mirror of
https://github.com/mozilla/gecko-dev.git
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6145 lines
231 KiB
C++
6145 lines
231 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "mozilla/DebugOnly.h"
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#include "FrameLayerBuilder.h"
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#include "mozilla/LookAndFeel.h"
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#include "mozilla/Maybe.h"
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#include "mozilla/dom/ProfileTimelineMarkerBinding.h"
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#include "mozilla/gfx/Matrix.h"
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#include "ActiveLayerTracker.h"
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#include "BasicLayers.h"
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#include "DisplayItemScrollClip.h"
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#include "ImageContainer.h"
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#include "ImageLayers.h"
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#include "LayerTreeInvalidation.h"
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#include "Layers.h"
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#include "LayerUserData.h"
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#include "MaskLayerImageCache.h"
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#include "UnitTransforms.h"
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#include "Units.h"
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#include "gfx2DGlue.h"
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#include "gfxEnv.h"
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#include "gfxUtils.h"
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#include "nsAutoPtr.h"
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#include "nsAnimationManager.h"
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#include "nsDisplayList.h"
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#include "nsDocShell.h"
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#include "nsIScrollableFrame.h"
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#include "nsImageFrame.h"
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#include "nsLayoutUtils.h"
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#include "nsPresContext.h"
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#include "nsPrintfCString.h"
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#include "nsRenderingContext.h"
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#include "nsSVGIntegrationUtils.h"
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#include "nsTransitionManager.h"
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#include "mozilla/LayerTimelineMarker.h"
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#include "mozilla/EffectCompositor.h"
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#include "mozilla/Move.h"
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#include "mozilla/ReverseIterator.h"
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#include "mozilla/gfx/2D.h"
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#include "mozilla/gfx/Tools.h"
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#include "mozilla/layers/ShadowLayers.h"
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#include "mozilla/layers/TextureClient.h"
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#include "mozilla/layers/TextureWrapperImage.h"
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#include "mozilla/unused.h"
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#include "GeckoProfiler.h"
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#include "LayersLogging.h"
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#include "gfxPrefs.h"
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#include <algorithm>
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using namespace mozilla::layers;
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using namespace mozilla::gfx;
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namespace mozilla {
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class PaintedDisplayItemLayerUserData;
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static nsTHashtable<nsPtrHashKey<FrameLayerBuilder::DisplayItemData>>* sAliveDisplayItemDatas;
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/**
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* The address of gPaintedDisplayItemLayerUserData is used as the user
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* data key for PaintedLayers created by FrameLayerBuilder.
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* It identifies PaintedLayers used to draw non-layer content, which are
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* therefore eligible for recycling. We want display items to be able to
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* create their own dedicated PaintedLayers in BuildLayer, if necessary,
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* and we wouldn't want to accidentally recycle those.
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* The user data is a PaintedDisplayItemLayerUserData.
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*/
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uint8_t gPaintedDisplayItemLayerUserData;
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/**
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* The address of gColorLayerUserData is used as the user
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* data key for ColorLayers created by FrameLayerBuilder.
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* The user data is null.
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*/
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uint8_t gColorLayerUserData;
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/**
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* The address of gImageLayerUserData is used as the user
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* data key for ImageLayers created by FrameLayerBuilder.
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* The user data is null.
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*/
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uint8_t gImageLayerUserData;
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/**
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* The address of gLayerManagerUserData is used as the user
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* data key for retained LayerManagers managed by FrameLayerBuilder.
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* The user data is a LayerManagerData.
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*/
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uint8_t gLayerManagerUserData;
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/**
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* The address of gMaskLayerUserData is used as the user
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* data key for mask layers managed by FrameLayerBuilder.
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* The user data is a MaskLayerUserData.
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*/
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uint8_t gMaskLayerUserData;
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// a global cache of image containers used for mask layers
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static MaskLayerImageCache* gMaskLayerImageCache = nullptr;
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static inline MaskLayerImageCache* GetMaskLayerImageCache()
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{
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if (!gMaskLayerImageCache) {
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gMaskLayerImageCache = new MaskLayerImageCache();
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}
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return gMaskLayerImageCache;
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}
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FrameLayerBuilder::FrameLayerBuilder()
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: mRetainingManager(nullptr)
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, mDetectedDOMModification(false)
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, mInvalidateAllLayers(false)
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, mInLayerTreeCompressionMode(false)
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, mContainerLayerGeneration(0)
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, mMaxContainerLayerGeneration(0)
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{
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MOZ_COUNT_CTOR(FrameLayerBuilder);
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}
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FrameLayerBuilder::~FrameLayerBuilder()
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{
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GetMaskLayerImageCache()->Sweep();
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MOZ_COUNT_DTOR(FrameLayerBuilder);
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}
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FrameLayerBuilder::DisplayItemData::DisplayItemData(LayerManagerData* aParent, uint32_t aKey,
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Layer* aLayer, nsIFrame* aFrame)
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: mParent(aParent)
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, mLayer(aLayer)
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, mDisplayItemKey(aKey)
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, mItem(nullptr)
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, mUsed(true)
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, mIsInvalid(false)
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{
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MOZ_COUNT_CTOR(FrameLayerBuilder::DisplayItemData);
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if (!sAliveDisplayItemDatas) {
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sAliveDisplayItemDatas = new nsTHashtable<nsPtrHashKey<FrameLayerBuilder::DisplayItemData>>();
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}
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MOZ_RELEASE_ASSERT(!sAliveDisplayItemDatas->Contains(this));
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sAliveDisplayItemDatas->PutEntry(this);
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MOZ_RELEASE_ASSERT(mLayer);
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if (aFrame) {
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AddFrame(aFrame);
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}
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}
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void
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FrameLayerBuilder::DisplayItemData::AddFrame(nsIFrame* aFrame)
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{
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MOZ_RELEASE_ASSERT(mLayer);
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mFrameList.AppendElement(aFrame);
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nsTArray<DisplayItemData*>* array =
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aFrame->Properties().Get(FrameLayerBuilder::LayerManagerDataProperty());
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if (!array) {
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array = new nsTArray<DisplayItemData*>();
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aFrame->Properties().Set(FrameLayerBuilder::LayerManagerDataProperty(), array);
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}
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array->AppendElement(this);
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}
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void
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FrameLayerBuilder::DisplayItemData::RemoveFrame(nsIFrame* aFrame)
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{
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MOZ_RELEASE_ASSERT(mLayer);
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bool result = mFrameList.RemoveElement(aFrame);
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MOZ_RELEASE_ASSERT(result, "Can't remove a frame that wasn't added!");
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nsTArray<DisplayItemData*>* array =
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aFrame->Properties().Get(FrameLayerBuilder::LayerManagerDataProperty());
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MOZ_RELEASE_ASSERT(array, "Must be already stored on the frame!");
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array->RemoveElement(this);
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}
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void
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FrameLayerBuilder::DisplayItemData::EndUpdate()
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{
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MOZ_RELEASE_ASSERT(mLayer);
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MOZ_ASSERT(!mItem);
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mIsInvalid = false;
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mUsed = false;
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}
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void
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FrameLayerBuilder::DisplayItemData::EndUpdate(nsAutoPtr<nsDisplayItemGeometry> aGeometry)
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{
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MOZ_RELEASE_ASSERT(mLayer);
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MOZ_ASSERT(mItem);
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MOZ_ASSERT(mGeometry || aGeometry);
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if (aGeometry) {
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mGeometry = aGeometry;
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}
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mClip = mItem->GetClip();
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mFrameListChanges.Clear();
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mItem = nullptr;
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EndUpdate();
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}
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void
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FrameLayerBuilder::DisplayItemData::BeginUpdate(Layer* aLayer, LayerState aState,
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uint32_t aContainerLayerGeneration,
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nsDisplayItem* aItem /* = nullptr */)
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{
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MOZ_RELEASE_ASSERT(mLayer);
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MOZ_RELEASE_ASSERT(aLayer);
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mLayer = aLayer;
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mOptLayer = nullptr;
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mInactiveManager = nullptr;
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mLayerState = aState;
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mContainerLayerGeneration = aContainerLayerGeneration;
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mUsed = true;
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if (aLayer->AsPaintedLayer()) {
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mItem = aItem;
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}
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if (!aItem) {
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return;
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}
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// We avoid adding or removing element unnecessarily
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// since we have to modify userdata each time
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AutoTArray<nsIFrame*, 4> copy(mFrameList);
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if (!copy.RemoveElement(aItem->Frame())) {
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AddFrame(aItem->Frame());
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mFrameListChanges.AppendElement(aItem->Frame());
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}
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AutoTArray<nsIFrame*,4> mergedFrames;
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aItem->GetMergedFrames(&mergedFrames);
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for (uint32_t i = 0; i < mergedFrames.Length(); ++i) {
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if (!copy.RemoveElement(mergedFrames[i])) {
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AddFrame(mergedFrames[i]);
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mFrameListChanges.AppendElement(mergedFrames[i]);
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}
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}
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for (uint32_t i = 0; i < copy.Length(); i++) {
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RemoveFrame(copy[i]);
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mFrameListChanges.AppendElement(copy[i]);
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}
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}
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static const nsIFrame* sDestroyedFrame = nullptr;
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FrameLayerBuilder::DisplayItemData::~DisplayItemData()
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{
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MOZ_COUNT_DTOR(FrameLayerBuilder::DisplayItemData);
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MOZ_RELEASE_ASSERT(mLayer);
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for (uint32_t i = 0; i < mFrameList.Length(); i++) {
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nsIFrame* frame = mFrameList[i];
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if (frame == sDestroyedFrame) {
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continue;
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}
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nsTArray<DisplayItemData*> *array =
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reinterpret_cast<nsTArray<DisplayItemData*>*>(frame->Properties().Get(LayerManagerDataProperty()));
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array->RemoveElement(this);
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}
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MOZ_RELEASE_ASSERT(sAliveDisplayItemDatas && sAliveDisplayItemDatas->Contains(this));
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sAliveDisplayItemDatas->RemoveEntry(this);
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if (sAliveDisplayItemDatas->Count() == 0) {
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delete sAliveDisplayItemDatas;
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sAliveDisplayItemDatas = nullptr;
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}
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}
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void
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FrameLayerBuilder::DisplayItemData::ClearAnimationCompositorState()
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{
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if (mDisplayItemKey != nsDisplayItem::TYPE_TRANSFORM &&
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mDisplayItemKey != nsDisplayItem::TYPE_OPACITY) {
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return;
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}
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for (nsIFrame* frame : mFrameList) {
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nsCSSProperty prop = mDisplayItemKey == nsDisplayItem::TYPE_TRANSFORM ?
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eCSSProperty_transform : eCSSProperty_opacity;
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EffectCompositor::ClearIsRunningOnCompositor(frame, prop);
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}
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}
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const nsTArray<nsIFrame*>&
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FrameLayerBuilder::DisplayItemData::GetFrameListChanges()
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{
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return mFrameListChanges;
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}
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/**
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* This is the userdata we associate with a layer manager.
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*/
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class LayerManagerData : public LayerUserData {
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public:
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explicit LayerManagerData(LayerManager *aManager)
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: mLayerManager(aManager)
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#ifdef DEBUG_DISPLAY_ITEM_DATA
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, mParent(nullptr)
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#endif
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, mInvalidateAllLayers(false)
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{
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MOZ_COUNT_CTOR(LayerManagerData);
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}
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~LayerManagerData() {
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MOZ_COUNT_DTOR(LayerManagerData);
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}
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#ifdef DEBUG_DISPLAY_ITEM_DATA
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void Dump(const char *aPrefix = "") {
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printf_stderr("%sLayerManagerData %p\n", aPrefix, this);
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for (auto iter = mDisplayItems.Iter(); !iter.Done(); iter.Next()) {
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FrameLayerBuilder::DisplayItemData* data = iter.Get()->GetKey();
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nsAutoCString prefix;
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prefix += aPrefix;
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prefix += " ";
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const char* layerState;
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switch (data->mLayerState) {
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case LAYER_NONE:
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layerState = "LAYER_NONE"; break;
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case LAYER_INACTIVE:
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layerState = "LAYER_INACTIVE"; break;
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case LAYER_ACTIVE:
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layerState = "LAYER_ACTIVE"; break;
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case LAYER_ACTIVE_FORCE:
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layerState = "LAYER_ACTIVE_FORCE"; break;
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case LAYER_ACTIVE_EMPTY:
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layerState = "LAYER_ACTIVE_EMPTY"; break;
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case LAYER_SVG_EFFECTS:
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layerState = "LAYER_SVG_EFFECTS"; break;
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}
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uint32_t mask = (1 << nsDisplayItem::TYPE_BITS) - 1;
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nsAutoCString str;
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str += prefix;
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str += nsPrintfCString("Frame %p ", data->mFrameList[0]);
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str += nsDisplayItem::DisplayItemTypeName(static_cast<nsDisplayItem::Type>(data->mDisplayItemKey & mask));
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if ((data->mDisplayItemKey >> nsDisplayItem::TYPE_BITS)) {
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str += nsPrintfCString("(%i)", data->mDisplayItemKey >> nsDisplayItem::TYPE_BITS);
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}
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str += nsPrintfCString(", %s, Layer %p", layerState, data->mLayer.get());
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if (data->mOptLayer) {
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str += nsPrintfCString(", OptLayer %p", data->mOptLayer.get());
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}
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if (data->mInactiveManager) {
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str += nsPrintfCString(", InactiveLayerManager %p", data->mInactiveManager.get());
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}
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str += "\n";
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printf_stderr("%s", str.get());
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if (data->mInactiveManager) {
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prefix += " ";
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printf_stderr("%sDumping inactive layer info:\n", prefix.get());
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LayerManagerData* lmd = static_cast<LayerManagerData*>
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(data->mInactiveManager->GetUserData(&gLayerManagerUserData));
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lmd->Dump(prefix.get());
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}
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}
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}
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#endif
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/**
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* Tracks which frames have layers associated with them.
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*/
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LayerManager *mLayerManager;
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#ifdef DEBUG_DISPLAY_ITEM_DATA
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LayerManagerData *mParent;
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#endif
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nsTHashtable<nsRefPtrHashKey<FrameLayerBuilder::DisplayItemData> > mDisplayItems;
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bool mInvalidateAllLayers;
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};
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/* static */ void
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FrameLayerBuilder::DestroyDisplayItemDataFor(nsIFrame* aFrame)
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{
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FrameProperties props = aFrame->Properties();
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props.Delete(LayerManagerDataProperty());
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}
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struct AssignedDisplayItem
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{
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AssignedDisplayItem(nsDisplayItem* aItem,
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const DisplayItemClip& aClip,
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LayerState aLayerState)
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: mItem(aItem)
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, mClip(aClip)
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, mLayerState(aLayerState)
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{}
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nsDisplayItem* mItem;
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DisplayItemClip mClip;
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LayerState mLayerState;
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};
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/**
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* We keep a stack of these to represent the PaintedLayers that are
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* currently available to have display items added to.
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* We use a stack here because as much as possible we want to
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* assign display items to existing PaintedLayers, and to the lowest
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* PaintedLayer in z-order. This reduces the number of layers and
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* makes it more likely a display item will be rendered to an opaque
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* layer, giving us the best chance of getting subpixel AA.
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*/
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class PaintedLayerData {
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public:
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PaintedLayerData() :
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mAnimatedGeometryRoot(nullptr),
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mScrollClip(nullptr),
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mReferenceFrame(nullptr),
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mLayer(nullptr),
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mSolidColor(NS_RGBA(0, 0, 0, 0)),
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mIsSolidColorInVisibleRegion(false),
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mFontSmoothingBackgroundColor(NS_RGBA(0,0,0,0)),
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mClipMovesWithLayer(true),
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mIsCaret(false),
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mNeedComponentAlpha(false),
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mForceTransparentSurface(false),
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mHideAllLayersBelow(false),
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mOpaqueForAnimatedGeometryRootParent(false),
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mDisableFlattening(false),
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mBackfaceHidden(false),
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mImage(nullptr),
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mCommonClipCount(-1),
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mNewChildLayersIndex(-1)
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{}
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#ifdef MOZ_DUMP_PAINTING
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/**
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* Keep track of important decisions for debugging.
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*/
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nsCString mLog;
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#define FLB_LOG_PAINTED_LAYER_DECISION(pld, ...) \
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if (gfxPrefs::LayersDumpDecision()) { \
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pld->mLog.AppendPrintf("\t\t\t\t"); \
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pld->mLog.AppendPrintf(__VA_ARGS__); \
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}
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#else
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#define FLB_LOG_PAINTED_LAYER_DECISION(...)
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#endif
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|
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/**
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* Record that an item has been added to the PaintedLayer, so we
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* need to update our regions.
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* @param aVisibleRect the area of the item that's visible
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* @param aSolidColor if non-null, the visible area of the item is
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* a constant color given by *aSolidColor
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*/
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void Accumulate(ContainerState* aState,
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nsDisplayItem* aItem,
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const nsIntRegion& aClippedOpaqueRegion,
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const nsIntRect& aVisibleRect,
|
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const DisplayItemClip& aClip,
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LayerState aLayerState);
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AnimatedGeometryRoot* GetAnimatedGeometryRoot() { return mAnimatedGeometryRoot; }
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|
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/**
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* A region including the horizontal pan, vertical pan, and no action regions.
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*/
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|
nsRegion CombinedTouchActionRegion();
|
|
|
|
/**
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|
* Add the given hit regions to the hit regions to the hit retions for this
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* PaintedLayer.
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*/
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void AccumulateEventRegions(ContainerState* aState, nsDisplayLayerEventRegions* aEventRegions);
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|
|
/**
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* If this represents only a nsDisplayImage, and the image type supports being
|
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* optimized to an ImageLayer, returns true.
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*/
|
|
bool CanOptimizeToImageLayer(nsDisplayListBuilder* aBuilder);
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|
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/**
|
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* If this represents only a nsDisplayImage, and the image type supports being
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* optimized to an ImageLayer, returns an ImageContainer for the underlying
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* image if one is available.
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*/
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already_AddRefed<ImageContainer> GetContainerForImageLayer(nsDisplayListBuilder* aBuilder);
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bool VisibleAboveRegionIntersects(const nsIntRegion& aRegion) const
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{ return !mVisibleAboveRegion.Intersect(aRegion).IsEmpty(); }
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bool VisibleRegionIntersects(const nsIntRegion& aRegion) const
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|
{ return !mVisibleRegion.Intersect(aRegion).IsEmpty(); }
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|
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/**
|
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* The region of visible content in the layer, relative to the
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* container layer (which is at the snapped top-left of the display
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* list reference frame).
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*/
|
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nsIntRegion mVisibleRegion;
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|
/**
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* The region of visible content in the layer that is opaque.
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|
* Same coordinate system as mVisibleRegion.
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*/
|
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nsIntRegion mOpaqueRegion;
|
|
/**
|
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* The definitely-hit region for this PaintedLayer.
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*/
|
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nsRegion mHitRegion;
|
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/**
|
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* The maybe-hit region for this PaintedLayer.
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*/
|
|
nsRegion mMaybeHitRegion;
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/**
|
|
* The dispatch-to-content hit region for this PaintedLayer.
|
|
*/
|
|
nsRegion mDispatchToContentHitRegion;
|
|
/**
|
|
* The region for this PaintedLayer that is sensitive to events
|
|
* but disallows panning and zooming. This is an approximation
|
|
* and any deviation from the true region will be part of the
|
|
* mDispatchToContentHitRegion.
|
|
*/
|
|
nsRegion mNoActionRegion;
|
|
/**
|
|
* The region for this PaintedLayer that is sensitive to events and
|
|
* allows horizontal panning but not zooming. This is an approximation
|
|
* and any deviation from the true region will be part of the
|
|
* mDispatchToContentHitRegion.
|
|
*/
|
|
nsRegion mHorizontalPanRegion;
|
|
/**
|
|
* The region for this PaintedLayer that is sensitive to events and
|
|
* allows vertical panning but not zooming. This is an approximation
|
|
* and any deviation from the true region will be part of the
|
|
* mDispatchToContentHitRegion.
|
|
*/
|
|
nsRegion mVerticalPanRegion;
|
|
/**
|
|
* Scaled versions of the bounds of mHitRegion and mMaybeHitRegion.
|
|
* We store these because FindPaintedLayerFor() needs to consume them
|
|
* in this form, and it's a hot code path so we don't want to scale
|
|
* them inside that function.
|
|
*/
|
|
nsIntRect mScaledHitRegionBounds;
|
|
nsIntRect mScaledMaybeHitRegionBounds;
|
|
/**
|
|
* The "active scrolled root" for all content in the layer. Must
|
|
* be non-null; all content in a PaintedLayer must have the same
|
|
* active scrolled root.
|
|
*/
|
|
AnimatedGeometryRoot* mAnimatedGeometryRoot;
|
|
/**
|
|
* The scroll clip for this layer.
|
|
*/
|
|
const DisplayItemScrollClip* mScrollClip;
|
|
/**
|
|
* The offset between mAnimatedGeometryRoot and the reference frame.
|
|
*/
|
|
nsPoint mAnimatedGeometryRootOffset;
|
|
/**
|
|
* If non-null, the frame from which we'll extract "fixed positioning"
|
|
* metadata for this layer. This can be a position:fixed frame or a viewport
|
|
* frame; the latter case is used for background-attachment:fixed content.
|
|
*/
|
|
const nsIFrame* mReferenceFrame;
|
|
PaintedLayer* mLayer;
|
|
/**
|
|
* If mIsSolidColorInVisibleRegion is true, this is the color of the visible
|
|
* region.
|
|
*/
|
|
nscolor mSolidColor;
|
|
/**
|
|
* True if every pixel in mVisibleRegion will have color mSolidColor.
|
|
*/
|
|
bool mIsSolidColorInVisibleRegion;
|
|
/**
|
|
* The target background color for smoothing fonts that are drawn on top of
|
|
* transparent parts of the layer.
|
|
*/
|
|
nscolor mFontSmoothingBackgroundColor;
|
|
/**
|
|
* True unless the layer contains exactly one item whose clip scrolls
|
|
* relative to the layer rather than moving with the layer.
|
|
*/
|
|
bool mClipMovesWithLayer;
|
|
/**
|
|
* True if the layer contains exactly one item for the caret.
|
|
*/
|
|
bool mIsCaret;
|
|
/**
|
|
* True if there is any text visible in the layer that's over
|
|
* transparent pixels in the layer.
|
|
*/
|
|
bool mNeedComponentAlpha;
|
|
/**
|
|
* Set if the layer should be treated as transparent, even if its entire
|
|
* area is covered by opaque display items. For example, this needs to
|
|
* be set if something is going to "punch holes" in the layer by clearing
|
|
* part of its surface.
|
|
*/
|
|
bool mForceTransparentSurface;
|
|
/**
|
|
* Set if all layers below this PaintedLayer should be hidden.
|
|
*/
|
|
bool mHideAllLayersBelow;
|
|
/**
|
|
* Set if the opaque region for this layer can be applied to the parent
|
|
* animated geometry root of this layer's animated geometry root.
|
|
* We set this when a PaintedLayer's animated geometry root is a scrollframe
|
|
* and the PaintedLayer completely fills the displayport of the scrollframe.
|
|
*/
|
|
bool mOpaqueForAnimatedGeometryRootParent;
|
|
/**
|
|
* Set if there is content in the layer that must avoid being flattened.
|
|
*/
|
|
bool mDisableFlattening;
|
|
/**
|
|
* Set if the backface of this region is hidden to the user.
|
|
* Content that backface is hidden should not be draw on the layer
|
|
* with visible backface.
|
|
*/
|
|
bool mBackfaceHidden;
|
|
/**
|
|
* Stores the pointer to the nsDisplayImage if we want to
|
|
* convert this to an ImageLayer.
|
|
*/
|
|
nsDisplayImageContainer* mImage;
|
|
/**
|
|
* Stores the clip that we need to apply to the image or, if there is no
|
|
* image, a clip for SOME item in the layer. There is no guarantee which
|
|
* item's clip will be stored here and mItemClip should not be used to clip
|
|
* the whole layer - only some part of the clip should be used, as determined
|
|
* by PaintedDisplayItemLayerUserData::GetCommonClipCount() - which may even be
|
|
* no part at all.
|
|
*/
|
|
DisplayItemClip mItemClip;
|
|
/**
|
|
* The first mCommonClipCount rounded rectangle clips are identical for
|
|
* all items in the layer.
|
|
* -1 if there are no items in the layer; must be >=0 by the time that this
|
|
* data is popped from the stack.
|
|
*/
|
|
int32_t mCommonClipCount;
|
|
/**
|
|
* Index of this layer in mNewChildLayers.
|
|
*/
|
|
int32_t mNewChildLayersIndex;
|
|
/*
|
|
* Updates mCommonClipCount by checking for rounded rect clips in common
|
|
* between the clip on a new item (aCurrentClip) and the common clips
|
|
* on items already in the layer (the first mCommonClipCount rounded rects
|
|
* in mItemClip).
|
|
*/
|
|
void UpdateCommonClipCount(const DisplayItemClip& aCurrentClip);
|
|
/**
|
|
* The union of all the bounds of the display items in this layer.
|
|
*/
|
|
nsIntRect mBounds;
|
|
/**
|
|
* The region of visible content above the layer and below the
|
|
* next PaintedLayerData currently in the stack, if any.
|
|
* This is a conservative approximation: it contains the true region.
|
|
*/
|
|
nsIntRegion mVisibleAboveRegion;
|
|
/**
|
|
* All the display items that have been assigned to this painted layer.
|
|
* These items get added by Accumulate().
|
|
*/
|
|
nsTArray<AssignedDisplayItem> mAssignedDisplayItems;
|
|
|
|
};
|
|
|
|
struct NewLayerEntry {
|
|
NewLayerEntry()
|
|
: mAnimatedGeometryRoot(nullptr)
|
|
, mScrollClip(nullptr)
|
|
, mLayerContentsVisibleRect(0, 0, -1, -1)
|
|
, mLayerState(LAYER_INACTIVE)
|
|
, mHideAllLayersBelow(false)
|
|
, mOpaqueForAnimatedGeometryRootParent(false)
|
|
, mPropagateComponentAlphaFlattening(true)
|
|
, mUntransformedVisibleRegion(false)
|
|
, mIsCaret(false)
|
|
, mIsPerspectiveItem(false)
|
|
{}
|
|
// mLayer is null if the previous entry is for a PaintedLayer that hasn't
|
|
// been optimized to some other form (yet).
|
|
RefPtr<Layer> mLayer;
|
|
AnimatedGeometryRoot* mAnimatedGeometryRoot;
|
|
const DisplayItemScrollClip* mScrollClip;
|
|
// If non-null, this ScrollMetadata is set to the be the first ScrollMetadata
|
|
// on the layer.
|
|
UniquePtr<ScrollMetadata> mBaseScrollMetadata;
|
|
// The following are only used for retained layers (for occlusion
|
|
// culling of those layers). These regions are all relative to the
|
|
// container reference frame.
|
|
nsIntRegion mVisibleRegion;
|
|
nsIntRegion mOpaqueRegion;
|
|
// This rect is in the layer's own coordinate space. The computed visible
|
|
// region for the layer cannot extend beyond this rect.
|
|
nsIntRect mLayerContentsVisibleRect;
|
|
LayerState mLayerState;
|
|
bool mHideAllLayersBelow;
|
|
// When mOpaqueForAnimatedGeometryRootParent is true, the opaque region of
|
|
// this layer is opaque in the same position even subject to the animation of
|
|
// geometry of mAnimatedGeometryRoot. For example when mAnimatedGeometryRoot
|
|
// is a scrolled frame and the scrolled content is opaque everywhere in the
|
|
// displayport, we can set this flag.
|
|
// When this flag is set, we can treat this opaque region as covering
|
|
// content whose animated geometry root is the animated geometry root for
|
|
// mAnimatedGeometryRoot->GetParent().
|
|
bool mOpaqueForAnimatedGeometryRootParent;
|
|
|
|
// If true, then the content flags for this layer should contribute
|
|
// to our decision to flatten component alpha layers, false otherwise.
|
|
bool mPropagateComponentAlphaFlattening;
|
|
// mVisibleRegion is relative to the associated frame before
|
|
// transform.
|
|
bool mUntransformedVisibleRegion;
|
|
bool mIsCaret;
|
|
bool mIsPerspectiveItem;
|
|
};
|
|
|
|
class PaintedLayerDataTree;
|
|
|
|
/**
|
|
* This is tree node type for PaintedLayerDataTree.
|
|
* Each node corresponds to a different animated geometry root, and contains
|
|
* a stack of PaintedLayerDatas, in bottom-to-top order.
|
|
* There is at most one node per animated geometry root. The ancestor and
|
|
* descendant relations in PaintedLayerDataTree tree mirror those in the frame
|
|
* tree.
|
|
* Each node can have clip that describes the potential extents that items in
|
|
* this node can cover. If mHasClip is false, it means that the node's contents
|
|
* can move anywhere.
|
|
* Testing against the clip instead of the node's actual contents has the
|
|
* advantage that the node's contents can move or animate without affecting
|
|
* content in other nodes. So we don't need to re-layerize during animations
|
|
* (sync or async), and during async animations everything is guaranteed to
|
|
* look correct.
|
|
* The contents of a node's PaintedLayerData stack all share the node's
|
|
* animated geometry root. The child nodes are on top of the PaintedLayerData
|
|
* stack, in z-order, and the clip rects of the child nodes are allowed to
|
|
* intersect with the visible region or visible above region of their parent
|
|
* node's PaintedLayerDatas.
|
|
*/
|
|
class PaintedLayerDataNode {
|
|
public:
|
|
PaintedLayerDataNode(PaintedLayerDataTree& aTree,
|
|
PaintedLayerDataNode* aParent,
|
|
AnimatedGeometryRoot* aAnimatedGeometryRoot);
|
|
~PaintedLayerDataNode();
|
|
|
|
AnimatedGeometryRoot* GetAnimatedGeometryRoot() const { return mAnimatedGeometryRoot; }
|
|
|
|
/**
|
|
* Whether this node's contents can potentially intersect aRect.
|
|
* aRect is in our tree's ContainerState's coordinate space.
|
|
*/
|
|
bool Intersects(const nsIntRect& aRect) const
|
|
{ return !mHasClip || mClipRect.Intersects(aRect); }
|
|
|
|
/**
|
|
* Create a PaintedLayerDataNode for aAnimatedGeometryRoot, add it to our
|
|
* children, and return it.
|
|
*/
|
|
PaintedLayerDataNode* AddChildNodeFor(AnimatedGeometryRoot* aAnimatedGeometryRoot);
|
|
|
|
/**
|
|
* Find a PaintedLayerData in our mPaintedLayerDataStack that aItem can be
|
|
* added to. Creates a new PaintedLayerData by calling
|
|
* aNewPaintedLayerCallback if necessary.
|
|
*/
|
|
template<typename NewPaintedLayerCallbackType>
|
|
PaintedLayerData* FindPaintedLayerFor(const nsIntRect& aVisibleRect,
|
|
bool aBackfaceHidden,
|
|
const DisplayItemScrollClip* aScrollClip,
|
|
NewPaintedLayerCallbackType aNewPaintedLayerCallback);
|
|
|
|
/**
|
|
* Find an opaque background color for aRegion. Pulls a color from the parent
|
|
* geometry root if appropriate, but only if that color is present underneath
|
|
* the whole clip of this node, so that this node's contents can animate or
|
|
* move (possibly async) without having to change the background color.
|
|
* @param aUnderIndex Searching will start in mPaintedLayerDataStack right
|
|
* below aUnderIndex.
|
|
*/
|
|
enum { ABOVE_TOP = -1 };
|
|
nscolor FindOpaqueBackgroundColor(const nsIntRegion& aRegion,
|
|
int32_t aUnderIndex = ABOVE_TOP) const;
|
|
/**
|
|
* Same as FindOpaqueBackgroundColor, but only returns a color if absolutely
|
|
* nothing is in between, so that it can be used for a layer that can move
|
|
* anywhere inside our clip.
|
|
*/
|
|
nscolor FindOpaqueBackgroundColorCoveringEverything() const;
|
|
|
|
/**
|
|
* Adds aRect to this node's top PaintedLayerData's mVisibleAboveRegion,
|
|
* or mVisibleAboveBackgroundRegion if mPaintedLayerDataStack is empty.
|
|
*/
|
|
void AddToVisibleAboveRegion(const nsIntRect& aRect);
|
|
/**
|
|
* Call this if all of our existing content can potentially be covered, so
|
|
* nothing can merge with it and all new content needs to create new items
|
|
* on top. This will finish all of our children and pop our whole
|
|
* mPaintedLayerDataStack.
|
|
*/
|
|
void SetAllDrawingAbove();
|
|
|
|
/**
|
|
* Finish this node: Finish all children, finish our PaintedLayer contents,
|
|
* and (if requested) adjust our parent's visible above region to include
|
|
* our clip.
|
|
*/
|
|
void Finish(bool aParentNeedsAccurateVisibleAboveRegion);
|
|
|
|
/**
|
|
* Finish any children that intersect aRect.
|
|
*/
|
|
void FinishChildrenIntersecting(const nsIntRect& aRect);
|
|
|
|
/**
|
|
* Finish all children.
|
|
*/
|
|
void FinishAllChildren() { FinishAllChildren(true); }
|
|
|
|
protected:
|
|
/**
|
|
* Finish the topmost item in mPaintedLayerDataStack and pop it from the
|
|
* stack.
|
|
*/
|
|
void PopPaintedLayerData();
|
|
/**
|
|
* Finish all items in mPaintedLayerDataStack and clear the stack.
|
|
*/
|
|
void PopAllPaintedLayerData();
|
|
/**
|
|
* Finish all of our child nodes, but don't touch mPaintedLayerDataStack.
|
|
*/
|
|
void FinishAllChildren(bool aThisNodeNeedsAccurateVisibleAboveRegion);
|
|
/**
|
|
* Pass off opaque background color searching to our parent node, if we have
|
|
* one.
|
|
*/
|
|
nscolor FindOpaqueBackgroundColorInParentNode() const;
|
|
|
|
PaintedLayerDataTree& mTree;
|
|
PaintedLayerDataNode* mParent;
|
|
AnimatedGeometryRoot* mAnimatedGeometryRoot;
|
|
|
|
/**
|
|
* Our contents: a PaintedLayerData stack and our child nodes.
|
|
*/
|
|
nsTArray<PaintedLayerData> mPaintedLayerDataStack;
|
|
|
|
/**
|
|
* UniquePtr is used here in the sense of "unique ownership", i.e. there is
|
|
* only one owner. Not in the sense of "this is the only pointer to the
|
|
* node": There are two other, non-owning, pointers to our child nodes: The
|
|
* node's respective children point to their parent node with their mParent
|
|
* pointer, and the tree keeps a map of animated geometry root to node in its
|
|
* mNodes member. These outside pointers are the reason that mChildren isn't
|
|
* just an nsTArray<PaintedLayerDataNode> (since the pointers would become
|
|
* invalid whenever the array expands its capacity).
|
|
*/
|
|
nsTArray<UniquePtr<PaintedLayerDataNode>> mChildren;
|
|
|
|
/**
|
|
* The region that's covered between our "background" and the bottom of
|
|
* mPaintedLayerDataStack. This is used to indicate whether we can pull
|
|
* a background color from our parent node. If mVisibleAboveBackgroundRegion
|
|
* should be considered infinite, mAllDrawingAboveBackground will be true and
|
|
* the value of mVisibleAboveBackgroundRegion will be meaningless.
|
|
*/
|
|
nsIntRegion mVisibleAboveBackgroundRegion;
|
|
|
|
/**
|
|
* Our clip, if we have any. If not, that means we can move anywhere, and
|
|
* mHasClip will be false and mClipRect will be meaningless.
|
|
*/
|
|
nsIntRect mClipRect;
|
|
bool mHasClip;
|
|
|
|
/**
|
|
* Whether mVisibleAboveBackgroundRegion should be considered infinite.
|
|
*/
|
|
bool mAllDrawingAboveBackground;
|
|
};
|
|
|
|
class ContainerState;
|
|
|
|
/**
|
|
* A tree of PaintedLayerDataNodes. At any point in time, the tree only
|
|
* contains nodes for animated geometry roots that new items can potentially
|
|
* merge into. Any time content is added on top that overlaps existing things
|
|
* in such a way that we no longer want to merge new items with some existing
|
|
* content, that existing content gets "finished".
|
|
* The public-facing methods of this class are FindPaintedLayerFor,
|
|
* AddingOwnLayer, and Finish. The other public methods are for
|
|
* PaintedLayerDataNode.
|
|
* The tree calls out to its containing ContainerState for some things.
|
|
* All coordinates / rects in the tree or the tree nodes are in the
|
|
* ContainerState's coordinate space, i.e. relative to the reference frame and
|
|
* in layer pixels.
|
|
* The clip rects of sibling nodes never overlap. This is ensured by finishing
|
|
* existing nodes before adding new ones, if this property were to be violated.
|
|
* The root tree node doesn't get finished until the ContainerState is
|
|
* finished.
