsigned m_shouldIsolateCompositedDescendants : 1; |
| |
| // True if this render layer just lost its grouped mapping due to the CompositedLayerMapping being destroyed, |
| // and we don't yet know to what graphics layer this RenderLayer will be assigned. |
| unsigned m_lostGroupedMapping : 1; |
| |
| RenderLayerModelObject* m_renderer; |
| |
| RenderLayer* m_parent; |
| RenderLayer* m_previous; |
| RenderLayer* m_next; |
| RenderLayer* m_first; |
| RenderLayer* m_last; |
| |
| // Cached normal flow values for absolute positioned elements with static left/top values. |
| LayoutUnit m_staticInlinePosition; |
| LayoutUnit m_staticBlockPosition; |
| |
| OwnPtr<TransformationMatrix> m_transform; |
| |
| // Pointer to the enclosing RenderLayer that caused us to be paginated. It is 0 if we are not paginated. |
| RenderLayer* m_enclosingPaginationLayer; |
| |
| // These compositing reasons are updated whenever style changes, not while updating compositing layers. |
| // They should not be used to infer the compositing state of this layer. |
| CompositingReasons m_potentialCompositingReasonsFromStyle; |
| |
| // Once computed, indicates all that a layer needs to become composited using the CompositingReasons enum bitfield. |
| CompositingReasons m_compositingReasons; |
| |
| DescendantDependentCompositingInputs m_descendantDependentCompositingInputs; |
| AncestorDependentCompositingInputs m_ancestorDependentCompositingInputs; |
| |
| IntRect m_blockSelectionGapsBounds; |
| |
| OwnPtr<CompositedLayerMapping> m_compositedLayerMapping; |
| OwnPtr<RenderLayerScrollableArea> m_scrollableArea; |
| |
| CompositedLayerMapping* m_groupedMapping; |
| |
| RenderLayerRepainter m_repainter; |
| RenderLayerClipper m_clipper; // FIXME: Lazily allocate? |
| OwnPtr<RenderLayerStackingNode> m_stackingNode; |
| OwnPtrWillBePersistent<RenderLayerReflectionInfo> m_reflectionInfo; |
| |
| LayoutSize m_subpixelAccumulation; // The accumulated subpixel offset of a composited layer's composited bounds compared to absolute coordinates. |
| }; |
| |
| } // namespace blink |
| |
| #ifndef NDEBUG |
| // Outside the WebCore namespace for ease of invocation from gdb. |
| void showLayerTree(const blink::RenderLayer*); |
| void showLayerTree(const blink::RenderObject*); |
| #endif |
| |
| #endif // RenderLayer_h |