/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- * vim: set ts=2 sw=2 et tw=78: * This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ /* * structures that represent things to be painted (ordered in z-order), * used during painting and hit testing */ #include "mozilla/dom/TabChild.h" #include "mozilla/layers/PLayerTransaction.h" #include "nsDisplayList.h" #include "nsCSSRendering.h" #include "nsRenderingContext.h" #include "nsISelectionController.h" #include "nsIPresShell.h" #include "nsRegion.h" #include "nsStyleStructInlines.h" #include "nsStyleTransformMatrix.h" #include "gfxMatrix.h" #include "nsSVGIntegrationUtils.h" #include "nsLayoutUtils.h" #include "nsIScrollableFrame.h" #include "nsIFrameInlines.h" #include "nsThemeConstants.h" #include "LayerTreeInvalidation.h" #include "imgIContainer.h" #include "BasicLayers.h" #include "nsBoxFrame.h" #include "nsViewportFrame.h" #include "nsSubDocumentFrame.h" #include "nsSVGEffects.h" #include "nsSVGElement.h" #include "nsSVGClipPathFrame.h" #include "GeckoProfiler.h" #include "nsAnimationManager.h" #include "nsTransitionManager.h" #include "nsViewManager.h" #include "ImageLayers.h" #include "ImageContainer.h" #include "nsCanvasFrame.h" #include "StickyScrollContainer.h" #include "mozilla/EventStates.h" #include "mozilla/LookAndFeel.h" #include "mozilla/Preferences.h" #include "ActiveLayerTracker.h" #include "nsContentUtils.h" #include "nsPrintfCString.h" #include "UnitTransforms.h" #include "LayersLogging.h" #include #include using namespace mozilla; using namespace mozilla::css; using namespace mozilla::layers; using namespace mozilla::dom; using namespace mozilla::layout; typedef FrameMetrics::ViewID ViewID; static inline nsIFrame* GetTransformRootFrame(nsIFrame* aFrame) { return nsLayoutUtils::GetTransformRootFrame(aFrame); } static void AddTransformFunctions(nsCSSValueList* aList, nsStyleContext* aContext, nsPresContext* aPresContext, nsRect& aBounds, InfallibleTArray& aFunctions) { if (aList->mValue.GetUnit() == eCSSUnit_None) { return; } for (const nsCSSValueList* curr = aList; curr; curr = curr->mNext) { const nsCSSValue& currElem = curr->mValue; NS_ASSERTION(currElem.GetUnit() == eCSSUnit_Function, "Stream should consist solely of functions!"); nsCSSValue::Array* array = currElem.GetArrayValue(); bool canStoreInRuleTree = true; switch (nsStyleTransformMatrix::TransformFunctionOf(array)) { case eCSSKeyword_rotatex: { double theta = array->Item(1).GetAngleValueInRadians(); aFunctions.AppendElement(RotationX(theta)); break; } case eCSSKeyword_rotatey: { double theta = array->Item(1).GetAngleValueInRadians(); aFunctions.AppendElement(RotationY(theta)); break; } case eCSSKeyword_rotatez: { double theta = array->Item(1).GetAngleValueInRadians(); aFunctions.AppendElement(RotationZ(theta)); break; } case eCSSKeyword_rotate: { double theta = array->Item(1).GetAngleValueInRadians(); aFunctions.AppendElement(Rotation(theta)); break; } case eCSSKeyword_rotate3d: { double x = array->Item(1).GetFloatValue(); double y = array->Item(2).GetFloatValue(); double z = array->Item(3).GetFloatValue(); double theta = array->Item(4).GetAngleValueInRadians(); aFunctions.AppendElement(Rotation3D(x, y, z, theta)); break; } case eCSSKeyword_scalex: { double x = array->Item(1).GetFloatValue(); aFunctions.AppendElement(Scale(x, 1, 1)); break; } case eCSSKeyword_scaley: { double y = array->Item(1).GetFloatValue(); aFunctions.AppendElement(Scale(1, y, 1)); break; } case eCSSKeyword_scalez: { double z = array->Item(1).GetFloatValue(); aFunctions.AppendElement(Scale(1, 1, z)); break; } case eCSSKeyword_scale: { double x = array->Item(1).GetFloatValue(); // scale(x) is shorthand for scale(x, x); double y = array->Count() == 2 ? x : array->Item(2).GetFloatValue(); aFunctions.AppendElement(Scale(x, y, 1)); break; } case eCSSKeyword_scale3d: { double x = array->Item(1).GetFloatValue(); double y = array->Item(2).GetFloatValue(); double z = array->Item(3).GetFloatValue(); aFunctions.AppendElement(Scale(x, y, z)); break; } case eCSSKeyword_translatex: { double x = nsStyleTransformMatrix::ProcessTranslatePart( array->Item(1), aContext, aPresContext, canStoreInRuleTree, aBounds.Width()); aFunctions.AppendElement(Translation(x, 0, 0)); break; } case eCSSKeyword_translatey: { double y = nsStyleTransformMatrix::ProcessTranslatePart( array->Item(1), aContext, aPresContext, canStoreInRuleTree, aBounds.Height()); aFunctions.AppendElement(Translation(0, y, 0)); break; } case eCSSKeyword_translatez: { double z = nsStyleTransformMatrix::ProcessTranslatePart( array->Item(1), aContext, aPresContext, canStoreInRuleTree, 0); aFunctions.AppendElement(Translation(0, 0, z)); break; } case eCSSKeyword_translate: { double x = nsStyleTransformMatrix::ProcessTranslatePart( array->Item(1), aContext, aPresContext, canStoreInRuleTree, aBounds.Width()); // translate(x) is shorthand for translate(x, 0) double y = 0; if (array->Count() == 3) { y = nsStyleTransformMatrix::ProcessTranslatePart( array->Item(2), aContext, aPresContext, canStoreInRuleTree, aBounds.Height()); } aFunctions.AppendElement(Translation(x, y, 0)); break; } case eCSSKeyword_translate3d: { double x = nsStyleTransformMatrix::ProcessTranslatePart( array->Item(1), aContext, aPresContext, canStoreInRuleTree, aBounds.Width()); double y = nsStyleTransformMatrix::ProcessTranslatePart( array->Item(2), aContext, aPresContext, canStoreInRuleTree, aBounds.Height()); double z = nsStyleTransformMatrix::ProcessTranslatePart( array->Item(3), aContext, aPresContext, canStoreInRuleTree, 0); aFunctions.AppendElement(Translation(x, y, z)); break; } case eCSSKeyword_skewx: { double x = array->Item(1).GetAngleValueInRadians(); aFunctions.AppendElement(SkewX(x)); break; } case eCSSKeyword_skewy: { double y = array->Item(1).GetAngleValueInRadians(); aFunctions.AppendElement(SkewY(y)); break; } case eCSSKeyword_skew: { double x = array->Item(1).GetAngleValueInRadians(); // skew(x) is shorthand for skew(x, 0) double y = 0; if (array->Count() == 3) { y = array->Item(2).GetAngleValueInRadians(); } aFunctions.AppendElement(Skew(x, y)); break; } case eCSSKeyword_matrix: { gfx::Matrix4x4 matrix; matrix._11 = array->Item(1).GetFloatValue(); matrix._12 = array->Item(2).GetFloatValue(); matrix._13 = 0; matrix._14 = 0; matrix._21 = array->Item(3).GetFloatValue(); matrix._22 = array->Item(4).GetFloatValue(); matrix._23 = 0; matrix._24 = 0; matrix._31 = 0; matrix._32 = 0; matrix._33 = 1; matrix._34 = 0; matrix._41 = array->Item(5).GetFloatValue(); matrix._42 = array->Item(6).GetFloatValue(); matrix._43 = 0; matrix._44 = 1; aFunctions.AppendElement(TransformMatrix(matrix)); break; } case eCSSKeyword_matrix3d: { gfx::Matrix4x4 matrix; matrix._11 = array->Item(1).GetFloatValue(); matrix._12 = array->Item(2).GetFloatValue(); matrix._13 = array->Item(3).GetFloatValue(); matrix._14 = array->Item(4).GetFloatValue(); matrix._21 = array->Item(5).GetFloatValue(); matrix._22 = array->Item(6).GetFloatValue(); matrix._23 = array->Item(7).GetFloatValue(); matrix._24 = array->Item(8).GetFloatValue(); matrix._31 = array->Item(9).GetFloatValue(); matrix._32 = array->Item(10).GetFloatValue(); matrix._33 = array->Item(11).GetFloatValue(); matrix._34 = array->Item(12).GetFloatValue(); matrix._41 = array->Item(13).GetFloatValue(); matrix._42 = array->Item(14).GetFloatValue(); matrix._43 = array->Item(15).GetFloatValue(); matrix._44 = array->Item(16).GetFloatValue(); aFunctions.AppendElement(TransformMatrix(matrix)); break; } case eCSSKeyword_interpolatematrix: { gfx3DMatrix matrix; nsStyleTransformMatrix::ProcessInterpolateMatrix(matrix, array, aContext, aPresContext, canStoreInRuleTree, aBounds); gfx::Matrix4x4 transform; gfx::ToMatrix4x4(matrix, transform); aFunctions.AppendElement(TransformMatrix(transform)); break; } case eCSSKeyword_perspective: { aFunctions.AppendElement(Perspective(array->Item(1).GetFloatValue())); break; } default: NS_ERROR("Function not handled yet!"); } } } static TimingFunction ToTimingFunction(css::ComputedTimingFunction& aCTF) { if (aCTF.GetType() == nsTimingFunction::Function) { const nsSMILKeySpline* spline = aCTF.GetFunction(); return TimingFunction(CubicBezierFunction(spline->X1(), spline->Y1(), spline->X2(), spline->Y2())); } uint32_t type = aCTF.GetType() == nsTimingFunction::StepStart ? 1 : 2; return TimingFunction(StepFunction(aCTF.GetSteps(), type)); } static void AddAnimationForProperty(nsIFrame* aFrame, nsCSSProperty aProperty, mozilla::ElementAnimation* ea, Layer* aLayer, AnimationData& aData, bool aPending) { NS_ASSERTION(aLayer->AsContainerLayer(), "Should only animate ContainerLayer"); nsStyleContext* styleContext = aFrame->StyleContext(); nsPresContext* presContext = aFrame->PresContext(); nsRect bounds = nsDisplayTransform::GetFrameBoundsForTransform(aFrame); mozilla::layers::Animation* animation = aPending ? aLayer->AddAnimationForNextTransaction() : aLayer->AddAnimation(); animation->startTime() = ea->mStartTime + ea->mDelay; animation->duration() = ea->mTiming.mIterationDuration; animation->iterationCount() = ea->mTiming.mIterationCount; animation->direction() = ea->mTiming.mDirection; animation->property() = aProperty; animation->data() = aData; for (uint32_t propIdx = 0; propIdx < ea->mProperties.Length(); propIdx++) { AnimationProperty* property = &ea->mProperties[propIdx]; if (aProperty != property->mProperty) { continue; } for (uint32_t segIdx = 0; segIdx < property->mSegments.Length(); segIdx++) { AnimationPropertySegment* segment = &property->mSegments[segIdx]; AnimationSegment* animSegment = animation->segments().AppendElement(); if (aProperty == eCSSProperty_transform) { animSegment->startState() = InfallibleTArray(); animSegment->endState() = InfallibleTArray(); nsCSSValueSharedList* list = segment->mFromValue.GetCSSValueSharedListValue(); AddTransformFunctions(list->mHead, styleContext, presContext, bounds, animSegment->startState().get_ArrayOfTransformFunction()); list = segment->mToValue.GetCSSValueSharedListValue(); AddTransformFunctions(list->mHead, styleContext, presContext, bounds, animSegment->endState().get_ArrayOfTransformFunction()); } else if (aProperty == eCSSProperty_opacity) { animSegment->startState() = segment->mFromValue.GetFloatValue(); animSegment->endState() = segment->mToValue.GetFloatValue(); } animSegment->startPortion() = segment->mFromKey; animSegment->endPortion() = segment->mToKey; animSegment->sampleFn() = ToTimingFunction(segment->mTimingFunction); } } } static void AddAnimationsForProperty(nsIFrame* aFrame, nsCSSProperty aProperty, ElementAnimationPtrArray& aAnimations, Layer* aLayer, AnimationData& aData, bool aPending) { mozilla::TimeStamp currentTime = aFrame->PresContext()->RefreshDriver()->MostRecentRefresh(); for (uint32_t animIdx = 0; animIdx < aAnimations.Length(); animIdx++) { mozilla::ElementAnimation* anim = aAnimations[animIdx]; if (!(anim->HasAnimationOfProperty(aProperty) && anim->IsRunningAt(currentTime))) { continue; } AddAnimationForProperty(aFrame, aProperty, anim, aLayer, aData, aPending); anim->mIsRunningOnCompositor = true; } } /* static */ void nsDisplayListBuilder::AddAnimationsAndTransitionsToLayer(Layer* aLayer, nsDisplayListBuilder* aBuilder, nsDisplayItem* aItem, nsIFrame* aFrame, nsCSSProperty aProperty) { // This function can be called in two ways: from // nsDisplay*::BuildLayer while constructing a layer (with all // pointers non-null), or from RestyleManager's handling of // UpdateOpacityLayer/UpdateTransformLayer hints. MOZ_ASSERT(!aBuilder == !aItem, "should only be called in two configurations, with both " "aBuilder and aItem, or with neither"); MOZ_ASSERT(!aItem || aFrame == aItem->Frame(), "frame mismatch"); bool pending = !aBuilder; if (pending) { aLayer->ClearAnimationsForNextTransaction(); } else { aLayer->ClearAnimations(); } nsIContent* content = aFrame->GetContent(); if (!content) { return; } ElementTransitions* et = nsTransitionManager::GetTransitionsForCompositor(content, aProperty); ElementAnimations* ea = nsAnimationManager::GetAnimationsForCompositor(content, aProperty); if (!ea && !et) { return; } // If the frame is not prerendered, bail out. // Do this check only during layer construction; during updating the // caller is required to check it appropriately. if (aItem && !aItem->CanUseAsyncAnimations(aBuilder)) { // AnimationManager or TransitionManager need to know that we refused to // run this animation asynchronously so that they will not throttle the // main thread animation. aFrame->Properties().Set(nsIFrame::RefusedAsyncAnimation(), reinterpret_cast(intptr_t(true))); // We need to schedule another refresh driver run so that AnimationManager // or TransitionManager get a chance to unthrottle the animation. aFrame->SchedulePaint(); return; } AnimationData data; if (aProperty == eCSSProperty_transform) { nsRect bounds = nsDisplayTransform::GetFrameBoundsForTransform(aFrame); // all data passed directly to the compositor should be in css pixels float scale = nsDeviceContext::AppUnitsPerCSSPixel(); gfxPoint3D offsetToTransformOrigin = nsDisplayTransform::GetDeltaToTransformOrigin(aFrame, scale, &bounds); gfxPoint3D offsetToPerspectiveOrigin = nsDisplayTransform::GetDeltaToPerspectiveOrigin(aFrame, scale); nscoord perspective = 0.0; nsStyleContext* parentStyleContext = aFrame->StyleContext()->GetParent(); if (parentStyleContext) { const nsStyleDisplay* disp = parentStyleContext->StyleDisplay(); if (disp && disp->mChildPerspective.GetUnit() == eStyleUnit_Coord) { perspective = disp->mChildPerspective.GetCoordValue(); } } nsPoint origin; if (aItem) { origin = aItem->ToReferenceFrame(); } else { // transform display items used a reference frame computed from // their GetTransformRootFrame(). nsIFrame* referenceFrame = nsLayoutUtils::GetReferenceFrame(GetTransformRootFrame(aFrame)); origin = aFrame->GetOffsetToCrossDoc(referenceFrame); } data = TransformData(origin, offsetToTransformOrigin, offsetToPerspectiveOrigin, bounds, perspective, aFrame->PresContext()->AppUnitsPerDevPixel()); } else if (aProperty == eCSSProperty_opacity) { data = null_t(); } if (et) { AddAnimationsForProperty(aFrame, aProperty, et->mAnimations, aLayer, data, pending); aLayer->SetAnimationGeneration(et->mAnimationGeneration); } if (ea) { AddAnimationsForProperty(aFrame, aProperty, ea->mAnimations, aLayer, data, pending); aLayer->SetAnimationGeneration(ea->mAnimationGeneration); } } nsDisplayListBuilder::nsDisplayListBuilder(nsIFrame* aReferenceFrame, Mode aMode, bool aBuildCaret) : mReferenceFrame(aReferenceFrame), mIgnoreScrollFrame(nullptr), mLayerEventRegions(nullptr), mCurrentTableItem(nullptr), mFinalTransparentRegion(nullptr), mCachedOffsetFrame(aReferenceFrame), mCachedReferenceFrame(aReferenceFrame), mCachedOffset(0, 0), mGlassDisplayItem(nullptr), mMode(aMode), mCurrentScrollParentId(FrameMetrics::NULL_SCROLL_ID), mCurrentScrollbarTarget(FrameMetrics::NULL_SCROLL_ID), mCurrentScrollbarFlags(0), mBuildCaret(aBuildCaret), mIgnoreSuppression(false), mHadToIgnoreSuppression(false), mIsAtRootOfPseudoStackingContext(false), mIncludeAllOutOfFlows(false), mDescendIntoSubdocuments(true), mSelectedFramesOnly(false), mAccurateVisibleRegions(false), mAllowMergingAndFlattening(true), mWillComputePluginGeometry(false), mInTransform(false), mInFixedPos(false), mSyncDecodeImages(false), mIsPaintingToWindow(false), mIsCompositingCheap(false), mContainsPluginItem(false), mAncestorHasTouchEventHandler(false), mHaveScrollableDisplayPort(false) { MOZ_COUNT_CTOR(nsDisplayListBuilder); PL_InitArenaPool(&mPool, "displayListArena", 1024, std::max(NS_ALIGNMENT_OF(void*),NS_ALIGNMENT_OF(double))-1); nsPresContext* pc = aReferenceFrame->PresContext(); nsIPresShell *shell = pc->PresShell(); if (pc->IsRenderingOnlySelection()) { nsCOMPtr selcon(do_QueryInterface(shell)); if (selcon) { selcon->GetSelection(nsISelectionController::SELECTION_NORMAL, getter_AddRefs(mBoundingSelection)); } } nsCSSRendering::BeginFrameTreesLocked(); PR_STATIC_ASSERT(nsDisplayItem::TYPE_MAX < (1 << nsDisplayItem::TYPE_BITS)); } static void MarkFrameForDisplay(nsIFrame* aFrame, nsIFrame* aStopAtFrame) { for (nsIFrame* f = aFrame; f; f = nsLayoutUtils::GetParentOrPlaceholderFor(f)) { if (f->GetStateBits() & NS_FRAME_FORCE_DISPLAY_LIST_DESCEND_INTO) return; f->AddStateBits(NS_FRAME_FORCE_DISPLAY_LIST_DESCEND_INTO); if (f == aStopAtFrame) { // we've reached a frame that we know will be painted, so we can stop. break; } } } void nsDisplayListBuilder::SetContainsBlendMode(uint8_t aBlendMode) { MOZ_ASSERT(aBlendMode != NS_STYLE_BLEND_NORMAL); gfxContext::GraphicsOperator op = nsCSSRendering::GetGFXBlendMode(aBlendMode); mContainedBlendModes += gfx::CompositionOpForOp(op); } void nsDisplayListBuilder::MarkOutOfFlowFrameForDisplay(nsIFrame* aDirtyFrame, nsIFrame* aFrame, const nsRect& aDirtyRect) { nsRect dirtyRectRelativeToDirtyFrame = aDirtyRect; if (nsLayoutUtils::IsFixedPosFrameInDisplayPort(aFrame)) { NS_ASSERTION(aDirtyFrame == aFrame->GetParent(), "Dirty frame should be viewport frame"); // position: fixed items are reflowed into and only drawn inside the // viewport, or the scroll position clamping scrollport size, if one is // set. nsIPresShell* ps = aFrame->PresContext()->PresShell(); dirtyRectRelativeToDirtyFrame.MoveTo(0, 0); if (ps->IsScrollPositionClampingScrollPortSizeSet()) { dirtyRectRelativeToDirtyFrame.SizeTo(ps->GetScrollPositionClampingScrollPortSize()); } else { dirtyRectRelativeToDirtyFrame.SizeTo(aDirtyFrame->GetSize()); } } nsRect dirty = dirtyRectRelativeToDirtyFrame - aFrame->GetOffsetTo(aDirtyFrame); nsRect overflowRect = aFrame->GetVisualOverflowRect(); if (aFrame->IsTransformed() && nsLayoutUtils::HasAnimationsForCompositor(aFrame->GetContent(), eCSSProperty_transform)) { /** * Add a fuzz factor to the overflow rectangle so that elements only just * out of view are pulled into the display list, so they can be * prerendered if necessary. */ overflowRect.Inflate(nsPresContext::CSSPixelsToAppUnits(32)); } if (!dirty.IntersectRect(dirty, overflowRect)) return; const DisplayItemClip* clip = mClipState.GetClipForContainingBlockDescendants(); OutOfFlowDisplayData* data = clip ? new OutOfFlowDisplayData(*clip, dirty) : new OutOfFlowDisplayData(dirty); aFrame->Properties().Set(nsDisplayListBuilder::OutOfFlowDisplayDataProperty(), data); MarkFrameForDisplay(aFrame, aDirtyFrame); } static void UnmarkFrameForDisplay(nsIFrame* aFrame) { nsPresContext* presContext = aFrame->PresContext(); presContext->PropertyTable()-> Delete(aFrame, nsDisplayListBuilder::OutOfFlowDisplayDataProperty()); for (nsIFrame* f = aFrame; f; f = nsLayoutUtils::GetParentOrPlaceholderFor(f)) { if (!