|
|
* The tree's root node is always the root reference frame of the builder. We
|
|
* don't stop at the container state's mContainerAnimatedGeometryRoot because
|
|
* some of our contents can have animated geometry roots that are not
|
|
* descendants of the container's animated geometry root. Every animated
|
|
* geometry root we encounter for our contents needs to have a defined place in
|
|
* the tree.
|
|
*/
|
|
class PaintedLayerDataTree {
|
|
public:
|
|
PaintedLayerDataTree(ContainerState& aContainerState,
|
|
nscolor& aBackgroundColor)
|
|
: mContainerState(aContainerState)
|
|
, mContainerUniformBackgroundColor(aBackgroundColor)
|
|
{}
|
|
|
|
~PaintedLayerDataTree()
|
|
{
|
|
MOZ_ASSERT(!mRoot);
|
|
MOZ_ASSERT(mNodes.Count() == 0);
|
|
}
|
|
|
|
/**
|
|
* Notify our contents that some non-PaintedLayer content has been added.
|
|
* *aRect needs to be a rectangle that doesn't move with respect to
|
|
* aAnimatedGeometryRoot and that contains the added item.
|
|
* If aRect is null, the extents will be considered infinite.
|
|
* If aOutUniformBackgroundColor is non-null, it will be set to an opaque
|
|
* color that can be pulled into the background of the added content, or
|
|
* transparent if that is not possible.
|
|
*/
|
|
void AddingOwnLayer(AnimatedGeometryRoot* aAnimatedGeometryRoot,
|
|
const nsIntRect* aRect,
|
|
nscolor* aOutUniformBackgroundColor);
|
|
|
|
/**
|
|
* Find a PaintedLayerData for aItem. This can either be an existing
|
|
* PaintedLayerData from inside a node in our tree, or a new one that gets
|
|
* created by a call out to aNewPaintedLayerCallback.
|
|
*/
|
|
template<typename NewPaintedLayerCallbackType>
|
|
PaintedLayerData* FindPaintedLayerFor(AnimatedGeometryRoot* aAnimatedGeometryRoot,
|
|
const DisplayItemScrollClip* aScrollClip,
|
|
const nsIntRect& aVisibleRect,
|
|
bool aBackfaceidden,
|
|
NewPaintedLayerCallbackType aNewPaintedLayerCallback);
|
|
|
|
/**
|
|
* Finish everything.
|
|
*/
|
|
void Finish();
|
|
|
|
/**
|
|
* Get the parent animated geometry root of aAnimatedGeometryRoot.
|
|
* That's either aAnimatedGeometryRoot's animated geometry root, or, if
|
|
* that's aAnimatedGeometryRoot itself, then it's the animated geometry
|
|
* root for aAnimatedGeometryRoot's cross-doc parent frame.
|
|
*/
|
|
AnimatedGeometryRoot* GetParentAnimatedGeometryRoot(AnimatedGeometryRoot* aAnimatedGeometryRoot);
|
|
|
|
/**
|
|
* Whether aAnimatedGeometryRoot has an intrinsic clip that doesn't move with
|
|
* respect to aAnimatedGeometryRoot's parent animated geometry root.
|
|
* If aAnimatedGeometryRoot is a scroll frame, this will be the scroll frame's
|
|
* scroll port, otherwise there is no clip.
|
|
* This method doesn't have much to do with PaintedLayerDataTree, but this is
|
|
* where we have easy access to a display list builder, which we use to get
|
|
* the clip rect result into the right coordinate space.
|
|
*/
|
|
bool IsClippedWithRespectToParentAnimatedGeometryRoot(AnimatedGeometryRoot* aAnimatedGeometryRoot,
|
|
nsIntRect* aOutClip);
|
|
|
|
/**
|
|
* Called by PaintedLayerDataNode when it is finished, so that we can drop
|
|
* our pointers to it.
|
|
*/
|
|
void NodeWasFinished(AnimatedGeometryRoot* aAnimatedGeometryRoot);
|
|
|
|
nsDisplayListBuilder* Builder() const;
|
|
ContainerState& ContState() const { return mContainerState; }
|
|
nscolor UniformBackgroundColor() const { return mContainerUniformBackgroundColor; }
|
|
|
|
protected:
|
|
/**
|
|
* Finish all nodes that potentially intersect *aRect, where *aRect is a rect
|
|
* that doesn't move with respect to aAnimatedGeometryRoot.
|
|
* If aRect is null, *aRect will be considered infinite.
|
|
*/
|
|
void FinishPotentiallyIntersectingNodes(AnimatedGeometryRoot* aAnimatedGeometryRoot,
|
|
const nsIntRect* aRect);
|
|
|
|
/**
|
|
* Make sure that there is a node for aAnimatedGeometryRoot and all of its
|
|
* ancestor geometry roots. Return the node for aAnimatedGeometryRoot.
|
|
*/
|
|
PaintedLayerDataNode* EnsureNodeFor(AnimatedGeometryRoot* aAnimatedGeometryRoot);
|
|
|
|
/**
|
|
* Find an existing node in the tree for an ancestor of aAnimatedGeometryRoot.
|
|
* *aOutAncestorChild will be set to the last ancestor that was encountered
|
|
* in the search up from aAnimatedGeometryRoot; it will be a child animated
|
|
* geometry root of the result, if neither are null.
|
|
*/
|
|
PaintedLayerDataNode*
|
|
FindNodeForAncestorAnimatedGeometryRoot(AnimatedGeometryRoot* aAnimatedGeometryRoot,
|
|
AnimatedGeometryRoot** aOutAncestorChild);
|
|
|
|
ContainerState& mContainerState;
|
|
UniquePtr<PaintedLayerDataNode> mRoot;
|
|
|
|
/**
|
|
* The uniform opaque color from behind this container layer, or
|
|
* NS_RGBA(0,0,0,0) if the background behind this container layer is not
|
|
* uniform and opaque. This color can be pulled into PaintedLayers that are
|
|
* directly above the background.
|
|
*/
|
|
nscolor mContainerUniformBackgroundColor;
|
|
|
|
/**
|
|
* A hash map for quick access the node belonging to a particular animated
|
|
* geometry root.
|
|
*/
|
|
nsDataHashtable<nsPtrHashKey<AnimatedGeometryRoot>, PaintedLayerDataNode*> mNodes;
|
|
};
|
|
|
|
/**
|
|
* This is a helper object used to build up the layer children for
|
|
* a ContainerLayer.
|
|
*/
|
|
class ContainerState {
|
|
public:
|
|
ContainerState(nsDisplayListBuilder* aBuilder,
|
|
LayerManager* aManager,
|
|
FrameLayerBuilder* aLayerBuilder,
|
|
nsIFrame* aContainerFrame,
|
|
nsDisplayItem* aContainerItem,
|
|
const nsRect& aContainerBounds,
|
|
ContainerLayer* aContainerLayer,
|
|
const ContainerLayerParameters& aParameters,
|
|
bool aFlattenToSingleLayer,
|
|
nscolor aBackgroundColor,
|
|
const DisplayItemScrollClip* aContainerScrollClip) :
|
|
mBuilder(aBuilder), mManager(aManager),
|
|
mLayerBuilder(aLayerBuilder),
|
|
mContainerFrame(aContainerFrame),
|
|
mContainerLayer(aContainerLayer),
|
|
mContainerBounds(aContainerBounds),
|
|
mContainerScrollClip(aContainerScrollClip),
|
|
mScrollClipForPerspectiveChild(aParameters.mScrollClipForPerspectiveChild),
|
|
mParameters(aParameters),
|
|
mPaintedLayerDataTree(*this, aBackgroundColor),
|
|
mFlattenToSingleLayer(aFlattenToSingleLayer)
|
|
{
|
|
nsPresContext* presContext = aContainerFrame->PresContext();
|
|
mAppUnitsPerDevPixel = presContext->AppUnitsPerDevPixel();
|
|
mContainerReferenceFrame =
|
|
const_cast<nsIFrame*>(aContainerItem ? aContainerItem->ReferenceFrameForChildren() :
|
|
mBuilder->FindReferenceFrameFor(mContainerFrame));
|
|
bool isAtRoot = !aContainerItem || (aContainerItem->Frame() == mBuilder->RootReferenceFrame());
|
|
MOZ_ASSERT_IF(isAtRoot, mContainerReferenceFrame == mBuilder->RootReferenceFrame());
|
|
mContainerAnimatedGeometryRoot = isAtRoot
|
|
? aBuilder->GetRootAnimatedGeometryRoot()
|
|
: aContainerItem->GetAnimatedGeometryRoot();
|
|
MOZ_ASSERT(!mBuilder->IsPaintingToWindow() ||
|
|
nsLayoutUtils::IsAncestorFrameCrossDoc(mBuilder->RootReferenceFrame(),
|
|
*mContainerAnimatedGeometryRoot));
|
|
// When AllowResidualTranslation is false, display items will be drawn
|
|
// scaled with a translation by integer pixels, so we know how the snapping
|
|
// will work.
|
|
mSnappingEnabled = aManager->IsSnappingEffectiveTransforms() &&
|
|
!mParameters.AllowResidualTranslation();
|
|
CollectOldLayers();
|
|
}
|
|
|
|
/**
|
|
* This is the method that actually walks a display list and builds
|
|
* the child layers.
|
|
*/
|
|
void ProcessDisplayItems(nsDisplayList* aList);
|
|
/**
|
|
* This finalizes all the open PaintedLayers by popping every element off
|
|
* mPaintedLayerDataStack, then sets the children of the container layer
|
|
* to be all the layers in mNewChildLayers in that order and removes any
|
|
* layers as children of the container that aren't in mNewChildLayers.
|
|
* @param aTextContentFlags if any child layer has CONTENT_COMPONENT_ALPHA,
|
|
* set *aTextContentFlags to CONTENT_COMPONENT_ALPHA
|
|
*/
|
|
void Finish(uint32_t *aTextContentFlags,
|
|
const nsIntRect& aContainerPixelBounds,
|
|
nsDisplayList* aChildItems, bool* aHasComponentAlphaChildren);
|
|
|
|
nscoord GetAppUnitsPerDevPixel() { return mAppUnitsPerDevPixel; }
|
|
|
|
nsIntRect ScaleToNearestPixels(const nsRect& aRect) const
|
|
{
|
|
return aRect.ScaleToNearestPixels(mParameters.mXScale, mParameters.mYScale,
|
|
mAppUnitsPerDevPixel);
|
|
}
|
|
nsIntRegion ScaleRegionToNearestPixels(const nsRegion& aRegion) const
|
|
{
|
|
return aRegion.ScaleToNearestPixels(mParameters.mXScale, mParameters.mYScale,
|
|
mAppUnitsPerDevPixel);
|
|
}
|
|
nsIntRect ScaleToOutsidePixels(const nsRect& aRect, bool aSnap = false) const
|
|
{
|
|
if (aSnap && mSnappingEnabled) {
|
|
return ScaleToNearestPixels(aRect);
|
|
}
|
|
return aRect.ScaleToOutsidePixels(mParameters.mXScale, mParameters.mYScale,
|
|
mAppUnitsPerDevPixel);
|
|
}
|
|
nsIntRect ScaleToInsidePixels(const nsRect& aRect, bool aSnap = false) const
|
|
{
|
|
if (aSnap && mSnappingEnabled) {
|
|
return ScaleToNearestPixels(aRect);
|
|
}
|
|
return aRect.ScaleToInsidePixels(mParameters.mXScale, mParameters.mYScale,
|
|
mAppUnitsPerDevPixel);
|
|
}
|
|
|
|
nsIntRegion ScaleRegionToInsidePixels(const nsRegion& aRegion, bool aSnap = false) const
|
|
{
|
|
if (aSnap && mSnappingEnabled) {
|
|
return ScaleRegionToNearestPixels(aRegion);
|
|
}
|
|
return aRegion.ScaleToInsidePixels(mParameters.mXScale, mParameters.mYScale,
|
|
mAppUnitsPerDevPixel);
|
|
}
|
|
|
|
nsIntRegion ScaleRegionToOutsidePixels(const nsRegion& aRegion, bool aSnap = false) const
|
|
{
|
|
if (aSnap && mSnappingEnabled) {
|
|
return ScaleRegionToNearestPixels(aRegion);
|
|
}
|
|
return aRegion.ScaleToOutsidePixels(mParameters.mXScale, mParameters.mYScale,
|
|
mAppUnitsPerDevPixel);
|
|
}
|
|
|
|
nsIFrame* GetContainerFrame() const { return mContainerFrame; }
|
|
nsDisplayListBuilder* Builder() const { return mBuilder; }
|
|
|
|
/**
|
|
* Check if we are currently inside an inactive layer.
|
|
*/
|
|
bool IsInInactiveLayer() const {
|
|
return mLayerBuilder->GetContainingPaintedLayerData();
|
|
}
|
|
|
|
/**
|
|
* Sets aOuterVisibleRegion as aLayer's visible region.
|
|
* @param aOuterVisibleRegion
|
|
* is in the coordinate space of the container reference frame.
|
|
* @param aLayerContentsVisibleRect, if non-null, is in the layer's own
|
|
* coordinate system.
|
|
* @param aOuterUntransformed is true if the given aOuterVisibleRegion
|
|
* is already untransformed with the matrix of the layer.
|
|
*/
|
|
void SetOuterVisibleRegionForLayer(Layer* aLayer,
|
|
const nsIntRegion& aOuterVisibleRegion,
|
|
const nsIntRect* aLayerContentsVisibleRect = nullptr,
|
|
bool aOuterUntransformed = false) const;
|
|
|
|
/**
|
|
* Try to determine whether the PaintedLayer aData has a single opaque color
|
|
* covering aRect. If successful, return that color, otherwise return
|
|
* NS_RGBA(0,0,0,0).
|
|
* If aRect turns out not to intersect any content in the layer,
|
|
* *aOutIntersectsLayer will be set to false.
|
|
*/
|
|
nscolor FindOpaqueBackgroundColorInLayer(const PaintedLayerData* aData,
|
|
const nsIntRect& aRect,
|
|
bool* aOutIntersectsLayer) const;
|
|
|
|
/**
|
|
* Indicate that we are done adding items to the PaintedLayer represented by
|
|
* aData. Make sure that a real PaintedLayer exists for it, and set the final
|
|
* visible region and opaque-content.
|
|
*/
|
|
template<typename FindOpaqueBackgroundColorCallbackType>
|
|
void FinishPaintedLayerData(PaintedLayerData& aData, FindOpaqueBackgroundColorCallbackType aFindOpaqueBackgroundColor);
|
|
|
|
protected:
|
|
friend class PaintedLayerData;
|
|
|
|
LayerManager::PaintedLayerCreationHint
|
|
GetLayerCreationHint(AnimatedGeometryRoot* aAnimatedGeometryRoot);
|
|
|
|
/**
|
|
* Creates a new PaintedLayer and sets up the transform on the PaintedLayer
|
|
* to account for scrolling.
|
|
*/
|
|
already_AddRefed<PaintedLayer> CreatePaintedLayer(PaintedLayerData* aData);
|
|
|
|
/**
|
|
* Find a PaintedLayer for recycling, recycle it and prepare it for use, or
|
|
* return null if no suitable layer was found.
|
|
*/
|
|
already_AddRefed<PaintedLayer> AttemptToRecyclePaintedLayer(AnimatedGeometryRoot* aAnimatedGeometryRoot,
|
|
nsDisplayItem* aItem,
|
|
const nsPoint& aTopLeft);
|
|
/**
|
|
* Recycle aLayer and do any necessary invalidation.
|
|
*/
|
|
PaintedDisplayItemLayerUserData* RecyclePaintedLayer(PaintedLayer* aLayer,
|
|
AnimatedGeometryRoot* aAnimatedGeometryRoot,
|
|
bool& didResetScrollPositionForLayerPixelAlignment);
|
|
|
|
/**
|
|
* Perform the last step of CreatePaintedLayer / AttemptToRecyclePaintedLayer:
|
|
* Initialize aData, set up the layer's transform for scrolling, and
|
|
* invalidate the layer for layer pixel alignment changes if necessary.
|
|
*/
|
|
void PreparePaintedLayerForUse(PaintedLayer* aLayer,
|
|
PaintedDisplayItemLayerUserData* aData,
|
|
AnimatedGeometryRoot* aAnimatedGeometryRoot,
|
|
const nsIFrame* aReferenceFrame,
|
|
const nsPoint& aTopLeft,
|
|
bool aDidResetScrollPositionForLayerPixelAlignment);
|
|
|
|
/**
|
|
* Attempt to prepare an ImageLayer based upon the provided PaintedLayerData.
|
|
* Returns nullptr on failure.
|
|
*/
|
|
already_AddRefed<Layer> PrepareImageLayer(PaintedLayerData* aData);
|
|
|
|
/**
|
|
* Attempt to prepare a ColorLayer based upon the provided PaintedLayerData.
|
|
* Returns nullptr on failure.
|
|
*/
|
|
already_AddRefed<Layer> PrepareColorLayer(PaintedLayerData* aData);
|
|
|
|
/**
|
|
* Grab the next recyclable ColorLayer, or create one if there are no
|
|
* more recyclable ColorLayers.
|
|
*/
|
|
already_AddRefed<ColorLayer> CreateOrRecycleColorLayer(PaintedLayer* aPainted);
|
|
/**
|
|
* Grab the next recyclable ImageLayer, or create one if there are no
|
|
* more recyclable ImageLayers.
|
|
*/
|
|
already_AddRefed<ImageLayer> CreateOrRecycleImageLayer(PaintedLayer* aPainted);
|
|
/**
|
|
* Grab a recyclable ImageLayer for use as a mask layer for aLayer (that is a
|
|
* mask layer which has been used for aLayer before), or create one if such
|
|
* a layer doesn't exist.
|
|
*
|
|
* Since mask layers can exist either on the layer directly, or as a side-
|
|
* attachment to FrameMetrics (for ancestor scrollframe clips), we key the
|
|
* recycle operation on both the originating layer and the mask layer's
|
|
* index in the layer, if any.
|
|
*/
|
|
struct MaskLayerKey;
|
|
already_AddRefed<ImageLayer> CreateOrRecycleMaskImageLayerFor(const MaskLayerKey& aKey);
|
|
/**
|
|
* Grabs all PaintedLayers and ColorLayers from the ContainerLayer and makes them
|
|
* available for recycling.
|
|
*/
|
|
void CollectOldLayers();
|
|
/**
|
|
* If aItem used to belong to a PaintedLayer, invalidates the area of
|
|
* aItem in that layer. If aNewLayer is a PaintedLayer, invalidates the area of
|
|
* aItem in that layer.
|
|
*/
|
|
void InvalidateForLayerChange(nsDisplayItem* aItem,
|
|
PaintedLayer* aNewLayer);
|
|
/**
|
|
* Returns true if aItem's opaque area (in aOpaque) covers the entire
|
|
* scrollable area of its presshell.
|
|
*/
|
|
bool ItemCoversScrollableArea(nsDisplayItem* aItem, const nsRegion& aOpaque);
|
|
|
|
/**
|
|
* Set FrameMetrics and scroll-induced clipping on aEntry's layer.
|
|
*/
|
|
void SetupScrollingMetadata(NewLayerEntry* aEntry);
|
|
|
|
/**
|
|
* Applies occlusion culling.
|
|
* For each layer in mNewChildLayers, remove from its visible region the
|
|
* opaque regions of the layers at higher z-index, but only if they have
|
|
* the same animated geometry root and fixed-pos frame ancestor.
|
|
* The opaque region for the child layers that share the same animated
|
|
* geometry root as the container frame is returned in
|
|
* *aOpaqueRegionForContainer.
|
|
*
|
|
* Also sets scroll metadata on the layers.
|
|
*/
|
|
void PostprocessRetainedLayers(nsIntRegion* aOpaqueRegionForContainer);
|
|
|
|
/**
|
|
* Computes the snapped opaque area of aItem. Sets aList's opaque flag
|
|
* if it covers the entire list bounds. Sets *aHideAllLayersBelow to true
|
|
* this item covers the entire viewport so that all layers below are
|
|
* permanently invisible.
|
|
*/
|
|
nsIntRegion ComputeOpaqueRect(nsDisplayItem* aItem,
|
|
AnimatedGeometryRoot* aAnimatedGeometryRoot,
|
|
const DisplayItemClip& aClip,
|
|
nsDisplayList* aList,
|
|
bool* aHideAllLayersBelow,
|
|
bool* aOpaqueForAnimatedGeometryRootParent);
|
|
|
|
/**
|
|
* Return a PaintedLayerData object that is initialized for a layer that
|
|
* aItem will be assigned to.
|
|
* @param aItem The item that is going to be added.
|
|
* @param aVisibleRect The visible rect of the item.
|
|
* @param aAnimatedGeometryRoot The item's animated geometry root.
|
|
* @param aScrollClip The scroll clip for this PaintedLayer.
|
|
* @param aTopLeft The offset between aAnimatedGeometryRoot and
|
|
* the reference frame.
|
|
* @param aShouldFixToViewport If true, aAnimatedGeometryRoot is the
|
|
* viewport and we will be adding fixed-pos
|
|
* metadata for this layer because the display
|
|
* item returned true from ShouldFixToViewport.
|
|
*/
|
|
PaintedLayerData NewPaintedLayerData(nsDisplayItem* aItem,
|
|
AnimatedGeometryRoot* aAnimatedGeometryRoot,
|
|
const DisplayItemScrollClip* aScrollClip,
|
|
const nsPoint& aTopLeft,
|
|
bool aShouldFixToViewport);
|
|
|
|
/* Build a mask layer to represent the clipping region. Will return null if
|
|
* there is no clipping specified or a mask layer cannot be built.
|
|
* Builds an ImageLayer for the appropriate backend; the mask is relative to
|
|
* aLayer's visible region.
|
|
* aLayer is the layer to be clipped.
|
|
* aLayerVisibleRegion is the region that will be set as aLayer's visible region,
|
|
* relative to the container reference frame
|
|
* aRoundedRectClipCount is used when building mask layers for PaintedLayers,
|
|
* SetupMaskLayer will build a mask layer for only the first
|
|
* aRoundedRectClipCount rounded rects in aClip
|
|
*/
|
|
void SetupMaskLayer(Layer *aLayer, const DisplayItemClip& aClip,
|
|
const nsIntRegion& aLayerVisibleRegion,
|
|
uint32_t aRoundedRectClipCount = UINT32_MAX);
|
|
|
|
/**
|
|
* If |aClip| has rounded corners, create a mask layer for them, and
|
|
* add it to |aLayer|'s ancestor mask layers, returning an index into
|
|
* the array of ancestor mask layers. Returns an empty Maybe if
|
|
* |aClip| does not have rounded corners, or if no mask layer could
|
|
* be created.
|
|
*/
|
|
Maybe<size_t> SetupMaskLayerForScrolledClip(Layer* aLayer,
|
|
const DisplayItemClip& aClip);
|
|
|
|
already_AddRefed<Layer> CreateMaskLayer(
|
|
Layer *aLayer, const DisplayItemClip& aClip,
|
|
const Maybe<size_t>& aForAncestorMaskLayer,
|
|
uint32_t aRoundedRectClipCount = UINT32_MAX);
|
|
|
|
bool ChooseAnimatedGeometryRoot(const nsDisplayList& aList,
|
|
AnimatedGeometryRoot **aAnimatedGeometryRoot);
|
|
|
|
nsDisplayListBuilder* mBuilder;
|
|
LayerManager* mManager;
|
|
FrameLayerBuilder* mLayerBuilder;
|
|
nsIFrame* mContainerFrame;
|
|
nsIFrame* mContainerReferenceFrame;
|
|
AnimatedGeometryRoot* mContainerAnimatedGeometryRoot;
|
|
ContainerLayer* mContainerLayer;
|
|
nsRect mContainerBounds;
|
|
const DisplayItemScrollClip* mContainerScrollClip;
|
|
const DisplayItemScrollClip* mScrollClipForPerspectiveChild;
|
|
#ifdef DEBUG
|
|
nsRect mAccumulatedChildBounds;
|
|
#endif
|
|
ContainerLayerParameters mParameters;
|
|
/**
|
|
* The region of PaintedLayers that should be invalidated every time
|
|
* we recycle one.
|
|
*/
|
|
nsIntRegion mInvalidPaintedContent;
|
|
PaintedLayerDataTree mPaintedLayerDataTree;
|
|
/**
|
|
* We collect the list of children in here. During ProcessDisplayItems,
|
|
* the layers in this array either have mContainerLayer as their parent,
|
|
* or no parent.
|
|
* PaintedLayers have two entries in this array: the second one is used only if
|
|
* the PaintedLayer is optimized away to a ColorLayer or ImageLayer.
|
|
* It's essential that this array is only appended to, since PaintedLayerData
|
|
* records the index of its PaintedLayer in this array.
|
|
*/
|
|
typedef AutoTArray<NewLayerEntry,1> AutoLayersArray;
|
|
AutoLayersArray mNewChildLayers;
|
|
nsTHashtable<nsRefPtrHashKey<PaintedLayer>> mPaintedLayersAvailableForRecycling;
|
|
nscoord mAppUnitsPerDevPixel;
|
|
bool mSnappingEnabled;
|
|
bool mFlattenToSingleLayer;
|
|
|
|
struct MaskLayerKey {
|
|
MaskLayerKey() : mLayer(nullptr) {}
|
|
MaskLayerKey(Layer* aLayer, const Maybe<size_t>& aAncestorIndex)
|
|
: mLayer(aLayer),
|
|
mAncestorIndex(aAncestorIndex)
|
|
{}
|
|
|
|
PLDHashNumber Hash() const {
|
|
// Hash the layer and add the layer index to the hash.
|
|
return (NS_PTR_TO_UINT32(mLayer) >> 2)
|
|
+ (mAncestorIndex ? (*mAncestorIndex + 1) : 0);
|
|
}
|
|
bool operator ==(const MaskLayerKey& aOther) const {
|
|
return mLayer == aOther.mLayer &&
|
|
mAncestorIndex == aOther.mAncestorIndex;
|
|
}
|
|
|
|
Layer* mLayer;
|
|
Maybe<size_t> mAncestorIndex;
|
|
};
|
|
|
|
nsDataHashtable<nsGenericHashKey<MaskLayerKey>, RefPtr<ImageLayer>>
|
|
mRecycledMaskImageLayers;
|
|
};
|
|
|
|
class PaintedDisplayItemLayerUserData : public LayerUserData
|
|
{
|
|
public:
|
|
PaintedDisplayItemLayerUserData() :
|
|
mMaskClipCount(0),
|
|
mForcedBackgroundColor(NS_RGBA(0,0,0,0)),
|
|
mFontSmoothingBackgroundColor(NS_RGBA(0,0,0,0)),
|
|
mXScale(1.f), mYScale(1.f),
|
|
mAppUnitsPerDevPixel(0),
|
|
mTranslation(0, 0),
|
|
mAnimatedGeometryRootPosition(0, 0) {}
|
|
|
|
/**
|
|
* Record the number of clips in the PaintedLayer's mask layer.
|
|
* Should not be reset when the layer is recycled since it is used to track
|
|
* changes in the use of mask layers.
|
|
*/
|
|
uint32_t mMaskClipCount;
|
|
|
|
/**
|
|
* A color that should be painted over the bounds of the layer's visible
|
|
* region before any other content is painted.
|
|
*/
|
|
nscolor mForcedBackgroundColor;
|
|
|
|
/**
|
|
* The target background color for smoothing fonts that are drawn on top of
|
|
* transparent parts of the layer.
|
|
*/
|
|
nscolor mFontSmoothingBackgroundColor;
|
|
|
|
/**
|
|
* The resolution scale used.
|
|
*/
|
|
float mXScale, mYScale;
|
|
|
|
/**
|
|
* The appunits per dev pixel for the items in this layer.
|
|
*/
|
|
nscoord mAppUnitsPerDevPixel;
|
|
|
|
/**
|
|
* The offset from the PaintedLayer's 0,0 to the
|
|
* reference frame. This isn't necessarily the same as the transform
|
|
* set on the PaintedLayer since we might also be applying an extra
|
|
* offset specified by the parent ContainerLayer/
|
|
*/
|
|
nsIntPoint mTranslation;
|
|
|
|
/**
|
|
* We try to make 0,0 of the PaintedLayer be the top-left of the
|
|
* border-box of the "active scrolled root" frame (i.e. the nearest ancestor
|
|
* frame for the display items that is being actively scrolled). But
|
|
* we force the PaintedLayer transform to be an integer translation, and we may
|
|
* have a resolution scale, so we have to snap the PaintedLayer transform, so
|
|
* 0,0 may not be exactly the top-left of the active scrolled root. Here we
|
|
* store the coordinates in PaintedLayer space of the top-left of the
|
|
* active scrolled root.
|
|
*/
|
|
gfxPoint mAnimatedGeometryRootPosition;
|
|
|
|
nsIntRegion mRegionToInvalidate;
|
|
|
|
// The offset between the active scrolled root of this layer
|
|
// and the root of the container for the previous and current
|
|
// paints respectively.
|
|
nsPoint mLastAnimatedGeometryRootOrigin;
|
|
nsPoint mAnimatedGeometryRootOrigin;
|
|
|
|
RefPtr<ColorLayer> mColorLayer;
|
|
RefPtr<ImageLayer> mImageLayer;
|
|
|
|
// The region for which display item visibility for this layer has already
|
|
// been calculated. Used to reduce the number of calls to
|
|
// RecomputeVisibilityForItems if it is known in advance that a larger
|
|
// region will be painted during a transaction than in a single call to
|
|
// DrawPaintedLayer, for example when progressive paint is enabled.
|
|
nsIntRegion mVisibilityComputedRegion;
|
|
};
|
|
|
|
/*
|
|
* User data for layers which will be used as masks.
|
|
*/
|
|
struct MaskLayerUserData : public LayerUserData
|
|
{
|
|
MaskLayerUserData()
|
|
: mScaleX(-1.0f)
|
|
, mScaleY(-1.0f)
|
|
, mAppUnitsPerDevPixel(-1)
|
|
{ }
|
|
|
|
bool
|
|
operator== (const MaskLayerUserData& aOther) const
|
|
{
|
|
return mRoundedClipRects == aOther.mRoundedClipRects &&
|
|
mScaleX == aOther.mScaleX &&
|
|
mScaleY == aOther.mScaleY &&
|
|
mOffset == aOther.mOffset &&
|
|
mAppUnitsPerDevPixel == aOther.mAppUnitsPerDevPixel;
|
|
}
|
|
|
|
// Keeps a MaskLayerImageKey alive by managing its mLayerCount member-var
|
|
MaskLayerImageCache::MaskLayerImageKeyRef mImageKey;
|
|
// properties of the mask layer; the mask layer may be re-used if these
|
|
// remain unchanged.
|
|
nsTArray<DisplayItemClip::RoundedRect> mRoundedClipRects;
|
|
// scale from the masked layer which is applied to the mask
|
|
float mScaleX, mScaleY;
|
|
// The ContainerLayerParameters offset which is applied to the mask's transform.
|
|
nsIntPoint mOffset;
|
|
int32_t mAppUnitsPerDevPixel;
|
|
};
|
|
|
|
class MaskImageData
|
|
{
|
|
public:
|
|
MaskImageData(const gfx::IntSize& aSize, LayerManager* aLayerManager)
|
|
: mTextureClientLocked(false)
|
|
, mSize(aSize)
|
|
, mLayerManager(aLayerManager)
|
|
{
|
|
}
|
|
|
|
~MaskImageData()
|
|
{
|
|
if (mTextureClientLocked) {
|
|
MOZ_ASSERT(mTextureClient);
|
|
// Clear DrawTarget before Unlock.
|
|
mDrawTarget = nullptr;
|
|
mTextureClient->Unlock();
|
|
}
|
|
}
|
|
|
|
gfx::DrawTarget* CreateDrawTarget()
|
|
{
|
|
MOZ_ASSERT(mLayerManager);
|
|
if (mDrawTarget) {
|
|
return mDrawTarget;
|
|
}
|
|
|
|
if (mLayerManager->GetBackendType() == LayersBackend::LAYERS_BASIC) {
|
|
mDrawTarget = mLayerManager->CreateOptimalMaskDrawTarget(mSize);
|
|
return mDrawTarget;
|
|
}
|
|
|
|
MOZ_ASSERT(mLayerManager->GetBackendType() == LayersBackend::LAYERS_CLIENT);
|
|
|
|
ShadowLayerForwarder* fwd = mLayerManager->AsShadowForwarder();
|
|
if (!fwd) {
|
|
return nullptr;
|
|
}
|
|
mTextureClient =
|
|
TextureClient::CreateForDrawing(fwd,
|
|
SurfaceFormat::A8,
|
|
mSize,
|
|
BackendSelector::Content,
|
|
TextureFlags::DISALLOW_BIGIMAGE,
|
|
TextureAllocationFlags::ALLOC_CLEAR_BUFFER);
|
|
if (!mTextureClient) {
|
|
return nullptr;
|
|
}
|
|
|
|
mTextureClientLocked = mTextureClient->Lock(OpenMode::OPEN_READ_WRITE);
|
|
if (!mTextureClientLocked) {
|
|
return nullptr;
|
|
}
|
|
|
|
mDrawTarget = mTextureClient->BorrowDrawTarget();
|
|
return mDrawTarget;
|
|
}
|
|
|
|
already_AddRefed<Image> CreateImage()
|
|
{
|
|
if (mLayerManager->GetBackendType() == LayersBackend::LAYERS_BASIC &&
|
|
mDrawTarget) {
|
|
RefPtr<SourceSurface> surface = mDrawTarget->Snapshot();
|
|
RefPtr<SourceSurfaceImage> image = new SourceSurfaceImage(mSize, surface);
|
|
return image.forget();
|
|
}
|
|
|
|
if (mLayerManager->GetBackendType() == LayersBackend::LAYERS_CLIENT &&
|
|
mTextureClient &&
|
|
mDrawTarget) {
|
|
RefPtr<TextureWrapperImage> image =
|
|
new TextureWrapperImage(mTextureClient, gfx::IntRect(gfx::IntPoint(0, 0), mSize));
|
|
return image.forget();
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
private:
|
|
bool mTextureClientLocked;
|
|
gfx::IntSize mSize;
|
|
LayerManager* mLayerManager;
|
|
RefPtr<gfx::DrawTarget> mDrawTarget;
|
|
RefPtr<TextureClient> mTextureClient;
|
|
};
|
|
|
|
/**
|
|
* Helper functions for getting user data and casting it to the correct type.
|
|
* aLayer is the layer where the user data is stored.
|
|
*/
|
|
MaskLayerUserData* GetMaskLayerUserData(Layer* aLayer)
|
|
{
|
|
return static_cast<MaskLayerUserData*>(aLayer->GetUserData(&gMaskLayerUserData));
|
|
}
|
|
|
|
PaintedDisplayItemLayerUserData* GetPaintedDisplayItemLayerUserData(Layer* aLayer)
|
|
{
|
|
return static_cast<PaintedDisplayItemLayerUserData*>(
|
|
aLayer->GetUserData(&gPaintedDisplayItemLayerUserData));
|
|
}
|
|
|
|
/* static */ void
|
|
FrameLayerBuilder::Shutdown()
|
|
{
|
|
if (gMaskLayerImageCache) {
|
|
delete gMaskLayerImageCache;
|
|
gMaskLayerImageCache = nullptr;
|
|
}
|
|
}
|
|
|
|
void
|
|
FrameLayerBuilder::Init(nsDisplayListBuilder* aBuilder, LayerManager* aManager,
|
|
PaintedLayerData* aLayerData)
|
|
{
|
|
mDisplayListBuilder = aBuilder;
|
|
mRootPresContext = aBuilder->RootReferenceFrame()->PresContext()->GetRootPresContext();
|
|
if (mRootPresContext) {
|
|
mInitialDOMGeneration = mRootPresContext->GetDOMGeneration();
|
|
}
|
|
mContainingPaintedLayer = aLayerData;
|
|
aManager->SetUserData(&gLayerManagerLayerBuilder, this);
|
|
}
|
|
|
|
void
|
|
FrameLayerBuilder::FlashPaint(gfxContext *aContext)
|
|
{
|
|
float r = float(rand()) / RAND_MAX;
|
|
float g = float(rand()) / RAND_MAX;
|
|
float b = float(rand()) / RAND_MAX;
|
|
aContext->SetColor(Color(r, g, b, 0.4f));
|
|
aContext->Paint();
|
|
}
|
|
|
|
static FrameLayerBuilder::DisplayItemData*
|
|
AssertDisplayItemData(FrameLayerBuilder::DisplayItemData* aData)
|
|
{
|
|
MOZ_RELEASE_ASSERT(aData);
|
|
MOZ_RELEASE_ASSERT(sAliveDisplayItemDatas && sAliveDisplayItemDatas->Contains(aData));
|
|
MOZ_RELEASE_ASSERT(aData->mLayer);
|
|
return aData;
|
|
}
|
|
|
|
FrameLayerBuilder::DisplayItemData*
|
|
FrameLayerBuilder::GetDisplayItemData(nsIFrame* aFrame, uint32_t aKey)
|
|
{
|
|
const nsTArray<DisplayItemData*>* array =
|
|
aFrame->Properties().Get(LayerManagerDataProperty());
|
|
if (array) {
|
|
for (uint32_t i = 0; i < array->Length(); i++) {
|
|
DisplayItemData* item = AssertDisplayItemData(array->ElementAt(i));
|
|
if (item->mDisplayItemKey == aKey &&
|
|
item->mLayer->Manager() == mRetainingManager) {
|
|
return item;
|
|
}
|
|
}
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
nsACString&
|
|
AppendToString(nsACString& s, const nsIntRect& r,
|
|
const char* pfx="", const char* sfx="")
|
|
{
|
|
s += pfx;
|
|
s += nsPrintfCString(
|
|
"(x=%d, y=%d, w=%d, h=%d)",
|
|
r.x, r.y, r.width, r.height);
|
|
return s += sfx;
|
|
}
|
|
|
|
nsACString&
|
|
AppendToString(nsACString& s, const nsIntRegion& r,
|
|
const char* pfx="", const char* sfx="")
|
|
{
|
|
s += pfx;
|
|
|
|
s += "< ";
|
|
for (auto iter = r.RectIter(); !iter.Done(); iter.Next()) {
|
|
AppendToString(s, iter.Get()) += "; ";
|
|
}
|
|
s += ">";
|
|
|
|
return s += sfx;
|
|
}
|
|
|
|
/**
|
|
* Invalidate aRegion in aLayer. aLayer is in the coordinate system
|
|
* *after* aTranslation has been applied, so we need to
|
|
* apply the inverse of that transform before calling InvalidateRegion.
