/* -*- 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 "nsDisplayList.h" #include #include #include "gfxUtils.h" #include "mozilla/dom/TabChild.h" #include "mozilla/dom/KeyframeEffect.h" #include "mozilla/gfx/2D.h" #include "mozilla/layers/PLayerTransaction.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 "gfxPrefs.h" #include "gfxVR.h" #include "nsSVGIntegrationUtils.h" #include "nsSVGUtils.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 "nsViewManager.h" #include "ImageLayers.h" #include "ImageContainer.h" #include "nsCanvasFrame.h" #include "StickyScrollContainer.h" #include "mozilla/AnimationUtils.h" #include "mozilla/EffectCompositor.h" #include "mozilla/EventStates.h" #include "mozilla/LookAndFeel.h" #include "mozilla/PendingAnimationTracker.h" #include "mozilla/Preferences.h" #include "mozilla/UniquePtr.h" #include "mozilla/unused.h" #include "ActiveLayerTracker.h" #include "nsContentUtils.h" #include "nsPrintfCString.h" #include "UnitTransforms.h" #include "LayersLogging.h" #include "FrameLayerBuilder.h" #include "mozilla/EventStateManager.h" #include "RestyleManager.h" #include "nsCaret.h" #include "nsISelection.h" #include "nsDOMTokenList.h" #include "mozilla/RuleNodeCacheConditions.h" #include "nsCSSProps.h" #include "nsPluginFrame.h" #include "DisplayItemScrollClip.h" // GetCurrentTime is defined in winbase.h as zero argument macro forwarding to // GetTickCount(). #ifdef GetCurrentTime #undef GetCurrentTime #endif using namespace mozilla; using namespace mozilla::layers; using namespace mozilla::dom; using namespace mozilla::layout; using namespace mozilla::gfx; typedef FrameMetrics::ViewID ViewID; typedef nsStyleTransformMatrix::TransformReferenceBox TransformReferenceBox; #ifdef DEBUG static bool SpammyLayoutWarningsEnabled() { static bool sValue = false; static bool sValueInitialized = false; if (!sValueInitialized) { Preferences::GetBool("layout.spammy_warnings.enabled", &sValue); sValueInitialized = true; } return sValue; } #endif void* AnimatedGeometryRoot::operator new(size_t aSize, nsDisplayListBuilder* aBuilder) { return aBuilder->Allocate(aSize); } static inline CSSAngle MakeCSSAngle(const nsCSSValue& aValue) { return CSSAngle(aValue.GetAngleValue(), aValue.GetUnit()); } static void AddTransformFunctions(nsCSSValueList* aList, nsStyleContext* aContext, nsPresContext* aPresContext, TransformReferenceBox& aRefBox, 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(); RuleNodeCacheConditions conditions; switch (nsStyleTransformMatrix::TransformFunctionOf(array)) { case eCSSKeyword_rotatex: { CSSAngle theta = MakeCSSAngle(array->Item(1)); aFunctions.AppendElement(RotationX(theta)); break; } case eCSSKeyword_rotatey: { CSSAngle theta = MakeCSSAngle(array->Item(1)); aFunctions.AppendElement(RotationY(theta)); break; } case eCSSKeyword_rotatez: { CSSAngle theta = MakeCSSAngle(array->Item(1)); aFunctions.AppendElement(RotationZ(theta)); break; } case eCSSKeyword_rotate: { CSSAngle theta = MakeCSSAngle(array->Item(1)); 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(); CSSAngle theta = MakeCSSAngle(array->Item(4)); 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, conditions, &aRefBox, &TransformReferenceBox::Width); aFunctions.AppendElement(Translation(x, 0, 0)); break; } case eCSSKeyword_translatey: { double y = nsStyleTransformMatrix::ProcessTranslatePart( array->Item(1), aContext, aPresContext, conditions, &aRefBox, &TransformReferenceBox::Height); aFunctions.AppendElement(Translation(0, y, 0)); break; } case eCSSKeyword_translatez: { double z = nsStyleTransformMatrix::ProcessTranslatePart( array->Item(1), aContext, aPresContext, conditions, nullptr); aFunctions.AppendElement(Translation(0, 0, z)); break; } case eCSSKeyword_translate: { double x = nsStyleTransformMatrix::ProcessTranslatePart( array->Item(1), aContext, aPresContext, conditions, &aRefBox, &TransformReferenceBox::Width); // translate(x) is shorthand for translate(x, 0) double y = 0; if (array->Count() == 3) { y = nsStyleTransformMatrix::ProcessTranslatePart( array->Item(2), aContext, aPresContext, conditions, &aRefBox, &TransformReferenceBox::Height); } aFunctions.AppendElement(Translation(x, y, 0)); break; } case eCSSKeyword_translate3d: { double x = nsStyleTransformMatrix::ProcessTranslatePart( array->Item(1), aContext, aPresContext, conditions, &aRefBox, &TransformReferenceBox::Width); double y = nsStyleTransformMatrix::ProcessTranslatePart( array->Item(2), aContext, aPresContext, conditions, &aRefBox, &TransformReferenceBox::Height); double z = nsStyleTransformMatrix::ProcessTranslatePart( array->Item(3), aContext, aPresContext, conditions, nullptr); aFunctions.AppendElement(Translation(x, y, z)); break; } case eCSSKeyword_skewx: { CSSAngle x = MakeCSSAngle(array->Item(1)); aFunctions.AppendElement(SkewX(x)); break; } case eCSSKeyword_skewy: { CSSAngle y = MakeCSSAngle(array->Item(1)); aFunctions.AppendElement(SkewY(y)); break; } case eCSSKeyword_skew: { CSSAngle x = MakeCSSAngle(array->Item(1)); // skew(x) is shorthand for skew(x, 0) CSSAngle y(0.0f, eCSSUnit_Degree); if (array->Count() == 3) { y = MakeCSSAngle(array->Item(2)); } 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: { Matrix4x4 matrix; nsStyleTransformMatrix::ProcessInterpolateMatrix(matrix, array, aContext, aPresContext, conditions, aRefBox); aFunctions.AppendElement(TransformMatrix(matrix)); break; } case eCSSKeyword_perspective: { aFunctions.AppendElement(Perspective(array->Item(1).GetFloatValue())); break; } default: NS_ERROR("Function not handled yet!"); } } } static TimingFunction ToTimingFunction(const ComputedTimingFunction& aCTF) { if (aCTF.HasSpline()) { const nsSMILKeySpline* spline = aCTF.GetFunction(); return TimingFunction(CubicBezierFunction(spline->X1(), spline->Y1(), spline->X2(), spline->Y2())); } uint32_t type = aCTF.GetType() == nsTimingFunction::Type::StepStart ? 1 : 2; return TimingFunction(StepFunction(aCTF.GetSteps(), type)); } static void AddAnimationForProperty(nsIFrame* aFrame, const AnimationProperty& aProperty, dom::Animation* aAnimation, Layer* aLayer, AnimationData& aData, bool aPending) { MOZ_ASSERT(aLayer->AsContainerLayer(), "Should only animate ContainerLayer"); MOZ_ASSERT(aAnimation->GetEffect(), "Should not be adding an animation without an effect"); MOZ_ASSERT(!aAnimation->GetCurrentOrPendingStartTime().IsNull() || (aAnimation->GetTimeline() && aAnimation->GetTimeline()->TracksWallclockTime()), "Animation should either have a resolved start time or " "a timeline that tracks wallclock time"); nsStyleContext* styleContext = aFrame->StyleContext(); nsPresContext* presContext = aFrame->PresContext(); TransformReferenceBox refBox(aFrame); layers::Animation* animation = aPending ? aLayer->AddAnimationForNextTransaction() : aLayer->AddAnimation(); const TimingParams& timing = aAnimation->GetEffect()->SpecifiedTiming(); const ComputedTiming computedTiming = aAnimation->GetEffect()->GetComputedTiming(); Nullable startTime = aAnimation->GetCurrentOrPendingStartTime(); animation->startTime() = startTime.IsNull() ? TimeStamp() : aAnimation->AnimationTimeToTimeStamp( StickyTimeDuration(timing.mDelay)); animation->initialCurrentTime() = aAnimation->GetCurrentTime().Value() - timing.mDelay; animation->duration() = computedTiming.mDuration; animation->iterations() = computedTiming.mIterations; animation->direction() = static_cast(timing.mDirection); animation->property() = aProperty.mProperty; animation->playbackRate() = aAnimation->PlaybackRate(); animation->data() = aData; for (uint32_t segIdx = 0; segIdx < aProperty.mSegments.Length(); segIdx++) { const AnimationPropertySegment& segment = aProperty.mSegments[segIdx]; AnimationSegment* animSegment = animation->segments().AppendElement(); if (aProperty.mProperty == eCSSProperty_transform) { animSegment->startState() = InfallibleTArray(); animSegment->endState() = InfallibleTArray(); nsCSSValueSharedList* list = segment.mFromValue.GetCSSValueSharedListValue(); AddTransformFunctions(list->mHead, styleContext, presContext, refBox, animSegment->startState().get_ArrayOfTransformFunction()); list = segment.mToValue.GetCSSValueSharedListValue(); AddTransformFunctions(list->mHead, styleContext, presContext, refBox, animSegment->endState().get_ArrayOfTransformFunction()); } else if (aProperty.mProperty == 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, AnimationPtrArray& aAnimations, Layer* aLayer, AnimationData& aData, bool aPending) { MOZ_ASSERT(nsCSSProps::PropHasFlags(aProperty, CSS_PROPERTY_CAN_ANIMATE_ON_COMPOSITOR), "inconsistent property flags"); // Add from first to last (since last overrides) for (size_t animIdx = 0; animIdx < aAnimations.Length(); animIdx++) { dom::Animation* anim = aAnimations[animIdx]; if (!anim->IsPlaying()) { continue; } dom::KeyframeEffectReadOnly* effect = anim->GetEffect(); MOZ_ASSERT(effect, "A playing animation should have an effect"); const AnimationProperty* property = effect->GetAnimationOfProperty(aProperty); if (!property) { continue; } // Note that if mWinsInCascade on property was false, // GetAnimationOfProperty returns null instead. // This is what we want, since if we have an animation or transition // that isn't actually winning in the CSS cascade, we don't want to // send it to the compositor. // I believe that anything that changes mWinsInCascade should // trigger this code again, either because of a restyle that changes // the properties in question, or because of the main-thread style // update that results when an animation stops being in effect. MOZ_ASSERT(property->mWinsInCascade, "GetAnimationOfProperty already tested mWinsInCascade"); // Don't add animations that are pending if their timeline does not // track wallclock time. This is because any pending animations on layers // will have their start time updated with the current wallclock time. // If we can't convert that wallclock time back to an equivalent timeline // time, we won't be able to update the content animation and it will end // up being out of sync with the layer animation. // // Currently this only happens when the timeline is driven by a refresh // driver under test control. In this case, the next time the refresh // driver is advanced it will trigger any pending animations. if (anim->PlayState() == AnimationPlayState::Pending && (!anim->GetTimeline() || !anim->GetTimeline()->TracksWallclockTime())) { continue; } AddAnimationForProperty(aFrame, *property, anim, aLayer, aData, aPending); effect->SetIsRunningOnCompositor(aProperty, true); } } /* static */ void nsDisplayListBuilder::AddAnimationsAndTransitionsToLayer(Layer* aLayer, nsDisplayListBuilder* aBuilder, nsDisplayItem* aItem, nsIFrame* aFrame, nsCSSProperty aProperty) { MOZ_ASSERT(nsCSSProps::PropHasFlags(aProperty, CSS_PROPERTY_CAN_ANIMATE_ON_COMPOSITOR), "inconsistent property flags"); // 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"); // Only send animations to a layer that is actually using // off-main-thread compositing. if (aLayer->Manager()->GetBackendType() != layers::LayersBackend::LAYERS_CLIENT) { return; } bool pending = !aBuilder; if (pending) { aLayer->ClearAnimationsForNextTransaction(); } else { aLayer->ClearAnimations(); } // Update the animation generation on the layer. We need to do this before // any early returns since even if we don't add any animations to the // layer, we still need to mark it as up-to-date with regards to animations. // Otherwise, in RestyleManager we'll notice the discrepancy between the // animation generation numbers and update the layer indefinitely. uint64_t animationGeneration = RestyleManager::GetAnimationGenerationForFrame(aFrame); aLayer->SetAnimationGeneration(animationGeneration); EffectCompositor::ClearIsRunningOnCompositor(aFrame, aProperty); nsTArray> compositorAnimations = EffectCompositor::GetAnimationsForCompositor(aFrame, aProperty); if (compositorAnimations.IsEmpty()) { 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)) { // EffectCompositor needs to know that we refused to run this animation // asynchronously so that it will not throttle the main thread // animation. aFrame->Properties().Set(nsIFrame::RefusedAsyncAnimationProperty(), true); // We need to schedule another refresh driver run so that EffectCompositor // gets a chance to unthrottle the animation. aFrame->SchedulePaint(); return; } AnimationData data; if (aProperty == eCSSProperty_transform) { // XXX Performance here isn't ideal for SVG. We'd prefer to avoid resolving // the dimensions of refBox. That said, we only get here if there are CSS // animations or transitions on this element, and that is likely to be a // lot rarer than transforms on SVG (the frequency of which drives the need // for TransformReferenceBox). TransformReferenceBox refBox(aFrame); nsRect bounds(0, 0, refBox.Width(), refBox.Height()); // all data passed directly to the compositor should be in dev pixels int32_t devPixelsToAppUnits = aFrame->PresContext()->AppUnitsPerDevPixel(); float scale = devPixelsToAppUnits; Point3D offsetToTransformOrigin = nsDisplayTransform::GetDeltaToTransformOrigin(aFrame, scale, &bounds); nsPoint origin; if (aItem) { // This branch is for display items to leverage the cache of // nsDisplayListBuilder. origin = aItem->ToReferenceFrame(); } else { // This branch is running for restyling. // Animations are animated at the coordination of the reference // frame outside, not the given frame itself. The given frame // is also reference frame too, so the parent's reference frame // are used. nsIFrame* referenceFrame = nsLayoutUtils::GetReferenceFrame(nsLayoutUtils::GetCrossDocParentFrame(aFrame)); origin = aFrame->GetOffsetToCrossDoc(referenceFrame); } data = TransformData(origin, offsetToTransformOrigin, bounds, devPixelsToAppUnits); } else if (aProperty == eCSSProperty_opacity) { data = null_t(); } AddAnimationsForProperty(aFrame, aProperty, compositorAnimations, aLayer, data, pending); } nsDisplayListBuilder::nsDisplayListBuilder(nsIFrame* aReferenceFrame, Mode aMode, bool aBuildCaret) : mReferenceFrame(aReferenceFrame), mIgnoreScrollFrame(nullptr), mLayerEventRegions(nullptr), mCurrentTableItem(nullptr), mCurrentFrame(aReferenceFrame), mCurrentReferenceFrame(aReferenceFrame), mCurrentAGR(&mRootAGR), mRootAGR(aReferenceFrame, nullptr), mDirtyRect(-1,-1,-1,-1), mGlassDisplayItem(nullptr), mPendingScrollInfoItems(nullptr), mCommittedScrollInfoItems(nullptr), mMode(aMode), mCurrentScrollParentId(FrameMetrics::NULL_SCROLL_ID), mCurrentScrollbarTarget(FrameMetrics::NULL_SCROLL_ID), mCurrentScrollbarFlags(0), mPerspectiveItemIndex(0), mIsBuildingScrollbar(false), mCurrentScrollbarWillHaveLayer(false), mBuildCaret(aBuildCaret), mIgnoreSuppression(false), mHadToIgnoreSuppression(false), mIsAtRootOfPseudoStackingContext(false), mIncludeAllOutOfFlows(false), mDescendIntoSubdocuments(true), mSelectedFramesOnly(false), mAccurateVisibleRegions(false), mAllowMergingAndFlattening(true), mWillComputePluginGeometry(false), mInTransform(false), mIsInChromePresContext(false), mSyncDecodeImages(false), mIsPaintingToWindow(false), mIsCompositingCheap(false), mContainsPluginItem(false), mAncestorHasApzAwareEventHandler(false), mHaveScrollableDisplayPort(false), mWindowDraggingAllowed(false), mIsBuildingForPopup(nsLayoutUtils::IsPopup(aReferenceFrame)), mForceLayerForScrollParent(false), mAsyncPanZoomEnabled(nsLayoutUtils::AsyncPanZoomEnabled(aReferenceFrame)) { 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)); } } mFrameToAnimatedGeometryRootMap.Put(aReferenceFrame, &mRootAGR); 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); mContainedBlendModes += nsCSSRendering::GetGFXBlendMode(aBlendMode); } bool nsDisplayListBuilder::NeedToForceTransparentSurfaceForItem(nsDisplayItem* aItem) { return aItem == mGlassDisplayItem || aItem->ClearsBackground(); } AnimatedGeometryRoot* nsDisplayListBuilder::WrapAGRForFrame(nsIFrame* aAnimatedGeometryRoot, AnimatedGeometryRoot* aParent /* = nullptr */) { MOZ_ASSERT(IsAnimatedGeometryRoot(aAnimatedGeometryRoot)); AnimatedGeometryRoot* result = nullptr; if (!mFrameToAnimatedGeometryRootMap.Get(aAnimatedGeometryRoot, &result)) { MOZ_ASSERT(nsLayoutUtils::IsAncestorFrameCrossDoc(RootReferenceFrame(), aAnimatedGeometryRoot)); AnimatedGeometryRoot* parent = aParent; if (!parent) { nsIFrame* parentFrame = nsLayoutUtils::GetCrossDocParentFrame(aAnimatedGeometryRoot); if (parentFrame) { nsIFrame* parentAGRFrame = FindAnimatedGeometryRootFrameFor(parentFrame); parent = WrapAGRForFrame(parentAGRFrame); } } result = new (this) AnimatedGeometryRoot(aAnimatedGeometryRoot, parent); mFrameToAnimatedGeometryRootMap.Put(aAnimatedGeometryRoot, result); } MOZ_ASSERT(!aParent || result->mParentAGR == aParent); return result; } AnimatedGeometryRoot* nsDisplayListBuilder::FindAnimatedGeometryRootFor(nsIFrame* aFrame) { if (!IsPaintingToWindow()) { return &mRootAGR; } if (aFrame == mCurrentFrame) { return mCurrentAGR; } AnimatedGeometryRoot* result = nullptr; if (mFrameToAnimatedGeometryRootMap.Get(aFrame, &result)) { return result; } nsIFrame* agrFrame = FindAnimatedGeometryRootFrameFor(aFrame); result = WrapAGRForFrame(agrFrame); mFrameToAnimatedGeometryRootMap.Put(aFrame, result); return result; } AnimatedGeometryRoot* nsDisplayListBuilder::FindAnimatedGeometryRootFor(nsDisplayItem* aItem) { if (aItem->ShouldFixToViewport(this)) { // Make its active scrolled root be the active scrolled root of // the enclosing viewport, since it shouldn't be scrolled by scrolled // frames in its document. InvalidateFixedBackgroundFramesFromList in // nsGfxScrollFrame will not repaint