(f->GetStateBits() & NS_FRAME_FORCE_DISPLAY_LIST_DESCEND_INTO)) return; f->RemoveStateBits(NS_FRAME_FORCE_DISPLAY_LIST_DESCEND_INTO); } } static bool gPrintApzcTree = false; static bool GetApzcTreePrintPref() { static bool initialized = false; if (!initialized) { Preferences::AddBoolVarCache(&gPrintApzcTree, "apz.printtree", gPrintApzcTree); initialized = true; } return gPrintApzcTree; } static void RecordFrameMetrics(nsIFrame* aForFrame, nsIFrame* aScrollFrame, const nsIFrame* aReferenceFrame, ContainerLayer* aRoot, const nsRect& aVisibleRect, const nsRect& aViewport, nsRect* aDisplayPort, nsRect* aCriticalDisplayPort, ViewID aScrollId, bool aIsRoot, const ContainerLayerParameters& aContainerParameters) { nsPresContext* presContext = aForFrame->PresContext(); int32_t auPerDevPixel = presContext->AppUnitsPerDevPixel(); LayoutDeviceToLayerScale resolution(aContainerParameters.mXScale, aContainerParameters.mYScale); nsIntRect visible = aVisibleRect.ScaleToNearestPixels( resolution.scale, resolution.scale, auPerDevPixel); aRoot->SetVisibleRegion(visible); nsIPresShell* presShell = presContext->GetPresShell(); FrameMetrics metrics; metrics.mViewport = CSSRect::FromAppUnits(aViewport); if (aDisplayPort) { metrics.mDisplayPort = CSSRect::FromAppUnits(*aDisplayPort); nsLayoutUtils::LogTestDataForPaint(presShell, aScrollId, "displayport", metrics.mDisplayPort); if (aCriticalDisplayPort) { metrics.mCriticalDisplayPort = CSSRect::FromAppUnits(*aCriticalDisplayPort); } } nsIScrollableFrame* scrollableFrame = nullptr; if (aScrollFrame) scrollableFrame = aScrollFrame->GetScrollTargetFrame(); metrics.mScrollableRect = CSSRect::FromAppUnits( nsLayoutUtils::CalculateScrollableRectForFrame(scrollableFrame, aForFrame)); if (scrollableFrame) { nsPoint scrollPosition = scrollableFrame->GetScrollPosition(); metrics.SetScrollOffset(CSSPoint::FromAppUnits(scrollPosition)); // If the frame was scrolled since the last layers update, and by // something other than the APZ code, we want to tell the APZ to update // its scroll offset. nsIAtom* originOfLastScroll = scrollableFrame->OriginOfLastScroll(); if (originOfLastScroll && originOfLastScroll != nsGkAtoms::apz) { metrics.SetScrollOffsetUpdated(scrollableFrame->CurrentScrollGeneration()); } } metrics.SetScrollId(aScrollId); metrics.mIsRoot = aIsRoot; // Only the root scrollable frame for a given presShell should pick up // the presShell's resolution. All the other frames are 1.0. if (aScrollFrame == presShell->GetRootScrollFrame()) { metrics.mResolution = ParentLayerToLayerScale(presShell->GetXResolution(), presShell->GetYResolution()); } else { metrics.mResolution = ParentLayerToLayerScale(1.0f); } // For the cumulateive resolution, multiply the resolutions of all the // presShells back up to the root metrics.mCumulativeResolution = LayoutDeviceToLayerScale(1.0f); nsIPresShell* curPresShell = presShell; while (curPresShell != nullptr) { ParentLayerToLayerScale presShellResolution(curPresShell->GetXResolution(), curPresShell->GetYResolution()); metrics.mCumulativeResolution.scale *= presShellResolution.scale; nsPresContext* parentContext = curPresShell->GetPresContext()->GetParentPresContext(); curPresShell = parentContext ? parentContext->GetPresShell() : nullptr; } metrics.mDevPixelsPerCSSPixel = CSSToLayoutDeviceScale( (float)nsPresContext::AppUnitsPerCSSPixel() / auPerDevPixel); // Initially, AsyncPanZoomController should render the content to the screen // at the painted resolution. const LayerToScreenScale layerToScreenScale(1.0f); metrics.SetZoom(metrics.mCumulativeResolution * metrics.mDevPixelsPerCSSPixel * layerToScreenScale); if (presShell) { nsIDocument* document = nullptr; document = presShell->GetDocument(); if (document) { nsCOMPtr innerWin(document->GetInnerWindow()); if (innerWin) { metrics.mMayHaveTouchListeners = innerWin->HasTouchEventListeners(); } } metrics.mMayHaveTouchCaret = presShell->MayHaveTouchCaret(); } LayoutDeviceToParentLayerScale layoutToParentLayerScale = // The ScreenToParentLayerScale should be mTransformScale which is not calculated yet, // but we don't yet handle CSS transforms, so we assume it's 1 here. metrics.mCumulativeResolution * LayerToScreenScale(1.0) * ScreenToParentLayerScale(1.0); // Calculate the composition bounds as the size of the scroll frame and // its origin relative to the reference frame. // If aScrollFrame is null, we are in a document without a root scroll frame, // so it's a xul document. In this case, use the size of the viewport frame. nsIFrame* frameForCompositionBoundsCalculation = aScrollFrame ? aScrollFrame : aForFrame; nsRect compositionBounds(frameForCompositionBoundsCalculation->GetOffsetToCrossDoc(aReferenceFrame), frameForCompositionBoundsCalculation->GetSize()); metrics.mCompositionBounds = RoundedToInt(LayoutDeviceRect::FromAppUnits(compositionBounds, auPerDevPixel) * layoutToParentLayerScale); // For the root scroll frame of the root content document, the above calculation // will yield the size of the viewport frame as the composition bounds, which // doesn't actually correspond to what is visible when // nsIDOMWindowUtils::setCSSViewport has been called to modify the visible area of // the prescontext that the viewport frame is reflowed into. In that case if our // document has a widget then the widget's bounds will correspond to what is // visible. If we don't have a widget the root view's bounds correspond to what // would be visible because they don't get modified by setCSSViewport. bool isRootContentDocRootScrollFrame = presContext->IsRootContentDocument() && aScrollFrame == presShell->GetRootScrollFrame(); if (isRootContentDocRootScrollFrame) { if (nsIFrame* rootFrame = presShell->GetRootFrame()) { if (nsView* view = rootFrame->GetView()) { nsRect viewBoundsAppUnits = view->GetBounds() + rootFrame->GetOffsetToCrossDoc(aReferenceFrame); ParentLayerIntRect viewBounds = RoundedToInt(LayoutDeviceRect::FromAppUnits(viewBoundsAppUnits, auPerDevPixel) * layoutToParentLayerScale); // On Android, we need to do things a bit differently to get things // right (see bug 983208, bug 988882). We use the bounds of the nearest // widget, but clamp the height to the view bounds height. This clamping // is done to get correct results for a page where the page is sized to // the screen and thus the dynamic toolbar never disappears. In such a // case, we want the composition bounds to exclude the toolbar height, // but the widget bounds includes it. We don't currently have a good way // of knowing about the toolbar height, but clamping to the view bounds // height gives the correct answer in the cases we care about. nsIWidget* widget = #ifdef MOZ_WIDGET_ANDROID rootFrame->GetNearestWidget(); #else view->GetWidget(); #endif if (widget) { nsIntRect widgetBounds; widget->GetBounds(widgetBounds); metrics.mCompositionBounds = ViewAs(widgetBounds); #ifdef MOZ_WIDGET_ANDROID if (viewBounds.height < metrics.mCompositionBounds.height) { metrics.mCompositionBounds.height = viewBounds.height; } #endif } else { metrics.mCompositionBounds = viewBounds; } } } } // Adjust composition bounds for the size of scroll bars. if (scrollableFrame && !LookAndFeel::GetInt(LookAndFeel::eIntID_UseOverlayScrollbars)) { nsMargin sizes = scrollableFrame->GetActualScrollbarSizes(); // Scrollbars are not subject to scaling, so CSS pixels = layer pixels for them. ParentLayerIntMargin boundMargins = RoundedToInt(CSSMargin::FromAppUnits(sizes) * CSSToParentLayerScale(1.0f)); metrics.mCompositionBounds.Deflate(boundMargins); } metrics.SetRootCompositionSize( nsLayoutUtils::CalculateRootCompositionSize(aScrollFrame ? aScrollFrame : aForFrame, isRootContentDocRootScrollFrame, metrics)); if (GetApzcTreePrintPref()) { if (nsIContent* content = frameForCompositionBoundsCalculation->GetContent()) { nsAutoString contentDescription; content->Describe(contentDescription); metrics.SetContentDescription(NS_LossyConvertUTF16toASCII(contentDescription).get()); } } metrics.SetPresShellId(presShell->GetPresShellId()); // If the scroll frame's content is marked 'scrollgrab', record this // in the FrameMetrics so APZ knows to provide the scroll grabbing // behaviour. if (aScrollFrame && nsContentUtils::HasScrollgrab(aScrollFrame->GetContent())) { metrics.mHasScrollgrab = true; } aRoot->SetFrameMetrics(metrics); } nsDisplayListBuilder::~nsDisplayListBuilder() { NS_ASSERTION(mFramesMarkedForDisplay.Length() == 0, "All frames should have been unmarked"); NS_ASSERTION(mPresShellStates.Length() == 0, "All presshells should have been exited"); NS_ASSERTION(!mCurrentTableItem, "No table item should be active"); nsCSSRendering::EndFrameTreesLocked(); for (uint32_t i = 0; i < mDisplayItemClipsToDestroy.Length(); ++i) { mDisplayItemClipsToDestroy[i]->DisplayItemClip::~DisplayItemClip(); } PL_FinishArenaPool(&mPool); MOZ_COUNT_DTOR(nsDisplayListBuilder); } uint32_t nsDisplayListBuilder::GetBackgroundPaintFlags() { uint32_t flags = 0; if (mSyncDecodeImages) { flags |= nsCSSRendering::PAINTBG_SYNC_DECODE_IMAGES; } if (mIsPaintingToWindow) { flags |= nsCSSRendering::PAINTBG_TO_WINDOW; } return flags; } void nsDisplayListBuilder::SubtractFromVisibleRegion(nsRegion* aVisibleRegion, const nsRegion& aRegion) { if (aRegion.IsEmpty()) return; nsRegion tmp; tmp.Sub(*aVisibleRegion, aRegion); // Don't let *aVisibleRegion get too complex, but don't let it fluff out // to its bounds either, which can be very bad (see bug 516740). // Do let aVisibleRegion get more complex if by doing so we reduce its // area by at least half. if (GetAccurateVisibleRegions() || tmp.GetNumRects() <= 15 || tmp.Area() <= aVisibleRegion->Area()/2) { *aVisibleRegion = tmp; } } nsCaret * nsDisplayListBuilder::GetCaret() { nsRefPtr caret = CurrentPresShellState()->mPresShell->GetCaret(); return caret; } void nsDisplayListBuilder::EnterPresShell(nsIFrame* aReferenceFrame, const nsRect& aDirtyRect) { PresShellState* state = mPresShellStates.AppendElement(); if (!state) return; state->mPresShell = aReferenceFrame->PresContext()->PresShell(); state->mCaretFrame = nullptr; state->mFirstFrameMarkedForDisplay = mFramesMarkedForDisplay.Length(); state->mPresShell->UpdateCanvasBackground(); if (mIsPaintingToWindow) { mReferenceFrame->AddPaintedPresShell(state->mPresShell); state->mPresShell->IncrementPaintCount(); } bool buildCaret = mBuildCaret; if (mIgnoreSuppression || !state->mPresShell->IsPaintingSuppressed()) { if (state->mPresShell->IsPaintingSuppressed()) { mHadToIgnoreSuppression = true; } state->mIsBackgroundOnly = false; } else { state->mIsBackgroundOnly = true; buildCaret = false; } if (!buildCaret) return; nsRefPtr caret = state->mPresShell->GetCaret(); state->mCaretFrame = caret->GetCaretFrame(); NS_ASSERTION(state->mCaretFrame == caret->GetCaretFrame(), "GetCaretFrame() is unstable"); if (state->mCaretFrame) { // Check if the dirty rect intersects with the caret's dirty rect. nsRect caretRect = caret->GetCaretRect() + state->mCaretFrame->GetOffsetTo(aReferenceFrame); if (caretRect.Intersects(aDirtyRect)) { // Okay, our rects intersect, let's mark the frame and all of its ancestors. mFramesMarkedForDisplay.AppendElement(state->mCaretFrame); MarkFrameForDisplay(state->mCaretFrame, nullptr); } } } void nsDisplayListBuilder::LeavePresShell(nsIFrame* aReferenceFrame, const nsRect& aDirtyRect) { if (CurrentPresShellState()->mPresShell != aReferenceFrame->PresContext()->PresShell()) { // Must have not allocated a state for this presshell, presumably due // to OOM. return; } ResetMarkedFramesForDisplayList(); mPresShellStates.SetLength(mPresShellStates.Length() - 1); } void nsDisplayListBuilder::ResetMarkedFramesForDisplayList() { // Unmark and pop off the frames marked for display in this pres shell. uint32_t firstFrameForShell = CurrentPresShellState()->mFirstFrameMarkedForDisplay; for (uint32_t i = firstFrameForShell; i < mFramesMarkedForDisplay.Length(); ++i) { UnmarkFrameForDisplay(mFramesMarkedForDisplay[i]); } mFramesMarkedForDisplay.SetLength(firstFrameForShell); } void nsDisplayListBuilder::MarkFramesForDisplayList(nsIFrame* aDirtyFrame, const nsFrameList& aFrames, const nsRect& aDirtyRect) { mFramesMarkedForDisplay.SetCapacity(mFramesMarkedForDisplay.Length() + aFrames.GetLength()); for (nsFrameList::Enumerator e(aFrames); !e.AtEnd(); e.Next()) { mFramesMarkedForDisplay.AppendElement(e.get()); MarkOutOfFlowFrameForDisplay(aDirtyFrame, e.get(), aDirtyRect); } } void nsDisplayListBuilder::MarkPreserve3DFramesForDisplayList(nsIFrame* aDirtyFrame, const nsRect& aDirtyRect) { nsAutoTArray childListArray; aDirtyFrame->GetChildLists(&childListArray); nsIFrame::ChildListArrayIterator lists(childListArray); for (; !lists.IsDone(); lists.Next()) { nsFrameList::Enumerator childFrames(lists.CurrentList()); for (; !childFrames.AtEnd(); childFrames.Next()) { nsIFrame *child = childFrames.get(); if (child->Preserves3D()) { mFramesMarkedForDisplay.AppendElement(child); nsRect dirty = aDirtyRect - child->GetOffsetTo(aDirtyFrame); child->Properties().Set(nsDisplayListBuilder::Preserve3DDirtyRectProperty(), new nsRect(dirty)); MarkFrameForDisplay(child, aDirtyFrame); } } } } void* nsDisplayListBuilder::Allocate(size_t aSize) { void *tmp; PL_ARENA_ALLOCATE(tmp, &mPool, aSize); if (!tmp) { NS_RUNTIMEABORT("out of memory"); } return tmp; } const DisplayItemClip* nsDisplayListBuilder::AllocateDisplayItemClip(const DisplayItemClip& aOriginal) { void* p = Allocate(sizeof(DisplayItemClip)); if (!aOriginal.GetRoundedRectCount()) { memcpy(p, &aOriginal, sizeof(DisplayItemClip)); return static_cast(p); } DisplayItemClip* c = new (p) DisplayItemClip(aOriginal); mDisplayItemClipsToDestroy.AppendElement(c); return c; } void nsDisplayListSet::MoveTo(const nsDisplayListSet& aDestination) const { aDestination.BorderBackground()->AppendToTop(BorderBackground()); aDestination.BlockBorderBackgrounds()->AppendToTop(BlockBorderBackgrounds()); aDestination.Floats()->AppendToTop(Floats()); aDestination.Content()->AppendToTop(Content()); aDestination.PositionedDescendants()->AppendToTop(PositionedDescendants()); aDestination.Outlines()->AppendToTop(Outlines()); } void nsDisplayList::FlattenTo(nsTArray* aElements) { nsDisplayItem* item; while ((item = RemoveBottom()) != nullptr) { if (item->GetType() == nsDisplayItem::TYPE_WRAP_LIST) { item->GetSameCoordinateSystemChildren()->FlattenTo(aElements); item->~nsDisplayItem(); } else { aElements->AppendElement(item); } } } nsRect nsDisplayList::GetBounds(nsDisplayListBuilder* aBuilder) const { nsRect bounds; for (nsDisplayItem* i = GetBottom(); i != nullptr; i = i->GetAbove()) { bounds.UnionRect(bounds, i->GetClippedBounds(aBuilder)); } return bounds; } bool nsDisplayList::ComputeVisibilityForRoot(nsDisplayListBuilder* aBuilder, nsRegion* aVisibleRegion, nsIFrame* aDisplayPortFrame) { PROFILER_LABEL("nsDisplayList", "ComputeVisibilityForRoot", js::ProfileEntry::Category::GRAPHICS); nsRegion r; r.And(*aVisibleRegion, GetBounds(aBuilder)); return ComputeVisibilityForSublist(aBuilder, aVisibleRegion, r.GetBounds(), r.GetBounds(), aDisplayPortFrame); } static nsRegion TreatAsOpaque(nsDisplayItem* aItem, nsDisplayListBuilder* aBuilder) { bool snap; nsRegion opaque = aItem->GetOpaqueRegion(aBuilder, &snap); if (aBuilder->IsForPluginGeometry()) { // Treat all leaf chrome items as opaque, unless their frames are opacity:0. // Since opacity:0 frames generate an nsDisplayOpacity, that item will // not be treated as opaque here, so opacity:0 chrome content will be // effectively ignored, as it should be. // We treat leaf chrome items as opaque to ensure that they cover // content plugins, for security reasons. // Non-leaf chrome items don't render contents of their own so shouldn't // be treated as opaque (and their bounds is just the union of their // children, which might be a large area their contents don't really cover). nsIFrame* f = aItem->Frame(); if (f->PresContext()->IsChrome() && !aItem->GetChildren() && f->StyleDisplay()->mOpacity != 0.0) { opaque = aItem->GetBounds(aBuilder, &snap); } } if (opaque.IsEmpty()) { return opaque; } nsRegion opaqueClipped; nsRegionRectIterator iter(opaque); for (const nsRect* r = iter.Next(); r; r = iter.Next()) { opaqueClipped.Or(opaqueClipped, aItem->GetClip().ApproximateIntersectInward(*r)); } return opaqueClipped; } /* Checks if aPotentialScrollItem is a scroll layer item and aPotentialScrollbarItem * is an overlay scrollbar item for the same scroll frame. */ static bool IsScrollLayerItemAndOverlayScrollbarForScrollFrame( nsDisplayItem* aPotentialScrollItem, nsDisplayItem* aPotentialScrollbarItem) { if (aPotentialScrollItem->GetType() == nsDisplayItem::TYPE_SCROLL_LAYER && aPotentialScrollbarItem && aPotentialScrollbarItem->GetType() == nsDisplayItem::TYPE_OWN_LAYER && LookAndFeel::GetInt(LookAndFeel::eIntID_UseOverlayScrollbars)) { nsDisplayScrollLayer* scrollItem = static_cast(aPotentialScrollItem); nsDisplayOwnLayer* layerItem = static_cast(aPotentialScrollbarItem); if ((layerItem->GetFlags() & (nsDisplayOwnLayer::VERTICAL_SCROLLBAR | nsDisplayOwnLayer::HORIZONTAL_SCROLLBAR)) && layerItem->Frame()->GetParent() == scrollItem->GetScrollFrame()) { return true; } } return false; } bool nsDisplayList::ComputeVisibilityForSublist(nsDisplayListBuilder* aBuilder, nsRegion* aVisibleRegion, const nsRect& aListVisibleBounds, const nsRect& aAllowVisibleRegionExpansion, nsIFrame* aDisplayPortFrame) { #ifdef DEBUG nsRegion r; r.And(*aVisibleRegion, GetBounds(aBuilder)); NS_ASSERTION(r.GetBounds().IsEqualInterior(aListVisibleBounds), "bad aListVisibleBounds"); #endif mVisibleRect = aListVisibleBounds; bool anyVisible = false; nsAutoTArray elements; FlattenTo(&elements); bool forceTransparentSurface = false; for (int32_t i = elements.Length() - 1; i >= 0; --i) { nsDisplayItem* item = elements[i]; nsDisplayItem* belowItem = i < 1 ? nullptr : elements[i - 1]; nsDisplayList* list = item->GetSameCoordinateSystemChildren(); if (aBuilder->AllowMergingAndFlattening()) { if (belowItem && item->TryMerge(aBuilder, belowItem)) { belowItem->~nsDisplayItem(); elements.ReplaceElementsAt(i - 1, 1, item); continue; } // If an overlay scrollbar item is between a scroll layer item and the // other scroll layer items that we need to merge with just move the // scrollbar item up, that way it will be on top of the scrolled content // and we can try to merge all the scroll layer items. if (IsScrollLayerItemAndOverlayScrollbarForScrollFrame(item, belowItem)) { elements[i] = belowItem; elements[i-1] = item; i++; continue; } if (list && item->ShouldFlattenAway(aBuilder)) { // The elements on the list >= i no longer serve any use. elements.SetLength(i); list->FlattenTo(&elements); i = elements.Length(); item->~nsDisplayItem(); continue; } } nsRect bounds = item->GetClippedBounds(aBuilder); nsRegion itemVisible; itemVisible.And(*aVisibleRegion, bounds); item->mVisibleRect = itemVisible.GetBounds(); if (item->ComputeVisibility(aBuilder, aVisibleRegion, aAllowVisibleRegionExpansion.Intersect(bounds))) { anyVisible = true; // If we're in a displayport, we need to make sure that fixed position // items do not subtract from the visible region, as async scrolling // may expose these occluded areas. // If the item is fixed pos in the same document as the displayport // then don't let it occlude this list. The only other case possible // is that the fixed pos content is in a child document, in which it // would scroll with the rest of the content. bool occlude = true; if (aDisplayPortFrame && item->IsInFixedPos()) { if (item->Frame()->PresContext() == aDisplayPortFrame->PresContext()) { occlude = false; } } if (occlude) { nsRegion opaque = TreatAsOpaque(item, aBuilder); // Subtract opaque item from the visible region aBuilder->SubtractFromVisibleRegion(aVisibleRegion, opaque); } if (aBuilder->NeedToForceTransparentSurfaceForItem(item) || (list && list->NeedsTransparentSurface())) { forceTransparentSurface = true; } } AppendToBottom(item); } mIsOpaque = !aVisibleRegion->Intersects(mVisibleRect); mForceTransparentSurface = forceTransparentSurface; #if defined(DEBUG) || defined(MOZ_DUMP_PAINTING) mDidComputeVisibility = true; #endif return anyVisible; } void nsDisplayList::PaintRoot(nsDisplayListBuilder* aBuilder, nsRenderingContext* aCtx, uint32_t aFlags) const { PROFILER_LABEL("nsDisplayList", "PaintRoot", js::ProfileEntry::Category::GRAPHICS); PaintForFrame(aBuilder, aCtx, aBuilder->RootReferenceFrame(), aFlags); } /** * We paint by executing a layer manager transaction, constructing a * single layer representing the display list, and then making it the * root of the layer manager, drawing into the ThebesLayers. */ void nsDisplayList::PaintForFrame(nsDisplayListBuilder* aBuilder, nsRenderingContext* aCtx, nsIFrame* aForFrame, uint32_t aFlags) const { NS_ASSERTION(mDidComputeVisibility, "Must call ComputeVisibility before calling Paint"); nsRefPtr layerManager; bool widgetTransaction = false; bool allowRetaining = false; bool doBeginTransaction = true; nsView *view = nullptr; if (aFlags & PAINT_USE_WIDGET_LAYERS) { nsIFrame* rootReferenceFrame = aBuilder->RootReferenceFrame(); view = rootReferenceFrame->GetView(); NS_ASSERTION(rootReferenceFrame == nsLayoutUtils::GetDisplayRootFrame(rootReferenceFrame), "Reference frame must be a display root for us to use the layer manager"); nsIWidget* window = rootReferenceFrame->GetNearestWidget(); if (window) { layerManager = window->GetLayerManager(&allowRetaining); if (layerManager) { doBeginTransaction = !(aFlags & PAINT_EXISTING_TRANSACTION); widgetTransaction = true; } } } if (!layerManager) { if (!aCtx) { NS_WARNING("Nowhere to paint into"); return; } layerManager = new BasicLayerManager(); } // Store the existing layer builder to reinstate it on return. FrameLayerBuilder *oldBuilder = layerManager->GetLayerBuilder(); FrameLayerBuilder *layerBuilder = new FrameLayerBuilder(); layerBuilder->Init(aBuilder, layerManager); if (aFlags & PAINT_COMPRESSED) { layerBuilder->SetLayerTreeCompressionMode(); } if (aFlags & PAINT_FLUSH_LAYERS) { FrameLayerBuilder::InvalidateAllLayers(layerManager); } if (doBeginTransaction) { if (aCtx) { layerManager->BeginTransactionWithTarget(aCtx->ThebesContext()); } else { layerManager->BeginTransaction(); } } if (widgetTransaction) { layerBuilder->DidBeginRetainedLayerTransaction(layerManager); } nsPresContext* presContext = aForFrame->PresContext(); nsIPresShell* presShell = presContext->GetPresShell(); NotifySubDocInvalidationFunc computeInvalidFunc = presContext->MayHavePaintEventListenerInSubDocument() ? nsPresContext::NotifySubDocInvalidation : 0; bool computeInvalidRect = (computeInvalidFunc || (!layerManager->IsCompositingCheap() && layerManager->NeedsWidgetInvalidation())) && widgetTransaction; nsAutoPtr props(computeInvalidRect ? LayerProperties::CloneFrom(layerManager->GetRoot()) : nullptr); ContainerLayerParameters containerParameters (presShell->GetXResolution(), presShell->GetYResolution()); nsRefPtr root = layerBuilder-> BuildContainerLayerFor(aBuilder, layerManager, aForFrame, nullptr, *this, containerParameters, nullptr); nsIDocument* document = nullptr; if (presShell) { document = presShell->GetDocument(); } if (widgetTransaction || // SVG-as-an-image docs don't paint as part of the retained layer tree, // but they still need the invalidation state bits cleared in order for // invalidation for CSS/SMIL animation to work properly. (document && document->IsBeingUsedAsImage())) { aForFrame->ClearInvalidationStateBits(); } if (!root) { layerManager->SetUserData(&gLayerManagerLayerBuilder, oldBuilder); return; } // Root is being scaled up by the X/Y resolution. Scale it back down. root->SetPostScale(1.0f/containerParameters.mXScale, 1.0f/containerParameters.mYScale); ViewID id = FrameMetrics::NULL_SCROLL_ID; bool isRoot = presContext->IsRootContentDocument(); nsIFrame* rootScrollFrame = presShell->GetRootScrollFrame(); nsRect displayport, criticalDisplayport; bool usingDisplayport = false; bool usingCriticalDisplayport = false; if (rootScrollFrame) { nsIContent* content = rootScrollFrame->GetContent(); if (content) { usingDisplayport = nsLayoutUtils::GetDisplayPort(content, &displayport); usingCriticalDisplayport = nsLayoutUtils::GetCriticalDisplayPort(content, &criticalDisplayport); // If this is the root content document, we want it to have a scroll id. if (isRoot) { id = nsLayoutUtils::FindOrCreateIDFor(content); } } } nsRect viewport(aBuilder->ToReferenceFrame(aForFrame), aForFrame->GetSize()); RecordFrameMetrics(aForFrame, rootScrollFrame, aBuilder->FindReferenceFrameFor(aForFrame), root, mVisibleRect, viewport, (usingDisplayport ? &displayport : nullptr), (usingCriticalDisplayport ? &criticalDisplayport : nullptr), id, isRoot, containerParameters); if (usingDisplayport && !