mirror of
https://github.com/mozilla/gecko-dev.git
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3422 lines
126 KiB
C++
3422 lines
126 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 "FrameLayerBuilder.h"
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#include "nsDisplayList.h"
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#include "nsPresContext.h"
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#include "nsLayoutUtils.h"
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#include "Layers.h"
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#include "BasicLayers.h"
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#include "nsSubDocumentFrame.h"
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#include "nsCSSRendering.h"
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#include "nsCSSFrameConstructor.h"
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#include "gfxUtils.h"
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#include "nsImageFrame.h"
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#include "nsRenderingContext.h"
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#include "MaskLayerImageCache.h"
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#include "nsIScrollableFrame.h"
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#include "mozilla/Preferences.h"
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#include "sampler.h"
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#include "nsAnimationManager.h"
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#include "nsTransitionManager.h"
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#ifdef DEBUG
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#include <stdio.h>
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#endif
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using namespace mozilla::layers;
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namespace mozilla {
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FrameLayerBuilder::DisplayItemData::DisplayItemData(Layer* aLayer, uint32_t aKey, LayerState aLayerState, uint32_t aGeneration)
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: mLayer(aLayer)
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, mDisplayItemKey(aKey)
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, mContainerLayerGeneration(aGeneration)
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, mLayerState(aLayerState)
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{}
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FrameLayerBuilder::DisplayItemData::~DisplayItemData()
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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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LayerManagerData(LayerManager *aManager) :
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mInvalidateAllLayers(false),
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mLayerManager(aManager)
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{
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MOZ_COUNT_CTOR(LayerManagerData);
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mFramesWithLayers.Init();
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}
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~LayerManagerData() {
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// Remove display item data properties now, since we won't be able
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// to find these frames again without mFramesWithLayers.
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mFramesWithLayers.EnumerateEntries(
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FrameLayerBuilder::RemoveDisplayItemDataForFrame, nullptr);
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MOZ_COUNT_DTOR(LayerManagerData);
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}
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/**
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* Tracks which frames have layers associated with them.
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*/
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nsTHashtable<FrameLayerBuilder::DisplayItemDataEntry> mFramesWithLayers;
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bool mInvalidateAllLayers;
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/** Layer manager we belong to, we hold a reference to this object. */
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nsRefPtr<LayerManager> mLayerManager;
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};
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LayerManagerLayerBuilder::~LayerManagerLayerBuilder()
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{
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MOZ_COUNT_DTOR(LayerManagerLayerBuilder);
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if (mDelete) {
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delete mLayerBuilder;
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}
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}
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namespace {
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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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static void DestroyRefCountedRegion(void* aPropertyValue)
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{
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static_cast<RefCountedRegion*>(aPropertyValue)->Release();
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}
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/**
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* This property represents a region that should be invalidated in every
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* ThebesLayer child whose parent ContainerLayer is associated with the
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* frame. This is an nsRegion*; the coordinates of the region are
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* relative to the top-left of the border-box of the frame the property
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* is attached to (which is the frame for the ContainerLayer).
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*
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* We add to this region in InvalidateThebesLayerContents. The region
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* is propagated to ContainerState in BuildContainerLayerFor, and then
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* the region(s) are actually invalidated in CreateOrRecycleThebesLayer.
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*
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* When the property value is null, the region is infinite --- i.e. all
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* areas of the ThebesLayers should be invalidated.
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*/
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NS_DECLARE_FRAME_PROPERTY(ThebesLayerInvalidRegionProperty, DestroyRefCountedRegion)
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static void DestroyPoint(void* aPropertyValue)
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{
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delete static_cast<nsPoint*>(aPropertyValue);
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}
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/**
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* The valid content in our child ThebesLayers is defined relative to
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* the offset from this frame to its active scroll root, mapped back
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* by the ThebesLayer's inverse transform. Since we accumulate the
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* region invalidated between last-paint and next-paint, and because
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* the offset of this frame to its active root may change during that
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* period, we save the offset at last-paint in this property and use
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* it to invalidate at next-paint.
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*/
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NS_DECLARE_FRAME_PROPERTY(ThebesLayerLastPaintOffsetProperty, DestroyPoint)
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/**
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* This is a helper object used to build up the layer children for
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* a ContainerLayer.
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*/
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class ContainerState {
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public:
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ContainerState(nsDisplayListBuilder* aBuilder,
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LayerManager* aManager,
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FrameLayerBuilder* aLayerBuilder,
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nsIFrame* aContainerFrame,
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ContainerLayer* aContainerLayer,
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const FrameLayerBuilder::ContainerParameters& aParameters) :
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mBuilder(aBuilder), mManager(aManager),
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mLayerBuilder(aLayerBuilder),
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mContainerFrame(aContainerFrame), mContainerLayer(aContainerLayer),
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mParameters(aParameters),
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mNextFreeRecycledThebesLayer(0), mInvalidateAllThebesContent(false)
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{
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nsPresContext* presContext = aContainerFrame->PresContext();
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mAppUnitsPerDevPixel = presContext->AppUnitsPerDevPixel();
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// When AllowResidualTranslation is false, display items will be drawn
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// scaled with a translation by integer pixels, so we know how the snapping
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// will work.
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mSnappingEnabled = aManager->IsSnappingEffectiveTransforms() &&
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!mParameters.AllowResidualTranslation();
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mRecycledMaskImageLayers.Init();
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CollectOldLayers();
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}
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enum ProcessDisplayItemsFlags {
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NO_COMPONENT_ALPHA = 0x01,
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};
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void AddInvalidThebesContent(const nsIntRegion& aRegion)
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{
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mInvalidThebesContent.Or(mInvalidThebesContent, aRegion);
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}
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void SetInvalidateAllThebesContent()
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{
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mInvalidateAllThebesContent = true;
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}
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/**
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* This is the method that actually walks a display list and builds
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* the child layers. We invoke it recursively to process clipped sublists.
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* @param aClipRect the clip rect to apply to the list items, or null
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* if no clipping is required
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*/
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void ProcessDisplayItems(const nsDisplayList& aList,
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FrameLayerBuilder::Clip& aClip,
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uint32_t aFlags);
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/**
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* This finalizes all the open ThebesLayers by popping every element off
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* mThebesLayerDataStack, then sets the children of the container layer
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* to be all the layers in mNewChildLayers in that order and removes any
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* layers as children of the container that aren't in mNewChildLayers.
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* @param aTextContentFlags if any child layer has CONTENT_COMPONENT_ALPHA,
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* set *aTextContentFlags to CONTENT_COMPONENT_ALPHA
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*/
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void Finish(uint32_t *aTextContentFlags);
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nsRect GetChildrenBounds() { return mBounds; }
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nscoord GetAppUnitsPerDevPixel() { return mAppUnitsPerDevPixel; }
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nsIntRect ScaleToNearestPixels(const nsRect& aRect)
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{
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return aRect.ScaleToNearestPixels(mParameters.mXScale, mParameters.mYScale,
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mAppUnitsPerDevPixel);
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}
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nsIntRegion ScaleRegionToNearestPixels(const nsRegion& aRegion)
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{
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return aRegion.ScaleToNearestPixels(mParameters.mXScale, mParameters.mYScale,
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mAppUnitsPerDevPixel);
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}
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nsIntRect ScaleToOutsidePixels(const nsRect& aRect, bool aSnap)
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{
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if (aSnap && mSnappingEnabled) {
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return ScaleToNearestPixels(aRect);
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}
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return aRect.ScaleToOutsidePixels(mParameters.mXScale, mParameters.mYScale,
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mAppUnitsPerDevPixel);
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}
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nsIntRect ScaleToInsidePixels(const nsRect& aRect, bool aSnap)
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{
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if (aSnap && mSnappingEnabled) {
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return ScaleToNearestPixels(aRect);
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}
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return aRect.ScaleToInsidePixels(mParameters.mXScale, mParameters.mYScale,
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mAppUnitsPerDevPixel);
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}
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nsIntRegion ScaleRegionToInsidePixels(const nsRegion& aRegion, bool aSnap)
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{
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if (aSnap && mSnappingEnabled) {
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return ScaleRegionToNearestPixels(aRegion);
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}
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return aRegion.ScaleToInsidePixels(mParameters.mXScale, mParameters.mYScale,
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mAppUnitsPerDevPixel);
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}
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const FrameLayerBuilder::ContainerParameters& ScaleParameters() { return mParameters; };
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protected:
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/**
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* We keep a stack of these to represent the ThebesLayers 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 ThebesLayers, and to the lowest
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* ThebesLayer 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 ThebesLayerData {
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public:
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ThebesLayerData() :
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mActiveScrolledRoot(nullptr), mLayer(nullptr),
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mIsSolidColorInVisibleRegion(false),
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mNeedComponentAlpha(false),
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mForceTransparentSurface(false),
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mImage(nullptr),
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mCommonClipCount(-1) {}
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/**
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* Record that an item has been added to the ThebesLayer, 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 aDrawRect the area of the item that would be drawn if it
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* was completely visible
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* @param aOpaqueRect if non-null, the area of the item that's opaque.
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* We pass in a separate opaque rect because the opaque rect can be
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* bigger than the visible rect, and we want to have the biggest
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* opaque rect that we can.
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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 nsIntRect& aVisibleRect,
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const nsIntRect& aDrawRect,
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const FrameLayerBuilder::Clip& aClip);
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const nsIFrame* GetActiveScrolledRoot() { return mActiveScrolledRoot; }
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/**
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* If this represents only a nsDisplayImage, and the image type
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* supports being optimized to an ImageLayer (TYPE_RASTER only) returns
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* an ImageContainer for the image.
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*/
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already_AddRefed<ImageContainer> CanOptimizeImageLayer();
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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 above the layer and below the
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* next ThebesLayerData currently in the stack, if any. Note that not
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* all ThebesLayers for the container are in the ThebesLayerData stack.
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* Same coordinate system as mVisibleRegion.
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* This is a conservative approximation: it contains the true region.
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*/
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nsIntRegion mVisibleAboveRegion;
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/**
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* The region containing the bounds of all display items in the layer,
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* regardless of visbility.
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* Same coordinate system as mVisibleRegion.
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* This is a conservative approximation: it contains the true region.
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*/
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nsIntRegion mDrawRegion;
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/**
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* The region containing the bounds of all display items (regardless
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* of visibility) in the layer and below the next ThebesLayerData
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* currently in the stack, if any.
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* Note that not all ThebesLayers for the container are in the
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* ThebesLayerData stack.
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* Same coordinate system as mVisibleRegion.
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*/
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nsIntRegion mDrawAboveRegion;
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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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/**
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* The "active scrolled root" for all content in the layer. Must
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* be non-null; all content in a ThebesLayer must have the same
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* active scrolled root.
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*/
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const nsIFrame* mActiveScrolledRoot;
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ThebesLayer* mLayer;
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/**
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* If mIsSolidColorInVisibleRegion is true, this is the color of the visible
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* region.
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*/
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nscolor mSolidColor;
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/**
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* True if every pixel in mVisibleRegion will have color mSolidColor.
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*/
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bool mIsSolidColorInVisibleRegion;
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/**
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* True if there is any text visible in the layer that's over
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* transparent pixels in the layer.