|
|
*/
|
|
static void
|
|
InvalidatePostTransformRegion(PaintedLayer* aLayer, const nsIntRegion& aRegion,
|
|
const nsIntPoint& aTranslation)
|
|
{
|
|
// Convert the region from the coordinates of the container layer
|
|
// (relative to the snapped top-left of the display list reference frame)
|
|
// to the PaintedLayer's own coordinates
|
|
nsIntRegion rgn = aRegion;
|
|
rgn.MoveBy(-aTranslation);
|
|
aLayer->InvalidateRegion(rgn);
|
|
#ifdef MOZ_DUMP_PAINTING
|
|
if (nsLayoutUtils::InvalidationDebuggingIsEnabled()) {
|
|
nsAutoCString str;
|
|
AppendToString(str, rgn);
|
|
printf_stderr("Invalidating layer %p: %s\n", aLayer, str.get());
|
|
}
|
|
#endif
|
|
}
|
|
|
|
static void
|
|
InvalidatePostTransformRegion(PaintedLayer* aLayer, const nsRect& aRect,
|
|
const DisplayItemClip& aClip,
|
|
const nsIntPoint& aTranslation)
|
|
{
|
|
PaintedDisplayItemLayerUserData* data =
|
|
static_cast<PaintedDisplayItemLayerUserData*>(aLayer->GetUserData(&gPaintedDisplayItemLayerUserData));
|
|
|
|
nsRect rect = aClip.ApplyNonRoundedIntersection(aRect);
|
|
|
|
nsIntRect pixelRect = rect.ScaleToOutsidePixels(data->mXScale, data->mYScale, data->mAppUnitsPerDevPixel);
|
|
InvalidatePostTransformRegion(aLayer, pixelRect, aTranslation);
|
|
}
|
|
|
|
|
|
static nsIntPoint
|
|
GetTranslationForPaintedLayer(PaintedLayer* aLayer)
|
|
{
|
|
PaintedDisplayItemLayerUserData* data =
|
|
static_cast<PaintedDisplayItemLayerUserData*>
|
|
(aLayer->GetUserData(&gPaintedDisplayItemLayerUserData));
|
|
NS_ASSERTION(data, "Must be a tracked painted layer!");
|
|
|
|
return data->mTranslation;
|
|
}
|
|
|
|
/**
|
|
* Some frames can have multiple, nested, retaining layer managers
|
|
* associated with them (normal manager, inactive managers, SVG effects).
|
|
* In these cases we store the 'outermost' LayerManager data property
|
|
* on the frame since we can walk down the chain from there.
|
|
*
|
|
* If one of these frames has just been destroyed, we will free the inner
|
|
* layer manager when removing the entry from mFramesWithLayers. Destroying
|
|
* the layer manager destroys the LayerManagerData and calls into
|
|
* the DisplayItemData destructor. If the inner layer manager had any
|
|
* items with the same frame, then we attempt to retrieve properties
|
|
* from the deleted frame.
|
|
*
|
|
* Cache the destroyed frame pointer here so we can avoid crashing in this case.
|
|
*/
|
|
|
|
/* static */ void
|
|
FrameLayerBuilder::RemoveFrameFromLayerManager(const nsIFrame* aFrame,
|
|
nsTArray<DisplayItemData*>* aArray)
|
|
{
|
|
MOZ_RELEASE_ASSERT(!sDestroyedFrame);
|
|
sDestroyedFrame = aFrame;
|
|
|
|
// Hold a reference to all the items so that they don't get
|
|
// deleted from under us.
|
|
nsTArray<RefPtr<DisplayItemData> > arrayCopy;
|
|
for (DisplayItemData* data : *aArray) {
|
|
arrayCopy.AppendElement(data);
|
|
}
|
|
|
|
#ifdef DEBUG_DISPLAY_ITEM_DATA
|
|
if (aArray->Length()) {
|
|
LayerManagerData *rootData = aArray->ElementAt(0)->mParent;
|
|
while (rootData->mParent) {
|
|
rootData = rootData->mParent;
|
|
}
|
|
printf_stderr("Removing frame %p - dumping display data\n", aFrame);
|
|
rootData->Dump();
|
|
}
|
|
#endif
|
|
|
|
for (DisplayItemData* data : *aArray) {
|
|
PaintedLayer* t = data->mLayer->AsPaintedLayer();
|
|
if (t) {
|
|
PaintedDisplayItemLayerUserData* paintedData =
|
|
static_cast<PaintedDisplayItemLayerUserData*>(t->GetUserData(&gPaintedDisplayItemLayerUserData));
|
|
if (paintedData) {
|
|
nsRegion old = data->mGeometry->ComputeInvalidationRegion();
|
|
nsIntRegion rgn = old.ScaleToOutsidePixels(paintedData->mXScale, paintedData->mYScale, paintedData->mAppUnitsPerDevPixel);
|
|
rgn.MoveBy(-GetTranslationForPaintedLayer(t));
|
|
paintedData->mRegionToInvalidate.Or(paintedData->mRegionToInvalidate, rgn);
|
|
paintedData->mRegionToInvalidate.SimplifyOutward(8);
|
|
}
|
|
}
|
|
|
|
data->mParent->mDisplayItems.RemoveEntry(data);
|
|
}
|
|
|
|
arrayCopy.Clear();
|
|
delete aArray;
|
|
sDestroyedFrame = nullptr;
|
|
}
|
|
|
|
void
|
|
FrameLayerBuilder::DidBeginRetainedLayerTransaction(LayerManager* aManager)
|
|
{
|
|
mRetainingManager = aManager;
|
|
LayerManagerData* data = static_cast<LayerManagerData*>
|
|
(aManager->GetUserData(&gLayerManagerUserData));
|
|
if (data) {
|
|
mInvalidateAllLayers = data->mInvalidateAllLayers;
|
|
} else {
|
|
data = new LayerManagerData(aManager);
|
|
aManager->SetUserData(&gLayerManagerUserData, data);
|
|
}
|
|
}
|
|
|
|
void
|
|
FrameLayerBuilder::StoreOptimizedLayerForFrame(nsDisplayItem* aItem, Layer* aLayer)
|
|
{
|
|
if (!mRetainingManager) {
|
|
return;
|
|
}
|
|
|
|
DisplayItemData* data = GetDisplayItemDataForManager(aItem, aLayer->Manager());
|
|
NS_ASSERTION(data, "Must have already stored data for this item!");
|
|
data->mOptLayer = aLayer;
|
|
}
|
|
|
|
void
|
|
FrameLayerBuilder::DidEndTransaction()
|
|
{
|
|
GetMaskLayerImageCache()->Sweep();
|
|
}
|
|
|
|
void
|
|
FrameLayerBuilder::WillEndTransaction()
|
|
{
|
|
if (!mRetainingManager) {
|
|
return;
|
|
}
|
|
|
|
// We need to save the data we'll need to support retaining.
|
|
LayerManagerData* data = static_cast<LayerManagerData*>
|
|
(mRetainingManager->GetUserData(&gLayerManagerUserData));
|
|
NS_ASSERTION(data, "Must have data!");
|
|
|
|
// Update all the frames that used to have layers.
|
|
for (auto iter = data->mDisplayItems.Iter(); !iter.Done(); iter.Next()) {
|
|
DisplayItemData* data = iter.Get()->GetKey();
|
|
if (!data->mUsed) {
|
|
// This item was visible, but isn't anymore.
|
|
PaintedLayer* t = data->mLayer->AsPaintedLayer();
|
|
if (t && data->mGeometry) {
|
|
#ifdef MOZ_DUMP_PAINTING
|
|
if (nsLayoutUtils::InvalidationDebuggingIsEnabled()) {
|
|
printf_stderr("Invalidating unused display item (%i) belonging to frame %p from layer %p\n", data->mDisplayItemKey, data->mFrameList[0], t);
|
|
}
|
|
#endif
|
|
InvalidatePostTransformRegion(t,
|
|
data->mGeometry->ComputeInvalidationRegion(),
|
|
data->mClip,
|
|
GetLastPaintOffset(t));
|
|
}
|
|
|
|
data->ClearAnimationCompositorState();
|
|
iter.Remove();
|
|
} else {
|
|
ComputeGeometryChangeForItem(data);
|
|
}
|
|
}
|
|
|
|
data->mInvalidateAllLayers = false;
|
|
}
|
|
|
|
/* static */ FrameLayerBuilder::DisplayItemData*
|
|
FrameLayerBuilder::GetDisplayItemDataForManager(nsDisplayItem* aItem,
|
|
LayerManager* aManager)
|
|
{
|
|
const nsTArray<DisplayItemData*>* array =
|
|
aItem->Frame()->Properties().Get(LayerManagerDataProperty());
|
|
if (array) {
|
|
for (uint32_t i = 0; i < array->Length(); i++) {
|
|
DisplayItemData* item = AssertDisplayItemData(array->ElementAt(i));
|
|
if (item->mDisplayItemKey == aItem->GetPerFrameKey() &&
|
|
item->mLayer->Manager() == aManager) {
|
|
return item;
|
|
}
|
|
}
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
bool
|
|
FrameLayerBuilder::HasRetainedDataFor(nsIFrame* aFrame, uint32_t aDisplayItemKey)
|
|
{
|
|
const nsTArray<DisplayItemData*>* array =
|
|
aFrame->Properties().Get(LayerManagerDataProperty());
|
|
if (array) {
|
|
for (uint32_t i = 0; i < array->Length(); i++) {
|
|
if (AssertDisplayItemData(array->ElementAt(i))->mDisplayItemKey == aDisplayItemKey) {
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
void
|
|
FrameLayerBuilder::IterateRetainedDataFor(nsIFrame* aFrame, DisplayItemDataCallback aCallback)
|
|
{
|
|
const nsTArray<DisplayItemData*>* array =
|
|
aFrame->Properties().Get(LayerManagerDataProperty());
|
|
if (!array) {
|
|
return;
|
|
}
|
|
|
|
for (uint32_t i = 0; i < array->Length(); i++) {
|
|
DisplayItemData* data = AssertDisplayItemData(array->ElementAt(i));
|
|
if (data->mDisplayItemKey != nsDisplayItem::TYPE_ZERO) {
|
|
aCallback(aFrame, data);
|
|
}
|
|
}
|
|
}
|
|
|
|
FrameLayerBuilder::DisplayItemData*
|
|
FrameLayerBuilder::GetOldLayerForFrame(nsIFrame* aFrame, uint32_t aDisplayItemKey)
|
|
{
|
|
// If we need to build a new layer tree, then just refuse to recycle
|
|
// anything.
|
|
if (!mRetainingManager || mInvalidateAllLayers)
|
|
return nullptr;
|
|
|
|
DisplayItemData *data = GetDisplayItemData(aFrame, aDisplayItemKey);
|
|
|
|
if (data && data->mLayer->Manager() == mRetainingManager) {
|
|
return data;
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
Layer*
|
|
FrameLayerBuilder::GetOldLayerFor(nsDisplayItem* aItem,
|
|
nsDisplayItemGeometry** aOldGeometry,
|
|
DisplayItemClip** aOldClip)
|
|
{
|
|
uint32_t key = aItem->GetPerFrameKey();
|
|
nsIFrame* frame = aItem->Frame();
|
|
|
|
DisplayItemData* oldData = GetOldLayerForFrame(frame, key);
|
|
if (oldData) {
|
|
if (aOldGeometry) {
|
|
*aOldGeometry = oldData->mGeometry.get();
|
|
}
|
|
if (aOldClip) {
|
|
*aOldClip = &oldData->mClip;
|
|
}
|
|
return oldData->mLayer;
|
|
}
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
void
|
|
FrameLayerBuilder::ClearCachedGeometry(nsDisplayItem* aItem)
|
|
{
|
|
uint32_t key = aItem->GetPerFrameKey();
|
|
nsIFrame* frame = aItem->Frame();
|
|
|
|
DisplayItemData* oldData = GetOldLayerForFrame(frame, key);
|
|
if (oldData) {
|
|
oldData->mGeometry = nullptr;
|
|
}
|
|
}
|
|
|
|
/* static */ Layer*
|
|
FrameLayerBuilder::GetDebugOldLayerFor(nsIFrame* aFrame, uint32_t aDisplayItemKey)
|
|
{
|
|
const nsTArray<DisplayItemData*>* array =
|
|
aFrame->Properties().Get(LayerManagerDataProperty());
|
|
|
|
if (!array) {
|
|
return nullptr;
|
|
}
|
|
|
|
for (uint32_t i = 0; i < array->Length(); i++) {
|
|
DisplayItemData *data = AssertDisplayItemData(array->ElementAt(i));
|
|
|
|
if (data->mDisplayItemKey == aDisplayItemKey) {
|
|
return data->mLayer;
|
|
}
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
/* static */ PaintedLayer*
|
|
FrameLayerBuilder::GetDebugSingleOldPaintedLayerForFrame(nsIFrame* aFrame)
|
|
{
|
|
const nsTArray<DisplayItemData*>* array =
|
|
aFrame->Properties().Get(LayerManagerDataProperty());
|
|
|
|
if (!array) {
|
|
return nullptr;
|
|
}
|
|
|
|
Layer* layer = nullptr;
|
|
for (DisplayItemData* data : *array) {
|
|
AssertDisplayItemData(data);
|
|
if (!data->mLayer->AsPaintedLayer()) {
|
|
continue;
|
|
}
|
|
if (layer && layer != data->mLayer) {
|
|
// More than one layer assigned, bail.
|
|
return nullptr;
|
|
}
|
|
layer = data->mLayer;
|
|
}
|
|
return layer->AsPaintedLayer();
|
|
}
|
|
|
|
already_AddRefed<ColorLayer>
|
|
ContainerState::CreateOrRecycleColorLayer(PaintedLayer *aPainted)
|
|
{
|
|
PaintedDisplayItemLayerUserData* data =
|
|
static_cast<PaintedDisplayItemLayerUserData*>(aPainted->GetUserData(&gPaintedDisplayItemLayerUserData));
|
|
RefPtr<ColorLayer> layer = data->mColorLayer;
|
|
if (layer) {
|
|
layer->SetMaskLayer(nullptr);
|
|
layer->ClearExtraDumpInfo();
|
|
} else {
|
|
// Create a new layer
|
|
layer = mManager->CreateColorLayer();
|
|
if (!layer)
|
|
return nullptr;
|
|
// Mark this layer as being used for painting display items
|
|
data->mColorLayer = layer;
|
|
layer->SetUserData(&gColorLayerUserData, nullptr);
|
|
|
|
// Remove other layer types we might have stored for this PaintedLayer
|
|
data->mImageLayer = nullptr;
|
|
}
|
|
return layer.forget();
|
|
}
|
|
|
|
already_AddRefed<ImageLayer>
|
|
ContainerState::CreateOrRecycleImageLayer(PaintedLayer *aPainted)
|
|
{
|
|
PaintedDisplayItemLayerUserData* data =
|
|
static_cast<PaintedDisplayItemLayerUserData*>(aPainted->GetUserData(&gPaintedDisplayItemLayerUserData));
|
|
RefPtr<ImageLayer> layer = data->mImageLayer;
|
|
if (layer) {
|
|
layer->SetMaskLayer(nullptr);
|
|
layer->ClearExtraDumpInfo();
|
|
} else {
|
|
// Create a new layer
|
|
layer = mManager->CreateImageLayer();
|
|
if (!layer)
|
|
return nullptr;
|
|
// Mark this layer as being used for painting display items
|
|
data->mImageLayer = layer;
|
|
layer->SetUserData(&gImageLayerUserData, nullptr);
|
|
|
|
// Remove other layer types we might have stored for this PaintedLayer
|
|
data->mColorLayer = nullptr;
|
|
}
|
|
return layer.forget();
|
|
}
|
|
|
|
already_AddRefed<ImageLayer>
|
|
ContainerState::CreateOrRecycleMaskImageLayerFor(const MaskLayerKey& aKey)
|
|
{
|
|
RefPtr<ImageLayer> result = mRecycledMaskImageLayers.Get(aKey);
|
|
if (result) {
|
|
mRecycledMaskImageLayers.Remove(aKey);
|
|
aKey.mLayer->ClearExtraDumpInfo();
|
|
// XXX if we use clip on mask layers, null it out here
|
|
} else {
|
|
// Create a new layer
|
|
result = mManager->CreateImageLayer();
|
|
if (!result)
|
|
return nullptr;
|
|
result->SetUserData(&gMaskLayerUserData, new MaskLayerUserData());
|
|
result->SetDisallowBigImage(true);
|
|
}
|
|
|
|
return result.forget();
|
|
}
|
|
|
|
static const double SUBPIXEL_OFFSET_EPSILON = 0.02;
|
|
|
|
/**
|
|
* This normally computes NSToIntRoundUp(aValue). However, if that would
|
|
* give a residual near 0.5 while aOldResidual is near -0.5, or
|
|
* it would give a residual near -0.5 while aOldResidual is near 0.5, then
|
|
* instead we return the integer in the other direction so that the residual
|
|
* is close to aOldResidual.
|
|
*/
|
|
static int32_t
|
|
RoundToMatchResidual(double aValue, double aOldResidual)
|
|
{
|
|
int32_t v = NSToIntRoundUp(aValue);
|
|
double residual = aValue - v;
|
|
if (aOldResidual < 0) {
|
|
if (residual > 0 && fabs(residual - 1.0 - aOldResidual) < SUBPIXEL_OFFSET_EPSILON) {
|
|
// Round up instead
|
|
return int32_t(ceil(aValue));
|
|
}
|
|
} else if (aOldResidual > 0) {
|
|
if (residual < 0 && fabs(residual + 1.0 - aOldResidual) < SUBPIXEL_OFFSET_EPSILON) {
|
|
// Round down instead
|
|
return int32_t(floor(aValue));
|
|
}
|
|
}
|
|
return v;
|
|
}
|
|
|
|
static void
|
|
ResetScrollPositionForLayerPixelAlignment(AnimatedGeometryRoot* aAnimatedGeometryRoot)
|
|
{
|
|
nsIScrollableFrame* sf = nsLayoutUtils::GetScrollableFrameFor(*aAnimatedGeometryRoot);
|
|
if (sf) {
|
|
sf->ResetScrollPositionForLayerPixelAlignment();
|
|
}
|
|
}
|
|
|
|
static void
|
|
InvalidateEntirePaintedLayer(PaintedLayer* aLayer, AnimatedGeometryRoot* aAnimatedGeometryRoot, const char *aReason)
|
|
{
|
|
#ifdef MOZ_DUMP_PAINTING
|
|
if (nsLayoutUtils::InvalidationDebuggingIsEnabled()) {
|
|
printf_stderr("Invalidating entire layer %p: %s\n", aLayer, aReason);
|
|
}
|
|
#endif
|
|
nsIntRect invalidate = aLayer->GetValidRegion().GetBounds();
|
|
aLayer->InvalidateRegion(invalidate);
|
|
aLayer->SetInvalidRectToVisibleRegion();
|
|
ResetScrollPositionForLayerPixelAlignment(aAnimatedGeometryRoot);
|
|
}
|
|
|
|
LayerManager::PaintedLayerCreationHint
|
|
ContainerState::GetLayerCreationHint(AnimatedGeometryRoot* aAnimatedGeometryRoot)
|
|
{
|
|
// Check whether the layer will be scrollable. This is used as a hint to
|
|
// influence whether tiled layers are used or not.
|
|
|
|
// Check creation hint inherited from our parent.
|
|
if (mParameters.mLayerCreationHint == LayerManager::SCROLLABLE) {
|
|
return LayerManager::SCROLLABLE;
|
|
}
|
|
|
|
// Check whether there's any active scroll frame on the animated geometry
|
|
// root chain.
|
|
for (AnimatedGeometryRoot* agr = aAnimatedGeometryRoot;
|
|
agr != mContainerAnimatedGeometryRoot;
|
|
agr = agr->mParentAGR) {
|
|
nsIFrame* fParent = nsLayoutUtils::GetCrossDocParentFrame(*agr);
|
|
if (!fParent) {
|
|
break;
|
|
}
|
|
nsIScrollableFrame* scrollable = do_QueryFrame(fParent);
|
|
if (scrollable
|
|
#ifdef MOZ_B2G
|
|
&& scrollable->WantAsyncScroll()
|
|
#endif
|
|
) {
|
|
// WantAsyncScroll() returns false when the frame has overflow:hidden,
|
|
// so we won't create tiled layers for overflow:hidden frames even if
|
|
// they have a display port. The main purpose of the WantAsyncScroll check
|
|
// is to allow the B2G camera app to use hardware composer for compositing.
|
|
return LayerManager::SCROLLABLE;
|
|
}
|
|
}
|
|
return LayerManager::NONE;
|
|
}
|
|
|
|
already_AddRefed<PaintedLayer>
|
|
ContainerState::AttemptToRecyclePaintedLayer(AnimatedGeometryRoot* aAnimatedGeometryRoot,
|
|
nsDisplayItem* aItem,
|
|
const nsPoint& aTopLeft)
|
|
{
|
|
Layer* oldLayer = mLayerBuilder->GetOldLayerFor(aItem);
|
|
if (!oldLayer || !oldLayer->AsPaintedLayer() ||
|
|
!mPaintedLayersAvailableForRecycling.Contains(oldLayer->AsPaintedLayer())) {
|
|
return nullptr;
|
|
}
|
|
|
|
// Try to recycle a layer
|
|
RefPtr<PaintedLayer> layer = oldLayer->AsPaintedLayer();
|
|
mPaintedLayersAvailableForRecycling.RemoveEntry(layer);
|
|
|
|
// Check if the layer hint has changed and whether or not the layer should
|
|
// be recreated because of it.
|
|
if (!layer->IsOptimizedFor(GetLayerCreationHint(aAnimatedGeometryRoot))) {
|
|
return nullptr;
|
|
}
|
|
|
|
bool didResetScrollPositionForLayerPixelAlignment = false;
|
|
PaintedDisplayItemLayerUserData* data =
|
|
RecyclePaintedLayer(layer, aAnimatedGeometryRoot,
|
|
didResetScrollPositionForLayerPixelAlignment);
|
|
PreparePaintedLayerForUse(layer, data, aAnimatedGeometryRoot, aItem->ReferenceFrame(),
|
|
aTopLeft,
|
|
didResetScrollPositionForLayerPixelAlignment);
|
|
|
|
return layer.forget();
|
|
}
|
|
|
|
already_AddRefed<PaintedLayer>
|
|
ContainerState::CreatePaintedLayer(PaintedLayerData* aData)
|
|
{
|
|
LayerManager::PaintedLayerCreationHint creationHint =
|
|
GetLayerCreationHint(aData->mAnimatedGeometryRoot);
|
|
|
|
// Create a new painted layer
|
|
RefPtr<PaintedLayer> layer = mManager->CreatePaintedLayerWithHint(creationHint);
|
|
if (!layer) {
|
|
return nullptr;
|
|
}
|
|
|
|
// Mark this layer as being used for painting display items
|
|
PaintedDisplayItemLayerUserData* userData = new PaintedDisplayItemLayerUserData();
|
|
layer->SetUserData(&gPaintedDisplayItemLayerUserData, userData);
|
|
ResetScrollPositionForLayerPixelAlignment(aData->mAnimatedGeometryRoot);
|
|
|
|
PreparePaintedLayerForUse(layer, userData, aData->mAnimatedGeometryRoot,
|
|
aData->mReferenceFrame,
|
|
aData->mAnimatedGeometryRootOffset, true);
|
|
|
|
return layer.forget();
|
|
}
|
|
|
|
PaintedDisplayItemLayerUserData*
|
|
ContainerState::RecyclePaintedLayer(PaintedLayer* aLayer,
|
|
AnimatedGeometryRoot* aAnimatedGeometryRoot,
|
|
bool& didResetScrollPositionForLayerPixelAlignment)
|
|
{
|
|
// Clear clip rect and mask layer so we don't accidentally stay clipped.
|
|
// We will reapply any necessary clipping.
|
|
aLayer->SetMaskLayer(nullptr);
|
|
aLayer->SetAncestorMaskLayers({});
|
|
aLayer->ClearExtraDumpInfo();
|
|
|
|
PaintedDisplayItemLayerUserData* data =
|
|
static_cast<PaintedDisplayItemLayerUserData*>(
|
|
aLayer->GetUserData(&gPaintedDisplayItemLayerUserData));
|
|
NS_ASSERTION(data, "Recycled PaintedLayers must have user data");
|
|
|
|
// This gets called on recycled PaintedLayers that are going to be in the
|
|
// final layer tree, so it's a convenient time to invalidate the
|
|
// content that changed where we don't know what PaintedLayer it belonged
|
|
// to, or if we need to invalidate the entire layer, we can do that.
|
|
// This needs to be done before we update the PaintedLayer to its new
|
|
// transform. See nsGfxScrollFrame::InvalidateInternal, where
|
|
// we ensure that mInvalidPaintedContent is updated according to the
|
|
// scroll position as of the most recent paint.
|
|
if (!FuzzyEqual(data->mXScale, mParameters.mXScale, 0.00001f) ||
|
|
!FuzzyEqual(data->mYScale, mParameters.mYScale, 0.00001f) ||
|
|
data->mAppUnitsPerDevPixel != mAppUnitsPerDevPixel) {
|
|
#ifdef MOZ_DUMP_PAINTING
|
|
if (nsLayoutUtils::InvalidationDebuggingIsEnabled()) {
|
|
printf_stderr("Recycled layer %p changed scale\n", aLayer);
|
|
}
|
|
#endif
|
|
InvalidateEntirePaintedLayer(aLayer, aAnimatedGeometryRoot, "recycled layer changed state");
|
|
didResetScrollPositionForLayerPixelAlignment = true;
|
|
}
|
|
if (!data->mRegionToInvalidate.IsEmpty()) {
|
|
#ifdef MOZ_DUMP_PAINTING
|
|
if (nsLayoutUtils::InvalidationDebuggingIsEnabled()) {
|
|
printf_stderr("Invalidating deleted frame content from layer %p\n", aLayer);
|
|
}
|
|
#endif
|
|
aLayer->InvalidateRegion(data->mRegionToInvalidate);
|
|
#ifdef MOZ_DUMP_PAINTING
|
|
if (nsLayoutUtils::InvalidationDebuggingIsEnabled()) {
|
|
nsAutoCString str;
|
|
AppendToString(str, data->mRegionToInvalidate);
|
|
printf_stderr("Invalidating layer %p: %s\n", aLayer, str.get());
|
|
}
|
|
#endif
|
|
data->mRegionToInvalidate.SetEmpty();
|
|
}
|
|
return data;
|
|
}
|
|
|
|
void
|
|
ContainerState::PreparePaintedLayerForUse(PaintedLayer* aLayer,
|
|
PaintedDisplayItemLayerUserData* aData,
|
|
AnimatedGeometryRoot* aAnimatedGeometryRoot,
|
|
const nsIFrame* aReferenceFrame,
|
|
const nsPoint& aTopLeft,
|
|
bool didResetScrollPositionForLayerPixelAlignment)
|
|
{
|
|
aData->mXScale = mParameters.mXScale;
|
|
aData->mYScale = mParameters.mYScale;
|
|
aData->mLastAnimatedGeometryRootOrigin = aData->mAnimatedGeometryRootOrigin;
|
|
aData->mAnimatedGeometryRootOrigin = aTopLeft;
|
|
aData->mAppUnitsPerDevPixel = mAppUnitsPerDevPixel;
|
|
aLayer->SetAllowResidualTranslation(mParameters.AllowResidualTranslation());
|
|
|
|
mLayerBuilder->SavePreviousDataForLayer(aLayer, aData->mMaskClipCount);
|
|
|
|
// Set up transform so that 0,0 in the PaintedLayer corresponds to the
|
|
// (pixel-snapped) top-left of the aAnimatedGeometryRoot.
|
|
nsPoint offset = (*aAnimatedGeometryRoot)->GetOffsetToCrossDoc(aReferenceFrame);
|
|
nscoord appUnitsPerDevPixel = (*aAnimatedGeometryRoot)->PresContext()->AppUnitsPerDevPixel();
|
|
gfxPoint scaledOffset(
|
|
NSAppUnitsToDoublePixels(offset.x, appUnitsPerDevPixel)*mParameters.mXScale,
|
|
NSAppUnitsToDoublePixels(offset.y, appUnitsPerDevPixel)*mParameters.mYScale);
|
|
// We call RoundToMatchResidual here so that the residual after rounding
|
|
// is close to aData->mAnimatedGeometryRootPosition if possible.
|
|
nsIntPoint pixOffset(RoundToMatchResidual(scaledOffset.x, aData->mAnimatedGeometryRootPosition.x),
|
|
RoundToMatchResidual(scaledOffset.y, aData->mAnimatedGeometryRootPosition.y));
|
|
aData->mTranslation = pixOffset;
|
|
pixOffset += mParameters.mOffset;
|
|
Matrix matrix = Matrix::Translation(pixOffset.x, pixOffset.y);
|
|
aLayer->SetBaseTransform(Matrix4x4::From2D(matrix));
|
|
|
|
aData->mVisibilityComputedRegion.SetEmpty();
|
|
|
|
// FIXME: Temporary workaround for bug 681192 and bug 724786.
|
|
#ifndef MOZ_WIDGET_ANDROID
|
|
// Calculate exact position of the top-left of the active scrolled root.
|
|
// This might not be 0,0 due to the snapping in ScaleToNearestPixels.
|
|
gfxPoint animatedGeometryRootTopLeft = scaledOffset - ThebesPoint(matrix.GetTranslation()) + mParameters.mOffset;
|
|
// If it has changed, then we need to invalidate the entire layer since the
|
|
// pixels in the layer buffer have the content at a (subpixel) offset
|
|
// from what we need.
|
|
if (!animatedGeometryRootTopLeft.WithinEpsilonOf(aData->mAnimatedGeometryRootPosition, SUBPIXEL_OFFSET_EPSILON)) {
|
|
aData->mAnimatedGeometryRootPosition = animatedGeometryRootTopLeft;
|
|
InvalidateEntirePaintedLayer(aLayer, aAnimatedGeometryRoot, "subpixel offset");
|
|
} else if (didResetScrollPositionForLayerPixelAlignment) {
|
|
aData->mAnimatedGeometryRootPosition = animatedGeometryRootTopLeft;
|
|
}
|
|
#else
|
|
Unused << didResetScrollPositionForLayerPixelAlignment;
|
|
#endif
|
|
}
|
|
|
|
#if defined(DEBUG) || defined(MOZ_DUMP_PAINTING)
|
|
/**
|
|
* Returns the appunits per dev pixel for the item's frame
|
|
*/
|
|
static int32_t
|
|
AppUnitsPerDevPixel(nsDisplayItem* aItem)
|
|
{
|
|
// The underlying frame for zoom items is the root frame of the subdocument.
|
|
// But zoom display items report their bounds etc using the parent document's
|
|
// APD because zoom items act as a conversion layer between the two different
|
|
// APDs.
|
|
if (aItem->GetType() == nsDisplayItem::TYPE_ZOOM) {
|
|
return static_cast<nsDisplayZoom*>(aItem)->GetParentAppUnitsPerDevPixel();
|
|
}
|
|
return aItem->Frame()->PresContext()->AppUnitsPerDevPixel();
|
|
}
|
|
#endif
|
|
|
|
/**
|
|
* Set the visible region for aLayer.
|
|
* aOuterVisibleRegion is the visible region relative to the parent layer.
|
|
* aLayerContentsVisibleRect, if non-null, is a rectangle in the layer's
|
|
* own coordinate system to which the layer's visible region is restricted.
|
|
* Consumes *aOuterVisibleRegion.
|
|
*/
|
|
static void
|
|
SetOuterVisibleRegion(Layer* aLayer, nsIntRegion* aOuterVisibleRegion,
|
|
const nsIntRect* aLayerContentsVisibleRect = nullptr,
|
|
bool aOuterUntransformed = false)
|
|
{
|
|
Matrix4x4 transform = aLayer->GetTransform();
|
|
Matrix transform2D;
|
|
if (aOuterUntransformed) {
|
|
if (aLayerContentsVisibleRect) {
|
|
aOuterVisibleRegion->And(*aOuterVisibleRegion,
|
|
*aLayerContentsVisibleRect);
|
|
}
|
|
} else if (transform.Is2D(&transform2D) && !transform2D.HasNonIntegerTranslation()) {
|
|
aOuterVisibleRegion->MoveBy(-int(transform2D._31), -int(transform2D._32));
|
|
if (aLayerContentsVisibleRect) {
|
|
aOuterVisibleRegion->And(*aOuterVisibleRegion, *aLayerContentsVisibleRect);
|
|
}
|
|
} else {
|
|
nsIntRect outerRect = aOuterVisibleRegion->GetBounds();
|
|
// if 'transform' is not invertible, then nothing will be displayed
|
|
// for the layer, so it doesn't really matter what we do here
|
|
Rect outerVisible(outerRect.x, outerRect.y, outerRect.width, outerRect.height);
|
|
transform.Invert();
|
|
|
|
Rect layerContentsVisible(-float(INT32_MAX) / 2, -float(INT32_MAX) / 2,
|
|
float(INT32_MAX), float(INT32_MAX));
|
|
if (aLayerContentsVisibleRect) {
|
|
NS_ASSERTION(aLayerContentsVisibleRect->width >= 0 &&
|
|
aLayerContentsVisibleRect->height >= 0,
|
|
"Bad layer contents rectangle");
|
|
// restrict to aLayerContentsVisibleRect before call GfxRectToIntRect,
|
|
// in case layerVisible is extremely large (as it can be when
|
|
// projecting through the inverse of a 3D transform)
|
|
layerContentsVisible = Rect(
|
|
aLayerContentsVisibleRect->x, aLayerContentsVisibleRect->y,
|
|
aLayerContentsVisibleRect->width, aLayerContentsVisibleRect->height);
|
|
}
|
|
gfxRect layerVisible = ThebesRect(transform.ProjectRectBounds(outerVisible, layerContentsVisible));
|
|
layerVisible.RoundOut();
|
|
nsIntRect visRect;
|
|
if (gfxUtils::GfxRectToIntRect(layerVisible, &visRect)) {
|
|
*aOuterVisibleRegion = visRect;
|
|
} else {
|
|
aOuterVisibleRegion->SetEmpty();
|
|
}
|
|
}
|
|
|
|
aLayer->SetVisibleRegion(LayerIntRegion::FromUnknownRegion(*aOuterVisibleRegion));
|
|
}
|
|
|
|
void
|
|
ContainerState::SetOuterVisibleRegionForLayer(Layer* aLayer,
|
|
const nsIntRegion& aOuterVisibleRegion,
|
|
const nsIntRect* aLayerContentsVisibleRect,
|
|
bool aOuterUntransformed) const
|
|
{
|
|
nsIntRegion visRegion = aOuterVisibleRegion;
|
|
if (!aOuterUntransformed) {
|
|
visRegion.MoveBy(mParameters.mOffset);
|
|
}
|
|
SetOuterVisibleRegion(aLayer, &visRegion, aLayerContentsVisibleRect,
|
|
aOuterUntransformed);
|
|
}
|
|
|
|
nscolor
|
|
ContainerState::FindOpaqueBackgroundColorInLayer(const PaintedLayerData* aData,
|
|
const nsIntRect& aRect,
|
|
bool* aOutIntersectsLayer) const
|
|
{
|
|
*aOutIntersectsLayer = true;
|
|
|
|
// Scan the candidate's display items.