this item when scrolling occurs. nsIFrame* viewportFrame = nsLayoutUtils::GetClosestFrameOfType(aItem->Frame(), nsGkAtoms::viewportFrame, RootReferenceFrame()); if (viewportFrame) { return FindAnimatedGeometryRootFor(viewportFrame); } } return FindAnimatedGeometryRootFor(aItem->Frame()); } void nsDisplayListBuilder::MarkOutOfFlowFrameForDisplay(nsIFrame* aDirtyFrame, nsIFrame* aFrame, const nsRect& aDirtyRect) { nsRect dirtyRectRelativeToDirtyFrame = aDirtyRect; if (nsLayoutUtils::IsFixedPosFrameInDisplayPort(aFrame) && IsPaintingToWindow()) { 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() && EffectCompositor::HasAnimationsForCompositor(aFrame, 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* oldClip = mClipState.GetClipForContainingBlockDescendants(); const DisplayItemScrollClip* sc = mClipState.GetCurrentInnermostScrollClip(); OutOfFlowDisplayData* data = new OutOfFlowDisplayData(oldClip, sc, 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); } } 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 (DisplayItemClip* c : mDisplayItemClipsToDestroy) { c->DisplayItemClip::~DisplayItemClip(); } for (DisplayItemScrollClip* c : mScrollClipsToDestroy) { c->DisplayItemScrollClip::~DisplayItemScrollClip(); } 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() { RefPtr caret = CurrentPresShellState()->mPresShell->GetCaret(); return caret; } void nsDisplayListBuilder::EnterPresShell(nsIFrame* aReferenceFrame, bool aPointerEventsNoneDoc) { PresShellState* state = mPresShellStates.AppendElement(); 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; } bool pointerEventsNone = aPointerEventsNoneDoc; if (IsInSubdocument()) { pointerEventsNone |= mPresShellStates[mPresShellStates.Length() - 2].mInsidePointerEventsNoneDoc; } state->mInsidePointerEventsNoneDoc = pointerEventsNone; if (!buildCaret) return; RefPtr caret = state->mPresShell->GetCaret(); state->mCaretFrame = caret->GetPaintGeometry(&state->mCaretRect); if (state->mCaretFrame) { mFramesMarkedForDisplay.AppendElement(state->mCaretFrame); MarkFrameForDisplay(state->mCaretFrame, nullptr); } nsPresContext* pc = aReferenceFrame->PresContext(); pc->GetDocShell()->GetWindowDraggingAllowed(&mWindowDraggingAllowed); mIsInChromePresContext = pc->IsChrome(); } void nsDisplayListBuilder::LeavePresShell(nsIFrame* aReferenceFrame) { NS_ASSERTION(CurrentPresShellState()->mPresShell == aReferenceFrame->PresContext()->PresShell(), "Presshell mismatch"); ResetMarkedFramesForDisplayList(); mPresShellStates.SetLength(mPresShellStates.Length() - 1); if (!mPresShellStates.IsEmpty()) { nsPresContext* pc = CurrentPresContext(); pc->GetDocShell()->GetWindowDraggingAllowed(&mWindowDraggingAllowed); mIsInChromePresContext = pc->IsChrome(); } } 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 (nsIFrame* e : aFrames) { // Skip the AccessibleCaret frame when building no caret. if (!IsBuildingCaret()) { nsIContent* content = e->GetContent(); if (content && content->IsInNativeAnonymousSubtree() && content->IsElement()) { ErrorResult rv; auto classList = content->AsElement()->ClassList(); if (classList->Contains(NS_LITERAL_STRING("moz-accessiblecaret"), rv)) { continue; } } } mFramesMarkedForDisplay.AppendElement(e); MarkOutOfFlowFrameForDisplay(aDirtyFrame, e, aDirtyRect); } } /** * Mark all preserve-3d children with * NS_FRAME_FORCE_DISPLAY_LIST_DESCEND_INTO to make sure * nsFrame::BuildDisplayListForChild() would visit them. Also compute * dirty rect for preserve-3d children. * * @param aDirtyFrame is the frame to mark children extending context. * @param aDirtyRect is the same as the dirty rect of the root of the * current 3D context, but be translated relative to * the aDirtyFrame. */ 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->Combines3DTransformWithAncestors()) { 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_ABORT_OOM(aSize); } 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; } DisplayItemScrollClip* nsDisplayListBuilder::AllocateDisplayItemScrollClip(const DisplayItemScrollClip* aParent, const DisplayItemScrollClip* aCrossStackingContextParent, nsIScrollableFrame* aScrollableFrame, const DisplayItemClip* aClip, bool aIsAsyncScrollable) { void* p = Allocate(sizeof(DisplayItemScrollClip)); DisplayItemScrollClip* c = new (p) DisplayItemScrollClip(aParent, aCrossStackingContextParent, aScrollableFrame, aClip, aIsAsyncScrollable); mScrollClipsToDestroy.AppendElement(c); return c; } const nsIFrame* nsDisplayListBuilder::FindReferenceFrameFor(const nsIFrame *aFrame, nsPoint* aOffset) { if (aFrame == mCurrentFrame) { if (aOffset) { *aOffset = mCurrentOffsetToReferenceFrame; } return mCurrentReferenceFrame; } for (const nsIFrame* f = aFrame; f; f = nsLayoutUtils::GetCrossDocParentFrame(f)) { if (f == mReferenceFrame || f->IsTransformed()) { if (aOffset) { *aOffset = aFrame->GetOffsetToCrossDoc(f); } return f; } } if (aOffset) { *aOffset = aFrame->GetOffsetToCrossDoc(mReferenceFrame); } return mReferenceFrame; } // Sticky frames are active if their nearest scrollable frame is also active. static bool IsStickyFrameActive(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame, nsIFrame* aParent) { MOZ_ASSERT(aFrame->StyleDisplay()->mPosition == NS_STYLE_POSITION_STICKY); // Find the nearest scrollframe. nsIFrame* cursor = aFrame; nsIFrame* parent = aParent; if (!parent) { parent = nsLayoutUtils::GetCrossDocParentFrame(aFrame); } while (parent->GetType() != nsGkAtoms::scrollFrame) { cursor = parent; if ((parent = nsLayoutUtils::GetCrossDocParentFrame(cursor)) == nullptr) { return false; } } nsIScrollableFrame* sf = do_QueryFrame(parent); return sf->IsScrollingActive(aBuilder) && sf->GetScrolledFrame() == cursor; } bool nsDisplayListBuilder::IsAnimatedGeometryRoot(nsIFrame* aFrame, nsIFrame** aParent) { if (aFrame == mReferenceFrame) { return true; } if (!IsPaintingToWindow()) { if (aParent) { *aParent = nsLayoutUtils::GetCrossDocParentFrame(aFrame); } return false; } if (nsLayoutUtils::IsPopup(aFrame)) return true; if (ActiveLayerTracker::IsOffsetOrMarginStyleAnimated(aFrame)) return true; if (!aFrame->GetParent() && nsLayoutUtils::ViewportHasDisplayPort(aFrame->PresContext())) { // Viewport frames in a display port need to be animated geometry roots // for background-attachment:fixed elements. return true; } if (aFrame->IsTransformed()) { return true; } nsIFrame* parent = nsLayoutUtils::GetCrossDocParentFrame(aFrame); if (!parent) return true; nsIAtom* parentType = parent->GetType(); // Treat the slider thumb as being as an active scrolled root when it wants // its own layer so that it can move without repainting. if (parentType == nsGkAtoms::sliderFrame && nsLayoutUtils::IsScrollbarThumbLayerized(aFrame)) { return true; } if (aFrame->StyleDisplay()->mPosition == NS_STYLE_POSITION_STICKY && IsStickyFrameActive(this, aFrame, parent)) { return true; } if (parentType == nsGkAtoms::scrollFrame || parentType == nsGkAtoms::listControlFrame) { nsIScrollableFrame* sf = do_QueryFrame(parent); if (sf->IsScrollingActive(this) && sf->GetScrolledFrame() == aFrame) { return true; } } // Fixed-pos frames are parented by the viewport frame, which has no parent. if (nsLayoutUtils::IsFixedPosFrameInDisplayPort(aFrame)) { return true; } if (aParent) { *aParent = parent; } return false; } nsIFrame* nsDisplayListBuilder::FindAnimatedGeometryRootFrameFor(nsIFrame* aFrame) { MOZ_ASSERT(nsLayoutUtils::IsAncestorFrameCrossDoc(RootReferenceFrame(), aFrame)); nsIFrame* cursor = aFrame; while (cursor != RootReferenceFrame()) { nsIFrame* next; if (IsAnimatedGeometryRoot(cursor, &next)) return cursor; cursor = next; } return cursor; } void nsDisplayListBuilder::RecomputeCurrentAnimatedGeometryRoot() { if (*mCurrentAGR != mCurrentFrame && IsAnimatedGeometryRoot(const_cast(mCurrentFrame))) { AnimatedGeometryRoot* oldAGR = mCurrentAGR; mCurrentAGR = WrapAGRForFrame(const_cast(mCurrentFrame), mCurrentAGR); // Iterate the AGR cache and look for any objects that reference the old AGR and check // to see if they need to be updated. AGRs can be in the cache multiple times, so we may // end up doing the work multiple times for AGRs that don't change. for (auto iter = mFrameToAnimatedGeometryRootMap.Iter(); !iter.Done(); iter.Next()) { AnimatedGeometryRoot* cached = iter.UserData(); if (cached->mParentAGR == oldAGR && cached != mCurrentAGR) { // It's possible that this cached AGR struct that has the old AGR as a parent // should instead have mCurrentFrame has a parent. nsIFrame* parent = FindAnimatedGeometryRootFrameFor(*cached); MOZ_ASSERT(parent == mCurrentFrame || parent == *oldAGR); if (parent == mCurrentFrame) { cached->mParentAGR = mCurrentAGR; } } } } } void nsDisplayListBuilder::AdjustWindowDraggingRegion(nsIFrame* aFrame) { if (!mWindowDraggingAllowed || !IsForPainting()) { return; } LayoutDeviceToLayoutDeviceMatrix4x4 referenceFrameToRootReferenceFrame; // The const_cast is for nsLayoutUtils::GetTransformToAncestor. nsIFrame* referenceFrame = const_cast(FindReferenceFrameFor(aFrame)); if (IsInTransform()) { // Only support 2d rectilinear transforms. Transform support is needed for // the horizontal flip transform that's applied to the urlbar textbox in // RTL mode - it should be able to exclude itself from the draggable region. referenceFrameToRootReferenceFrame = ViewAs( nsLayoutUtils::GetTransformToAncestor(referenceFrame, mReferenceFrame)); Matrix referenceFrameToRootReferenceFrame2d; if (!referenceFrameToRootReferenceFrame.Is2D(&referenceFrameToRootReferenceFrame2d) || !referenceFrameToRootReferenceFrame2d.IsRectilinear()) { return; } } else { MOZ_ASSERT(referenceFrame == mReferenceFrame, "referenceFrameToRootReferenceFrame needs to be adjusted"); } // We do some basic visibility checking on the frame's border box here. // We intersect it both with the current dirty rect and with the current // clip. Either one is just a conservative approximation on its own, but // their intersection luckily works well enough for our purposes, so that // we don't have to do full-blown visibility computations. // The most important case we need to handle is the scrolled-off tab: // If the tab bar overflows, tab parts that are clipped by the scrollbox // should not be allowed to interfere with the window dragging region. Using // just the current DisplayItemClip is not enough to cover this case // completely because clips are reset while building stacking context // contents, so for example we'd fail to clip frames that have a clip path // applied to them. But the current dirty rect doesn't get reset in that // case, so we use it to make this case work. nsRect borderBox = aFrame->GetRectRelativeToSelf().Intersect(mDirtyRect); borderBox += ToReferenceFrame(aFrame); const DisplayItemClip* clip = ClipState().GetCurrentCombinedClip(this); if (clip) { borderBox = clip->ApplyNonRoundedIntersection(borderBox); } if (!borderBox.IsEmpty()) { LayoutDeviceRect devPixelBorderBox = LayoutDevicePixel::FromAppUnits(borderBox, aFrame->PresContext()->AppUnitsPerDevPixel()); LayoutDeviceRect transformedDevPixelBorderBox = TransformBy(referenceFrameToRootReferenceFrame, devPixelBorderBox); transformedDevPixelBorderBox.Round(); LayoutDeviceIntRect transformedDevPixelBorderBoxInt; if (transformedDevPixelBorderBox.ToIntRect(&transformedDevPixelBorderBoxInt)) { const nsStyleUserInterface* styleUI = aFrame->StyleUserInterface(); if (styleUI->mWindowDragging == NS_STYLE_WINDOW_DRAGGING_DRAG) { mWindowDraggingRegion.OrWith(transformedDevPixelBorderBoxInt); } else { mWindowDraggingRegion.SubOut(transformedDevPixelBorderBoxInt); } } } } const uint32_t gWillChangeAreaMultiplier = 3; static uint32_t GetWillChangeCost(const nsSize& aSize) { // There's significant overhead for each layer created from Gecko // (IPC+Shared Objects) and from the backend (like an OpenGL texture). // Therefore we set a minimum cost threshold of a 64x64 area. int minBudgetCost = 64 * 64; uint32_t budgetCost = std::max(minBudgetCost, nsPresContext::AppUnitsToIntCSSPixels(aSize.width) * nsPresContext::AppUnitsToIntCSSPixels(aSize.height)); return budgetCost; } bool nsDisplayListBuilder::AddToWillChangeBudget(nsIFrame* aFrame, const nsSize& aSize) { if (mBudgetSet.Contains(aFrame)) { return true; // Already accounted } nsPresContext* key = aFrame->PresContext(); if (!mWillChangeBudget.Contains(key)) { mWillChangeBudget.Put(key, DocumentWillChangeBudget()); } DocumentWillChangeBudget budget; mWillChangeBudget.Get(key, &budget); nsRect area = aFrame->PresContext()->GetVisibleArea(); uint32_t budgetLimit = nsPresContext::AppUnitsToIntCSSPixels(area.width) * nsPresContext::AppUnitsToIntCSSPixels(area.height); uint32_t cost = GetWillChangeCost(aSize); bool onBudget = (budget.mBudget + cost) / gWillChangeAreaMultiplier < budgetLimit; if (onBudget) { budget.mBudget += cost; mWillChangeBudget.Put(key, budget); mBudgetSet.PutEntry(aFrame); } return onBudget; } bool nsDisplayListBuilder::IsInWillChangeBudget(nsIFrame* aFrame, const nsSize& aSize) { bool onBudget = AddToWillChangeBudget(aFrame, aSize); if (!onBudget) { nsString usageStr; usageStr.AppendInt(GetWillChangeCost(aSize)); nsString multiplierStr; multiplierStr.AppendInt(gWillChangeAreaMultiplier); nsString limitStr; nsRect area = aFrame->PresContext()->GetVisibleArea(); uint32_t budgetLimit = nsPresContext::AppUnitsToIntCSSPixels(area.width) * nsPresContext::AppUnitsToIntCSSPixels(area.height); limitStr.AppendInt(budgetLimit); const char16_t* params[] = { multiplierStr.get(), limitStr.get() }; aFrame->PresContext()->Document()->WarnOnceAbout( nsIDocument::eIgnoringWillChangeOverBudget, false, params, ArrayLength(params)); } return onBudget; } nsDisplayList* nsDisplayListBuilder::EnterScrollInfoItemHoisting(nsDisplayList* aScrollInfoItemStorage) { MOZ_ASSERT(ShouldBuildScrollInfoItemsForHoisting()); nsDisplayList* old = mPendingScrollInfoItems; mPendingScrollInfoItems = aScrollInfoItemStorage; return old; } void nsDisplayListBuilder::LeaveScrollInfoItemHoisting(nsDisplayList* aScrollInfoItemStorage) { MOZ_ASSERT(ShouldBuildScrollInfoItemsForHoisting()); mPendingScrollInfoItems = aScrollInfoItemStorage; } void nsDisplayListBuilder::AppendNewScrollInfoItemForHoisting(nsDisplayScrollInfoLayer* aScrollInfoItem) { MOZ_ASSERT(ShouldBuildScrollInfoItemsForHoisting()); mPendingScrollInfoItems->AppendNewToTop(aScrollInfoItem); } void nsDisplayListBuilder::StoreDirtyRectForScrolledContents(const nsIFrame* aScrollableFrame, const nsRect& aDirty) { mDirtyRectForScrolledContents.Put(const_cast(aScrollableFrame), aDirty + ToReferenceFrame(aScrollableFrame)); } nsRect nsDisplayListBuilder::GetDirtyRectForScrolledContents(const nsIFrame* aScrollableFrame) const { nsRect result; if (!mDirtyRectForScrolledContents.Get(const_cast(aScrollableFrame), &result)) { return nsRect(); } return result; } bool nsDisplayListBuilder::IsBuildingLayerEventRegions() { if (mMode == PAINTING) { // Note: this is the only place that gets to query LayoutEventRegionsEnabled // 'directly' - other code should call this function. return gfxPrefs::LayoutEventRegionsEnabledDoNotUseDirectly() || mAsyncPanZoomEnabled; } return false; } 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()); } static void MoveListTo(nsDisplayList* aList, nsTArray* aElements) { nsDisplayItem* item; while ((item = aList->RemoveBottom()) != nullptr) { 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; } nsRect nsDisplayList::GetScrollClippedBoundsUpTo(nsDisplayListBuilder* aBuilder, const DisplayItemScrollClip* aIncludeScrollClipsUpTo) const { nsRect bounds; for (nsDisplayItem* i = GetBottom(); i != nullptr; i = i->GetAbove()) { bounds.UnionRect(bounds, i->GetScrollClippedBoundsUpTo(aBuilder, aIncludeScrollClipsUpTo)); } return bounds; } nsRect nsDisplayList::GetVisibleRect() const { nsRect result; for (nsDisplayItem* i = GetBottom(); i != nullptr; i = i->GetAbove()) { result.UnionRect(result, i->GetVisibleRect()); } return result; } bool nsDisplayList::ComputeVisibilityForRoot(nsDisplayListBuilder* aBuilder, nsRegion* aVisibleRegion) { PROFILER_LABEL("nsDisplayList", "ComputeVisibilityForRoot", js::ProfileEntry::Category::GRAPHICS); nsRegion r; r.And(*aVisibleRegion, GetBounds(aBuilder)); return ComputeVisibilityForSublist(aBuilder, aVisibleRegion, r.GetBounds()); } static nsRegion TreatAsOpaque(nsDisplayItem* aItem, nsDisplayListBuilder* aBuilder) { bool snap; nsRegion opaque = aItem->GetOpaqueRegion(aBuilder, &snap); if (aBuilder->IsForPluginGeometry() && aItem->GetType() != nsDisplayItem::TYPE_LAYER_EVENT_REGIONS) { // 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; for (auto iter = opaque.RectIter(); !iter.Done(); iter.Next()) { opaqueClipped.Or(opaqueClipped, aItem->GetClip().ApproximateIntersectInward(iter.Get())); } return opaqueClipped; } bool nsDisplayList::ComputeVisibilityForSublist(nsDisplayListBuilder* aBuilder, nsRegion* aVisibleRegion, const nsRect& aListVisibleBounds) { #ifdef DEBUG nsRegion r; r.And(*aVisibleRegion, GetBounds(aBuilder)); NS_ASSERTION(r.GetBounds().IsEqualInterior(aListVisibleBounds), "bad aListVisibleBounds"); #endif bool anyVisible = false; nsAutoTArray elements; MoveListTo(this, &elements); for (int32_t i = elements.Length() - 1; i >= 0; --i) { nsDisplayItem* item = elements[i]; nsRect bounds = item->GetClippedBounds(aBuilder); nsRegion itemVisible; itemVisible.And(*aVisibleRegion, bounds); item->mVisibleRect = itemVisible.GetBounds(); if (item->ComputeVisibility(aBuilder, aVisibleRegion)) { anyVisible = true; nsRegion opaque = TreatAsOpaque(item, aBuilder); // Subtract opaque item from the visible region aBuilder->SubtractFromVisibleRegion(aVisibleRegion, opaque); } AppendToBottom(item); } mIsOpaque = !aVisibleRegion->Intersects(aListVisibleBounds); return anyVisible; } static bool TriggerPendingAnimationsOnSubDocuments(nsIDocument* aDocument, void* aReadyTime) { PendingAnimationTracker* tracker = aDocument->GetPendingAnimationTracker(); if (tracker) { nsIPresShell* shell = aDocument->GetShell(); // If paint-suppression is in effect then we haven't finished painting // this document yet so we shouldn't start animations if (!shell || !shell->IsPaintingSuppressed()) { const TimeStamp& readyTime = *static_cast(aReadyTime); tracker->TriggerPendingAnimationsOnNextTick(readyTime); } } aDocument->EnumerateSubDocuments(TriggerPendingAnimationsOnSubDocuments, aReadyTime); return true; } static void TriggerPendingAnimations(nsIDocument* aDocument, const TimeStamp& aReadyTime) { MOZ_ASSERT(!aReadyTime.IsNull(), "Animation ready time is not set. Perhaps we're using a layer" " manager that doesn't update it"); TriggerPendingAnimationsOnSubDocuments(aDocument, const_cast(&aReadyTime)); } LayerManager* nsDisplayListBuilder::GetWidgetLayerManager(nsView** aView, bool* aAllowRetaining) { nsView* view = RootReferenceFrame()->GetView(); if (aView) { *aView = view; } if (RootReferenceFrame() != nsLayoutUtils::GetDisplayRootFrame(RootReferenceFrame())) { return nullptr; } nsIWidget* window = RootReferenceFrame()->GetNearestWidget(); if (window) { return window->GetLayerManager(aAllowRetaining); } return nullptr; } /** * 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 PaintedLayers. */ already_AddRefed nsDisplayList::PaintRoot(nsDisplayListBuilder* aBuilder, nsRenderingContext* aCtx, uint32_t aFlags) { PROFILER_LABEL("nsDisplayList", "PaintRoot", js::ProfileEntry::Category::GRAPHICS); RefPtr layerManager; bool widgetTransaction = false; bool allowRetaining = false; bool doBeginTransaction = true; nsView *view = nullptr; if (aFlags & PAINT_USE_WIDGET_LAYERS) { layerManager = aBuilder->GetWidgetLayerManager(&view, &allowRetaining); if (layerManager) { doBeginTransaction = !