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*/
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bool mNeedComponentAlpha;
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/**
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* Set if the layer should be treated as transparent, even if its entire
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* area is covered by opaque display items. For example, this needs to
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* be set if something is going to "punch holes" in the layer by clearing
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* part of its surface.
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*/
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bool mForceTransparentSurface;
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/**
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* Stores the pointer to the nsDisplayImage if we want to
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* convert this to an ImageLayer.
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*/
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nsDisplayImage* mImage;
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/**
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* Stores the clip that we need to apply to the image or, if there is no
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* image, a clip for SOME item in the layer. There is no guarantee which
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* item's clip will be stored here and mItemClip should not be used to clip
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* the whole layer - only some part of the clip should be used, as determined
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* by ThebesDisplayItemLayerUserData::GetCommonClipCount() - which may even be
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* no part at all.
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*/
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FrameLayerBuilder::Clip mItemClip;
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/**
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* The first mCommonClipCount rounded rectangle clips are identical for
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* all items in the layer.
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* -1 if there are no items in the layer; must be >=0 by the time that this
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* data is popped from the stack.
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*/
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int32_t mCommonClipCount;
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/*
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* Updates mCommonClipCount by checking for rounded rect clips in common
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* between the clip on a new item (aCurrentClip) and the common clips
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* on items already in the layer (the first mCommonClipCount rounded rects
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* in mItemClip).
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*/
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void UpdateCommonClipCount(const FrameLayerBuilder::Clip& aCurrentClip);
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};
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friend class ThebesLayerData;
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/**
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* Grab the next recyclable ThebesLayer, or create one if there are no
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* more recyclable ThebesLayers. Does any necessary invalidation of
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* a recycled ThebesLayer, and sets up the transform on the ThebesLayer
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* to account for scrolling.
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*/
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already_AddRefed<ThebesLayer> CreateOrRecycleThebesLayer(const nsIFrame* aActiveScrolledRoot, const nsIFrame *aReferenceFrame);
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/**
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* Grab the next recyclable ColorLayer, or create one if there are no
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* more recyclable ColorLayers.
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*/
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already_AddRefed<ColorLayer> CreateOrRecycleColorLayer(ThebesLayer* aThebes);
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/**
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* Grab the next recyclable ImageLayer, or create one if there are no
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* more recyclable ImageLayers.
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*/
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already_AddRefed<ImageLayer> CreateOrRecycleImageLayer(ThebesLayer* aThebes);
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/**
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* Grab a recyclable ImageLayer for use as a mask layer for aLayer (that is a
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* mask layer which has been used for aLayer before), or create one if such
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* a layer doesn't exist.
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*/
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already_AddRefed<ImageLayer> CreateOrRecycleMaskImageLayerFor(Layer* aLayer);
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/**
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* Grabs all ThebesLayers and ColorLayers from the ContainerLayer and makes them
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* available for recycling.
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*/
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void CollectOldLayers();
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/**
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* If aItem used to belong to a ThebesLayer, invalidates the area of
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* aItem in that layer. If aNewLayer is a ThebesLayer, invalidates the area of
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* aItem in that layer.
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*/
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void InvalidateForLayerChange(nsDisplayItem* aItem, Layer* aNewLayer);
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/**
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* Try to determine whether the ThebesLayer at aThebesLayerIndex
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* has a single opaque color behind it, over the entire bounds of its visible
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* region.
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* If successful, return that color, otherwise return NS_RGBA(0,0,0,0).
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*/
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nscolor FindOpaqueBackgroundColorFor(int32_t aThebesLayerIndex);
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/**
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* Indicate that we are done adding items to the ThebesLayer at the top of
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* mThebesLayerDataStack. Set the final visible region and opaque-content
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* flag, and pop it off the stack.
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*/
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void PopThebesLayerData();
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/**
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* Find the ThebesLayer to which we should assign the next display item.
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* We scan the ThebesLayerData stack to find the topmost ThebesLayer
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* that is compatible with the display item (i.e., has the same
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* active scrolled root), and that has no content from other layers above
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* it and intersecting the aVisibleRect.
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* Returns the layer, and also updates the ThebesLayerData. Will
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* push a new ThebesLayerData onto the stack if no suitable existing
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* layer is found. If we choose a ThebesLayer that's already on the
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* ThebesLayerData stack, later elements on the stack will be popped off.
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* @param aVisibleRect the area of the next display item that's visible
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* @param aActiveScrolledRoot the active scrolled root for the next
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* display item
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* @param aOpaqueRect if non-null, a region of the display item that is opaque
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* @param aSolidColor if non-null, indicates that every pixel in aVisibleRect
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* will be painted with aSolidColor by the item
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*/
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ThebesLayerData* FindThebesLayerFor(nsDisplayItem* aItem,
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const nsIntRect& aVisibleRect,
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const nsIntRect& aDrawRect,
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const FrameLayerBuilder::Clip& aClip,
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const nsIFrame* aActiveScrolledRoot);
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ThebesLayerData* GetTopThebesLayerData()
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{
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return mThebesLayerDataStack.IsEmpty() ? nullptr
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: mThebesLayerDataStack[mThebesLayerDataStack.Length() - 1].get();
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}
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/* Build a mask layer to represent the clipping region. Will return null if
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* there is no clipping specified or a mask layer cannot be built.
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* Builds an ImageLayer for the appropriate backend; the mask is relative to
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* aLayer's visible region.
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* aLayer is the layer to be clipped.
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* aRoundedRectClipCount is used when building mask layers for ThebesLayers,
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* SetupMaskLayer will build a mask layer for only the first
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* aRoundedRectClipCount rounded rects in aClip
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*/
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void SetupMaskLayer(Layer *aLayer, const FrameLayerBuilder::Clip& aClip,
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uint32_t aRoundedRectClipCount = PR_UINT32_MAX);
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nsDisplayListBuilder* mBuilder;
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LayerManager* mManager;
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FrameLayerBuilder* mLayerBuilder;
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nsIFrame* mContainerFrame;
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ContainerLayer* mContainerLayer;
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FrameLayerBuilder::ContainerParameters mParameters;
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/**
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* The region of ThebesLayers that should be invalidated every time
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* we recycle one.
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*/
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nsIntRegion mInvalidThebesContent;
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nsRect mBounds;
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nsAutoTArray<nsAutoPtr<ThebesLayerData>,1> mThebesLayerDataStack;
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/**
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* We collect the list of children in here. During ProcessDisplayItems,
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* the layers in this array either have mContainerLayer as their parent,
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* or no parent.
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*/
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typedef nsAutoTArray<nsRefPtr<Layer>,1> AutoLayersArray;
|
|
AutoLayersArray mNewChildLayers;
|
|
nsTArray<nsRefPtr<ThebesLayer> > mRecycledThebesLayers;
|
|
nsDataHashtable<nsPtrHashKey<Layer>, nsRefPtr<ImageLayer> >
|
|
mRecycledMaskImageLayers;
|
|
uint32_t mNextFreeRecycledThebesLayer;
|
|
nscoord mAppUnitsPerDevPixel;
|
|
bool mInvalidateAllThebesContent;
|
|
bool mSnappingEnabled;
|
|
};
|
|
|
|
class ThebesDisplayItemLayerUserData : public LayerUserData
|
|
{
|
|
public:
|
|
ThebesDisplayItemLayerUserData() :
|
|
mMaskClipCount(0),
|
|
mForcedBackgroundColor(NS_RGBA(0,0,0,0)),
|
|
mXScale(1.f), mYScale(1.f),
|
|
mTranslation(0, 0),
|
|
mActiveScrolledRootPosition(0, 0) {}
|
|
|
|
/**
|
|
* Record the number of clips in the Thebes layer'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 resolution scale used.
|
|
*/
|
|
float mXScale, mYScale;
|
|
|
|
/**
|
|
* The offset from the ThebesLayer's 0,0 to the
|
|
* reference frame. This isn't necessarily the same as the transform
|
|
* set on the ThebesLayer since we might also be applying an extra
|
|
* offset specified by the parent ContainerLayer/
|
|
*/
|
|
nsIntPoint mTranslation;
|
|
|
|
/**
|
|
* We try to make 0,0 of the ThebesLayer 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 ThebesLayer transform to be an integer translation, and we may
|
|
* have a resolution scale, so we have to snap the ThebesLayer transform, so
|
|
* 0,0 may not be exactly the top-left of the active scrolled root. Here we
|
|
* store the coordinates in ThebesLayer space of the top-left of the
|
|
* active scrolled root.
|
|
*/
|
|
gfxPoint mActiveScrolledRootPosition;
|
|
|
|
nsRefPtr<ColorLayer> mColorLayer;
|
|
nsRefPtr<ImageLayer> mImageLayer;
|
|
};
|
|
|
|
/*
|
|
* User data for layers which will be used as masks.
|
|
*/
|
|
struct MaskLayerUserData : public LayerUserData
|
|
{
|
|
MaskLayerUserData() : mImageKey(nullptr) {}
|
|
|
|
bool
|
|
operator== (const MaskLayerUserData& aOther) const
|
|
{
|
|
return mRoundedClipRects == aOther.mRoundedClipRects &&
|
|
mScaleX == aOther.mScaleX &&
|
|
mScaleY == aOther.mScaleY;
|
|
}
|
|
|
|
nsRefPtr<const MaskLayerImageCache::MaskLayerImageKey> mImageKey;
|
|
// properties of the mask layer; the mask layer may be re-used if these
|
|
// remain unchanged.
|
|
nsTArray<FrameLayerBuilder::Clip::RoundedRect> mRoundedClipRects;
|
|
// scale from the masked layer which is applied to the mask
|
|
float mScaleX, mScaleY;
|
|
};
|
|
|
|
/*
|
|
* User data to track the owning frame of a layer during construction.
|
|
*/
|
|
struct LayerOwnerUserData : public LayerUserData
|
|
{
|
|
LayerOwnerUserData(nsIFrame* aOwnerFrame) : mOwnerFrame(aOwnerFrame) {}
|
|
|
|
nsIFrame* mOwnerFrame;
|
|
};
|
|
|
|
/**
|
|
* The address of gThebesDisplayItemLayerUserData is used as the user
|
|
* data key for ThebesLayers created by FrameLayerBuilder.
|
|
* It identifies ThebesLayers used to draw non-layer content, which are
|
|
* therefore eligible for recycling. We want display items to be able to
|
|
* create their own dedicated ThebesLayers in BuildLayer, if necessary,
|
|
* and we wouldn't want to accidentally recycle those.
|
|
* The user data is a ThebesDisplayItemLayerUserData.
|
|
*/
|
|
uint8_t gThebesDisplayItemLayerUserData;
|
|
/**
|
|
* The address of gColorLayerUserData is used as the user
|
|
* data key for ColorLayers created by FrameLayerBuilder.
|
|
* The user data is null.
|
|
*/
|
|
uint8_t gColorLayerUserData;
|
|
/**
|
|
* The address of gImageLayerUserData is used as the user
|
|
* data key for ImageLayers created by FrameLayerBuilder.
|
|
* The user data is null.
|
|
*/
|
|
uint8_t gImageLayerUserData;
|
|
/**
|
|
* The address of gLayerManagerUserData is used as the user
|
|
* data key for retained LayerManagers managed by FrameLayerBuilder.