|
|
nsIntRect deviceRect = aRect;
|
|
nsRect appUnitRect = ToAppUnits(deviceRect, mAppUnitsPerDevPixel);
|
|
appUnitRect.ScaleInverseRoundOut(mParameters.mXScale, mParameters.mYScale);
|
|
|
|
for (auto& assignedItem : Reversed(aData->mAssignedDisplayItems)) {
|
|
nsDisplayItem* item = assignedItem.mItem;
|
|
bool snap;
|
|
nsRect bounds = item->GetBounds(mBuilder, &snap);
|
|
if (snap && mSnappingEnabled) {
|
|
nsIntRect snappedBounds = ScaleToNearestPixels(bounds);
|
|
if (!snappedBounds.Intersects(deviceRect))
|
|
continue;
|
|
|
|
if (!snappedBounds.Contains(deviceRect))
|
|
return NS_RGBA(0,0,0,0);
|
|
|
|
} else {
|
|
// The layer's visible rect is already (close enough to) pixel
|
|
// aligned, so no need to round out and in here.
|
|
if (!bounds.Intersects(appUnitRect))
|
|
continue;
|
|
|
|
if (!bounds.Contains(appUnitRect))
|
|
return NS_RGBA(0,0,0,0);
|
|
}
|
|
|
|
if (item->IsInvisibleInRect(appUnitRect)) {
|
|
continue;
|
|
}
|
|
|
|
if (assignedItem.mClip.IsRectAffectedByClip(deviceRect,
|
|
mParameters.mXScale,
|
|
mParameters.mYScale,
|
|
mAppUnitsPerDevPixel)) {
|
|
return NS_RGBA(0,0,0,0);
|
|
}
|
|
|
|
Maybe<nscolor> color = item->IsUniform(mBuilder);
|
|
if (color && NS_GET_A(*color) == 255)
|
|
return *color;
|
|
|
|
return NS_RGBA(0,0,0,0);
|
|
}
|
|
|
|
*aOutIntersectsLayer = false;
|
|
return NS_RGBA(0,0,0,0);
|
|
}
|
|
|
|
nscolor
|
|
PaintedLayerDataNode::FindOpaqueBackgroundColor(const nsIntRegion& aTargetVisibleRegion,
|
|
int32_t aUnderIndex) const
|
|
{
|
|
if (aUnderIndex == ABOVE_TOP) {
|
|
aUnderIndex = mPaintedLayerDataStack.Length();
|
|
}
|
|
for (int32_t i = aUnderIndex - 1; i >= 0; --i) {
|
|
const PaintedLayerData* candidate = &mPaintedLayerDataStack[i];
|
|
if (candidate->VisibleAboveRegionIntersects(aTargetVisibleRegion)) {
|
|
// Some non-PaintedLayer content between target and candidate; this is
|
|
// hopeless
|
|
return NS_RGBA(0,0,0,0);
|
|
}
|
|
|
|
if (!candidate->VisibleRegionIntersects(aTargetVisibleRegion)) {
|
|
// The layer doesn't intersect our target, ignore it and move on
|
|
continue;
|
|
}
|
|
|
|
bool intersectsLayer = true;
|
|
nsIntRect rect = aTargetVisibleRegion.GetBounds();
|
|
nscolor color = mTree.ContState().FindOpaqueBackgroundColorInLayer(
|
|
candidate, rect, &intersectsLayer);
|
|
if (!intersectsLayer) {
|
|
continue;
|
|
}
|
|
return color;
|
|
}
|
|
if (mAllDrawingAboveBackground ||
|
|
!mVisibleAboveBackgroundRegion.Intersect(aTargetVisibleRegion).IsEmpty()) {
|
|
// Some non-PaintedLayer content is between this node's background and target.
|
|
return NS_RGBA(0,0,0,0);
|
|
}
|
|
return FindOpaqueBackgroundColorInParentNode();
|
|
}
|
|
|
|
nscolor
|
|
PaintedLayerDataNode::FindOpaqueBackgroundColorCoveringEverything() const
|
|
{
|
|
if (!mPaintedLayerDataStack.IsEmpty() ||
|
|
mAllDrawingAboveBackground ||
|
|
!mVisibleAboveBackgroundRegion.IsEmpty()) {
|
|
return NS_RGBA(0,0,0,0);
|
|
}
|
|
return FindOpaqueBackgroundColorInParentNode();
|
|
}
|
|
|
|
nscolor
|
|
PaintedLayerDataNode::FindOpaqueBackgroundColorInParentNode() const
|
|
{
|
|
if (mParent) {
|
|
if (mHasClip) {
|
|
// Check whether our parent node has uniform content behind our whole
|
|
// clip.
|
|
// There's one tricky case here: If our parent node is also a scrollable,
|
|
// and is currently scrolled in such a way that this inner one is
|
|
// clipped by it, then it's not really clear how we should determine
|
|
// whether we have a uniform background in the parent: There might be
|
|
// non-uniform content in the parts that our scroll port covers in the
|
|
// parent and that are currently outside the parent's clip.
|
|
// For now, we'll fail to pull a background color in that case.
|
|
return mParent->FindOpaqueBackgroundColor(mClipRect);
|
|
}
|
|
return mParent->FindOpaqueBackgroundColorCoveringEverything();
|
|
}
|
|
// We are the root.
|
|
return mTree.UniformBackgroundColor();
|
|
}
|
|
|
|
void
|
|
PaintedLayerData::UpdateCommonClipCount(
|
|
const DisplayItemClip& aCurrentClip)
|
|
{
|
|
if (mCommonClipCount >= 0) {
|
|
mCommonClipCount = mItemClip.GetCommonRoundedRectCount(aCurrentClip, mCommonClipCount);
|
|
} else {
|
|
// first item in the layer
|
|
mCommonClipCount = aCurrentClip.GetRoundedRectCount();
|
|
}
|
|
}
|
|
|
|
bool
|
|
PaintedLayerData::CanOptimizeToImageLayer(nsDisplayListBuilder* aBuilder)
|
|
{
|
|
if (!mImage) {
|
|
return false;
|
|
}
|
|
|
|
return mImage->CanOptimizeToImageLayer(mLayer->Manager(), aBuilder);
|
|
}
|
|
|
|
already_AddRefed<ImageContainer>
|
|
PaintedLayerData::GetContainerForImageLayer(nsDisplayListBuilder* aBuilder)
|
|
{
|
|
if (!mImage) {
|
|
return nullptr;
|
|
}
|
|
|
|
return mImage->GetContainer(mLayer->Manager(), aBuilder);
|
|
}
|
|
|
|
PaintedLayerDataNode::PaintedLayerDataNode(PaintedLayerDataTree& aTree,
|
|
PaintedLayerDataNode* aParent,
|
|
AnimatedGeometryRoot* aAnimatedGeometryRoot)
|
|
: mTree(aTree)
|
|
, mParent(aParent)
|
|
, mAnimatedGeometryRoot(aAnimatedGeometryRoot)
|
|
, mAllDrawingAboveBackground(false)
|
|
{
|
|
MOZ_ASSERT(nsLayoutUtils::IsAncestorFrameCrossDoc(mTree.Builder()->RootReferenceFrame(), *mAnimatedGeometryRoot));
|
|
mHasClip = mTree.IsClippedWithRespectToParentAnimatedGeometryRoot(mAnimatedGeometryRoot, &mClipRect);
|
|
}
|
|
|
|
PaintedLayerDataNode::~PaintedLayerDataNode()
|
|
{
|
|
MOZ_ASSERT(mPaintedLayerDataStack.IsEmpty());
|
|
MOZ_ASSERT(mChildren.IsEmpty());
|
|
}
|
|
|
|
PaintedLayerDataNode*
|
|
PaintedLayerDataNode::AddChildNodeFor(AnimatedGeometryRoot* aAnimatedGeometryRoot)
|
|
{
|
|
MOZ_ASSERT(aAnimatedGeometryRoot->mParentAGR == mAnimatedGeometryRoot);
|
|
UniquePtr<PaintedLayerDataNode> child =
|
|
MakeUnique<PaintedLayerDataNode>(mTree, this, aAnimatedGeometryRoot);
|
|
mChildren.AppendElement(Move(child));
|
|
return mChildren.LastElement().get();
|
|
}
|
|
|
|
template<typename NewPaintedLayerCallbackType>
|
|
PaintedLayerData*
|
|
PaintedLayerDataNode::FindPaintedLayerFor(const nsIntRect& aVisibleRect,
|
|
bool aBackfaceHidden,
|
|
const DisplayItemScrollClip* aScrollClip,
|
|
NewPaintedLayerCallbackType aNewPaintedLayerCallback)
|
|
{
|
|
if (!mPaintedLayerDataStack.IsEmpty()) {
|
|
PaintedLayerData* lowestUsableLayer = nullptr;
|
|
for (auto& data : Reversed(mPaintedLayerDataStack)) {
|
|
if (data.mVisibleAboveRegion.Intersects(aVisibleRect)) {
|
|
break;
|
|
}
|
|
if (data.mBackfaceHidden == aBackfaceHidden &&
|
|
data.mScrollClip == aScrollClip) {
|
|
lowestUsableLayer = &data;
|
|
}
|
|
nsIntRegion visibleRegion = data.mVisibleRegion;
|
|
// Also check whether the event-regions intersect the visible rect,
|
|
// unless we're in an inactive layer, in which case the event-regions
|
|
// will be hoisted out into their own layer.
|
|
// For performance reasons, we check the intersection with the bounds
|
|
// of the event-regions.
|
|
if (!mTree.ContState().IsInInactiveLayer() &&
|
|
(data.mScaledHitRegionBounds.Intersects(aVisibleRect) ||
|
|
data.mScaledMaybeHitRegionBounds.Intersects(aVisibleRect))) {
|
|
break;
|
|
}
|
|
if (visibleRegion.Intersects(aVisibleRect)) {
|
|
break;
|
|
}
|
|
}
|
|
if (lowestUsableLayer) {
|
|
return lowestUsableLayer;
|
|
}
|
|
}
|
|
return mPaintedLayerDataStack.AppendElement(aNewPaintedLayerCallback());
|
|
}
|
|
|
|
void
|
|
PaintedLayerDataNode::FinishChildrenIntersecting(const nsIntRect& aRect)
|
|
{
|
|
for (int32_t i = mChildren.Length() - 1; i >= 0; i--) {
|
|
if (mChildren[i]->Intersects(aRect)) {
|
|
mChildren[i]->Finish(true);
|
|
mChildren.RemoveElementAt(i);
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
PaintedLayerDataNode::FinishAllChildren(bool aThisNodeNeedsAccurateVisibleAboveRegion)
|
|
{
|
|
for (int32_t i = mChildren.Length() - 1; i >= 0; i--) {
|
|
mChildren[i]->Finish(aThisNodeNeedsAccurateVisibleAboveRegion);
|
|
}
|
|
mChildren.Clear();
|
|
}
|
|
|
|
void
|
|
PaintedLayerDataNode::Finish(bool aParentNeedsAccurateVisibleAboveRegion)
|
|
{
|
|
// Skip "visible above region" maintenance, because this node is going away.
|
|
FinishAllChildren(false);
|
|
|
|
PopAllPaintedLayerData();
|
|
|
|
if (mParent && aParentNeedsAccurateVisibleAboveRegion) {
|
|
if (mHasClip) {
|
|
mParent->AddToVisibleAboveRegion(mClipRect);
|
|
} else {
|
|
mParent->SetAllDrawingAbove();
|
|
}
|
|
}
|
|
mTree.NodeWasFinished(mAnimatedGeometryRoot);
|
|
}
|
|
|
|
void
|
|
PaintedLayerDataNode::AddToVisibleAboveRegion(const nsIntRect& aRect)
|
|
{
|
|
nsIntRegion& visibleAboveRegion = mPaintedLayerDataStack.IsEmpty()
|
|
? mVisibleAboveBackgroundRegion
|
|
: mPaintedLayerDataStack.LastElement().mVisibleAboveRegion;
|
|
visibleAboveRegion.Or(visibleAboveRegion, aRect);
|
|
visibleAboveRegion.SimplifyOutward(8);
|
|
}
|
|
|
|
void
|
|
PaintedLayerDataNode::SetAllDrawingAbove()
|
|
{
|
|
PopAllPaintedLayerData();
|
|
mAllDrawingAboveBackground = true;
|
|
mVisibleAboveBackgroundRegion.SetEmpty();
|
|
}
|
|
|
|
void
|
|
PaintedLayerDataNode::PopPaintedLayerData()
|
|
{
|
|
MOZ_ASSERT(!mPaintedLayerDataStack.IsEmpty());
|
|
size_t lastIndex = mPaintedLayerDataStack.Length() - 1;
|
|
PaintedLayerData& data = mPaintedLayerDataStack[lastIndex];
|
|
mTree.ContState().FinishPaintedLayerData(data, [this, &data, lastIndex]() {
|
|
return this->FindOpaqueBackgroundColor(data.mVisibleRegion, lastIndex);
|
|
});
|
|
mPaintedLayerDataStack.RemoveElementAt(lastIndex);
|
|
}
|
|
|
|
void
|
|
PaintedLayerDataNode::PopAllPaintedLayerData()
|
|
{
|
|
while (!mPaintedLayerDataStack.IsEmpty()) {
|
|
PopPaintedLayerData();
|
|
}
|
|
}
|
|
|
|
nsDisplayListBuilder*
|
|
PaintedLayerDataTree::Builder() const
|
|
{
|
|
return mContainerState.Builder();
|
|
}
|
|
|
|
void
|
|
PaintedLayerDataTree::Finish()
|
|
{
|
|
if (mRoot) {
|
|
mRoot->Finish(false);
|
|
}
|
|
MOZ_ASSERT(mNodes.Count() == 0);
|
|
mRoot = nullptr;
|
|
}
|
|
|
|
void
|
|
PaintedLayerDataTree::NodeWasFinished(AnimatedGeometryRoot* aAnimatedGeometryRoot)
|
|
{
|
|
mNodes.Remove(aAnimatedGeometryRoot);
|
|
}
|
|
|
|
void
|
|
PaintedLayerDataTree::AddingOwnLayer(AnimatedGeometryRoot* aAnimatedGeometryRoot,
|
|
const nsIntRect* aRect,
|
|
nscolor* aOutUniformBackgroundColor)
|
|
{
|
|
FinishPotentiallyIntersectingNodes(aAnimatedGeometryRoot, aRect);
|
|
PaintedLayerDataNode* node = EnsureNodeFor(aAnimatedGeometryRoot);
|
|
if (aRect) {
|
|
if (aOutUniformBackgroundColor) {
|
|
*aOutUniformBackgroundColor = node->FindOpaqueBackgroundColor(*aRect);
|
|
}
|
|
node->AddToVisibleAboveRegion(*aRect);
|
|
} else {
|
|
if (aOutUniformBackgroundColor) {
|
|
*aOutUniformBackgroundColor = node->FindOpaqueBackgroundColorCoveringEverything();
|
|
}
|
|
node->SetAllDrawingAbove();
|
|
}
|
|
}
|
|
|
|
template<typename NewPaintedLayerCallbackType>
|
|
PaintedLayerData*
|
|
PaintedLayerDataTree::FindPaintedLayerFor(AnimatedGeometryRoot* aAnimatedGeometryRoot,
|
|
const DisplayItemScrollClip* aScrollClip,
|
|
const nsIntRect& aVisibleRect,
|
|
bool aBackfaceHidden,
|
|
NewPaintedLayerCallbackType aNewPaintedLayerCallback)
|
|
{
|
|
const nsIntRect* bounds = &aVisibleRect;
|
|
FinishPotentiallyIntersectingNodes(aAnimatedGeometryRoot, bounds);
|
|
PaintedLayerDataNode* node = EnsureNodeFor(aAnimatedGeometryRoot);
|
|
|
|
PaintedLayerData* data =
|
|
node->FindPaintedLayerFor(aVisibleRect, aBackfaceHidden, aScrollClip,
|
|
aNewPaintedLayerCallback);
|
|
return data;
|
|
}
|
|
|
|
void
|
|
PaintedLayerDataTree::FinishPotentiallyIntersectingNodes(AnimatedGeometryRoot* aAnimatedGeometryRoot,
|
|
const nsIntRect* aRect)
|
|
{
|
|
AnimatedGeometryRoot* ancestorThatIsChildOfCommonAncestor = nullptr;
|
|
PaintedLayerDataNode* ancestorNode =
|
|
FindNodeForAncestorAnimatedGeometryRoot(aAnimatedGeometryRoot,
|
|
&ancestorThatIsChildOfCommonAncestor);
|
|
if (!ancestorNode) {
|
|
// None of our ancestors are in the tree. This should only happen if this
|
|
// is the very first item we're looking at.
|
|
MOZ_ASSERT(!mRoot);
|
|
return;
|
|
}
|
|
|
|
if (ancestorNode->GetAnimatedGeometryRoot() == aAnimatedGeometryRoot) {
|
|
// aAnimatedGeometryRoot already has a node in the tree.
|
|
// This is the common case.
|
|
MOZ_ASSERT(!ancestorThatIsChildOfCommonAncestor);
|
|
if (aRect) {
|
|
ancestorNode->FinishChildrenIntersecting(*aRect);
|
|
} else {
|
|
ancestorNode->FinishAllChildren();
|
|
}
|
|
return;
|
|
}
|
|
|
|
// We have found an existing ancestor, but it's a proper ancestor of our
|
|
// animated geometry root.
|
|
// ancestorThatIsChildOfCommonAncestor is the last animated geometry root
|
|
// encountered on the way up from aAnimatedGeometryRoot to ancestorNode.
|
|
MOZ_ASSERT(ancestorThatIsChildOfCommonAncestor);
|
|
MOZ_ASSERT(nsLayoutUtils::IsAncestorFrameCrossDoc(*ancestorThatIsChildOfCommonAncestor, *aAnimatedGeometryRoot));
|
|
MOZ_ASSERT(ancestorThatIsChildOfCommonAncestor->mParentAGR == ancestorNode->GetAnimatedGeometryRoot());
|
|
|
|
// ancestorThatIsChildOfCommonAncestor is not in the tree yet!
|
|
MOZ_ASSERT(!mNodes.Get(ancestorThatIsChildOfCommonAncestor));
|
|
|
|
// We're about to add a node for ancestorThatIsChildOfCommonAncestor, so we
|
|
// finish all intersecting siblings.
|
|
nsIntRect clip;
|
|
if (IsClippedWithRespectToParentAnimatedGeometryRoot(ancestorThatIsChildOfCommonAncestor, &clip)) {
|
|
ancestorNode->FinishChildrenIntersecting(clip);
|
|
} else {
|
|
ancestorNode->FinishAllChildren();
|
|
}
|
|
}
|
|
|
|
PaintedLayerDataNode*
|
|
PaintedLayerDataTree::EnsureNodeFor(AnimatedGeometryRoot* aAnimatedGeometryRoot)
|
|
{
|
|
MOZ_ASSERT(aAnimatedGeometryRoot);
|
|
PaintedLayerDataNode* node = mNodes.Get(aAnimatedGeometryRoot);
|
|
if (node) {
|
|
return node;
|
|
}
|
|
|
|
AnimatedGeometryRoot* parentAnimatedGeometryRoot = aAnimatedGeometryRoot->mParentAGR;
|
|
if (!parentAnimatedGeometryRoot) {
|
|
MOZ_ASSERT(!mRoot);
|
|
MOZ_ASSERT(*aAnimatedGeometryRoot == Builder()->RootReferenceFrame());
|
|
mRoot = MakeUnique<PaintedLayerDataNode>(*this, nullptr, aAnimatedGeometryRoot);
|
|
node = mRoot.get();
|
|
} else {
|
|
PaintedLayerDataNode* parentNode = EnsureNodeFor(parentAnimatedGeometryRoot);
|
|
MOZ_ASSERT(parentNode);
|
|
node = parentNode->AddChildNodeFor(aAnimatedGeometryRoot);
|
|
}
|
|
MOZ_ASSERT(node);
|
|
mNodes.Put(aAnimatedGeometryRoot, node);
|
|
return node;
|
|
}
|
|
|
|
bool
|
|
PaintedLayerDataTree::IsClippedWithRespectToParentAnimatedGeometryRoot(AnimatedGeometryRoot* aAnimatedGeometryRoot,
|
|
nsIntRect* aOutClip)
|
|
{
|
|
nsIScrollableFrame* scrollableFrame = nsLayoutUtils::GetScrollableFrameFor(*aAnimatedGeometryRoot);
|
|
if (!scrollableFrame) {
|
|
return false;
|
|
}
|
|
nsIFrame* scrollFrame = do_QueryFrame(scrollableFrame);
|
|
nsRect scrollPort = scrollableFrame->GetScrollPortRect() + Builder()->ToReferenceFrame(scrollFrame);
|
|
*aOutClip = mContainerState.ScaleToNearestPixels(scrollPort);
|
|
return true;
|
|
}
|
|
|
|
PaintedLayerDataNode*
|
|
PaintedLayerDataTree::FindNodeForAncestorAnimatedGeometryRoot(AnimatedGeometryRoot* aAnimatedGeometryRoot,
|
|
AnimatedGeometryRoot** aOutAncestorChild)
|
|
{
|
|
if (!aAnimatedGeometryRoot) {
|
|
return nullptr;
|
|
}
|
|
PaintedLayerDataNode* node = mNodes.Get(aAnimatedGeometryRoot);
|
|
if (node) {
|
|
return node;
|
|
}
|
|
*aOutAncestorChild = aAnimatedGeometryRoot;
|
|
return FindNodeForAncestorAnimatedGeometryRoot(aAnimatedGeometryRoot->mParentAGR, aOutAncestorChild);
|
|
}
|
|
|
|
static bool
|
|
CanOptimizeAwayPaintedLayer(PaintedLayerData* aData,
|
|
FrameLayerBuilder* aLayerBuilder)
|
|
{
|
|
if (!aLayerBuilder->IsBuildingRetainedLayers()) {
|
|
return false;
|
|
}
|
|
|
|
// If there's no painted layer with valid content in it that we can reuse,
|
|
// always create a color or image layer (and potentially throw away an
|
|
// existing completely invalid painted layer).
|
|
if (aData->mLayer->GetValidRegion().IsEmpty()) {
|
|
return true;
|
|
}
|
|
|
|
// There is an existing painted layer we can reuse. Throwing it away can make
|
|
// compositing cheaper (see bug 946952), but it might cause us to re-allocate
|
|
// the painted layer frequently due to an animation. So we only discard it if
|
|
// we're in tree compression mode, which is triggered at a low frequency.
|
|
return aLayerBuilder->CheckInLayerTreeCompressionMode();
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
static int32_t FindIndexOfLayerIn(nsTArray<NewLayerEntry>& aArray,
|
|
Layer* aLayer)
|
|
{
|
|
for (uint32_t i = 0; i < aArray.Length(); ++i) {
|
|
if (aArray[i].mLayer == aLayer) {
|
|
return i;
|
|
}
|
|
}
|
|
return -1;
|
|
}
|
|
#endif
|
|
|
|
already_AddRefed<Layer>
|
|
ContainerState::PrepareImageLayer(PaintedLayerData* aData)
|
|
{
|
|
RefPtr<ImageContainer> imageContainer =
|
|
aData->GetContainerForImageLayer(mBuilder);
|
|
if (!imageContainer) {
|
|
return nullptr;
|
|
}
|
|
|
|
RefPtr<ImageLayer> imageLayer = CreateOrRecycleImageLayer(aData->mLayer);
|
|
imageLayer->SetContainer(imageContainer);
|
|
aData->mImage->ConfigureLayer(imageLayer, mParameters);
|
|
imageLayer->SetPostScale(mParameters.mXScale,
|
|
mParameters.mYScale);
|
|
|
|
if (aData->mItemClip.HasClip()) {
|
|
ParentLayerIntRect clip =
|
|
ViewAs<ParentLayerPixel>(ScaleToNearestPixels(aData->mItemClip.GetClipRect()));
|
|
clip.MoveBy(ViewAs<ParentLayerPixel>(mParameters.mOffset));
|
|
imageLayer->SetClipRect(Some(clip));
|
|
} else {
|
|
imageLayer->SetClipRect(Nothing());
|
|
}
|
|
|
|
mLayerBuilder->StoreOptimizedLayerForFrame(aData->mImage, imageLayer);
|
|
FLB_LOG_PAINTED_LAYER_DECISION(aData,
|
|
" Selected image layer=%p\n", imageLayer.get());
|
|
|
|
return imageLayer.forget();
|
|
}
|
|
|
|
already_AddRefed<Layer>
|
|
ContainerState::PrepareColorLayer(PaintedLayerData* aData)
|
|
{
|
|
RefPtr<ColorLayer> colorLayer = CreateOrRecycleColorLayer(aData->mLayer);
|
|
colorLayer->SetColor(Color::FromABGR(aData->mSolidColor));
|
|
|
|
// Copy transform
|
|
colorLayer->SetBaseTransform(aData->mLayer->GetBaseTransform());
|
|
colorLayer->SetPostScale(aData->mLayer->GetPostXScale(),
|
|
aData->mLayer->GetPostYScale());
|
|
|
|
nsIntRect visibleRect = aData->mVisibleRegion.GetBounds();
|
|
visibleRect.MoveBy(-GetTranslationForPaintedLayer(aData->mLayer));
|
|
colorLayer->SetBounds(visibleRect);
|
|
colorLayer->SetClipRect(Nothing());
|
|
|
|
FLB_LOG_PAINTED_LAYER_DECISION(aData,
|
|
" Selected color layer=%p\n", colorLayer.get());
|
|
|
|
return colorLayer.forget();
|
|
}
|
|
|
|
static void
|
|
SetBackfaceHiddenForLayer(bool aBackfaceHidden, Layer* aLayer)
|
|
{
|
|
if (aBackfaceHidden) {
|
|
aLayer->SetContentFlags(aLayer->GetContentFlags() |
|
|
Layer::CONTENT_BACKFACE_HIDDEN);
|
|
} else {
|
|
aLayer->SetContentFlags(aLayer->GetContentFlags() &
|
|
~Layer::CONTENT_BACKFACE_HIDDEN);
|
|
}
|
|
}
|
|
|
|
template<typename FindOpaqueBackgroundColorCallbackType>
|
|
void ContainerState::FinishPaintedLayerData(PaintedLayerData& aData, FindOpaqueBackgroundColorCallbackType aFindOpaqueBackgroundColor)
|
|
{
|
|
PaintedLayerData* data = &aData;
|
|
|
|
if (!data->mLayer) {
|
|
// No layer was recycled, so we create a new one.
|
|
RefPtr<PaintedLayer> paintedLayer = CreatePaintedLayer(data);
|
|
data->mLayer = paintedLayer;
|
|
|
|
NS_ASSERTION(FindIndexOfLayerIn(mNewChildLayers, paintedLayer) < 0,
|
|
"Layer already in list???");
|
|
mNewChildLayers[data->mNewChildLayersIndex].mLayer = paintedLayer.forget();
|
|
}
|
|
|
|
for (auto& item : data->mAssignedDisplayItems) {
|
|
MOZ_ASSERT(item.mItem->GetType() != nsDisplayItem::TYPE_LAYER_EVENT_REGIONS);
|
|
|
|
InvalidateForLayerChange(item.mItem, data->mLayer);
|
|
mLayerBuilder->AddPaintedDisplayItem(data, item.mItem, item.mClip,
|
|
*this, item.mLayerState,
|
|
data->mAnimatedGeometryRootOffset);
|
|
}
|
|
|
|
NewLayerEntry* newLayerEntry = &mNewChildLayers[data->mNewChildLayersIndex];
|
|
|
|
RefPtr<Layer> layer;
|
|
bool canOptimizeToImageLayer = data->CanOptimizeToImageLayer(mBuilder);
|
|
|
|
FLB_LOG_PAINTED_LAYER_DECISION(data, "Selecting layer for pld=%p\n", data);
|
|
FLB_LOG_PAINTED_LAYER_DECISION(data, " Solid=%i, hasImage=%c, canOptimizeAwayPaintedLayer=%i\n",
|
|
data->mIsSolidColorInVisibleRegion, canOptimizeToImageLayer ? 'y' : 'n',
|
|
CanOptimizeAwayPaintedLayer(data, mLayerBuilder));
|
|
|
|
if ((data->mIsSolidColorInVisibleRegion || canOptimizeToImageLayer) &&
|
|
CanOptimizeAwayPaintedLayer(data, mLayerBuilder)) {
|
|
NS_ASSERTION(!(data->mIsSolidColorInVisibleRegion && canOptimizeToImageLayer),
|
|
"Can't be a solid color as well as an image!");
|
|
|
|
layer = canOptimizeToImageLayer ? PrepareImageLayer(data)
|
|
: PrepareColorLayer(data);
|
|
|
|
if (layer) {
|
|
NS_ASSERTION(FindIndexOfLayerIn(mNewChildLayers, layer) < 0,
|
|
"Layer already in list???");
|
|
NS_ASSERTION(newLayerEntry->mLayer == data->mLayer,
|
|
"Painted layer at wrong index");
|
|
// Store optimized layer in reserved slot
|
|
newLayerEntry = &mNewChildLayers[data->mNewChildLayersIndex + 1];
|
|
NS_ASSERTION(!newLayerEntry->mLayer, "Slot already occupied?");
|
|
newLayerEntry->mLayer = layer;
|
|
newLayerEntry->mAnimatedGeometryRoot = data->mAnimatedGeometryRoot;
|
|
newLayerEntry->mScrollClip = data->mScrollClip;
|
|
newLayerEntry->mIsCaret = data->mIsCaret;
|
|
|
|
// Hide the PaintedLayer. We leave it in the layer tree so that we
|
|
// can find and recycle it later.
|
|
ParentLayerIntRect emptyRect;
|
|
data->mLayer->SetClipRect(Some(emptyRect));
|
|
data->mLayer->SetVisibleRegion(LayerIntRegion());
|
|
data->mLayer->InvalidateRegion(data->mLayer->GetValidRegion().GetBounds());
|
|
data->mLayer->SetEventRegions(EventRegions());
|
|
}
|
|
}
|
|
|
|
if (!layer) {
|
|
// We couldn't optimize to an image layer or a color layer above.
|
|
layer = data->mLayer;
|
|
layer->SetClipRect(Nothing());
|
|
FLB_LOG_PAINTED_LAYER_DECISION(data, " Selected painted layer=%p\n", layer.get());
|
|
}
|
|
|
|
// If the layer is a fixed background layer, the clip on the fixed background
|
|
// display item was not applied to the opaque region in
|
|
// ContainerState::ComputeOpaqueRect(), but was saved in data->mItemClip.
|
|
// Apply it to the opaque region now. Note that it's important to do this
|
|
// before the opaque region is propagated to the NewLayerEntry below.
|
|
if (!data->mClipMovesWithLayer && data->mItemClip.HasClip()) {
|
|
nsRect clipRect = data->mItemClip.GetClipRect();
|
|
nsRect insideRoundedCorners = data->mItemClip.ApproximateIntersectInward(clipRect);
|
|
nsIntRect insideRoundedCornersScaled = ScaleToInsidePixels(insideRoundedCorners);
|
|
data->mOpaqueRegion.AndWith(insideRoundedCornersScaled);
|
|
}
|
|
|
|
if (mLayerBuilder->IsBuildingRetainedLayers()) {
|
|
newLayerEntry->mVisibleRegion = data->mVisibleRegion;
|
|
newLayerEntry->mOpaqueRegion = data->mOpaqueRegion;
|
|
newLayerEntry->mHideAllLayersBelow = data->mHideAllLayersBelow;
|
|
newLayerEntry->mOpaqueForAnimatedGeometryRootParent = data->mOpaqueForAnimatedGeometryRootParent;
|
|
} else {
|
|
SetOuterVisibleRegionForLayer(layer, data->mVisibleRegion);
|
|
}
|
|
|
|
nsIntRect layerBounds = data->mBounds;
|
|
layerBounds.MoveBy(-GetTranslationForPaintedLayer(data->mLayer));
|
|
layer->SetLayerBounds(layerBounds);
|
|
|
|
#ifdef MOZ_DUMP_PAINTING
|
|
if (!data->mLog.IsEmpty()) {
|
|
if (PaintedLayerData* containingPld = mLayerBuilder->GetContainingPaintedLayerData()) {
|
|
containingPld->mLayer->AddExtraDumpInfo(nsCString(data->mLog));
|
|
} else {
|
|
layer->AddExtraDumpInfo(nsCString(data->mLog));
|
|
}
|
|
}
|
|
#endif
|
|
|
|
nsIntRegion transparentRegion;
|
|
transparentRegion.Sub(data->mVisibleRegion, data->mOpaqueRegion);
|
|
bool isOpaque = transparentRegion.IsEmpty();
|
|
// For translucent PaintedLayers, try to find an opaque background
|
|
// color that covers the entire area beneath it so we can pull that
|
|
// color into this layer to make it opaque.
|
|
if (layer == data->mLayer) {
|
|
nscolor backgroundColor = NS_RGBA(0,0,0,0);
|
|
if (!isOpaque) {
|
|
backgroundColor = aFindOpaqueBackgroundColor();
|
|
if (NS_GET_A(backgroundColor) == 255) {
|
|
isOpaque = true;
|
|
}
|
|
}
|
|
|
|
// Store the background color
|
|
PaintedDisplayItemLayerUserData* userData =
|
|
GetPaintedDisplayItemLayerUserData(data->mLayer);
|
|
NS_ASSERTION(userData, "where did our user data go?");
|
|
if (userData->mForcedBackgroundColor != backgroundColor) {
|
|
// Invalidate the entire target PaintedLayer since we're changing
|
|
// the background color
|
|
#ifdef MOZ_DUMP_PAINTING
|
|
if (nsLayoutUtils::InvalidationDebuggingIsEnabled()) {
|
|
printf_stderr("Forced background color has changed from #%08X to #%08X on layer %p\n",
|
|
userData->mForcedBackgroundColor, backgroundColor, data->mLayer);
|
|
nsAutoCString str;
|
|
AppendToString(str, data->mLayer->GetValidRegion());
|
|
printf_stderr("Invalidating layer %p: %s\n", data->mLayer, str.get());
|
|
}
|
|
#endif
|
|
data->mLayer->InvalidateRegion(data->mLayer->GetValidRegion());
|
|
}
|
|
userData->mForcedBackgroundColor = backgroundColor;
|
|
|
|
userData->mFontSmoothingBackgroundColor = data->mFontSmoothingBackgroundColor;
|
|
|
|
// use a mask layer for rounded rect clipping.
|
|
// data->mCommonClipCount may be -1 if we haven't put any actual
|
|
// drawable items in this layer (i.e. it's only catching events).
|
|
int32_t commonClipCount;
|
|
// If the layer contains a single item fixed to the viewport, we removed
|
|
// its clip in ProcessDisplayItems() and saved it to set on the layer instead.
|
|
// Set the clip on the layer now.
|
|
if (!data->mClipMovesWithLayer && data->mItemClip.HasClip()) {
|
|
nsIntRect layerClipRect = ScaleToNearestPixels(data->mItemClip.GetClipRect());
|
|
layerClipRect.MoveBy(mParameters.mOffset);
|
|
// The clip from such an item becomes part of the layer's scrolled clip,
|
|
// and the associated mask layer one of the layer's "ancestor mask layers".
|
|
LayerClip scrolledClip;
|
|
scrolledClip.SetClipRect(ViewAs<ParentLayerPixel>(layerClipRect));
|
|
scrolledClip.SetMaskLayerIndex(
|
|
SetupMaskLayerForScrolledClip(data->mLayer, data->mItemClip));
|
|
data->mLayer->SetScrolledClip(Some(scrolledClip));
|
|
// There is only one item, so all of the clips are in common to all items.
|
|
// data->mCommonClipCount will be zero because we removed the clip from
|
|
// the display item. (It could also be -1 if we're inside an inactive
|
|
// layer tree in which we don't call UpdateCommonClipCount() at all.)
|
|
MOZ_ASSERT(data->mCommonClipCount == -1 || data->mCommonClipCount == 0);
|
|
commonClipCount = data->mItemClip.GetRoundedRectCount();
|
|
} else {
|
|
commonClipCount = std::max(0, data->mCommonClipCount);
|
|
SetupMaskLayer(layer, data->mItemClip, data->mVisibleRegion, commonClipCount);
|
|
}
|
|
// copy commonClipCount to the entry
|
|
FrameLayerBuilder::PaintedLayerItemsEntry* entry = mLayerBuilder->
|
|
GetPaintedLayerItemsEntry(static_cast<PaintedLayer*>(layer.get()));
|
|
entry->mCommonClipCount = commonClipCount;
|
|
} else {
|
|
// mask layer for image and color layers
|
|
SetupMaskLayer(layer, data->mItemClip, data->mVisibleRegion);
|
|
}
|
|
|
|
uint32_t flags = 0;
|
|
nsIWidget* widget = mContainerReferenceFrame->PresContext()->GetRootWidget();
|
|
// See bug 941095. Not quite ready to disable this.