(aFlags & PAINT_EXISTING_TRANSACTION); widgetTransaction = true; } } if (!layerManager) { if (!aCtx) { NS_WARNING("Nowhere to paint into"); return nullptr; } layerManager = new BasicLayerManager(BasicLayerManager::BLM_OFFSCREEN); } // 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 (doBeginTransaction) { if (aCtx) { layerManager->BeginTransactionWithTarget(aCtx->ThebesContext()); } else { layerManager->BeginTransaction(); } } if (widgetTransaction) { layerBuilder->DidBeginRetainedLayerTransaction(layerManager); } nsIFrame* frame = aBuilder->RootReferenceFrame(); nsPresContext* presContext = frame->PresContext(); nsIPresShell* presShell = presContext->GetPresShell(); nsRootPresContext* rootPresContext = presContext->GetRootPresContext(); NotifySubDocInvalidationFunc computeInvalidFunc = presContext->MayHavePaintEventListenerInSubDocument() ? nsPresContext::NotifySubDocInvalidation : 0; bool computeInvalidRect = (computeInvalidFunc || (!layerManager->IsCompositingCheap() && layerManager->NeedsWidgetInvalidation())) && widgetTransaction; UniquePtr props; if (computeInvalidRect) { props = Move(LayerProperties::CloneFrom(layerManager->GetRoot())); } // Clear any FrameMetrics that may have been set on the root layer on a // previous paint. This paint will set new metrics if necessary, and if we // don't clear the old one here, we may be left with extra metrics. if (Layer* root = layerManager->GetRoot()) { root->SetFrameMetrics(nsTArray()); } ContainerLayerParameters containerParameters (presShell->GetResolution(), presShell->GetResolution()); RefPtr root = layerBuilder-> BuildContainerLayerFor(aBuilder, layerManager, frame, nullptr, this, containerParameters, nullptr); nsIDocument* document = nullptr; if (presShell) { document = presShell->GetDocument(); } if (!root) { layerManager->SetUserData(&gLayerManagerLayerBuilder, oldBuilder); return nullptr; } // Root is being scaled up by the X/Y resolution. Scale it back down. root->SetPostScale(1.0f/containerParameters.mXScale, 1.0f/containerParameters.mYScale); root->SetScaleToResolution(presShell->ScaleToResolution(), containerParameters.mXScale); if (aBuilder->IsBuildingLayerEventRegions() && nsLayoutUtils::HasDocumentLevelListenersForApzAwareEvents(presShell)) { root->SetEventRegionsOverride(EventRegionsOverride::ForceDispatchToContent); } else { root->SetEventRegionsOverride(EventRegionsOverride::NoOverride); } // If we're using containerless scrolling, there is still one case where we // want the root container layer to have metrics. If the parent process is // using XUL windows, there is no root scrollframe, and without explicitly // creating metrics there will be no guaranteed top-level APZC. bool addMetrics = gfxPrefs::LayoutUseContainersForRootFrames() || (XRE_IsParentProcess() && !presShell->GetRootScrollFrame()); // Add metrics if there are none in the layer tree with the id (create an id // if there isn't one already) of the root scroll frame/root content. bool ensureMetricsForRootId = nsLayoutUtils::AsyncPanZoomEnabled(frame) && !gfxPrefs::LayoutUseContainersForRootFrames() && aBuilder->IsPaintingToWindow() && !presContext->GetParentPresContext(); nsIContent* content = nullptr; nsIFrame* rootScrollFrame = presShell->GetRootScrollFrame(); if (rootScrollFrame) { content = rootScrollFrame->GetContent(); } else { // If there is no root scroll frame, pick the document element instead. // The only case we don't want to do this is in non-APZ fennec, where // we want the root xul document to get a null scroll id so that the root // content document gets the first non-null scroll id. #if !defined(MOZ_WIDGET_ANDROID) || defined(MOZ_ANDROID_APZ) content = document->GetDocumentElement(); #endif } if (ensureMetricsForRootId && content) { ViewID scrollId = nsLayoutUtils::FindOrCreateIDFor(content); if (nsLayoutUtils::ContainsMetricsWithId(root, scrollId)) { ensureMetricsForRootId = false; } } if (addMetrics || ensureMetricsForRootId) { bool isRootContent = presContext->IsRootContentDocument(); nsRect viewport(aBuilder->ToReferenceFrame(frame), frame->GetSize()); root->SetFrameMetrics( nsLayoutUtils::ComputeFrameMetrics(frame, rootScrollFrame, content, aBuilder->FindReferenceFrameFor(frame), root, FrameMetrics::NULL_SCROLL_ID, viewport, Nothing(), isRootContent, containerParameters)); } // NS_WARNING is debug-only, so don't even bother checking the conditions in // a release build. #ifdef DEBUG bool usingDisplayport = false; if (nsIFrame* rootScrollFrame = presShell->GetRootScrollFrame()) { nsIContent* content = rootScrollFrame->GetContent(); if (content) { usingDisplayport = nsLayoutUtils::HasDisplayPort(content); } } if (usingDisplayport && !(root->GetContentFlags() & Layer::CONTENT_OPAQUE) && SpammyLayoutWarningsEnabled()) { // See bug 693938, attachment 567017 NS_WARNING("Transparent content with displayports can be expensive."); } #endif layerManager->SetRoot(root); layerBuilder->WillEndTransaction(); 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())) { frame->ClearInvalidationStateBits(); } 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; } } // If this is the content process, we ship plugin geometry updates over with layer // updates, so calculate that now before we call EndTransaction. if (rootPresContext && XRE_IsContentProcess()) { if (aBuilder->WillComputePluginGeometry()) { rootPresContext->ComputePluginGeometryUpdates(aBuilder->RootReferenceFrame(), aBuilder, this); } // The layer system caches plugin configuration information for forwarding // with layer updates which needs to get set during reflow. This must be // called even if there are no windowed plugins in the page. rootPresContext->CollectPluginGeometryUpdates(layerManager); } MaybeSetupTransactionIdAllocator(layerManager, view); layerManager->EndTransaction(FrameLayerBuilder::DrawPaintedLayer, aBuilder, flags); aBuilder->SetIsCompositingCheap(temp); layerBuilder->DidEndTransaction(); if (document && widgetTransaction) { TriggerPendingAnimations(document, layerManager->GetAnimationReadyTime()); } 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); } } layerManager->SetUserData(&gLayerManagerLayerBuilder, oldBuilder); return layerManager.forget(); } 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 { explicit FramesWithDepth(float aDepth) : mDepth(aDepth) {} bool operator<(const FramesWithDepth& aOther) const { if (!FuzzyEqual(mDepth, aOther.mDepth, 0.1f)) { // 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->AppendElements(Move(aSource[i].mFrames)); } aSource.Clear(); } void nsDisplayList::HitTest(nsDisplayListBuilder* aBuilder, const nsRect& aRect, nsDisplayItem::HitTestState* aState, nsTArray *aOutFrames) const { nsDisplayItem* item; if (aState->mInPreserves3D) { // Collect leaves of the current 3D rendering context. for (item = GetBottom(); item; item = item->GetAbove()) { auto itemType = item->GetType(); if (itemType != nsDisplayItem::TYPE_TRANSFORM || !static_cast(item)->IsLeafOf3DContext()) { item->HitTest(aBuilder, aRect, aState, aOutFrames); } else { // One of leaves in the current 3D rendering context. aState->mItemBuffer.AppendElement(item); } } return; } int32_t itemBufferStart = aState->mItemBuffer.Length(); 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); auto itemType = item->GetType(); bool same3DContext = (itemType == nsDisplayItem::TYPE_TRANSFORM && static_cast(item)->IsParticipating3DContext()) || (itemType == nsDisplayItem::TYPE_PERSPECTIVE && static_cast(item)->Frame()->Extend3DContext()); if (same3DContext && !static_cast(item)->IsLeafOf3DContext()) { if (!item->GetClip().MayIntersect(aRect)) { continue; } nsAutoTArray neverUsed; // Start gethering leaves of the 3D rendering context, and // append leaves at the end of mItemBuffer. Leaves are // processed at following iterations. aState->mInPreserves3D = true; item->HitTest(aBuilder, aRect, aState, &neverUsed); aState->mInPreserves3D = false; i = aState->mItemBuffer.Length(); continue; } if (same3DContext || 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 && static_cast(item)->IsLeafOf3DContext()) { 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 IsCSSOrderLEQ(nsDisplayItem* aItem1, nsDisplayItem* aItem2, void*) { nsIFrame* frame1 = aItem1->Frame(); nsIFrame* frame2 = aItem2->Frame(); int32_t order1 = frame1 ? frame1->StylePosition()->mOrder : 0; int32_t order2 = frame2 ? frame2->StylePosition()->mOrder : 0; return order1 <= order2; } 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() { Sort(IsZOrderLEQ, nullptr); } void nsDisplayList::SortByContentOrder(nsIContent* aCommonAncestor) { Sort(IsContentLEQ, aCommonAncestor); } void nsDisplayList::SortByCSSOrder() { Sort(IsCSSOrderLEQ, nullptr); } void nsDisplayList::Sort(SortLEQ aCmp, void* aClosure) { ::Sort(this, Count(), aCmp, aClosure); } nsDisplayItem::nsDisplayItem(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame) : mFrame(aFrame) , mClip(aBuilder->ClipState().GetCurrentCombinedClip(aBuilder)) , mScrollClip(aBuilder->ClipState().GetCurrentInnermostScrollClip()) , mAnimatedGeometryRoot(nullptr) #ifdef MOZ_DUMP_PAINTING , mPainted(false) #endif { mReferenceFrame = aBuilder->FindReferenceFrameFor(aFrame, &mToReferenceFrame); // This can return the wrong result if the item override ShouldFixToViewport(), // the item needs to set it again in its constructor. mAnimatedGeometryRoot = aBuilder->FindAnimatedGeometryRootFor(aFrame); MOZ_ASSERT(nsLayoutUtils::IsAncestorFrameCrossDoc(aBuilder->RootReferenceFrame(), *mAnimatedGeometryRoot), "Bad"); NS_ASSERTION(aBuilder->GetDirtyRect().width >= 0 || !aBuilder->IsForPainting(), "dirty rect not set"); // The dirty rect is for mCurrentFrame, so we have to use // mCurrentOffsetToReferenceFrame mVisibleRect = aBuilder->GetDirtyRect() + aBuilder->GetCurrentFrameOffsetToReferenceFrame(); } /* 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; } static int32_t ZIndexForFrame(nsIFrame* aFrame) { if (!aFrame->IsAbsPosContaininingBlock() && !aFrame->IsFlexOrGridItem()) return 0; const nsStylePosition* position = aFrame->StylePosition(); if (position->mZIndex.GetUnit() == eStyleUnit_Integer) return position->mZIndex.GetIntValue(); // sort the auto and 0 elements together return 0; } int32_t nsDisplayItem::ZIndex() const { return ZIndexForFrame(mFrame); } bool nsDisplayItem::ComputeVisibility(nsDisplayListBuilder* aBuilder, nsRegion* aVisibleRegion) { 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)) { mVisibleRect = 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 nsDisplayItem::GetScrollClippedBoundsUpTo(nsDisplayListBuilder* aBuilder, const DisplayItemScrollClip* aIncludeScrollClipsUpTo) { nsRect r = GetClippedBounds(aBuilder); for (const DisplayItemScrollClip* sc = mScrollClip; sc && sc != aIncludeScrollClipsUpTo; sc = sc->mParent) { if (sc->mClip) { r = sc->mClip->ApplyNonRoundedIntersection(r); } } return r; } nsRect nsDisplaySolidColor::GetBounds(nsDisplayListBuilder* aBuilder, bool* aSnap) { *aSnap = true; return mBounds; } void nsDisplaySolidColor::Paint(nsDisplayListBuilder* aBuilder, nsRenderingContext* aCtx) { int32_t appUnitsPerDevPixel = mFrame->PresContext()->AppUnitsPerDevPixel(); DrawTarget* drawTarget = aCtx->GetDrawTarget(); Rect rect = NSRectToSnappedRect(mVisibleRect, appUnitsPerDevPixel, *drawTarget); drawTarget->FillRect(rect, ColorPattern(ToDeviceColor(mColor))); } void nsDisplaySolidColor::WriteDebugInfo(std::stringstream& aStream) { aStream << " (rgba " << (int)NS_GET_R(mColor) << "," << (int)NS_GET_G(mColor) << "," << (int)NS_GET_B(mColor) << "," << (int)NS_GET_A(mColor) << ")"; } static void RegisterThemeGeometry(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame, nsITheme::ThemeGeometryType aType) { if (aBuilder->IsInRootChromeDocumentOrPopup() && !aBuilder->IsInTransform()) { nsIFrame* displayRoot = nsLayoutUtils::GetDisplayRootFrame(aFrame); nsRect borderBox(aFrame->GetOffsetTo(displayRoot), aFrame->GetSize()); aBuilder->RegisterThemeGeometry(aType, LayoutDeviceIntRect::FromUnknownRect( 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); mDestArea = GetDestAreaInternal(aBuilder); if (ShouldFixToViewport(aBuilder)) { mAnimatedGeometryRoot = aBuilder->FindAnimatedGeometryRootFor(this); } } nsRect nsDisplayBackgroundImage::GetDestAreaInternal(nsDisplayListBuilder* aBuilder) { if (!mBackgroundStyle) { return nsRect(); } nsPresContext* presContext = mFrame->PresContext(); uint32_t flags = aBuilder->GetBackgroundPaintFlags(); nsRect borderArea = nsRect(ToReferenceFrame(), mFrame->GetSize()); const nsStyleImageLayers::Layer& layer = mBackgroundStyle->mLayers.mLayers[mLayer]; nsBackgroundLayerState state = nsCSSRendering::PrepareImageLayer(presContext, mFrame, flags, borderArea, borderArea, layer); return state.mDestArea; } 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 */ void SetBackgroundClipRegion(DisplayListClipState::AutoSaveRestore& aClipState, nsIFrame* aFrame, const nsPoint& aToReferenceFrame, const nsStyleImageLayers::Layer& aLayer, bool aWillPaintBorder) { nsRect borderBox = nsRect(aToReferenceFrame, aFrame->GetSize()); nsCSSRendering::ImageLayerClipState clip; nsCSSRendering::GetImageLayerClip(aLayer, aFrame, *aFrame->StyleBorder(), borderBox, borderBox, aWillPaintBorder, aFrame->PresContext()->AppUnitsPerDevPixel(), &clip); if (clip.mHasAdditionalBGClipArea) { aClipState.ClipContentDescendants(clip.mAdditionalBGClipArea, clip.mBGClipArea, clip.mHasRoundedCorners ? clip.mRadii : nullptr); } else { aClipState.ClipContentDescendants(clip.mBGClipArea, clip.mHasRoundedCorners ? clip.mRadii : nullptr); } } /*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; // Dummy initialisation to keep Valgrind/Memcheck happy. // See bug 1122375 comment 1. nscolor color = NS_RGBA(0,0,0,0); if (!nsCSSRendering::IsCanvasFrame(aFrame) && bg) { bool drawBackgroundImage; color = nsCSSRendering::DetermineBackgroundColor(presContext, bgSC, aFrame, drawBackgroundImage, drawBackgroundColor); } const nsStyleBorder* borderStyle = aFrame->StyleBorder(); bool hasInsetShadow = borderStyle->mBoxShadow && borderStyle->mBoxShadow->HasShadowWithInset(true); bool willPaintBorder = !isThemed && !hasInsetShadow && borderStyle->HasBorder(); nsPoint toRef = aBuilder->ToReferenceFrame(aFrame); // 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()) { DisplayListClipState::AutoSaveRestore clipState(aBuilder); if (bg && !aBuilder->IsForEventDelivery()) { // Disable the will-paint-border optimization for background // colors with no border-radius. Enabling it for background colors // doesn't help much (there are no tiling issues) and clipping the // background breaks detection of the element's border-box being // opaque. For nonzero border-radius we still need it because we // want to inset the background if possible to avoid antialiasing // artifacts along the rounded corners. bool useWillPaintBorderOptimization = willPaintBorder && nsLayoutUtils::HasNonZeroCorner(borderStyle->mBorderRadius); SetBackgroundClipRegion(clipState, aFrame, toRef, bg->BottomLayer(), useWillPaintBorderOptimization); } bgItemList.AppendNewToTop( new (aBuilder) nsDisplayBackgroundColor(aBuilder, aFrame, bg, drawBackgroundColor ? color : NS_RGBA(0, 0, 0, 0))); } if (isThemed) { nsITheme* theme = presContext->GetTheme(); if (theme->NeedToClearBackgroundBehindWidget(aFrame, aFrame->StyleDisplay()->mAppearance) && aBuilder->IsInRootChromeDocumentOrPopup() && !aBuilder->IsInTransform()) { bgItemList.AppendNewToTop( new (aBuilder) nsDisplayClearBackground(aBuilder, aFrame)); } 