|
|
* The user data is a LayerManagerData.
|
|
*/
|
|
uint8_t gLayerManagerUserData;
|
|
/**
|
|
* The address of gMaskLayerUserData is used as the user
|
|
* data key for mask layers managed by FrameLayerBuilder.
|
|
* The user data is a MaskLayerUserData.
|
|
*/
|
|
uint8_t gMaskLayerUserData;
|
|
/**
|
|
* The address of gLayerOwnerUserData is used as the user
|
|
* data key for a Layer's owner frame during layer-building.
|
|
* The user data is a LayerOwnerUserData.
|
|
*/
|
|
uint8_t gLayerOwnerUserData;
|
|
|
|
/**
|
|
* 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));
|
|
}
|
|
|
|
ThebesDisplayItemLayerUserData* GetThebesDisplayItemLayerUserData(Layer* aLayer)
|
|
{
|
|
return static_cast<ThebesDisplayItemLayerUserData*>(
|
|
aLayer->GetUserData(&gThebesDisplayItemLayerUserData));
|
|
}
|
|
|
|
} // anonymous namespace
|
|
|
|
/* static */ void
|
|
FrameLayerBuilder::Shutdown()
|
|
{
|
|
if (gMaskLayerImageCache) {
|
|
delete gMaskLayerImageCache;
|
|
gMaskLayerImageCache = nullptr;
|
|
}
|
|
}
|
|
|
|
void
|
|
FrameLayerBuilder::Init(nsDisplayListBuilder* aBuilder, LayerManager* aManager)
|
|
{
|
|
mRootPresContext = aBuilder->RootReferenceFrame()->PresContext()->GetRootPresContext();
|
|
if (mRootPresContext) {
|
|
mInitialDOMGeneration = mRootPresContext->GetDOMGeneration();
|
|
}
|
|
aManager->SetUserData(&gLayerManagerLayerBuilder, new LayerManagerLayerBuilder(this));
|
|
}
|
|
|
|
bool
|
|
FrameLayerBuilder::DisplayItemDataEntry::HasNonEmptyContainerLayer()
|
|
{
|
|
if (mIsSharingContainerLayer)
|
|
return true;
|
|
for (uint32_t i = 0; i < mData.Length(); ++i) {
|
|
if (mData[i].mLayer->GetType() == Layer::TYPE_CONTAINER &&
|
|
mData[i].mLayerState != LAYER_ACTIVE_EMPTY)
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
void
|
|
FrameLayerBuilder::FlashPaint(gfxContext *aContext)
|
|
{
|
|
static bool sPaintFlashingEnabled;
|
|
static bool sPaintFlashingPrefCached = false;
|
|
|
|
if (!sPaintFlashingPrefCached) {
|
|
sPaintFlashingPrefCached = true;
|
|
mozilla::Preferences::AddBoolVarCache(&sPaintFlashingEnabled,
|
|
"nglayout.debug.paint_flashing");
|
|
}
|
|
|
|
if (sPaintFlashingEnabled) {
|
|
float r = float(rand()) / RAND_MAX;
|
|
float g = float(rand()) / RAND_MAX;
|
|
float b = float(rand()) / RAND_MAX;
|
|
aContext->SetColor(gfxRGBA(r, g, b, 0.2));
|
|
aContext->Paint();
|
|
}
|
|
}
|
|
|
|
/* static */ nsTArray<FrameLayerBuilder::DisplayItemData>*
|
|
FrameLayerBuilder::GetDisplayItemDataArrayForFrame(nsIFrame* aFrame)
|
|
{
|
|
FrameProperties props = aFrame->Properties();
|
|
LayerManagerData *data =
|
|
reinterpret_cast<LayerManagerData*>(props.Get(LayerManagerDataProperty()));
|
|
if (!data)
|
|
return nullptr;
|
|
|
|
DisplayItemDataEntry *entry = data->mFramesWithLayers.GetEntry(aFrame);
|
|
NS_ASSERTION(entry, "out of sync?");
|
|
if (!entry)
|
|
return nullptr;
|
|
|
|
return &entry->mData;
|
|
}
|
|
|
|
/* static */ void
|
|
FrameLayerBuilder::RemoveFrameFromLayerManager(nsIFrame* aFrame,
|
|
void* aPropertyValue)
|
|
{
|
|
LayerManagerData *data = reinterpret_cast<LayerManagerData*>(aPropertyValue);
|
|
data->mFramesWithLayers.RemoveEntry(aFrame);
|
|
if (data->mFramesWithLayers.Count() == 0) {
|
|
data->mLayerManager->RemoveUserData(&gLayerManagerUserData);
|
|
}
|
|
}
|
|
|
|
void
|
|
FrameLayerBuilder::DidBeginRetainedLayerTransaction(LayerManager* aManager)
|
|
{
|
|
mRetainingManager = aManager;
|
|
LayerManagerData* data = static_cast<LayerManagerData*>
|
|
(aManager->GetUserData(&gLayerManagerUserData));
|
|
if (data) {
|
|
mInvalidateAllLayers = data->mInvalidateAllLayers;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* A helper function to remove the mThebesLayerItems entries and
|
|
* layer ownership user-data for every layer in aLayer's subtree.
|
|
*/
|
|
void
|
|
FrameLayerBuilder::RemoveThebesItemsAndOwnerDataForLayerSubtree(Layer* aLayer,
|
|
bool aRemoveThebesItems,
|
|
bool aRemoveOwnerData)
|
|
{
|
|
if (aRemoveOwnerData) {
|
|
// Remove the layer owner flag so that this layer can be recovered by other
|
|
// frames in future layer tree constructions.
|
|
aLayer->RemoveUserData(&gLayerOwnerUserData);
|
|
}
|
|
|
|
ThebesLayer* thebes = aLayer->AsThebesLayer();
|
|
if (thebes) {
|
|
if (aRemoveThebesItems) {
|
|
mThebesLayerItems.RemoveEntry(thebes);
|
|
}
|
|
return;
|
|
}
|
|
|
|
for (Layer* child = aLayer->GetFirstChild(); child;
|
|
child = child->GetNextSibling()) {
|
|
RemoveThebesItemsAndOwnerDataForLayerSubtree(child, aRemoveThebesItems,
|
|
aRemoveOwnerData);
|
|
}
|
|
}
|
|
|
|
void
|
|
FrameLayerBuilder::DidEndTransaction(LayerManager* aManager)
|
|
{
|
|
Layer* root = aManager->GetRoot();
|
|
if (root) {
|
|
RemoveThebesItemsAndOwnerDataForLayerSubtree(root, aManager != mRetainingManager, true);
|
|
}
|
|
|
|
GetMaskLayerImageCache()->Sweep();
|
|
}
|
|
|
|
void
|
|
FrameLayerBuilder::WillEndTransaction(LayerManager* aManager)
|
|
{
|
|
if (aManager != mRetainingManager)
|
|
return;
|
|
|
|
// We need to save the data we'll need to support retaining. We do this
|
|
// before we paint so that invalidation triggered by painting will
|
|
// be able to update the ThebesLayerInvalidRegionProperty values
|
|
// correctly and the NS_FRAME_HAS_CONTAINER_LAYER bits will be set
|
|
// correctly.
|
|
LayerManagerData* data = static_cast<LayerManagerData*>
|
|
(mRetainingManager->GetUserData(&gLayerManagerUserData));
|
|
if (data) {
|
|
// Update all the frames that used to have layers.
|
|
data->mFramesWithLayers.EnumerateEntries(UpdateDisplayItemDataForFrame, this);
|
|
} else {
|
|
data = new LayerManagerData(mRetainingManager);
|
|
mRetainingManager->SetUserData(&gLayerManagerUserData, data);
|
|
}
|
|
// Now go through all the frames that didn't have any retained
|
|
// display items before, and record those retained display items.
|
|
// This also empties mNewDisplayItemData.
|
|
mNewDisplayItemData.EnumerateEntries(StoreNewDisplayItemData, data);
|
|
data->mInvalidateAllLayers = false;
|
|
|
|
NS_ASSERTION(data->mFramesWithLayers.Count() > 0,
|
|
"Some frame must have a layer!");
|
|
}
|
|
|
|
/**
|
|
* If *aThebesLayerInvalidRegion is non-null, use it as this frame's
|
|
* region property. Otherwise set it to the frame's region property.
|
|
*/
|
|
static void
|
|
SetHasContainerLayer(nsIFrame* aFrame, nsPoint aOffsetToRoot)
|
|
{
|
|
aFrame->AddStateBits(NS_FRAME_HAS_CONTAINER_LAYER);
|
|
for (nsIFrame* f = aFrame;
|
|
f && !(f->GetStateBits() & NS_FRAME_HAS_CONTAINER_LAYER_DESCENDANT);
|
|
f = nsLayoutUtils::GetCrossDocParentFrame(f)) {
|
|
f->AddStateBits(NS_FRAME_HAS_CONTAINER_LAYER_DESCENDANT);
|
|
}
|
|
|
|
FrameProperties props = aFrame->Properties();
|
|
nsPoint* lastPaintOffset = static_cast<nsPoint*>
|
|
(props.Get(ThebesLayerLastPaintOffsetProperty()));
|
|
if (lastPaintOffset) {
|
|
*lastPaintOffset = aOffsetToRoot;
|
|
} else {
|
|
props.Set(ThebesLayerLastPaintOffsetProperty(), new nsPoint(aOffsetToRoot));
|
|
}
|
|
}
|
|
|
|
static void
|
|
SetNoContainerLayer(nsIFrame* aFrame)
|
|
{
|
|
FrameProperties props = aFrame->Properties();
|
|
props.Delete(ThebesLayerInvalidRegionProperty());
|
|
props.Delete(ThebesLayerLastPaintOffsetProperty());
|
|
aFrame->RemoveStateBits(NS_FRAME_HAS_CONTAINER_LAYER);
|
|
}
|
|
|
|
/* static */ void
|
|
FrameLayerBuilder::SetAndClearInvalidRegion(DisplayItemDataEntry* aEntry)
|
|
{
|
|
if (aEntry->mInvalidRegion) {
|
|
nsIFrame* f = aEntry->GetKey();
|
|
FrameProperties props = f->Properties();
|
|
|
|
RefCountedRegion* invalidRegion;
|
|
aEntry->mInvalidRegion.forget(&invalidRegion);
|
|
|
|
invalidRegion->mRegion.SetEmpty();
|
|
invalidRegion->mIsInfinite = false;
|
|
props.Set(ThebesLayerInvalidRegionProperty(), invalidRegion);
|
|
}
|
|
}
|
|
|
|
/* static */ PLDHashOperator
|
|
FrameLayerBuilder::UpdateDisplayItemDataForFrame(DisplayItemDataEntry* aEntry,
|
|
void* aUserArg)
|
|
{
|
|
FrameLayerBuilder* builder = static_cast<FrameLayerBuilder*>(aUserArg);
|
|
nsIFrame* f = aEntry->GetKey();
|
|
FrameProperties props = f->Properties();
|
|
DisplayItemDataEntry* newDisplayItems =
|
|
builder ? builder->mNewDisplayItemData.GetEntry(f) : nullptr;
|
|
if (!newDisplayItems || (newDisplayItems->mData.IsEmpty() &&
|
|
!newDisplayItems->mIsSharingContainerLayer)) {
|
|
// This frame was visible, but isn't anymore.