|
|
bool hidpi = false && widget && widget->GetDefaultScale().scale >= 2;
|
|
if (hidpi) {
|
|
flags |= Layer::CONTENT_DISABLE_SUBPIXEL_AA;
|
|
}
|
|
if (isOpaque && !data->mForceTransparentSurface) {
|
|
flags |= Layer::CONTENT_OPAQUE;
|
|
} else if (data->mNeedComponentAlpha && !hidpi) {
|
|
flags |= Layer::CONTENT_COMPONENT_ALPHA;
|
|
}
|
|
if (data->mDisableFlattening) {
|
|
flags |= Layer::CONTENT_DISABLE_FLATTENING;
|
|
}
|
|
layer->SetContentFlags(flags);
|
|
|
|
PaintedLayerData* containingPaintedLayerData =
|
|
mLayerBuilder->GetContainingPaintedLayerData();
|
|
if (containingPaintedLayerData) {
|
|
if (!data->mDispatchToContentHitRegion.GetBounds().IsEmpty()) {
|
|
nsRect rect = nsLayoutUtils::TransformFrameRectToAncestor(
|
|
mContainerReferenceFrame,
|
|
data->mDispatchToContentHitRegion.GetBounds(),
|
|
containingPaintedLayerData->mReferenceFrame);
|
|
containingPaintedLayerData->mDispatchToContentHitRegion.Or(
|
|
containingPaintedLayerData->mDispatchToContentHitRegion, rect);
|
|
}
|
|
if (!data->mMaybeHitRegion.GetBounds().IsEmpty()) {
|
|
nsRect rect = nsLayoutUtils::TransformFrameRectToAncestor(
|
|
mContainerReferenceFrame,
|
|
data->mMaybeHitRegion.GetBounds(),
|
|
containingPaintedLayerData->mReferenceFrame);
|
|
containingPaintedLayerData->mMaybeHitRegion.Or(
|
|
containingPaintedLayerData->mMaybeHitRegion, rect);
|
|
containingPaintedLayerData->mMaybeHitRegion.SimplifyOutward(8);
|
|
}
|
|
Maybe<Matrix4x4> matrixCache;
|
|
nsLayoutUtils::TransformToAncestorAndCombineRegions(
|
|
data->mHitRegion,
|
|
mContainerReferenceFrame,
|
|
containingPaintedLayerData->mReferenceFrame,
|
|
&containingPaintedLayerData->mHitRegion,
|
|
&containingPaintedLayerData->mMaybeHitRegion,
|
|
&matrixCache);
|
|
// See the comment in nsDisplayList::AddFrame, where the touch action regions
|
|
// are handled. The same thing applies here.
|
|
bool alreadyHadRegions =
|
|
!containingPaintedLayerData->mNoActionRegion.IsEmpty() ||
|
|
!containingPaintedLayerData->mHorizontalPanRegion.IsEmpty() ||
|
|
!containingPaintedLayerData->mVerticalPanRegion.IsEmpty();
|
|
nsLayoutUtils::TransformToAncestorAndCombineRegions(
|
|
data->mNoActionRegion,
|
|
mContainerReferenceFrame,
|
|
containingPaintedLayerData->mReferenceFrame,
|
|
&containingPaintedLayerData->mNoActionRegion,
|
|
&containingPaintedLayerData->mDispatchToContentHitRegion,
|
|
&matrixCache);
|
|
nsLayoutUtils::TransformToAncestorAndCombineRegions(
|
|
data->mHorizontalPanRegion,
|
|
mContainerReferenceFrame,
|
|
containingPaintedLayerData->mReferenceFrame,
|
|
&containingPaintedLayerData->mHorizontalPanRegion,
|
|
&containingPaintedLayerData->mDispatchToContentHitRegion,
|
|
&matrixCache);
|
|
nsLayoutUtils::TransformToAncestorAndCombineRegions(
|
|
data->mVerticalPanRegion,
|
|
mContainerReferenceFrame,
|
|
containingPaintedLayerData->mReferenceFrame,
|
|
&containingPaintedLayerData->mVerticalPanRegion,
|
|
&containingPaintedLayerData->mDispatchToContentHitRegion,
|
|
&matrixCache);
|
|
if (alreadyHadRegions) {
|
|
containingPaintedLayerData->mDispatchToContentHitRegion.OrWith(
|
|
containingPaintedLayerData->CombinedTouchActionRegion());
|
|
}
|
|
} else {
|
|
EventRegions regions;
|
|
regions.mHitRegion = ScaleRegionToOutsidePixels(data->mHitRegion);
|
|
regions.mNoActionRegion = ScaleRegionToOutsidePixels(data->mNoActionRegion);
|
|
regions.mHorizontalPanRegion = ScaleRegionToOutsidePixels(data->mHorizontalPanRegion);
|
|
regions.mVerticalPanRegion = ScaleRegionToOutsidePixels(data->mVerticalPanRegion);
|
|
// Points whose hit-region status we're not sure about need to be dispatched
|
|
// to the content thread. If a point is in both maybeHitRegion and hitRegion
|
|
// then it's not a "maybe" any more, and doesn't go into the dispatch-to-
|
|
// content region.
|
|
nsIntRegion maybeHitRegion = ScaleRegionToOutsidePixels(data->mMaybeHitRegion);
|
|
regions.mDispatchToContentHitRegion.Sub(maybeHitRegion, regions.mHitRegion);
|
|
regions.mDispatchToContentHitRegion.OrWith(
|
|
ScaleRegionToOutsidePixels(data->mDispatchToContentHitRegion));
|
|
regions.mHitRegion.OrWith(maybeHitRegion);
|
|
|
|
Matrix mat = layer->GetTransform().As2D();
|
|
mat.Invert();
|
|
regions.ApplyTranslationAndScale(mat._31, mat._32, mat._11, mat._22);
|
|
|
|
layer->SetEventRegions(regions);
|
|
}
|
|
|
|
SetBackfaceHiddenForLayer(data->mBackfaceHidden, data->mLayer);
|
|
if (layer != data->mLayer) {
|
|
SetBackfaceHiddenForLayer(data->mBackfaceHidden, layer);
|
|
}
|
|
}
|
|
|
|
static bool
|
|
IsItemAreaInWindowOpaqueRegion(nsDisplayListBuilder* aBuilder,
|
|
nsDisplayItem* aItem,
|
|
const nsRect& aComponentAlphaBounds)
|
|
{
|
|
if (!aItem->Frame()->PresContext()->IsChrome()) {
|
|
// Assume that Web content is always in the window opaque region.
|
|
return true;
|
|
}
|
|
if (aItem->ReferenceFrame() != aBuilder->RootReferenceFrame()) {
|
|
// aItem is probably in some transformed subtree.
|
|
// We're not going to bother figuring out where this landed, we're just
|
|
// going to assume it might have landed over a transparent part of
|
|
// the window.
|
|
return false;
|
|
}
|
|
return aBuilder->GetWindowOpaqueRegion().Contains(aComponentAlphaBounds);
|
|
}
|
|
|
|
void
|
|
PaintedLayerData::Accumulate(ContainerState* aState,
|
|
nsDisplayItem* aItem,
|
|
const nsIntRegion& aClippedOpaqueRegion,
|
|
const nsIntRect& aVisibleRect,
|
|
const DisplayItemClip& aClip,
|
|
LayerState aLayerState)
|
|
{
|
|
FLB_LOG_PAINTED_LAYER_DECISION(this, "Accumulating dp=%s(%p), f=%p against pld=%p\n", aItem->Name(), aItem, aItem->Frame(), this);
|
|
|
|
bool snap;
|
|
nsRect itemBounds = aItem->GetBounds(aState->mBuilder, &snap);
|
|
mBounds = mBounds.Union(aState->ScaleToOutsidePixels(itemBounds, snap));
|
|
|
|
if (aState->mBuilder->NeedToForceTransparentSurfaceForItem(aItem)) {
|
|
mForceTransparentSurface = true;
|
|
}
|
|
if (aState->mParameters.mDisableSubpixelAntialiasingInDescendants) {
|
|
// Disable component alpha.
|
|
// Note that the transform (if any) on the PaintedLayer is always an integer translation so
|
|
// we don't have to factor that in here.
|
|
aItem->DisableComponentAlpha();
|
|
}
|
|
|
|
bool clipMatches = mItemClip == aClip;
|
|
mItemClip = aClip;
|
|
|
|
mAssignedDisplayItems.AppendElement(AssignedDisplayItem(aItem, aClip, aLayerState));
|
|
|
|
if (!mIsSolidColorInVisibleRegion && mOpaqueRegion.Contains(aVisibleRect) &&
|
|
mVisibleRegion.Contains(aVisibleRect) && !mImage) {
|
|
// A very common case! Most pages have a PaintedLayer with the page
|
|
// background (opaque) visible and most or all of the page content over the
|
|
// top of that background.
|
|
// The rest of this method won't do anything. mVisibleRegion and mOpaqueRegion
|
|
// don't need updating. mVisibleRegion contains aVisibleRect already,
|
|
// mOpaqueRegion contains aVisibleRect and therefore whatever the opaque
|
|
// region of the item is. mVisibleRegion must contain mOpaqueRegion
|
|
// and therefore aVisibleRect.
|
|
return;
|
|
}
|
|
|
|
/* Mark as available for conversion to image layer if this is a nsDisplayImage and
|
|
* it's the only thing visible in this layer.
|
|
*/
|
|
if (nsIntRegion(aVisibleRect).Contains(mVisibleRegion) &&
|
|
aClippedOpaqueRegion.Contains(mVisibleRegion) &&
|
|
aItem->SupportsOptimizingToImage()) {
|
|
mImage = static_cast<nsDisplayImageContainer*>(aItem);
|
|
FLB_LOG_PAINTED_LAYER_DECISION(this, " Tracking image: nsDisplayImageContainer covers the layer\n");
|
|
} else if (mImage) {
|
|
FLB_LOG_PAINTED_LAYER_DECISION(this, " No longer tracking image\n");
|
|
mImage = nullptr;
|
|
}
|
|
|
|
bool isFirstVisibleItem = mVisibleRegion.IsEmpty();
|
|
if (isFirstVisibleItem) {
|
|
nscolor fontSmoothingBGColor;
|
|
if (aItem->ProvidesFontSmoothingBackgroundColor(&fontSmoothingBGColor)) {
|
|
mFontSmoothingBackgroundColor = fontSmoothingBGColor;
|
|
}
|
|
}
|
|
|
|
Maybe<nscolor> uniformColor = aItem->IsUniform(aState->mBuilder);
|
|
|
|
// Some display items have to exist (so they can set forceTransparentSurface
|
|
// below) but don't draw anything. They'll return true for isUniform but
|
|
// a color with opacity 0.
|
|
if (!uniformColor || NS_GET_A(*uniformColor) > 0) {
|
|
// Make sure that the visible area is covered by uniform pixels. In
|
|
// particular this excludes cases where the edges of the item are not
|
|
// pixel-aligned (thus the item will not be truly uniform).
|
|
if (uniformColor) {
|
|
bool snap;
|
|
nsRect bounds = aItem->GetBounds(aState->mBuilder, &snap);
|
|
if (!aState->ScaleToInsidePixels(bounds, snap).Contains(aVisibleRect)) {
|
|
uniformColor = Nothing();
|
|
FLB_LOG_PAINTED_LAYER_DECISION(this, " Display item does not cover the visible rect\n");
|
|
}
|
|
}
|
|
if (uniformColor) {
|
|
if (isFirstVisibleItem) {
|
|
// This color is all we have
|
|
mSolidColor = *uniformColor;
|
|
mIsSolidColorInVisibleRegion = true;
|
|
} else if (mIsSolidColorInVisibleRegion &&
|
|
mVisibleRegion.IsEqual(nsIntRegion(aVisibleRect)) &&
|
|
clipMatches) {
|
|
// we can just blend the colors together
|
|
mSolidColor = NS_ComposeColors(mSolidColor, *uniformColor);
|
|
} else {
|
|
FLB_LOG_PAINTED_LAYER_DECISION(this, " Layer not a solid color: Can't blend colors togethers\n");
|
|
mIsSolidColorInVisibleRegion = false;
|
|
}
|
|
} else {
|
|
FLB_LOG_PAINTED_LAYER_DECISION(this, " Layer is not a solid color: Display item is not uniform over the visible bound\n");
|
|
mIsSolidColorInVisibleRegion = false;
|
|
}
|
|
|
|
mVisibleRegion.Or(mVisibleRegion, aVisibleRect);
|
|
mVisibleRegion.SimplifyOutward(4);
|
|
}
|
|
|
|
if (!aClippedOpaqueRegion.IsEmpty()) {
|
|
for (auto iter = aClippedOpaqueRegion.RectIter(); !iter.Done(); iter.Next()) {
|
|
// We don't use SimplifyInward here since it's not defined exactly
|
|
// what it will discard. For our purposes the most important case
|
|
// is a large opaque background at the bottom of z-order (e.g.,
|
|
// a canvas background), so we need to make sure that the first rect
|
|
// we see doesn't get discarded.
|
|
nsIntRegion tmp;
|
|
tmp.Or(mOpaqueRegion, iter.Get());
|
|
// Opaque display items in chrome documents whose window is partially
|
|
// transparent are always added to the opaque region. This helps ensure
|
|
// that we get as much subpixel-AA as possible in the chrome.
|
|
if (tmp.GetNumRects() <= 4 || aItem->Frame()->PresContext()->IsChrome()) {
|
|
mOpaqueRegion = Move(tmp);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!aState->mParameters.mDisableSubpixelAntialiasingInDescendants) {
|
|
nsRect componentAlpha = aItem->GetComponentAlphaBounds(aState->mBuilder);
|
|
if (!componentAlpha.IsEmpty()) {
|
|
nsIntRect componentAlphaRect =
|
|
aState->ScaleToOutsidePixels(componentAlpha, false).Intersect(aVisibleRect);
|
|
if (!mOpaqueRegion.Contains(componentAlphaRect)) {
|
|
if (IsItemAreaInWindowOpaqueRegion(aState->mBuilder, aItem,
|
|
componentAlpha.Intersect(aItem->GetVisibleRect()))) {
|
|
mNeedComponentAlpha = true;
|
|
} else {
|
|
aItem->DisableComponentAlpha();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Ensure animated text does not get flattened, even if it forces other
|
|
// content in the container to be layerized. The content backend might
|
|
// not support subpixel positioning of text that animated transforms can
|
|
// generate. bug 633097
|
|
if (aState->mParameters.mInActiveTransformedSubtree &&
|
|
(mNeedComponentAlpha ||
|
|
!aItem->GetComponentAlphaBounds(aState->mBuilder).IsEmpty())) {
|
|
mDisableFlattening = true;
|
|
}
|
|
}
|
|
|
|
nsRegion
|
|
PaintedLayerData::CombinedTouchActionRegion()
|
|
{
|
|
nsRegion result;
|
|
result.Or(mHorizontalPanRegion, mVerticalPanRegion);
|
|
result.OrWith(mNoActionRegion);
|
|
return result;
|
|
}
|
|
|
|
void
|
|
PaintedLayerData::AccumulateEventRegions(ContainerState* aState, nsDisplayLayerEventRegions* aEventRegions)
|
|
{
|
|
FLB_LOG_PAINTED_LAYER_DECISION(this, "Accumulating event regions %p against pld=%p\n", aEventRegions, this);
|
|
|
|
mHitRegion.OrWith(aEventRegions->HitRegion());
|
|
mMaybeHitRegion.OrWith(aEventRegions->MaybeHitRegion());
|
|
mDispatchToContentHitRegion.OrWith(aEventRegions->DispatchToContentHitRegion());
|
|
|
|
// See the comment in nsDisplayList::AddFrame, where the touch action regions
|
|
// are handled. The same thing applies here.
|
|
bool alreadyHadRegions = !mNoActionRegion.IsEmpty() ||
|
|
!mHorizontalPanRegion.IsEmpty() ||
|
|
!mVerticalPanRegion.IsEmpty();
|
|
mNoActionRegion.OrWith(aEventRegions->NoActionRegion());
|
|
mHorizontalPanRegion.OrWith(aEventRegions->HorizontalPanRegion());
|
|
mVerticalPanRegion.OrWith(aEventRegions->VerticalPanRegion());
|
|
if (alreadyHadRegions) {
|
|
mDispatchToContentHitRegion.OrWith(CombinedTouchActionRegion());
|
|
}
|
|
|
|
// Calculate scaled versions of the bounds of mHitRegion and mMaybeHitRegion
|
|
// for quick access in FindPaintedLayerFor().
|
|
mScaledHitRegionBounds = aState->ScaleToOutsidePixels(mHitRegion.GetBounds());
|
|
mScaledMaybeHitRegionBounds = aState->ScaleToOutsidePixels(mMaybeHitRegion.GetBounds());
|
|
}
|
|
|
|
PaintedLayerData
|
|
ContainerState::NewPaintedLayerData(nsDisplayItem* aItem,
|
|
AnimatedGeometryRoot* aAnimatedGeometryRoot,
|
|
const DisplayItemScrollClip* aScrollClip,
|
|
const nsPoint& aTopLeft,
|
|
bool aClipMovesWithLayer)
|
|
{
|
|
PaintedLayerData data;
|
|
data.mAnimatedGeometryRoot = aAnimatedGeometryRoot;
|
|
data.mScrollClip = aScrollClip;
|
|
data.mAnimatedGeometryRootOffset = aTopLeft;
|
|
data.mReferenceFrame = aItem->ReferenceFrame();
|
|
data.mClipMovesWithLayer = aClipMovesWithLayer;
|
|
data.mBackfaceHidden = aItem->Frame()->In3DContextAndBackfaceIsHidden();
|
|
data.mIsCaret = aItem->GetType() == nsDisplayItem::TYPE_CARET;
|
|
|
|
data.mNewChildLayersIndex = mNewChildLayers.Length();
|
|
NewLayerEntry* newLayerEntry = mNewChildLayers.AppendElement();
|
|
newLayerEntry->mAnimatedGeometryRoot = aAnimatedGeometryRoot;
|
|
newLayerEntry->mScrollClip = aScrollClip;
|
|
newLayerEntry->mIsCaret = data.mIsCaret;
|
|
// newLayerEntry->mOpaqueRegion is filled in later from
|
|
// paintedLayerData->mOpaqueRegion, if necessary.
|
|
|
|
// Allocate another entry for this layer's optimization to ColorLayer/ImageLayer
|
|
mNewChildLayers.AppendElement();
|
|
|
|
return data;
|
|
}
|
|
|
|
#ifdef MOZ_DUMP_PAINTING
|
|
static void
|
|
DumpPaintedImage(nsDisplayItem* aItem, SourceSurface* aSurface)
|
|
{
|
|
nsCString string(aItem->Name());
|
|
string.Append('-');
|
|
string.AppendInt((uint64_t)aItem);
|
|
fprintf_stderr(gfxUtils::sDumpPaintFile, "<script>array[\"%s\"]=\"", string.BeginReading());
|
|
gfxUtils::DumpAsDataURI(aSurface, gfxUtils::sDumpPaintFile);
|
|
fprintf_stderr(gfxUtils::sDumpPaintFile, "\";</script>\n");
|
|
}
|
|
#endif
|
|
|
|
static void
|
|
PaintInactiveLayer(nsDisplayListBuilder* aBuilder,
|
|
LayerManager* aManager,
|
|
nsDisplayItem* aItem,
|
|
gfxContext* aContext,
|
|
nsRenderingContext* aCtx)
|
|
{
|
|
// This item has an inactive layer. Render it to a PaintedLayer
|
|
// using a temporary BasicLayerManager.
|
|
BasicLayerManager* basic = static_cast<BasicLayerManager*>(aManager);
|
|
RefPtr<gfxContext> context = aContext;
|
|
#ifdef MOZ_DUMP_PAINTING
|
|
int32_t appUnitsPerDevPixel = AppUnitsPerDevPixel(aItem);
|
|
nsIntRect itemVisibleRect =
|
|
aItem->GetVisibleRect().ToOutsidePixels(appUnitsPerDevPixel);
|
|
|
|
RefPtr<DrawTarget> tempDT;
|
|
if (gfxEnv::DumpPaint()) {
|
|
tempDT = gfxPlatform::GetPlatform()->CreateOffscreenContentDrawTarget(
|
|
itemVisibleRect.Size(),
|
|
SurfaceFormat::B8G8R8A8);
|
|
if (tempDT) {
|
|
context = gfxContext::CreateOrNull(tempDT);
|
|
if (!context) {
|
|
// Leave this as crash, it's in the debugging code, we want to know
|
|
gfxDevCrash(LogReason::InvalidContext) << "PaintInactive context problem " << gfx::hexa(tempDT);
|
|
return;
|
|
}
|
|
context->SetMatrix(gfxMatrix::Translation(-itemVisibleRect.x,
|
|
-itemVisibleRect.y));
|
|
}
|
|
}
|
|
#endif
|
|
basic->BeginTransaction();
|
|
basic->SetTarget(context);
|
|
|
|
if (aItem->GetType() == nsDisplayItem::TYPE_SVG_EFFECTS) {
|
|
static_cast<nsDisplaySVGEffects*>(aItem)->PaintAsLayer(aBuilder, aCtx, basic);
|
|
if (basic->InTransaction()) {
|
|
basic->AbortTransaction();
|
|
}
|
|
} else {
|
|
basic->EndTransaction(FrameLayerBuilder::DrawPaintedLayer, aBuilder);
|
|
}
|
|
FrameLayerBuilder *builder = static_cast<FrameLayerBuilder*>(basic->GetUserData(&gLayerManagerLayerBuilder));
|
|
if (builder) {
|
|
builder->DidEndTransaction();
|
|
}
|
|
|
|
basic->SetTarget(nullptr);
|
|
|
|
#ifdef MOZ_DUMP_PAINTING
|
|
if (gfxEnv::DumpPaint() && tempDT) {
|
|
RefPtr<SourceSurface> surface = tempDT->Snapshot();
|
|
DumpPaintedImage(aItem, surface);
|
|
|
|
DrawTarget* drawTarget = aContext->GetDrawTarget();
|
|
Rect rect(itemVisibleRect.x, itemVisibleRect.y,
|
|
itemVisibleRect.width, itemVisibleRect.height);
|
|
drawTarget->DrawSurface(surface, rect, Rect(Point(0,0), rect.Size()));
|
|
|
|
aItem->SetPainted();
|
|
}
|
|
#endif
|
|
}
|
|
|
|
/**
|
|
* Chooses a single active scrolled root for the entire display list, used
|
|
* when we are flattening layers.
|
|
*/
|
|
bool
|
|
ContainerState::ChooseAnimatedGeometryRoot(const nsDisplayList& aList,
|
|
AnimatedGeometryRoot **aAnimatedGeometryRoot)
|
|
{
|
|
for (nsDisplayItem* item = aList.GetBottom(); item; item = item->GetAbove()) {
|
|
LayerState layerState = item->GetLayerState(mBuilder, mManager, mParameters);
|
|
// Don't use an item that won't be part of any PaintedLayers to pick the
|
|
// active scrolled root.
|
|
if (layerState == LAYER_ACTIVE_FORCE) {
|
|
continue;
|
|
}
|
|
|
|
// Try using the actual active scrolled root of the backmost item, as that
|
|
// should result in the least invalidation when scrolling.
|
|
*aAnimatedGeometryRoot = item->GetAnimatedGeometryRoot();
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
nsIntRegion
|
|
ContainerState::ComputeOpaqueRect(nsDisplayItem* aItem,
|
|
AnimatedGeometryRoot* aAnimatedGeometryRoot,
|
|
const DisplayItemClip& aClip,
|
|
nsDisplayList* aList,
|
|
bool* aHideAllLayersBelow,
|
|
bool* aOpaqueForAnimatedGeometryRootParent)
|
|
{
|
|
bool snapOpaque;
|
|
nsRegion opaque = aItem->GetOpaqueRegion(mBuilder, &snapOpaque);
|
|
if (opaque.IsEmpty()) {
|
|
return nsIntRegion();
|
|
}
|
|
|
|
nsIntRegion opaquePixels;
|
|
nsRegion opaqueClipped;
|
|
for (auto iter = opaque.RectIter(); !iter.Done(); iter.Next()) {
|
|
opaqueClipped.Or(opaqueClipped,
|
|
aClip.ApproximateIntersectInward(iter.Get()));
|
|
}
|
|
if (aAnimatedGeometryRoot == mContainerAnimatedGeometryRoot &&
|
|
opaqueClipped.Contains(mContainerBounds)) {
|
|
*aHideAllLayersBelow = true;
|
|
aList->SetIsOpaque();
|
|
}
|
|
// Add opaque areas to the "exclude glass" region. Only do this when our
|
|
// container layer is going to be the rootmost layer, otherwise transforms
|
|
// etc will mess us up (and opaque contributions from other containers are
|
|
// not needed).
|
|
if (!nsLayoutUtils::GetCrossDocParentFrame(mContainerFrame)) {
|
|
mBuilder->AddWindowOpaqueRegion(opaqueClipped);
|
|
}
|
|
opaquePixels = ScaleRegionToInsidePixels(opaqueClipped, snapOpaque);
|
|
|
|
if (IsInInactiveLayer()) {
|
|
return opaquePixels;
|
|
}
|
|
|
|
nsIScrollableFrame* sf = nsLayoutUtils::GetScrollableFrameFor(*aAnimatedGeometryRoot);
|
|
if (sf) {
|
|
nsRect displayport;
|
|
bool usingDisplayport =
|
|
nsLayoutUtils::GetDisplayPort((*aAnimatedGeometryRoot)->GetContent(), &displayport,
|
|
RelativeTo::ScrollFrame);
|
|
if (!usingDisplayport) {
|
|
// No async scrolling, so all that matters is that the layer contents
|
|
// cover the scrollport.
|
|
displayport = sf->GetScrollPortRect();
|
|
}
|
|
nsIFrame* scrollFrame = do_QueryFrame(sf);
|
|
displayport += scrollFrame->GetOffsetToCrossDoc(mContainerReferenceFrame);
|
|
if (opaque.Contains(displayport)) {
|
|
*aOpaqueForAnimatedGeometryRootParent = true;
|
|
}
|
|
}
|
|
return opaquePixels;
|
|
}
|
|
|
|
static const DisplayItemScrollClip*
|
|
InnermostScrollClipApplicableToAGR(const DisplayItemScrollClip* aItemScrollClip,
|
|
AnimatedGeometryRoot* aAnimatedGeometryRoot)
|
|
{
|
|
// "Applicable" scroll clips are those that are for nsIScrollableFrames
|
|
// that are ancestors of aAnimatedGeometryRoot or ancestors of aContainerScrollClip.
|
|
// They can be applied to all items sharing this animated geometry root, so
|
|
// instead of applying to the items individually, they can be applied to the
|
|
// whole layer.
|
|
for (const DisplayItemScrollClip* scrollClip = aItemScrollClip;
|
|
scrollClip;
|
|
scrollClip = scrollClip->mParent) {
|
|
nsIFrame* scrolledFrame = scrollClip->mScrollableFrame->GetScrolledFrame();
|
|
if (nsLayoutUtils::IsAncestorFrameCrossDoc(scrolledFrame, *aAnimatedGeometryRoot)) {
|
|
// scrollClip and all its ancestors are applicable.
|
|
return scrollClip;
|
|
}
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
Maybe<size_t>
|
|
ContainerState::SetupMaskLayerForScrolledClip(Layer* aLayer,
|
|
const DisplayItemClip& aClip)
|
|
{
|
|
if (aClip.GetRoundedRectCount() > 0) {
|
|
Maybe<size_t> maskLayerIndex = Some(aLayer->GetAncestorMaskLayerCount());
|
|
if (RefPtr<Layer> maskLayer = CreateMaskLayer(aLayer, aClip, maskLayerIndex,
|
|
aClip.GetRoundedRectCount())) {
|
|
aLayer->AddAncestorMaskLayer(maskLayer);
|
|
return maskLayerIndex;
|
|
}
|
|
// Fall through to |return Nothing()|.
|
|
}
|
|
return Nothing();
|
|
}
|
|
|
|
/*
|
|
* Iterate through the non-clip items in aList and its descendants.
|
|
* For each item we compute the effective clip rect. Each item is assigned
|
|
* to a layer. We invalidate the areas in PaintedLayers where an item
|
|
* has moved from one PaintedLayer to another. Also,
|
|
* aState->mInvalidPaintedContent is invalidated in every PaintedLayer.
|
|
* We set the clip rect for items that generated their own layer, and
|
|
* create a mask layer to do any rounded rect clipping.
|
|
* (PaintedLayers don't need a clip rect on the layer, we clip the items
|
|
* individually when we draw them.)
|
|
* We set the visible rect for all layers, although the actual setting
|
|
* of visible rects for some PaintedLayers is deferred until the calling
|
|
* of ContainerState::Finish.
|
|
*/
|
|
void
|
|
ContainerState::ProcessDisplayItems(nsDisplayList* aList)
|
|
{
|
|
PROFILER_LABEL("ContainerState", "ProcessDisplayItems",
|
|
js::ProfileEntry::Category::GRAPHICS);
|
|
|
|
AnimatedGeometryRoot* lastAnimatedGeometryRoot = mContainerAnimatedGeometryRoot;
|
|
nsPoint topLeft(0,0);
|
|
|
|
// When NO_COMPONENT_ALPHA is set, items will be flattened into a single
|
|
// layer, so we need to choose which active scrolled root to use for all
|
|
// items.
|
|
if (mFlattenToSingleLayer) {
|
|
if (ChooseAnimatedGeometryRoot(*aList, &lastAnimatedGeometryRoot)) {
|
|
topLeft = (*lastAnimatedGeometryRoot)->GetOffsetToCrossDoc(mContainerReferenceFrame);
|
|
}
|
|
}
|
|
|
|
int32_t maxLayers = gfxPrefs::MaxActiveLayers();
|
|
int layerCount = 0;
|
|
|
|
nsDisplayList savedItems;
|
|
nsDisplayItem* item;
|
|
while ((item = aList->RemoveBottom()) != nullptr) {
|
|
nsDisplayItem::Type itemType = item->GetType();
|
|
|
|
// If the item is a event regions item, but is empty (has no regions in it)
|
|
// then we should just throw it out
|
|
if (itemType == nsDisplayItem::TYPE_LAYER_EVENT_REGIONS) {
|
|
nsDisplayLayerEventRegions* eventRegions =
|
|
static_cast<nsDisplayLayerEventRegions*>(item);
|
|
if (eventRegions->IsEmpty()) {
|
|
item->~nsDisplayItem();
|
|
continue;
|
|
}
|
|
}
|
|
|
|
// Peek ahead to the next item and try merging with it or swapping with it
|
|
// if necessary.
|
|
nsDisplayItem* aboveItem;
|
|
while ((aboveItem = aList->GetBottom()) != nullptr) {
|
|
if (aboveItem->TryMerge(item)) {
|
|
aList->RemoveBottom();
|
|
item->~nsDisplayItem();
|
|
item = aboveItem;
|
|
itemType = item->GetType();
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
|
|
nsDisplayList* itemSameCoordinateSystemChildren
|
|
= item->GetSameCoordinateSystemChildren();
|
|
if (item->ShouldFlattenAway(mBuilder)) {
|
|
aList->AppendToBottom(itemSameCoordinateSystemChildren);
|
|
item->~nsDisplayItem();
|
|
continue;
|
|
}
|
|
|
|
savedItems.AppendToTop(item);
|
|
|
|
NS_ASSERTION(mAppUnitsPerDevPixel == AppUnitsPerDevPixel(item),
|
|
"items in a container layer should all have the same app units per dev pixel");
|
|
|
|
if (mBuilder->NeedToForceTransparentSurfaceForItem(item)) {
|
|
aList->SetNeedsTransparentSurface();
|
|
}
|
|
|
|
if (mParameters.mForEventsOnly && !item->GetChildren() &&
|
|
itemType != nsDisplayItem::TYPE_LAYER_EVENT_REGIONS) {
|
|
continue;
|
|
}
|
|
|
|
LayerState layerState = item->GetLayerState(mBuilder, mManager, mParameters);
|
|
if (layerState == LAYER_INACTIVE &&
|
|
nsDisplayItem::ForceActiveLayers()) {
|
|
layerState = LAYER_ACTIVE;
|
|
}
|
|
|
|
bool forceInactive;
|
|
AnimatedGeometryRoot* animatedGeometryRoot;
|
|
AnimatedGeometryRoot* animatedGeometryRootForClip = nullptr;
|
|
if (mFlattenToSingleLayer) {
|
|
forceInactive = true;
|
|
animatedGeometryRoot = lastAnimatedGeometryRoot;
|
|
} else {
|
|
forceInactive = false;
|
|
if (mManager->IsWidgetLayerManager()) {
|
|
animatedGeometryRoot = item->GetAnimatedGeometryRoot();
|
|
animatedGeometryRootForClip = item->AnimatedGeometryRootForScrollMetadata();
|
|
} else {
|
|
// For inactive layer subtrees, splitting content into PaintedLayers
|
|
// based on animated geometry roots is pointless. It's more efficient
|
|
// to build the minimum number of layers.
|
|
animatedGeometryRoot = mContainerAnimatedGeometryRoot;
|
|
|
|
}
|
|
topLeft = (*animatedGeometryRoot)->GetOffsetToCrossDoc(mContainerReferenceFrame);
|
|
}
|
|
if (!animatedGeometryRootForClip) {
|
|
animatedGeometryRootForClip = animatedGeometryRoot;
|
|
}
|
|
|
|
const DisplayItemScrollClip* itemScrollClip = item->ScrollClip();
|
|
// Now we need to separate the item's scroll clip chain into those scroll
|
|
// clips that can be applied to the whole layer (i.e. to all items
|
|
// sharing the item's animated geometry root), and those that need to be
|
|
// applied to the item itself.
|
|
const DisplayItemScrollClip* agrScrollClip =
|
|
InnermostScrollClipApplicableToAGR(itemScrollClip, animatedGeometryRootForClip);
|
|
MOZ_ASSERT(DisplayItemScrollClip::IsAncestor(agrScrollClip, itemScrollClip));
|
|
|
|
if (agrScrollClip != itemScrollClip) {
|
|
// Pick up any scroll clips that should apply to the item and apply them.
|
|
DisplayItemClip clip = item->GetClip();
|
|
for (const DisplayItemScrollClip* scrollClip = itemScrollClip;
|
|
scrollClip && scrollClip != agrScrollClip && scrollClip != mContainerScrollClip;
|
|
scrollClip = scrollClip->mParent) {
|
|
if (scrollClip->mClip) {
|
|
clip.IntersectWith(*scrollClip->mClip);
|
|
}
|
|
}
|
|
item->SetClip(mBuilder, clip);
|
|
}
|
|
|
|
bool clipMovesWithLayer = (animatedGeometryRoot == animatedGeometryRootForClip);
|
|
|
|
// For items whose clip scrolls relative to the layer rather than moving
|
|
// with the layer, remove their clip at the display item level because
|
|
// additional areas could be brought into view by async scrolling.
|
|
// Save the clip so we can set it on the layer instead later.
|
|
DisplayItemClip scrollingClip = DisplayItemClip::NoClip();
|
|
if (!clipMovesWithLayer) {
|
|
scrollingClip = item->GetClip();
|
|
item->SetClip(mBuilder, DisplayItemClip::NoClip());
|
|
}
|
|
|
|
bool snap;
|
|
nsRect itemContent = item->GetBounds(mBuilder, &snap);
|
|
if (itemType == nsDisplayItem::TYPE_LAYER_EVENT_REGIONS) {
|
|
nsDisplayLayerEventRegions* eventRegions =
|
|
static_cast<nsDisplayLayerEventRegions*>(item);
|
|
itemContent = eventRegions->GetHitRegionBounds(mBuilder, &snap);
|
|
}
|
|
nsIntRect itemDrawRect = ScaleToOutsidePixels(itemContent, snap);
|
|
bool prerenderedTransform = itemType == nsDisplayItem::TYPE_TRANSFORM &&
|
|
static_cast<nsDisplayTransform*>(item)->MayBeAnimated(mBuilder);
|
|
ParentLayerIntRect clipRect;
|
|
const DisplayItemClip& itemClip = item->GetClip();
|
|
if (itemClip.HasClip()) {
|
|
itemContent.IntersectRect(itemContent, itemClip.GetClipRect());
|
|
clipRect = ViewAs<ParentLayerPixel>(ScaleToNearestPixels(itemClip.GetClipRect()));
|
|
if (!prerenderedTransform) {
|
|
itemDrawRect.IntersectRect(itemDrawRect, clipRect.ToUnknownRect());
|
|
}
|
|
clipRect.MoveBy(ViewAs<ParentLayerPixel>(mParameters.mOffset));
|
|
}
|
|
#ifdef DEBUG
|
|
nsRect bounds = itemContent;
|
|
bool dummy;
|
|
if (itemType == nsDisplayItem::TYPE_LAYER_EVENT_REGIONS) {
|
|
bounds = item->GetBounds(mBuilder, &dummy);
|
|
if (itemClip.HasClip()) {
|
|
bounds.IntersectRect(bounds, itemClip.GetClipRect());
|
|
}
|
|
}
|
|
bounds = scrollingClip.ApplyNonRoundedIntersection(bounds);
|
|
if (!bounds.IsEmpty()) {
|
|
for (const DisplayItemScrollClip* scrollClip = itemScrollClip;
|
|
scrollClip && scrollClip != mContainerScrollClip;
|
|
scrollClip = scrollClip->mParent) {
|
|
if (scrollClip->mClip) {
|
|
if (scrollClip->mIsAsyncScrollable) {
|
|
bounds = scrollClip->mClip->GetClipRect();
|
|
} else {
|
|
bounds = scrollClip->mClip->ApplyNonRoundedIntersection(bounds);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
((nsRect&)mAccumulatedChildBounds).UnionRect(mAccumulatedChildBounds, bounds);
|
|
#endif
|
|
|
|
nsIntRect itemVisibleRect = itemDrawRect;
|
|
// We haven't computed visibility at this point, so item->GetVisibleRect()
|
|
// is just the dirty rect that item was initialized with. We intersect it
|
|
// with the clipped item bounds to get a tighter visible rect.