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_IMAGE_LAYERS_BACK_TO_FRONT(i, bg->mLayers) { if (bg->mLayers.mLayers[i].mImage.IsEmpty()) { continue; } if (bg->mLayers.mLayers[i].mBlendMode != NS_STYLE_BLEND_NORMAL) { needBlendContainer = true; } DisplayListClipState::AutoSaveRestore clipState(aBuilder); if (!aBuilder->IsForEventDelivery()) { const nsStyleImageLayers::Layer& layer = bg->mLayers.mLayers[i]; SetBackgroundClipRegion(clipState, aFrame, toRef, layer, willPaintBorder); } nsDisplayBackgroundImage* bgItem = new (aBuilder) nsDisplayBackgroundImage(aBuilder, aFrame, i, bg); if (bgItem->ShouldFixToViewport(aBuilder)) { bgItemList.AppendNewToTop( nsDisplayFixedPosition::CreateForFixedBackground(aBuilder, aFrame, bgItem, i)); } else { 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.mLayers.Length() != 1) return false; nsPresContext* presContext = mFrame->PresContext(); uint32_t flags = aBuilder->GetBackgroundPaintFlags(); nsRect borderArea = nsRect(ToReferenceFrame(), mFrame->GetSize()); const nsStyleImageLayers::Layer &layer = mBackgroundStyle->mLayers.mLayers[mLayer]; if (layer.mAttachment != NS_STYLE_IMAGELAYER_ATTACHMENT_FIXED) return false; nsBackgroundLayerState state = nsCSSRendering::PrepareImageLayer(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::IsNonEmptyFixedImage() const { return mBackgroundStyle->mLayers.mLayers[mLayer].mAttachment == NS_STYLE_IMAGELAYER_ATTACHMENT_FIXED && !mBackgroundStyle->mLayers.mLayers[mLayer].mImage.IsEmpty(); } bool nsDisplayBackgroundImage::ShouldFixToViewport(nsDisplayListBuilder* aBuilder) { // APZ needs background-attachment:fixed images layerized for correctness. RefPtr layerManager = aBuilder->GetWidgetLayerManager(); if (!nsLayoutUtils::UsesAsyncScrolling(mFrame) && layerManager && layerManager->ShouldAvoidComponentAlphaLayers()) { return false; } // Put background-attachment:fixed background images in their own // compositing layer. return IsNonEmptyFixedImage(); } bool nsDisplayBackgroundImage::CanOptimizeToImageLayer(LayerManager* aManager, nsDisplayListBuilder* aBuilder) { if (!mBackgroundStyle) { return false; } nsPresContext* presContext = mFrame->PresContext(); uint32_t flags = aBuilder->GetBackgroundPaintFlags(); nsRect borderArea = nsRect(ToReferenceFrame(), mFrame->GetSize()); const nsStyleImageLayers::Layer &layer = mBackgroundStyle->mLayers.mLayers[mLayer]; nsBackgroundLayerState state = nsCSSRendering::PrepareImageLayer(presContext, mFrame, flags, borderArea, borderArea, layer); nsImageRenderer* imageRenderer = &state.mImageRenderer; // We only care about images here, not gradients. if (!imageRenderer->IsRasterImage()) { return false; } if (!imageRenderer->IsContainerAvailable(aManager, aBuilder)) { // The image is not ready to be made into a layer yet. return false; } // We currently can't handle tiled backgrounds. if (!state.mDestArea.Contains(state.mFillArea)) { return false; } // For 'contain' and 'cover', we allow any pixel of the image to be sampled // because there isn't going to be any spriting/atlasing going on. bool allowPartialImages = (layer.mSize.mWidthType == nsStyleImageLayers::Size::eContain || layer.mSize.mWidthType == nsStyleImageLayers::Size::eCover); if (!allowPartialImages && !state.mFillArea.Contains(state.mDestArea)) { 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(); mImageLayerDestRect = LayoutDeviceRect::FromAppUnits(state.mDestArea, appUnitsPerDevPixel); // Ok, we can turn this into a layer if needed. mImage = imageRenderer->GetImage(); MOZ_ASSERT(mImage); return true; } already_AddRefed nsDisplayBackgroundImage::GetContainer(LayerManager* aManager, nsDisplayListBuilder *aBuilder) { if (!mImage) { MOZ_ASSERT_UNREACHABLE("Must call CanOptimizeToImage() and get true " "before calling GetContainer()"); return nullptr; } if (!mImageContainer) { // We don't have an ImageContainer yet; get it from mImage. uint32_t flags = aBuilder->ShouldSyncDecodeImages() ? imgIContainer::FLAG_SYNC_DECODE : imgIContainer::FLAG_NONE; mImageContainer = mImage->GetImageContainer(aManager, flags); } RefPtr container = mImageContainer; return container.forget(); } nsDisplayBackgroundImage::ImageLayerization nsDisplayBackgroundImage::ShouldCreateOwnLayer(nsDisplayListBuilder* aBuilder, LayerManager* aManager) { nsIFrame* backgroundStyleFrame = nsCSSRendering::FindBackgroundStyleFrame(mFrame); if (ActiveLayerTracker::IsStyleAnimated(aBuilder, backgroundStyleFrame, eCSSProperty_background_position)) { return WHENEVER_POSSIBLE; } if (nsLayoutUtils::AnimatedImageLayersEnabled() && mBackgroundStyle) { const nsStyleImageLayers::Layer &layer = mBackgroundStyle->mLayers.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) { bool animated = false; if (NS_SUCCEEDED(image->GetAnimated(&animated)) && animated) { return WHENEVER_POSSIBLE; } } } } if (nsLayoutUtils::GPUImageScalingEnabled() && aManager->IsCompositingCheap()) { return ONLY_FOR_SCALING; } return NO_LAYER_NEEDED; } LayerState nsDisplayBackgroundImage::GetLayerState(nsDisplayListBuilder* aBuilder, LayerManager* aManager, const ContainerLayerParameters& aParameters) { ImageLayerization shouldLayerize = ShouldCreateOwnLayer(aBuilder, aManager); if (shouldLayerize == NO_LAYER_NEEDED) { // We can skip the call to CanOptimizeToImageLayer if we don't want a // layer anyway. return LAYER_NONE; } if (CanOptimizeToImageLayer(aManager, aBuilder)) { if (shouldLayerize == WHENEVER_POSSIBLE) { return LAYER_ACTIVE; } MOZ_ASSERT(shouldLayerize == ONLY_FOR_SCALING, "unhandled ImageLayerization value?"); MOZ_ASSERT(mImage); int32_t imageWidth; int32_t imageHeight; mImage->GetWidth(&imageWidth); mImage->GetHeight(&imageHeight); NS_ASSERTION(imageWidth != 0 && imageHeight != 0, "Invalid image size!"); const LayerRect destLayerRect = mImageLayerDestRect * aParameters.Scale(); // Calculate the scaling factor for the frame. const gfxSize scale = gfxSize(destLayerRect.width / imageWidth, destLayerRect.height / imageHeight); if ((scale.width != 1.0f || scale.height != 1.0f) && (destLayerRect.width * destLayerRect.height >= 64 * 64)) { // Separate this image into a layer. // There's no point in doing this if we are not scaling at all or if the // target size is pretty small. return LAYER_ACTIVE; } } return LAYER_NONE; } already_AddRefed nsDisplayBackgroundImage::BuildLayer(nsDisplayListBuilder* aBuilder, LayerManager* aManager, const ContainerLayerParameters& aParameters) { RefPtr layer = static_cast (aManager->GetLayerBuilder()->GetLeafLayerFor(aBuilder, this)); if (!layer) { layer = aManager->CreateImageLayer(); if (!layer) return nullptr; } RefPtr imageContainer = GetContainer(aManager, aBuilder); layer->SetContainer(imageContainer); ConfigureLayer(layer, aParameters); return layer.forget(); } void nsDisplayBackgroundImage::ConfigureLayer(ImageLayer* aLayer, const ContainerLayerParameters& aParameters) { aLayer->SetFilter(nsLayoutUtils::GetGraphicsFilterForFrame(mFrame)); MOZ_ASSERT(mImage); int32_t imageWidth; int32_t imageHeight; mImage->GetWidth(&imageWidth); mImage->GetHeight(&imageHeight); NS_ASSERTION(imageWidth != 0 && imageHeight != 0, "Invalid image size!"); if (imageWidth > 0 && imageHeight > 0) { // We're actually using the ImageContainer. Let our frame know that it // should consider itself to have painted successfully. nsDisplayBackgroundGeometry::UpdateDrawResult(this, image::DrawResult::SUCCESS); } // XXX(seth): Right now we ignore aParameters.Scale() and // aParameters.Offset(), because FrameLayerBuilder already applies // aParameters.Scale() via the layer's post-transform, and // aParameters.Offset() is always zero. MOZ_ASSERT(aParameters.Offset() == LayerIntPoint(0,0)); const LayoutDevicePoint p = mImageLayerDestRect.TopLeft(); Matrix transform = Matrix::Translation(p.x, p.y); transform.PreScale(mImageLayerDestRect.width / imageWidth, mImageLayerDestRect.height / imageHeight); aLayer->SetBaseTransform(gfx::Matrix4x4::From2D(transform)); } 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) { if (!nsDisplayItem::ComputeVisibility(aBuilder, aVisibleRegion)) { 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, uint8_t aClip, const nsRect& aRect) { nsRegion result; if (aRect.IsEmpty()) return result; nsIFrame *frame = aItem->Frame(); nsRect clipRect; if (frame->GetType() == nsGkAtoms::canvasFrame) { nsCanvasFrame* canvasFrame = static_cast(frame); clipRect = canvasFrame->CanvasArea() + aItem->ToReferenceFrame(); } else { switch (aClip) { case NS_STYLE_IMAGELAYER_CLIP_BORDER: clipRect = nsRect(aItem->ToReferenceFrame(), frame->GetSize()); break; case NS_STYLE_IMAGELAYER_CLIP_PADDING: clipRect = frame->GetPaddingRect() - frame->GetPosition() + aItem->ToReferenceFrame(); break; case NS_STYLE_IMAGELAYER_CLIP_CONTENT: clipRect = frame->GetContentRectRelativeToSelf() + aItem->ToReferenceFrame(); break; default: NS_NOTREACHED("Unknown clip type"); return result; } } return clipRect.Intersect(aRect); } 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 nsStyleImageLayers::Layer& layer = mBackgroundStyle->mLayers.mLayers[mLayer]; if (layer.mImage.IsOpaque() && layer.mBlendMode == NS_STYLE_BLEND_NORMAL) { result = GetInsideClipRegion(this, layer.mClip, mBounds); } } return result; } bool nsDisplayBackgroundImage::IsUniform(nsDisplayListBuilder* aBuilder, nscolor* aColor) { if (!mBackgroundStyle) { *aColor = NS_RGBA(0,0,0,0); return true; } return false; } nsRect nsDisplayBackgroundImage::GetPositioningArea() { if (!mBackgroundStyle) { return nsRect(); } nsIFrame* attachedToFrame; return nsCSSRendering::ComputeImageLayerPositioningArea( mFrame->PresContext(), mFrame, nsRect(ToReferenceFrame(), mFrame->GetSize()), mBackgroundStyle->mLayers.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 nsStyleImageLayers::Layer &layer = mBackgroundStyle->mLayers.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, &mBounds); } void nsDisplayBackgroundImage::PaintInternal(nsDisplayListBuilder* aBuilder, nsRenderingContext* aCtx, const nsRect& aBounds, nsRect* aClipRect) { nsPoint offset = ToReferenceFrame(); uint32_t flags = aBuilder->GetBackgroundPaintFlags(); CheckForBorderItem(this, flags); image::DrawResult result = nsCSSRendering::PaintBackground(mFrame->PresContext(), *aCtx, mFrame, aBounds, nsRect(offset, mFrame->GetSize()), flags, aClipRect, mLayer); nsDisplayBackgroundGeometry::UpdateDrawResult(this, result); } 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 (!mDestArea.IsEqualInterior(geometry->mDestArea)) { // Dest 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); NotifyRenderingChanged(); return; } if (aBuilder->ShouldSyncDecodeImages()) { const nsStyleImage& image = mBackgroundStyle->mLayers.mLayers[mLayer].mImage; if (image.GetType() == eStyleImageType_Image && geometry->ShouldInvalidateToSyncDecodeImages()) { 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(); } else if (nsLayoutUtils::UsesAsyncScrolling(mFrame) && IsNonEmptyFixedImage()) { // If this is a background-attachment:fixed image, and APZ is enabled, // async scrolling could reveal additional areas of the image, so don't // clip it beyond clipping to the document's viewport. nsIFrame* rootFrame = presContext->PresShell()->GetRootFrame(); nsRect rootRect = rootFrame->GetRectRelativeToSelf(); if (nsLayoutUtils::TransformRect(rootFrame, mFrame, rootRect) == nsLayoutUtils::TRANSFORM_SUCCEEDED) { clipRect = clipRect.Union(rootRect + aBuilder->ToReferenceFrame(mFrame)); } } const nsStyleImageLayers::Layer& layer = mBackgroundStyle->mLayers.mLayers[mLayer]; return nsCSSRendering::GetBackgroundLayerRect(presContext, mFrame, borderBox, clipRect, layer, aBuilder->GetBackgroundPaintFlags()); } uint32_t nsDisplayBackgroundImage::GetPerFrameKey() { return (mLayer << nsDisplayItem::TYPE_BITS) | nsDisplayItem::GetPerFrameKey(); } void nsDisplayBackgroundImage::MarkBoundsAsVisible(nsDisplayListBuilder* aBuilder) { bool snap; mVisibleRect = GetBounds(aBuilder, &snap); } 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 nsITheme* theme = mFrame->PresContext()->GetTheme(); nsITheme::ThemeGeometryType type = theme->ThemeGeometryTypeForWidget(mFrame, disp->mAppearance); if (type != nsITheme::eThemeGeometryTypeUnknown) { RegisterThemeGeometry(aBuilder, aFrame, type); } if (disp->mAppearance == NS_THEME_WIN_BORDERLESS_GLASS || disp->mAppearance == NS_THEME_WIN_GLASS) { aBuilder->SetGlassDisplayItem(this); } mBounds = GetBoundsInternal(); } nsDisplayThemedBackground::~nsDisplayThemedBackground() { #ifdef NS_BUILD_REFCNT_LOGGING MOZ_COUNT_DTOR(nsDisplayThemedBackground); #endif } void nsDisplayThemedBackground::WriteDebugInfo(std::stringstream& aStream) { aStream << " (themed, appearance:" << (int)mAppearance << ")"; } 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; } bool nsDisplayThemedBackground::ProvidesFontSmoothingBackgroundColor(nscolor* aColor) { nsITheme* theme = mFrame->PresContext()->GetTheme(); return theme->WidgetProvidesFontSmoothingBackgroundColor(mFrame, mAppearance, aColor); } 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); return r + ToReferenceFrame(); } void nsDisplayBackgroundColor::ApplyOpacity(nsDisplayListBuilder* aBuilder, float aOpacity, const DisplayItemClip* aClip) { NS_ASSERTION(CanApplyOpacity(), "ApplyOpacity should be allowed"); mColor.a = mColor.a * aOpacity; if (aClip) { IntersectClip(aBuilder, *aClip); } } bool nsDisplayBackgroundColor::CanApplyOpacity() const { return true; } void nsDisplayBackgroundColor::Paint(nsDisplayListBuilder* aBuilder, nsRenderingContext* aCtx) { if (mColor == Color()) { return; } nsRect borderBox = nsRect(ToReferenceFrame(), mFrame->GetSize()); #if 0 // See https://bugzilla.mozilla.org/show_bug.cgi?id=1148418#c21 for why this // results in a precision induced rounding issue that makes the rect one // pixel shorter in rare cases. Disabled in favor of the old code for now. // Note that the pref layout.css.devPixelsPerPx needs to be set to 1 to // reproduce the bug. DrawTarget& aDrawTarget = *aCtx->GetDrawTarget(); Rect rect = NSRectToSnappedRect(borderBox, mFrame->PresContext()->AppUnitsPerDevPixel(), aDrawTarget); ColorPattern color(ToDeviceColor(mColor)); aDrawTarget.FillRect(rect, color); #else gfxContext* ctx = aCtx->ThebesContext(); gfxRect bounds = nsLayoutUtils::RectToGfxRect(borderBox, mFrame->PresContext()->AppUnitsPerDevPixel()); ctx->SetColor(mColor); ctx->NewPath(); ctx->Rectangle(bounds, true); ctx->Fill(); #endif } nsRegion nsDisplayBackgroundColor::GetOpaqueRegion(nsDisplayListBuilder* aBuilder, bool* aSnap) { *aSnap = false; if (mColor.a != 1) { return nsRegion(); } if (!mBackgroundStyle) return nsRegion(); *aSnap = true; const nsStyleImageLayers::Layer& bottomLayer = mBackgroundStyle->BottomLayer(); nsRect borderBox = nsRect(ToReferenceFrame(), mFrame->GetSize()); return nsDisplayBackgroundImage::GetInsideClipRegion(this, bottomLayer.mClip, borderBox); } bool nsDisplayBackgroundColor::IsUniform(nsDisplayListBuilder* aBuilder, nscolor* aColor) { *aColor = mColor.ToABGR(); return true; } 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); } void nsDisplayBackgroundColor::WriteDebugInfo(std::stringstream& aStream) { aStream << " (rgba " << mColor.r << "," << mColor.g << "," << mColor.b << "," << mColor.a << ")"; } already_AddRefed nsDisplayClearBackground::BuildLayer(nsDisplayListBuilder* aBuilder, LayerManager* aManager, const ContainerLayerParameters& aParameters) { RefPtr layer = static_cast (aManager->GetLayerBuilder()->GetLeafLayerFor(aBuilder, this)); if (!layer) { layer = aManager->CreateColorLayer(); if (!layer) return nullptr; } layer->SetColor(Color()); layer->SetMixBlendMode(gfx::CompositionOp::OP_SOURCE); bool snap; nsRect bounds = GetBounds(aBuilder, &snap); int32_t appUnitsPerDevPixel = mFrame->PresContext()->AppUnitsPerDevPixel(); layer->SetBounds(bounds.ToNearestPixels(appUnitsPerDevPixel)); // XXX Do we need to respect the parent layer's scale here? return layer.forget(); } 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"); if (aBuilder->IsInsidePointerEventsNoneDoc()) { // Somewhere up the parent document chain is a subdocument with pointer- // events:none set on it (and without a mozpasspointerevents). return; } if (!aFrame->GetParent()) { MOZ_ASSERT(aFrame->GetType() == nsGkAtoms::viewportFrame); // Viewport frames are never event targets, other frames, like canvas frames, // are the event targets for any regions viewport frames may cover. return; } uint8_t pointerEvents = aFrame->StyleVisibility()->GetEffectivePointerEvents(aFrame); if (pointerEvents == NS_STYLE_POINTER_EVENTS_NONE) { return; } if (!aFrame->StyleVisibility()->IsVisible()) { 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; if (nsLayoutUtils::GetScrollableFrameFor(aFrame)) { // If the frame is content of a scrollframe, then we need to pick up the // area corresponding to the overflow rect as well. Otherwise the parts of // the overflow that are not occupied by descendants get skipped and the // APZ code sends touch events to the content underneath instead. // See https://bugzilla.mozilla.org/show_bug.cgi?id=1127773#c15. borderBox = aFrame->GetScrollableOverflowRect(); } else { borderBox = nsRect(nsPoint(0, 0), aFrame->GetSize()); } borderBox += aBuilder->ToReferenceFrame(aFrame); 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->IsBuildingNonLayerizedScrollbar() || aBuilder->GetAncestorHasApzAwareEventHandler()) { // Scrollbars may be painted into a layer below the actual layer they will // scroll, and therefore wheel events may be dispatched to the outer frame // instead of the intended scrollframe. To address this, we force a d-t-c // region on scrollbar frames