|
|
if (newDisplayItems) {
|
|
builder->mNewDisplayItemData.RawRemoveEntry(newDisplayItems);
|
|
}
|
|
bool found;
|
|
props.Remove(LayerManagerDataProperty(), &found);
|
|
NS_ASSERTION(found, "How can the frame property be missing?");
|
|
SetNoContainerLayer(f);
|
|
return PL_DHASH_REMOVE;
|
|
}
|
|
|
|
if (!newDisplayItems->HasNonEmptyContainerLayer()) {
|
|
SetNoContainerLayer(f);
|
|
}
|
|
|
|
// Steal the list of display item layers and invalid region
|
|
aEntry->mData.SwapElements(newDisplayItems->mData);
|
|
aEntry->mInvalidRegion.swap(newDisplayItems->mInvalidRegion);
|
|
// Clear and reset the invalid region now so we can start collecting new
|
|
// dirty areas.
|
|
SetAndClearInvalidRegion(aEntry);
|
|
// Don't need to process this frame again
|
|
builder->mNewDisplayItemData.RawRemoveEntry(newDisplayItems);
|
|
return PL_DHASH_NEXT;
|
|
}
|
|
|
|
/* static */ PLDHashOperator
|
|
FrameLayerBuilder::StoreNewDisplayItemData(DisplayItemDataEntry* aEntry,
|
|
void* aUserArg)
|
|
{
|
|
LayerManagerData* data = static_cast<LayerManagerData*>(aUserArg);
|
|
nsIFrame* f = aEntry->GetKey();
|
|
FrameProperties props = f->Properties();
|
|
|
|
// Clear and reset the invalid region now so we can start collecting new
|
|
// dirty areas.
|
|
SetAndClearInvalidRegion(aEntry);
|
|
|
|
// Remember that this frame has display items in retained layers
|
|
NS_ASSERTION(!data->mFramesWithLayers.GetEntry(f),
|
|
"We shouldn't get here if we're already in mFramesWithLayers");
|
|
DisplayItemDataEntry *newEntry = data->mFramesWithLayers.PutEntry(f);
|
|
NS_ASSERTION(!props.Get(LayerManagerDataProperty()),
|
|
"mFramesWithLayers out of sync");
|
|
|
|
newEntry->mData.SwapElements(aEntry->mData);
|
|
props.Set(LayerManagerDataProperty(), data);
|
|
return PL_DHASH_REMOVE;
|
|
}
|
|
|
|
bool
|
|
FrameLayerBuilder::HasRetainedLayerFor(nsIFrame* aFrame, uint32_t aDisplayItemKey)
|
|
{
|
|
nsTArray<DisplayItemData> *array = GetDisplayItemDataArrayForFrame(aFrame);
|
|
if (!array)
|
|
return false;
|
|
|
|
for (uint32_t i = 0; i < array->Length(); ++i) {
|
|
if (array->ElementAt(i).mDisplayItemKey == aDisplayItemKey) {
|
|
Layer* layer = array->ElementAt(i).mLayer;
|
|
if (layer->Manager()->GetUserData(&gLayerManagerUserData)) {
|
|
// All layer managers with our user data are retained layer managers
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
Layer*
|
|
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;
|
|
|
|
nsTArray<DisplayItemData> *array = GetDisplayItemDataArrayForFrame(aFrame);
|
|
if (!array)
|
|
return nullptr;
|
|
|
|
for (uint32_t i = 0; i < array->Length(); ++i) {
|
|
if (array->ElementAt(i).mDisplayItemKey == aDisplayItemKey) {
|
|
Layer* layer = array->ElementAt(i).mLayer;
|
|
if (layer->Manager() == mRetainingManager) {
|
|
LayerOwnerUserData* layerOwner = static_cast<LayerOwnerUserData*>
|
|
(layer->GetUserData(&gLayerOwnerUserData));
|
|
if (!layerOwner || layerOwner->mOwnerFrame == aFrame) {
|
|
return layer;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
Layer*
|
|
FrameLayerBuilder::GetOldLayerFor(nsDisplayItem* aItem)
|
|
{
|
|
uint32_t key = aItem->GetPerFrameKey();
|
|
nsIFrame* frame = aItem->GetUnderlyingFrame();
|
|
|
|
if (frame) {
|
|
Layer* oldLayer = GetOldLayerForFrame(frame, key);
|
|
if (oldLayer) {
|
|
return oldLayer;
|
|
}
|
|
}
|
|
|
|
nsAutoTArray<nsIFrame*,4> mergedFrames;
|
|
aItem->GetMergedFrames(&mergedFrames);
|
|
for (uint32_t i = 0; i < mergedFrames.Length(); ++i) {
|
|
Layer* oldLayer = GetOldLayerForFrame(mergedFrames[i], key);
|
|
if (oldLayer) {
|
|
return oldLayer;
|
|
}
|
|
}
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
/* static */ Layer*
|
|
FrameLayerBuilder::GetDebugOldLayerFor(nsIFrame* aFrame, uint32_t aDisplayItemKey)
|
|
{
|
|
FrameProperties props = aFrame->Properties();
|
|
LayerManagerData* data = static_cast<LayerManagerData*>(props.Get(LayerManagerDataProperty()));
|
|
if (!data) {
|
|
return nullptr;
|
|
}
|
|
DisplayItemDataEntry *entry = data->mFramesWithLayers.GetEntry(aFrame);
|
|
if (!entry)
|
|
return nullptr;
|
|
|
|
nsTArray<DisplayItemData> *array = &entry->mData;
|
|
if (!array)
|
|
return nullptr;
|
|
|
|
for (uint32_t i = 0; i < array->Length(); ++i) {
|
|
if (array->ElementAt(i).mDisplayItemKey == aDisplayItemKey) {
|
|
return array->ElementAt(i).mLayer;
|
|
}
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
/**
|
|
* 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(ThebesLayer* 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 ThebesLayer's own coordinates
|
|
nsIntRegion rgn = aRegion;
|
|
rgn.MoveBy(-aTranslation);
|
|
aLayer->InvalidateRegion(rgn);
|
|
}
|
|
|
|
already_AddRefed<ColorLayer>
|
|
ContainerState::CreateOrRecycleColorLayer(ThebesLayer *aThebes)
|
|
{
|
|
ThebesDisplayItemLayerUserData* data =
|
|
static_cast<ThebesDisplayItemLayerUserData*>(aThebes->GetUserData(&gThebesDisplayItemLayerUserData));
|
|
nsRefPtr<ColorLayer> layer = data->mColorLayer;
|
|
if (layer) {
|
|
layer->SetClipRect(nullptr);
|
|
layer->SetMaskLayer(nullptr);
|
|
} else {
|
|
// Create a new layer
|
|
layer = mManager->CreateColorLayer();
|
|
if (!layer)
|
|
return nullptr;
|
|
// Mark this layer as being used for Thebes-painting display items
|
|
data->mColorLayer = layer;
|
|
layer->SetUserData(&gColorLayerUserData, nullptr);
|
|
|
|
// Remove other layer types we might have stored for this ThebesLayer
|
|
data->mImageLayer = nullptr;
|
|
}
|
|
return layer.forget();
|
|
}
|
|
|
|
already_AddRefed<ImageLayer>
|
|
ContainerState::CreateOrRecycleImageLayer(ThebesLayer *aThebes)
|
|
{
|
|
ThebesDisplayItemLayerUserData* data =
|
|
static_cast<ThebesDisplayItemLayerUserData*>(aThebes->GetUserData(&gThebesDisplayItemLayerUserData));
|
|
nsRefPtr<ImageLayer> layer = data->mImageLayer;
|
|
if (layer) {
|
|
layer->SetClipRect(nullptr);
|
|
layer->SetMaskLayer(nullptr);
|
|
} else {
|
|
// Create a new layer
|
|
layer = mManager->CreateImageLayer();
|
|
if (!layer)
|
|
return nullptr;
|
|
// Mark this layer as being used for Thebes-painting display items
|
|
data->mImageLayer = layer;
|
|
layer->SetUserData(&gImageLayerUserData, nullptr);
|
|
|
|
// Remove other layer types we might have stored for this ThebesLayer
|
|
data->mColorLayer = nullptr;
|
|
}
|
|
return layer.forget();
|
|
}
|
|
|
|
already_AddRefed<ImageLayer>
|
|
ContainerState::CreateOrRecycleMaskImageLayerFor(Layer* aLayer)
|
|
{
|
|
nsRefPtr<ImageLayer> result = mRecycledMaskImageLayers.Get(aLayer);
|
|
if (result) {
|
|
mRecycledMaskImageLayers.Remove(aLayer);
|
|
// 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->SetForceSingleTile(true);
|
|
}
|
|
|
|
return result.forget();
|
|
}
|
|
|
|
static nsIntPoint
|
|
GetTranslationForThebesLayer(ThebesLayer* aLayer)
|
|
{
|
|
ThebesDisplayItemLayerUserData* data =
|
|
static_cast<ThebesDisplayItemLayerUserData*>
|
|
(aLayer->GetUserData(&gThebesDisplayItemLayerUserData));
|
|
NS_ASSERTION(data, "Must be a tracked thebes layer!");
|
|
|
|
return data->mTranslation;
|
|
}
|
|
|
|
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(const nsIFrame* aActiveScrolledRoot)
|
|
{
|
|
nsIScrollableFrame* sf = nsLayoutUtils::GetScrollableFrameFor(aActiveScrolledRoot);
|
|
if (sf) {
|
|
sf->ResetScrollPositionForLayerPixelAlignment();
|
|
}
|
|
}
|
|
|
|
static void
|
|
InvalidateEntireThebesLayer(ThebesLayer* aLayer, const nsIFrame* aActiveScrolledRoot)
|
|
{
|
|
nsIntRect invalidate = aLayer->GetValidRegion().GetBounds();
|
|
aLayer->InvalidateRegion(invalidate);
|
|
ResetScrollPositionForLayerPixelAlignment(aActiveScrolledRoot);
|
|
}
|
|
|
|
already_AddRefed<ThebesLayer>
|
|
ContainerState::CreateOrRecycleThebesLayer(const nsIFrame* aActiveScrolledRoot, const nsIFrame* aReferenceFrame)
|
|
{
|
|
// We need a new thebes layer
|
|
nsRefPtr<ThebesLayer> layer;
|
|
ThebesDisplayItemLayerUserData* data;
|
|
bool didResetScrollPositionForLayerPixelAlignment = false;
|
|
if (mNextFreeRecycledThebesLayer < mRecycledThebesLayers.Length()) {
|
|
// Recycle a layer
|
|
layer = mRecycledThebesLayers[mNextFreeRecycledThebesLayer];
|
|
++mNextFreeRecycledThebesLayer;
|
|
// Clear clip rect and mask layer so we don't accidentally stay clipped.
|
|
// We will reapply any necessary clipping.