|
|
itemVisibleRect = itemVisibleRect.Intersect(
|
|
ScaleToOutsidePixels(item->GetVisibleRect(), false));
|
|
|
|
if (maxLayers != -1 && layerCount >= maxLayers) {
|
|
forceInactive = true;
|
|
}
|
|
|
|
// Assign the item to a layer
|
|
if (layerState == LAYER_ACTIVE_FORCE ||
|
|
(layerState == LAYER_INACTIVE && !mManager->IsWidgetLayerManager()) ||
|
|
(!forceInactive &&
|
|
(layerState == LAYER_ACTIVE_EMPTY ||
|
|
layerState == LAYER_ACTIVE))) {
|
|
|
|
layerCount++;
|
|
|
|
// LAYER_ACTIVE_EMPTY means the layer is created just for its metadata.
|
|
// We should never see an empty layer with any visible content!
|
|
NS_ASSERTION(layerState != LAYER_ACTIVE_EMPTY ||
|
|
itemVisibleRect.IsEmpty(),
|
|
"State is LAYER_ACTIVE_EMPTY but visible rect is not.");
|
|
|
|
// As long as the new layer isn't going to be a PaintedLayer,
|
|
// InvalidateForLayerChange doesn't need the new layer pointer.
|
|
// We also need to check the old data now, because BuildLayer
|
|
// can overwrite it.
|
|
InvalidateForLayerChange(item, nullptr);
|
|
|
|
// If the item would have its own layer but is invisible, just hide it.
|
|
// Note that items without their own layers can't be skipped this
|
|
// way, since their PaintedLayer may decide it wants to draw them
|
|
// into its buffer even if they're currently covered.
|
|
if (itemVisibleRect.IsEmpty() &&
|
|
!item->ShouldBuildLayerEvenIfInvisible(mBuilder)) {
|
|
continue;
|
|
}
|
|
|
|
if (mScrollClipForPerspectiveChild) {
|
|
// We are the single transform child item of an nsDisplayPerspective.
|
|
// Our parent forwarded a scroll clip to us. Pick it up.
|
|
// We do this after any clipping has been applied, because this
|
|
// forwarded scroll clip is only used for scrolling (in the form of
|
|
// APZ frame metrics), not for clipping - the clip still belongs on
|
|
// the perspective item.
|
|
MOZ_ASSERT(itemType == nsDisplayItem::TYPE_TRANSFORM);
|
|
MOZ_ASSERT(!itemScrollClip);
|
|
MOZ_ASSERT(!agrScrollClip);
|
|
MOZ_ASSERT(DisplayItemScrollClip::IsAncestor(mContainerScrollClip,
|
|
mScrollClipForPerspectiveChild));
|
|
itemScrollClip = mScrollClipForPerspectiveChild;
|
|
agrScrollClip = mScrollClipForPerspectiveChild;
|
|
}
|
|
|
|
// 3D-transformed layers don't necessarily draw in the order in which
|
|
// they're added to their parent container layer.
|
|
bool mayDrawOutOfOrder = itemType == nsDisplayItem::TYPE_TRANSFORM &&
|
|
(item->Frame()->Combines3DTransformWithAncestors() ||
|
|
item->Frame()->Extend3DContext());
|
|
|
|
// Let mPaintedLayerDataTree know about this item, so that
|
|
// FindPaintedLayerFor and FindOpaqueBackgroundColor are aware of this
|
|
// item, even though it's not in any PaintedLayerDataStack.
|
|
// Ideally we'd only need the "else" case here and have
|
|
// mPaintedLayerDataTree figure out the right clip from the animated
|
|
// geometry root that we give it, but it can't easily figure about
|
|
// overflow:hidden clips on ancestors just by looking at the frame.
|
|
// So we'll do a little hand holding and pass the clip instead of the
|
|
// visible rect for the two important cases.
|
|
nscolor uniformColor = NS_RGBA(0,0,0,0);
|
|
nscolor* uniformColorPtr = (mayDrawOutOfOrder || IsInInactiveLayer()) ? nullptr :
|
|
&uniformColor;
|
|
nsIntRect clipRectUntyped;
|
|
const DisplayItemClip& layerClip = clipMovesWithLayer ? itemClip : scrollingClip;
|
|
ParentLayerIntRect layerClipRect;
|
|
nsIntRect* clipPtr = nullptr;
|
|
if (layerClip.HasClip()) {
|
|
layerClipRect = ViewAs<ParentLayerPixel>(
|
|
ScaleToNearestPixels(layerClip.GetClipRect()) + mParameters.mOffset);
|
|
clipRectUntyped = layerClipRect.ToUnknownRect();
|
|
clipPtr = &clipRectUntyped;
|
|
}
|
|
if (*animatedGeometryRoot == item->Frame() &&
|
|
*animatedGeometryRoot != mBuilder->RootReferenceFrame()) {
|
|
// This is the case for scrollbar thumbs, for example. In that case the
|
|
// clip we care about is the overflow:hidden clip on the scrollbar.
|
|
mPaintedLayerDataTree.AddingOwnLayer(animatedGeometryRoot->mParentAGR,
|
|
clipPtr,
|
|
uniformColorPtr);
|
|
} else if (prerenderedTransform) {
|
|
mPaintedLayerDataTree.AddingOwnLayer(animatedGeometryRoot,
|
|
clipPtr,
|
|
uniformColorPtr);
|
|
} else if (!clipMovesWithLayer) {
|
|
mPaintedLayerDataTree.AddingOwnLayer(animatedGeometryRootForClip,
|
|
clipPtr,
|
|
uniformColorPtr);
|
|
} else {
|
|
// Using itemVisibleRect here isn't perfect. itemVisibleRect can be
|
|
// larger or smaller than the potential bounds of item's contents in
|
|
// animatedGeometryRoot: It's too large if there's a clipped display
|
|
// port somewhere among item's contents (see bug 1147673), and it can
|
|
// be too small if the contents can move, because it only looks at the
|
|
// contents' current bounds and doesn't anticipate any animations.
|
|
// Time will tell whether this is good enough, or whether we need to do
|
|
// something more sophisticated here.
|
|
mPaintedLayerDataTree.AddingOwnLayer(animatedGeometryRoot,
|
|
&itemVisibleRect, uniformColorPtr);
|
|
}
|
|
|
|
ContainerLayerParameters params = mParameters;
|
|
params.mBackgroundColor = uniformColor;
|
|
params.mLayerCreationHint = GetLayerCreationHint(animatedGeometryRoot);
|
|
params.mScrollClip = agrScrollClip;
|
|
params.mScrollClipForPerspectiveChild = nullptr;
|
|
|
|
if (itemType == nsDisplayItem::TYPE_PERSPECTIVE) {
|
|
// Perspective items have a single child item, an nsDisplayTransform.
|
|
// If the perspective item is scrolled, but the perspective-inducing
|
|
// frame is outside the scroll frame (indicated by this items AGR
|
|
// being outside that scroll frame), we have to take special care to
|
|
// make APZ scrolling work properly. APZ needs us to put the scroll
|
|
// frame's FrameMetrics on our child transform ContainerLayer instead.
|
|
// Our agrScrollClip is the scroll clip that's applicable to our
|
|
// perspective frame, so it won't be the scroll clip for the scrolled
|
|
// frame in the case that we care about, and we'll forward that scroll
|
|
// clip to our child.
|
|
params.mScrollClipForPerspectiveChild = itemScrollClip;
|
|
}
|
|
|
|
// Just use its layer.
|
|
// Set layerContentsVisibleRect.width/height to -1 to indicate we
|
|
// currently don't know. If BuildContainerLayerFor gets called by
|
|
// item->BuildLayer, this will be set to a proper rect.
|
|
nsIntRect layerContentsVisibleRect(0, 0, -1, -1);
|
|
params.mLayerContentsVisibleRect = &layerContentsVisibleRect;
|
|
RefPtr<Layer> ownLayer = item->BuildLayer(mBuilder, mManager, params);
|
|
if (!ownLayer) {
|
|
continue;
|
|
}
|
|
|
|
NS_ASSERTION(!ownLayer->AsPaintedLayer(),
|
|
"Should never have created a dedicated Painted layer!");
|
|
|
|
if (item->BackfaceIsHidden()) {
|
|
ownLayer->SetContentFlags(ownLayer->GetContentFlags() |
|
|
Layer::CONTENT_BACKFACE_HIDDEN);
|
|
} else {
|
|
ownLayer->SetContentFlags(ownLayer->GetContentFlags() &
|
|
~Layer::CONTENT_BACKFACE_HIDDEN);
|
|
}
|
|
|
|
nsRect invalid;
|
|
if (item->IsInvalid(invalid)) {
|
|
ownLayer->SetInvalidRectToVisibleRegion();
|
|
}
|
|
|
|
// If it's not a ContainerLayer, we need to apply the scale transform
|
|
// ourselves.
|
|
if (!ownLayer->AsContainerLayer()) {
|
|
ownLayer->SetPostScale(mParameters.mXScale,
|
|
mParameters.mYScale);
|
|
}
|
|
|
|
// Update that layer's clip and visible rects.
|
|
NS_ASSERTION(ownLayer->Manager() == mManager, "Wrong manager");
|
|
NS_ASSERTION(!ownLayer->HasUserData(&gLayerManagerUserData),
|
|
"We shouldn't have a FrameLayerBuilder-managed layer here!");
|
|
NS_ASSERTION(layerClip.HasClip() ||
|
|
layerClip.GetRoundedRectCount() == 0,
|
|
"If we have rounded rects, we must have a clip rect");
|
|
|
|
// It has its own layer. Update that layer's clip and visible rects.
|
|
|
|
ownLayer->SetClipRect(Nothing());
|
|
ownLayer->SetScrolledClip(Nothing());
|
|
if (layerClip.HasClip()) {
|
|
// If the clip moves with the layer, it becomes part of the layer
|
|
// clip. Otherwise, it becomes part of the scrolled clip.
|
|
if (clipMovesWithLayer) {
|
|
ownLayer->SetClipRect(Some(layerClipRect));
|
|
|
|
// rounded rectangle clipping using mask layers
|
|
// (must be done after visible rect is set on layer)
|
|
if (layerClip.IsRectClippedByRoundedCorner(itemContent)) {
|
|
SetupMaskLayer(ownLayer, layerClip, itemVisibleRect);
|
|
}
|
|
} else {
|
|
LayerClip scrolledClip;
|
|
scrolledClip.SetClipRect(layerClipRect);
|
|
if (layerClip.IsRectClippedByRoundedCorner(itemContent)) {
|
|
scrolledClip.SetMaskLayerIndex(
|
|
SetupMaskLayerForScrolledClip(ownLayer.get(), layerClip));
|
|
}
|
|
ownLayer->SetScrolledClip(Some(scrolledClip));
|
|
}
|
|
}
|
|
|
|
ContainerLayer* oldContainer = ownLayer->GetParent();
|
|
if (oldContainer && oldContainer != mContainerLayer) {
|
|
oldContainer->RemoveChild(ownLayer);
|
|
}
|
|
NS_ASSERTION(FindIndexOfLayerIn(mNewChildLayers, ownLayer) < 0,
|
|
"Layer already in list???");
|
|
|
|
NewLayerEntry* newLayerEntry = mNewChildLayers.AppendElement();
|
|
newLayerEntry->mLayer = ownLayer;
|
|
newLayerEntry->mAnimatedGeometryRoot = animatedGeometryRoot;
|
|
newLayerEntry->mScrollClip = agrScrollClip;
|
|
newLayerEntry->mLayerState = layerState;
|
|
if (itemType == nsDisplayItem::TYPE_PERSPECTIVE) {
|
|
newLayerEntry->mIsPerspectiveItem = true;
|
|
}
|
|
|
|
// Don't attempt to flatten compnent alpha layers that are within
|
|
// a forced active layer, or an active transform;
|
|
if (itemType == nsDisplayItem::TYPE_TRANSFORM ||
|
|
layerState == LAYER_ACTIVE_FORCE) {
|
|
newLayerEntry->mPropagateComponentAlphaFlattening = false;
|
|
}
|
|
newLayerEntry->mIsCaret = itemType == nsDisplayItem::TYPE_CARET;
|
|
// nsDisplayTransform::BuildLayer must set layerContentsVisibleRect.
|
|
// We rely on this to ensure 3D transforms compute a reasonable
|
|
// layer visible region.
|
|
NS_ASSERTION(itemType != nsDisplayItem::TYPE_TRANSFORM ||
|
|
layerContentsVisibleRect.width >= 0,
|
|
"Transform items must set layerContentsVisibleRect!");
|
|
if (mLayerBuilder->IsBuildingRetainedLayers()) {
|
|
newLayerEntry->mLayerContentsVisibleRect = layerContentsVisibleRect;
|
|
if (itemType == nsDisplayItem::TYPE_PERSPECTIVE ||
|
|
(itemType == nsDisplayItem::TYPE_TRANSFORM &&
|
|
(item->Frame()->Extend3DContext() ||
|
|
item->Frame()->Combines3DTransformWithAncestors() ||
|
|
item->Frame()->HasPerspective()))) {
|
|
// Give untransformed visible region as outer visible region
|
|
// to avoid failure caused by singular transforms.
|
|
newLayerEntry->mUntransformedVisibleRegion = true;
|
|
newLayerEntry->mVisibleRegion =
|
|
item->GetVisibleRectForChildren().ToOutsidePixels(mAppUnitsPerDevPixel);
|
|
} else {
|
|
newLayerEntry->mVisibleRegion = itemVisibleRect;
|
|
}
|
|
newLayerEntry->mOpaqueRegion = ComputeOpaqueRect(item,
|
|
animatedGeometryRoot, layerClip, aList,
|
|
&newLayerEntry->mHideAllLayersBelow,
|
|
&newLayerEntry->mOpaqueForAnimatedGeometryRootParent);
|
|
} else {
|
|
bool useChildrenVisible =
|
|
itemType == nsDisplayItem::TYPE_TRANSFORM &&
|
|
(item->Frame()->IsPreserve3DLeaf() ||
|
|
item->Frame()->HasPerspective());
|
|
const nsIntRegion &visible = useChildrenVisible ?
|
|
item->GetVisibleRectForChildren().ToOutsidePixels(mAppUnitsPerDevPixel):
|
|
itemVisibleRect;
|
|
|
|
SetOuterVisibleRegionForLayer(ownLayer, visible,
|
|
layerContentsVisibleRect.width >= 0 ? &layerContentsVisibleRect : nullptr,
|
|
useChildrenVisible);
|
|
}
|
|
if (itemType == nsDisplayItem::TYPE_SCROLL_INFO_LAYER) {
|
|
nsDisplayScrollInfoLayer* scrollItem = static_cast<nsDisplayScrollInfoLayer*>(item);
|
|
newLayerEntry->mOpaqueForAnimatedGeometryRootParent = false;
|
|
newLayerEntry->mBaseScrollMetadata =
|
|
scrollItem->ComputeScrollMetadata(ownLayer, mParameters);
|
|
} else if ((itemType == nsDisplayItem::TYPE_SUBDOCUMENT ||
|
|
itemType == nsDisplayItem::TYPE_ZOOM ||
|
|
itemType == nsDisplayItem::TYPE_RESOLUTION) &&
|
|
gfxPrefs::LayoutUseContainersForRootFrames())
|
|
{
|
|
newLayerEntry->mBaseScrollMetadata =
|
|
static_cast<nsDisplaySubDocument*>(item)->ComputeScrollMetadata(ownLayer, mParameters);
|
|
}
|
|
|
|
/**
|
|
* No need to allocate geometry for items that aren't
|
|
* part of a PaintedLayer.
|
|
*/
|
|
mLayerBuilder->AddLayerDisplayItem(ownLayer, item, layerState, nullptr);
|
|
} else {
|
|
PaintedLayerData* paintedLayerData =
|
|
mPaintedLayerDataTree.FindPaintedLayerFor(animatedGeometryRoot, agrScrollClip,
|
|
itemVisibleRect,
|
|
item->Frame()->In3DContextAndBackfaceIsHidden(),
|
|
[&]() {
|
|
return NewPaintedLayerData(item, animatedGeometryRoot, agrScrollClip,
|
|
topLeft, clipMovesWithLayer);
|
|
});
|
|
|
|
if (itemType == nsDisplayItem::TYPE_LAYER_EVENT_REGIONS) {
|
|
nsDisplayLayerEventRegions* eventRegions =
|
|
static_cast<nsDisplayLayerEventRegions*>(item);
|
|
paintedLayerData->AccumulateEventRegions(this, eventRegions);
|
|
} else {
|
|
// check to see if the new item has rounded rect clips in common with
|
|
// other items in the layer
|
|
if (mManager->IsWidgetLayerManager()) {
|
|
paintedLayerData->UpdateCommonClipCount(itemClip);
|
|
}
|
|
nsIntRegion opaquePixels = ComputeOpaqueRect(item,
|
|
animatedGeometryRoot, itemClip, aList,
|
|
&paintedLayerData->mHideAllLayersBelow,
|
|
&paintedLayerData->mOpaqueForAnimatedGeometryRootParent);
|
|
MOZ_ASSERT(nsIntRegion(itemDrawRect).Contains(opaquePixels));
|
|
opaquePixels.AndWith(itemVisibleRect);
|
|
paintedLayerData->Accumulate(this, item, opaquePixels,
|
|
itemVisibleRect, itemClip, layerState);
|
|
|
|
// If we removed the clip from the display item above because it's
|
|
// fixed to the viewport, save it on the PaintedLayerData so we can
|
|
// set it on the layer later.
|
|
if (scrollingClip.HasClip()) {
|
|
paintedLayerData->mItemClip = scrollingClip;
|
|
}
|
|
|
|
if (!paintedLayerData->mLayer) {
|
|
// Try to recycle the old layer of this display item.
|
|
RefPtr<PaintedLayer> layer =
|
|
AttemptToRecyclePaintedLayer(animatedGeometryRoot, item, topLeft);
|
|
if (layer) {
|
|
paintedLayerData->mLayer = layer;
|
|
|
|
NS_ASSERTION(FindIndexOfLayerIn(mNewChildLayers, layer) < 0,
|
|
"Layer already in list???");
|
|
mNewChildLayers[paintedLayerData->mNewChildLayersIndex].mLayer = layer.forget();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (itemSameCoordinateSystemChildren &&
|
|
itemSameCoordinateSystemChildren->NeedsTransparentSurface()) {
|
|
aList->SetNeedsTransparentSurface();
|
|
}
|
|
}
|
|
|
|
aList->AppendToTop(&savedItems);
|
|
}
|
|
|
|
void
|
|
ContainerState::InvalidateForLayerChange(nsDisplayItem* aItem, PaintedLayer* aNewLayer)
|
|
{
|
|
NS_ASSERTION(aItem->GetPerFrameKey(),
|
|
"Display items that render using Thebes must have a key");
|
|
nsDisplayItemGeometry* oldGeometry = nullptr;
|
|
DisplayItemClip* oldClip = nullptr;
|
|
Layer* oldLayer = mLayerBuilder->GetOldLayerFor(aItem, &oldGeometry, &oldClip);
|
|
if (aNewLayer != oldLayer && oldLayer) {
|
|
// The item has changed layers.
|
|
// Invalidate the old bounds in the old layer and new bounds in the new layer.
|
|
PaintedLayer* t = oldLayer->AsPaintedLayer();
|
|
if (t && oldGeometry) {
|
|
// Note that whenever the layer's scale changes, we invalidate the whole thing,
|
|
// so it doesn't matter whether we are using the old scale at last paint
|
|
// or a new scale here
|
|
#ifdef MOZ_DUMP_PAINTING
|
|
if (nsLayoutUtils::InvalidationDebuggingIsEnabled()) {
|
|
printf_stderr("Display item type %s(%p) changed layers %p to %p!\n", aItem->Name(), aItem->Frame(), t, aNewLayer);
|
|
}
|
|
#endif
|
|
InvalidatePostTransformRegion(t,
|
|
oldGeometry->ComputeInvalidationRegion(),
|
|
*oldClip,
|
|
mLayerBuilder->GetLastPaintOffset(t));
|
|
}
|
|
// Clear the old geometry so that invalidation thinks the item has been
|
|
// added this paint.
|
|
mLayerBuilder->ClearCachedGeometry(aItem);
|
|
aItem->NotifyRenderingChanged();
|
|
}
|
|
}
|
|
|
|
void
|
|
FrameLayerBuilder::ComputeGeometryChangeForItem(DisplayItemData* aData)
|
|
{
|
|
nsDisplayItem *item = aData->mItem;
|
|
PaintedLayer* paintedLayer = aData->mLayer->AsPaintedLayer();
|
|
if (!item || !paintedLayer) {
|
|
aData->EndUpdate();
|
|
return;
|
|
}
|
|
|
|
PaintedLayerItemsEntry* entry = mPaintedLayerItems.GetEntry(paintedLayer);
|
|
|
|
nsAutoPtr<nsDisplayItemGeometry> geometry;
|
|
|
|
PaintedDisplayItemLayerUserData* layerData =
|
|
static_cast<PaintedDisplayItemLayerUserData*>(aData->mLayer->GetUserData(&gPaintedDisplayItemLayerUserData));
|
|
nsPoint shift = layerData->mAnimatedGeometryRootOrigin - layerData->mLastAnimatedGeometryRootOrigin;
|
|
|
|
const DisplayItemClip& clip = item->GetClip();
|
|
|
|
// If the frame is marked as invalidated, and didn't specify a rect to invalidate then we want to
|
|
// invalidate both the old and new bounds, otherwise we only want to invalidate the changed areas.
|
|
// If we do get an invalid rect, then we want to add this on top of the change areas.
|
|
nsRect invalid;
|
|
nsRegion combined;
|
|
bool notifyRenderingChanged = true;
|
|
if (!aData->mGeometry) {
|
|
// This item is being added for the first time, invalidate its entire area.
|
|
geometry = item->AllocateGeometry(mDisplayListBuilder);
|
|
combined = clip.ApplyNonRoundedIntersection(geometry->ComputeInvalidationRegion());
|
|
#ifdef MOZ_DUMP_PAINTING
|
|
if (nsLayoutUtils::InvalidationDebuggingIsEnabled()) {
|
|
printf_stderr("Display item type %s(%p) added to layer %p!\n", item->Name(), item->Frame(), aData->mLayer.get());
|
|
}
|
|
#endif
|
|
} else if (aData->mIsInvalid || (item->IsInvalid(invalid) && invalid.IsEmpty())) {
|
|
// Layout marked item/frame as needing repainting (without an explicit rect), invalidate the entire old and new areas.
|
|
geometry = item->AllocateGeometry(mDisplayListBuilder);
|
|
combined = aData->mClip.ApplyNonRoundedIntersection(aData->mGeometry->ComputeInvalidationRegion());
|
|
combined.MoveBy(shift);
|
|
combined.Or(combined, clip.ApplyNonRoundedIntersection(geometry->ComputeInvalidationRegion()));
|
|
#ifdef MOZ_DUMP_PAINTING
|
|
if (nsLayoutUtils::InvalidationDebuggingIsEnabled()) {
|
|
printf_stderr("Display item type %s(%p) (in layer %p) belongs to an invalidated frame!\n", item->Name(), item->Frame(), aData->mLayer.get());
|
|
}
|
|
#endif
|
|
} else {
|
|
// Let the display item check for geometry changes and decide what needs to be
|
|
// repainted.
|
|
|
|
const nsTArray<nsIFrame*>& changedFrames = aData->GetFrameListChanges();
|
|
aData->mGeometry->MoveBy(shift);
|
|
item->ComputeInvalidationRegion(mDisplayListBuilder, aData->mGeometry, &combined);
|
|
|
|
// We have an optimization to cache the drawing of background-attachment: fixed canvas
|
|
// background images so we can scroll and just blit them when they are flattened into
|
|
// the same layer as scrolling content. NotifyRenderingChanged is only used to tell
|
|
// the canvas bg image item to purge this cache. We want to be careful not to accidentally
|
|
// purge the cache if we are just invalidating due to scrolling (ie the background image
|
|
// moves on the scrolling layer but it's rendering stays the same) so if
|
|
// AddOffsetAndComputeDifference is the only thing that will invalidate we skip the
|
|
// NotifyRenderingChanged call (ComputeInvalidationRegion for background images also calls
|
|
// NotifyRenderingChanged if anything changes).
|
|
// Only allocate a new geometry object if something actually changed, otherwise the existing
|
|
// one should be fine. We always reallocate for inactive layers, since these types don't
|
|
// implement ComputeInvalidateRegion (and rely on the ComputeDifferences call in
|
|
// AddPaintedDisplayItem instead).
|
|
if (!combined.IsEmpty() || aData->mLayerState == LAYER_INACTIVE) {
|
|
geometry = item->AllocateGeometry(mDisplayListBuilder);
|
|
} else if (aData->mClip == clip && invalid.IsEmpty() && changedFrames.Length() == 0) {
|
|
notifyRenderingChanged = false;
|
|
}
|
|
aData->mClip.AddOffsetAndComputeDifference(entry->mCommonClipCount,
|
|
shift, aData->mGeometry->ComputeInvalidationRegion(),
|
|
clip, entry->mLastCommonClipCount,
|
|
geometry ? geometry->ComputeInvalidationRegion() :
|
|
aData->mGeometry->ComputeInvalidationRegion(),
|
|
&combined);
|
|
|
|
// Add in any rect that the frame specified
|
|
combined.Or(combined, invalid);
|
|
|
|
for (uint32_t i = 0; i < changedFrames.Length(); i++) {
|
|
combined.Or(combined, changedFrames[i]->GetVisualOverflowRect());
|
|
}
|
|
|
|
// Restrict invalidation to the clipped region
|
|
nsRegion clipRegion;
|
|
if (clip.ComputeRegionInClips(&aData->mClip, shift, &clipRegion)) {
|
|
combined.And(combined, clipRegion);
|
|
}
|
|
#ifdef MOZ_DUMP_PAINTING
|
|
if (nsLayoutUtils::InvalidationDebuggingIsEnabled()) {
|
|
if (!combined.IsEmpty()) {
|
|
printf_stderr("Display item type %s(%p) (in layer %p) changed geometry!\n", item->Name(), item->Frame(), aData->mLayer.get());
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
if (!combined.IsEmpty()) {
|
|
if (notifyRenderingChanged) {
|
|
item->NotifyRenderingChanged();
|
|
}
|
|
InvalidatePostTransformRegion(paintedLayer,
|
|
combined.ScaleToOutsidePixels(layerData->mXScale, layerData->mYScale, layerData->mAppUnitsPerDevPixel),
|
|
layerData->mTranslation);
|
|
}
|
|
|
|
aData->EndUpdate(geometry);
|
|
}
|
|
|
|
void
|
|
FrameLayerBuilder::AddPaintedDisplayItem(PaintedLayerData* aLayerData,
|
|
nsDisplayItem* aItem,
|
|
const DisplayItemClip& aClip,
|
|
ContainerState& aContainerState,
|
|
LayerState aLayerState,
|
|
const nsPoint& aTopLeft)
|
|
{
|
|
PaintedLayer* layer = aLayerData->mLayer;
|
|
PaintedDisplayItemLayerUserData* paintedData =
|
|
static_cast<PaintedDisplayItemLayerUserData*>
|
|
(layer->GetUserData(&gPaintedDisplayItemLayerUserData));
|
|
RefPtr<BasicLayerManager> tempManager;
|
|
nsIntRect intClip;
|
|
bool hasClip = false;
|
|
if (aLayerState != LAYER_NONE) {
|
|
DisplayItemData *data = GetDisplayItemDataForManager(aItem, layer->Manager());
|
|
if (data) {
|
|
tempManager = data->mInactiveManager;
|
|
}
|
|
if (!tempManager) {
|
|
tempManager = new BasicLayerManager(BasicLayerManager::BLM_INACTIVE);
|
|
}
|
|
|
|
// We need to grab these before calling AddLayerDisplayItem because it will overwrite them.
|
|
nsRegion clip;
|
|
DisplayItemClip* oldClip = nullptr;
|
|
GetOldLayerFor(aItem, nullptr, &oldClip);
|
|
hasClip = aClip.ComputeRegionInClips(oldClip,
|
|
aTopLeft - paintedData->mLastAnimatedGeometryRootOrigin,
|
|
&clip);
|
|
|
|
if (hasClip) {
|
|
intClip = clip.GetBounds().ScaleToOutsidePixels(paintedData->mXScale,
|
|
paintedData->mYScale,
|
|
paintedData->mAppUnitsPerDevPixel);
|
|
}
|
|
}
|
|
|
|
AddLayerDisplayItem(layer, aItem, aLayerState, tempManager);
|
|
|
|
PaintedLayerItemsEntry* entry = mPaintedLayerItems.PutEntry(layer);
|
|
if (entry) {
|
|
entry->mContainerLayerFrame = aContainerState.GetContainerFrame();
|
|
if (entry->mContainerLayerGeneration == 0) {
|
|
entry->mContainerLayerGeneration = mContainerLayerGeneration;
|
|
}
|
|
if (tempManager) {
|
|
FLB_LOG_PAINTED_LAYER_DECISION(aLayerData, "Creating nested FLB for item %p\n", aItem);
|
|
FrameLayerBuilder* layerBuilder = new FrameLayerBuilder();
|
|
layerBuilder->Init(mDisplayListBuilder, tempManager, aLayerData);
|
|
|
|
tempManager->BeginTransaction();
|
|
if (mRetainingManager) {
|
|
layerBuilder->DidBeginRetainedLayerTransaction(tempManager);
|
|
}
|
|
|
|
UniquePtr<LayerProperties> props(LayerProperties::CloneFrom(tempManager->GetRoot()));
|
|
RefPtr<Layer> tmpLayer =
|
|
aItem->BuildLayer(mDisplayListBuilder, tempManager, ContainerLayerParameters());
|
|
// We have no easy way of detecting if this transaction will ever actually get finished.
|
|
// For now, I've just silenced the warning with nested transactions in BasicLayers.cpp
|
|
if (!tmpLayer) {
|
|
tempManager->EndTransaction(nullptr, nullptr);
|
|
tempManager->SetUserData(&gLayerManagerLayerBuilder, nullptr);
|
|
return;
|
|
}
|
|
|
|
bool snap;
|
|
nsRect visibleRect =
|
|
aItem->GetVisibleRect().Intersect(aItem->GetBounds(mDisplayListBuilder, &snap));
|
|
nsIntRegion rgn = visibleRect.ToOutsidePixels(paintedData->mAppUnitsPerDevPixel);
|
|
SetOuterVisibleRegion(tmpLayer, &rgn);
|
|
|
|
// If BuildLayer didn't call BuildContainerLayerFor, then our new layer won't have been
|
|
// stored in layerBuilder. Manually add it now.
|
|
if (mRetainingManager) {
|
|
#ifdef DEBUG_DISPLAY_ITEM_DATA
|
|
LayerManagerData* parentLmd = static_cast<LayerManagerData*>
|
|
(layer->Manager()->GetUserData(&gLayerManagerUserData));
|
|
LayerManagerData* lmd = static_cast<LayerManagerData*>
|
|
(tempManager->GetUserData(&gLayerManagerUserData));
|
|
lmd->mParent = parentLmd;
|
|
#endif
|
|
layerBuilder->StoreDataForFrame(aItem, tmpLayer, LAYER_ACTIVE);
|
|
}
|
|
|
|
tempManager->SetRoot(tmpLayer);
|
|
layerBuilder->WillEndTransaction();
|
|
tempManager->AbortTransaction();
|
|
|
|
#ifdef MOZ_DUMP_PAINTING
|
|
if (gfxUtils::DumpDisplayList() || gfxEnv::DumpPaint()) {
|
|
fprintf_stderr(gfxUtils::sDumpPaintFile, "Basic layer tree for painting contents of display item %s(%p):\n", aItem->Name(), aItem->Frame());
|
|
std::stringstream stream;
|
|
tempManager->Dump(stream, "", gfxEnv::DumpPaintToFile());
|
|
fprint_stderr(gfxUtils::sDumpPaintFile, stream); // not a typo, fprint_stderr declared in LayersLogging.h
|
|
}
|
|
#endif
|
|
|
|
nsIntPoint offset = GetLastPaintOffset(layer) - GetTranslationForPaintedLayer(layer);
|
|
props->MoveBy(-offset);
|
|
// Effective transforms are needed by ComputeDifferences().
|
|
tmpLayer->ComputeEffectiveTransforms(Matrix4x4());
|
|
nsIntRegion invalid = props->ComputeDifferences(tmpLayer, nullptr);
|
|
if (aLayerState == LAYER_SVG_EFFECTS) {
|
|
invalid = nsSVGIntegrationUtils::AdjustInvalidAreaForSVGEffects(aItem->Frame(),
|
|
aItem->ToReferenceFrame(),
|
|
invalid);
|
|
}
|
|
if (!invalid.IsEmpty()) {
|
|
#ifdef MOZ_DUMP_PAINTING
|
|
if (nsLayoutUtils::InvalidationDebuggingIsEnabled()) {
|
|
printf_stderr("Inactive LayerManager(%p) for display item %s(%p) has an invalid region - invalidating layer %p\n", tempManager.get(), aItem->Name(), aItem->Frame(), layer);
|
|
}
|
|
#endif
|
|
invalid.ScaleRoundOut(paintedData->mXScale, paintedData->mYScale);
|
|
|
|
if (hasClip) {
|
|
invalid.And(invalid, intClip);
|
|
}
|
|
|
|
InvalidatePostTransformRegion(layer, invalid,
|
|
GetTranslationForPaintedLayer(layer));
|
|
}
|
|
}
|
|
ClippedDisplayItem* cdi =
|
|
entry->mItems.AppendElement(ClippedDisplayItem(aItem,
|
|
mContainerLayerGeneration));
|
|
cdi->mInactiveLayerManager = tempManager;
|
|
}
|
|
}
|
|
|
|
FrameLayerBuilder::DisplayItemData*
|
|
FrameLayerBuilder::StoreDataForFrame(nsDisplayItem* aItem, Layer* aLayer, LayerState aState)
|
|
{
|
|
DisplayItemData* oldData = GetDisplayItemDataForManager(aItem, mRetainingManager);
|
|
if (oldData) {
|
|
if (!oldData->mUsed) {
|
|
oldData->BeginUpdate(aLayer, aState, mContainerLayerGeneration, aItem);
|
|
}
|
|
return oldData;
|
|
}
|
|
|
|
LayerManagerData* lmd = static_cast<LayerManagerData*>
|
|
(mRetainingManager->GetUserData(&gLayerManagerUserData));
|
|
|
|
RefPtr<DisplayItemData> data =
|
|
new DisplayItemData(lmd, aItem->GetPerFrameKey(), aLayer);
|
|
|
|
data->BeginUpdate(aLayer, aState, mContainerLayerGeneration, aItem);
|
|
|
|
lmd->mDisplayItems.PutEntry(data);
|
|
return data;
|
|
}
|
|
|
|
void
|
|
FrameLayerBuilder::StoreDataForFrame(nsIFrame* aFrame,
|
|
uint32_t aDisplayItemKey,
|
|
Layer* aLayer,
|
|
LayerState aState)
|
|
{
|
|
DisplayItemData* oldData = GetDisplayItemData(aFrame, aDisplayItemKey);
|
|
if (oldData && oldData->mFrameList.Length() == 1) {
|
|
oldData->BeginUpdate(aLayer, aState, mContainerLayerGeneration);
|
|
return;
|
|
}
|
|
|
|
LayerManagerData* lmd = static_cast<LayerManagerData*>
|
|
(mRetainingManager->GetUserData(&gLayerManagerUserData));
|
|
|
|
RefPtr<DisplayItemData> data =
|
|
new DisplayItemData(lmd, aDisplayItemKey, aLayer, aFrame);
|
|
|
|
data->BeginUpdate(aLayer, aState, mContainerLayerGeneration);
|
|
|
|
lmd->mDisplayItems.PutEntry(data);
|
|
}
|
|
|
|
FrameLayerBuilder::ClippedDisplayItem::ClippedDisplayItem(nsDisplayItem* aItem,
|
|
uint32_t aGeneration)
|
|
: mItem(aItem)
|
|
, mContainerLayerGeneration(aGeneration)
|
|
{
|
|
}
|
|
|
|
FrameLayerBuilder::ClippedDisplayItem::~ClippedDisplayItem()
|
|
{
|
|
if (mInactiveLayerManager) {
|
|
mInactiveLayerManager->SetUserData(&gLayerManagerLayerBuilder, nullptr);
|
|
}
|
|
}
|
|
|
|
FrameLayerBuilder::PaintedLayerItemsEntry::PaintedLayerItemsEntry(const PaintedLayer *aKey)
|
|
: nsPtrHashKey<PaintedLayer>(aKey)
|
|
, mContainerLayerFrame(nullptr)
|
|
, mLastCommonClipCount(0)
|
|
, mContainerLayerGeneration(0)
|
|
, mHasExplicitLastPaintOffset(false)
|
|
, mCommonClipCount(0)
|
|
{
|
|
}
|
|
|
|
FrameLayerBuilder::PaintedLayerItemsEntry::PaintedLayerItemsEntry(const PaintedLayerItemsEntry& aOther)
|
|
: nsPtrHashKey<PaintedLayer>(aOther.mKey)
|
|
, mItems(aOther.mItems)
|
|
{
|
|
NS_ERROR("Should never be called, since we ALLOW_MEMMOVE");
|
|
}
|
|
|
|
FrameLayerBuilder::PaintedLayerItemsEntry::~PaintedLayerItemsEntry()
|
|
{
|
|
}
|
|
|
|
void
|
|
FrameLayerBuilder::AddLayerDisplayItem(Layer* aLayer,
|
|
nsDisplayItem* aItem,
|
|
LayerState aLayerState,
|
|
BasicLayerManager* aManager)
|
|
{
|
|
if (aLayer->Manager() != mRetainingManager)
|
|
return;
|
|
|
|
DisplayItemData *data = StoreDataForFrame(aItem, aLayer, aLayerState);
|
|
data->mInactiveManager = aManager;
|
|
}
|
|
|
|
nsIntPoint
|
|
FrameLayerBuilder::GetLastPaintOffset(PaintedLayer* aLayer)
|
|
{
|
|
PaintedLayerItemsEntry* entry = mPaintedLayerItems.PutEntry(aLayer);
|
|
if (entry) {
|
|
if (entry->mContainerLayerGeneration == 0) {
|
|
entry->mContainerLayerGeneration = mContainerLayerGeneration;
|
|
}
|
|
if (entry->mHasExplicitLastPaintOffset)
|
|
return entry->mLastPaintOffset;
|
|
}
|
|
return GetTranslationForPaintedLayer(aLayer);
|
|
}
|
|
|
|
void
|
|
FrameLayerBuilder::SavePreviousDataForLayer(PaintedLayer* aLayer, uint32_t aClipCount)
|
|
{
|
|
PaintedLayerItemsEntry* entry = mPaintedLayerItems.PutEntry(aLayer);
|
|
if (entry) {
|
|
if (entry->mContainerLayerGeneration == 0) {
|
|
entry->mContainerLayerGeneration = mContainerLayerGeneration;
|
|
}
|
|
entry->mLastPaintOffset = GetTranslationForPaintedLayer(aLayer);
|
|
entry->mHasExplicitLastPaintOffset = true;
|
|
entry->mLastCommonClipCount = aClipCount;
|
|
}
|
|
}
|
|
|
|
bool
|
|
FrameLayerBuilder::CheckInLayerTreeCompressionMode()
|
|
{
|
|
if (mInLayerTreeCompressionMode) {
|
|
return true;
|
|
}
|
|
|
|
// If we wanted to be in layer tree compression mode, but weren't, then scheduled
|
|
// a delayed repaint where we will be.