that won't be placed in their own layer. See // bug 1213324 for details. mDispatchToContentHitRegion.Or(mDispatchToContentHitRegion, borderBox); } else if (aFrame->GetType() == nsGkAtoms::objectFrame) { // If the frame is a plugin frame and wants to handle wheel events as // default action, we should add the frame to dispatch-to-content region. nsPluginFrame* pluginFrame = do_QueryFrame(aFrame); if (pluginFrame && pluginFrame->WantsToHandleWheelEventAsDefaultAction()) { mDispatchToContentHitRegion.Or(mDispatchToContentHitRegion, borderBox); } } else if (gfxPlatform::GetPlatform()->SupportsApzWheelInput() && nsLayoutUtils::IsScrollFrameWithSnapping(aFrame->GetParent())) { // If the frame is the inner content of a scrollable frame with snap-points // then we want to handle wheel events for it on the main thread. Add it to // the d-t-c region so that APZ waits for the main thread. mDispatchToContentHitRegion.Or(mDispatchToContentHitRegion, borderBox); } // Touch action region uint32_t touchAction = nsLayoutUtils::GetTouchActionFromFrame(aFrame); if (touchAction & NS_STYLE_TOUCH_ACTION_NONE) { mNoActionRegion.Or(mNoActionRegion, borderBox); } else { if ((touchAction & NS_STYLE_TOUCH_ACTION_PAN_X)) { mHorizontalPanRegion.Or(mHorizontalPanRegion, borderBox); } if ((touchAction & NS_STYLE_TOUCH_ACTION_PAN_Y)) { mVerticalPanRegion.Or(mVerticalPanRegion, borderBox); } } } void nsDisplayLayerEventRegions::AddInactiveScrollPort(const nsRect& aRect) { mHitRegion.Or(mHitRegion, aRect); mDispatchToContentHitRegion.Or(mDispatchToContentHitRegion, aRect); } void nsDisplayLayerEventRegions::WriteDebugInfo(std::stringstream& aStream) { if (!mHitRegion.IsEmpty()) { AppendToString(aStream, mHitRegion, " (hitRegion ", ")"); } if (!mMaybeHitRegion.IsEmpty()) { AppendToString(aStream, mMaybeHitRegion, " (maybeHitRegion ", ")"); } if (!mDispatchToContentHitRegion.IsEmpty()) { AppendToString(aStream, mDispatchToContentHitRegion, " (dispatchToContentRegion ", ")"); } } nsDisplayCaret::nsDisplayCaret(nsDisplayListBuilder* aBuilder, nsIFrame* aCaretFrame) : nsDisplayItem(aBuilder, aCaretFrame) , mCaret(aBuilder->GetCaret()) , mBounds(aBuilder->GetCaretRect() + ToReferenceFrame()) { MOZ_COUNT_CTOR(nsDisplayCaret); } #ifdef NS_BUILD_REFCNT_LOGGING nsDisplayCaret::~nsDisplayCaret() { MOZ_COUNT_DTOR(nsDisplayCaret); } #endif nsRect nsDisplayCaret::GetBounds(nsDisplayListBuilder* aBuilder, bool* aSnap) { *aSnap = true; // The caret returns a rect in the coordinates of mFrame. return mBounds; } 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(*aCtx->GetDrawTarget(), mFrame, ToReferenceFrame()); } nsDisplayBorder::nsDisplayBorder(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame) : nsDisplayItem(aBuilder, aFrame) { MOZ_COUNT_CTOR(nsDisplayBorder); mBounds = CalculateBounds(*mFrame->StyleBorder()); } 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); } if (aBuilder->ShouldSyncDecodeImages() && geometry->ShouldInvalidateToSyncDecodeImages()) { aInvalidRegion->Or(*aInvalidRegion, GetBounds(aBuilder, &snap)); } } void nsDisplayBorder::Paint(nsDisplayListBuilder* aBuilder, nsRenderingContext* aCtx) { nsPoint offset = ToReferenceFrame(); PaintBorderFlags flags = aBuilder->ShouldSyncDecodeImages() ? PaintBorderFlags::SYNC_DECODE_IMAGES : PaintBorderFlags(); image::DrawResult result = nsCSSRendering::PaintBorder(mFrame->PresContext(), *aCtx, mFrame, mVisibleRect, nsRect(offset, mFrame->GetSize()), mFrame->StyleContext(), flags, mFrame->GetSkipSides()); nsDisplayBorderGeometry::UpdateDrawResult(this, result); } nsRect nsDisplayBorder::GetBounds(nsDisplayListBuilder* aBuilder, bool* aSnap) { *aSnap = true; return mBounds; } 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())); } nscoord radii[8]; if (mFrame->GetBorderRadii(radii)) { if (border.left > 0 || border.top > 0) { nsSize cornerSize(radii[NS_CORNER_TOP_LEFT_X], radii[NS_CORNER_TOP_LEFT_Y]); result.UnionRect(result, nsRect(borderBounds.TopLeft(), cornerSize)); } if (border.top > 0 || border.right > 0) { nsSize cornerSize(radii[NS_CORNER_TOP_RIGHT_X], radii[NS_CORNER_TOP_RIGHT_Y]); result.UnionRect(result, nsRect(borderBounds.TopRight() - nsPoint(cornerSize.width, 0), cornerSize)); } if (border.right > 0 || border.bottom > 0) { nsSize cornerSize(radii[NS_CORNER_BOTTOM_RIGHT_X], radii[NS_CORNER_BOTTOM_RIGHT_Y]); result.UnionRect(result, nsRect(borderBounds.BottomRight() - nsPoint(cornerSize.width, cornerSize.height), cornerSize)); } if (border.bottom > 0 || border.left > 0) { nsSize cornerSize(radii[NS_CORNER_BOTTOM_LEFT_X], radii[NS_CORNER_BOTTOM_LEFT_Y]); result.UnionRect(result, nsRect(borderBounds.BottomLeft() - nsPoint(0, cornerSize.height), cornerSize)); } } 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; for (auto iter = aRegion.RectIter(); !iter.Done(); iter.Next()) { const nsRect& r = iter.Get(); if (accumulated.IsEmpty()) { accumulated = r; continue; } if (accumulated.YMost() >= r.y - accumulationMargin) { accumulated.UnionRect(accumulated, r); } else { aRects->AppendElement(accumulated); accumulated = r; } } // Finish the in-flight rectangle, if there is one. if (!accumulated.IsEmpty()) { aRects->AppendElement(accumulated); } } 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) { if (!nsDisplayItem::ComputeVisibility(aBuilder, aVisibleRegion)) { return false; } // Store the actual visible region mVisibleRegion.And(*aVisibleRegion, mVisibleRect); return true; } void nsDisplayBoxShadowOuter::ComputeInvalidationRegion(nsDisplayListBuilder* aBuilder, const nsDisplayItemGeometry* aGeometry, nsRegion* aInvalidRegion) { const nsDisplayBoxShadowOuterGeometry* geometry = static_cast(aGeometry); bool snap; if (!geometry->mBounds.IsEqualInterior(GetBounds(aBuilder, &snap)) || !geometry->mBorderRect.IsEqualInterior(GetBorderRect()) || mOpacity != geometry->mOpacity) { 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.Sub(geometry->mBounds, geometry->mBorderRect); 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); DrawTarget* drawTarget = aCtx->GetDrawTarget(); gfxContext* gfx = aCtx->ThebesContext(); int32_t appUnitsPerDevPixel = mFrame->PresContext()->AppUnitsPerDevPixel(); for (uint32_t i = 0; i < rects.Length(); ++i) { gfx->Save(); gfx->Clip(NSRectToSnappedRect(rects[i], appUnitsPerDevPixel, *drawTarget)); nsCSSRendering::PaintBoxShadowInner(presContext, *aCtx, mFrame, borderRect); gfx->Restore(); } } bool nsDisplayBoxShadowInner::ComputeVisibility(nsDisplayListBuilder* aBuilder, nsRegion* aVisibleRegion) { if (!nsDisplayItem::ComputeVisibility(aBuilder, aVisibleRegion)) { 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) , mHasZIndexOverride(false) { MOZ_COUNT_CTOR(nsDisplayWrapList); mBaseVisibleRect = mVisibleRect; mList.AppendToTop(aList); UpdateBounds(aBuilder); if (!aFrame || !aFrame->IsTransformed()) { 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). nsDisplayItem *i = mList.GetBottom(); if (i && (!i->GetAbove() || i->GetType() == TYPE_TRANSFORM) && i->Frame() == mFrame) { mReferenceFrame = i->ReferenceFrame(); mToReferenceFrame = i->ToReferenceFrame(); } mVisibleRect = aBuilder->GetDirtyRect() + aBuilder->GetCurrentFrameOffsetToReferenceFrame(); } nsDisplayWrapList::nsDisplayWrapList(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame, nsDisplayItem* aItem) : nsDisplayItem(aBuilder, aFrame) , mOverrideZIndex(0) , mHasZIndexOverride(false) { MOZ_COUNT_CTOR(nsDisplayWrapList); mBaseVisibleRect = mVisibleRect; mList.AppendToTop(aItem); UpdateBounds(aBuilder); if (!aFrame || !aFrame->IsTransformed()) { return; } // See the previous nsDisplayWrapList constructor if (aItem->Frame() == aFrame) { mReferenceFrame = aItem->ReferenceFrame(); mToReferenceFrame = aItem->ToReferenceFrame(); } mVisibleRect = aBuilder->GetDirtyRect() + aBuilder->GetCurrentFrameOffsetToReferenceFrame(); } nsDisplayWrapList::~nsDisplayWrapList() { mList.DeleteAll(); MOZ_COUNT_DTOR(nsDisplayWrapList); } 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) { // 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); 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; } 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 * PaintedLayer --- 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, AnimatedGeometryRoot* aExpectedAnimatedGeometryRootForChildren) { LayerState result = LAYER_INACTIVE; for (nsDisplayItem* i = aList.GetBottom(); i; i = i->GetAbove()) { if (result == LAYER_INACTIVE && i->GetAnimatedGeometryRoot() != 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; } void nsDisplayWrapList::SetVisibleRect(const nsRect& aRect) { mVisibleRect = aRect; } void nsDisplayWrapList::SetReferenceFrame(const nsIFrame* aFrame) { mReferenceFrame = aFrame; mToReferenceFrame = mFrame->GetOffsetToCrossDoc(mReferenceFrame); } 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, const DisplayItemScrollClip* aScrollClipForSameAGRChildren, bool aForEventsOnly) : nsDisplayWrapList(aBuilder, aFrame, aList) , mScrollClipForSameAGRChildren(aScrollClipForSameAGRChildren) , mOpacity(aFrame->StyleDisplay()->mOpacity) , mForEventsOnly(aForEventsOnly) { 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; // The only time where mOpacity == 1.0 should be when we have will-change. // We could report this as opaque then but when the will-change value starts // animating the element would become non opaque and could cause repaints. return nsRegion(); } // nsDisplayOpacity uses layers for rendering already_AddRefed nsDisplayOpacity::BuildLayer(nsDisplayListBuilder* aBuilder, LayerManager* aManager, const ContainerLayerParameters& aContainerParameters) { ContainerLayerParameters params = aContainerParameters; params.mForEventsOnly = mForEventsOnly; RefPtr container = aManager->GetLayerBuilder()-> BuildContainerLayerFor(aBuilder, aManager, mFrame, this, &mList, params, nullptr, FrameLayerBuilder::CONTAINER_ALLOW_PULL_BACKGROUND_COLOR); if (!container) return nullptr; container->SetOpacity(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(nsDisplayListBuilder* aBuilder) { if (ActiveLayerTracker::IsStyleAnimated(aBuilder, mFrame, eCSSProperty_opacity) && !IsItemTooSmallForActiveLayer(this)) return true; if (EffectCompositor::HasAnimationsForCompositor(mFrame, eCSSProperty_opacity)) { return true; } return false; } void nsDisplayOpacity::ApplyOpacity(nsDisplayListBuilder* aBuilder, float aOpacity, const DisplayItemClip* aClip) { NS_ASSERTION(CanApplyOpacity(), "ApplyOpacity should be allowed"); mOpacity = mOpacity * aOpacity; if (aClip) { IntersectClip(aBuilder, *aClip); } } bool nsDisplayOpacity::CanApplyOpacity() const { return true; } bool nsDisplayOpacity::ShouldFlattenAway(nsDisplayListBuilder* aBuilder) { if (NeedsActiveLayer(aBuilder) || mOpacity == 0.0) { // If our opacity is zero then we'll discard all descendant display items // except for layer event regions, so there's no point in doing this // optimization (and if we do do it, then invalidations of those descendants // might trigger repainting). return false; } nsDisplayItem* child = mList.GetBottom(); // Only try folding our opacity down if we have at most three children // that don't overlap and can all apply the opacity to themselves. if (!child) { return false; } struct { nsDisplayItem* item; nsRect bounds; } children[3]; bool snap; uint32_t numChildren = 0; for (; numChildren < ArrayLength(children) && child; numChildren++, child = child->GetAbove()) { if (child->GetType() == nsDisplayItem::TYPE_LAYER_EVENT_REGIONS) { numChildren--; continue; } if (!child->CanApplyOpacity()) { return false; } children[numChildren].item = child; children[numChildren].bounds = child->GetBounds(aBuilder, &snap); } if (child) { // we have a fourth (or more) child return false; } for (uint32_t i = 0; i < numChildren; i++) { for (uint32_t j = i+1; j < numChildren; j++) { if (children[i].bounds.Intersects(children[j].bounds)) { return false; } } } for (uint32_t i = 0; i < numChildren; i++) { children[i].item->ApplyOpacity(aBuilder, mOpacity, mClip); } return true; } nsDisplayItem::LayerState nsDisplayOpacity::GetLayerState(nsDisplayListBuilder* aBuilder, LayerManager* aManager, const ContainerLayerParameters& aParameters) { // If we only created this item so that we'd get correct nsDisplayEventRegions for child // frames, then force us to inactive to avoid unnecessary layerization changes for content // that won't ever be painted. if (mForEventsOnly) { MOZ_ASSERT(mOpacity == 0); return LAYER_INACTIVE; } if (NeedsActiveLayer(aBuilder)) return LAYER_ACTIVE; return RequiredLayerStateForChildren(aBuilder, aManager, aParameters, mList, GetAnimatedGeometryRoot()); } bool nsDisplayOpacity::ComputeVisibility(nsDisplayListBuilder* aBuilder, nsRegion* aVisibleRegion) { // 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); return nsDisplayWrapList::ComputeVisibility(aBuilder, &visibleUnderChildren); } bool nsDisplayOpacity::TryMerge(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; if (aItem->ScrollClip() != ScrollClip()) return false; MergeFromTrackingMergedFrames(static_cast(aItem)); return true; } void nsDisplayOpacity::WriteDebugInfo(std::stringstream& aStream) { aStream << " (opacity " << mOpacity << ")"; } nsDisplayMixBlendMode::nsDisplayMixBlendMode(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame, nsDisplayList* aList) : 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) { CompositionOp op = nsCSSRendering::GetGFXBlendMode(mFrame->StyleDisplay()->mMixBlendMode); return aManager->SupportsMixBlendMode(op) ? LAYER_ACTIVE : LAYER_INACTIVE; } // nsDisplayMixBlendMode uses layers for rendering already_AddRefed nsDisplayMixBlendMode::BuildLayer(nsDisplayListBuilder* aBuilder, LayerManager* aManager, const ContainerLayerParameters& aContainerParameters) { ContainerLayerParameters newContainerParameters = aContainerParameters; newContainerParameters.mDisableSubpixelAntialiasingInDescendants = true; RefPtr container = aManager->GetLayerBuilder()-> BuildContainerLayerFor(aBuilder, aManager, mFrame, this, &mList, newContainerParameters, nullptr); if (!container) { return nullptr; } container->SetMixBlendMode(nsCSSRendering::GetGFXBlendMode(mFrame->StyleDisplay()->mMixBlendMode)); return container.forget(); } bool nsDisplayMixBlendMode::ComputeVisibility(nsDisplayListBuilder* aBuilder, nsRegion* aVisibleRegion) { // 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); return nsDisplayWrapList::ComputeVisibility(aBuilder, &visibleUnderChildren); } bool nsDisplayMixBlendMode::TryMerge(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; if (aItem->ScrollClip() != ScrollClip()) return false; MergeFromTrackingMergedFrames(static_cast(aItem)); return true; } nsDisplayBlendContainer::nsDisplayBlendContainer(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame, nsDisplayList* aList, BlendModeSet& aContainedBlendModes) : nsDisplayWrapList(aBuilder, aFrame, aList) , mIndex(0) , mContainedBlendModes(aContainedBlendModes) , mCanBeActive(true) { MOZ_COUNT_CTOR(nsDisplayBlendContainer); } nsDisplayBlendContainer::nsDisplayBlendContainer(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame, nsDisplayList* aList) : nsDisplayWrapList(aBuilder, aFrame, aList) , mIndex(1) , 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; RefPtr container = aManager->GetLayerBuilder()-> BuildContainerLayerFor(aBuilder, aManager, mFrame, this, &mList, newContainerParameters, nullptr); if (!container) { return nullptr; } container->SetForceIsolatedGroup(true); return container.forget(); } LayerState nsDisplayBlendContainer::GetLayerState(nsDisplayListBuilder* aBuilder, LayerManager* aManager, const ContainerLayerParameters& aParameters) { if (mCanBeActive && aManager->SupportsMixBlendModes(mContainedBlendModes)) { return mozilla::LAYER_ACTIVE; } return mozilla::LAYER_INACTIVE; } bool nsDisplayBlendContainer::TryMerge(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; if (aItem->ScrollClip() != ScrollClip()) return false; MergeFromTrackingMergedFrames(static_cast(aItem)); return true; } nsDisplayOwnLayer::nsDisplayOwnLayer(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame, nsDisplayList* aList, uint32_t aFlags, ViewID aScrollTarget, float aScrollbarThumbRatio) : nsDisplayWrapList(aBuilder, aFrame, aList) , mFlags(aFlags) , mScrollTarget(aScrollTarget) , mScrollbarThumbRatio(aScrollbarThumbRatio) { 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) { RefPtr layer = aManager->GetLayerBuilder()-> BuildContainerLayerFor(aBuilder, aManager, mFrame, this, &mList, aContainerParameters, nullptr, FrameLayerBuilder::CONTAINER_ALLOW_PULL_BACKGROUND_COLOR); if (mFlags & VERTICAL_SCROLLBAR) { layer->SetScrollbarData(mScrollTarget, Layer::ScrollDirection::VERTICAL, mScrollbarThumbRatio); } if (mFlags & HORIZONTAL_SCROLLBAR) { layer->SetScrollbarData(mScrollTarget, Layer::ScrollDirection::HORIZONTAL, mScrollbarThumbRatio); } if (mFlags & SCROLLBAR_CONTAINER) { layer->SetIsScrollbarContainer(); } 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); mForceDispatchToContentRegion = aBuilder->IsBuildingLayerEventRegions() && nsLayoutUtils::HasDocumentLevelListenersForApzAwareEvents(aFrame->PresContext()->PresShell()); } #ifdef NS_BUILD_REFCNT_LOGGING nsDisplaySubDocument::~nsDisplaySubDocument() { MOZ_COUNT_DTOR(nsDisplaySubDocument); } #endif already_AddRefed nsDisplaySubDocument::BuildLayer(nsDisplayListBuilder* aBuilder, LayerManager* aManager, const ContainerLayerParameters& aContainerParameters) { nsPresContext* presContext = mFrame->PresContext(); nsIFrame* rootScrollFrame = presContext->PresShell()->GetRootScrollFrame(); ContainerLayerParameters params = aContainerParameters; if ((mFlags & GENERATE_SCROLLABLE_LAYER) && rootScrollFrame->GetContent() && nsLayoutUtils::HasCriticalDisplayPort(rootScrollFrame->GetContent())) { params.mInLowPrecisionDisplayPort = true; } RefPtr layer = nsDisplayOwnLayer::BuildLayer(aBuilder, aManager, params); layer->AsContainerLayer()->SetEventRegionsOverride(mForceDispatchToContentRegion ? EventRegionsOverride::ForceDispatchToContent : EventRegionsOverride::NoOverride); return layer.forget(); } UniquePtr nsDisplaySubDocument::ComputeFrameMetrics(Layer* aLayer, const ContainerLayerParameters& aContainerParameters) { if (!