(root->GetContentFlags() & Layer::CONTENT_OPAQUE)) { // See bug 693938, attachment 567017 NS_WARNING("Transparent content with displayports can be expensive."); } layerManager->SetRoot(root); layerBuilder->WillEndTransaction(); bool temp = aBuilder->SetIsCompositingCheap(layerManager->IsCompositingCheap()); LayerManager::EndTransactionFlags flags = LayerManager::END_DEFAULT; if (layerManager->NeedsWidgetInvalidation()) { if (aFlags & PAINT_NO_COMPOSITE) { flags = LayerManager::END_NO_COMPOSITE; } } else { // Client layer managers never composite directly, so // we don't need to worry about END_NO_COMPOSITE. if (aBuilder->WillComputePluginGeometry()) { flags = LayerManager::END_NO_REMOTE_COMPOSITE; } } MaybeSetupTransactionIdAllocator(layerManager, view); layerManager->EndTransaction(FrameLayerBuilder::DrawThebesLayer, aBuilder, flags); aBuilder->SetIsCompositingCheap(temp); layerBuilder->DidEndTransaction(); nsIntRegion invalid; if (props) { invalid = props->ComputeDifferences(root, computeInvalidFunc); } else if (widgetTransaction) { LayerProperties::ClearInvalidations(root); } bool shouldInvalidate = layerManager->NeedsWidgetInvalidation(); if (view) { if (props) { if (!invalid.IsEmpty()) { nsIntRect bounds = invalid.GetBounds(); nsRect rect(presContext->DevPixelsToAppUnits(bounds.x), presContext->DevPixelsToAppUnits(bounds.y), presContext->DevPixelsToAppUnits(bounds.width), presContext->DevPixelsToAppUnits(bounds.height)); if (shouldInvalidate) { view->GetViewManager()->InvalidateViewNoSuppression(view, rect); } presContext->NotifyInvalidation(bounds, 0); } } else if (shouldInvalidate) { view->GetViewManager()->InvalidateView(view); } } if (aFlags & PAINT_FLUSH_LAYERS) { FrameLayerBuilder::InvalidateAllLayers(layerManager); } layerManager->SetUserData(&gLayerManagerLayerBuilder, oldBuilder); } uint32_t nsDisplayList::Count() const { uint32_t count = 0; for (nsDisplayItem* i = GetBottom(); i; i = i->GetAbove()) { ++count; } return count; } nsDisplayItem* nsDisplayList::RemoveBottom() { nsDisplayItem* item = mSentinel.mAbove; if (!item) return nullptr; mSentinel.mAbove = item->mAbove; if (item == mTop) { // must have been the only item mTop = &mSentinel; } item->mAbove = nullptr; return item; } void nsDisplayList::DeleteAll() { nsDisplayItem* item; while ((item = RemoveBottom()) != nullptr) { item->~nsDisplayItem(); } } static bool GetMouseThrough(const nsIFrame* aFrame) { if (!aFrame->IsBoxFrame()) return false; const nsIFrame* frame = aFrame; while (frame) { if (frame->GetStateBits() & NS_FRAME_MOUSE_THROUGH_ALWAYS) { return true; } else if (frame->GetStateBits() & NS_FRAME_MOUSE_THROUGH_NEVER) { return false; } frame = nsBox::GetParentBox(frame); } return false; } static bool IsFrameReceivingPointerEvents(nsIFrame* aFrame) { nsSubDocumentFrame* frame = do_QueryFrame(aFrame); if (frame && frame->PassPointerEventsToChildren()) { return true; } return NS_STYLE_POINTER_EVENTS_NONE != aFrame->StyleVisibility()->GetEffectivePointerEvents(aFrame); } // A list of frames, and their z depth. Used for sorting // the results of hit testing. struct FramesWithDepth { FramesWithDepth(float aDepth) : mDepth(aDepth) {} bool operator<(const FramesWithDepth& aOther) const { if (mDepth != aOther.mDepth) { // We want to sort so that the shallowest item (highest depth value) is first return mDepth > aOther.mDepth; } return this < &aOther; } bool operator==(const FramesWithDepth& aOther) const { return this == &aOther; } float mDepth; nsTArray mFrames; }; // Sort the frames by depth and then moves all the contained frames to the destination void FlushFramesArray(nsTArray& aSource, nsTArray* aDest) { if (aSource.IsEmpty()) { return; } aSource.Sort(); uint32_t length = aSource.Length(); for (uint32_t i = 0; i < length; i++) { aDest->MoveElementsFrom(aSource[i].mFrames); } aSource.Clear(); } void nsDisplayList::HitTest(nsDisplayListBuilder* aBuilder, const nsRect& aRect, nsDisplayItem::HitTestState* aState, nsTArray *aOutFrames) const { int32_t itemBufferStart = aState->mItemBuffer.Length(); nsDisplayItem* item; for (item = GetBottom(); item; item = item->GetAbove()) { aState->mItemBuffer.AppendElement(item); } nsAutoTArray temp; for (int32_t i = aState->mItemBuffer.Length() - 1; i >= itemBufferStart; --i) { // Pop element off the end of the buffer. We want to shorten the buffer // so that recursive calls to HitTest have more buffer space. item = aState->mItemBuffer[i]; aState->mItemBuffer.SetLength(i); bool snap; nsRect r = item->GetBounds(aBuilder, &snap).Intersect(aRect); if (item->GetClip().MayIntersect(r)) { nsAutoTArray outFrames; item->HitTest(aBuilder, aRect, aState, &outFrames); // For 3d transforms with preserve-3d we add hit frames into the temp list // so we can sort them later, otherwise we add them directly to the output list. nsTArray *writeFrames = aOutFrames; if (item->GetType() == nsDisplayItem::TYPE_TRANSFORM && item->Frame()->Preserves3D()) { if (outFrames.Length()) { nsDisplayTransform *transform = static_cast(item); nsPoint point = aRect.TopLeft(); // A 1x1 rect means a point, otherwise use the center of the rect if (aRect.width != 1 || aRect.height != 1) { point = aRect.Center(); } temp.AppendElement(FramesWithDepth(transform->GetHitDepthAtPoint(aBuilder, point))); writeFrames = &temp[temp.Length() - 1].mFrames; } } else { // We may have just finished a run of consecutive preserve-3d transforms, // so flush these into the destination array before processing our frame list. FlushFramesArray(temp, aOutFrames); } for (uint32_t j = 0; j < outFrames.Length(); j++) { nsIFrame *f = outFrames.ElementAt(j); // Handle the XUL 'mousethrough' feature and 'pointer-events'. if (!GetMouseThrough(f) && IsFrameReceivingPointerEvents(f)) { writeFrames->AppendElement(f); } } } } // Clear any remaining preserve-3d transforms. FlushFramesArray(temp, aOutFrames); NS_ASSERTION(aState->mItemBuffer.Length() == uint32_t(itemBufferStart), "How did we forget to pop some elements?"); } static void Sort(nsDisplayList* aList, int32_t aCount, nsDisplayList::SortLEQ aCmp, void* aClosure) { if (aCount < 2) return; nsDisplayList list1; nsDisplayList list2; int i; int32_t half = aCount/2; bool sorted = true; nsDisplayItem* prev = nullptr; for (i = 0; i < aCount; ++i) { nsDisplayItem* item = aList->RemoveBottom(); (i < half ? &list1 : &list2)->AppendToTop(item); if (sorted && prev && !aCmp(prev, item, aClosure)) { sorted = false; } prev = item; } if (sorted) { aList->AppendToTop(&list1); aList->AppendToTop(&list2); return; } Sort(&list1, half, aCmp, aClosure); Sort(&list2, aCount - half, aCmp, aClosure); for (i = 0; i < aCount; ++i) { if (list1.GetBottom() && (!list2.GetBottom() || aCmp(list1.GetBottom(), list2.GetBottom(), aClosure))) { aList->AppendToTop(list1.RemoveBottom()); } else { aList->AppendToTop(list2.RemoveBottom()); } } } static nsIContent* FindContentInDocument(nsDisplayItem* aItem, nsIDocument* aDoc) { nsIFrame* f = aItem->Frame(); while (f) { nsPresContext* pc = f->PresContext(); if (pc->Document() == aDoc) { return f->GetContent(); } f = nsLayoutUtils::GetCrossDocParentFrame(pc->PresShell()->GetRootFrame()); } return nullptr; } static bool IsContentLEQ(nsDisplayItem* aItem1, nsDisplayItem* aItem2, void* aClosure) { nsIContent* commonAncestor = static_cast(aClosure); // It's possible that the nsIContent for aItem1 or aItem2 is in a subdocument // of commonAncestor, because display items for subdocuments have been // mixed into the same list. Ensure that we're looking at content // in commonAncestor's document. nsIDocument* commonAncestorDoc = commonAncestor->OwnerDoc(); nsIContent* content1 = FindContentInDocument(aItem1, commonAncestorDoc); nsIContent* content2 = FindContentInDocument(aItem2, commonAncestorDoc); if (!content1 || !content2) { NS_ERROR("Document trees are mixed up!"); // Something weird going on return true; } return nsLayoutUtils::CompareTreePosition(content1, content2, commonAncestor) <= 0; } static bool IsZOrderLEQ(nsDisplayItem* aItem1, nsDisplayItem* aItem2, void* aClosure) { // Note that we can't just take the difference of the two // z-indices here, because that might overflow a 32-bit int. return aItem1->ZIndex() <= aItem2->ZIndex(); } void nsDisplayList::SortByZOrder(nsDisplayListBuilder* aBuilder, nsIContent* aCommonAncestor) { Sort(aBuilder, IsZOrderLEQ, aCommonAncestor); } void nsDisplayList::SortByContentOrder(nsDisplayListBuilder* aBuilder, nsIContent* aCommonAncestor) { Sort(aBuilder, IsContentLEQ, aCommonAncestor); } void nsDisplayList::Sort(nsDisplayListBuilder* aBuilder, SortLEQ aCmp, void* aClosure) { ::Sort(this, Count(), aCmp, aClosure); } void nsDisplayItem::AddInvalidRegionForSyncDecodeBackgroundImages( nsDisplayListBuilder* aBuilder, const nsDisplayItemGeometry* aGeometry, nsRegion* aInvalidRegion) { if (aBuilder->ShouldSyncDecodeImages()) { if (!nsCSSRendering::AreAllBackgroundImagesDecodedForFrame(mFrame)) { bool snap; aInvalidRegion->Or(*aInvalidRegion, GetBounds(aBuilder, &snap)); } } } /* static */ bool nsDisplayItem::ForceActiveLayers() { static bool sForce = false; static bool sForceCached = false; if (!sForceCached) { Preferences::AddBoolVarCache(&sForce, "layers.force-active", false); sForceCached = true; } return sForce; } /* static */ int32_t nsDisplayItem::MaxActiveLayers() { static int32_t sMaxLayers = false; static bool sMaxLayersCached = false; if (!sMaxLayersCached) { Preferences::AddIntVarCache(&sMaxLayers, "layers.max-active", -1); sMaxLayersCached = true; } return sMaxLayers; } int32_t nsDisplayItem::ZIndex() const { if (!mFrame->IsPositioned() && !mFrame->IsFlexOrGridItem()) return 0; const nsStylePosition* position = mFrame->StylePosition(); if (position->mZIndex.GetUnit() == eStyleUnit_Integer) return position->mZIndex.GetIntValue(); // sort the auto and 0 elements together return 0; } bool nsDisplayItem::ComputeVisibility(nsDisplayListBuilder* aBuilder, nsRegion* aVisibleRegion, const nsRect& aAllowVisibleRegionExpansion) { return !mVisibleRect.IsEmpty() && !IsInvisibleInRect(aVisibleRegion->GetBounds()); } bool nsDisplayItem::RecomputeVisibility(nsDisplayListBuilder* aBuilder, nsRegion* aVisibleRegion) { nsRect bounds = GetClippedBounds(aBuilder); nsRegion itemVisible; itemVisible.And(*aVisibleRegion, bounds); mVisibleRect = itemVisible.GetBounds(); // When we recompute visibility within layers we don't need to // expand the visible region for content behind plugins (the plugin // is not in the layer). if (!ComputeVisibility(aBuilder, aVisibleRegion, nsRect())) return false; nsRegion opaque = TreatAsOpaque(this, aBuilder); aBuilder->SubtractFromVisibleRegion(aVisibleRegion, opaque); return true; } nsRect nsDisplayItem::GetClippedBounds(nsDisplayListBuilder* aBuilder) { bool snap; nsRect r = GetBounds(aBuilder, &snap); return GetClip().ApplyNonRoundedIntersection(r); } nsRect nsDisplaySolidColor::GetBounds(nsDisplayListBuilder* aBuilder, bool* aSnap) { *aSnap = true; return mBounds; } void nsDisplaySolidColor::Paint(nsDisplayListBuilder* aBuilder, nsRenderingContext* aCtx) { aCtx->SetColor(mColor); aCtx->FillRect(mVisibleRect); } #ifdef MOZ_DUMP_PAINTING void nsDisplaySolidColor::WriteDebugInfo(nsACString& aTo) { aTo += nsPrintfCString(" (rgba %d,%d,%d,%d)", NS_GET_R(mColor), NS_GET_G(mColor), NS_GET_B(mColor), NS_GET_A(mColor)); } #endif static void RegisterThemeGeometry(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame) { nsIFrame* displayRoot = nsLayoutUtils::GetDisplayRootFrame(aFrame); for (nsIFrame* f = aFrame; f; f = f->GetParent()) { // Bail out if we're in a transformed subtree if (f->IsTransformed()) return; // Bail out if we're not in the displayRoot's document if (!f->GetParent() && f != displayRoot) return; } nsRect borderBox(aFrame->GetOffsetTo(displayRoot), aFrame->GetSize()); aBuilder->RegisterThemeGeometry(aFrame->StyleDisplay()->mAppearance, borderBox.ToNearestPixels(aFrame->PresContext()->AppUnitsPerDevPixel())); } nsDisplayBackgroundImage::nsDisplayBackgroundImage(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame, uint32_t aLayer, const nsStyleBackground* aBackgroundStyle) : nsDisplayImageContainer(aBuilder, aFrame) , mBackgroundStyle(aBackgroundStyle) , mLayer(aLayer) { MOZ_COUNT_CTOR(nsDisplayBackgroundImage); mBounds = GetBoundsInternal(aBuilder); } nsDisplayBackgroundImage::~nsDisplayBackgroundImage() { #ifdef NS_BUILD_REFCNT_LOGGING MOZ_COUNT_DTOR(nsDisplayBackgroundImage); #endif } static nsStyleContext* GetBackgroundStyleContext(nsIFrame* aFrame) { nsStyleContext *sc; if (!nsCSSRendering::FindBackground(aFrame, &sc)) { // We don't want to bail out if moz-appearance is set on a root // node. If it has a parent content node, bail because it's not // a root, other wise keep going in order to let the theme stuff // draw the background. The canvas really should be drawing the // bg, but there's no way to hook that up via css. if (!aFrame->StyleDisplay()->mAppearance) { return nullptr; } nsIContent* content = aFrame->GetContent(); if (!content || content->GetParent()) { return nullptr; } sc = aFrame->StyleContext(); } return sc; } /*static*/ bool nsDisplayBackgroundImage::AppendBackgroundItemsToTop(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame, nsDisplayList* aList) { nsStyleContext* bgSC = nullptr; const nsStyleBackground* bg = nullptr; nsPresContext* presContext = aFrame->PresContext(); bool isThemed = aFrame->IsThemed(); if (!isThemed) { bgSC = GetBackgroundStyleContext(aFrame); if (bgSC) { bg = bgSC->StyleBackground(); } } bool drawBackgroundColor = false; nscolor color; if (!nsCSSRendering::IsCanvasFrame(aFrame) && bg) { bool drawBackgroundImage; color = nsCSSRendering::DetermineBackgroundColor(presContext, bgSC, aFrame, drawBackgroundImage, drawBackgroundColor); } // An auxiliary list is necessary in case we have background blending; if that // is the case, background items need to be wrapped by a blend container to // isolate blending to the background nsDisplayList bgItemList; // Even if we don't actually have a background color to paint, we may still need // to create an item for hit testing. if ((drawBackgroundColor && color != NS_RGBA(0,0,0,0)) || aBuilder->IsForEventDelivery()) { bgItemList.AppendNewToTop( new (aBuilder) nsDisplayBackgroundColor(aBuilder, aFrame, bg, drawBackgroundColor ? color : NS_RGBA(0, 0, 0, 0))); } if (isThemed) { nsDisplayThemedBackground* bgItem = new (aBuilder) nsDisplayThemedBackground(aBuilder, aFrame); bgItemList.AppendNewToTop(bgItem); aList->AppendToTop(&bgItemList); return true; } if (!bg) { aList->AppendToTop(&bgItemList); return false; } bool needBlendContainer = false; // Passing bg == nullptr in this macro will result in one iteration with // i = 0. NS_FOR_VISIBLE_BACKGROUND_LAYERS_BACK_TO_FRONT(i, bg) { if (bg->mLayers[i].mImage.IsEmpty()) { continue; } if (bg->mLayers[i].mBlendMode != NS_STYLE_BLEND_NORMAL) { needBlendContainer = true; } nsDisplayBackgroundImage* bgItem = new (aBuilder) nsDisplayBackgroundImage(aBuilder, aFrame, i, bg); bgItemList.AppendNewToTop(bgItem); } if (needBlendContainer) { bgItemList.AppendNewToTop( new (aBuilder) nsDisplayBlendContainer(aBuilder, aFrame, &bgItemList)); } aList->AppendToTop(&bgItemList); return false; } // Check that the rounded border of aFrame, added to aToReferenceFrame, // intersects aRect. Assumes that the unrounded border has already // been checked for intersection. static bool RoundedBorderIntersectsRect(nsIFrame* aFrame, const nsPoint& aFrameToReferenceFrame, const nsRect& aTestRect) { if (!nsRect(aFrameToReferenceFrame, aFrame->GetSize()).Intersects(aTestRect)) return false; nscoord radii[8]; return !aFrame->GetBorderRadii(radii) || nsLayoutUtils::RoundedRectIntersectsRect(nsRect(aFrameToReferenceFrame, aFrame->GetSize()), radii, aTestRect); } // Returns TRUE if aContainedRect is guaranteed to be contained in // the rounded rect defined by aRoundedRect and aRadii. Complex cases are // handled conservatively by returning FALSE in some situations where // a more thorough analysis could return TRUE. // // See also RoundedRectIntersectsRect. static bool RoundedRectContainsRect(const nsRect& aRoundedRect, const nscoord aRadii[8], const nsRect& aContainedRect) { nsRegion rgn = nsLayoutUtils::RoundedRectIntersectRect(aRoundedRect, aRadii, aContainedRect); return rgn.Contains(aContainedRect); } bool nsDisplayBackgroundImage::IsSingleFixedPositionImage(nsDisplayListBuilder* aBuilder, const nsRect& aClipRect, gfxRect* aDestRect) { if (!mBackgroundStyle) return false; if (mBackgroundStyle->mLayers.Length() != 1) return false; nsPresContext* presContext = mFrame->PresContext(); uint32_t flags = aBuilder->GetBackgroundPaintFlags(); nsRect borderArea = nsRect(ToReferenceFrame(), mFrame->GetSize()); const nsStyleBackground::Layer &layer = mBackgroundStyle->mLayers[mLayer]; if (layer.mAttachment != NS_STYLE_BG_ATTACHMENT_FIXED) return false; nsBackgroundLayerState state = nsCSSRendering::PrepareBackgroundLayer(presContext, mFrame, flags, borderArea, aClipRect, layer); nsImageRenderer* imageRenderer = &state.mImageRenderer; // We only care about images here, not gradients. if (!imageRenderer->IsRasterImage()) return false; int32_t appUnitsPerDevPixel = presContext->AppUnitsPerDevPixel(); *aDestRect = nsLayoutUtils::RectToGfxRect(state.mFillArea, appUnitsPerDevPixel); return true; } bool nsDisplayBackgroundImage::TryOptimizeToImageLayer(LayerManager* aManager, nsDisplayListBuilder* aBuilder) { if (!mBackgroundStyle) return false; nsPresContext* presContext = mFrame->PresContext(); uint32_t flags = aBuilder->GetBackgroundPaintFlags(); nsRect borderArea = nsRect(ToReferenceFrame(), mFrame->GetSize()); const nsStyleBackground::Layer &layer = mBackgroundStyle->mLayers[mLayer]; if (layer.mClip != NS_STYLE_BG_CLIP_BORDER) { return false; } nscoord radii[8]; if (mFrame->GetBorderRadii(radii)) { return false; } nsBackgroundLayerState state = nsCSSRendering::PrepareBackgroundLayer(presContext, mFrame, flags, borderArea, borderArea, layer); nsImageRenderer* imageRenderer = &state.mImageRenderer; // We only care about images here, not gradients. if (!imageRenderer->IsRasterImage()) return false; nsRefPtr imageContainer = imageRenderer->GetContainer(aManager); // Image is not ready to be made into a layer yet if (!imageContainer) return false; // We currently can't handle tiled or partial backgrounds. if (!state.mDestArea.IsEqualEdges(state.mFillArea)) { return false; } // XXX Ignoring state.mAnchor. ImageLayer drawing snaps mDestArea edges to // layer pixel boundaries. This should be OK for now. int32_t appUnitsPerDevPixel = presContext->AppUnitsPerDevPixel(); mDestRect = nsLayoutUtils::RectToGfxRect(state.mDestArea, appUnitsPerDevPixel); mImageContainer = imageContainer; // Ok, we can turn this into a layer if needed. return true; } already_AddRefed nsDisplayBackgroundImage::GetContainer(LayerManager* aManager, nsDisplayListBuilder *aBuilder) { if (!TryOptimizeToImageLayer(aManager, aBuilder)) { return nullptr; } nsRefPtr container = mImageContainer; return container.forget(); } LayerState nsDisplayBackgroundImage::GetLayerState(nsDisplayListBuilder* aBuilder, LayerManager* aManager, const ContainerLayerParameters& aParameters) { bool animated = false; if (mBackgroundStyle) { const nsStyleBackground::Layer &layer = mBackgroundStyle->mLayers[mLayer]; const nsStyleImage* image = &layer.mImage; if (image->GetType() == eStyleImageType_Image) { imgIRequest* imgreq = image->GetImageData(); nsCOMPtr image; if (NS_SUCCEEDED(imgreq->GetImage(getter_AddRefs(image))) && image) { if (NS_FAILED(image->GetAnimated(&animated))) { animated = false; } } } } if (!animated || !nsLayoutUtils::AnimatedImageLayersEnabled()) { if (!aManager->IsCompositingCheap() || !nsLayoutUtils::GPUImageScalingEnabled()) { return LAYER_NONE; } } if (!TryOptimizeToImageLayer(aManager, aBuilder)) { return LAYER_NONE; } if (!animated) { mozilla::gfx::IntSize imageSize = mImageContainer->GetCurrentSize(); NS_ASSERTION(imageSize.width != 0 && imageSize.height != 0, "Invalid image size!"); gfxRect destRect = mDestRect; destRect.width *= aParameters.mXScale; destRect.height *= aParameters.mYScale; // Calculate the scaling factor for the frame. gfxSize scale = gfxSize(destRect.width / imageSize.width, destRect.height / imageSize.height); // If we are not scaling at all, no point in separating this into a layer. if (scale.width == 1.0f && scale.height == 1.0f) { return LAYER_NONE; } // If the target size is pretty small, no point in using a layer. if (destRect.width * destRect.height < 64 * 64) { return LAYER_NONE; } } return LAYER_ACTIVE; } already_AddRefed nsDisplayBackgroundImage::BuildLayer(nsDisplayListBuilder* aBuilder, LayerManager* aManager, const ContainerLayerParameters& aParameters) { nsRefPtr layer = static_cast (aManager->GetLayerBuilder()->GetLeafLayerFor(aBuilder, this)); if (!layer) { layer = aManager->CreateImageLayer(); if (!layer) return nullptr; } layer->SetContainer(mImageContainer); ConfigureLayer(layer, aParameters.mOffset); return layer.forget(); } void nsDisplayBackgroundImage::ConfigureLayer(ImageLayer* aLayer, const nsIntPoint& aOffset) { aLayer->SetFilter(nsLayoutUtils::GetGraphicsFilterForFrame(mFrame)); mozilla::gfx::IntSize imageSize = mImageContainer->GetCurrentSize(); NS_ASSERTION(imageSize.width != 0 && imageSize.height != 0, "Invalid image size!"); gfxPoint p = mDestRect.TopLeft() + aOffset; gfx::Matrix transform; transform.Translate(p.x, p.y); transform.Scale(mDestRect.width/imageSize.width, mDestRect.height/imageSize.height); aLayer->SetBaseTransform(gfx::Matrix4x4::From2D(transform)); aLayer->SetVisibleRegion(nsIntRect(0, 0, imageSize.width, imageSize.height)); } void nsDisplayBackgroundImage::HitTest(nsDisplayListBuilder* aBuilder, const nsRect& aRect, HitTestState* aState, nsTArray *aOutFrames) { if (RoundedBorderIntersectsRect(mFrame, ToReferenceFrame(), aRect)) { aOutFrames->AppendElement(mFrame); } } bool nsDisplayBackgroundImage::ComputeVisibility(nsDisplayListBuilder* aBuilder, nsRegion* aVisibleRegion, const nsRect& aAllowVisibleRegionExpansion) { if (!nsDisplayItem::ComputeVisibility(aBuilder, aVisibleRegion, aAllowVisibleRegionExpansion)) { return false; } // Return false if the background was propagated away from this // frame. We don't want this display item to show up and confuse // anything. return mBackgroundStyle; } /* static */ nsRegion nsDisplayBackgroundImage::GetInsideClipRegion(nsDisplayItem* aItem, nsPresContext* aPresContext, uint8_t aClip, const nsRect& aRect, bool* aSnap) { nsRegion result; if (aRect.IsEmpty()) return result; nsIFrame *frame = aItem->Frame(); nscoord radii[8]; nsRect clipRect; bool haveRadii; if (frame->GetType() == nsGkAtoms::canvasFrame) { nsCanvasFrame* canvasFrame = static_cast(frame); haveRadii = false; clipRect = canvasFrame->CanvasArea() + aItem->ToReferenceFrame(); } else { switch (aClip) { case NS_STYLE_BG_CLIP_BORDER: haveRadii = frame->GetBorderRadii(radii); clipRect = nsRect(aItem->ToReferenceFrame(), frame->GetSize()); break; case NS_STYLE_BG_CLIP_PADDING: haveRadii = frame->GetPaddingBoxBorderRadii(radii); clipRect = frame->GetPaddingRect() - frame->GetPosition() + aItem->ToReferenceFrame(); break; case NS_STYLE_BG_CLIP_CONTENT: haveRadii = frame->GetContentBoxBorderRadii(radii); clipRect = frame->GetContentRect() - frame->GetPosition() + aItem->ToReferenceFrame(); break; default: NS_NOTREACHED("Unknown clip type"); return result; } } if (haveRadii) { *aSnap = false; result = nsLayoutUtils::RoundedRectIntersectRect(clipRect, radii, aRect); } else { result = clipRect.Intersect(aRect); } return result; } nsRegion nsDisplayBackgroundImage::GetOpaqueRegion(nsDisplayListBuilder* aBuilder, bool* aSnap) { nsRegion result; *aSnap = false; if (!mBackgroundStyle) return result; *aSnap = true; // For NS_STYLE_BOX_DECORATION_BREAK_SLICE, don't try to optimize here, since // this could easily lead to O(N^2) behavior inside InlineBackgroundData, // which expects frames to be sent to it in content order, not reverse // content order which we'll produce here. // Of course, if there's only one frame in the flow, it doesn't matter. if (mFrame->StyleBorder()->mBoxDecorationBreak == NS_STYLE_BOX_DECORATION_BREAK_CLONE || (!mFrame->GetPrevContinuation() && !mFrame->GetNextContinuation())) { const nsStyleBackground::Layer& layer = mBackgroundStyle->mLayers[mLayer]; if (layer.mImage.IsOpaque() && layer.mBlendMode == NS_STYLE_BLEND_NORMAL) { nsPresContext* presContext = mFrame->PresContext(); result = GetInsideClipRegion(this, presContext, layer.mClip, mBounds, aSnap); } } return result; } bool nsDisplayBackgroundImage::IsUniform(nsDisplayListBuilder* aBuilder, nscolor* aColor) { if (!mBackgroundStyle) { *aColor = NS_RGBA(0,0,0,0); return true; } return false; } bool nsDisplayBackgroundImage::IsVaryingRelativeToMovingFrame(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame) { if (!mBackgroundStyle) return false; if (!mBackgroundStyle->HasFixedBackground()) return false; // If aFrame is mFrame or an ancestor in this document, and aFrame is // not the viewport frame, then moving aFrame will move mFrame // relative to the viewport, so our fixed-pos background will change. return aFrame->GetParent() && (aFrame == mFrame || nsLayoutUtils::IsProperAncestorFrame(aFrame, mFrame)); } nsRect nsDisplayBackgroundImage::GetPositioningArea() { if (!mBackgroundStyle) { return nsRect(); } nsIFrame* attachedToFrame; return nsCSSRendering::ComputeBackgroundPositioningArea( mFrame->PresContext(), mFrame, nsRect(ToReferenceFrame(), mFrame->GetSize()), mBackgroundStyle->mLayers[mLayer], &attachedToFrame) + ToReferenceFrame(); } bool nsDisplayBackgroundImage::RenderingMightDependOnPositioningAreaSizeChange() { if (!mBackgroundStyle) return false; nscoord radii[8]; if (mFrame->GetBorderRadii(radii)) { // A change in the size of the positioning area might change the position // of the rounded corners. return true; } const nsStyleBackground::Layer &layer = mBackgroundStyle->mLayers[mLayer]; if (layer.RenderingMightDependOnPositioningAreaSizeChange()) { return true; } return false; } static void CheckForBorderItem(nsDisplayItem *aItem, uint32_t& aFlags) { nsDisplayItem* nextItem = aItem->GetAbove(); while (nextItem && nextItem->GetType() == nsDisplayItem::TYPE_BACKGROUND) { nextItem = nextItem->GetAbove(); } if (nextItem && nextItem->Frame() == aItem->Frame() && nextItem->GetType() == nsDisplayItem::TYPE_BORDER) { aFlags |= nsCSSRendering::PAINTBG_WILL_PAINT_BORDER; } } void nsDisplayBackgroundImage::Paint(nsDisplayListBuilder* aBuilder, nsRenderingContext* aCtx) { PaintInternal(aBuilder, aCtx, mVisibleRect, nullptr); } void nsDisplayBackgroundImage::PaintInternal(nsDisplayListBuilder* aBuilder, nsRenderingContext* aCtx, const nsRect& aBounds, nsRect* aClipRect) { nsPoint offset = ToReferenceFrame(); uint32_t flags = aBuilder->GetBackgroundPaintFlags(); CheckForBorderItem(this, flags); nsCSSRendering::PaintBackground(mFrame->PresContext(), *aCtx, mFrame, aBounds, nsRect(offset, mFrame->GetSize()), flags, aClipRect, mLayer); } void nsDisplayBackgroundImage::ComputeInvalidationRegion(nsDisplayListBuilder* aBuilder, const nsDisplayItemGeometry* aGeometry, nsRegion* aInvalidRegion) { if (!mBackgroundStyle) { return; } const nsDisplayBackgroundGeometry* geometry = static_cast(aGeometry); bool snap; nsRect bounds = GetBounds(aBuilder, &snap); nsRect positioningArea = GetPositioningArea(); if (positioningArea.TopLeft() != geometry->mPositioningArea.TopLeft() || (positioningArea.Size() != geometry->mPositioningArea.Size() && RenderingMightDependOnPositioningAreaSizeChange())) { // Positioning area changed in a way that could cause everything to change, // so invalidate everything (both old and new painting areas). aInvalidRegion->Or(bounds, geometry->mBounds); if (positioningArea.Size() != geometry->mPositioningArea.Size()) { NotifyRenderingChanged(); } return; } if (aBuilder->ShouldSyncDecodeImages()) { if (mBackgroundStyle && !nsCSSRendering::IsBackgroundImageDecodedForStyleContextAndLayer(mBackgroundStyle, mLayer)) { aInvalidRegion->Or(*aInvalidRegion, bounds); NotifyRenderingChanged(); } } if (!bounds.IsEqualInterior(geometry->mBounds)) { // Positioning area is unchanged, so invalidate just the change in the // painting area. aInvalidRegion->Xor(bounds, geometry->mBounds); NotifyRenderingChanged(); } } nsRect nsDisplayBackgroundImage::GetBounds(nsDisplayListBuilder* aBuilder, bool* aSnap) { *aSnap = true; return mBounds; } nsRect nsDisplayBackgroundImage::GetBoundsInternal(nsDisplayListBuilder* aBuilder) { nsPresContext* presContext = mFrame->PresContext(); if (!mBackgroundStyle) { return nsRect(); } nsRect borderBox = nsRect(ToReferenceFrame(), mFrame->GetSize()); nsRect clipRect = borderBox; if (mFrame->GetType() == nsGkAtoms::canvasFrame) { nsCanvasFrame* frame = static_cast(mFrame); clipRect = frame->CanvasArea() + ToReferenceFrame(); } const nsStyleBackground::Layer& layer = mBackgroundStyle->mLayers[mLayer]; return nsCSSRendering::GetBackgroundLayerRect(presContext, mFrame, borderBox, clipRect, layer, aBuilder->GetBackgroundPaintFlags()); } uint32_t nsDisplayBackgroundImage::GetPerFrameKey() { return (mLayer << nsDisplayItem::TYPE_BITS) | nsDisplayItem::GetPerFrameKey(); } nsDisplayThemedBackground::nsDisplayThemedBackground(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame) : nsDisplayItem(aBuilder, aFrame) { MOZ_COUNT_CTOR(nsDisplayThemedBackground); const nsStyleDisplay* disp = mFrame->StyleDisplay(); mAppearance = disp->mAppearance; mFrame->IsThemed(disp, &mThemeTransparency); // Perform necessary RegisterThemeGeometry switch (disp->mAppearance) { case NS_THEME_MOZ_MAC_UNIFIED_TOOLBAR: case NS_THEME_TOOLBAR: case NS_THEME_WINDOW_TITLEBAR: case NS_THEME_WINDOW_BUTTON_BOX: case NS_THEME_MOZ_MAC_FULLSCREEN_BUTTON: case NS_THEME_WINDOW_BUTTON_BOX_MAXIMIZED: RegisterThemeGeometry(aBuilder, aFrame); break; case NS_THEME_WIN_BORDERLESS_GLASS: case NS_THEME_WIN_GLASS: aBuilder->SetGlassDisplayItem(this); break; } mBounds = GetBoundsInternal(); } nsDisplayThemedBackground::~nsDisplayThemedBackground() { #ifdef NS_BUILD_REFCNT_LOGGING MOZ_COUNT_DTOR(nsDisplayThemedBackground); #endif } #ifdef MOZ_DUMP_PAINTING void nsDisplayThemedBackground::WriteDebugInfo(nsACString& aTo) { aTo += nsPrintfCString(" (themed, appearance:%d)", mAppearance); } #endif void nsDisplayThemedBackground::HitTest(nsDisplayListBuilder* aBuilder, const nsRect& aRect, HitTestState* aState, nsTArray *aOutFrames) { // Assume that any point in our border rect is a hit. if (nsRect(ToReferenceFrame(), mFrame->GetSize()).Intersects(aRect)) { aOutFrames->AppendElement(mFrame); } } nsRegion nsDisplayThemedBackground::GetOpaqueRegion(nsDisplayListBuilder* aBuilder, bool* aSnap) { nsRegion result; *aSnap = false; if (mThemeTransparency == nsITheme::eOpaque) { result = nsRect(ToReferenceFrame(), mFrame->GetSize()); } return result; } bool nsDisplayThemedBackground::IsUniform(nsDisplayListBuilder* aBuilder, nscolor* aColor) { if (mAppearance == NS_THEME_WIN_BORDERLESS_GLASS || mAppearance == NS_THEME_WIN_GLASS) { *aColor = NS_RGBA(0,0,0,0); return true; } return false; } nsRect nsDisplayThemedBackground::GetPositioningArea() { return nsRect(ToReferenceFrame(), mFrame->GetSize()); } void nsDisplayThemedBackground::Paint(nsDisplayListBuilder* aBuilder, nsRenderingContext* aCtx) { PaintInternal(aBuilder, aCtx, mVisibleRect, nullptr); } void nsDisplayThemedBackground::PaintInternal(nsDisplayListBuilder* aBuilder, nsRenderingContext* aCtx, const nsRect& aBounds, nsRect* aClipRect) { // XXXzw this ignores aClipRect. nsPresContext* presContext = mFrame->PresContext(); nsITheme *theme = presContext->GetTheme(); nsRect borderArea(ToReferenceFrame(), mFrame->GetSize()); nsRect drawing(borderArea); theme->GetWidgetOverflow(presContext->DeviceContext(), mFrame, mAppearance, &drawing); drawing.IntersectRect(drawing, aBounds); theme->DrawWidgetBackground(aCtx, mFrame, mAppearance, borderArea, drawing); } bool nsDisplayThemedBackground::IsWindowActive() { EventStates docState = mFrame->GetContent()->OwnerDoc()->GetDocumentState(); return !docState.HasState(NS_DOCUMENT_STATE_WINDOW_INACTIVE); } void nsDisplayThemedBackground::ComputeInvalidationRegion(nsDisplayListBuilder* aBuilder, const nsDisplayItemGeometry* aGeometry, nsRegion* aInvalidRegion) { const nsDisplayThemedBackgroundGeometry* geometry = static_cast(aGeometry); bool snap; nsRect bounds = GetBounds(aBuilder, &snap); nsRect positioningArea = GetPositioningArea(); if (!positioningArea.IsEqualInterior(geometry->mPositioningArea)) { // Invalidate everything (both old and new painting areas). aInvalidRegion->Or(bounds, geometry->mBounds); return; } if (!bounds.IsEqualInterior(geometry->mBounds)) { // Positioning area is unchanged, so invalidate just the change in the // painting area. aInvalidRegion->Xor(bounds, geometry->mBounds); } nsITheme* theme = mFrame->PresContext()->GetTheme(); if (theme->WidgetAppearanceDependsOnWindowFocus(mAppearance) && IsWindowActive() != geometry->mWindowIsActive) { aInvalidRegion->Or(*aInvalidRegion, bounds); } } nsRect nsDisplayThemedBackground::GetBounds(nsDisplayListBuilder* aBuilder, bool* aSnap) { *aSnap = true; return mBounds; } nsRect nsDisplayThemedBackground::GetBoundsInternal() { nsPresContext* presContext = mFrame->PresContext(); nsRect r(nsPoint(0,0), mFrame->GetSize()); presContext->GetTheme()-> GetWidgetOverflow(presContext->DeviceContext(), mFrame, mFrame->StyleDisplay()->mAppearance, &r); #ifdef XP_MACOSX // Bug 748219 r.Inflate(mFrame->PresContext()->AppUnitsPerDevPixel()); #endif return r + ToReferenceFrame(); } void nsDisplayBackgroundColor::Paint(nsDisplayListBuilder* aBuilder, nsRenderingContext* aCtx) { if (mColor == NS_RGBA(0, 0, 0, 0)) { return; } nsPoint offset = ToReferenceFrame(); uint32_t flags = aBuilder->GetBackgroundPaintFlags(); CheckForBorderItem(this, flags); nsCSSRendering::PaintBackgroundColor(mFrame->PresContext(), *aCtx, mFrame, mVisibleRect, nsRect(offset, mFrame->GetSize()), flags); } nsRegion nsDisplayBackgroundColor::GetOpaqueRegion(nsDisplayListBuilder* aBuilder, bool* aSnap) { if (NS_GET_A(mColor) != 255) { return nsRegion(); } if (!mBackgroundStyle) return nsRegion(); *aSnap = true; const nsStyleBackground::Layer& bottomLayer = mBackgroundStyle->BottomLayer(); nsRect borderBox = nsRect(ToReferenceFrame(), mFrame->GetSize()); nsPresContext* presContext = mFrame->PresContext(); return nsDisplayBackgroundImage::GetInsideClipRegion(this, presContext, bottomLayer.mClip, borderBox, aSnap); } bool nsDisplayBackgroundColor::IsUniform(nsDisplayListBuilder* aBuilder, nscolor* aColor) { *aColor = mColor; if (!mBackgroundStyle) return true; return (!nsLayoutUtils::HasNonZeroCorner(mFrame->StyleBorder()->mBorderRadius) && mBackgroundStyle->BottomLayer().mClip == NS_STYLE_BG_CLIP_BORDER); } void nsDisplayBackgroundColor::HitTest(nsDisplayListBuilder* aBuilder, const nsRect& aRect, HitTestState* aState, nsTArray *aOutFrames) { if (!RoundedBorderIntersectsRect(mFrame, ToReferenceFrame(), aRect)) { // aRect doesn't intersect our border-radius curve. return; } aOutFrames->AppendElement(mFrame); } #ifdef MOZ_DUMP_PAINTING void nsDisplayBackgroundColor::WriteDebugInfo(nsACString& aTo) { aTo += nsPrintfCString(" (rgba %d,%d,%d,%d)", NS_GET_R(mColor), NS_GET_G(mColor), NS_GET_B(mColor), NS_GET_A(mColor)); } #endif nsRect nsDisplayOutline::GetBounds(nsDisplayListBuilder* aBuilder, bool* aSnap) { *aSnap = false; return mFrame->GetVisualOverflowRectRelativeToSelf() + ToReferenceFrame(); } void nsDisplayOutline::Paint(nsDisplayListBuilder* aBuilder, nsRenderingContext* aCtx) { // TODO join outlines together nsPoint offset = ToReferenceFrame(); nsCSSRendering::PaintOutline(mFrame->PresContext(), *aCtx, mFrame, mVisibleRect, nsRect(offset, mFrame->GetSize()), mFrame->StyleContext()); } bool nsDisplayOutline::IsInvisibleInRect(const nsRect& aRect) { const nsStyleOutline* outline = mFrame->StyleOutline(); nsRect borderBox(ToReferenceFrame(), mFrame->GetSize()); if (borderBox.Contains(aRect) && !nsLayoutUtils::HasNonZeroCorner(outline->mOutlineRadius)) { if (outline->mOutlineOffset >= 0) { // aRect is entirely inside the border-rect, and the outline isn't // rendered inside the border-rect, so the outline is not visible. return true; } } return false; } void nsDisplayEventReceiver::HitTest(nsDisplayListBuilder* aBuilder, const nsRect& aRect, HitTestState* aState, nsTArray *aOutFrames) { if (!RoundedBorderIntersectsRect(mFrame, ToReferenceFrame(), aRect)) { // aRect doesn't intersect our border-radius curve. return; } aOutFrames->AppendElement(mFrame); } void nsDisplayLayerEventRegions::AddFrame(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame) { NS_ASSERTION(aBuilder->FindReferenceFrameFor(aFrame) == aBuilder->FindReferenceFrameFor(mFrame), "Reference frame mismatch"); uint8_t pointerEvents = aFrame->StyleVisibility()->mPointerEvents; if (pointerEvents == NS_STYLE_POINTER_EVENTS_NONE) { return; } // XXX handle other pointerEvents values for SVG // XXX Do something clever here for the common case where the border box // is obviously entirely inside mHitRegion. nsRect borderBox(aBuilder->ToReferenceFrame(aFrame), aFrame->GetSize()); const DisplayItemClip* clip = aBuilder->ClipState().GetCurrentCombinedClip(aBuilder); bool borderBoxHasRoundedCorners = nsLayoutUtils::HasNonZeroCorner(aFrame->StyleBorder()->mBorderRadius); if (clip) { borderBox = clip->ApplyNonRoundedIntersection(borderBox); if (clip->GetRoundedRectCount() > 0) { borderBoxHasRoundedCorners = true; } } if (borderBoxHasRoundedCorners || (aFrame->GetStateBits() & NS_FRAME_SVG_LAYOUT)) { mMaybeHitRegion.Or(mMaybeHitRegion, borderBox); } else { mHitRegion.Or(mHitRegion, borderBox); } if (aBuilder->GetAncestorHasTouchEventHandler()) { mDispatchToContentHitRegion.Or(mDispatchToContentHitRegion, borderBox); } } void nsDisplayCaret::Paint(nsDisplayListBuilder* aBuilder, nsRenderingContext* aCtx) { // Note: Because we exist, we know that the caret is visible, so we don't // need to check for the caret's visibility. mCaret->PaintCaret(aBuilder, aCtx, mFrame, ToReferenceFrame()); } bool nsDisplayBorder::IsInvisibleInRect(const nsRect& aRect) { nsRect paddingRect = mFrame->GetPaddingRect() - mFrame->GetPosition() + ToReferenceFrame(); const nsStyleBorder *styleBorder; if (paddingRect.Contains(aRect) && !