|
|
mRootPresContext->PresShell()->GetRootFrame()->SchedulePaint(nsIFrame::PAINT_DELAYED_COMPRESS);
|
|
|
|
return false;
|
|
}
|
|
|
|
void
|
|
ContainerState::CollectOldLayers()
|
|
{
|
|
for (Layer* layer = mContainerLayer->GetFirstChild(); layer;
|
|
layer = layer->GetNextSibling()) {
|
|
NS_ASSERTION(!layer->HasUserData(&gMaskLayerUserData),
|
|
"Mask layer in layer tree; could not be recycled.");
|
|
if (layer->HasUserData(&gPaintedDisplayItemLayerUserData)) {
|
|
NS_ASSERTION(layer->AsPaintedLayer(), "Wrong layer type");
|
|
mPaintedLayersAvailableForRecycling.PutEntry(static_cast<PaintedLayer*>(layer));
|
|
}
|
|
|
|
if (Layer* maskLayer = layer->GetMaskLayer()) {
|
|
NS_ASSERTION(maskLayer->GetType() == Layer::TYPE_IMAGE,
|
|
"Could not recycle mask layer, unsupported layer type.");
|
|
mRecycledMaskImageLayers.Put(MaskLayerKey(layer, Nothing()), static_cast<ImageLayer*>(maskLayer));
|
|
}
|
|
for (size_t i = 0; i < layer->GetAncestorMaskLayerCount(); i++) {
|
|
Layer* maskLayer = layer->GetAncestorMaskLayerAt(i);
|
|
|
|
NS_ASSERTION(maskLayer->GetType() == Layer::TYPE_IMAGE,
|
|
"Could not recycle mask layer, unsupported layer type.");
|
|
mRecycledMaskImageLayers.Put(MaskLayerKey(layer, Some(i)), static_cast<ImageLayer*>(maskLayer));
|
|
}
|
|
}
|
|
}
|
|
|
|
struct OpaqueRegionEntry {
|
|
AnimatedGeometryRoot* mAnimatedGeometryRoot;
|
|
nsIntRegion mOpaqueRegion;
|
|
};
|
|
|
|
static OpaqueRegionEntry*
|
|
FindOpaqueRegionEntry(nsTArray<OpaqueRegionEntry>& aEntries,
|
|
AnimatedGeometryRoot* aAnimatedGeometryRoot)
|
|
{
|
|
for (uint32_t i = 0; i < aEntries.Length(); ++i) {
|
|
OpaqueRegionEntry* d = &aEntries[i];
|
|
if (d->mAnimatedGeometryRoot == aAnimatedGeometryRoot) {
|
|
return d;
|
|
}
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
void
|
|
ContainerState::SetupScrollingMetadata(NewLayerEntry* aEntry)
|
|
{
|
|
if (mFlattenToSingleLayer) {
|
|
// animated geometry roots are forced to all match, so we can't
|
|
// use them and we don't get async scrolling.
|
|
return;
|
|
}
|
|
|
|
if (!mBuilder->IsPaintingToWindow()) {
|
|
// async scrolling not possible, and async scrolling info not computed
|
|
// for this paint.
|
|
return;
|
|
}
|
|
|
|
AutoTArray<ScrollMetadata,2> metricsArray;
|
|
if (aEntry->mBaseScrollMetadata) {
|
|
metricsArray.AppendElement(*aEntry->mBaseScrollMetadata);
|
|
|
|
// The base FrameMetrics was not computed by the nsIScrollableframe, so it
|
|
// should not have a mask layer.
|
|
MOZ_ASSERT(!aEntry->mBaseScrollMetadata->HasMaskLayer());
|
|
}
|
|
|
|
// Any extra mask layers we need to attach to ScrollMetadatas.
|
|
// The list may already contain an entry added for the layer's scrolled clip
|
|
// so add to it rather than overwriting it (we clear the list when recycling
|
|
// a layer).
|
|
nsTArray<RefPtr<Layer>> maskLayers(aEntry->mLayer->GetAllAncestorMaskLayers());
|
|
|
|
for (const DisplayItemScrollClip* scrollClip = aEntry->mScrollClip;
|
|
scrollClip && scrollClip != mContainerScrollClip;
|
|
scrollClip = scrollClip->mParent) {
|
|
if (!scrollClip->mIsAsyncScrollable) {
|
|
// This scroll clip was created for a scroll frame that didn't know
|
|
// whether it needs to be async scrollable for scroll handoff. It was
|
|
// not activated, so we don't need to create a frame metrics for it.
|
|
continue;
|
|
}
|
|
|
|
nsIScrollableFrame* scrollFrame = scrollClip->mScrollableFrame;
|
|
const DisplayItemClip* clip = scrollClip->mClip;
|
|
|
|
Maybe<ScrollMetadata> metadata =
|
|
scrollFrame->ComputeScrollMetadata(aEntry->mLayer, mContainerReferenceFrame, mParameters, clip);
|
|
if (!metadata) {
|
|
continue;
|
|
}
|
|
|
|
if (clip &&
|
|
clip->HasClip() &&
|
|
clip->GetRoundedRectCount() > 0)
|
|
{
|
|
// The clip in between this scrollframe and its ancestor scrollframe
|
|
// requires a mask layer. Since this mask layer should not move with
|
|
// the APZC associated with this FrameMetrics, we attach the mask
|
|
// layer as an additional, separate clip.
|
|
Maybe<size_t> nextIndex = Some(maskLayers.Length());
|
|
RefPtr<Layer> maskLayer =
|
|
CreateMaskLayer(aEntry->mLayer, *clip, nextIndex, clip->GetRoundedRectCount());
|
|
if (maskLayer) {
|
|
MOZ_ASSERT(metadata->HasScrollClip());
|
|
metadata->ScrollClip().SetMaskLayerIndex(nextIndex);
|
|
maskLayers.AppendElement(maskLayer);
|
|
}
|
|
}
|
|
|
|
metricsArray.AppendElement(*metadata);
|
|
}
|
|
|
|
// Watch out for FrameMetrics copies in profiles
|
|
aEntry->mLayer->SetScrollMetadata(metricsArray);
|
|
aEntry->mLayer->SetAncestorMaskLayers(maskLayers);
|
|
}
|
|
|
|
static inline Maybe<ParentLayerIntRect>
|
|
GetStationaryClipInContainer(Layer* aLayer)
|
|
{
|
|
if (size_t metricsCount = aLayer->GetScrollMetadataCount()) {
|
|
return aLayer->GetScrollMetadata(metricsCount - 1).GetClipRect();
|
|
}
|
|
return aLayer->GetClipRect();
|
|
}
|
|
|
|
void
|
|
ContainerState::PostprocessRetainedLayers(nsIntRegion* aOpaqueRegionForContainer)
|
|
{
|
|
AutoTArray<OpaqueRegionEntry,4> opaqueRegions;
|
|
bool hideAll = false;
|
|
int32_t opaqueRegionForContainer = -1;
|
|
|
|
for (int32_t i = mNewChildLayers.Length() - 1; i >= 0; --i) {
|
|
NewLayerEntry* e = &mNewChildLayers.ElementAt(i);
|
|
if (!e->mLayer) {
|
|
continue;
|
|
}
|
|
|
|
// If mFlattenToSingleLayer is true, there isn't going to be any
|
|
// async scrolling so we can apply all our opaqueness to the same
|
|
// entry, the entry for mContainerAnimatedGeometryRoot.
|
|
AnimatedGeometryRoot* animatedGeometryRootForOpaqueness =
|
|
mFlattenToSingleLayer ? mContainerAnimatedGeometryRoot : e->mAnimatedGeometryRoot;
|
|
OpaqueRegionEntry* data = FindOpaqueRegionEntry(opaqueRegions, animatedGeometryRootForOpaqueness);
|
|
|
|
SetupScrollingMetadata(e);
|
|
|
|
if (hideAll) {
|
|
e->mVisibleRegion.SetEmpty();
|
|
} else if (!e->mLayer->IsScrollbarContainer()) {
|
|
Maybe<ParentLayerIntRect> clipRect = GetStationaryClipInContainer(e->mLayer);
|
|
if (clipRect && opaqueRegionForContainer >= 0 &&
|
|
opaqueRegions[opaqueRegionForContainer].mOpaqueRegion.Contains(clipRect->ToUnknownRect())) {
|
|
e->mVisibleRegion.SetEmpty();
|
|
} else if (data) {
|
|
e->mVisibleRegion.Sub(e->mVisibleRegion, data->mOpaqueRegion);
|
|
}
|
|
}
|
|
|
|
SetOuterVisibleRegionForLayer(e->mLayer,
|
|
e->mVisibleRegion,
|
|
e->mLayerContentsVisibleRect.width >= 0 ? &e->mLayerContentsVisibleRect : nullptr,
|
|
e->mUntransformedVisibleRegion);
|
|
|
|
if (!e->mOpaqueRegion.IsEmpty()) {
|
|
AnimatedGeometryRoot* animatedGeometryRootToCover = animatedGeometryRootForOpaqueness;
|
|
if (e->mOpaqueForAnimatedGeometryRootParent &&
|
|
e->mAnimatedGeometryRoot->mParentAGR == mContainerAnimatedGeometryRoot) {
|
|
animatedGeometryRootToCover = mContainerAnimatedGeometryRoot;
|
|
data = FindOpaqueRegionEntry(opaqueRegions, animatedGeometryRootToCover);
|
|
}
|
|
|
|
if (!data) {
|
|
if (animatedGeometryRootToCover == mContainerAnimatedGeometryRoot) {
|
|
NS_ASSERTION(opaqueRegionForContainer == -1, "Already found it?");
|
|
opaqueRegionForContainer = opaqueRegions.Length();
|
|
}
|
|
data = opaqueRegions.AppendElement();
|
|
data->mAnimatedGeometryRoot = animatedGeometryRootToCover;
|
|
}
|
|
|
|
nsIntRegion clippedOpaque = e->mOpaqueRegion;
|
|
Maybe<ParentLayerIntRect> clipRect = e->mLayer->GetCombinedClipRect();
|
|
if (clipRect) {
|
|
clippedOpaque.AndWith(clipRect->ToUnknownRect());
|
|
}
|
|
if (e->mLayer->GetIsFixedPosition() && e->mLayer->GetScrolledClip()) {
|
|
// The clip can move asynchronously, so we can't rely on opaque parts
|
|
// staying in the same place.
|
|
clippedOpaque.SetEmpty();
|
|
}
|
|
data->mOpaqueRegion.Or(data->mOpaqueRegion, clippedOpaque);
|
|
if (e->mHideAllLayersBelow) {
|
|
hideAll = true;
|
|
}
|
|
}
|
|
|
|
if (e->mLayer->GetType() == Layer::TYPE_READBACK) {
|
|
// ReadbackLayers need to accurately read what's behind them. So,
|
|
// we don't want to do any occlusion culling of layers behind them.
|
|
// Theoretically we could just punch out the ReadbackLayer's rectangle
|
|
// from all mOpaqueRegions, but that's probably not worth doing.
|
|
opaqueRegions.Clear();
|
|
opaqueRegionForContainer = -1;
|
|
}
|
|
}
|
|
|
|
if (opaqueRegionForContainer >= 0) {
|
|
aOpaqueRegionForContainer->Or(*aOpaqueRegionForContainer,
|
|
opaqueRegions[opaqueRegionForContainer].mOpaqueRegion);
|
|
}
|
|
}
|
|
|
|
void
|
|
ContainerState::Finish(uint32_t* aTextContentFlags,
|
|
const nsIntRect& aContainerPixelBounds,
|
|
nsDisplayList* aChildItems, bool* aHasComponentAlphaChildren)
|
|
{
|
|
mPaintedLayerDataTree.Finish();
|
|
|
|
if (!mParameters.mForEventsOnly) {
|
|
NS_ASSERTION(mContainerBounds.IsEqualInterior(mAccumulatedChildBounds),
|
|
"Bounds computation mismatch");
|
|
}
|
|
|
|
if (mLayerBuilder->IsBuildingRetainedLayers()) {
|
|
nsIntRegion containerOpaqueRegion;
|
|
PostprocessRetainedLayers(&containerOpaqueRegion);
|
|
if (containerOpaqueRegion.Contains(aContainerPixelBounds)) {
|
|
aChildItems->SetIsOpaque();
|
|
}
|
|
}
|
|
|
|
uint32_t textContentFlags = 0;
|
|
|
|
// Make sure that current/existing layers are added to the parent and are
|
|
// in the correct order.
|
|
Layer* layer = nullptr;
|
|
Layer* prevChild = nullptr;
|
|
for (uint32_t i = 0; i < mNewChildLayers.Length(); ++i, prevChild = layer) {
|
|
if (!mNewChildLayers[i].mLayer) {
|
|
continue;
|
|
}
|
|
|
|
layer = mNewChildLayers[i].mLayer;
|
|
|
|
if (!layer->GetVisibleRegion().IsEmpty()) {
|
|
textContentFlags |=
|
|
layer->GetContentFlags() & (Layer::CONTENT_COMPONENT_ALPHA |
|
|
Layer::CONTENT_COMPONENT_ALPHA_DESCENDANT |
|
|
Layer::CONTENT_DISABLE_FLATTENING);
|
|
|
|
// Notify the parent of component alpha children unless it's coming from
|
|
// within a child that has asked not to contribute to layer flattening.
|
|
if (aHasComponentAlphaChildren &&
|
|
mNewChildLayers[i].mPropagateComponentAlphaFlattening &&
|
|
(layer->GetContentFlags() & Layer::CONTENT_COMPONENT_ALPHA)) {
|
|
|
|
for (int32_t j = i - 1; j >= 0; j--) {
|
|
if (mNewChildLayers[j].mVisibleRegion.Intersects(mNewChildLayers[i].mVisibleRegion.GetBounds())) {
|
|
if (mNewChildLayers[j].mLayerState != LAYER_ACTIVE_FORCE) {
|
|
*aHasComponentAlphaChildren = true;
|
|
}
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!layer->GetParent()) {
|
|
// This is not currently a child of the container, so just add it
|
|
// now.
|
|
mContainerLayer->InsertAfter(layer, prevChild);
|
|
} else {
|
|
NS_ASSERTION(layer->GetParent() == mContainerLayer,
|
|
"Layer shouldn't be the child of some other container");
|
|
if (layer->GetPrevSibling() != prevChild) {
|
|
mContainerLayer->RepositionChild(layer, prevChild);
|
|
}
|
|
}
|
|
}
|
|
|
|
// Remove old layers that have become unused.
|
|
if (!layer) {
|
|
layer = mContainerLayer->GetFirstChild();
|
|
} else {
|
|
layer = layer->GetNextSibling();
|
|
}
|
|
while (layer) {
|
|
Layer *layerToRemove = layer;
|
|
layer = layer->GetNextSibling();
|
|
mContainerLayer->RemoveChild(layerToRemove);
|
|
}
|
|
|
|
*aTextContentFlags = textContentFlags;
|
|
}
|
|
|
|
static inline gfxSize RoundToFloatPrecision(const gfxSize& aSize)
|
|
{
|
|
return gfxSize(float(aSize.width), float(aSize.height));
|
|
}
|
|
|
|
static void RestrictScaleToMaxLayerSize(gfxSize& aScale,
|
|
const nsRect& aVisibleRect,
|
|
nsIFrame* aContainerFrame,
|
|
Layer* aContainerLayer)
|
|
{
|
|
if (!aContainerLayer->Manager()->IsWidgetLayerManager()) {
|
|
return;
|
|
}
|
|
|
|
nsIntRect pixelSize =
|
|
aVisibleRect.ScaleToOutsidePixels(aScale.width, aScale.height,
|
|
aContainerFrame->PresContext()->AppUnitsPerDevPixel());
|
|
|
|
int32_t maxLayerSize = aContainerLayer->GetMaxLayerSize();
|
|
|
|
if (pixelSize.width > maxLayerSize) {
|
|
float scale = (float)pixelSize.width / maxLayerSize;
|
|
scale = gfxUtils::ClampToScaleFactor(scale);
|
|
aScale.width /= scale;
|
|
}
|
|
if (pixelSize.height > maxLayerSize) {
|
|
float scale = (float)pixelSize.height / maxLayerSize;
|
|
scale = gfxUtils::ClampToScaleFactor(scale);
|
|
aScale.height /= scale;
|
|
}
|
|
}
|
|
static bool
|
|
ChooseScaleAndSetTransform(FrameLayerBuilder* aLayerBuilder,
|
|
nsDisplayListBuilder* aDisplayListBuilder,
|
|
nsIFrame* aContainerFrame,
|
|
nsDisplayItem* aContainerItem,
|
|
const nsRect& aVisibleRect,
|
|
const Matrix4x4* aTransform,
|
|
const ContainerLayerParameters& aIncomingScale,
|
|
ContainerLayer* aLayer,
|
|
LayerState aState,
|
|
ContainerLayerParameters& aOutgoingScale)
|
|
{
|
|
nsIntPoint offset;
|
|
|
|
Matrix4x4 transform =
|
|
Matrix4x4::Scaling(aIncomingScale.mXScale, aIncomingScale.mYScale, 1.0);
|
|
if (aTransform) {
|
|
// aTransform is applied first, then the scale is applied to the result
|
|
transform = (*aTransform)*transform;
|
|
// Set any matrix entries close to integers to be those exact integers.
|
|
// This protects against floating-point inaccuracies causing problems
|
|
// in the checks below.
|
|
// We use the fixed epsilon version here because we don't want the nudging
|
|
// to depend on the scroll position.
|
|
transform.NudgeToIntegersFixedEpsilon();
|
|
}
|
|
Matrix transform2d;
|
|
if (aContainerFrame &&
|
|
(aState == LAYER_INACTIVE || aState == LAYER_SVG_EFFECTS) &&
|
|
(!aTransform || (aTransform->Is2D(&transform2d) &&
|
|
!transform2d.HasNonTranslation()))) {
|
|
// When we have an inactive ContainerLayer, translate the container by the offset to the
|
|
// reference frame (and offset all child layers by the reverse) so that the coordinate
|
|
// space of the child layers isn't affected by scrolling.
|
|
// This gets confusing for complicated transform (since we'd have to compute the scale
|
|
// factors for the matrix), so we don't bother. Any frames that are building an nsDisplayTransform
|
|
// for a css transform would have 0,0 as their offset to the reference frame, so this doesn't
|
|
// matter.
|
|
nsPoint appUnitOffset = aDisplayListBuilder->ToReferenceFrame(aContainerFrame);
|
|
nscoord appUnitsPerDevPixel = aContainerFrame->PresContext()->AppUnitsPerDevPixel();
|
|
offset = nsIntPoint(
|
|
NS_lround(NSAppUnitsToDoublePixels(appUnitOffset.x, appUnitsPerDevPixel)*aIncomingScale.mXScale),
|
|
NS_lround(NSAppUnitsToDoublePixels(appUnitOffset.y, appUnitsPerDevPixel)*aIncomingScale.mYScale));
|
|
}
|
|
transform.PostTranslate(offset.x + aIncomingScale.mOffset.x,
|
|
offset.y + aIncomingScale.mOffset.y,
|
|
0);
|
|
|
|
if (transform.IsSingular()) {
|
|
return false;
|
|
}
|
|
|
|
bool canDraw2D = transform.CanDraw2D(&transform2d);
|
|
gfxSize scale;
|
|
// XXX Should we do something for 3D transforms?
|
|
if (canDraw2D &&
|
|
!aContainerFrame->Combines3DTransformWithAncestors() &&
|
|
!aContainerFrame->HasPerspective()) {
|
|
// If the container's transform is animated off main thread, fix a suitable scale size
|
|
// for animation
|
|
if (aContainerItem &&
|
|
aContainerItem->GetType() == nsDisplayItem::TYPE_TRANSFORM &&
|
|
EffectCompositor::HasAnimationsForCompositor(
|
|
aContainerFrame, eCSSProperty_transform)) {
|
|
// Use the size of the nearest widget as the maximum size. This
|
|
// is important since it might be a popup that is bigger than the
|
|
// pres context's size.
|
|
nsPresContext* presContext = aContainerFrame->PresContext();
|
|
nsIWidget* widget = aContainerFrame->GetNearestWidget();
|
|
nsSize displaySize;
|
|
if (widget) {
|
|
LayoutDeviceIntSize widgetSize = widget->GetClientSize();
|
|
int32_t p2a = presContext->AppUnitsPerDevPixel();
|
|
displaySize.width = NSIntPixelsToAppUnits(widgetSize.width, p2a);
|
|
displaySize.height = NSIntPixelsToAppUnits(widgetSize.height, p2a);
|
|
} else {
|
|
displaySize = presContext->GetVisibleArea().Size();
|
|
}
|
|
// compute scale using the animation on the container (ignoring
|
|
// its ancestors)
|
|
scale = nsLayoutUtils::ComputeSuitableScaleForAnimation(
|
|
aContainerFrame, aVisibleRect.Size(),
|
|
displaySize);
|
|
// multiply by the scale inherited from ancestors--we use a uniform
|
|
// scale factor to prevent blurring when the layer is rotated.
|
|
float incomingScale = std::max(aIncomingScale.mXScale, aIncomingScale.mYScale);
|
|
scale.width *= incomingScale;
|
|
scale.height *= incomingScale;
|
|
} else {
|
|
// Scale factors are normalized to a power of 2 to reduce the number of resolution changes
|
|
scale = RoundToFloatPrecision(ThebesMatrix(transform2d).ScaleFactors(true));
|
|
// For frames with a changing transform that's not just a translation,
|
|
// round scale factors up to nearest power-of-2 boundary so that we don't
|
|
// keep having to redraw the content as it scales up and down. Rounding up to nearest
|
|
// power-of-2 boundary ensures we never scale up, only down --- avoiding
|
|
// jaggies. It also ensures we never scale down by more than a factor of 2,
|
|
// avoiding bad downscaling quality.
|
|
Matrix frameTransform;
|
|
if (ActiveLayerTracker::IsStyleAnimated(aDisplayListBuilder, aContainerFrame, eCSSProperty_transform) &&
|
|
aTransform &&
|
|
(!aTransform->Is2D(&frameTransform) || frameTransform.HasNonTranslationOrFlip())) {
|
|
// Don't clamp the scale factor when the new desired scale factor matches the old one
|
|
// or it was previously unscaled.
|
|
bool clamp = true;
|
|
Matrix oldFrameTransform2d;
|
|
if (aLayer->GetBaseTransform().Is2D(&oldFrameTransform2d)) {
|
|
gfxSize oldScale = RoundToFloatPrecision(ThebesMatrix(oldFrameTransform2d).ScaleFactors(true));
|
|
if (oldScale == scale || oldScale == gfxSize(1.0, 1.0)) {
|
|
clamp = false;
|
|
}
|
|
}
|
|
if (clamp) {
|
|
scale.width = gfxUtils::ClampToScaleFactor(scale.width);
|
|
scale.height = gfxUtils::ClampToScaleFactor(scale.height);
|
|
}
|
|
} else {
|
|
// XXX Do we need to move nearly-integer values to integers here?
|
|
}
|
|
}
|
|
// If the scale factors are too small, just use 1.0. The content is being
|
|
// scaled out of sight anyway.
|
|
if (fabs(scale.width) < 1e-8 || fabs(scale.height) < 1e-8) {
|
|
scale = gfxSize(1.0, 1.0);
|
|
}
|
|
// If this is a transform container layer, then pre-rendering might
|
|
// mean we try render a layer bigger than the max texture size. If we have
|
|
// tiling, that's not a problem, since we'll automatically choose a tiled
|
|
// layer for layers of that size. If not, we need to apply clamping to
|
|
// prevent this.
|
|
if (aTransform && !gfxPrefs::LayersTilesEnabled()) {
|
|
RestrictScaleToMaxLayerSize(scale, aVisibleRect, aContainerFrame, aLayer);
|
|
}
|
|
} else {
|
|
scale = gfxSize(1.0, 1.0);
|
|
}
|
|
|
|
// Store the inverse of our resolution-scale on the layer
|
|
aLayer->SetBaseTransform(transform);
|
|
aLayer->SetPreScale(1.0f/float(scale.width),
|
|
1.0f/float(scale.height));
|
|
aLayer->SetInheritedScale(aIncomingScale.mXScale,
|
|
aIncomingScale.mYScale);
|
|
|
|
aOutgoingScale =
|
|
ContainerLayerParameters(scale.width, scale.height, -offset, aIncomingScale);
|
|
if (aTransform) {
|
|
aOutgoingScale.mInTransformedSubtree = true;
|
|
if (ActiveLayerTracker::IsStyleAnimated(aDisplayListBuilder, aContainerFrame,
|
|
eCSSProperty_transform)) {
|
|
aOutgoingScale.mInActiveTransformedSubtree = true;
|
|
}
|
|
}
|
|
if ((aLayerBuilder->IsBuildingRetainedLayers() &&
|
|
(!canDraw2D || transform2d.HasNonIntegerTranslation())) ||
|
|
aContainerFrame->Extend3DContext() ||
|
|
aContainerFrame->Combines3DTransformWithAncestors()) {
|
|
aOutgoingScale.mDisableSubpixelAntialiasingInDescendants = true;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
already_AddRefed<ContainerLayer>
|
|
FrameLayerBuilder::BuildContainerLayerFor(nsDisplayListBuilder* aBuilder,
|
|
LayerManager* aManager,
|
|
nsIFrame* aContainerFrame,
|
|
nsDisplayItem* aContainerItem,
|
|
nsDisplayList* aChildren,
|
|
const ContainerLayerParameters& aParameters,
|
|
const Matrix4x4* aTransform,
|
|
uint32_t aFlags)
|
|
{
|
|
uint32_t containerDisplayItemKey =
|
|
aContainerItem ? aContainerItem->GetPerFrameKey() : nsDisplayItem::TYPE_ZERO;
|
|
NS_ASSERTION(aContainerFrame, "Container display items here should have a frame");
|
|
NS_ASSERTION(!aContainerItem ||
|
|
aContainerItem->Frame() == aContainerFrame,
|
|
"Container display item must match given frame");
|
|
|
|
if (!aParameters.mXScale || !aParameters.mYScale) {
|
|
return nullptr;
|
|
}
|
|
|
|
RefPtr<ContainerLayer> containerLayer;
|
|
if (aManager == mRetainingManager) {
|
|
// Using GetOldLayerFor will search merged frames, as well as the underlying
|
|
// frame. The underlying frame can change when a page scrolls, so this
|
|
// avoids layer recreation in the situation that a new underlying frame is
|
|
// picked for a layer.
|
|
Layer* oldLayer = nullptr;
|
|
if (aContainerItem) {
|
|
oldLayer = GetOldLayerFor(aContainerItem);
|
|
} else {
|
|
DisplayItemData *data = GetOldLayerForFrame(aContainerFrame, containerDisplayItemKey);
|
|
if (data) {
|
|
oldLayer = data->mLayer;
|
|
}
|
|
}
|
|
|
|
if (oldLayer) {
|
|
NS_ASSERTION(oldLayer->Manager() == aManager, "Wrong manager");
|
|
if (oldLayer->HasUserData(&gPaintedDisplayItemLayerUserData)) {
|
|
// The old layer for this item is actually our PaintedLayer
|
|
// because we rendered its layer into that PaintedLayer. So we
|
|
// don't actually have a retained container layer.
|
|
} else {
|
|
NS_ASSERTION(oldLayer->GetType() == Layer::TYPE_CONTAINER,
|
|
"Wrong layer type");
|
|
containerLayer = static_cast<ContainerLayer*>(oldLayer);
|
|
containerLayer->SetMaskLayer(nullptr);
|
|
containerLayer->SetAncestorMaskLayers({});
|
|
}
|
|
}
|
|
}
|
|
if (!containerLayer) {
|
|
// No suitable existing layer was found.
|
|
containerLayer = aManager->CreateContainerLayer();
|
|
if (!containerLayer)
|
|
return nullptr;
|
|
}
|
|
|
|
LayerState state = aContainerItem ? aContainerItem->GetLayerState(aBuilder, aManager, aParameters) : LAYER_ACTIVE;
|
|
if (state == LAYER_INACTIVE &&
|
|
nsDisplayItem::ForceActiveLayers()) {
|
|
state = LAYER_ACTIVE;
|
|
}
|
|
|
|
if (aContainerItem && state == LAYER_ACTIVE_EMPTY) {
|
|
// Empty layers only have metadata and should never have display items. We
|
|
// early exit because later, invalidation will walk up the frame tree to
|
|
// determine which painted layer gets invalidated. Since an empty layer
|
|
// should never have anything to paint, it should never be invalidated.
|
|
NS_ASSERTION(aChildren->IsEmpty(), "Should have no children");
|
|
return containerLayer.forget();
|
|
}
|
|
|
|
const DisplayItemScrollClip* containerScrollClip = aParameters.mScrollClip;
|
|
|
|
ContainerLayerParameters scaleParameters;
|
|
nsRect bounds = aChildren->GetScrollClippedBoundsUpTo(aBuilder, containerScrollClip);
|
|
nsRect childrenVisible =
|
|
aContainerItem ? aContainerItem->GetVisibleRectForChildren() :
|
|
aContainerFrame->GetVisualOverflowRectRelativeToSelf();
|
|
if (!ChooseScaleAndSetTransform(this, aBuilder, aContainerFrame,
|
|
aContainerItem,
|
|
bounds.Intersect(childrenVisible),
|
|
aTransform, aParameters,
|
|
containerLayer, state, scaleParameters)) {
|
|
return nullptr;
|
|
}
|
|
|
|
uint32_t oldGeneration = mContainerLayerGeneration;
|
|
mContainerLayerGeneration = ++mMaxContainerLayerGeneration;
|
|
|
|
RefPtr<RefCountedRegion> paintedLayerInvalidRegion = nullptr;
|
|
if (mRetainingManager) {
|
|
if (aContainerItem) {
|
|
StoreDataForFrame(aContainerItem, containerLayer, LAYER_ACTIVE);
|
|
} else {
|
|
StoreDataForFrame(aContainerFrame, containerDisplayItemKey, containerLayer, LAYER_ACTIVE);
|
|
}
|
|
}
|
|
|
|
LayerManagerData* data = static_cast<LayerManagerData*>
|
|
(aManager->GetUserData(&gLayerManagerUserData));
|
|
|
|
nsIntRect pixBounds;
|
|
nscoord appUnitsPerDevPixel;
|
|
bool flattenToSingleLayer = false;
|
|
if ((aContainerFrame->GetStateBits() & NS_FRAME_NO_COMPONENT_ALPHA) &&
|
|
mRetainingManager &&
|
|
mRetainingManager->ShouldAvoidComponentAlphaLayers() &&
|
|
!nsLayoutUtils::AsyncPanZoomEnabled(aContainerFrame))
|
|
{
|
|
flattenToSingleLayer = true;
|
|
}
|
|
|
|
nscolor backgroundColor = NS_RGBA(0,0,0,0);
|
|
if (aFlags & CONTAINER_ALLOW_PULL_BACKGROUND_COLOR) {
|
|
backgroundColor = aParameters.mBackgroundColor;
|
|
}
|
|
|
|
uint32_t flags;
|
|
while (true) {
|
|
ContainerState state(aBuilder, aManager, aManager->GetLayerBuilder(),
|
|
aContainerFrame, aContainerItem, bounds,
|
|
containerLayer, scaleParameters, flattenToSingleLayer,
|
|
backgroundColor, containerScrollClip);
|
|
|
|
state.ProcessDisplayItems(aChildren);
|
|
|
|
// Set CONTENT_COMPONENT_ALPHA if any of our children have it.
|
|
// This is suboptimal ... a child could have text that's over transparent
|
|
// pixels in its own layer, but over opaque parts of previous siblings.
|
|
bool hasComponentAlphaChildren = false;
|
|
bool mayFlatten =
|
|
mRetainingManager &&
|
|
mRetainingManager->ShouldAvoidComponentAlphaLayers() &&
|
|
!flattenToSingleLayer &&
|
|
!nsLayoutUtils::AsyncPanZoomEnabled(aContainerFrame);
|
|
|
|
pixBounds = state.ScaleToOutsidePixels(bounds, false);
|
|
appUnitsPerDevPixel = state.GetAppUnitsPerDevPixel();
|
|
state.Finish(&flags, pixBounds, aChildren, mayFlatten ? &hasComponentAlphaChildren : nullptr);
|
|
|
|
if (hasComponentAlphaChildren &&
|
|
!(flags & Layer::CONTENT_DISABLE_FLATTENING) &&
|
|
containerLayer->HasMultipleChildren())
|
|
{
|
|
// Since we don't want any component alpha layers on BasicLayers, we repeat
|
|
// the layer building process with this explicitely forced off.
|
|
// We restore the previous FrameLayerBuilder state since the first set
|
|
// of layer building will have changed it.
|
|
flattenToSingleLayer = true;
|
|
|
|
// Restore DisplayItemData
|
|
for (auto iter = data->mDisplayItems.Iter(); !iter.Done(); iter.Next()) {
|
|
DisplayItemData* data = iter.Get()->GetKey();
|
|
if (data->mUsed && data->mContainerLayerGeneration >= mContainerLayerGeneration) {
|
|
iter.Remove();
|
|
}
|
|
}
|
|
|
|
// Restore PaintedLayerItemEntries
|
|
for (auto iter = mPaintedLayerItems.Iter(); !iter.Done(); iter.Next()) {
|
|
PaintedLayerItemsEntry* entry = iter.Get();
|
|
if (entry->mContainerLayerGeneration >= mContainerLayerGeneration) {
|
|
// We can just remove these items rather than attempting to revert them
|
|
// because we're going to want to invalidate everything when transitioning
|
|
// to component alpha flattening.