(mFlags & GENERATE_SCROLLABLE_LAYER)) { return UniquePtr(nullptr); } nsPresContext* presContext = mFrame->PresContext(); nsIFrame* rootScrollFrame = presContext->PresShell()->GetRootScrollFrame(); bool isRootContentDocument = presContext->IsRootContentDocument(); nsIPresShell* presShell = presContext->PresShell(); ContainerLayerParameters params( aContainerParameters.mXScale * presShell->GetResolution(), aContainerParameters.mYScale * presShell->GetResolution(), nsIntPoint(), aContainerParameters); if ((mFlags & GENERATE_SCROLLABLE_LAYER) && rootScrollFrame->GetContent() && nsLayoutUtils::HasCriticalDisplayPort(rootScrollFrame->GetContent())) { params.mInLowPrecisionDisplayPort = true; } nsRect viewport = mFrame->GetRect() - mFrame->GetPosition() + mFrame->GetOffsetToCrossDoc(ReferenceFrame()); return MakeUnique( nsLayoutUtils::ComputeFrameMetrics( mFrame, rootScrollFrame, rootScrollFrame->GetContent(), ReferenceFrame(), aLayer, mScrollParentId, viewport, Nothing(), isRootContentDocument, params)); } static bool UseDisplayPortForViewport(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame) { return aBuilder->IsPaintingToWindow() && nsLayoutUtils::ViewportHasDisplayPort(aFrame->PresContext()); } nsRect nsDisplaySubDocument::GetBounds(nsDisplayListBuilder* aBuilder, bool* aSnap) { bool usingDisplayPort = UseDisplayPortForViewport(aBuilder, mFrame); 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) { bool usingDisplayPort = UseDisplayPortForViewport(aBuilder, mFrame); if (!(mFlags & GENERATE_SCROLLABLE_LAYER) || !usingDisplayPort) { return nsDisplayWrapList::ComputeVisibility(aBuilder, aVisibleRegion); } nsRect displayport; nsIFrame* rootScrollFrame = mFrame->PresContext()->PresShell()->GetRootScrollFrame(); MOZ_ASSERT(rootScrollFrame); Unused << nsLayoutUtils::GetDisplayPort(rootScrollFrame->GetContent(), &displayport, RelativeTo::ScrollFrame); 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)); bool visible = mList.ComputeVisibilityForSublist( aBuilder, &childVisibleRegion, boundedRect); // If APZ is enabled then 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. if (!nsLayoutUtils::UsesAsyncScrolling(mFrame)) { bool snap; nsRect bounds = GetBounds(aBuilder, &snap); nsRegion removed; removed.Sub(bounds, childVisibleRegion); aBuilder->SubtractFromVisibleRegion(aVisibleRegion, removed); } return visible; } bool nsDisplaySubDocument::ShouldBuildLayerEvenIfInvisible(nsDisplayListBuilder* aBuilder) { bool usingDisplayPort = UseDisplayPortForViewport(aBuilder, mFrame); if ((mFlags & GENERATE_SCROLLABLE_LAYER) && usingDisplayPort) { return true; } return nsDisplayOwnLayer::ShouldBuildLayerEvenIfInvisible(aBuilder); } nsRegion nsDisplaySubDocument::GetOpaqueRegion(nsDisplayListBuilder* aBuilder, bool* aSnap) { bool usingDisplayPort = UseDisplayPortForViewport(aBuilder, mFrame); 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 void nsDisplayResolution::HitTest(nsDisplayListBuilder* aBuilder, const nsRect& aRect, HitTestState* aState, nsTArray *aOutFrames) { nsIPresShell* presShell = mFrame->PresContext()->PresShell(); nsRect rect = aRect.RemoveResolution(presShell->ScaleToResolution() ? presShell->GetResolution () : 1.0f); mList.HitTest(aBuilder, rect, aState, aOutFrames); } already_AddRefed nsDisplayResolution::BuildLayer(nsDisplayListBuilder* aBuilder, LayerManager* aManager, const ContainerLayerParameters& aContainerParameters) { nsIPresShell* presShell = mFrame->PresContext()->PresShell(); ContainerLayerParameters containerParameters( presShell->GetResolution(), presShell->GetResolution(), nsIntPoint(), aContainerParameters); RefPtr layer = nsDisplaySubDocument::BuildLayer( aBuilder, aManager, containerParameters); layer->SetPostScale(1.0f / presShell->GetResolution(), 1.0f / presShell->GetResolution()); layer->AsContainerLayer()->SetScaleToResolution( presShell->ScaleToResolution(), presShell->GetResolution()); return layer.forget(); } nsDisplayFixedPosition::nsDisplayFixedPosition(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame, nsDisplayList* aList) : nsDisplayOwnLayer(aBuilder, aFrame, aList) , mIndex(0) , mIsFixedBackground(false) { MOZ_COUNT_CTOR(nsDisplayFixedPosition); Init(aBuilder); } nsDisplayFixedPosition::nsDisplayFixedPosition(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame, nsDisplayList* aList, uint32_t aIndex) : nsDisplayOwnLayer(aBuilder, aFrame, aList) , mIndex(aIndex) , mIsFixedBackground(true) { MOZ_COUNT_CTOR(nsDisplayFixedPosition); Init(aBuilder); } void nsDisplayFixedPosition::Init(nsDisplayListBuilder* aBuilder) { bool snap; mVisibleRect = GetBounds(aBuilder, &snap); mAnimatedGeometryRootForScrollMetadata = mAnimatedGeometryRoot; if (ShouldFixToViewport(aBuilder)) { mAnimatedGeometryRoot = aBuilder->FindAnimatedGeometryRootFor(this); } } /* static */ nsDisplayFixedPosition* nsDisplayFixedPosition::CreateForFixedBackground(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame, nsDisplayBackgroundImage* aImage, uint32_t aIndex) { // Clear clipping on the child item, since we will apply it to the // fixed position item as well. aImage->SetClip(aBuilder, DisplayItemClip()); aImage->SetScrollClip(nullptr); aImage->MarkBoundsAsVisible(aBuilder); nsDisplayList temp; temp.AppendToTop(aImage); return new (aBuilder) nsDisplayFixedPosition(aBuilder, aFrame, &temp, aIndex + 1); } #ifdef NS_BUILD_REFCNT_LOGGING nsDisplayFixedPosition::~nsDisplayFixedPosition() { MOZ_COUNT_DTOR(nsDisplayFixedPosition); } #endif already_AddRefed nsDisplayFixedPosition::BuildLayer(nsDisplayListBuilder* aBuilder, LayerManager* aManager, const ContainerLayerParameters& aContainerParameters) { RefPtr layer = nsDisplayOwnLayer::BuildLayer(aBuilder, aManager, aContainerParameters); layer->SetIsFixedPosition(true); nsPresContext* presContext = Frame()->PresContext(); nsIFrame* fixedFrame = mIsFixedBackground ? presContext->PresShell()->GetRootFrame() : Frame(); const nsIFrame* viewportFrame = fixedFrame->GetParent(); // anchorRect will be in the container's coordinate system (aLayer's parent layer). // This is the same as the display items' reference frame. nsRect anchorRect; if (viewportFrame) { // Fixed position frames are reflowed into the scroll-port size if one has // been set. if (presContext->PresShell()->IsScrollPositionClampingScrollPortSizeSet()) { anchorRect.SizeTo(presContext->PresShell()->GetScrollPositionClampingScrollPortSize()); } else { anchorRect.SizeTo(viewportFrame->GetSize()); } } else { // A display item directly attached to the viewport. // For background-attachment:fixed items, the anchor point is always the // top-left of the viewport currently. viewportFrame = fixedFrame; } // The anchorRect top-left is always the viewport top-left. anchorRect.MoveTo(viewportFrame->GetOffsetToCrossDoc(ReferenceFrame())); nsLayoutUtils::SetFixedPositionLayerData(layer, viewportFrame, anchorRect, fixedFrame, presContext, aContainerParameters, !mIsFixedBackground); return layer.forget(); } bool nsDisplayFixedPosition::TryMerge(nsDisplayItem* aItem) { if (aItem->GetType() != TYPE_FIXED_POSITION) return false; // Items with the same fixed position frame can be merged. nsDisplayFixedPosition* other = static_cast(aItem); if (other->mFrame != mFrame) return false; if (aItem->GetClip() != GetClip()) return false; MergeFromTrackingMergedFrames(other); return true; } 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) { RefPtr 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, /* clip is fixed = */ true); 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(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; if (aItem->ScrollClip() != ScrollClip()) return false; MergeFromTrackingMergedFrames(other); return true; } nsDisplayScrollInfoLayer::nsDisplayScrollInfoLayer( nsDisplayListBuilder* aBuilder, nsIFrame* aScrolledFrame, nsIFrame* aScrollFrame) : nsDisplayWrapList(aBuilder, aScrollFrame) , mScrollFrame(aScrollFrame) , mScrolledFrame(aScrolledFrame) , mScrollParentId(aBuilder->GetCurrentScrollParentId()) , mIgnoreIfCompositorSupportsBlending(false) { #ifdef NS_BUILD_REFCNT_LOGGING MOZ_COUNT_CTOR(nsDisplayScrollInfoLayer); #endif } #ifdef NS_BUILD_REFCNT_LOGGING nsDisplayScrollInfoLayer::~nsDisplayScrollInfoLayer() { MOZ_COUNT_DTOR(nsDisplayScrollInfoLayer); } #endif already_AddRefed nsDisplayScrollInfoLayer::BuildLayer(nsDisplayListBuilder* aBuilder, LayerManager* aManager, const ContainerLayerParameters& aContainerParameters) { // In general for APZ with event-regions we no longer have a need for // scrollinfo layers. However, in some cases, there might be content that // cannot be layerized, and so needs to scroll synchronously. To handle those // cases, we still want to generate scrollinfo layers. if (mIgnoreIfCompositorSupportsBlending) { // This item was created pessimistically because, during display list // building, we encountered a mix blend mode. If our layer manager // supports compositing this mix blend mode, we don't actually need to // create a scroll info layer. if (aManager->SupportsMixBlendModes(mContainedBlendModes)) { return nullptr; } } ContainerLayerParameters params = aContainerParameters; if (mScrolledFrame->GetContent() && nsLayoutUtils::HasCriticalDisplayPort(mScrolledFrame->GetContent())) { params.mInLowPrecisionDisplayPort = true; } return aManager->GetLayerBuilder()-> BuildContainerLayerFor(aBuilder, aManager, mFrame, this, &mList, params, nullptr, FrameLayerBuilder::CONTAINER_ALLOW_PULL_BACKGROUND_COLOR); } LayerState nsDisplayScrollInfoLayer::GetLayerState(nsDisplayListBuilder* aBuilder, LayerManager* aManager, const ContainerLayerParameters& aParameters) { return LAYER_ACTIVE_EMPTY; } UniquePtr nsDisplayScrollInfoLayer::ComputeFrameMetrics(Layer* aLayer, const ContainerLayerParameters& aContainerParameters) { ContainerLayerParameters params = aContainerParameters; if (mScrolledFrame->GetContent() && nsLayoutUtils::HasCriticalDisplayPort(mScrolledFrame->GetContent())) { params.mInLowPrecisionDisplayPort = true; } nsRect viewport = mScrollFrame->GetRect() - mScrollFrame->GetPosition() + mScrollFrame->GetOffsetToCrossDoc(ReferenceFrame()); FrameMetrics metrics = nsLayoutUtils::ComputeFrameMetrics( mScrolledFrame, mScrollFrame, mScrollFrame->GetContent(), ReferenceFrame(), aLayer, mScrollParentId, viewport, Nothing(), false, params); metrics.SetIsScrollInfoLayer(true); return UniquePtr(new FrameMetrics(metrics)); } void nsDisplayScrollInfoLayer::IgnoreIfCompositorSupportsBlending(BlendModeSet aBlendModes) { mContainedBlendModes += aBlendModes; mIgnoreIfCompositorSupportsBlending = true; } void nsDisplayScrollInfoLayer::UnsetIgnoreIfCompositorSupportsBlending() { mIgnoreIfCompositorSupportsBlending = false; } bool nsDisplayScrollInfoLayer::ContainedInMixBlendMode() const { return mIgnoreIfCompositorSupportsBlending; } void nsDisplayScrollInfoLayer::WriteDebugInfo(std::stringstream& aStream) { aStream << " (scrollframe " << mScrollFrame << " scrolledFrame " << mScrolledFrame << ")"; } 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.ScaleToOtherAppUnitsRoundOut(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().ScaleToOtherAppUnits(mParentAPD, mAPD)); rect.width = rect.height = 1; } else { rect = aRect.ScaleToOtherAppUnitsRoundOut(mParentAPD, mAPD); } mList.HitTest(aBuilder, rect, aState, aOutFrames); } bool nsDisplayZoom::ComputeVisibility(nsDisplayListBuilder *aBuilder, nsRegion *aVisibleRegion) { // Convert the passed in visible region to our appunits. nsRegion visibleRegion; // mVisibleRect has been clipped to GetClippedBounds visibleRegion.And(*aVisibleRegion, mVisibleRect); visibleRegion = visibleRegion.ScaleToOtherAppUnitsRoundOut(mParentAPD, mAPD); nsRegion originalVisibleRegion = visibleRegion; nsRect transformedVisibleRect = mVisibleRect.ScaleToOtherAppUnitsRoundOut(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 = UseDisplayPortForViewport(aBuilder, mFrame); if (!(mFlags & GENERATE_SCROLLABLE_LAYER) || !usingDisplayPort) { retval = mList.ComputeVisibilityForSublist(aBuilder, &visibleRegion, transformedVisibleRect); } else { retval = nsDisplaySubDocument::ComputeVisibility(aBuilder, &visibleRegion); } nsRegion removed; // removed = originalVisibleRegion - visibleRegion removed.Sub(originalVisibleRegion, visibleRegion); // Convert removed region to parent appunits. removed = removed.ScaleToOtherAppUnitsRoundIn(mAPD, mParentAPD); // aVisibleRegion = aVisibleRegion - removed (modulo any simplifications // SubtractFromVisibleRegion does) aBuilder->SubtractFromVisibleRegion(aVisibleRegion, removed); return retval; } /////////////////////////////////////////////////// // nsDisplayTransform Implementation // // Write #define UNIFIED_CONTINUATIONS here and in // TransformReferenceBox::Initialize 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 nsDisplayTransform::nsDisplayTransform(nsDisplayListBuilder* aBuilder, nsIFrame *aFrame, nsDisplayList *aList, const nsRect& aChildrenVisibleRect, ComputeTransformFunction aTransformGetter, uint32_t aIndex) : nsDisplayItem(aBuilder, aFrame) , mStoredList(aBuilder, aFrame, aList) , mTransformGetter(aTransformGetter) , mAnimatedGeometryRootForChildren(mAnimatedGeometryRoot) , mAnimatedGeometryRootForScrollMetadata(mAnimatedGeometryRoot) , mChildrenVisibleRect(aChildrenVisibleRect) , mIndex(aIndex) , mNoExtendContext(false) , mIsTransformSeparator(false) , mTransformPreserves3DInited(false) { MOZ_COUNT_CTOR(nsDisplayTransform); MOZ_ASSERT(aFrame, "Must have a frame!"); Init(aBuilder); } void nsDisplayTransform::SetReferenceFrameToAncestor(nsDisplayListBuilder* aBuilder) { if (mFrame == aBuilder->RootReferenceFrame()) { return; } nsIFrame *outerFrame = nsLayoutUtils::GetCrossDocParentFrame(mFrame); mReferenceFrame = aBuilder->FindReferenceFrameFor(outerFrame); mToReferenceFrame = mFrame->GetOffsetToCrossDoc(mReferenceFrame); if (nsLayoutUtils::IsFixedPosFrameInDisplayPort(mFrame)) { // This is an odd special case. If we are both IsFixedPosFrameInDisplayPort // and transformed that we are our own AGR parent. // We want our frame to be our AGR because FrameLayerBuilder uses our AGR to // determine if we are inside a fixed pos subtree. If we use the outer AGR // from outside the fixed pos subtree FLB can't tell that we are fixed pos. mAnimatedGeometryRoot = mAnimatedGeometryRootForChildren; } else if (mFrame->StyleDisplay()->mPosition == NS_STYLE_POSITION_STICKY && IsStickyFrameActive(aBuilder, mFrame, nullptr)) { // Similar to the IsFixedPosFrameInDisplayPort case we are our own AGR. // We are inside the sticky position, so our AGR is the sticky positioned // frame, which is our AGR, not the parent AGR. mAnimatedGeometryRoot = mAnimatedGeometryRootForChildren; } else if (mAnimatedGeometryRoot->mParentAGR) { mAnimatedGeometryRootForScrollMetadata = mAnimatedGeometryRoot->mParentAGR; if (!MayBeAnimated(aBuilder)) { // If we're an animated transform then we want the same AGR as our children // so that FrameLayerBuilder knows that this layer moves with the transform // and won't compute occlusions. If we're not animated then use our parent // AGR so that inactive transform layers can go in the same PaintedLayer as // surrounding content. mAnimatedGeometryRoot = mAnimatedGeometryRoot->mParentAGR; } } mVisibleRect = aBuilder->GetDirtyRect() + mToReferenceFrame; } void nsDisplayTransform::Init(nsDisplayListBuilder* aBuilder) { mHasBounds = false; mStoredList.SetClip(aBuilder, DisplayItemClip::NoClip()); mStoredList.SetVisibleRect(mChildrenVisibleRect); mMaybePrerender = ShouldPrerenderTransformedContent(aBuilder, mFrame); const nsStyleDisplay* disp = mFrame->StyleDisplay(); if ((disp->mWillChangeBitField & NS_STYLE_WILL_CHANGE_TRANSFORM)) { // We will only pre-render if this will-change is on budget. mMaybePrerender = true; } if (mMaybePrerender) { bool snap; mVisibleRect = GetBounds(aBuilder, &snap); } } nsDisplayTransform::nsDisplayTransform(nsDisplayListBuilder* aBuilder, nsIFrame *aFrame, nsDisplayList *aList, const nsRect& aChildrenVisibleRect, uint32_t aIndex) : nsDisplayItem(aBuilder, aFrame) , mStoredList(aBuilder, aFrame, aList) , mTransformGetter(nullptr) , mAnimatedGeometryRootForChildren(mAnimatedGeometryRoot) , mAnimatedGeometryRootForScrollMetadata(mAnimatedGeometryRoot) , mChildrenVisibleRect(aChildrenVisibleRect) , mIndex(aIndex) , mNoExtendContext(false) , mIsTransformSeparator(false) , mTransformPreserves3DInited(false) { MOZ_COUNT_CTOR(nsDisplayTransform); MOZ_ASSERT(aFrame, "Must have a frame!"); SetReferenceFrameToAncestor(aBuilder); Init(aBuilder); UpdateBoundsFor3D(aBuilder); } nsDisplayTransform::nsDisplayTransform(nsDisplayListBuilder* aBuilder, nsIFrame *aFrame, nsDisplayItem *aItem, const nsRect& aChildrenVisibleRect, uint32_t aIndex) : nsDisplayItem(aBuilder, aFrame) , mStoredList(aBuilder, aFrame, aItem) , mTransformGetter(nullptr) , mAnimatedGeometryRootForChildren(mAnimatedGeometryRoot) , mAnimatedGeometryRootForScrollMetadata(mAnimatedGeometryRoot) , mChildrenVisibleRect(aChildrenVisibleRect) , mIndex(aIndex) , mNoExtendContext(false) , mIsTransformSeparator(false) , mTransformPreserves3DInited(false) { MOZ_COUNT_CTOR(nsDisplayTransform); MOZ_ASSERT(aFrame, "Must have a frame!"); SetReferenceFrameToAncestor(aBuilder); Init(aBuilder); } nsDisplayTransform::nsDisplayTransform(nsDisplayListBuilder* aBuilder, nsIFrame *aFrame, nsDisplayList *aList, const nsRect& aChildrenVisibleRect, const Matrix4x4& aTransform, uint32_t aIndex) : nsDisplayItem(aBuilder, aFrame) , mStoredList(aBuilder, aFrame, aList) , mTransform(aTransform) , mTransformGetter(nullptr) , mAnimatedGeometryRootForChildren(mAnimatedGeometryRoot) , mAnimatedGeometryRootForScrollMetadata(mAnimatedGeometryRoot) , mChildrenVisibleRect(aChildrenVisibleRect) , mIndex(aIndex) , mNoExtendContext(false) , mIsTransformSeparator(true) , mTransformPreserves3DInited(false) { MOZ_COUNT_CTOR(nsDisplayTransform); MOZ_ASSERT(aFrame, "Must have a frame!"); Init(aBuilder); UpdateBoundsFor3D(aBuilder); } /* Returns the delta specified by the 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 */ Point3D 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() || aFrame->Combines3DTransformWithAncestors(), "Shouldn't get a delta for an untransformed frame!"); if (!aFrame->IsTransformed()) { return Point3D(); } /* For both of the coordinates, if the value of 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(); // We don't use aBoundsOverride for SVG since we need to account for // refBox.X/Y(). This happens to work because ReflowSVG sets the frame's // mRect before calling FinishAndStoreOverflow so we don't need the override. TransformReferenceBox refBox; if (aBoundsOverride && !