(styleBorder = mFrame->StyleBorder())->IsBorderImageLoaded() && !nsLayoutUtils::HasNonZeroCorner(styleBorder->mBorderRadius)) { // aRect is entirely inside the content rect, and no part // of the border is rendered inside the content rect, so we are not // visible // Skip this if there's a border-image (which draws a background // too) or if there is a border-radius (which makes the border draw // further in). return true; } return false; } nsDisplayItemGeometry* nsDisplayBorder::AllocateGeometry(nsDisplayListBuilder* aBuilder) { return new nsDisplayBorderGeometry(this, aBuilder); } void nsDisplayBorder::ComputeInvalidationRegion(nsDisplayListBuilder* aBuilder, const nsDisplayItemGeometry* aGeometry, nsRegion* aInvalidRegion) { const nsDisplayBorderGeometry* geometry = static_cast(aGeometry); bool snap; if (!geometry->mBounds.IsEqualInterior(GetBounds(aBuilder, &snap)) || !geometry->mContentRect.IsEqualInterior(GetContentRect())) { // We can probably get away with only invalidating the difference // between the border and padding rects, but the XUL ui at least // is apparently painting a background with this? aInvalidRegion->Or(GetBounds(aBuilder, &snap), geometry->mBounds); } } void nsDisplayBorder::Paint(nsDisplayListBuilder* aBuilder, nsRenderingContext* aCtx) { nsPoint offset = ToReferenceFrame(); nsCSSRendering::PaintBorder(mFrame->PresContext(), *aCtx, mFrame, mVisibleRect, nsRect(offset, mFrame->GetSize()), mFrame->StyleContext(), mFrame->GetSkipSides()); } nsRect nsDisplayBorder::GetBounds(nsDisplayListBuilder* aBuilder, bool* aSnap) { *aSnap = true; return CalculateBounds(*mFrame->StyleBorder()); } nsRect nsDisplayBorder::CalculateBounds(const nsStyleBorder& aStyleBorder) { nsRect borderBounds(ToReferenceFrame(), mFrame->GetSize()); if (aStyleBorder.IsBorderImageLoaded()) { borderBounds.Inflate(aStyleBorder.GetImageOutset()); return borderBounds; } else { nsMargin border = aStyleBorder.GetComputedBorder(); nsRect result; if (border.top > 0) { result = nsRect(borderBounds.X(), borderBounds.Y(), borderBounds.Width(), border.top); } if (border.right > 0) { result.UnionRect(result, nsRect(borderBounds.XMost() - border.right, borderBounds.Y(), border.right, borderBounds.Height())); } if (border.bottom > 0) { result.UnionRect(result, nsRect(borderBounds.X(), borderBounds.YMost() - border.bottom, borderBounds.Width(), border.bottom)); } if (border.left > 0) { result.UnionRect(result, nsRect(borderBounds.X(), borderBounds.Y(), border.left, borderBounds.Height())); } return result; } } // Given a region, compute a conservative approximation to it as a list // of rectangles that aren't vertically adjacent (i.e., vertically // adjacent or overlapping rectangles are combined). // Right now this is only approximate, some vertically overlapping rectangles // aren't guaranteed to be combined. static void ComputeDisjointRectangles(const nsRegion& aRegion, nsTArray* aRects) { nscoord accumulationMargin = nsPresContext::CSSPixelsToAppUnits(25); nsRect accumulated; nsRegionRectIterator iter(aRegion); while (true) { const nsRect* r = iter.Next(); if (r && !accumulated.IsEmpty() && accumulated.YMost() >= r->y - accumulationMargin) { accumulated.UnionRect(accumulated, *r); continue; } if (!accumulated.IsEmpty()) { aRects->AppendElement(accumulated); accumulated.SetEmpty(); } if (!r) break; accumulated = *r; } } void nsDisplayBoxShadowOuter::Paint(nsDisplayListBuilder* aBuilder, nsRenderingContext* aCtx) { nsPoint offset = ToReferenceFrame(); nsRect borderRect = mFrame->VisualBorderRectRelativeToSelf() + offset; nsPresContext* presContext = mFrame->PresContext(); nsAutoTArray rects; ComputeDisjointRectangles(mVisibleRegion, &rects); PROFILER_LABEL("nsDisplayBoxShadowOuter", "Paint", js::ProfileEntry::Category::GRAPHICS); for (uint32_t i = 0; i < rects.Length(); ++i) { nsCSSRendering::PaintBoxShadowOuter(presContext, *aCtx, mFrame, borderRect, rects[i], mOpacity); } } nsRect nsDisplayBoxShadowOuter::GetBounds(nsDisplayListBuilder* aBuilder, bool* aSnap) { *aSnap = false; return mBounds; } nsRect nsDisplayBoxShadowOuter::GetBoundsInternal() { return nsLayoutUtils::GetBoxShadowRectForFrame(mFrame, mFrame->GetSize()) + ToReferenceFrame(); } bool nsDisplayBoxShadowOuter::IsInvisibleInRect(const nsRect& aRect) { nsPoint origin = ToReferenceFrame(); nsRect frameRect(origin, mFrame->GetSize()); if (!frameRect.Contains(aRect)) return false; // the visible region is entirely inside the border-rect, and box shadows // never render within the border-rect (unless there's a border radius). nscoord twipsRadii[8]; bool hasBorderRadii = mFrame->GetBorderRadii(twipsRadii); if (!hasBorderRadii) return true; return RoundedRectContainsRect(frameRect, twipsRadii, aRect); } bool nsDisplayBoxShadowOuter::ComputeVisibility(nsDisplayListBuilder* aBuilder, nsRegion* aVisibleRegion, const nsRect& aAllowVisibleRegionExpansion) { if (!nsDisplayItem::ComputeVisibility(aBuilder, aVisibleRegion, aAllowVisibleRegionExpansion)) { return false; } // Store the actual visible region mVisibleRegion.And(*aVisibleRegion, mVisibleRect); return true; } void nsDisplayBoxShadowOuter::ComputeInvalidationRegion(nsDisplayListBuilder* aBuilder, const nsDisplayItemGeometry* aGeometry, nsRegion* aInvalidRegion) { const nsDisplayItemGenericGeometry* geometry = static_cast(aGeometry); bool snap; if (!geometry->mBounds.IsEqualInterior(GetBounds(aBuilder, &snap)) || !geometry->mBorderRect.IsEqualInterior(GetBorderRect())) { nsRegion oldShadow, newShadow; nscoord dontCare[8]; bool hasBorderRadius = mFrame->GetBorderRadii(dontCare); if (hasBorderRadius) { // If we have rounded corners then we need to invalidate the frame area // too since we paint into it. oldShadow = geometry->mBounds; newShadow = GetBounds(aBuilder, &snap); } else { oldShadow = oldShadow.Sub(geometry->mBounds, geometry->mBorderRect); newShadow = newShadow.Sub(GetBounds(aBuilder, &snap), GetBorderRect()); } aInvalidRegion->Or(oldShadow, newShadow); } } void nsDisplayBoxShadowInner::Paint(nsDisplayListBuilder* aBuilder, nsRenderingContext* aCtx) { nsPoint offset = ToReferenceFrame(); nsRect borderRect = nsRect(offset, mFrame->GetSize()); nsPresContext* presContext = mFrame->PresContext(); nsAutoTArray rects; ComputeDisjointRectangles(mVisibleRegion, &rects); PROFILER_LABEL("nsDisplayBoxShadowInner", "Paint", js::ProfileEntry::Category::GRAPHICS); for (uint32_t i = 0; i < rects.Length(); ++i) { aCtx->PushState(); aCtx->IntersectClip(rects[i]); nsCSSRendering::PaintBoxShadowInner(presContext, *aCtx, mFrame, borderRect, rects[i]); aCtx->PopState(); } } bool nsDisplayBoxShadowInner::ComputeVisibility(nsDisplayListBuilder* aBuilder, nsRegion* aVisibleRegion, const nsRect& aAllowVisibleRegionExpansion) { if (!nsDisplayItem::ComputeVisibility(aBuilder, aVisibleRegion, aAllowVisibleRegionExpansion)) { return false; } // Store the actual visible region mVisibleRegion.And(*aVisibleRegion, mVisibleRect); return true; } nsDisplayWrapList::nsDisplayWrapList(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame, nsDisplayList* aList) : nsDisplayItem(aBuilder, aFrame) , mOverrideZIndex(0) { mList.AppendToTop(aList); UpdateBounds(aBuilder); if (!aFrame || !aFrame->IsTransformed()) { return; } // If the frame is a preserve-3d parent, then we will create transforms // inside this list afterwards (see WrapPreserve3DList in nsFrame.cpp). // In this case we will always be outside of the transform, so share // our parents reference frame. if (aFrame->Preserves3DChildren()) { mReferenceFrame = aBuilder->FindReferenceFrameFor(GetTransformRootFrame(aFrame)); mToReferenceFrame = aFrame->GetOffsetToCrossDoc(mReferenceFrame); return; } // If we're a transformed frame, then we need to find out if we're inside // the nsDisplayTransform or outside of it. Frames inside the transform // need mReferenceFrame == mFrame, outside needs the next ancestor // reference frame. // If we're inside the transform, then the nsDisplayItem constructor // will have done the right thing. // If we're outside the transform, then we should have only one child // (since nsDisplayTransform wraps all actual content), and that child // will have the correct reference frame set (since nsDisplayTransform // handles this explictly). // // Preserve-3d can cause us to have multiple nsDisplayTransform // children. nsDisplayItem *i = mList.GetBottom(); if (i && (!i->GetAbove() || i->GetType() == TYPE_TRANSFORM) && i->Frame() == mFrame) { mReferenceFrame = i->ReferenceFrame(); mToReferenceFrame = i->ToReferenceFrame(); } } nsDisplayWrapList::nsDisplayWrapList(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame, nsDisplayItem* aItem) : nsDisplayItem(aBuilder, aFrame) , mOverrideZIndex(0) { mList.AppendToTop(aItem); UpdateBounds(aBuilder); if (!aFrame || !aFrame->IsTransformed()) { return; } if (aFrame->Preserves3DChildren()) { mReferenceFrame = aBuilder->FindReferenceFrameFor(GetTransformRootFrame(aFrame)); mToReferenceFrame = aFrame->GetOffsetToCrossDoc(mReferenceFrame); return; } // See the previous nsDisplayWrapList constructor if (aItem->Frame() == aFrame) { mReferenceFrame = aItem->ReferenceFrame(); mToReferenceFrame = aItem->ToReferenceFrame(); } } nsDisplayWrapList::nsDisplayWrapList(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame, nsDisplayItem* aItem, const nsIFrame* aReferenceFrame, const nsPoint& aToReferenceFrame) : nsDisplayItem(aBuilder, aFrame, aReferenceFrame, aToReferenceFrame) , mOverrideZIndex(0) { mList.AppendToTop(aItem); mBounds = mList.GetBounds(aBuilder); } nsDisplayWrapList::~nsDisplayWrapList() { mList.DeleteAll(); } void nsDisplayWrapList::HitTest(nsDisplayListBuilder* aBuilder, const nsRect& aRect, HitTestState* aState, nsTArray *aOutFrames) { mList.HitTest(aBuilder, aRect, aState, aOutFrames); } nsRect nsDisplayWrapList::GetBounds(nsDisplayListBuilder* aBuilder, bool* aSnap) { *aSnap = false; return mBounds; } bool nsDisplayWrapList::ComputeVisibility(nsDisplayListBuilder* aBuilder, nsRegion* aVisibleRegion, const nsRect& aAllowVisibleRegionExpansion) { // Convert the passed in visible region to our appunits. nsRegion visibleRegion; // mVisibleRect has been clipped to GetClippedBounds visibleRegion.And(*aVisibleRegion, mVisibleRect); nsRegion originalVisibleRegion = visibleRegion; bool retval = mList.ComputeVisibilityForSublist(aBuilder, &visibleRegion, mVisibleRect, aAllowVisibleRegionExpansion); nsRegion removed; // removed = originalVisibleRegion - visibleRegion removed.Sub(originalVisibleRegion, visibleRegion); // aVisibleRegion = aVisibleRegion - removed (modulo any simplifications // SubtractFromVisibleRegion does) aBuilder->SubtractFromVisibleRegion(aVisibleRegion, removed); return retval; } nsRegion nsDisplayWrapList::GetOpaqueRegion(nsDisplayListBuilder* aBuilder, bool* aSnap) { *aSnap = false; nsRegion result; if (mList.IsOpaque()) { // Everything within GetBounds that's visible is opaque. result = GetBounds(aBuilder, aSnap); } return result; } bool nsDisplayWrapList::IsUniform(nsDisplayListBuilder* aBuilder, nscolor* aColor) { // We could try to do something but let's conservatively just return false. return false; } bool nsDisplayWrapList::IsVaryingRelativeToMovingFrame(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame) { NS_WARNING("nsDisplayWrapList::IsVaryingRelativeToMovingFrame called unexpectedly"); // We could try to do something but let's conservatively just return true. return true; } void nsDisplayWrapList::Paint(nsDisplayListBuilder* aBuilder, nsRenderingContext* aCtx) { NS_ERROR("nsDisplayWrapList should have been flattened away for painting"); } /** * Returns true if all descendant display items can be placed in the same * ThebesLayer --- GetLayerState returns LAYER_INACTIVE or LAYER_NONE, * and they all have the expected animated geometry root. */ static LayerState RequiredLayerStateForChildren(nsDisplayListBuilder* aBuilder, LayerManager* aManager, const ContainerLayerParameters& aParameters, const nsDisplayList& aList, nsIFrame* aExpectedAnimatedGeometryRootForChildren) { LayerState result = LAYER_INACTIVE; for (nsDisplayItem* i = aList.GetBottom(); i; i = i->GetAbove()) { if (result == LAYER_INACTIVE && nsLayoutUtils::GetAnimatedGeometryRootFor(i, aBuilder) != aExpectedAnimatedGeometryRootForChildren) { result = LAYER_ACTIVE; } LayerState state = i->GetLayerState(aBuilder, aManager, aParameters); if ((state == LAYER_ACTIVE || state == LAYER_ACTIVE_FORCE) && state > result) { result = state; } if (state == LAYER_ACTIVE_EMPTY && state > result) { result = LAYER_ACTIVE_FORCE; } if (state == LAYER_NONE) { nsDisplayList* list = i->GetSameCoordinateSystemChildren(); if (list) { LayerState childState = RequiredLayerStateForChildren(aBuilder, aManager, aParameters, *list, aExpectedAnimatedGeometryRootForChildren); if (childState > result) { result = childState; } } } } return result; } nsRect nsDisplayWrapList::GetComponentAlphaBounds(nsDisplayListBuilder* aBuilder) { nsRect bounds; for (nsDisplayItem* i = mList.GetBottom(); i; i = i->GetAbove()) { bounds.UnionRect(bounds, i->GetComponentAlphaBounds(aBuilder)); } return bounds; } static nsresult WrapDisplayList(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame, nsDisplayList* aList, nsDisplayWrapper* aWrapper) { if (!aList->GetTop()) return NS_OK; nsDisplayItem* item = aWrapper->WrapList(aBuilder, aFrame, aList); if (!item) return NS_ERROR_OUT_OF_MEMORY; // aList was emptied aList->AppendToTop(item); return NS_OK; } static nsresult WrapEachDisplayItem(nsDisplayListBuilder* aBuilder, nsDisplayList* aList, nsDisplayWrapper* aWrapper) { nsDisplayList newList; nsDisplayItem* item; while ((item = aList->RemoveBottom())) { item = aWrapper->WrapItem(aBuilder, item); if (!item) return NS_ERROR_OUT_OF_MEMORY; newList.AppendToTop(item); } // aList was emptied aList->AppendToTop(&newList); return NS_OK; } nsresult nsDisplayWrapper::WrapLists(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame, const nsDisplayListSet& aIn, const nsDisplayListSet& aOut) { nsresult rv = WrapListsInPlace(aBuilder, aFrame, aIn); NS_ENSURE_SUCCESS(rv, rv); if (&aOut == &aIn) return NS_OK; aOut.BorderBackground()->AppendToTop(aIn.BorderBackground()); aOut.BlockBorderBackgrounds()->AppendToTop(aIn.BlockBorderBackgrounds()); aOut.Floats()->AppendToTop(aIn.Floats()); aOut.Content()->AppendToTop(aIn.Content()); aOut.PositionedDescendants()->AppendToTop(aIn.PositionedDescendants()); aOut.Outlines()->AppendToTop(aIn.Outlines()); return NS_OK; } nsresult nsDisplayWrapper::WrapListsInPlace(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame, const nsDisplayListSet& aLists) { nsresult rv; if (WrapBorderBackground()) { // Our border-backgrounds are in-flow rv = WrapDisplayList(aBuilder, aFrame, aLists.BorderBackground(), this); NS_ENSURE_SUCCESS(rv, rv); } // Our block border-backgrounds are in-flow rv = WrapDisplayList(aBuilder, aFrame, aLists.BlockBorderBackgrounds(), this); NS_ENSURE_SUCCESS(rv, rv); // The floats are not in flow rv = WrapEachDisplayItem(aBuilder, aLists.Floats(), this); NS_ENSURE_SUCCESS(rv, rv); // Our child content is in flow rv = WrapDisplayList(aBuilder, aFrame, aLists.Content(), this); NS_ENSURE_SUCCESS(rv, rv); // The positioned descendants may not be in-flow rv = WrapEachDisplayItem(aBuilder, aLists.PositionedDescendants(), this); NS_ENSURE_SUCCESS(rv, rv); // The outlines may not be in-flow return WrapEachDisplayItem(aBuilder, aLists.Outlines(), this); } nsDisplayOpacity::nsDisplayOpacity(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame, nsDisplayList* aList) : nsDisplayWrapList(aBuilder, aFrame, aList) { MOZ_COUNT_CTOR(nsDisplayOpacity); } #ifdef NS_BUILD_REFCNT_LOGGING nsDisplayOpacity::~nsDisplayOpacity() { MOZ_COUNT_DTOR(nsDisplayOpacity); } #endif nsRegion nsDisplayOpacity::GetOpaqueRegion(nsDisplayListBuilder* aBuilder, bool* aSnap) { *aSnap = false; // We are never opaque, if our opacity was < 1 then we wouldn't have // been created. return nsRegion(); } // nsDisplayOpacity uses layers for rendering already_AddRefed nsDisplayOpacity::BuildLayer(nsDisplayListBuilder* aBuilder, LayerManager* aManager, const ContainerLayerParameters& aContainerParameters) { if (mFrame->StyleDisplay()->mOpacity == 0 && mFrame->GetContent() && !nsLayoutUtils::HasAnimations(mFrame->GetContent(), eCSSProperty_opacity)) { return nullptr; } nsRefPtr container = aManager->GetLayerBuilder()-> BuildContainerLayerFor(aBuilder, aManager, mFrame, this, mList, aContainerParameters, nullptr); if (!container) return nullptr; container->SetOpacity(mFrame->StyleDisplay()->mOpacity); nsDisplayListBuilder::AddAnimationsAndTransitionsToLayer(container, aBuilder, this, mFrame, eCSSProperty_opacity); return container.forget(); } /** * This doesn't take into account layer scaling --- the layer may be * rendered at a higher (or lower) resolution, affecting the retained layer * size --- but this should be good enough. */ static bool IsItemTooSmallForActiveLayer(nsDisplayItem* aItem) { nsIntRect visibleDevPixels = aItem->GetVisibleRect().ToOutsidePixels( aItem->Frame()->PresContext()->AppUnitsPerDevPixel()); static const int MIN_ACTIVE_LAYER_SIZE_DEV_PIXELS = 16; return visibleDevPixels.Size() < nsIntSize(MIN_ACTIVE_LAYER_SIZE_DEV_PIXELS, MIN_ACTIVE_LAYER_SIZE_DEV_PIXELS); } bool nsDisplayOpacity::NeedsActiveLayer() { if (ActiveLayerTracker::IsStyleAnimated(mFrame, eCSSProperty_opacity) && !IsItemTooSmallForActiveLayer(this)) return true; if (mFrame->GetContent()) { if (nsLayoutUtils::HasAnimationsForCompositor(mFrame->GetContent(), eCSSProperty_opacity)) { return true; } } return false; } bool nsDisplayOpacity::ShouldFlattenAway(nsDisplayListBuilder* aBuilder) { if (NeedsActiveLayer()) return false; nsDisplayItem* child = mList.GetBottom(); // Only try folding our opacity down if we have a single // child. We could potentially do this also if we had multiple // children as long as they don't overlap. if (!child || child->GetAbove()) { return false; } return child->ApplyOpacity(aBuilder, mFrame->StyleDisplay()->mOpacity, mClip); } nsDisplayItem::LayerState nsDisplayOpacity::GetLayerState(nsDisplayListBuilder* aBuilder, LayerManager* aManager, const ContainerLayerParameters& aParameters) { if (NeedsActiveLayer()) return LAYER_ACTIVE; return RequiredLayerStateForChildren(aBuilder, aManager, aParameters, mList, nsLayoutUtils::GetAnimatedGeometryRootFor(this, aBuilder)); } bool nsDisplayOpacity::ComputeVisibility(nsDisplayListBuilder* aBuilder, nsRegion* aVisibleRegion, const nsRect& aAllowVisibleRegionExpansion) { // Our children are translucent so we should not allow them to subtract // area from aVisibleRegion. We do need to find out what is visible under // our children in the temporary compositing buffer, because if our children // paint our entire bounds opaquely then we don't need an alpha channel in // the temporary compositing buffer. nsRect bounds = GetClippedBounds(aBuilder); nsRegion visibleUnderChildren; visibleUnderChildren.And(*aVisibleRegion, bounds); nsRect allowExpansion = bounds.Intersect(aAllowVisibleRegionExpansion); return nsDisplayWrapList::ComputeVisibility(aBuilder, &visibleUnderChildren, allowExpansion); } bool nsDisplayOpacity::TryMerge(nsDisplayListBuilder* aBuilder, nsDisplayItem* aItem) { if (aItem->GetType() != TYPE_OPACITY) return false; // items for the same content element should be merged into a single // compositing group // aItem->GetUnderlyingFrame() returns non-null because it's nsDisplayOpacity if (aItem->Frame()->GetContent() != mFrame->GetContent()) return false; if (aItem->GetClip() != GetClip()) return false; MergeFromTrackingMergedFrames(static_cast(aItem)); return true; } #ifdef MOZ_DUMP_PAINTING void nsDisplayOpacity::WriteDebugInfo(nsACString& aTo) { aTo += nsPrintfCString(" (opacity %f)", mFrame->StyleDisplay()->mOpacity); } #endif nsDisplayMixBlendMode::nsDisplayMixBlendMode(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame, nsDisplayList* aList, uint32_t aFlags) : nsDisplayWrapList(aBuilder, aFrame, aList) { MOZ_COUNT_CTOR(nsDisplayMixBlendMode); } #ifdef NS_BUILD_REFCNT_LOGGING nsDisplayMixBlendMode::~nsDisplayMixBlendMode() { MOZ_COUNT_DTOR(nsDisplayMixBlendMode); } #endif nsRegion nsDisplayMixBlendMode::GetOpaqueRegion(nsDisplayListBuilder* aBuilder, bool* aSnap) { *aSnap = false; // We are never considered opaque return nsRegion(); } LayerState nsDisplayMixBlendMode::GetLayerState(nsDisplayListBuilder* aBuilder, LayerManager* aManager, const ContainerLayerParameters& aParameters) { gfxContext::GraphicsOperator op = nsCSSRendering::GetGFXBlendMode(mFrame->StyleDisplay()->mMixBlendMode); if (aManager->SupportsMixBlendMode(gfx::CompositionOpForOp(op))) { return LAYER_ACTIVE; } return LAYER_INACTIVE; } // nsDisplayMixBlendMode uses layers for rendering already_AddRefed nsDisplayMixBlendMode::BuildLayer(nsDisplayListBuilder* aBuilder, LayerManager* aManager, const ContainerLayerParameters& aContainerParameters) { ContainerLayerParameters newContainerParameters = aContainerParameters; newContainerParameters.mDisableSubpixelAntialiasingInDescendants = true; nsRefPtr container = aManager->GetLayerBuilder()-> BuildContainerLayerFor(aBuilder, aManager, mFrame, this, mList, newContainerParameters, nullptr); if (!container) { return nullptr; } container->DeprecatedSetMixBlendMode(nsCSSRendering::GetGFXBlendMode(mFrame->StyleDisplay()->mMixBlendMode)); return container.forget(); } bool nsDisplayMixBlendMode::ComputeVisibility(nsDisplayListBuilder* aBuilder, nsRegion* aVisibleRegion, const nsRect& aAllowVisibleRegionExpansion) { // Our children are need their backdrop so we should not allow them to subtract // area from aVisibleRegion. We do need to find out what is visible under // our children in the temporary compositing buffer, because if our children // paint our entire bounds opaquely then we don't need an alpha channel in // the temporary compositing buffer. nsRect bounds = GetClippedBounds(aBuilder); nsRegion visibleUnderChildren; visibleUnderChildren.And(*aVisibleRegion, bounds); nsRect allowExpansion = bounds.Intersect(aAllowVisibleRegionExpansion); return nsDisplayWrapList::ComputeVisibility(aBuilder, &visibleUnderChildren, allowExpansion); } bool nsDisplayMixBlendMode::TryMerge(nsDisplayListBuilder* aBuilder, nsDisplayItem* aItem) { if (aItem->GetType() != TYPE_MIX_BLEND_MODE) return false; // items for the same content element should be merged into a single // compositing group // aItem->GetUnderlyingFrame() returns non-null because it's nsDisplayOpacity if (aItem->Frame()->GetContent() != mFrame->GetContent()) return false; if (aItem->GetClip() != GetClip()) return false; MergeFromTrackingMergedFrames(static_cast(aItem)); return true; } nsDisplayBlendContainer::nsDisplayBlendContainer(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame, nsDisplayList* aList, BlendModeSet& aContainedBlendModes) : nsDisplayWrapList(aBuilder, aFrame, aList) , mContainedBlendModes(aContainedBlendModes) , mCanBeActive(true) { MOZ_COUNT_CTOR(nsDisplayBlendContainer); } nsDisplayBlendContainer::nsDisplayBlendContainer(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame, nsDisplayList* aList) : nsDisplayWrapList(aBuilder, aFrame, aList) , mCanBeActive(false) { MOZ_COUNT_CTOR(nsDisplayBlendContainer); } #ifdef NS_BUILD_REFCNT_LOGGING nsDisplayBlendContainer::~nsDisplayBlendContainer() { MOZ_COUNT_DTOR(nsDisplayBlendContainer); } #endif // nsDisplayBlendContainer uses layers for rendering already_AddRefed nsDisplayBlendContainer::BuildLayer(nsDisplayListBuilder* aBuilder, LayerManager* aManager, const ContainerLayerParameters& aContainerParameters) { // turn off anti-aliasing in the parent stacking context because it changes // how the group is initialized. ContainerLayerParameters newContainerParameters = aContainerParameters; newContainerParameters.mDisableSubpixelAntialiasingInDescendants = true; nsRefPtr container = aManager->GetLayerBuilder()-> BuildContainerLayerFor(aBuilder, aManager, mFrame, this, mList, newContainerParameters, nullptr); if (!container) { return nullptr; } container->SetForceIsolatedGroup(true); return container.forget(); } bool nsDisplayBlendContainer::TryMerge(nsDisplayListBuilder* aBuilder, nsDisplayItem* aItem) { if (aItem->GetType() != TYPE_BLEND_CONTAINER) return false; // items for the same content element should be merged into a single // compositing group // aItem->GetUnderlyingFrame() returns non-null because it's nsDisplayOpacity if (aItem->Frame()->GetContent() != mFrame->GetContent()) return false; if (aItem->GetClip() != GetClip()) return false; MergeFromTrackingMergedFrames(static_cast(aItem)); return true; } nsDisplayOwnLayer::nsDisplayOwnLayer(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame, nsDisplayList* aList, uint32_t aFlags, ViewID aScrollTarget) : nsDisplayWrapList(aBuilder, aFrame, aList) , mFlags(aFlags) , mScrollTarget(aScrollTarget) { MOZ_COUNT_CTOR(nsDisplayOwnLayer); } #ifdef NS_BUILD_REFCNT_LOGGING nsDisplayOwnLayer::~nsDisplayOwnLayer() { MOZ_COUNT_DTOR(nsDisplayOwnLayer); } #endif // nsDisplayOpacity uses layers for rendering already_AddRefed nsDisplayOwnLayer::BuildLayer(nsDisplayListBuilder* aBuilder, LayerManager* aManager, const ContainerLayerParameters& aContainerParameters) { nsRefPtr layer = aManager->GetLayerBuilder()-> BuildContainerLayerFor(aBuilder, aManager, mFrame, this, mList, aContainerParameters, nullptr); if (mFlags & VERTICAL_SCROLLBAR) { layer->SetScrollbarData(mScrollTarget, Layer::ScrollDirection::VERTICAL); } if (mFlags & HORIZONTAL_SCROLLBAR) { layer->SetScrollbarData(mScrollTarget, Layer::ScrollDirection::HORIZONTAL); } if (mFlags & GENERATE_SUBDOC_INVALIDATIONS) { mFrame->PresContext()->SetNotifySubDocInvalidationData(layer); } return layer.forget(); } nsDisplaySubDocument::nsDisplaySubDocument(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame, nsDisplayList* aList, uint32_t aFlags) : nsDisplayOwnLayer(aBuilder, aFrame, aList, aFlags) , mScrollParentId(aBuilder->GetCurrentScrollParentId()) { MOZ_COUNT_CTOR(nsDisplaySubDocument); } #ifdef NS_BUILD_REFCNT_LOGGING nsDisplaySubDocument::~nsDisplaySubDocument() { MOZ_COUNT_DTOR(nsDisplaySubDocument); } #endif already_AddRefed nsDisplaySubDocument::BuildLayer(nsDisplayListBuilder* aBuilder, LayerManager* aManager, const ContainerLayerParameters& aContainerParameters) { nsRefPtr layer = nsDisplayOwnLayer::BuildLayer( aBuilder, aManager, aContainerParameters); if (!