|
|
iter.Remove();
|
|
continue;
|
|
}
|
|
|
|
for (uint32_t i = 0; i < entry->mItems.Length(); i++) {
|
|
if (entry->mItems[i].mContainerLayerGeneration >= mContainerLayerGeneration) {
|
|
entry->mItems.TruncateLength(i);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
aContainerFrame->AddStateBits(NS_FRAME_NO_COMPONENT_ALPHA);
|
|
continue;
|
|
}
|
|
break;
|
|
}
|
|
|
|
// CONTENT_COMPONENT_ALPHA is propogated up to the nearest CONTENT_OPAQUE
|
|
// ancestor so that BasicLayerManager knows when to copy the background into
|
|
// pushed groups. Accelerated layers managers can't necessarily do this (only
|
|
// when the visible region is a simple rect), so we propogate
|
|
// CONTENT_COMPONENT_ALPHA_DESCENDANT all the way to the root.
|
|
if (flags & Layer::CONTENT_COMPONENT_ALPHA) {
|
|
flags |= Layer::CONTENT_COMPONENT_ALPHA_DESCENDANT;
|
|
}
|
|
|
|
// Make sure that rounding the visible region out didn't add any area
|
|
// we won't paint
|
|
if (aChildren->IsOpaque() && !aChildren->NeedsTransparentSurface()) {
|
|
bounds.ScaleRoundIn(scaleParameters.mXScale, scaleParameters.mYScale);
|
|
if (bounds.Contains(ToAppUnits(pixBounds, appUnitsPerDevPixel))) {
|
|
// Clear CONTENT_COMPONENT_ALPHA and add CONTENT_OPAQUE instead.
|
|
flags &= ~Layer::CONTENT_COMPONENT_ALPHA;
|
|
flags |= Layer::CONTENT_OPAQUE;
|
|
}
|
|
}
|
|
containerLayer->SetContentFlags(flags);
|
|
// If aContainerItem is non-null some BuildContainerLayer further up the
|
|
// call stack is responsible for setting containerLayer's visible region.
|
|
if (!aContainerItem) {
|
|
containerLayer->SetVisibleRegion(LayerIntRegion::FromUnknownRegion(pixBounds));
|
|
}
|
|
if (aParameters.mLayerContentsVisibleRect) {
|
|
*aParameters.mLayerContentsVisibleRect = pixBounds + scaleParameters.mOffset;
|
|
}
|
|
|
|
mContainerLayerGeneration = oldGeneration;
|
|
nsPresContext::ClearNotifySubDocInvalidationData(containerLayer);
|
|
|
|
return containerLayer.forget();
|
|
}
|
|
|
|
Layer*
|
|
FrameLayerBuilder::GetLeafLayerFor(nsDisplayListBuilder* aBuilder,
|
|
nsDisplayItem* aItem)
|
|
{
|
|
Layer* layer = GetOldLayerFor(aItem);
|
|
if (!layer)
|
|
return nullptr;
|
|
if (layer->HasUserData(&gPaintedDisplayItemLayerUserData)) {
|
|
// This layer was created to render Thebes-rendered content for this
|
|
// display item. The display item should not use it for its own
|
|
// layer rendering.
|
|
return nullptr;
|
|
}
|
|
layer->SetMaskLayer(nullptr);
|
|
return layer;
|
|
}
|
|
|
|
/* static */ void
|
|
FrameLayerBuilder::InvalidateAllLayers(LayerManager* aManager)
|
|
{
|
|
LayerManagerData* data = static_cast<LayerManagerData*>
|
|
(aManager->GetUserData(&gLayerManagerUserData));
|
|
if (data) {
|
|
data->mInvalidateAllLayers = true;
|
|
}
|
|
}
|
|
|
|
/* static */ void
|
|
FrameLayerBuilder::InvalidateAllLayersForFrame(nsIFrame *aFrame)
|
|
{
|
|
const nsTArray<DisplayItemData*>* array =
|
|
aFrame->Properties().Get(LayerManagerDataProperty());
|
|
if (array) {
|
|
for (uint32_t i = 0; i < array->Length(); i++) {
|
|
AssertDisplayItemData(array->ElementAt(i))->mParent->mInvalidateAllLayers = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* static */
|
|
Layer*
|
|
FrameLayerBuilder::GetDedicatedLayer(nsIFrame* aFrame, uint32_t aDisplayItemKey)
|
|
{
|
|
//TODO: This isn't completely correct, since a frame could exist as a layer
|
|
// in the normal widget manager, and as a different layer (or no layer)
|
|
// in the secondary manager
|
|
|
|
const nsTArray<DisplayItemData*>* array =
|
|
aFrame->Properties().Get(LayerManagerDataProperty());
|
|
if (array) {
|
|
for (uint32_t i = 0; i < array->Length(); i++) {
|
|
DisplayItemData *element = AssertDisplayItemData(array->ElementAt(i));
|
|
if (!element->mParent->mLayerManager->IsWidgetLayerManager()) {
|
|
continue;
|
|
}
|
|
if (element->mDisplayItemKey == aDisplayItemKey) {
|
|
if (element->mOptLayer) {
|
|
return element->mOptLayer;
|
|
}
|
|
|
|
Layer* layer = element->mLayer;
|
|
if (!layer->HasUserData(&gColorLayerUserData) &&
|
|
!layer->HasUserData(&gImageLayerUserData) &&
|
|
!layer->HasUserData(&gPaintedDisplayItemLayerUserData)) {
|
|
return layer;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
static gfxSize
|
|
PredictScaleForContent(nsIFrame* aFrame, nsIFrame* aAncestorWithScale,
|
|
const gfxSize& aScale)
|
|
{
|
|
Matrix4x4 transform = Matrix4x4::Scaling(aScale.width, aScale.height, 1.0);
|
|
if (aFrame != aAncestorWithScale) {
|
|
// aTransform is applied first, then the scale is applied to the result
|
|
transform = nsLayoutUtils::GetTransformToAncestor(aFrame, aAncestorWithScale)*transform;
|
|
}
|
|
Matrix transform2d;
|
|
if (transform.CanDraw2D(&transform2d)) {
|
|
return ThebesMatrix(transform2d).ScaleFactors(true);
|
|
}
|
|
return gfxSize(1.0, 1.0);
|
|
}
|
|
|
|
gfxSize
|
|
FrameLayerBuilder::GetPaintedLayerScaleForFrame(nsIFrame* aFrame)
|
|
{
|
|
MOZ_ASSERT(aFrame, "need a frame");
|
|
nsIFrame* last = nullptr;
|
|
for (nsIFrame* f = aFrame; f; f = nsLayoutUtils::GetCrossDocParentFrame(f)) {
|
|
last = f;
|
|
|
|
if (nsLayoutUtils::IsPopup(f)) {
|
|
// Don't examine ancestors of a popup. It won't make sense to check
|
|
// the transform from some content inside the popup to some content
|
|
// which is an ancestor of the popup.
|
|
break;
|
|
}
|
|
|
|
const nsTArray<DisplayItemData*>* array =
|
|
f->Properties().Get(LayerManagerDataProperty());
|
|
if (!array) {
|
|
continue;
|
|
}
|
|
|
|
for (uint32_t i = 0; i < array->Length(); i++) {
|
|
Layer* layer = AssertDisplayItemData(array->ElementAt(i))->mLayer;
|
|
ContainerLayer* container = layer->AsContainerLayer();
|
|
if (!container ||
|
|
!layer->Manager()->IsWidgetLayerManager()) {
|
|
continue;
|
|
}
|
|
for (Layer* l = container->GetFirstChild(); l; l = l->GetNextSibling()) {
|
|
PaintedDisplayItemLayerUserData* data =
|
|
static_cast<PaintedDisplayItemLayerUserData*>
|
|
(l->GetUserData(&gPaintedDisplayItemLayerUserData));
|
|
if (data) {
|
|
return PredictScaleForContent(aFrame, f, gfxSize(data->mXScale, data->mYScale));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
float presShellResolution = last->PresContext()->PresShell()->GetResolution();
|
|
return PredictScaleForContent(aFrame, last,
|
|
gfxSize(presShellResolution, presShellResolution));
|
|
}
|
|
|
|
#ifdef MOZ_DUMP_PAINTING
|
|
static void DebugPaintItem(DrawTarget& aDrawTarget,
|
|
nsPresContext* aPresContext,
|
|
nsDisplayItem *aItem,
|
|
nsDisplayListBuilder* aBuilder)
|
|
{
|
|
bool snap;
|
|
Rect bounds = NSRectToRect(aItem->GetBounds(aBuilder, &snap),
|
|
aPresContext->AppUnitsPerDevPixel());
|
|
|
|
RefPtr<DrawTarget> tempDT =
|
|
aDrawTarget.CreateSimilarDrawTarget(IntSize(bounds.width, bounds.height),
|
|
SurfaceFormat::B8G8R8A8);
|
|
RefPtr<gfxContext> context = gfxContext::CreateOrNull(tempDT);
|
|
if (!context) {
|
|
// Leave this as crash, it's in the debugging code, we want to know
|
|
gfxDevCrash(LogReason::InvalidContext) << "DebugPaintItem context problem " << gfx::hexa(tempDT);
|
|
return;
|
|
}
|
|
context->SetMatrix(gfxMatrix::Translation(-bounds.x, -bounds.y));
|
|
nsRenderingContext ctx(context);
|
|
|
|
aItem->Paint(aBuilder, &ctx);
|
|
RefPtr<SourceSurface> surface = tempDT->Snapshot();
|
|
DumpPaintedImage(aItem, surface);
|
|
|
|
aDrawTarget.DrawSurface(surface, bounds, Rect(Point(0,0), bounds.Size()));
|
|
|
|
aItem->SetPainted();
|
|
}
|
|
#endif
|
|
|
|
/* static */ void
|
|
FrameLayerBuilder::RecomputeVisibilityForItems(nsTArray<ClippedDisplayItem>& aItems,
|
|
nsDisplayListBuilder *aBuilder,
|
|
const nsIntRegion& aRegionToDraw,
|
|
const nsIntPoint& aOffset,
|
|
int32_t aAppUnitsPerDevPixel,
|
|
float aXScale,
|
|
float aYScale)
|
|
{
|
|
uint32_t i;
|
|
// Update visible regions. We perform visibility analysis to take account
|
|
// of occlusion culling.
|
|
nsRegion visible = aRegionToDraw.ToAppUnits(aAppUnitsPerDevPixel);
|
|
visible.MoveBy(NSIntPixelsToAppUnits(aOffset.x, aAppUnitsPerDevPixel),
|
|
NSIntPixelsToAppUnits(aOffset.y, aAppUnitsPerDevPixel));
|
|
visible.ScaleInverseRoundOut(aXScale, aYScale);
|
|
|
|
for (i = aItems.Length(); i > 0; --i) {
|
|
ClippedDisplayItem* cdi = &aItems[i - 1];
|
|
const DisplayItemClip& clip = cdi->mItem->GetClip();
|
|
|
|
NS_ASSERTION(AppUnitsPerDevPixel(cdi->mItem) == aAppUnitsPerDevPixel,
|
|
"a painted layer should contain items only at the same zoom");
|
|
|
|
MOZ_ASSERT(clip.HasClip() || clip.GetRoundedRectCount() == 0,
|
|
"If we have rounded rects, we must have a clip rect");
|
|
|
|
if (!clip.IsRectAffectedByClip(visible.GetBounds())) {
|
|
cdi->mItem->RecomputeVisibility(aBuilder, &visible);
|
|
continue;
|
|
}
|
|
|
|
// Do a little dance to account for the fact that we're clipping
|
|
// to cdi->mClipRect
|
|
nsRegion clipped;
|
|
clipped.And(visible, clip.NonRoundedIntersection());
|
|
nsRegion finalClipped = clipped;
|
|
cdi->mItem->RecomputeVisibility(aBuilder, &finalClipped);
|
|
// If we have rounded clip rects, don't subtract from the visible
|
|
// region since we aren't displaying everything inside the rect.
|
|
if (clip.GetRoundedRectCount() == 0) {
|
|
nsRegion removed;
|
|
removed.Sub(clipped, finalClipped);
|
|
nsRegion newVisible;
|
|
newVisible.Sub(visible, removed);
|
|
// Don't let the visible region get too complex.
|
|
if (newVisible.GetNumRects() <= 15) {
|
|
visible = newVisible;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
FrameLayerBuilder::PaintItems(nsTArray<ClippedDisplayItem>& aItems,
|
|
const nsIntRect& aRect,
|
|
gfxContext *aContext,
|
|
nsRenderingContext *aRC,
|
|
nsDisplayListBuilder* aBuilder,
|
|
nsPresContext* aPresContext,
|
|
const nsIntPoint& aOffset,
|
|
float aXScale, float aYScale,
|
|
int32_t aCommonClipCount)
|
|
{
|
|
DrawTarget& aDrawTarget = *aRC->GetDrawTarget();
|
|
|
|
int32_t appUnitsPerDevPixel = aPresContext->AppUnitsPerDevPixel();
|
|
nsRect boundRect = ToAppUnits(aRect, appUnitsPerDevPixel);
|
|
boundRect.MoveBy(NSIntPixelsToAppUnits(aOffset.x, appUnitsPerDevPixel),
|
|
NSIntPixelsToAppUnits(aOffset.y, appUnitsPerDevPixel));
|
|
boundRect.ScaleInverseRoundOut(aXScale, aYScale);
|
|
|
|
DisplayItemClip currentClip;
|
|
bool currentClipIsSetInContext = false;
|
|
DisplayItemClip tmpClip;
|
|
|
|
for (uint32_t i = 0; i < aItems.Length(); ++i) {
|
|
ClippedDisplayItem* cdi = &aItems[i];
|
|
|
|
nsRect paintRect = cdi->mItem->GetVisibleRect().Intersect(boundRect);
|
|
if (paintRect.IsEmpty())
|
|
continue;
|
|
|
|
#ifdef MOZ_DUMP_PAINTING
|
|
PROFILER_LABEL_PRINTF("DisplayList", "Draw",
|
|
js::ProfileEntry::Category::GRAPHICS, "%s", cdi->mItem->Name());
|
|
#else
|
|
PROFILER_LABEL("DisplayList", "Draw",
|
|
js::ProfileEntry::Category::GRAPHICS);
|
|
#endif
|
|
|
|
// If the new desired clip state is different from the current state,
|
|
// update the clip.
|
|
const DisplayItemClip* clip = &cdi->mItem->GetClip();
|
|
if (clip->GetRoundedRectCount() > 0 &&
|
|
!clip->IsRectClippedByRoundedCorner(cdi->mItem->GetVisibleRect())) {
|
|
tmpClip = *clip;
|
|
tmpClip.RemoveRoundedCorners();
|
|
clip = &tmpClip;
|
|
}
|
|
if (currentClipIsSetInContext != clip->HasClip() ||
|
|
(clip->HasClip() && *clip != currentClip)) {
|
|
if (currentClipIsSetInContext) {
|
|
aContext->Restore();
|
|
}
|
|
currentClipIsSetInContext = clip->HasClip();
|
|
if (currentClipIsSetInContext) {
|
|
currentClip = *clip;
|
|
aContext->Save();
|
|
NS_ASSERTION(aCommonClipCount < 100,
|
|
"Maybe you really do have more than a hundred clipping rounded rects, or maybe something has gone wrong.");
|
|
currentClip.ApplyTo(aContext, aPresContext, aCommonClipCount);
|
|
aContext->NewPath();
|
|
}
|
|
}
|
|
|
|
if (cdi->mInactiveLayerManager) {
|
|
bool saved = aDrawTarget.GetPermitSubpixelAA();
|
|
PaintInactiveLayer(aBuilder, cdi->mInactiveLayerManager, cdi->mItem, aContext, aRC);
|
|
aDrawTarget.SetPermitSubpixelAA(saved);
|
|
} else {
|
|
nsIFrame* frame = cdi->mItem->Frame();
|
|
if (aBuilder->IsPaintingToWindow()) {
|
|
frame->AddStateBits(NS_FRAME_PAINTED_THEBES);
|
|
}
|
|
#ifdef MOZ_DUMP_PAINTING
|
|
if (gfxEnv::DumpPaintItems()) {
|
|
DebugPaintItem(aDrawTarget, aPresContext, cdi->mItem, aBuilder);
|
|
} else {
|
|
#else
|
|
{
|
|
#endif
|
|
cdi->mItem->Paint(aBuilder, aRC);
|
|
}
|
|
}
|
|
|
|
if (CheckDOMModified())
|
|
break;
|
|
}
|
|
|
|
if (currentClipIsSetInContext) {
|
|
aContext->Restore();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns true if it is preferred to draw the list of display
|
|
* items separately for each rect in the visible region rather
|
|
* than clipping to a complex region.
|
|
*/
|
|
static bool
|
|
ShouldDrawRectsSeparately(DrawTarget* aDrawTarget, DrawRegionClip aClip)
|
|
{
|
|
if (!gfxPrefs::LayoutPaintRectsSeparately() ||
|
|
aClip == DrawRegionClip::NONE) {
|
|
return false;
|
|
}
|
|
|
|
return !aDrawTarget->SupportsRegionClipping();
|
|
}
|
|
|
|
static void DrawForcedBackgroundColor(DrawTarget& aDrawTarget,
|
|
const IntRect& aBounds,
|
|
nscolor aBackgroundColor)
|
|
{
|
|
if (NS_GET_A(aBackgroundColor) > 0) {
|
|
ColorPattern color(ToDeviceColor(aBackgroundColor));
|
|
aDrawTarget.FillRect(Rect(aBounds), color);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* A note on residual transforms:
|
|
*
|
|
* In a transformed subtree we sometimes apply the PaintedLayer's
|
|
* "residual transform" when drawing content into the PaintedLayer.
|
|
* This is a translation by components in the range [-0.5,0.5) provided
|
|
* by the layer system; applying the residual transform followed by the
|
|
* transforms used by layer compositing ensures that the subpixel alignment
|
|
* of the content of the PaintedLayer exactly matches what it would be if
|
|
* we used cairo/Thebes to draw directly to the screen without going through
|
|
* retained layer buffers.
|
|
*
|
|
* The visible and valid regions of the PaintedLayer are computed without
|
|
* knowing the residual transform (because we don't know what the residual
|
|
* transform is going to be until we've built the layer tree!). So we have to
|
|
* consider whether content painted in the range [x, xmost) might be painted
|
|
* outside the visible region we computed for that content. The visible region
|
|
* would be [floor(x), ceil(xmost)). The content would be rendered at
|
|
* [x + r, xmost + r), where -0.5 <= r < 0.5. So some half-rendered pixels could
|
|
* indeed fall outside the computed visible region, which is not a big deal;
|
|
* similar issues already arise when we snap cliprects to nearest pixels.
|
|
* Note that if the rendering of the content is snapped to nearest pixels ---
|
|
* which it often is --- then the content is actually rendered at
|
|
* [snap(x + r), snap(xmost + r)). It turns out that floor(x) <= snap(x + r)
|
|
* and ceil(xmost) >= snap(xmost + r), so the rendering of snapped content
|
|
* always falls within the visible region we computed.
|
|
*/
|
|
|
|
/* static */ void
|
|
FrameLayerBuilder::DrawPaintedLayer(PaintedLayer* aLayer,
|
|
gfxContext* aContext,
|
|
const nsIntRegion& aRegionToDraw,
|
|
const nsIntRegion& aDirtyRegion,
|
|
DrawRegionClip aClip,
|
|
const nsIntRegion& aRegionToInvalidate,
|
|
void* aCallbackData)
|
|
{
|
|
DrawTarget& aDrawTarget = *aContext->GetDrawTarget();
|
|
|
|
PROFILER_LABEL("FrameLayerBuilder", "DrawPaintedLayer",
|
|
js::ProfileEntry::Category::GRAPHICS);
|
|
|
|
nsDisplayListBuilder* builder = static_cast<nsDisplayListBuilder*>
|
|
(aCallbackData);
|
|
|
|
FrameLayerBuilder *layerBuilder = aLayer->Manager()->GetLayerBuilder();
|
|
NS_ASSERTION(layerBuilder, "Unexpectedly null layer builder!");
|
|
|
|
if (layerBuilder->CheckDOMModified())
|
|
return;
|
|
|
|
PaintedLayerItemsEntry* entry = layerBuilder->mPaintedLayerItems.GetEntry(aLayer);
|
|
NS_ASSERTION(entry, "We shouldn't be drawing into a layer with no items!");
|
|
if (!entry->mContainerLayerFrame) {
|
|
return;
|
|
}
|
|
|
|
|
|
PaintedDisplayItemLayerUserData* userData =
|
|
static_cast<PaintedDisplayItemLayerUserData*>
|
|
(aLayer->GetUserData(&gPaintedDisplayItemLayerUserData));
|
|
NS_ASSERTION(userData, "where did our user data go?");
|
|
|
|
bool shouldDrawRectsSeparately =
|
|
ShouldDrawRectsSeparately(&aDrawTarget, aClip);
|
|
|
|
if (!shouldDrawRectsSeparately) {
|
|
if (aClip == DrawRegionClip::DRAW) {
|
|
gfxUtils::ClipToRegion(aContext, aRegionToDraw);
|
|
}
|
|
|
|
DrawForcedBackgroundColor(aDrawTarget, aRegionToDraw.GetBounds(),
|
|
userData->mForcedBackgroundColor);
|
|
}
|
|
|
|
if (NS_GET_A(userData->mFontSmoothingBackgroundColor) > 0) {
|
|
aContext->SetFontSmoothingBackgroundColor(
|
|
Color::FromABGR(userData->mFontSmoothingBackgroundColor));
|
|
}
|
|
|
|
// make the origin of the context coincide with the origin of the
|
|
// PaintedLayer
|
|
gfxContextMatrixAutoSaveRestore saveMatrix(aContext);
|
|
nsIntPoint offset = GetTranslationForPaintedLayer(aLayer);
|
|
nsPresContext* presContext = entry->mContainerLayerFrame->PresContext();
|
|
|
|
if (!userData->mVisibilityComputedRegion.Contains(aDirtyRegion) &&
|
|
!layerBuilder->GetContainingPaintedLayerData()) {
|
|
// Recompute visibility of items in our PaintedLayer, if required. Note
|
|
// that this recomputes visibility for all descendants of our display
|
|
// items too, so there's no need to do this for the items in inactive
|
|
// PaintedLayers. If aDirtyRegion has not changed since the previous call
|
|
// then we can skip this.
|
|
int32_t appUnitsPerDevPixel = presContext->AppUnitsPerDevPixel();
|
|
RecomputeVisibilityForItems(entry->mItems, builder, aDirtyRegion,
|
|
offset, appUnitsPerDevPixel,
|
|
userData->mXScale, userData->mYScale);
|
|
userData->mVisibilityComputedRegion = aDirtyRegion;
|
|
}
|
|
|
|
nsRenderingContext rc(aContext);
|
|
|
|
if (shouldDrawRectsSeparately) {
|
|
for (auto iter = aRegionToDraw.RectIter(); !iter.Done(); iter.Next()) {
|
|
const nsIntRect& iterRect = iter.Get();
|
|
gfxContextAutoSaveRestore save(aContext);
|
|
aContext->NewPath();
|
|
aContext->Rectangle(ThebesRect(iterRect));
|
|
aContext->Clip();
|
|
|
|
DrawForcedBackgroundColor(aDrawTarget, iterRect,
|
|
userData->mForcedBackgroundColor);
|
|
|
|
// Apply the residual transform if it has been enabled, to ensure that
|
|
// snapping when we draw into aContext exactly matches the ideal transform.
|
|
// See above for why this is OK.
|
|
aContext->SetMatrix(
|
|
aContext->CurrentMatrix().Translate(aLayer->GetResidualTranslation() - gfxPoint(offset.x, offset.y)).
|
|
Scale(userData->mXScale, userData->mYScale));
|
|
|
|
layerBuilder->PaintItems(entry->mItems, iterRect, aContext, &rc,
|
|
builder, presContext,
|
|
offset, userData->mXScale, userData->mYScale,
|
|
entry->mCommonClipCount);
|
|
if (gfxPrefs::GfxLoggingPaintedPixelCountEnabled()) {
|
|
aLayer->Manager()->AddPaintedPixelCount(iterRect.Area());
|
|
}
|
|
}
|
|
} else {
|
|
// Apply the residual transform if it has been enabled, to ensure that
|
|
// snapping when we draw into aContext exactly matches the ideal transform.
|
|
// See above for why this is OK.
|
|
aContext->SetMatrix(
|
|
aContext->CurrentMatrix().Translate(aLayer->GetResidualTranslation() - gfxPoint(offset.x, offset.y)).
|
|
Scale(userData->mXScale,userData->mYScale));
|
|
|
|
layerBuilder->PaintItems(entry->mItems, aRegionToDraw.GetBounds(), aContext, &rc,
|
|
builder, presContext,
|
|
offset, userData->mXScale, userData->mYScale,
|
|
entry->mCommonClipCount);
|
|
if (gfxPrefs::GfxLoggingPaintedPixelCountEnabled()) {
|
|
aLayer->Manager()->AddPaintedPixelCount(
|
|
aRegionToDraw.GetBounds().Area());
|
|
}
|
|
}
|
|
|
|
aContext->SetFontSmoothingBackgroundColor(Color());
|
|
|
|
bool isActiveLayerManager = !aLayer->Manager()->IsInactiveLayerManager();
|
|
|
|
if (presContext->GetPaintFlashing() && isActiveLayerManager) {
|
|
gfxContextAutoSaveRestore save(aContext);
|
|
if (shouldDrawRectsSeparately) {
|
|
if (aClip == DrawRegionClip::DRAW) {
|
|
gfxUtils::ClipToRegion(aContext, aRegionToDraw);
|
|
}
|
|
}
|
|
FlashPaint(aContext);
|
|
}
|
|
|
|
if (presContext->GetDocShell() && isActiveLayerManager) {
|
|
nsDocShell* docShell = static_cast<nsDocShell*>(presContext->GetDocShell());
|
|
RefPtr<TimelineConsumers> timelines = TimelineConsumers::Get();
|
|
|
|
if (timelines && timelines->HasConsumer(docShell)) {
|
|
timelines->AddMarkerForDocShell(docShell, Move(
|
|
MakeUnique<LayerTimelineMarker>(aRegionToDraw)));
|
|
}
|
|
}
|
|
|
|
if (!aRegionToInvalidate.IsEmpty()) {
|
|
aLayer->AddInvalidRect(aRegionToInvalidate.GetBounds());
|
|
}
|
|
}
|
|
|
|
bool
|
|
FrameLayerBuilder::CheckDOMModified()
|
|
{
|
|
if (!mRootPresContext ||
|
|
mInitialDOMGeneration == mRootPresContext->GetDOMGeneration())
|
|
return false;
|
|
if (mDetectedDOMModification) {
|
|
// Don't spam the console with extra warnings
|
|
return true;
|
|
}
|
|
mDetectedDOMModification = true;
|
|
// Painting is not going to complete properly. There's not much
|
|
// we can do here though. Invalidating the window to get another repaint
|
|
// is likely to lead to an infinite repaint loop.
|
|
NS_WARNING("Detected DOM modification during paint, bailing out!");
|
|
return true;
|
|
}
|
|
|
|
/* static */ void
|
|
FrameLayerBuilder::DumpRetainedLayerTree(LayerManager* aManager, std::stringstream& aStream, bool aDumpHtml)
|
|
{
|
|
aManager->Dump(aStream, "", aDumpHtml);
|
|
}
|
|
|
|
nsDisplayItemGeometry*
|
|
FrameLayerBuilder::GetMostRecentGeometry(nsDisplayItem* aItem)
|
|
{
|
|
typedef nsTArray<DisplayItemData*> DataArray;
|
|
|
|
// Retrieve the array of DisplayItemData associated with our frame.
|
|
FrameProperties properties = aItem->Frame()->Properties();
|
|
const DataArray* dataArray =
|
|
properties.Get(LayerManagerDataProperty());
|
|
if (!dataArray) {
|
|
return nullptr;
|
|
}
|
|
|
|
// Find our display item data, if it exists, and return its geometry.
|
|
uint32_t itemPerFrameKey = aItem->GetPerFrameKey();
|
|
for (uint32_t i = 0; i < dataArray->Length(); i++) {
|
|
DisplayItemData* data = AssertDisplayItemData(dataArray->ElementAt(i));
|
|
if (data->GetDisplayItemKey() == itemPerFrameKey) {
|
|
return data->GetGeometry();
|
|
}
|
|
}
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
gfx::Rect
|
|
CalculateBounds(const nsTArray<DisplayItemClip::RoundedRect>& aRects, int32_t A2D)
|
|
{
|
|
nsRect bounds = aRects[0].mRect;
|
|
for (uint32_t i = 1; i < aRects.Length(); ++i) {
|
|
bounds.UnionRect(bounds, aRects[i].mRect);
|
|
}
|
|
|
|
return gfx::ToRect(nsLayoutUtils::RectToGfxRect(bounds, A2D));
|
|
}
|
|
|
|
static void
|
|
SetClipCount(PaintedDisplayItemLayerUserData* apaintedData,
|
|
uint32_t aClipCount)
|
|
{
|
|
if (apaintedData) {
|
|
apaintedData->mMaskClipCount = aClipCount;
|
|
}
|
|
}
|
|
|
|
void
|
|
ContainerState::SetupMaskLayer(Layer *aLayer,
|
|
const DisplayItemClip& aClip,
|
|
const nsIntRegion& aLayerVisibleRegion,
|
|
uint32_t aRoundedRectClipCount)
|
|
{
|
|
// if the number of clips we are going to mask has decreased, then aLayer might have
|
|
// cached graphics which assume the existence of a soon-to-be non-existent mask layer
|
|
// in that case, invalidate the whole layer.
|
|
PaintedDisplayItemLayerUserData* paintedData = GetPaintedDisplayItemLayerUserData(aLayer);
|
|
if (paintedData &&
|
|
aRoundedRectClipCount < paintedData->mMaskClipCount) {
|
|
PaintedLayer* painted = aLayer->AsPaintedLayer();
|
|
painted->InvalidateRegion(painted->GetValidRegion().GetBounds());
|
|
}
|
|
|
|
// don't build an unnecessary mask
|
|
nsIntRect layerBounds = aLayerVisibleRegion.GetBounds();
|
|
if (aClip.GetRoundedRectCount() == 0 ||
|
|
aRoundedRectClipCount == 0 ||
|
|
layerBounds.IsEmpty()) {
|
|
SetClipCount(paintedData, 0);
|
|
return;
|
|
}
|
|
|
|
RefPtr<Layer> maskLayer =
|
|
CreateMaskLayer(aLayer, aClip, Nothing(), aRoundedRectClipCount);
|
|
|
|
if (!maskLayer) {
|
|
SetClipCount(paintedData, 0);
|
|
return;
|
|
}
|
|
|
|
aLayer->SetMaskLayer(maskLayer);
|
|
SetClipCount(paintedData, aRoundedRectClipCount);
|
|
}
|
|
|
|
already_AddRefed<Layer>
|
|
ContainerState::CreateMaskLayer(Layer *aLayer,
|
|
const DisplayItemClip& aClip,
|
|
const Maybe<size_t>& aForAncestorMaskLayer,
|
|
uint32_t aRoundedRectClipCount)
|
|
{
|
|
// check if we can re-use the mask layer
|
|
MaskLayerKey recycleKey(aLayer, aForAncestorMaskLayer);
|
|
RefPtr<ImageLayer> maskLayer = CreateOrRecycleMaskImageLayerFor(recycleKey);
|
|
MaskLayerUserData* userData = GetMaskLayerUserData(maskLayer);
|
|
|
|
MaskLayerUserData newData;
|
|
aClip.AppendRoundedRects(&newData.mRoundedClipRects, aRoundedRectClipCount);
|
|
newData.mScaleX = mParameters.mXScale;
|
|
newData.mScaleY = mParameters.mYScale;
|
|
newData.mOffset = mParameters.mOffset;
|
|
newData.mAppUnitsPerDevPixel = mContainerFrame->PresContext()->AppUnitsPerDevPixel();
|
|
|
|
if (*userData == newData) {
|
|
return maskLayer.forget();
|
|
}
|
|
|
|
// calculate a more precise bounding rect
|
|
gfx::Rect boundingRect = CalculateBounds(newData.mRoundedClipRects,
|
|
newData.mAppUnitsPerDevPixel);
|
|
boundingRect.Scale(mParameters.mXScale, mParameters.mYScale);
|
|
|
|
uint32_t maxSize = mManager->GetMaxTextureSize();
|
|
NS_ASSERTION(maxSize > 0, "Invalid max texture size");
|
|
gfx::Size surfaceSize(std::min<gfx::Float>(boundingRect.Width(), maxSize),
|
|
std::min<gfx::Float>(boundingRect.Height(), maxSize));
|
|
|
|
// maskTransform is applied to the clip when it is painted into the mask (as a
|
|
// component of imageTransform), and its inverse used when the mask is used for
|
|
// masking.
|
|
// It is the transform from the masked layer's space to mask space
|
|
gfx::Matrix maskTransform =
|
|
Matrix::Scaling(surfaceSize.width / boundingRect.Width(),
|
|
surfaceSize.height / boundingRect.Height());
|
|
gfx::Point p = boundingRect.TopLeft();
|
|
maskTransform.PreTranslate(-p.x, -p.y);
|
|
// imageTransform is only used when the clip is painted to the mask
|
|
gfx::Matrix imageTransform = maskTransform;
|
|
imageTransform.PreScale(mParameters.mXScale, mParameters.mYScale);
|
|
|
|
nsAutoPtr<MaskLayerImageCache::MaskLayerImageKey> newKey(
|
|
new MaskLayerImageCache::MaskLayerImageKey());
|
|
|
|
// copy and transform the rounded rects
|
|
for (uint32_t i = 0; i < newData.mRoundedClipRects.Length(); ++i) {
|
|
newKey->mRoundedClipRects.AppendElement(
|
|
MaskLayerImageCache::PixelRoundedRect(newData.mRoundedClipRects[i],
|
|
mContainerFrame->PresContext()));
|
|
newKey->mRoundedClipRects[i].ScaleAndTranslate(imageTransform);
|
|
}
|
|
newKey->mForwarder = mManager->AsShadowForwarder();
|
|
|
|
const MaskLayerImageCache::MaskLayerImageKey* lookupKey = newKey;
|
|
|
|
// check to see if we can reuse a mask image
|
|
RefPtr<ImageContainer> container =
|
|
GetMaskLayerImageCache()->FindImageFor(&lookupKey);
|
|
|
|
if (!container) {
|
|
// Make mask image width aligned to 4. See Bug 1245552.
|
|
IntSize surfaceSizeInt(GetAlignedStride<4>(NSToIntCeil(surfaceSize.width)),
|
|
NSToIntCeil(surfaceSize.height));
|
|
// no existing mask image, so build a new one
|
|
MaskImageData imageData(surfaceSizeInt, mManager);
|
|
RefPtr<DrawTarget> dt = imageData.CreateDrawTarget();
|
|
|
|
// fail if we can't get the right surface
|
|
if (!dt || !dt->IsValid()) {
|
|
NS_WARNING("Could not create DrawTarget for mask layer.");
|
|
return nullptr;
|
|
}
|
|
|
|
RefPtr<gfxContext> context = gfxContext::CreateOrNull(dt);
|
|
MOZ_ASSERT(context); // already checked the draw target above
|
|
context->Multiply(ThebesMatrix(imageTransform));
|
|
|
|
// paint the clipping rects with alpha to create the mask
|
|
aClip.FillIntersectionOfRoundedRectClips(context,
|
|
Color(1.f, 1.f, 1.f, 1.f),
|
|
newData.mAppUnitsPerDevPixel,
|
|
0,
|
|
aRoundedRectClipCount);
|
|
|
|
// build the image and container
|
|
container = aLayer->Manager()->CreateImageContainer();
|
|
NS_ASSERTION(container, "Could not create image container for mask layer.");
|
|
|
|
RefPtr<Image> image = imageData.CreateImage();
|
|
if (!image) {
|
|
return nullptr;
|
|
}
|
|
container->SetCurrentImageInTransaction(image);
|
|
|
|
GetMaskLayerImageCache()->PutImage(newKey.forget(), container);
|
|
}
|
|
|
|
maskLayer->SetContainer(container);
|
|
|
|
maskTransform.Invert();
|
|
Matrix4x4 matrix = Matrix4x4::From2D(maskTransform);
|
|
matrix.PreTranslate(mParameters.mOffset.x, mParameters.mOffset.y, 0);
|
|
maskLayer->SetBaseTransform(matrix);
|
|
|
|
// save the details of the clip in user data
|
|
userData->mScaleX = newData.mScaleX;
|
|
userData->mScaleY = newData.mScaleY;
|
|
userData->mOffset = newData.mOffset;
|
|
userData->mAppUnitsPerDevPixel = newData.mAppUnitsPerDevPixel;
|
|
userData->mRoundedClipRects.SwapElements(newData.mRoundedClipRects);
|
|
userData->mImageKey.Reset(lookupKey);
|
|
|
|
return maskLayer.forget();
|
|
}
|
|
|
|
} // namespace mozilla
|