|
|
layer->SetClipRect(nullptr);
|
|
layer->SetMaskLayer(nullptr);
|
|
|
|
data = static_cast<ThebesDisplayItemLayerUserData*>
|
|
(layer->GetUserData(&gThebesDisplayItemLayerUserData));
|
|
NS_ASSERTION(data, "Recycled ThebesLayers must have user data");
|
|
|
|
// This gets called on recycled ThebesLayers 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 ThebesLayer 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 ThebesLayer to its new
|
|
// transform. See nsGfxScrollFrame::InvalidateInternal, where
|
|
// we ensure that mInvalidThebesContent is updated according to the
|
|
// scroll position as of the most recent paint.
|
|
if (mInvalidateAllThebesContent ||
|
|
data->mXScale != mParameters.mXScale ||
|
|
data->mYScale != mParameters.mYScale) {
|
|
InvalidateEntireThebesLayer(layer, aActiveScrolledRoot);
|
|
didResetScrollPositionForLayerPixelAlignment = true;
|
|
} else {
|
|
nsIntRect bounds = mInvalidThebesContent.GetBounds();
|
|
if (!bounds.IsEmpty()) {
|
|
InvalidatePostTransformRegion(layer, mInvalidThebesContent,
|
|
GetTranslationForThebesLayer(layer));
|
|
}
|
|
}
|
|
// We do not need to Invalidate these areas in the widget because we
|
|
// assume the caller of InvalidateThebesLayerContents has ensured
|
|
// the area is invalidated in the widget.
|
|
} else {
|
|
// Create a new thebes layer
|
|
layer = mManager->CreateThebesLayer();
|
|
if (!layer)
|
|
return nullptr;
|
|
// Mark this layer as being used for Thebes-painting display items
|
|
data = new ThebesDisplayItemLayerUserData();
|
|
layer->SetUserData(&gThebesDisplayItemLayerUserData, data);
|
|
ResetScrollPositionForLayerPixelAlignment(aActiveScrolledRoot);
|
|
didResetScrollPositionForLayerPixelAlignment = true;
|
|
}
|
|
data->mXScale = mParameters.mXScale;
|
|
data->mYScale = mParameters.mYScale;
|
|
layer->SetAllowResidualTranslation(mParameters.AllowResidualTranslation());
|
|
|
|
mLayerBuilder->SaveLastPaintOffset(layer);
|
|
|
|
// Set up transform so that 0,0 in the Thebes layer corresponds to the
|
|
// (pixel-snapped) top-left of the aActiveScrolledRoot.
|
|
nsPoint offset = aActiveScrolledRoot->GetOffsetToCrossDoc(aReferenceFrame);
|
|
nscoord appUnitsPerDevPixel = aActiveScrolledRoot->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 data->mActiveScrolledRootPosition if possible.
|
|
nsIntPoint pixOffset(RoundToMatchResidual(scaledOffset.x, data->mActiveScrolledRootPosition.x),
|
|
RoundToMatchResidual(scaledOffset.y, data->mActiveScrolledRootPosition.y));
|
|
data->mTranslation = pixOffset;
|
|
pixOffset += mParameters.mOffset;
|
|
gfxMatrix matrix;
|
|
matrix.Translate(gfxPoint(pixOffset.x, pixOffset.y));
|
|
layer->SetBaseTransform(gfx3DMatrix::From2D(matrix));
|
|
|
|
// FIXME: Temporary workaround for bug 681192 and bug 724786.
|
|
#ifndef MOZ_JAVA_COMPOSITOR
|
|
// 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 activeScrolledRootTopLeft = scaledOffset - matrix.GetTranslation();
|
|
// 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 (!activeScrolledRootTopLeft.WithinEpsilonOf(data->mActiveScrolledRootPosition, SUBPIXEL_OFFSET_EPSILON)) {
|
|
data->mActiveScrolledRootPosition = activeScrolledRootTopLeft;
|
|
InvalidateEntireThebesLayer(layer, aActiveScrolledRoot);
|
|
} else if (didResetScrollPositionForLayerPixelAlignment) {
|
|
data->mActiveScrolledRootPosition = activeScrolledRootTopLeft;
|
|
}
|
|
#endif
|
|
|
|
return layer.forget();
|
|
}
|
|
|
|
/**
|
|
* Returns the appunits per dev pixel for the item's frame. The item must
|
|
* have a frame because only nsDisplayClip items don't have a frame,
|
|
* and those items are flattened away by ProcessDisplayItems.
|
|
*/
|
|
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->GetUnderlyingFrame()->PresContext()->AppUnitsPerDevPixel();
|
|
}
|
|
|
|
/**
|
|
* Restrict the visible region of aLayer to the region that is actually visible.
|
|
* Because we only reduce the visible region here, we don't need to worry
|
|
* about whether CONTENT_OPAQUE is set; if layer was opauqe in the old
|
|
* visible region, it will still be opaque in the new one.
|
|
* @param aItemVisible the visible region of the display item (that is,
|
|
* after any layer transform has been applied)
|
|
*/
|
|
static void
|
|
RestrictVisibleRegionForLayer(Layer* aLayer, const nsIntRect& aItemVisible)
|
|
{
|
|
gfx3DMatrix transform = aLayer->GetTransform();
|
|
|
|
// if 'transform' is not invertible, then nothing will be displayed
|
|
// for the layer, so it doesn't really matter what we do here
|
|
gfxRect itemVisible(aItemVisible.x, aItemVisible.y, aItemVisible.width, aItemVisible.height);
|
|
gfxRect layerVisible = transform.Inverse().ProjectRectBounds(itemVisible);
|
|
layerVisible.RoundOut();
|
|
|
|
nsIntRect visibleRect;
|
|
if (!gfxUtils::GfxRectToIntRect(layerVisible, &visibleRect))
|
|
return;
|
|
|
|
nsIntRegion rgn = aLayer->GetVisibleRegion();
|
|
if (!visibleRect.Contains(rgn.GetBounds())) {
|
|
rgn.And(rgn, visibleRect);
|
|
aLayer->SetVisibleRegion(rgn);
|
|
}
|
|
}
|
|
|
|
nscolor
|
|
ContainerState::FindOpaqueBackgroundColorFor(int32_t aThebesLayerIndex)
|
|
{
|
|
ThebesLayerData* target = mThebesLayerDataStack[aThebesLayerIndex];
|
|
for (int32_t i = aThebesLayerIndex - 1; i >= 0; --i) {
|
|
ThebesLayerData* candidate = mThebesLayerDataStack[i];
|
|
nsIntRegion visibleAboveIntersection;
|
|
visibleAboveIntersection.And(candidate->mVisibleAboveRegion, target->mVisibleRegion);
|
|
if (!visibleAboveIntersection.IsEmpty()) {
|
|
// Some non-Thebes content between target and candidate; this is
|
|
// hopeless
|
|
break;
|
|
}
|
|
|
|
nsIntRegion intersection;
|
|
intersection.And(candidate->mVisibleRegion, target->mVisibleRegion);
|
|
if (intersection.IsEmpty()) {
|
|
// The layer doesn't intersect our target, ignore it and move on
|
|
continue;
|
|
}
|
|
|
|
// The candidate intersects our target. If any layer has a solid-color
|
|
// area behind our target, this must be it. Scan its display items.
|
|
nsRect rect =
|
|
target->mVisibleRegion.GetBounds().ToAppUnits(mAppUnitsPerDevPixel);
|
|
rect.ScaleInverseRoundOut(mParameters.mXScale, mParameters.mYScale);
|
|
return mLayerBuilder->
|
|
FindOpaqueColorCovering(mBuilder, candidate->mLayer, rect);
|
|
}
|
|
return NS_RGBA(0,0,0,0);
|
|
}
|
|
|
|
void
|
|
ContainerState::ThebesLayerData::UpdateCommonClipCount(
|
|
const FrameLayerBuilder::Clip& aCurrentClip)
|
|
{
|
|
if (mCommonClipCount >= 0) {
|
|
int32_t end = NS_MIN<int32_t>(aCurrentClip.mRoundedClipRects.Length(),
|
|
mCommonClipCount);
|
|
int32_t clipCount = 0;
|
|
for (; clipCount < end; ++clipCount) {
|
|
if (mItemClip.mRoundedClipRects[clipCount] !=
|
|
aCurrentClip.mRoundedClipRects[clipCount]) {
|
|
break;
|
|
}
|
|
}
|
|
mCommonClipCount = clipCount;
|
|
NS_ASSERTION(mItemClip.mRoundedClipRects.Length() >= uint32_t(mCommonClipCount),
|
|
"Inconsistent common clip count.");
|
|
} else {
|
|
// first item in the layer
|
|
mCommonClipCount = aCurrentClip.mRoundedClipRects.Length();
|
|
}
|
|
}
|
|
|
|
already_AddRefed<ImageContainer>
|
|
ContainerState::ThebesLayerData::CanOptimizeImageLayer()
|
|
{
|
|
if (!mImage) {
|
|
return nullptr;
|
|
}
|
|
|
|
return mImage->GetContainer();
|
|
}
|
|
|
|
void
|
|
ContainerState::PopThebesLayerData()
|
|
{
|
|
NS_ASSERTION(!mThebesLayerDataStack.IsEmpty(), "Can't pop");
|
|
|
|
int32_t lastIndex = mThebesLayerDataStack.Length() - 1;
|
|
ThebesLayerData* data = mThebesLayerDataStack[lastIndex];
|
|
|
|
nsRefPtr<Layer> layer;
|
|
nsRefPtr<ImageContainer> imageContainer = data->CanOptimizeImageLayer();
|
|
|
|
if ((data->mIsSolidColorInVisibleRegion || imageContainer) &&
|
|
data->mLayer->GetValidRegion().IsEmpty()) {
|
|
NS_ASSERTION(!(data->mIsSolidColorInVisibleRegion && imageContainer),
|
|
"Can't be a solid color as well as an image!");
|
|
if (imageContainer) {
|
|
nsRefPtr<ImageLayer> imageLayer = CreateOrRecycleImageLayer(data->mLayer);
|
|
imageLayer->SetContainer(imageContainer);
|
|
data->mImage->ConfigureLayer(imageLayer, mParameters.mOffset);
|
|
imageLayer->SetPostScale(mParameters.mXScale,
|
|
mParameters.mYScale);
|
|
if (data->mItemClip.mHaveClipRect) {
|
|
nsIntRect clip = ScaleToNearestPixels(data->mItemClip.mClipRect);
|
|
clip.MoveBy(mParameters.mOffset);
|
|
imageLayer->IntersectClipRect(clip);
|
|
}
|
|
layer = imageLayer;
|
|
} else {
|
|
nsRefPtr<ColorLayer> colorLayer = CreateOrRecycleColorLayer(data->mLayer);
|
|
colorLayer->SetIsFixedPosition(data->mLayer->GetIsFixedPosition());
|
|
colorLayer->SetColor(data->mSolidColor);
|
|
|
|
// Copy transform
|
|
colorLayer->SetBaseTransform(data->mLayer->GetBaseTransform());
|
|
colorLayer->SetPostScale(data->mLayer->GetPostXScale(), data->mLayer->GetPostYScale());
|
|
|
|
// Clip colorLayer to its visible region, since ColorLayers are
|
|
// allowed to paint outside the visible region. Here we rely on the
|
|
// fact that uniform display items fill rectangles; obviously the
|
|
// area to fill must contain the visible region, and because it's
|
|
// a rectangle, it must therefore contain the visible region's GetBounds.