(mFlags & GENERATE_SCROLLABLE_LAYER)) { return layer.forget(); } NS_ASSERTION(layer->AsContainerLayer(), "nsDisplayOwnLayer should have made a ContainerLayer"); if (ContainerLayer* container = layer->AsContainerLayer()) { nsPresContext* presContext = mFrame->PresContext(); nsIFrame* rootScrollFrame = presContext->PresShell()->GetRootScrollFrame(); bool isRootContentDocument = presContext->IsRootContentDocument(); bool usingDisplayport = false; bool usingCriticalDisplayport = false; nsRect displayport, criticalDisplayport; ViewID scrollId = FrameMetrics::NULL_SCROLL_ID; if (rootScrollFrame) { nsIContent* content = rootScrollFrame->GetContent(); if (content) { usingDisplayport = nsLayoutUtils::GetDisplayPort(content, &displayport); usingCriticalDisplayport = nsLayoutUtils::GetCriticalDisplayPort(content, &criticalDisplayport); if (isRootContentDocument) { scrollId = nsLayoutUtils::FindOrCreateIDFor(content); } else { nsLayoutUtils::FindIDFor(content, &scrollId); } } } nsRect viewport = mFrame->GetRect() - mFrame->GetPosition() + mFrame->GetOffsetToCrossDoc(ReferenceFrame()); container->SetScrollHandoffParentId(mScrollParentId); RecordFrameMetrics(mFrame, rootScrollFrame, ReferenceFrame(), container, mList.GetVisibleRect(), viewport, (usingDisplayport ? &displayport : nullptr), (usingCriticalDisplayport ? &criticalDisplayport : nullptr), scrollId, isRootContentDocument, aContainerParameters); } return layer.forget(); } nsRect nsDisplaySubDocument::GetBounds(nsDisplayListBuilder* aBuilder, bool* aSnap) { bool usingDisplayPort = nsLayoutUtils::ViewportHasDisplayPort(mFrame->PresContext()); if ((mFlags & GENERATE_SCROLLABLE_LAYER) && usingDisplayPort) { *aSnap = false; return mFrame->GetRect() + aBuilder->ToReferenceFrame(mFrame); } return nsDisplayOwnLayer::GetBounds(aBuilder, aSnap); } bool nsDisplaySubDocument::ComputeVisibility(nsDisplayListBuilder* aBuilder, nsRegion* aVisibleRegion, const nsRect& aAllowVisibleRegionExpansion) { nsRect displayport; bool usingDisplayPort = nsLayoutUtils::ViewportHasDisplayPort(mFrame->PresContext(), &displayport); if (!(mFlags & GENERATE_SCROLLABLE_LAYER) || !usingDisplayPort) { return nsDisplayWrapList::ComputeVisibility(aBuilder, aVisibleRegion, aAllowVisibleRegionExpansion); } nsRegion childVisibleRegion; // The visible region for the children may be much bigger than the hole we // are viewing the children from, so that the compositor process has enough // content to asynchronously pan while content is being refreshed. childVisibleRegion = displayport + mFrame->GetOffsetToCrossDoc(ReferenceFrame()); nsRect boundedRect = childVisibleRegion.GetBounds().Intersect(mList.GetBounds(aBuilder)); nsRect allowExpansion = boundedRect.Intersect(aAllowVisibleRegionExpansion); bool visible = mList.ComputeVisibilityForSublist( aBuilder, &childVisibleRegion, boundedRect, allowExpansion, usingDisplayPort ? mFrame : nullptr); // We don't allow this computation to influence aVisibleRegion, on the // assumption that the layer can be asynchronously scrolled so we'll // definitely need all the content under it. return visible; } bool nsDisplaySubDocument::ShouldBuildLayerEvenIfInvisible(nsDisplayListBuilder* aBuilder) { bool usingDisplayPort = nsLayoutUtils::ViewportHasDisplayPort(mFrame->PresContext()); if ((mFlags & GENERATE_SCROLLABLE_LAYER) && usingDisplayPort) { return true; } return nsDisplayOwnLayer::ShouldBuildLayerEvenIfInvisible(aBuilder); } nsRegion nsDisplaySubDocument::GetOpaqueRegion(nsDisplayListBuilder* aBuilder, bool* aSnap) { bool usingDisplayPort = nsLayoutUtils::ViewportHasDisplayPort(mFrame->PresContext()); if ((mFlags & GENERATE_SCROLLABLE_LAYER) && usingDisplayPort) { *aSnap = false; return nsRegion(); } return nsDisplayOwnLayer::GetOpaqueRegion(aBuilder, aSnap); } nsDisplayResolution::nsDisplayResolution(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame, nsDisplayList* aList, uint32_t aFlags) : nsDisplaySubDocument(aBuilder, aFrame, aList, aFlags) { MOZ_COUNT_CTOR(nsDisplayResolution); } #ifdef NS_BUILD_REFCNT_LOGGING nsDisplayResolution::~nsDisplayResolution() { MOZ_COUNT_DTOR(nsDisplayResolution); } #endif already_AddRefed nsDisplayResolution::BuildLayer(nsDisplayListBuilder* aBuilder, LayerManager* aManager, const ContainerLayerParameters& aContainerParameters) { nsIPresShell* presShell = mFrame->PresContext()->PresShell(); ContainerLayerParameters containerParameters( presShell->GetXResolution(), presShell->GetYResolution(), nsIntPoint(), aContainerParameters); nsRefPtr layer = nsDisplaySubDocument::BuildLayer( aBuilder, aManager, containerParameters); layer->SetPostScale(1.0f / presShell->GetXResolution(), 1.0f / presShell->GetYResolution()); return layer.forget(); } nsDisplayStickyPosition::nsDisplayStickyPosition(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame, nsDisplayList* aList) : nsDisplayOwnLayer(aBuilder, aFrame, aList) { MOZ_COUNT_CTOR(nsDisplayStickyPosition); } #ifdef NS_BUILD_REFCNT_LOGGING nsDisplayStickyPosition::~nsDisplayStickyPosition() { MOZ_COUNT_DTOR(nsDisplayStickyPosition); } #endif already_AddRefed nsDisplayStickyPosition::BuildLayer(nsDisplayListBuilder* aBuilder, LayerManager* aManager, const ContainerLayerParameters& aContainerParameters) { nsRefPtr layer = nsDisplayOwnLayer::BuildLayer(aBuilder, aManager, aContainerParameters); StickyScrollContainer* stickyScrollContainer = StickyScrollContainer:: GetStickyScrollContainerForFrame(mFrame); if (!stickyScrollContainer) { return layer.forget(); } nsIFrame* scrollFrame = do_QueryFrame(stickyScrollContainer->ScrollFrame()); nsPresContext* presContext = scrollFrame->PresContext(); // Sticky position frames whose scroll frame is the root scroll frame are // reflowed into the scroll-port size if one has been set. nsSize scrollFrameSize = scrollFrame->GetSize(); if (scrollFrame == presContext->PresShell()->GetRootScrollFrame() && presContext->PresShell()->IsScrollPositionClampingScrollPortSizeSet()) { scrollFrameSize = presContext->PresShell()-> GetScrollPositionClampingScrollPortSize(); } nsLayoutUtils::SetFixedPositionLayerData(layer, scrollFrame, nsRect(scrollFrame->GetOffsetToCrossDoc(ReferenceFrame()), scrollFrameSize), mFrame, presContext, aContainerParameters); ViewID scrollId = nsLayoutUtils::FindOrCreateIDFor( stickyScrollContainer->ScrollFrame()->GetScrolledFrame()->GetContent()); float factor = presContext->AppUnitsPerDevPixel(); nsRect outer; nsRect inner; stickyScrollContainer->GetScrollRanges(mFrame, &outer, &inner); LayerRect stickyOuter(NSAppUnitsToFloatPixels(outer.x, factor) * aContainerParameters.mXScale, NSAppUnitsToFloatPixels(outer.y, factor) * aContainerParameters.mYScale, NSAppUnitsToFloatPixels(outer.width, factor) * aContainerParameters.mXScale, NSAppUnitsToFloatPixels(outer.height, factor) * aContainerParameters.mYScale); LayerRect stickyInner(NSAppUnitsToFloatPixels(inner.x, factor) * aContainerParameters.mXScale, NSAppUnitsToFloatPixels(inner.y, factor) * aContainerParameters.mYScale, NSAppUnitsToFloatPixels(inner.width, factor) * aContainerParameters.mXScale, NSAppUnitsToFloatPixels(inner.height, factor) * aContainerParameters.mYScale); layer->SetStickyPositionData(scrollId, stickyOuter, stickyInner); return layer.forget(); } bool nsDisplayStickyPosition::TryMerge(nsDisplayListBuilder* aBuilder, nsDisplayItem* aItem) { if (aItem->GetType() != TYPE_STICKY_POSITION) return false; // Items with the same fixed position frame can be merged. nsDisplayStickyPosition* other = static_cast(aItem); if (other->mFrame != mFrame) return false; if (aItem->GetClip() != GetClip()) return false; MergeFromTrackingMergedFrames(other); return true; } nsDisplayScrollLayer::nsDisplayScrollLayer(nsDisplayListBuilder* aBuilder, nsDisplayList* aList, nsIFrame* aForFrame, nsIFrame* aScrolledFrame, nsIFrame* aScrollFrame) : nsDisplayWrapList(aBuilder, aForFrame, aList) , mScrollFrame(aScrollFrame) , mScrolledFrame(aScrolledFrame) , mScrollParentId(aBuilder->GetCurrentScrollParentId()) { #ifdef NS_BUILD_REFCNT_LOGGING MOZ_COUNT_CTOR(nsDisplayScrollLayer); #endif NS_ASSERTION(mScrolledFrame && mScrolledFrame->GetContent(), "Need a child frame with content"); } nsDisplayScrollLayer::nsDisplayScrollLayer(nsDisplayListBuilder* aBuilder, nsDisplayItem* aItem, nsIFrame* aForFrame, nsIFrame* aScrolledFrame, nsIFrame* aScrollFrame) : nsDisplayWrapList(aBuilder, aForFrame, aItem) , mScrollFrame(aScrollFrame) , mScrolledFrame(aScrolledFrame) , mScrollParentId(aBuilder->GetCurrentScrollParentId()) { #ifdef NS_BUILD_REFCNT_LOGGING MOZ_COUNT_CTOR(nsDisplayScrollLayer); #endif NS_ASSERTION(mScrolledFrame && mScrolledFrame->GetContent(), "Need a child frame with content"); } nsDisplayScrollLayer::nsDisplayScrollLayer(nsDisplayListBuilder* aBuilder, nsIFrame* aForFrame, nsIFrame* aScrolledFrame, nsIFrame* aScrollFrame) : nsDisplayWrapList(aBuilder, aForFrame) , mScrollFrame(aScrollFrame) , mScrolledFrame(aScrolledFrame) , mScrollParentId(aBuilder->GetCurrentScrollParentId()) { #ifdef NS_BUILD_REFCNT_LOGGING MOZ_COUNT_CTOR(nsDisplayScrollLayer); #endif NS_ASSERTION(mScrolledFrame && mScrolledFrame->GetContent(), "Need a child frame with content"); } #ifdef NS_BUILD_REFCNT_LOGGING nsDisplayScrollLayer::~nsDisplayScrollLayer() { MOZ_COUNT_DTOR(nsDisplayScrollLayer); } #endif nsRect nsDisplayScrollLayer::GetBounds(nsDisplayListBuilder* aBuilder, bool* aSnap) { nsIScrollableFrame* sf = do_QueryFrame(mScrollFrame); if (sf) { *aSnap = false; return sf->GetScrollPortRect() + aBuilder->ToReferenceFrame(mScrollFrame); } return nsDisplayWrapList::GetBounds(aBuilder, aSnap); } already_AddRefed nsDisplayScrollLayer::BuildLayer(nsDisplayListBuilder* aBuilder, LayerManager* aManager, const ContainerLayerParameters& aContainerParameters) { nsRefPtr layer = aManager->GetLayerBuilder()-> BuildContainerLayerFor(aBuilder, aManager, mFrame, this, mList, aContainerParameters, nullptr); // Get the already set unique ID for scrolling this content remotely. // Or, if not set, generate a new ID. nsIContent* content = mScrolledFrame->GetContent(); ViewID scrollId = nsLayoutUtils::FindOrCreateIDFor(content); nsRect viewport = mScrollFrame->GetRect() - mScrollFrame->GetPosition() + mScrollFrame->GetOffsetToCrossDoc(ReferenceFrame()); bool usingDisplayport = false; bool usingCriticalDisplayport = false; nsRect displayport, criticalDisplayport; if (content) { usingDisplayport = nsLayoutUtils::GetDisplayPort(content, &displayport); usingCriticalDisplayport = nsLayoutUtils::GetCriticalDisplayPort(content, &criticalDisplayport); } layer->SetScrollHandoffParentId(mScrollParentId); RecordFrameMetrics(mScrolledFrame, mScrollFrame, ReferenceFrame(), layer, mList.GetVisibleRect(), viewport, (usingDisplayport ? &displayport : nullptr), (usingCriticalDisplayport ? &criticalDisplayport : nullptr), scrollId, false, aContainerParameters); return layer.forget(); } bool nsDisplayScrollLayer::ShouldBuildLayerEvenIfInvisible(nsDisplayListBuilder* aBuilder) { if (nsLayoutUtils::GetDisplayPort(mScrolledFrame->GetContent(), nullptr)) { return true; } return nsDisplayWrapList::ShouldBuildLayerEvenIfInvisible(aBuilder); } bool nsDisplayScrollLayer::ComputeVisibility(nsDisplayListBuilder* aBuilder, nsRegion* aVisibleRegion, const nsRect& aAllowVisibleRegionExpansion) { nsRect displayport; bool usingDisplayPort = nsLayoutUtils::GetDisplayPort(mScrolledFrame->GetContent(), &displayport); nsRegion childVisibleRegion; if (usingDisplayPort) { // The visible region for the children may be much bigger than the hole we // are viewing the children from, so that the compositor process has enough // content to asynchronously pan while content is being refreshed. childVisibleRegion = displayport + mScrollFrame->GetOffsetToCrossDoc(ReferenceFrame()); } else { bool snap; childVisibleRegion = GetBounds(aBuilder, &snap); } nsRect boundedRect = childVisibleRegion.GetBounds().Intersect(mList.GetBounds(aBuilder)); nsRect allowExpansion = boundedRect.Intersect(aAllowVisibleRegionExpansion); bool visible = mList.ComputeVisibilityForSublist( aBuilder, &childVisibleRegion, boundedRect, allowExpansion, usingDisplayPort ? mScrollFrame : nullptr); // We don't allow this computation to influence aVisibleRegion, on the // assumption that the layer can be asynchronously scrolled so we'll // definitely need all the content under it. return visible; } LayerState nsDisplayScrollLayer::GetLayerState(nsDisplayListBuilder* aBuilder, LayerManager* aManager, const ContainerLayerParameters& aParameters) { // Force this as a layer so we can scroll asynchronously. // This causes incorrect rendering for rounded clips! return LAYER_ACTIVE_FORCE; } // Check if we are going to clip an abs pos item that we don't contain. // Root scroll frames clip all their descendants, so we don't need to worry // about them. bool WouldCauseIncorrectClippingOnAbsPosItem(nsDisplayListBuilder* aBuilder, nsDisplayScrollLayer* aItem) { nsIFrame* scrollFrame = aItem->GetScrollFrame(); nsIPresShell* presShell = scrollFrame->PresContext()->PresShell(); if (scrollFrame == presShell->GetRootScrollFrame()) { return false; } nsIFrame* scrolledFrame = aItem->GetScrolledFrame(); nsIFrame* frame = aItem->Frame(); if (frame == scrolledFrame || !frame->IsAbsolutelyPositioned() || nsLayoutUtils::IsAncestorFrameCrossDoc(scrollFrame, frame, presShell->GetRootFrame())) { return false; } if (!aItem->GetClip().IsRectAffectedByClip(aItem->GetChildren()->GetBounds(aBuilder))) { return false; } return true; } bool nsDisplayScrollLayer::TryMerge(nsDisplayListBuilder* aBuilder, nsDisplayItem* aItem) { if (aItem->GetType() != TYPE_SCROLL_LAYER) { return false; } nsDisplayScrollLayer* other = static_cast(aItem); if (other->mScrolledFrame != this->mScrolledFrame) { return false; } if (aItem->GetClip() != GetClip()) { return false; } if (WouldCauseIncorrectClippingOnAbsPosItem(aBuilder, this) || WouldCauseIncorrectClippingOnAbsPosItem(aBuilder, other)) { return false; } NS_ASSERTION(other->mReferenceFrame == mReferenceFrame, "Must have the same reference frame!"); FrameProperties props = mScrolledFrame->Properties(); props.Set(nsIFrame::ScrollLayerCount(), reinterpret_cast(GetScrollLayerCount() - 1)); // Swap frames with the other item before doing MergeFrom. // XXX - This ensures that the frame associated with a scroll layer after // merging is the first, rather than the last. This tends to change less, // ensuring we're more likely to retain the associated gfx layer. // See Bug 729534 and Bug 731641. nsIFrame* tmp = mFrame; mFrame = other->mFrame; other->mFrame = tmp; MergeFromTrackingMergedFrames(other); return true; } void PropagateClip(nsDisplayListBuilder* aBuilder, const DisplayItemClip& aClip, nsDisplayList* aList) { for (nsDisplayItem* i = aList->GetBottom(); i != nullptr; i = i->GetAbove()) { DisplayItemClip clip(i->GetClip()); clip.IntersectWith(aClip); i->SetClip(aBuilder, clip); nsDisplayList* list = i->GetSameCoordinateSystemChildren(); if (list) { PropagateClip(aBuilder, aClip, list); } } } bool nsDisplayScrollLayer::ShouldFlattenAway(nsDisplayListBuilder* aBuilder) { bool badAbsPosClip = WouldCauseIncorrectClippingOnAbsPosItem(aBuilder, this); if (GetScrollLayerCount() > 1 || badAbsPosClip) { // Propagate our clip to our children. The clip for the scroll frame is // on this item, but not our child items so that they can draw non-visible // parts of the display port. But if we are flattening we failed and can't // draw the extra content, so it needs to be clipped. // But don't induce our clip on abs pos frames that we shouldn't be clipping. if (!badAbsPosClip) { PropagateClip(aBuilder, GetClip(), &mList); } return true; } if (mFrame != mScrolledFrame) { mMergedFrames.AppendElement(mFrame); mFrame = mScrolledFrame; } return false; } intptr_t nsDisplayScrollLayer::GetScrollLayerCount() { FrameProperties props = mScrolledFrame->Properties(); #ifdef DEBUG bool hasCount = false; intptr_t result = reinterpret_cast( props.Get(nsIFrame::ScrollLayerCount(), &hasCount)); // If this aborts, then the property was either not added before scroll // layers were created or the property was deleted to early. If the latter, // make sure that nsDisplayScrollInfoLayer is on the bottom of the list so // that it is processed last. NS_ABORT_IF_FALSE(hasCount, "nsDisplayScrollLayer should always be defined"); return result; #else return reinterpret_cast(props.Get(nsIFrame::ScrollLayerCount())); #endif } #ifdef MOZ_DUMP_PAINTING void nsDisplayScrollLayer::WriteDebugInfo(nsACString& aTo) { aTo += nsPrintfCString(" (scrollframe %p scrolledframe %p)", mScrollFrame, mScrolledFrame); } #endif nsDisplayScrollInfoLayer::nsDisplayScrollInfoLayer( nsDisplayListBuilder* aBuilder, nsIFrame* aScrolledFrame, nsIFrame* aScrollFrame) : nsDisplayScrollLayer(aBuilder, aScrollFrame, aScrolledFrame, aScrollFrame) { #ifdef NS_BUILD_REFCNT_LOGGING MOZ_COUNT_CTOR(nsDisplayScrollInfoLayer); #endif } nsDisplayScrollInfoLayer::~nsDisplayScrollInfoLayer() { FrameProperties props = mScrolledFrame->Properties(); props.Remove(nsIFrame::ScrollLayerCount()); MOZ_COUNT_DTOR(nsDisplayScrollInfoLayer); } nsRect nsDisplayScrollInfoLayer::GetBounds(nsDisplayListBuilder* aBuilder, bool* aSnap) { return nsDisplayWrapList::GetBounds(aBuilder, aSnap); } LayerState nsDisplayScrollInfoLayer::GetLayerState(nsDisplayListBuilder* aBuilder, LayerManager* aManager, const ContainerLayerParameters& aParameters) { return LAYER_ACTIVE_EMPTY; } bool nsDisplayScrollInfoLayer::TryMerge(nsDisplayListBuilder* aBuilder, nsDisplayItem* aItem) { return false; } bool nsDisplayScrollInfoLayer::ShouldFlattenAway(nsDisplayListBuilder* aBuilder) { // Layer metadata for a particular scroll frame needs to be unique. Only // one nsDisplayScrollLayer (with rendered content) or one // nsDisplayScrollInfoLayer (with only the metadata) should survive the // visibility computation. return GetScrollLayerCount() == 1; } nsDisplayZoom::nsDisplayZoom(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame, nsDisplayList* aList, int32_t aAPD, int32_t aParentAPD, uint32_t aFlags) : nsDisplaySubDocument(aBuilder, aFrame, aList, aFlags) , mAPD(aAPD), mParentAPD(aParentAPD) { MOZ_COUNT_CTOR(nsDisplayZoom); } #ifdef NS_BUILD_REFCNT_LOGGING nsDisplayZoom::~nsDisplayZoom() { MOZ_COUNT_DTOR(nsDisplayZoom); } #endif nsRect nsDisplayZoom::GetBounds(nsDisplayListBuilder* aBuilder, bool* aSnap) { nsRect bounds = nsDisplaySubDocument::GetBounds(aBuilder, aSnap); *aSnap = false; return bounds.ConvertAppUnitsRoundOut(mAPD, mParentAPD); } void nsDisplayZoom::HitTest(nsDisplayListBuilder *aBuilder, const nsRect& aRect, HitTestState *aState, nsTArray *aOutFrames) { nsRect rect; // A 1x1 rect indicates we are just hit testing a point, so pass down a 1x1 // rect as well instead of possibly rounding the width or height to zero. if (aRect.width == 1 && aRect.height == 1) { rect.MoveTo(aRect.TopLeft().ConvertAppUnits(mParentAPD, mAPD)); rect.width = rect.height = 1; } else { rect = aRect.ConvertAppUnitsRoundOut(mParentAPD, mAPD); } mList.HitTest(aBuilder, rect, aState, aOutFrames); } void nsDisplayZoom::Paint(nsDisplayListBuilder* aBuilder, nsRenderingContext* aCtx) { mList.PaintForFrame(aBuilder, aCtx, mFrame, nsDisplayList::PAINT_DEFAULT); } bool nsDisplayZoom::ComputeVisibility(nsDisplayListBuilder *aBuilder, nsRegion *aVisibleRegion, const nsRect& aAllowVisibleRegionExpansion) { // Convert the passed in visible region to our appunits. nsRegion visibleRegion; // mVisibleRect has been clipped to GetClippedBounds visibleRegion.And(*aVisibleRegion, mVisibleRect); visibleRegion = visibleRegion.ConvertAppUnitsRoundOut(mParentAPD, mAPD); nsRegion originalVisibleRegion = visibleRegion; nsRect transformedVisibleRect = mVisibleRect.ConvertAppUnitsRoundOut(mParentAPD, mAPD); nsRect allowExpansion = aAllowVisibleRegionExpansion.ConvertAppUnitsRoundIn(mParentAPD, mAPD); bool retval; // If we are to generate a scrollable layer we call // nsDisplaySubDocument::ComputeVisibility to make the necessary adjustments // for ComputeVisibility, it does all it's calculations in the child APD. bool usingDisplayPort = nsLayoutUtils::ViewportHasDisplayPort(mFrame->PresContext()); if (!