(aFrame->GetStateBits() & NS_FRAME_SVG_LAYOUT)) { refBox.Init(aBoundsOverride->Size()); } else { refBox.Init(aFrame); } /* Allows us to access dimension getters by index. */ float coords[2]; TransformReferenceBox::DimensionGetter dimensionGetter[] = { &TransformReferenceBox::Width, &TransformReferenceBox::Height }; TransformReferenceBox::DimensionGetter offsetGetter[] = { &TransformReferenceBox::X, &TransformReferenceBox::Y }; for (uint8_t index = 0; index < 2; ++index) { /* If the 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((refBox.*dimensionGetter[index])(), aAppUnitsPerPixel) * calc->mPercent + NSAppUnitsToFloatPixels(calc->mLength, aAppUnitsPerPixel); } else if (coord.GetUnit() == eStyleUnit_Percent) { coords[index] = NSAppUnitsToFloatPixels((refBox.*dimensionGetter[index])(), aAppUnitsPerPixel) * coord.GetPercentValue(); } else { MOZ_ASSERT(coord.GetUnit() == eStyleUnit_Coord, "unexpected unit"); coords[index] = NSAppUnitsToFloatPixels(coord.GetCoordValue(), aAppUnitsPerPixel); } if (aFrame->GetStateBits() & NS_FRAME_SVG_LAYOUT) { // SVG frames (unlike other frames) have a reference box that can be (and // typically is) offset from the TopLeft() of the frame. We need to // account for that here. coords[index] += NSAppUnitsToFloatPixels((refBox.*offsetGetter[index])(), aAppUnitsPerPixel); } } return Point3D(coords[0], coords[1], NSAppUnitsToFloatPixels(display->mTransformOrigin[2].GetCoordValue(), aAppUnitsPerPixel)); } /* static */ bool nsDisplayTransform::ComputePerspectiveMatrix(const nsIFrame* aFrame, float aAppUnitsPerPixel, Matrix4x4& aOutMatrix) { NS_PRECONDITION(aFrame, "Can't get delta for a null frame!"); NS_PRECONDITION(aFrame->IsTransformed() || aFrame->StyleDisplay()->BackfaceIsHidden() || aFrame->Combines3DTransformWithAncestors(), "Shouldn't get a delta for an untransformed frame!"); NS_PRECONDITION(aOutMatrix.IsIdentity(), "Must have a blank output matrix"); if (!aFrame->IsTransformed()) { return false; } /* Find our containing block, which is the element that provides the * value for perspective we need to use */ //TODO: Is it possible that the cbFrame's bounds haven't been set correctly yet // (similar to the aBoundsOverride case for GetResultingTransformMatrix)? nsIFrame* cbFrame = aFrame->GetContainingBlock(nsIFrame::SKIP_SCROLLED_FRAME); if (!cbFrame) { return false; } /* Grab the values for perspective and perspective-origin (if present) */ const nsStyleDisplay* cbDisplay = cbFrame->StyleDisplay(); if (cbDisplay->mChildPerspective.GetUnit() != eStyleUnit_Coord) { return false; } nscoord perspective = cbDisplay->mChildPerspective.GetCoordValue(); if (perspective <= 0) { return true; } TransformReferenceBox refBox(cbFrame); /* Allows us to access named variables by index. */ Point3D perspectiveOrigin; gfx::Float* coords[2] = {&perspectiveOrigin.x, &perspectiveOrigin.y}; TransformReferenceBox::DimensionGetter dimensionGetter[] = { &TransformReferenceBox::Width, &TransformReferenceBox::Height }; /* For both of the coordinates, if the value of 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! */ for (uint8_t index = 0; index < 2; ++index) { /* If the -transform-origin specifies a percentage, take the percentage * of the size of the box. */ const nsStyleCoord &coord = cbDisplay->mPerspectiveOrigin[index]; if (coord.GetUnit() == eStyleUnit_Calc) { const nsStyleCoord::Calc *calc = coord.GetCalcValue(); *coords[index] = NSAppUnitsToFloatPixels((refBox.*dimensionGetter[index])(), aAppUnitsPerPixel) * calc->mPercent + NSAppUnitsToFloatPixels(calc->mLength, aAppUnitsPerPixel); } else if (coord.GetUnit() == eStyleUnit_Percent) { *coords[index] = NSAppUnitsToFloatPixels((refBox.*dimensionGetter[index])(), aAppUnitsPerPixel) * coord.GetPercentValue(); } else { MOZ_ASSERT(coord.GetUnit() == eStyleUnit_Coord, "unexpected unit"); *coords[index] = NSAppUnitsToFloatPixels(coord.GetCoordValue(), aAppUnitsPerPixel); } } /* GetOffsetTo computes the offset required to move from 0,0 in cbFrame to 0,0 * in aFrame. Although we actually want the inverse of this, it's faster to * compute this way. */ nsPoint frameToCbOffset = -aFrame->GetOffsetTo(cbFrame); Point3D frameToCbGfxOffset( NSAppUnitsToFloatPixels(frameToCbOffset.x, aAppUnitsPerPixel), NSAppUnitsToFloatPixels(frameToCbOffset.y, aAppUnitsPerPixel), 0.0f); /* Move the perspective origin to be relative to aFrame, instead of relative * to the containing block which is how it was specified in the style system. */ perspectiveOrigin += frameToCbGfxOffset; aOutMatrix._34 = -1.0 / NSAppUnitsToFloatPixels(perspective, aAppUnitsPerPixel); aOutMatrix.ChangeBasis(perspectiveOrigin); return true; } nsDisplayTransform::FrameTransformProperties::FrameTransformProperties(const nsIFrame* aFrame, float aAppUnitsPerPixel, const nsRect* aBoundsOverride) : mFrame(aFrame) , mTransformList(aFrame->StyleDisplay()->mSpecifiedTransform) , mToTransformOrigin(GetDeltaToTransformOrigin(aFrame, aAppUnitsPerPixel, aBoundsOverride)) { } /* Wraps up the transform matrix in a change-of-basis matrix pair that * translates from local coordinate space to transform coordinate space, then * hands it back. */ Matrix4x4 nsDisplayTransform::GetResultingTransformMatrix(const FrameTransformProperties& aProperties, const nsPoint& aOrigin, float aAppUnitsPerPixel, uint32_t aFlags, const nsRect* aBoundsOverride, nsIFrame** aOutAncestor) { return GetResultingTransformMatrixInternal(aProperties, aOrigin, aAppUnitsPerPixel, aFlags, aBoundsOverride, aOutAncestor); } Matrix4x4 nsDisplayTransform::GetResultingTransformMatrix(const nsIFrame* aFrame, const nsPoint& aOrigin, float aAppUnitsPerPixel, uint32_t aFlags, const nsRect* aBoundsOverride, nsIFrame** aOutAncestor) { FrameTransformProperties props(aFrame, aAppUnitsPerPixel, aBoundsOverride); return GetResultingTransformMatrixInternal(props, aOrigin, aAppUnitsPerPixel, aFlags, aBoundsOverride, aOutAncestor); } Matrix4x4 nsDisplayTransform::GetResultingTransformMatrixInternal(const FrameTransformProperties& aProperties, const nsPoint& aOrigin, float aAppUnitsPerPixel, uint32_t aFlags, const nsRect* aBoundsOverride, nsIFrame** aOutAncestor) { const nsIFrame *frame = aProperties.mFrame; NS_ASSERTION(frame || !(aFlags & INCLUDE_PERSPECTIVE), "Must have a frame to compute perspective!"); MOZ_ASSERT((aFlags & (OFFSET_BY_ORIGIN|BASIS_AT_ORIGIN)) != (OFFSET_BY_ORIGIN|BASIS_AT_ORIGIN), "Can't specify offset by origin as well as basis at origin!"); if (aOutAncestor) { *aOutAncestor = nsLayoutUtils::GetCrossDocParentFrame(frame); } // Get the underlying transform matrix: // We don't use aBoundsOverride for SVG since we need to account for // refBox.X/Y(). This happens to work because ReflowSVG sets the frame's // mRect before calling FinishAndStoreOverflow so we don't need the override. TransformReferenceBox refBox; if (aBoundsOverride && (!frame || !(frame->GetStateBits() & NS_FRAME_SVG_LAYOUT))) { refBox.Init(aBoundsOverride->Size()); } else { refBox.Init(frame); } /* Get the matrix, then change its basis to factor in the origin. */ RuleNodeCacheConditions dummy; Matrix4x4 result; // Call IsSVGTransformed() regardless of the value of // disp->mSpecifiedTransform, since we still need any transformFromSVGParent. Matrix svgTransform, transformFromSVGParent; bool hasSVGTransforms = frame && frame->IsSVGTransformed(&svgTransform, &transformFromSVGParent); bool hasTransformFromSVGParent = hasSVGTransforms && !transformFromSVGParent.IsIdentity(); /* 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, refBox, aAppUnitsPerPixel); } else if (hasSVGTransforms) { // Correct the translation components for zoom: float pixelsPerCSSPx = frame->PresContext()->AppUnitsPerCSSPixel() / aAppUnitsPerPixel; svgTransform._31 *= pixelsPerCSSPx; svgTransform._32 *= pixelsPerCSSPx; result = Matrix4x4::From2D(svgTransform); } /* Account for the transform-origin property by translating the * coordinate space to the new origin. */ Point3D newOrigin = Point3D(NSAppUnitsToFloatPixels(aOrigin.x, aAppUnitsPerPixel), NSAppUnitsToFloatPixels(aOrigin.y, aAppUnitsPerPixel), 0.0f); Point3D roundedOrigin(hasSVGTransforms ? newOrigin.x : NS_round(newOrigin.x), hasSVGTransforms ? newOrigin.y : NS_round(newOrigin.y), 0); Matrix4x4 perspectiveMatrix; bool hasPerspective = aFlags & INCLUDE_PERSPECTIVE; if (hasPerspective) { hasPerspective = ComputePerspectiveMatrix(frame, aAppUnitsPerPixel, perspectiveMatrix); } if (!hasSVGTransforms || !hasTransformFromSVGParent) { // This is a simplification of the following |else| block, the // simplification being possible because we don't need to apply // mToTransformOrigin between two transforms. if ((aFlags & OFFSET_BY_ORIGIN) && !hasPerspective) { // 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.PreTranslate(-aProperties.mToTransformOrigin); result.PostTranslate(roundedOrigin + aProperties.mToTransformOrigin); } else { result.ChangeBasis(aProperties.mToTransformOrigin); } } else { Point3D refBoxOffset(NSAppUnitsToFloatPixels(refBox.X(), aAppUnitsPerPixel), NSAppUnitsToFloatPixels(refBox.Y(), aAppUnitsPerPixel), 0); // We have both a transform and children-only transform. The // 'transform-origin' must apply between the two, so we need to apply it // now before we apply transformFromSVGParent. Since mToTransformOrigin is // relative to the frame's TopLeft(), we need to convert it to SVG user // space by subtracting refBoxOffset. (Then after applying // transformFromSVGParent we have to reapply refBoxOffset below.) result.ChangeBasis(aProperties.mToTransformOrigin - refBoxOffset); // Now apply the children-only transforms, converting the translation // components to device pixels: float pixelsPerCSSPx = frame->PresContext()->AppUnitsPerCSSPixel() / aAppUnitsPerPixel; transformFromSVGParent._31 *= pixelsPerCSSPx; transformFromSVGParent._32 *= pixelsPerCSSPx; result = result * Matrix4x4::From2D(transformFromSVGParent); // Similar to the code in the |if| block above, but since we've accounted // for mToTransformOrigin so we don't include that. We also need to reapply // refBoxOffset. if ((aFlags & OFFSET_BY_ORIGIN) && !hasPerspective) { result.PreTranslate(-refBoxOffset); result.PostTranslate(roundedOrigin + refBoxOffset); } else { result.ChangeBasis(refBoxOffset); } } if (hasPerspective) { result = result * perspectiveMatrix; if (aFlags & OFFSET_BY_ORIGIN) { result.PostTranslate(roundedOrigin); } } if (aFlags & BASIS_AT_ORIGIN) { result.ChangeBasis(roundedOrigin); } if ((aFlags & INCLUDE_PRESERVE3D_ANCESTORS) && frame && frame->Combines3DTransformWithAncestors()) { // Include the transform set on our parent NS_ASSERTION(frame->GetParent() && frame->GetParent()->IsTransformed() && frame->GetParent()->Extend3DContext(), "Preserve3D mismatch!"); FrameTransformProperties props(frame->GetParent(), aAppUnitsPerPixel, nullptr); // If this frame isn't transformed (but we exist for backface-visibility), // then we're not a reference frame so no offset to origin will be added. Our // parent transform however *is* the reference frame, so we pass // OFFSET_BY_ORIGIN to convert into the correct coordinate space. uint32_t flags = aFlags & (INCLUDE_PRESERVE3D_ANCESTORS|INCLUDE_PERSPECTIVE); if (!frame->IsTransformed()) { flags |= OFFSET_BY_ORIGIN; } else { flags |= BASIS_AT_ORIGIN; } Matrix4x4 parent = GetResultingTransformMatrixInternal(props, aOrigin - frame->GetPosition(), aAppUnitsPerPixel, flags, nullptr, aOutAncestor); result = result * parent; } return result; } bool nsDisplayOpacity::CanUseAsyncAnimations(nsDisplayListBuilder* aBuilder) { if (ActiveLayerTracker::IsStyleAnimated(aBuilder, 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"); AnimationUtils::LogAsyncAnimationFailure(message, Frame()->GetContent()); } return false; } bool nsDisplayTransform::ShouldPrerender(nsDisplayListBuilder* aBuilder) { if (!mMaybePrerender) { return false; } if (ShouldPrerenderTransformedContent(aBuilder, mFrame)) { return true; } const nsStyleDisplay* disp = mFrame->StyleDisplay(); if ((disp->mWillChangeBitField & NS_STYLE_WILL_CHANGE_TRANSFORM) && aBuilder->IsInWillChangeBudget(mFrame, mFrame->GetSize())) { return true; } return false; } bool nsDisplayTransform::CanUseAsyncAnimations(nsDisplayListBuilder* aBuilder) { if (mMaybePrerender) { // TODO We need to make sure that if we use async animation we actually // pre-render even if we're out of will change budget. return true; } DebugOnly prerender = ShouldPrerenderTransformedContent(aBuilder, mFrame, true); NS_ASSERTION(!prerender, "Something changed under us!"); return false; } /* 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::IsStyleMaybeAnimated(aFrame, eCSSProperty_transform) && !EffectCompositor::HasAnimationsForCompositor(aFrame, eCSSProperty_transform)) { if (aLogAnimations) { nsCString message; message.AppendLiteral("Performance warning: Async animation disabled because frame was not marked active for transform animation"); AnimationUtils::LogAsyncAnimationFailure(message, aFrame->GetContent()); } return false; } nsSize refSize = aBuilder->RootReferenceFrame()->GetSize(); // Only prerender if the transformed frame's size is <= the // reference frame size (~viewport), allowing a 1/8th fuzz factor // for shadows, borders, etc. refSize += nsSize(refSize.width / 8, refSize.height / 8); nsSize frameSize = aFrame->GetVisualOverflowRectRelativeToSelf().Size(); nscoord maxInAppUnits = nscoord_MAX; if (frameSize <= refSize) { maxInAppUnits = aFrame->PresContext()->DevPixelsToAppUnits(4096); nsRect visual = aFrame->GetVisualOverflowRect(); if (visual.width <= maxInAppUnits && visual.height <= maxInAppUnits) { return true; } } if (aLogAnimations) { nsRect visual = aFrame->GetVisualOverflowRect(); nsCString message; message.AppendLiteral("Performance warning: Async animation disabled because frame size ("); message.AppendInt(nsPresContext::AppUnitsToIntCSSPixels(frameSize.width)); message.AppendLiteral(", "); message.AppendInt(nsPresContext::AppUnitsToIntCSSPixels(frameSize.height)); message.AppendLiteral(") is bigger than the viewport ("); message.AppendInt(nsPresContext::AppUnitsToIntCSSPixels(refSize.width)); message.AppendLiteral(", "); message.AppendInt(nsPresContext::AppUnitsToIntCSSPixels(refSize.height)); message.AppendLiteral(") or the visual rectangle ("); message.AppendInt(nsPresContext::AppUnitsToIntCSSPixels(visual.width)); message.AppendLiteral(", "); message.AppendInt(nsPresContext::AppUnitsToIntCSSPixels(visual.height)); message.AppendLiteral(") is larger than the max allowable value ("); message.AppendInt(nsPresContext::AppUnitsToIntCSSPixels(maxInAppUnits)); message.Append(')'); AnimationUtils::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 Matrix4x4& aMatrix) { if (aMatrix.IsSingular()) { return false; } if (aFrame->StyleDisplay()->mBackfaceVisibility == NS_STYLE_BACKFACE_VISIBILITY_HIDDEN && aMatrix.IsBackfaceVisible()) { return false; } return true; } const Matrix4x4& nsDisplayTransform::GetTransform() { if (mTransform.IsIdentity()) { float scale = mFrame->PresContext()->AppUnitsPerDevPixel(); Point3D newOrigin = Point3D(NSAppUnitsToFloatPixels(mToReferenceFrame.x, scale), NSAppUnitsToFloatPixels(mToReferenceFrame.y, scale), 0.0f); if (mTransformGetter) { mTransform = mTransformGetter(mFrame, scale); mTransform.ChangeBasis(newOrigin.x, newOrigin.y, newOrigin.z); } else if (!mIsTransformSeparator) { DebugOnly isReference = mFrame->IsTransformed() || mFrame->Combines3DTransformWithAncestors() || mFrame->Extend3DContext(); MOZ_ASSERT(isReference); mTransform = GetResultingTransformMatrix(mFrame, ToReferenceFrame(), scale, INCLUDE_PERSPECTIVE|OFFSET_BY_ORIGIN); } } return mTransform; } Matrix4x4 nsDisplayTransform::GetTransformForRendering() { if (!mFrame->HasPerspective() || mTransformGetter || mIsTransformSeparator) { return GetTransform(); } MOZ_ASSERT(!mTransformGetter); float scale = mFrame->PresContext()->AppUnitsPerDevPixel(); // Don't include perspective transform, or the offset to