|
|
// Note that the visible region is already clipped appropriately.
|
|
nsIntRect visibleRect = data->mVisibleRegion.GetBounds();
|
|
visibleRect.MoveBy(mParameters.mOffset);
|
|
colorLayer->SetClipRect(&visibleRect);
|
|
|
|
layer = colorLayer;
|
|
}
|
|
|
|
NS_ASSERTION(!mNewChildLayers.Contains(layer), "Layer already in list???");
|
|
AutoLayersArray::index_type index = mNewChildLayers.IndexOf(data->mLayer);
|
|
NS_ASSERTION(index != AutoLayersArray::NoIndex, "Thebes layer not found?");
|
|
mNewChildLayers.InsertElementAt(index + 1, layer);
|
|
|
|
// Hide the ThebesLayer. We leave it in the layer tree so that we
|
|
// can find and recycle it later.
|
|
data->mLayer->IntersectClipRect(nsIntRect());
|
|
data->mLayer->SetVisibleRegion(nsIntRegion());
|
|
} else {
|
|
layer = data->mLayer;
|
|
imageContainer = nullptr;
|
|
}
|
|
|
|
gfxMatrix transform;
|
|
if (!layer->GetTransform().Is2D(&transform)) {
|
|
NS_ERROR("Only 2D transformations currently supported");
|
|
}
|
|
|
|
// ImageLayers are already configured with a visible region
|
|
if (!imageContainer) {
|
|
NS_ASSERTION(!transform.HasNonIntegerTranslation(),
|
|
"Matrix not just an integer translation?");
|
|
// Convert from relative to the container to relative to the
|
|
// ThebesLayer itself.
|
|
nsIntRegion rgn = data->mVisibleRegion;
|
|
rgn.MoveBy(-GetTranslationForThebesLayer(data->mLayer));
|
|
layer->SetVisibleRegion(rgn);
|
|
}
|
|
|
|
nsIntRegion transparentRegion;
|
|
transparentRegion.Sub(data->mVisibleRegion, data->mOpaqueRegion);
|
|
bool isOpaque = transparentRegion.IsEmpty();
|
|
// For translucent ThebesLayers, 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 = FindOpaqueBackgroundColorFor(lastIndex);
|
|
if (NS_GET_A(backgroundColor) == 255) {
|
|
isOpaque = true;
|
|
}
|
|
}
|
|
|
|
// Store the background color
|
|
ThebesDisplayItemLayerUserData* userData =
|
|
GetThebesDisplayItemLayerUserData(data->mLayer);
|
|
NS_ASSERTION(userData, "where did our user data go?");
|
|
if (userData->mForcedBackgroundColor != backgroundColor) {
|
|
// Invalidate the entire target ThebesLayer since we're changing
|
|
// the background color
|
|
data->mLayer->InvalidateRegion(data->mLayer->GetValidRegion());
|
|
}
|
|
userData->mForcedBackgroundColor = backgroundColor;
|
|
|
|
// use a mask layer for rounded rect clipping
|
|
int32_t commonClipCount = data->mCommonClipCount;
|
|
NS_ASSERTION(commonClipCount >= 0, "Inconsistent clip count.");
|
|
SetupMaskLayer(layer, data->mItemClip, commonClipCount);
|
|
// copy commonClipCount to the entry
|
|
FrameLayerBuilder::ThebesLayerItemsEntry* entry = mLayerBuilder->
|
|
GetThebesLayerItemsEntry(static_cast<ThebesLayer*>(layer.get()));
|
|
entry->mCommonClipCount = commonClipCount;
|
|
} else {
|
|
// mask layer for image and color layers
|
|
SetupMaskLayer(layer, data->mItemClip);
|
|
}
|
|
uint32_t flags;
|
|
if (isOpaque && !data->mForceTransparentSurface) {
|
|
flags = Layer::CONTENT_OPAQUE;
|
|
} else if (data->mNeedComponentAlpha) {
|
|
flags = Layer::CONTENT_COMPONENT_ALPHA;
|
|
} else {
|
|
flags = 0;
|
|
}
|
|
layer->SetContentFlags(flags);
|
|
|
|
if (lastIndex > 0) {
|
|
// Since we're going to pop off the last ThebesLayerData, the
|
|
// mVisibleAboveRegion of the second-to-last item will need to include
|
|
// the regions of the last item.
|
|
ThebesLayerData* nextData = mThebesLayerDataStack[lastIndex - 1];
|
|
nextData->mVisibleAboveRegion.Or(nextData->mVisibleAboveRegion,
|
|
data->mVisibleAboveRegion);
|
|
nextData->mVisibleAboveRegion.Or(nextData->mVisibleAboveRegion,
|
|
data->mVisibleRegion);
|
|
nextData->mVisibleAboveRegion.SimplifyOutward(4);
|
|
nextData->mDrawAboveRegion.Or(nextData->mDrawAboveRegion,
|
|
data->mDrawAboveRegion);
|
|
nextData->mDrawAboveRegion.Or(nextData->mDrawAboveRegion,
|
|
data->mDrawRegion);
|
|
nextData->mDrawAboveRegion.SimplifyOutward(4);
|
|
}
|
|
|
|
mThebesLayerDataStack.RemoveElementAt(lastIndex);
|
|
}
|
|
|
|
static bool
|
|
SuppressComponentAlpha(nsDisplayListBuilder* aBuilder,
|
|
nsDisplayItem* aItem,
|
|
const nsRect& aComponentAlphaBounds)
|
|
{
|
|
const nsRegion* windowTransparentRegion = aBuilder->GetFinalTransparentRegion();
|
|
if (!windowTransparentRegion || windowTransparentRegion->IsEmpty())
|
|
return false;
|
|
|
|
// Suppress component alpha for items in the toplevel window that are over
|
|
// the window translucent area
|
|
nsIFrame* f = aItem->GetUnderlyingFrame();
|
|
nsIFrame* ref = aBuilder->RootReferenceFrame();
|
|
if (f->PresContext() != ref->PresContext())
|
|
return false;
|
|
|
|
for (nsIFrame* t = f; t; t = t->GetParent()) {
|
|
if (t->IsTransformed())
|
|
return false;
|
|
}
|
|
|
|
return windowTransparentRegion->Intersects(aComponentAlphaBounds);
|
|
}
|
|
|
|
static bool
|
|
WindowHasTransparency(nsDisplayListBuilder* aBuilder)
|
|
{
|
|
const nsRegion* windowTransparentRegion = aBuilder->GetFinalTransparentRegion();
|
|
return windowTransparentRegion && !windowTransparentRegion->IsEmpty();
|
|
}
|
|
|
|
void
|
|
ContainerState::ThebesLayerData::Accumulate(ContainerState* aState,
|
|
nsDisplayItem* aItem,
|
|
const nsIntRect& aVisibleRect,
|
|
const nsIntRect& aDrawRect,
|
|
const FrameLayerBuilder::Clip& aClip)
|
|
{
|
|
if (aState->mBuilder->NeedToForceTransparentSurfaceForItem(aItem)) {
|
|
mForceTransparentSurface = true;
|
|
}
|
|
if (aState->mParameters.mDisableSubpixelAntialiasingInDescendants) {
|
|
// Disable component alpha.
|
|
// Note that the transform (if any) on the ThebesLayer is always an integer translation so
|
|
// we don't have to factor that in here.
|
|
aItem->DisableComponentAlpha();
|
|
}
|
|
|
|
/* Mark as available for conversion to image layer if this is a nsDisplayImage and
|
|
* we are the first visible item in the ThebesLayerData object.
|
|
*/
|
|
if (mVisibleRegion.IsEmpty() && aItem->GetType() == nsDisplayItem::TYPE_IMAGE) {
|
|
mImage = static_cast<nsDisplayImage*>(aItem);
|
|
} else {
|
|
mImage = nullptr;
|
|
}
|
|
mItemClip = aClip;
|
|
|
|
if (!mIsSolidColorInVisibleRegion && mOpaqueRegion.Contains(aDrawRect) &&
|
|
mVisibleRegion.Contains(aVisibleRect)) {
|
|
// A very common case! Most pages have a ThebesLayer 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, mOpaqueRegion
|
|
// and mDrawRegion don't need updating. mVisibleRegion contains aVisibleRect
|
|
// already, mOpaqueRegion contains aDrawRect and therefore whatever
|
|
// the opaque region of the item is. mDrawRegion must contain mOpaqueRegion
|
|
// and therefore aDrawRect.