(mFlags & GENERATE_SCROLLABLE_LAYER) || !usingDisplayPort) { retval = mList.ComputeVisibilityForSublist(aBuilder, &visibleRegion, transformedVisibleRect, allowExpansion); } else { retval = nsDisplaySubDocument::ComputeVisibility(aBuilder, &visibleRegion, allowExpansion); } nsRegion removed; // removed = originalVisibleRegion - visibleRegion removed.Sub(originalVisibleRegion, visibleRegion); // Convert removed region to parent appunits. removed = removed.ConvertAppUnitsRoundIn(mAPD, mParentAPD); // aVisibleRegion = aVisibleRegion - removed (modulo any simplifications // SubtractFromVisibleRegion does) aBuilder->SubtractFromVisibleRegion(aVisibleRegion, removed); return retval; } /////////////////////////////////////////////////// // nsDisplayTransform Implementation // // Write #define UNIFIED_CONTINUATIONS here to have the transform property try // to transform content with continuations as one unified block instead of // several smaller ones. This is currently disabled because it doesn't work // correctly, since when the frames are initially being reflowed, their // continuations all compute their bounding rects independently of each other // and consequently get the wrong value. Write #define DEBUG_HIT here to have // the nsDisplayTransform class dump out a bunch of information about hit // detection. #undef UNIFIED_CONTINUATIONS #undef DEBUG_HIT /* Returns the bounds of a frame as defined for transforms. If * UNIFIED_CONTINUATIONS is not defined, this is simply the frame's bounding * rectangle, translated to the origin. Otherwise, returns the smallest * rectangle containing a frame and all of its continuations. For example, if * there is a element with several continuations split over several * lines, this function will return the rectangle containing all of those * continuations. This rectangle is relative to the origin of the frame's local * coordinate space. */ #ifndef UNIFIED_CONTINUATIONS nsRect nsDisplayTransform::GetFrameBoundsForTransform(const nsIFrame* aFrame) { NS_PRECONDITION(aFrame, "Can't get the bounds of a nonexistent frame!"); if (aFrame->GetStateBits() & NS_FRAME_SVG_LAYOUT) { // TODO: SVG needs to define what percentage translations resolve against. return nsRect(); } return nsRect(nsPoint(0, 0), aFrame->GetSize()); } #else nsRect nsDisplayTransform::GetFrameBoundsForTransform(const nsIFrame* aFrame) { NS_PRECONDITION(aFrame, "Can't get the bounds of a nonexistent frame!"); nsRect result; if (aFrame->GetStateBits() & NS_FRAME_SVG_LAYOUT) { // TODO: SVG needs to define what percentage translations resolve against. return result; } /* Iterate through the continuation list, unioning together all the * bounding rects. */ for (const nsIFrame *currFrame = aFrame->FirstContinuation(); currFrame != nullptr; currFrame = currFrame->GetNextContinuation()) { /* Get the frame rect in local coordinates, then translate back to the * original coordinates. */ result.UnionRect(result, nsRect(currFrame->GetOffsetTo(aFrame), currFrame->GetSize())); } return result; } #endif nsDisplayTransform::nsDisplayTransform(nsDisplayListBuilder* aBuilder, nsIFrame *aFrame, nsDisplayList *aList, ComputeTransformFunction aTransformGetter, uint32_t aIndex) : nsDisplayItem(aBuilder, aFrame) , mStoredList(aBuilder, aFrame, aList) , mTransformGetter(aTransformGetter) , mIndex(aIndex) { MOZ_COUNT_CTOR(nsDisplayTransform); NS_ABORT_IF_FALSE(aFrame, "Must have a frame!"); NS_ABORT_IF_FALSE(!aFrame->IsTransformed(), "Can't specify a transform getter for a transformed frame!"); mStoredList.SetClip(aBuilder, DisplayItemClip::NoClip()); } nsDisplayTransform::nsDisplayTransform(nsDisplayListBuilder* aBuilder, nsIFrame *aFrame, nsDisplayList *aList, uint32_t aIndex) : nsDisplayItem(aBuilder, aFrame) , mStoredList(aBuilder, aFrame, aList) , mTransformGetter(nullptr) , mIndex(aIndex) { MOZ_COUNT_CTOR(nsDisplayTransform); NS_ABORT_IF_FALSE(aFrame, "Must have a frame!"); mReferenceFrame = aBuilder->FindReferenceFrameFor(GetTransformRootFrame(aFrame)); mToReferenceFrame = aFrame->GetOffsetToCrossDoc(mReferenceFrame); mStoredList.SetClip(aBuilder, DisplayItemClip::NoClip()); } nsDisplayTransform::nsDisplayTransform(nsDisplayListBuilder* aBuilder, nsIFrame *aFrame, nsDisplayItem *aItem, uint32_t aIndex) : nsDisplayItem(aBuilder, aFrame) , mStoredList(aBuilder, aFrame, aItem) , mTransformGetter(nullptr) , mIndex(aIndex) { MOZ_COUNT_CTOR(nsDisplayTransform); NS_ABORT_IF_FALSE(aFrame, "Must have a frame!"); mReferenceFrame = aBuilder->FindReferenceFrameFor(GetTransformRootFrame(aFrame)); mToReferenceFrame = aFrame->GetOffsetToCrossDoc(mReferenceFrame); mStoredList.SetClip(aBuilder, DisplayItemClip::NoClip()); } /* Returns the delta specified by the -moz-transform-origin property. * This is a positive delta, meaning that it indicates the direction to move * to get from (0, 0) of the frame to the transform origin. This function is * called off the main thread. */ /* static */ gfxPoint3D nsDisplayTransform::GetDeltaToTransformOrigin(const nsIFrame* aFrame, float aAppUnitsPerPixel, const nsRect* aBoundsOverride) { NS_PRECONDITION(aFrame, "Can't get delta for a null frame!"); NS_PRECONDITION(aFrame->IsTransformed() || aFrame->StyleDisplay()->BackfaceIsHidden(), "Shouldn't get a delta for an untransformed frame!"); if (!aFrame->IsTransformed()) { return gfxPoint3D(); } /* For both of the coordinates, if the value of -moz-transform is a * percentage, it's relative to the size of the frame. Otherwise, if it's * a distance, it's already computed for us! */ const nsStyleDisplay* display = aFrame->StyleDisplay(); nsRect boundingRect = (aBoundsOverride ? *aBoundsOverride : nsDisplayTransform::GetFrameBoundsForTransform(aFrame)); /* Allows us to access named variables by index. */ float coords[3]; const nscoord* dimensions[2] = {&boundingRect.width, &boundingRect.height}; for (uint8_t index = 0; index < 2; ++index) { /* If the -moz-transform-origin specifies a percentage, take the percentage * of the size of the box. */ const nsStyleCoord &coord = display->mTransformOrigin[index]; if (coord.GetUnit() == eStyleUnit_Calc) { const nsStyleCoord::Calc *calc = coord.GetCalcValue(); coords[index] = NSAppUnitsToFloatPixels(*dimensions[index], aAppUnitsPerPixel) * calc->mPercent + NSAppUnitsToFloatPixels(calc->mLength, aAppUnitsPerPixel); } else if (coord.GetUnit() == eStyleUnit_Percent) { coords[index] = NSAppUnitsToFloatPixels(*dimensions[index], aAppUnitsPerPixel) * coord.GetPercentValue(); } else { NS_ABORT_IF_FALSE(coord.GetUnit() == eStyleUnit_Coord, "unexpected unit"); coords[index] = NSAppUnitsToFloatPixels(coord.GetCoordValue(), aAppUnitsPerPixel); } if ((aFrame->GetStateBits() & NS_FRAME_SVG_LAYOUT) && coord.GetUnit() != eStyleUnit_Percent) { // values represent offsets from the origin of the SVG element's // user space, not the top left of its bounds, so we must adjust for that: nscoord offset = (index == 0) ? aFrame->GetPosition().x : aFrame->GetPosition().y; coords[index] -= NSAppUnitsToFloatPixels(offset, aAppUnitsPerPixel); } } coords[2] = NSAppUnitsToFloatPixels(display->mTransformOrigin[2].GetCoordValue(), aAppUnitsPerPixel); /* Adjust based on the origin of the rectangle. */ coords[0] += NSAppUnitsToFloatPixels(boundingRect.x, aAppUnitsPerPixel); coords[1] += NSAppUnitsToFloatPixels(boundingRect.y, aAppUnitsPerPixel); return gfxPoint3D(coords[0], coords[1], coords[2]); } /* Returns the delta specified by the -moz-perspective-origin property. * This is a positive delta, meaning that it indicates the direction to move * to get from (0, 0) of the frame to the perspective origin. This function is * called off the main thread. */ /* static */ gfxPoint3D nsDisplayTransform::GetDeltaToPerspectiveOrigin(const nsIFrame* aFrame, float aAppUnitsPerPixel) { NS_PRECONDITION(aFrame, "Can't get delta for a null frame!"); NS_PRECONDITION(aFrame->IsTransformed() || aFrame->StyleDisplay()->BackfaceIsHidden(), "Shouldn't get a delta for an untransformed frame!"); if (!aFrame->IsTransformed()) { return gfxPoint3D(); } /* For both of the coordinates, if the value of -moz-perspective-origin is a * percentage, it's relative to the size of the frame. Otherwise, if it's * a distance, it's already computed for us! */ //TODO: Should this be using our bounds or the parent's bounds? // How do we handle aBoundsOverride in the latter case? nsIFrame* parent = aFrame->GetParentStyleContextFrame(); if (!parent) { return gfxPoint3D(); } const nsStyleDisplay* display = parent->StyleDisplay(); nsRect boundingRect = nsDisplayTransform::GetFrameBoundsForTransform(parent); /* Allows us to access named variables by index. */ gfxPoint3D result; result.z = 0.0f; gfxFloat* coords[2] = {&result.x, &result.y}; const nscoord* dimensions[2] = {&boundingRect.width, &boundingRect.height}; for (uint8_t index = 0; index < 2; ++index) { /* If the -moz-transform-origin specifies a percentage, take the percentage * of the size of the box. */ const nsStyleCoord &coord = display->mPerspectiveOrigin[index]; if (coord.GetUnit() == eStyleUnit_Calc) { const nsStyleCoord::Calc *calc = coord.GetCalcValue(); *coords[index] = NSAppUnitsToFloatPixels(*dimensions[index], aAppUnitsPerPixel) * calc->mPercent + NSAppUnitsToFloatPixels(calc->mLength, aAppUnitsPerPixel); } else if (coord.GetUnit() == eStyleUnit_Percent) { *coords[index] = NSAppUnitsToFloatPixels(*dimensions[index], aAppUnitsPerPixel) * coord.GetPercentValue(); } else { NS_ABORT_IF_FALSE(coord.GetUnit() == eStyleUnit_Coord, "unexpected unit"); *coords[index] = NSAppUnitsToFloatPixels(coord.GetCoordValue(), aAppUnitsPerPixel); } } nsPoint parentOffset = aFrame->GetOffsetTo(parent); gfxPoint3D gfxOffset( NSAppUnitsToFloatPixels(parentOffset.x, aAppUnitsPerPixel), NSAppUnitsToFloatPixels(parentOffset.y, aAppUnitsPerPixel), 0.0f); return result - gfxOffset; } nsDisplayTransform::FrameTransformProperties::FrameTransformProperties(const nsIFrame* aFrame, float aAppUnitsPerPixel, const nsRect* aBoundsOverride) : mFrame(aFrame) , mTransformList(aFrame->StyleDisplay()->mSpecifiedTransform) , mToTransformOrigin(GetDeltaToTransformOrigin(aFrame, aAppUnitsPerPixel, aBoundsOverride)) , mToPerspectiveOrigin(GetDeltaToPerspectiveOrigin(aFrame, aAppUnitsPerPixel)) , mChildPerspective(0) { const nsStyleDisplay* parentDisp = nullptr; nsStyleContext* parentStyleContext = aFrame->StyleContext()->GetParent(); if (parentStyleContext) { parentDisp = parentStyleContext->StyleDisplay(); } if (parentDisp && parentDisp->mChildPerspective.GetUnit() == eStyleUnit_Coord) { mChildPerspective = parentDisp->mChildPerspective.GetCoordValue(); } } /* Wraps up the -moz-transform matrix in a change-of-basis matrix pair that * translates from local coordinate space to transform coordinate space, then * hands it back. */ gfx3DMatrix nsDisplayTransform::GetResultingTransformMatrix(const FrameTransformProperties& aProperties, const nsPoint& aOrigin, float aAppUnitsPerPixel, const nsRect* aBoundsOverride, nsIFrame** aOutAncestor) { return GetResultingTransformMatrixInternal(aProperties, aOrigin, aAppUnitsPerPixel, aBoundsOverride, aOutAncestor, false); } gfx3DMatrix nsDisplayTransform::GetResultingTransformMatrix(const nsIFrame* aFrame, const nsPoint& aOrigin, float aAppUnitsPerPixel, const nsRect* aBoundsOverride, nsIFrame** aOutAncestor, bool aOffsetByOrigin) { FrameTransformProperties props(aFrame, aAppUnitsPerPixel, aBoundsOverride); return GetResultingTransformMatrixInternal(props, aOrigin, aAppUnitsPerPixel, aBoundsOverride, aOutAncestor, aOffsetByOrigin); } gfx3DMatrix nsDisplayTransform::GetResultingTransformMatrixInternal(const FrameTransformProperties& aProperties, const nsPoint& aOrigin, float aAppUnitsPerPixel, const nsRect* aBoundsOverride, nsIFrame** aOutAncestor, bool aOffsetByOrigin) { const nsIFrame *frame = aProperties.mFrame; if (aOutAncestor) { *aOutAncestor = nsLayoutUtils::GetCrossDocParentFrame(frame); } /* Get the underlying transform matrix. This requires us to get the * bounds of the frame. */ nsRect bounds = (aBoundsOverride ? *aBoundsOverride : nsDisplayTransform::GetFrameBoundsForTransform(frame)); /* Get the matrix, then change its basis to factor in the origin. */ bool dummy; gfx3DMatrix result; // Call IsSVGTransformed() regardless of the value of // disp->mSpecifiedTransform, since we still need any transformFromSVGParent. mozilla::gfx::Matrix svgTransform, transformFromSVGParent; bool hasSVGTransforms = frame && frame->IsSVGTransformed(&svgTransform, &transformFromSVGParent); /* Transformed frames always have a transform, or are preserving 3d (and might still have perspective!) */ if (aProperties.mTransformList) { result = nsStyleTransformMatrix::ReadTransforms(aProperties.mTransformList->mHead, frame ? frame->StyleContext() : nullptr, frame ? frame->PresContext() : nullptr, dummy, bounds, aAppUnitsPerPixel); } else if (hasSVGTransforms) { // Correct the translation components for zoom: float pixelsPerCSSPx = frame->PresContext()->AppUnitsPerCSSPixel() / aAppUnitsPerPixel; svgTransform._31 *= pixelsPerCSSPx; svgTransform._32 *= pixelsPerCSSPx; result = gfx3DMatrix::From2D(ThebesMatrix(svgTransform)); } if (hasSVGTransforms && !transformFromSVGParent.IsIdentity()) { // Correct the translation components for zoom: float pixelsPerCSSPx = frame->PresContext()->AppUnitsPerCSSPixel() / aAppUnitsPerPixel; transformFromSVGParent._31 *= pixelsPerCSSPx; transformFromSVGParent._32 *= pixelsPerCSSPx; result = result * gfx3DMatrix::From2D(ThebesMatrix(transformFromSVGParent)); } if (aProperties.mChildPerspective > 0.0) { gfx3DMatrix perspective; perspective._34 = -1.0 / NSAppUnitsToFloatPixels(aProperties.mChildPerspective, aAppUnitsPerPixel); /* At the point when perspective is applied, we have been translated to the transform origin. * The translation to the perspective origin is the difference between these values. */ result = result * nsLayoutUtils::ChangeMatrixBasis(aProperties.mToPerspectiveOrigin - aProperties.mToTransformOrigin, perspective); } /* Account for the -moz-transform-origin property by translating the * coordinate space to the new origin. */ gfxPoint3D newOrigin = gfxPoint3D(NSAppUnitsToFloatPixels(aOrigin.x, aAppUnitsPerPixel), NSAppUnitsToFloatPixels(aOrigin.y, aAppUnitsPerPixel), 0.0f); gfxPoint3D roundedOrigin(hasSVGTransforms ? newOrigin.x : NS_round(newOrigin.x), hasSVGTransforms ? newOrigin.y : NS_round(newOrigin.y), 0); gfxPoint3D offsetBetweenOrigins = roundedOrigin + aProperties.mToTransformOrigin; if (frame && frame->Preserves3D()) { // Include the transform set on our parent NS_ASSERTION(frame->GetParent() && frame->GetParent()->IsTransformed() && frame->GetParent()->Preserves3DChildren(), "Preserve3D mismatch!"); FrameTransformProperties props(frame->GetParent(), aAppUnitsPerPixel, nullptr); gfx3DMatrix parent = GetResultingTransformMatrixInternal(props, aOrigin - frame->GetPosition(), aAppUnitsPerPixel, nullptr, aOutAncestor, false); result = nsLayoutUtils::ChangeMatrixBasis(offsetBetweenOrigins, result) * parent; if (aOffsetByOrigin) { result.Translate(roundedOrigin); } return result; } if (aOffsetByOrigin) { // We can fold the final translation by roundedOrigin into the first matrix // basis change translation. This is more stable against variation due to // insufficient floating point precision than reversing the translation // afterwards. result.Translate(-aProperties.mToTransformOrigin); result.TranslatePost(offsetBetweenOrigins); } else { result = nsLayoutUtils::ChangeMatrixBasis(offsetBetweenOrigins, result); } return result; } bool nsDisplayOpacity::CanUseAsyncAnimations(nsDisplayListBuilder* aBuilder) { if (ActiveLayerTracker::IsStyleAnimated(mFrame, eCSSProperty_opacity)) { return true; } if (nsLayoutUtils::IsAnimationLoggingEnabled()) { nsCString message; message.AppendLiteral("Performance warning: Async animation disabled because frame was not marked active for opacity animation"); CommonElementAnimationData::LogAsyncAnimationFailure(message, Frame()->GetContent()); } return false; } bool nsDisplayTransform::CanUseAsyncAnimations(nsDisplayListBuilder* aBuilder) { return ShouldPrerenderTransformedContent(aBuilder, Frame(), nsLayoutUtils::IsAnimationLoggingEnabled()); } /* static */ bool nsDisplayTransform::ShouldPrerenderTransformedContent(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame, bool aLogAnimations) { // Elements whose transform has been modified recently, or which // have a compositor-animated transform, can be prerendered. An element // might have only just had its transform animated in which case // the ActiveLayerManager may not have been notified yet. if (!ActiveLayerTracker::IsStyleAnimated(aFrame, eCSSProperty_transform) && (!aFrame->GetContent() || !nsLayoutUtils::HasAnimationsForCompositor(aFrame->GetContent(), eCSSProperty_transform))) { if (aLogAnimations) { nsCString message; message.AppendLiteral("Performance warning: Async animation disabled because frame was not marked active for transform animation"); CommonElementAnimationData::LogAsyncAnimationFailure(message, aFrame->GetContent()); } return false; } nsSize refSize = aBuilder->RootReferenceFrame()->GetSize(); // Only prerender if the transformed frame's size (in the reference // frames coordinate space) is <= the reference frame size (~viewport), // allowing a 1/8th fuzz factor for shadows, borders, etc. refSize += nsSize(refSize.width / 8, refSize.height / 8); nsRect frameRect = aFrame->GetVisualOverflowRectRelativeToSelf(); frameRect = nsLayoutUtils::TransformFrameRectToAncestor(aFrame, frameRect, aBuilder->RootReferenceFrame()); if (frameRect.Size() <= refSize) { return true; } if (aLogAnimations) { nsCString message; message.AppendLiteral("Performance warning: Async animation disabled because frame size ("); message.AppendInt(nsPresContext::AppUnitsToIntCSSPixels(frameRect.width)); message.AppendLiteral(", "); message.AppendInt(nsPresContext::AppUnitsToIntCSSPixels(frameRect.height)); message.AppendLiteral(") is bigger than the viewport ("); message.AppendInt(nsPresContext::AppUnitsToIntCSSPixels(refSize.width)); message.AppendLiteral(", "); message.AppendInt(nsPresContext::AppUnitsToIntCSSPixels(refSize.height)); message.Append(')'); CommonElementAnimationData::LogAsyncAnimationFailure(message, aFrame->GetContent()); } return false; } /* If the matrix is singular, or a hidden backface is shown, the frame won't be visible or hit. */ static bool IsFrameVisible(nsIFrame* aFrame, const gfx3DMatrix& aMatrix) { if (aMatrix.IsSingular()) { return false; } if (aFrame->StyleDisplay()->mBackfaceVisibility == NS_STYLE_BACKFACE_VISIBILITY_HIDDEN && aMatrix.IsBackfaceVisible()) { return false; } return true; } const gfx3DMatrix& nsDisplayTransform::GetTransform() { if (mTransform.IsIdentity()) { float scale = mFrame->PresContext()->AppUnitsPerDevPixel(); gfxPoint3D