origin, since // nsDisplayPerspective will handle both of those. return GetResultingTransformMatrix(mFrame, ToReferenceFrame(), scale, 0); } const Matrix4x4& nsDisplayTransform::GetAccumulatedPreserved3DTransform(nsDisplayListBuilder* aBuilder) { MOZ_ASSERT(!mFrame->Extend3DContext() || IsLeafOf3DContext()); // XXX: should go back to fix mTransformGetter. if (!mTransformPreserves3DInited) { mTransformPreserves3DInited = true; if (!IsLeafOf3DContext()) { mTransformPreserves3D = GetTransform(); return mTransformPreserves3D; } const nsIFrame* establisher; // Establisher of the 3D rendering context. for (establisher = nsLayoutUtils::GetCrossDocParentFrame(mFrame); establisher && establisher->Combines3DTransformWithAncestors(); establisher = nsLayoutUtils::GetCrossDocParentFrame(establisher)) { } establisher = nsLayoutUtils::GetCrossDocParentFrame(establisher); const nsIFrame* establisherReference = aBuilder->FindReferenceFrameFor(establisher); nsPoint offset = mFrame->GetOffsetToCrossDoc(establisherReference); float scale = mFrame->PresContext()->AppUnitsPerDevPixel(); uint32_t flags = INCLUDE_PRESERVE3D_ANCESTORS|INCLUDE_PERSPECTIVE|OFFSET_BY_ORIGIN; mTransformPreserves3D = GetResultingTransformMatrix(mFrame, offset, scale, flags); } return mTransformPreserves3D; } bool nsDisplayTransform::ShouldBuildLayerEvenIfInvisible(nsDisplayListBuilder* aBuilder) { // The visible rect of a Preserves-3D frame is just an intermediate // result. It should always build a layer to make sure it is // rendering correctly. return ShouldPrerender(aBuilder) || mFrame->Combines3DTransformWithAncestors(); } already_AddRefed nsDisplayTransform::BuildLayer(nsDisplayListBuilder *aBuilder, LayerManager *aManager, const ContainerLayerParameters& aContainerParameters) { /* For frames without transform, it would not be removed for * backface hidden here. But, it would be removed by the init * function of nsDisplayTransform. */ const Matrix4x4& newTransformMatrix = GetTransformForRendering(); uint32_t flags = ShouldPrerender(aBuilder) ? FrameLayerBuilder::CONTAINER_NOT_CLIPPED_BY_ANCESTORS : 0; flags |= FrameLayerBuilder::CONTAINER_ALLOW_PULL_BACKGROUND_COLOR; RefPtr 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->Extend3DContext() && !mNoExtendContext) { container->SetContentFlags(container->GetContentFlags() | Layer::CONTENT_EXTEND_3D_CONTEXT); } else { container->SetContentFlags(container->GetContentFlags() & ~Layer::CONTENT_EXTEND_3D_CONTEXT); } nsDisplayListBuilder::AddAnimationsAndTransitionsToLayer(container, aBuilder, this, mFrame, eCSSProperty_transform); if (ShouldPrerender(aBuilder)) { if (MayBeAnimated(aBuilder)) { // Only allow async updates to the transform if we're an animated layer, since that's what // triggers us to set the correct AGR in the constructor and makes sure FrameLayerBuilder // won't compute occlusions for this layer. 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(); } bool nsDisplayTransform::MayBeAnimated(nsDisplayListBuilder* aBuilder) { // Here we check if the *post-transform* bounds of this item are big enough // to justify an active layer. if (ActiveLayerTracker::IsStyleAnimated(aBuilder, mFrame, eCSSProperty_transform) && !IsItemTooSmallForActiveLayer(this)) return true; if (EffectCompositor::HasAnimationsForCompositor(mFrame, eCSSProperty_transform)) { return true; } return false; } nsDisplayItem::LayerState nsDisplayTransform::GetLayerState(nsDisplayListBuilder* aBuilder, LayerManager* aManager, const ContainerLayerParameters& aParameters) { // If the transform is 3d, the layer takes part in preserve-3d // sorting, or the layer is a separator then we *always* want this // to be an active layer. if (!GetTransform().Is2D() || mFrame->Combines3DTransformWithAncestors() || mIsTransformSeparator) { return LAYER_ACTIVE_FORCE; } if (MayBeAnimated(aBuilder)) { 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(), mAnimatedGeometryRootForChildren); } bool nsDisplayTransform::ComputeVisibility(nsDisplayListBuilder *aBuilder, nsRegion *aVisibleRegion) { /* 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 (ShouldPrerender(aBuilder) || !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) { if (aState->mInPreserves3D) { mStoredList.HitTest(aBuilder, aRect, aState, aOutFrames); return; } /* 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(); Matrix4x4 matrix = GetAccumulatedPreserved3DTransform(aBuilder); 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) */ /* Now, apply the transform and pass it down the channel. */ matrix.Invert(); nsRect resultingRect; if (aRect.width == 1 && aRect.height == 1) { // Magic width/height indicating we're hit testing a point, not a rect Point4D point = matrix.ProjectPoint(Point(NSAppUnitsToFloatPixels(aRect.x, factor), NSAppUnitsToFloatPixels(aRect.y, factor))); if (!point.HasPositiveWCoord()) { return; } Point point2d = point.As2DPoint(); resultingRect = nsRect(NSFloatPixelsToAppUnits(float(point2d.x), factor), NSFloatPixelsToAppUnits(float(point2d.y), factor), 1, 1); } else { Rect originalRect(NSAppUnitsToFloatPixels(aRect.x, factor), NSAppUnitsToFloatPixels(aRect.y, factor), NSAppUnitsToFloatPixels(aRect.width, factor), NSAppUnitsToFloatPixels(aRect.height, factor)); bool snap; nsRect childBounds = mStoredList.GetBounds(aBuilder, &snap); Rect childGfxBounds(NSAppUnitsToFloatPixels(childBounds.x, factor), NSAppUnitsToFloatPixels(childBounds.y, factor), NSAppUnitsToFloatPixels(childBounds.width, factor), NSAppUnitsToFloatPixels(childBounds.height, factor)); Rect rect = matrix.ProjectRectBounds(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(); Matrix4x4 matrix = GetAccumulatedPreserved3DTransform(aBuilder); NS_ASSERTION(IsFrameVisible(mFrame, matrix), "We can't have hit a frame that isn't visible!"); Matrix4x4 inverse = matrix; inverse.Invert(); Point4D point = inverse.ProjectPoint(Point(NSAppUnitsToFloatPixels(aPoint.x, factor), NSAppUnitsToFloatPixels(aPoint.y, factor))); Point point2d = point.As2DPoint(); Point3D transformed = matrix * Point3D(point2d.x, point2d.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) { *aSnap = false; if (mHasBounds) { return mBounds; } if (mFrame->Extend3DContext() && !mIsTransformSeparator) { return nsRect(); } nsRect untransformedBounds = MaybePrerender() ? mFrame->GetVisualOverflowRectRelativeToSelf() : mStoredList.GetBounds(aBuilder, aSnap); // GetTransform always operates in dev pixels. float factor = mFrame->PresContext()->AppUnitsPerDevPixel(); mBounds = nsLayoutUtils::MatrixTransformRect(untransformedBounds, GetTransform(), factor); mHasBounds = true; return mBounds; } void nsDisplayTransform::ComputeBounds(nsDisplayListBuilder* aBuilder) { MOZ_ASSERT(mFrame->Extend3DContext() || IsLeafOf3DContext()); /* For some cases, the transform would make an empty bounds, but it * may be turned back again to get a non-empty bounds. We should * not depend on transforming bounds level by level. * * Here, it applies accumulated transforms on the leaf frames of the * 3d rendering context, and track and accmulate bounds at * nsDisplayListBuilder. */ nsDisplayListBuilder::AutoAccumulateTransform accTransform(aBuilder); accTransform.Accumulate(GetTransform()); if (!IsLeafOf3DContext()) { // Do not dive into another 3D context. mStoredList.DoUpdateBoundsPreserves3D(aBuilder); } /* For Preserves3D, it is bounds of only children as leaf frames. * For non-leaf frames, their bounds are accumulated and kept at * nsDisplayListBuilder. */ bool snap; nsRect untransformedBounds = MaybePrerender() ? mFrame->GetVisualOverflowRectRelativeToSelf() : mStoredList.GetBounds(aBuilder, &snap); // GetTransform always operates in dev pixels. float factor = mFrame->PresContext()->AppUnitsPerDevPixel(); nsRect rect = nsLayoutUtils::MatrixTransformRect(untransformedBounds, accTransform.GetCurrentTransform(), factor); aBuilder->AccumulateRect(rect); } /* 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 (MaybePrerender() || !UntransformVisibleRect(aBuilder, &untransformedVisible)) { return nsRegion(); } const Matrix4x4& matrix = GetTransform(); nsRegion result; Matrix matrix2d; bool tmpSnap; if (matrix.Is2D(&matrix2d) && matrix2d.PreservesAxisAlignedRectangles() && mStoredList.GetOpaqueRegion(aBuilder, &tmpSnap).Contains(untransformedVisible)) { result = mVisibleRect.Intersect(GetBounds(aBuilder, &tmpSnap)); } 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 Matrix4x4& matrix = GetTransform(); Matrix 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(nsDisplayItem *aItem) { return false; } #else bool nsDisplayTransform::TryMerge(nsDisplayItem *aItem) { NS_PRECONDITION(aItem, "Why did you try merging with a null item?"); /* 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; if (aItem->ScrollClip() != ScrollClip()) return false; /* Now, move everything over to this frame and signal that * we merged things! */ mStoredList.MergeFromTrackingMergedFrames(&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, bool aPreserves3D) { NS_PRECONDITION(aFrame, "Can't take the transform based on a null frame!"); float factor = aFrame->PresContext()->AppUnitsPerDevPixel(); uint32_t flags = INCLUDE_PERSPECTIVE|BASIS_AT_ORIGIN; if (aPreserves3D) { flags |= INCLUDE_PRESERVE3D_ANCESTORS; } return nsLayoutUtils::MatrixTransformRect (aUntransformedBounds, GetResultingTransformMatrix(aFrame, aOrigin, factor, flags, aBoundsOverride), factor); } bool nsDisplayTransform::UntransformRect(const nsRect &aTransformedBounds, const nsRect &aChildBounds, const nsIFrame* aFrame, const nsPoint &aOrigin, nsRect *aOutRect, bool aPreserves3D) { NS_PRECONDITION(aFrame, "Can't take the transform based on a null frame!"); float factor = aFrame->PresContext()->AppUnitsPerDevPixel(); uint32_t flags = INCLUDE_PERSPECTIVE|BASIS_AT_ORIGIN; if (aPreserves3D) { flags |= INCLUDE_PRESERVE3D_ANCESTORS; } Matrix4x4 transform = GetResultingTransformMatrix(aFrame, aOrigin, factor, flags); if (transform.IsSingular()) { return false; } RectDouble result(NSAppUnitsToFloatPixels(aTransformedBounds.x, factor), NSAppUnitsToFloatPixels(aTransformedBounds.y, factor), NSAppUnitsToFloatPixels(aTransformedBounds.width, factor), NSAppUnitsToFloatPixels(aTransformedBounds.height, factor)); RectDouble childGfxBounds(NSAppUnitsToFloatPixels(aChildBounds.x, factor), NSAppUnitsToFloatPixels(aChildBounds.y, factor), NSAppUnitsToFloatPixels(aChildBounds.width, factor), NSAppUnitsToFloatPixels(aChildBounds.height, factor)); result = transform.Inverse().ProjectRectBounds(result, childGfxBounds); *aOutRect = nsLayoutUtils::RoundGfxRectToAppRect(ThebesRect(result), factor); return true; } bool nsDisplayTransform::UntransformVisibleRect(nsDisplayListBuilder* aBuilder, nsRect *aOutRect) { const Matrix4x4& matrix = GetTransform(); if (matrix.IsSingular()) return false; // GetTransform always operates in dev pixels. float factor = mFrame->PresContext()->AppUnitsPerDevPixel(); RectDouble 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); RectDouble 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.Inverse().ProjectRectBounds(result, childGfxBounds); *aOutRect = nsLayoutUtils::RoundGfxRectToAppRect(ThebesRect(result), factor); return true; } void nsDisplayTransform::WriteDebugInfo(std::stringstream& aStream) { AppendToString(aStream, GetTransform()); if (IsTransformSeparator()) { aStream << " transform-separator"; } if (IsLeafOf3DContext()) { aStream << " 3d-context-leaf"; } if (mFrame->Extend3DContext()) { aStream << " extends-3d-context"; } if (mFrame->Combines3DTransformWithAncestors()) { aStream << " combines-3d-with-ancestors"; } } nsDisplayPerspective::nsDisplayPerspective(nsDisplayListBuilder* aBuilder, nsIFrame* aTransformFrame, nsIFrame* aPerspectiveFrame, nsDisplayList* aList) : nsDisplayItem(aBuilder, aPerspectiveFrame) , mList(aBuilder, aPerspectiveFrame, aList) , mTransformFrame(aTransformFrame) , mIndex(aBuilder->AllocatePerspectiveItemIndex()) { MOZ_ASSERT(mList.GetChildren()->Count() == 1); MOZ_ASSERT(mList.GetChildren()->GetTop()->GetType() == TYPE_TRANSFORM); } already_AddRefed nsDisplayPerspective::BuildLayer(nsDisplayListBuilder *aBuilder, LayerManager *aManager, const ContainerLayerParameters& aContainerParameters) { float appUnitsPerPixel = mFrame->PresContext()->AppUnitsPerDevPixel(); Matrix4x4 perspectiveMatrix; DebugOnly hasPerspective = nsDisplayTransform::ComputePerspectiveMatrix(mTransformFrame, appUnitsPerPixel, perspectiveMatrix); MOZ_ASSERT(hasPerspective, "Why did we create nsDisplayPerspective?"); /* * The resulting matrix is still in the coordinate space of the transformed * frame. Append a translation to the reference frame coordinates. */ nsDisplayTransform* transform = static_cast(mList.GetChildren()->GetTop()); Point3D newOrigin = Point3D(NSAppUnitsToFloatPixels(transform->ToReferenceFrame().x, appUnitsPerPixel), NSAppUnitsToFloatPixels(transform->ToReferenceFrame().y, appUnitsPerPixel), 0.0f); Point3D roundedOrigin(NS_round(newOrigin.x), NS_round(newOrigin.y), 0); perspectiveMatrix.PostTranslate(roundedOrigin); RefPtr container = aManager->GetLayerBuilder()-> BuildContainerLayerFor(aBuilder, aManager, mFrame, this, mList.GetChildren(), aContainerParameters, &perspectiveMatrix, 0); if (!container) { return nullptr; } // Sort of a lie, but we want to pretend that the perspective layer extends a 3d context // so that it gets its transform combined with children. Might need a better name that reflects // this use case and isn't specific to preserve-3d. container->SetContentFlags(container->GetContentFlags() | Layer::CONTENT_EXTEND_3D_CONTEXT); container->SetTransformIsPerspective(true); return container.forget(); } LayerState nsDisplayPerspective::GetLayerState(nsDisplayListBuilder* aBuilder, LayerManager* aManager, const ContainerLayerParameters& aParameters) { return LAYER_ACTIVE_FORCE; } int32_t nsDisplayPerspective::ZIndex() const { return ZIndexForFrame(mTransformFrame); } nsDisplayItemGeometry* nsCharClipDisplayItem::AllocateGeometry(nsDisplayListBuilder* aBuilder) { return new nsCharClipGeometry(this, aBuilder); } void nsCharClipDisplayItem::ComputeInvalidationRegion(nsDisplayListBuilder* aBuilder, const nsDisplayItemGeometry* aGeometry, nsRegion* aInvalidRegion) { const nsCharClipGeometry* geometry = static_cast(aGeometry); bool snap; nsRect newRect = geometry->mBounds; nsRect oldRect = GetBounds(aBuilder, &snap); if (mVisIStartEdge != geometry->mVisIStartEdge || mVisIEndEdge != geometry->mVisIEndEdge || !oldRect.IsEqualInterior(newRect) || !geometry->mBorderRect.IsEqualInterior(GetBorderRect())) { aInvalidRegion->Or(oldRect, newRect); } } 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 nsDisplayVR::nsDisplayVR(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame, nsDisplayList* aList, mozilla::gfx::VRDeviceProxy* aHMD) : nsDisplayOwnLayer(aBuilder, aFrame, aList) , mHMD(aHMD) { } already_AddRefed nsDisplayVR::BuildLayer(nsDisplayListBuilder* aBuilder, LayerManager* aManager, const ContainerLayerParameters& aContainerParameters) { ContainerLayerParameters newContainerParameters = aContainerParameters; uint32_t flags = FrameLayerBuilder::CONTAINER_NOT_CLIPPED_BY_ANCESTORS | FrameLayerBuilder::CONTAINER_ALLOW_PULL_BACKGROUND_COLOR; RefPtr container = aManager->GetLayerBuilder()-> BuildContainerLayerFor(aBuilder, aManager, mFrame, this, &mList, newContainerParameters, nullptr, flags); container->SetVRDeviceID(mHMD->GetDeviceInfo().GetDeviceID()); container->SetUserData(nsIFrame::LayerIsPrerenderedDataKey(), /*the value is irrelevant*/nullptr); return container.forget(); } 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->ThebesContext(), 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()->IsSVGElement()) { 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; } RefPtr container = aManager->GetLayerBuilder()-> BuildContainerLayerFor(aBuilder, aManager, mFrame, this, &mList, newContainerParameters, nullptr); return container.forget(); } bool nsDisplaySVGEffects::ComputeVisibility(nsDisplayListBuilder* aBuilder, nsRegion* aVisibleRegion) { 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); return true; } bool nsDisplaySVGEffects::TryMerge(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; if (aItem->ScrollClip() != ScrollClip()) return false; nsDisplaySVGEffects* other = static_cast(aItem); MergeFromTrackingMergedFrames(other); mEffectsBounds.UnionRect(mEffectsBounds, other->mEffectsBounds + other->mFrame->GetOffsetTo(mFrame)); return true; } gfxRect nsDisplaySVGEffects::BBoxInUserSpace() const { return nsSVGUtils::GetBBox(mFrame); } gfxPoint nsDisplaySVGEffects::UserSpaceOffset() const { return nsSVGUtils::FrameSpaceInCSSPxToUserSpaceOffset(mFrame); } void nsDisplaySVGEffects::ComputeInvalidationRegion(nsDisplayListBuilder* aBuilder, const nsDisplayItemGeometry* aGeometry, nsRegion* aInvalidRegion) { const nsDisplaySVGEffectsGeometry* geometry = static_cast(aGeometry); bool snap; nsRect bounds = GetBounds(aBuilder, &snap); if (geometry->mFrameOffsetToReferenceFrame != ToReferenceFrame() || geometry->mUserSpaceOffset != UserSpaceOffset() || !geometry->mBBox.IsEqualInterior(BBoxInUserSpace())) { // Filter and mask output can depend on the location of the frame's user // space and on the frame's BBox. We need to invalidate if either of these // change relative to the reference frame. // Invalidations from our inactive layer manager are not enough to catch // some of these cases because filters can produce output even if there's // nothing in the filter input. aInvalidRegion->Or(bounds, geometry->mBounds); } } #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