|
|
NS_ASSERTION(mDrawRegion.Contains(aDrawRect), "Draw region not covered");
|
|
return;
|
|
}
|
|
|
|
nscolor uniformColor;
|
|
bool isUniform = aItem->IsUniform(aState->mBuilder, &uniformColor);
|
|
|
|
// 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 (!isUniform || 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 (isUniform) {
|
|
bool snap;
|
|
nsRect bounds = aItem->GetBounds(aState->mBuilder, &snap);
|
|
if (!aState->ScaleToInsidePixels(bounds, snap).Contains(aVisibleRect)) {
|
|
isUniform = false;
|
|
}
|
|
}
|
|
if (isUniform && aClip.mRoundedClipRects.IsEmpty()) {
|
|
if (mVisibleRegion.IsEmpty()) {
|
|
// This color is all we have
|
|
mSolidColor = uniformColor;
|
|
mIsSolidColorInVisibleRegion = true;
|
|
} else if (mIsSolidColorInVisibleRegion &&
|
|
mVisibleRegion.IsEqual(nsIntRegion(aVisibleRect))) {
|
|
// we can just blend the colors together
|
|
mSolidColor = NS_ComposeColors(mSolidColor, uniformColor);
|
|
} else {
|
|
mIsSolidColorInVisibleRegion = false;
|
|
}
|
|
} else {
|
|
mIsSolidColorInVisibleRegion = false;
|
|
}
|
|
|
|
mVisibleRegion.Or(mVisibleRegion, aVisibleRect);
|
|
mVisibleRegion.SimplifyOutward(4);
|
|
mDrawRegion.Or(mDrawRegion, aDrawRect);
|
|
mDrawRegion.SimplifyOutward(4);
|
|
}
|
|
|
|
bool snap;
|
|
nsRegion opaque = aItem->GetOpaqueRegion(aState->mBuilder, &snap);
|
|
if (!opaque.IsEmpty()) {
|
|
nsRegion opaqueClipped;
|
|
nsRegionRectIterator iter(opaque);
|
|
for (const nsRect* r = iter.Next(); r; r = iter.Next()) {
|
|
opaqueClipped.Or(opaqueClipped, aClip.ApproximateIntersect(*r));
|
|
}
|
|
|
|
nsIntRegion opaquePixels = aState->ScaleRegionToInsidePixels(opaqueClipped, snap);
|
|
|
|
nsIntRegionRectIterator iter2(opaquePixels);
|
|
for (const nsIntRect* r = iter2.Next(); r; r = iter2.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, *r);
|
|
// 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 ||
|
|
(WindowHasTransparency(aState->mBuilder) &&
|
|
aItem->GetUnderlyingFrame()->PresContext()->IsChrome())) {
|
|
mOpaqueRegion = 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 (SuppressComponentAlpha(aState->mBuilder, aItem, componentAlpha)) {
|
|
aItem->DisableComponentAlpha();
|
|
} else {
|
|
mNeedComponentAlpha = true;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
ContainerState::ThebesLayerData*
|
|
ContainerState::FindThebesLayerFor(nsDisplayItem* aItem,
|
|
const nsIntRect& aVisibleRect,
|
|
const nsIntRect& aDrawRect,
|
|
const FrameLayerBuilder::Clip& aClip,
|
|
const nsIFrame* aActiveScrolledRoot)
|
|
{
|
|
int32_t i;
|
|
int32_t lowestUsableLayerWithScrolledRoot = -1;
|
|
int32_t topmostLayerWithScrolledRoot = -1;
|
|
for (i = mThebesLayerDataStack.Length() - 1; i >= 0; --i) {
|
|
ThebesLayerData* data = mThebesLayerDataStack[i];
|
|
if (data->mDrawAboveRegion.Intersects(aVisibleRect)) {
|
|
++i;
|
|
break;
|
|
}
|
|
if (data->mActiveScrolledRoot == aActiveScrolledRoot) {
|
|
lowestUsableLayerWithScrolledRoot = i;
|
|
if (topmostLayerWithScrolledRoot < 0) {
|
|
topmostLayerWithScrolledRoot = i;
|
|
}
|
|
}
|
|
if (data->mDrawRegion.Intersects(aVisibleRect))
|
|
break;
|
|
}
|
|
if (topmostLayerWithScrolledRoot < 0) {
|
|
--i;
|
|
for (; i >= 0; --i) {
|
|
ThebesLayerData* data = mThebesLayerDataStack[i];
|
|
if (data->mActiveScrolledRoot == aActiveScrolledRoot) {
|
|
topmostLayerWithScrolledRoot = i;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (topmostLayerWithScrolledRoot >= 0) {
|
|
while (uint32_t(topmostLayerWithScrolledRoot + 1) < mThebesLayerDataStack.Length()) {
|
|
PopThebesLayerData();
|
|
}
|
|
}
|
|
|
|
nsRefPtr<ThebesLayer> layer;
|
|
ThebesLayerData* thebesLayerData = nullptr;
|
|
if (lowestUsableLayerWithScrolledRoot < 0) {
|
|
layer = CreateOrRecycleThebesLayer(aActiveScrolledRoot, aItem->ReferenceFrame());
|
|
|
|
NS_ASSERTION(!mNewChildLayers.Contains(layer), "Layer already in list???");
|
|
mNewChildLayers.AppendElement(layer);
|
|
|
|
thebesLayerData = new ThebesLayerData();
|
|
mThebesLayerDataStack.AppendElement(thebesLayerData);
|
|
thebesLayerData->mLayer = layer;
|
|
thebesLayerData->mActiveScrolledRoot = aActiveScrolledRoot;
|
|
} else {
|
|
thebesLayerData = mThebesLayerDataStack[lowestUsableLayerWithScrolledRoot];
|
|
layer = thebesLayerData->mLayer;
|
|
}
|
|
|
|
// check to see if the new item has rounded rect clips in common with
|
|
// other items in the layer
|
|
thebesLayerData->UpdateCommonClipCount(aClip);
|
|
|
|
thebesLayerData->Accumulate(this, aItem, aVisibleRect, aDrawRect, aClip);
|
|
|
|
return thebesLayerData;
|
|
}
|
|
|
|
#ifdef MOZ_DUMP_PAINTING
|
|
static void
|
|
DumpPaintedImage(nsDisplayItem* aItem, gfxASurface* aSurf)
|
|
{
|
|
nsCString string(aItem->Name());
|
|
string.Append("-");
|
|
string.AppendInt((uint64_t)aItem);
|
|
fprintf(gfxUtils::sDumpPaintFile, "array[\"%s\"]=\"", string.BeginReading());
|
|
aSurf->DumpAsDataURL(gfxUtils::sDumpPaintFile);
|
|
fprintf(gfxUtils::sDumpPaintFile, "\";");
|
|
}
|
|
#endif
|
|
|
|
static void
|
|
PaintInactiveLayer(nsDisplayListBuilder* aBuilder,
|
|
nsDisplayItem* aItem,
|
|
gfxContext* aContext,
|
|
nsRenderingContext* aCtx,
|
|
FrameLayerBuilder *aLayerBuilder)
|
|
{
|
|
// This item has an inactive layer. Render it to a ThebesLayer
|
|
// using a temporary BasicLayerManager.
|
|
int32_t appUnitsPerDevPixel = AppUnitsPerDevPixel(aItem);
|
|
nsIntRect itemVisibleRect =
|
|
aItem->GetVisibleRect().ToOutsidePixels(appUnitsPerDevPixel);
|
|
|
|
nsRefPtr<gfxContext> context = aContext;
|
|
#ifdef MOZ_DUMP_PAINTING
|
|
nsRefPtr<gfxASurface> surf;
|
|
if (gfxUtils::sDumpPainting) {
|
|
surf = gfxPlatform::GetPlatform()->CreateOffscreenSurface(itemVisibleRect.Size(),
|
|
gfxASurface::CONTENT_COLOR_ALPHA);
|
|
surf->SetDeviceOffset(-itemVisibleRect.TopLeft());
|
|
context = new gfxContext(surf);
|
|
}
|
|
#endif
|
|
|
|
nsRefPtr<BasicLayerManager> tempManager = new BasicLayerManager();
|
|
tempManager->SetUserData(&gLayerManagerLayerBuilder, new LayerManagerLayerBuilder(aLayerBuilder, false));
|
|
tempManager->BeginTransactionWithTarget(context);
|
|
nsRefPtr<Layer> layer =
|
|
aItem->BuildLayer(aBuilder, tempManager, FrameLayerBuilder::ContainerParameters());
|
|
if (!layer) {
|
|
tempManager->EndTransaction(nullptr, nullptr);
|
|
return;
|
|
}
|
|
RestrictVisibleRegionForLayer(layer, itemVisibleRect);
|
|
|
|
tempManager->SetRoot(layer);
|
|
aLayerBuilder->WillEndTransaction(tempManager);
|
|
if (aItem->GetType() == nsDisplayItem::TYPE_SVG_EFFECTS) {
|
|
static_cast<nsDisplaySVGEffects*>(aItem)->PaintAsLayer(aBuilder, aCtx, tempManager);
|
|
if (tempManager->InTransaction()) {
|
|
tempManager->AbortTransaction();
|
|
}
|
|
} else {
|
|
tempManager->EndTransaction(FrameLayerBuilder::DrawThebesLayer, aBuilder);
|
|
}
|
|
aLayerBuilder->DidEndTransaction(tempManager);
|
|
|
|
#ifdef MOZ_DUMP_PAINTING
|
|
if (gfxUtils::sDumpPainting) {
|
|
DumpPaintedImage(aItem, surf);
|
|
|
|
surf->SetDeviceOffset(gfxPoint(0, 0));
|
|
aContext->SetSource(surf, itemVisibleRect.TopLeft());
|
|
aContext->Rectangle(itemVisibleRect);
|
|
aContext->Fill();
|
|
aItem->SetPainted();
|
|
}
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* 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 ThebesLayers where an item
|
|
* has moved from one ThebesLayer to another. Also,
|
|
* aState->mInvalidThebesContent is invalidated in every ThebesLayer.
|
|
* We set the clip rect for items that generated their own layer, and
|
|
* create a mask layer to do any rounded rect clipping.
|
|
* (ThebesLayers 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 ThebesLayers is deferred until the calling
|
|
* of ContainerState::Finish.
|
|
*/
|
|
void
|
|
ContainerState::ProcessDisplayItems(const nsDisplayList& aList,
|
|
FrameLayerBuilder::Clip& aClip,
|
|
uint32_t aFlags)
|
|
{
|
|
SAMPLE_LABEL("ContainerState", "ProcessDisplayItems");
|
|
for (nsDisplayItem* item = aList.GetBottom(); item; item = item->GetAbove()) {
|
|
nsDisplayItem::Type type = item->GetType();
|
|
if (type == nsDisplayItem::TYPE_CLIP ||
|
|
type == nsDisplayItem::TYPE_CLIP_ROUNDED_RECT) {
|
|
FrameLayerBuilder::Clip childClip(aClip, item);
|
|
ProcessDisplayItems(*item->GetList(), childClip, aFlags);
|
|
continue;
|
|
}
|
|
|
|
NS_ASSERTION(mAppUnitsPerDevPixel == AppUnitsPerDevPixel(item),
|
|
"items in a container layer should all have the same app units per dev pixel");
|
|
|
|
nsIntRect itemVisibleRect =
|
|
ScaleToOutsidePixels(item->GetVisibleRect(), false);
|
|
bool snap;
|
|
nsRect itemContent = item->GetBounds(mBuilder, &snap);
|
|
nsIntRect itemDrawRect = ScaleToOutsidePixels(itemContent, snap);
|
|
if (aClip.mHaveClipRect) {
|
|
itemContent.IntersectRect(itemContent, aClip.mClipRect);
|
|
nsIntRect clipRect = ScaleToNearestPixels(aClip.mClipRect);
|
|
itemDrawRect.IntersectRect(itemDrawRect, clipRect);
|
|
}
|
|
mBounds.UnionRect(mBounds, itemContent);
|
|
itemVisibleRect.IntersectRect(itemVisibleRect, itemDrawRect);
|
|
|
|
LayerState layerState = item->GetLayerState(mBuilder, mManager, mParameters);
|
|
|
|
bool isFixed;
|
|
bool forceInactive;
|
|
const nsIFrame* activeScrolledRoot;
|
|
if (aFlags & NO_COMPONENT_ALPHA) {
|
|
// When NO_COMPONENT_ALPHA is set, items will be flattened onto the
|
|
// reference frame. In this case, force the active scrolled root to
|
|
// that frame.
|
|
forceInactive = true;
|
|
activeScrolledRoot = mBuilder->FindReferenceFrameFor(mContainerFrame);
|
|
isFixed = mBuilder->IsFixedItem(item, nullptr, activeScrolledRoot);
|
|
} else {
|
|
forceInactive = false;
|
|
isFixed = mBuilder->IsFixedItem(item, &activeScrolledRoot);
|
|
}
|
|
|
|
// Assign the item to a layer
|
|
if (layerState == LAYER_ACTIVE_FORCE ||
|
|
(!forceInactive &&
|
|
(layerState == LAYER_ACTIVE_EMPTY ||
|
|
layerState == LAYER_ACTIVE))) {
|
|
|
|
// 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.");
|
|
|
|
// 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 ThebesLayer may decide it wants to draw them
|
|
// into its buffer even if they're currently covered.
|
|
if (itemVisibleRect.IsEmpty() && layerState != LAYER_ACTIVE_EMPTY) {
|
|
InvalidateForLayerChange(item, nullptr);
|
|
continue;
|
|
}
|
|
|
|
// Just use its layer.
|
|
nsRefPtr<Layer> ownLayer = item->BuildLayer(mBuilder, mManager, mParameters);
|
|
if (!ownLayer) {
|
|
InvalidateForLayerChange(item, ownLayer);
|
|
continue;
|
|
}
|
|
|
|
// If it's not a ContainerLayer, we need to apply the scale transform
|
|
// ourselves.