newOrigin = gfxPoint3D(NSAppUnitsToFloatPixels(mToReferenceFrame.x, scale), NSAppUnitsToFloatPixels(mToReferenceFrame.y, scale), 0.0f); if (mTransformGetter) { mTransform = mTransformGetter(mFrame, scale); mTransform = nsLayoutUtils::ChangeMatrixBasis(newOrigin, mTransform); } else { /** * Passing true as the final argument means that we want to shift the * coordinates to be relative to our reference frame instead of relative * to this frame. * When we have preserve-3d, our reference frame is already guaranteed * to be an ancestor of the preserve-3d chain, so we only need to do * this once. */ mTransform = GetResultingTransformMatrix(mFrame, ToReferenceFrame(), scale, nullptr, nullptr, true); } } return mTransform; } bool nsDisplayTransform::ShouldBuildLayerEvenIfInvisible(nsDisplayListBuilder* aBuilder) { return ShouldPrerenderTransformedContent(aBuilder, mFrame, false); } already_AddRefed nsDisplayTransform::BuildLayer(nsDisplayListBuilder *aBuilder, LayerManager *aManager, const ContainerLayerParameters& aContainerParameters) { const gfx3DMatrix& newTransformMatrix = GetTransform(); if (mFrame->StyleDisplay()->mBackfaceVisibility == NS_STYLE_BACKFACE_VISIBILITY_HIDDEN && newTransformMatrix.IsBackfaceVisible()) { return nullptr; } uint32_t flags = ShouldPrerenderTransformedContent(aBuilder, mFrame, false) ? FrameLayerBuilder::CONTAINER_NOT_CLIPPED_BY_ANCESTORS : 0; nsRefPtr container = aManager->GetLayerBuilder()-> BuildContainerLayerFor(aBuilder, aManager, mFrame, this, *mStoredList.GetChildren(), aContainerParameters, &newTransformMatrix, flags); if (!container) { return nullptr; } // Add the preserve-3d flag for this layer, BuildContainerLayerFor clears all flags, // so we never need to explicitely unset this flag. if (mFrame->Preserves3D() || mFrame->Preserves3DChildren()) { container->SetContentFlags(container->GetContentFlags() | Layer::CONTENT_PRESERVE_3D); } else { container->SetContentFlags(container->GetContentFlags() & ~Layer::CONTENT_PRESERVE_3D); } nsDisplayListBuilder::AddAnimationsAndTransitionsToLayer(container, aBuilder, this, mFrame, eCSSProperty_transform); if (ShouldPrerenderTransformedContent(aBuilder, mFrame, false)) { container->SetUserData(nsIFrame::LayerIsPrerenderedDataKey(), /*the value is irrelevant*/nullptr); container->SetContentFlags(container->GetContentFlags() | Layer::CONTENT_MAY_CHANGE_TRANSFORM); } else { container->RemoveUserData(nsIFrame::LayerIsPrerenderedDataKey()); container->SetContentFlags(container->GetContentFlags() & ~Layer::CONTENT_MAY_CHANGE_TRANSFORM); } return container.forget(); } nsDisplayItem::LayerState nsDisplayTransform::GetLayerState(nsDisplayListBuilder* aBuilder, LayerManager* aManager, const ContainerLayerParameters& aParameters) { // If the transform is 3d, or the layer takes part in preserve-3d sorting // then we *always* want this to be an active layer. if (!GetTransform().Is2D() || mFrame->Preserves3D()) { return LAYER_ACTIVE_FORCE; } // Here we check if the *post-transform* bounds of this item are big enough // to justify an active layer. if (ActiveLayerTracker::IsStyleAnimated(mFrame, eCSSProperty_transform) && !IsItemTooSmallForActiveLayer(this)) return LAYER_ACTIVE; if (mFrame->GetContent()) { if (nsLayoutUtils::HasAnimationsForCompositor(mFrame->GetContent(), eCSSProperty_transform)) { return LAYER_ACTIVE; } } const nsStyleDisplay* disp = mFrame->StyleDisplay(); if ((disp->mWillChangeBitField & NS_STYLE_WILL_CHANGE_TRANSFORM)) { return LAYER_ACTIVE; } // Expect the child display items to have this frame as their animated // geometry root (since it will be their reference frame). If they have a // different animated geometry root, we'll make this an active layer so the // animation can be accelerated. return RequiredLayerStateForChildren(aBuilder, aManager, aParameters, *mStoredList.GetChildren(), Frame()); } bool nsDisplayTransform::ComputeVisibility(nsDisplayListBuilder *aBuilder, nsRegion *aVisibleRegion, const nsRect& aAllowVisibleRegionExpansion) { /* As we do this, we need to be sure to * untransform the visible rect, since we want everything that's painting to * think that it's painting in its original rectangular coordinate space. * If we can't untransform, take the entire overflow rect */ nsRect untransformedVisibleRect; if (ShouldPrerenderTransformedContent(aBuilder, mFrame) || !UntransformVisibleRect(aBuilder, &untransformedVisibleRect)) { untransformedVisibleRect = mFrame->GetVisualOverflowRectRelativeToSelf(); } nsRegion untransformedVisible = untransformedVisibleRect; // Call RecomputeVisiblity instead of ComputeVisibility since // nsDisplayItem::ComputeVisibility should only be called from // nsDisplayList::ComputeVisibility (which sets mVisibleRect on the item) mStoredList.RecomputeVisibility(aBuilder, &untransformedVisible); return true; } #ifdef DEBUG_HIT #include #endif /* HitTest does some fun stuff with matrix transforms to obtain the answer. */ void nsDisplayTransform::HitTest(nsDisplayListBuilder *aBuilder, const nsRect& aRect, HitTestState *aState, nsTArray *aOutFrames) { /* Here's how this works: * 1. Get the matrix. If it's singular, abort (clearly we didn't hit * anything). * 2. Invert the matrix. * 3. Use it to transform the rect into the correct space. * 4. Pass that rect down through to the list's version of HitTest. */ // GetTransform always operates in dev pixels. float factor = mFrame->PresContext()->AppUnitsPerDevPixel(); gfx3DMatrix matrix = GetTransform(); if (!IsFrameVisible(mFrame, matrix)) { return; } /* We want to go from transformed-space to regular space. * Thus we have to invert the matrix, which normally does * the reverse operation (e.g. regular->transformed) */ bool snap; nsRect childBounds = mStoredList.GetBounds(aBuilder, &snap); gfxRect childGfxBounds(NSAppUnitsToFloatPixels(childBounds.x, factor), NSAppUnitsToFloatPixels(childBounds.y, factor), NSAppUnitsToFloatPixels(childBounds.width, factor), NSAppUnitsToFloatPixels(childBounds.height, factor)); /* Now, apply the transform and pass it down the channel. */ nsRect resultingRect; if (aRect.width == 1 && aRect.height == 1) { // Magic width/height indicating we're hit testing a point, not a rect gfxPoint point; if (!matrix.UntransformPoint(gfxPoint(NSAppUnitsToFloatPixels(aRect.x, factor), NSAppUnitsToFloatPixels(aRect.y, factor)), childGfxBounds, &point)) { return; } resultingRect = nsRect(NSFloatPixelsToAppUnits(float(point.x), factor), NSFloatPixelsToAppUnits(float(point.y), factor), 1, 1); } else { gfxRect originalRect(NSAppUnitsToFloatPixels(aRect.x, factor), NSAppUnitsToFloatPixels(aRect.y, factor), NSAppUnitsToFloatPixels(aRect.width, factor), NSAppUnitsToFloatPixels(aRect.height, factor)); gfxRect rect = matrix.UntransformBounds(originalRect, childGfxBounds); resultingRect = nsRect(NSFloatPixelsToAppUnits(float(rect.X()), factor), NSFloatPixelsToAppUnits(float(rect.Y()), factor), NSFloatPixelsToAppUnits(float(rect.Width()), factor), NSFloatPixelsToAppUnits(float(rect.Height()), factor)); } if (resultingRect.IsEmpty()) { return; } #ifdef DEBUG_HIT printf("Frame: %p\n", dynamic_cast(mFrame)); printf(" Untransformed point: (%f, %f)\n", resultingRect.X(), resultingRect.Y()); uint32_t originalFrameCount = aOutFrames.Length(); #endif mStoredList.HitTest(aBuilder, resultingRect, aState, aOutFrames); #ifdef DEBUG_HIT if (originalFrameCount != aOutFrames.Length()) printf(" Hit! Time: %f, first frame: %p\n", static_cast(clock()), dynamic_cast(aOutFrames.ElementAt(0))); printf("=== end of hit test ===\n"); #endif } float nsDisplayTransform::GetHitDepthAtPoint(nsDisplayListBuilder* aBuilder, const nsPoint& aPoint) { // GetTransform always operates in dev pixels. float factor = mFrame->PresContext()->AppUnitsPerDevPixel(); gfx3DMatrix matrix = GetTransform(); NS_ASSERTION(IsFrameVisible(mFrame, matrix), "We can't have hit a frame that isn't visible!"); bool snap; nsRect childBounds = mStoredList.GetBounds(aBuilder, &snap); gfxRect childGfxBounds(NSAppUnitsToFloatPixels(childBounds.x, factor), NSAppUnitsToFloatPixels(childBounds.y, factor), NSAppUnitsToFloatPixels(childBounds.width, factor), NSAppUnitsToFloatPixels(childBounds.height, factor)); gfxPoint point; DebugOnly result = matrix.UntransformPoint(gfxPoint(NSAppUnitsToFloatPixels(aPoint.x, factor), NSAppUnitsToFloatPixels(aPoint.y, factor)), childGfxBounds, &point); NS_ASSERTION(result, "Why are we trying to get the depth for a point we didn't hit?"); gfxPoint3D transformed = matrix.Transform3D(gfxPoint3D(point.x, point.y, 0)); return transformed.z; } /* The bounding rectangle for the object is the overflow rectangle translated * by the reference point. */ nsRect nsDisplayTransform::GetBounds(nsDisplayListBuilder *aBuilder, bool* aSnap) { nsRect untransformedBounds = ShouldPrerenderTransformedContent(aBuilder, mFrame) ? mFrame->GetVisualOverflowRectRelativeToSelf() : mStoredList.GetBounds(aBuilder, aSnap); *aSnap = false; // GetTransform always operates in dev pixels. float factor = mFrame->PresContext()->AppUnitsPerDevPixel(); return nsLayoutUtils::MatrixTransformRect(untransformedBounds, GetTransform(), factor); } /* The transform is opaque iff the transform consists solely of scales and * translations and if the underlying content is opaque. Thus if the transform * is of the form * * |a c e| * |b d f| * |0 0 1| * * We need b and c to be zero. * * We also need to check whether the underlying opaque content completely fills * our visible rect. We use UntransformRect which expands to the axis-aligned * bounding rect, but that's OK since if * mStoredList.GetVisibleRect().Contains(untransformedVisible), then it * certainly contains the actual (non-axis-aligned) untransformed rect. */ nsRegion nsDisplayTransform::GetOpaqueRegion(nsDisplayListBuilder *aBuilder, bool* aSnap) { *aSnap = false; nsRect untransformedVisible; // If we're going to prerender all our content, pretend like we // don't have opqaue content so that everything under us is rendered // as well. That will increase graphics memory usage if our frame // covers the entire window, but it allows our transform to be // updated extremely cheaply, without invalidating any other // content. if (ShouldPrerenderTransformedContent(aBuilder, mFrame) || !UntransformVisibleRect(aBuilder, &untransformedVisible)) { return nsRegion(); } const gfx3DMatrix& matrix = GetTransform(); nsRegion result; gfxMatrix matrix2d; bool tmpSnap; if (matrix.Is2D(&matrix2d) && matrix2d.PreservesAxisAlignedRectangles() && mStoredList.GetOpaqueRegion(aBuilder, &tmpSnap).Contains(untransformedVisible)) { result = mVisibleRect; } return result; } /* The transform is uniform if it fills the entire bounding rect and the * wrapped list is uniform. See GetOpaqueRegion for discussion of why this * works. */ bool nsDisplayTransform::IsUniform(nsDisplayListBuilder *aBuilder, nscolor* aColor) { nsRect untransformedVisible; if (!UntransformVisibleRect(aBuilder, &untransformedVisible)) { return false; } const gfx3DMatrix& matrix = GetTransform(); gfxMatrix matrix2d; return matrix.Is2D(&matrix2d) && matrix2d.PreservesAxisAlignedRectangles() && mStoredList.GetVisibleRect().Contains(untransformedVisible) && mStoredList.IsUniform(aBuilder, aColor); } /* If UNIFIED_CONTINUATIONS is defined, we can merge two display lists that * share the same underlying content. Otherwise, doing so results in graphical * glitches. */ #ifndef UNIFIED_CONTINUATIONS bool nsDisplayTransform::TryMerge(nsDisplayListBuilder *aBuilder, nsDisplayItem *aItem) { return false; } #else bool nsDisplayTransform::TryMerge(nsDisplayListBuilder *aBuilder, nsDisplayItem *aItem) { NS_PRECONDITION(aItem, "Why did you try merging with a null item?"); NS_PRECONDITION(aBuilder, "Why did you try merging with a null builder?"); /* Make sure that we're dealing with two transforms. */ if (aItem->GetType() != TYPE_TRANSFORM) return false; /* Check to see that both frames are part of the same content. */ if (aItem->Frame()->GetContent() != mFrame->GetContent()) return false; if (aItem->GetClip() != GetClip()) return false; /* Now, move everything over to this frame and signal that * we merged things! */ mStoredList.MergeFrom(&static_cast(aItem)->mStoredList); return true; } #endif /* TransformRect takes in as parameters a rectangle (in app space) and returns * the smallest rectangle (in app space) containing the transformed image of * that rectangle. That is, it takes the four corners of the rectangle, * transforms them according to the matrix associated with the specified frame, * then returns the smallest rectangle containing the four transformed points. * * @param aUntransformedBounds The rectangle (in app units) to transform. * @param aFrame The frame whose transformation should be applied. * @param aOrigin The delta from the frame origin to the coordinate space origin * @param aBoundsOverride (optional) Force the frame bounds to be the * specified bounds. * @return The smallest rectangle containing the image of the transformed * rectangle. */ nsRect nsDisplayTransform::TransformRect(const nsRect &aUntransformedBounds, const nsIFrame* aFrame, const nsPoint &aOrigin, const nsRect* aBoundsOverride) { NS_PRECONDITION(aFrame, "Can't take the transform based on a null frame!"); float factor = aFrame->PresContext()->AppUnitsPerDevPixel(); return nsLayoutUtils::MatrixTransformRect (aUntransformedBounds, GetResultingTransformMatrix(aFrame, aOrigin, factor, aBoundsOverride), factor); } nsRect nsDisplayTransform::TransformRectOut(const nsRect &aUntransformedBounds, const nsIFrame* aFrame, const nsPoint &aOrigin, const nsRect* aBoundsOverride) { NS_PRECONDITION(aFrame, "Can't take the transform based on a null frame!"); float factor = aFrame->PresContext()->AppUnitsPerDevPixel(); return nsLayoutUtils::MatrixTransformRectOut (aUntransformedBounds, GetResultingTransformMatrix(aFrame, aOrigin, factor, aBoundsOverride), factor); } bool nsDisplayTransform::UntransformRect(const nsRect &aTransformedBounds, const nsRect &aChildBounds, const nsIFrame* aFrame, const nsPoint &aOrigin, nsRect *aOutRect) { NS_PRECONDITION(aFrame, "Can't take the transform based on a null frame!"); float factor = aFrame->PresContext()->AppUnitsPerDevPixel(); gfx3DMatrix transform = GetResultingTransformMatrix(aFrame, aOrigin, factor, nullptr); if (transform.IsSingular()) { return false; } gfxRect result(NSAppUnitsToFloatPixels(aTransformedBounds.x, factor), NSAppUnitsToFloatPixels(aTransformedBounds.y, factor), NSAppUnitsToFloatPixels(aTransformedBounds.width, factor), NSAppUnitsToFloatPixels(aTransformedBounds.height, factor)); gfxRect childGfxBounds(NSAppUnitsToFloatPixels(aChildBounds.x, factor), NSAppUnitsToFloatPixels(aChildBounds.y, factor), NSAppUnitsToFloatPixels(aChildBounds.width, factor), NSAppUnitsToFloatPixels(aChildBounds.height, factor)); result = transform.UntransformBounds(result, childGfxBounds); *aOutRect = nsLayoutUtils::RoundGfxRectToAppRect(result, factor); return true; } bool nsDisplayTransform::UntransformVisibleRect(nsDisplayListBuilder* aBuilder, nsRect *aOutRect) { const gfx3DMatrix& matrix = GetTransform(); if (matrix.IsSingular()) return false; // GetTransform always operates in dev pixels. float factor = mFrame->PresContext()->AppUnitsPerDevPixel(); gfxRect result(NSAppUnitsToFloatPixels(mVisibleRect.x, factor), NSAppUnitsToFloatPixels(mVisibleRect.y, factor), NSAppUnitsToFloatPixels(mVisibleRect.width, factor), NSAppUnitsToFloatPixels(mVisibleRect.height, factor)); bool snap; nsRect childBounds = mStoredList.GetBounds(aBuilder, &snap); gfxRect childGfxBounds(NSAppUnitsToFloatPixels(childBounds.x, factor), NSAppUnitsToFloatPixels(childBounds.y, factor), NSAppUnitsToFloatPixels(childBounds.width, factor), NSAppUnitsToFloatPixels(childBounds.height, factor)); /* We want to untransform the matrix, so invert the transformation first! */ result = matrix.UntransformBounds(result, childGfxBounds); *aOutRect = nsLayoutUtils::RoundGfxRectToAppRect(result, factor); return true; } #ifdef MOZ_DUMP_PAINTING void nsDisplayTransform::WriteDebugInfo(nsACString& aTo) { gfx::Matrix4x4 transform; gfx::ToMatrix4x4(GetTransform(), transform); AppendToString(aTo, transform); } #endif nsDisplaySVGEffects::nsDisplaySVGEffects(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame, nsDisplayList* aList) : nsDisplayWrapList(aBuilder, aFrame, aList), mEffectsBounds(aFrame->GetVisualOverflowRectRelativeToSelf()) { MOZ_COUNT_CTOR(nsDisplaySVGEffects); } #ifdef NS_BUILD_REFCNT_LOGGING nsDisplaySVGEffects::~nsDisplaySVGEffects() { MOZ_COUNT_DTOR(nsDisplaySVGEffects); } #endif nsRegion nsDisplaySVGEffects::GetOpaqueRegion(nsDisplayListBuilder* aBuilder, bool* aSnap) { *aSnap = false; return nsRegion(); } void nsDisplaySVGEffects::HitTest(nsDisplayListBuilder* aBuilder, const nsRect& aRect, HitTestState* aState, nsTArray *aOutFrames) { nsPoint rectCenter(aRect.x + aRect.width / 2, aRect.y + aRect.height / 2); if (nsSVGIntegrationUtils::HitTestFrameForEffects(mFrame, rectCenter - ToReferenceFrame())) { mList.HitTest(aBuilder, aRect, aState, aOutFrames); } } void nsDisplaySVGEffects::PaintAsLayer(nsDisplayListBuilder* aBuilder, nsRenderingContext* aCtx, LayerManager* aManager) { nsSVGIntegrationUtils::PaintFramesWithEffects(aCtx, mFrame, mVisibleRect, aBuilder, aManager); } LayerState nsDisplaySVGEffects::GetLayerState(nsDisplayListBuilder* aBuilder, LayerManager* aManager, const ContainerLayerParameters& aParameters) { return LAYER_SVG_EFFECTS; } already_AddRefed nsDisplaySVGEffects::BuildLayer(nsDisplayListBuilder* aBuilder, LayerManager* aManager, const ContainerLayerParameters& aContainerParameters) { const nsIContent* content = mFrame->GetContent(); bool hasSVGLayout = (mFrame->GetStateBits() & NS_FRAME_SVG_LAYOUT); if (hasSVGLayout) { nsISVGChildFrame *svgChildFrame = do_QueryFrame(mFrame); if (!svgChildFrame || !mFrame->GetContent()->IsSVG()) { NS_ASSERTION(false, "why?"); return nullptr; } if (!static_cast(content)->HasValidDimensions()) { return nullptr; // The SVG spec says not to draw filters for this } } float opacity = mFrame->StyleDisplay()->mOpacity; if (opacity == 0.0f) return nullptr; nsIFrame* firstFrame = nsLayoutUtils::FirstContinuationOrIBSplitSibling(mFrame); nsSVGEffects::EffectProperties effectProperties = nsSVGEffects::GetEffectProperties(firstFrame); bool isOK = effectProperties.HasNoFilterOrHasValidFilter(); effectProperties.GetClipPathFrame(&isOK); effectProperties.GetMaskFrame(&isOK); if (!isOK) { return nullptr; } ContainerLayerParameters newContainerParameters = aContainerParameters; if (effectProperties.HasValidFilter()) { newContainerParameters.mDisableSubpixelAntialiasingInDescendants = true; } nsRefPtr container = aManager->GetLayerBuilder()-> BuildContainerLayerFor(aBuilder, aManager, mFrame, this, mList, newContainerParameters, nullptr); return container.forget(); } bool nsDisplaySVGEffects::ComputeVisibility(nsDisplayListBuilder* aBuilder, nsRegion* aVisibleRegion, const nsRect& aAllowVisibleRegionExpansion) { nsPoint offset = ToReferenceFrame(); nsRect dirtyRect = nsSVGIntegrationUtils::GetRequiredSourceForInvalidArea(mFrame, mVisibleRect - offset) + offset; // Our children may be made translucent or arbitrarily deformed so we should // not allow them to subtract area from aVisibleRegion. nsRegion childrenVisible(dirtyRect); nsRect r = dirtyRect.Intersect(mList.GetBounds(aBuilder)); mList.ComputeVisibilityForSublist(aBuilder, &childrenVisible, r, nsRect()); return true; } bool nsDisplaySVGEffects::TryMerge(nsDisplayListBuilder* aBuilder, nsDisplayItem* aItem) { if (aItem->GetType() != TYPE_SVG_EFFECTS) return false; // items for the same content element should be merged into a single // compositing group // aItem->GetUnderlyingFrame() returns non-null because it's nsDisplaySVGEffects if (aItem->Frame()->GetContent() != mFrame->GetContent()) return false; if (aItem->GetClip() != GetClip()) return false; nsDisplaySVGEffects* other = static_cast(aItem); MergeFromTrackingMergedFrames(other); mEffectsBounds.UnionRect(mEffectsBounds, other->mEffectsBounds + other->mFrame->GetOffsetTo(mFrame)); return true; } #ifdef MOZ_DUMP_PAINTING void nsDisplaySVGEffects::PrintEffects(nsACString& aTo) { nsIFrame* firstFrame = nsLayoutUtils::FirstContinuationOrIBSplitSibling(mFrame); nsSVGEffects::EffectProperties effectProperties = nsSVGEffects::GetEffectProperties(firstFrame); bool isOK = true; nsSVGClipPathFrame *clipPathFrame = effectProperties.GetClipPathFrame(&isOK); bool first = true; aTo += " effects=("; if (mFrame->StyleDisplay()->mOpacity != 1.0f) { first = false; aTo += nsPrintfCString("opacity(%f)", mFrame->StyleDisplay()->mOpacity); } if (clipPathFrame) { if (!first) { aTo += ", "; } aTo += nsPrintfCString("clip(%s)", clipPathFrame->IsTrivial() ? "trivial" : "non-trivial"); first = false; } if (effectProperties.HasValidFilter()) { if (!first) { aTo += ", "; } aTo += "filter"; first = false; } if (effectProperties.GetMaskFrame(&isOK)) { if (!first) { aTo += ", "; } aTo += "mask"; } aTo += ")"; } #endif