|
|
if (!ownLayer->AsContainerLayer()) {
|
|
ownLayer->SetPostScale(mParameters.mXScale,
|
|
mParameters.mYScale);
|
|
}
|
|
|
|
ownLayer->SetIsFixedPosition(isFixed);
|
|
|
|
// 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(aClip.mHaveClipRect ||
|
|
aClip.mRoundedClipRects.IsEmpty(),
|
|
"If we have rounded rects, we must have a clip rect");
|
|
// It has its own layer. Update that layer's clip and visible rects.
|
|
if (aClip.mHaveClipRect) {
|
|
nsIntRect clip = ScaleToNearestPixels(aClip.NonRoundedIntersection());
|
|
clip.MoveBy(mParameters.mOffset);
|
|
ownLayer->IntersectClipRect(clip);
|
|
}
|
|
ThebesLayerData* data = GetTopThebesLayerData();
|
|
if (data) {
|
|
data->mVisibleAboveRegion.Or(data->mVisibleAboveRegion, itemVisibleRect);
|
|
data->mVisibleAboveRegion.SimplifyOutward(4);
|
|
// Add the entire bounds rect to the mDrawAboveRegion.
|
|
// The visible region may be excluding opaque content above the
|
|
// item, and we need to ensure that that content is not placed
|
|
// in a ThebesLayer below the item!
|
|
data->mDrawAboveRegion.Or(data->mDrawAboveRegion, itemDrawRect);
|
|
data->mDrawAboveRegion.SimplifyOutward(4);
|
|
}
|
|
itemVisibleRect.MoveBy(mParameters.mOffset);
|
|
RestrictVisibleRegionForLayer(ownLayer, itemVisibleRect);
|
|
|
|
// rounded rectangle clipping using mask layers
|
|
// (must be done after visible rect is set on layer)
|
|
if (aClip.IsRectClippedByRoundedCorner(itemContent)) {
|
|
SetupMaskLayer(ownLayer, aClip);
|
|
}
|
|
|
|
ContainerLayer* oldContainer = ownLayer->GetParent();
|
|
if (oldContainer && oldContainer != mContainerLayer) {
|
|
oldContainer->RemoveChild(ownLayer);
|
|
}
|
|
NS_ASSERTION(!mNewChildLayers.Contains(ownLayer),
|
|
"Layer already in list???");
|
|
|
|
InvalidateForLayerChange(item, ownLayer);
|
|
|
|
mNewChildLayers.AppendElement(ownLayer);
|
|
mLayerBuilder->AddLayerDisplayItem(ownLayer, item, layerState);
|
|
} else {
|
|
ThebesLayerData* data =
|
|
FindThebesLayerFor(item, itemVisibleRect, itemDrawRect, aClip,
|
|
activeScrolledRoot);
|
|
|
|
data->mLayer->SetIsFixedPosition(isFixed);
|
|
|
|
InvalidateForLayerChange(item, data->mLayer);
|
|
|
|
mLayerBuilder->AddThebesDisplayItem(data->mLayer, item, aClip,
|
|
mContainerFrame,
|
|
layerState);
|
|
|
|
// check to see if the new item has rounded rect clips in common with
|
|
// other items in the layer
|
|
data->UpdateCommonClipCount(aClip);
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
ContainerState::InvalidateForLayerChange(nsDisplayItem* aItem, Layer* aNewLayer)
|
|
{
|
|
NS_ASSERTION(aItem->GetUnderlyingFrame(), "Display items that render using Thebes must have a frame");
|
|
NS_ASSERTION(aItem->GetPerFrameKey(), "Display items that render using Thebes must have a key");
|
|
Layer* oldLayer = mLayerBuilder->GetOldLayerFor(aItem);
|
|
if (!oldLayer) {
|
|
// Nothing to do here, this item didn't have a layer before
|
|
return;
|
|
}
|
|
if (aNewLayer != oldLayer) {
|
|
// The item has changed layers.
|
|
// Invalidate the bounds in the old layer and new layer.
|
|
// The bounds might have changed, but we assume that any difference
|
|
// in the bounds will have been invalidated for all Thebes layers
|
|
// in the container via regular frame invalidation.
|
|
bool snap;
|
|
nsRect bounds = aItem->GetBounds(mBuilder, &snap);
|
|
|
|
ThebesLayer* t = oldLayer->AsThebesLayer();
|
|
if (t) {
|
|
ThebesDisplayItemLayerUserData* data =
|
|
static_cast<ThebesDisplayItemLayerUserData*>(t->GetUserData(&gThebesDisplayItemLayerUserData));
|
|
// 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
|
|
InvalidatePostTransformRegion(t,
|
|
bounds.ScaleToOutsidePixels(data->mXScale, data->mYScale, mAppUnitsPerDevPixel),
|
|
mLayerBuilder->GetLastPaintOffset(t));
|
|
}
|
|
if (aNewLayer) {
|
|
ThebesLayer* newLayer = aNewLayer->AsThebesLayer();
|
|
if (newLayer) {
|
|
ThebesDisplayItemLayerUserData* data =
|
|
static_cast<ThebesDisplayItemLayerUserData*>(newLayer->GetUserData(&gThebesDisplayItemLayerUserData));
|
|
InvalidatePostTransformRegion(newLayer,
|
|
bounds.ScaleToOutsidePixels(data->mXScale, data->mYScale, mAppUnitsPerDevPixel),
|
|
GetTranslationForThebesLayer(newLayer));
|
|
}
|
|
}
|
|
|
|
mContainerFrame->InvalidateWithFlags(
|
|
bounds - mBuilder->ToReferenceFrame(mContainerFrame),
|
|
nsIFrame::INVALIDATE_NO_THEBES_LAYERS |
|
|
nsIFrame::INVALIDATE_EXCLUDE_CURRENT_PAINT);
|
|
}
|
|
}
|
|
|
|
bool
|
|
FrameLayerBuilder::NeedToInvalidateFixedDisplayItem(nsDisplayListBuilder* aBuilder,
|
|
nsDisplayItem* aItem)
|
|
{
|
|
return !aItem->ShouldFixToViewport(aBuilder) ||
|
|
!HasRetainedLayerFor(aItem->GetUnderlyingFrame(), aItem->GetPerFrameKey());
|
|
}
|
|
|
|
void
|
|
FrameLayerBuilder::AddThebesDisplayItem(ThebesLayer* aLayer,
|
|
nsDisplayItem* aItem,
|
|
const Clip& aClip,
|
|
nsIFrame* aContainerLayerFrame,
|
|
LayerState aLayerState)
|
|
{
|
|
AddLayerDisplayItem(aLayer, aItem, aLayerState);
|
|
|
|
ThebesLayerItemsEntry* entry = mThebesLayerItems.PutEntry(aLayer);
|
|
if (entry) {
|
|
entry->mContainerLayerFrame = aContainerLayerFrame;
|
|
if (entry->mContainerLayerGeneration == 0) {
|
|
entry->mContainerLayerGeneration = mContainerLayerGeneration;
|
|
}
|
|
NS_ASSERTION(aItem->GetUnderlyingFrame(), "Must have frame");
|
|
ClippedDisplayItem* cdi =
|
|
entry->mItems.AppendElement(ClippedDisplayItem(aItem, aClip,
|
|
mContainerLayerGeneration));
|
|
cdi->mInactiveLayer = aLayerState != LAYER_NONE;
|
|
}
|
|
}
|
|
|
|
void
|
|
FrameLayerBuilder::AddLayerDisplayItemForFrame(Layer* aLayer,
|
|
nsIFrame* aFrame,
|
|
uint32_t aDisplayItemKey,
|
|
LayerState aLayerState)
|
|
{
|
|
DisplayItemDataEntry* entry = mNewDisplayItemData.PutEntry(aFrame);
|
|
if (entry) {
|
|
entry->mContainerLayerGeneration = mContainerLayerGeneration;
|
|
entry->mData.AppendElement(DisplayItemData(aLayer, aDisplayItemKey, aLayerState, mContainerLayerGeneration));
|
|
}
|
|
}
|
|
|
|
void
|
|
FrameLayerBuilder::AddLayerDisplayItem(Layer* aLayer,
|
|
nsDisplayItem* aItem,
|
|
LayerState aLayerState)
|
|
{
|
|
if (aLayer->Manager() != mRetainingManager)
|
|
return;
|
|
|
|
nsIFrame* f = aItem->GetUnderlyingFrame();
|
|
uint32_t key = aItem->GetPerFrameKey();
|
|
AddLayerDisplayItemForFrame(aLayer, f, key, aLayerState);
|
|
|
|
nsAutoTArray<nsIFrame*,4> mergedFrames;
|
|
aItem->GetMergedFrames(&mergedFrames);
|
|
for (uint32_t i = 0; i < mergedFrames.Length(); ++i) {
|
|
AddLayerDisplayItemForFrame(aLayer, mergedFrames[i], key, aLayerState);
|
|
}
|
|
}
|
|
|
|
nsIntPoint
|
|
FrameLayerBuilder::GetLastPaintOffset(ThebesLayer* aLayer)
|
|
{
|
|
ThebesLayerItemsEntry* entry = mThebesLayerItems.PutEntry(aLayer);
|
|
if (entry) {
|
|
if (entry->mContainerLayerGeneration == 0) {
|
|
entry->mContainerLayerGeneration = mContainerLayerGeneration;
|
|
}
|
|
if (entry->mHasExplicitLastPaintOffset)
|
|
return entry->mLastPaintOffset;
|
|
}
|
|
return GetTranslationForThebesLayer(aLayer);
|
|
}
|
|
|
|
void
|
|
FrameLayerBuilder::SaveLastPaintOffset(ThebesLayer* aLayer)
|
|
{
|
|
ThebesLayerItemsEntry* entry = mThebesLayerItems.PutEntry(aLayer);
|
|
if (entry) {
|
|
if (entry->mContainerLayerGeneration == 0) {
|
|
entry->mContainerLayerGeneration = mContainerLayerGeneration;
|
|
}
|
|
entry->mLastPaintOffset = GetTranslationForThebesLayer(aLayer);
|
|
entry->mHasExplicitLastPaintOffset = true;
|
|
}
|
|
}
|
|
|
|
nscolor
|
|
FrameLayerBuilder::FindOpaqueColorCovering(nsDisplayListBuilder* aBuilder,
|
|
ThebesLayer* aLayer,
|
|
const nsRect& aRect)
|
|
{
|
|
ThebesLayerItemsEntry* entry = mThebesLayerItems.GetEntry(aLayer);
|
|
NS_ASSERTION(entry, "Must know about this layer!");
|
|
for (int32_t i = entry->mItems.Length() - 1; i >= 0; --i) {
|
|
nsDisplayItem* item = entry->mItems[i].mItem;
|
|
const nsRect& visible = item->GetVisibleRect();
|
|
if (!visible.Intersects(aRect))
|
|
continue;
|
|
|
|
nscolor color;
|
|
if (visible.Contains(aRect) && item->IsUniform(aBuilder, &color) &&
|
|
NS_GET_A(color) == 255)
|
|
return color;
|
|
break;
|
|
}
|
|
return NS_RGBA(0,0,0,0);
|
|
}
|
|
|
|
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(&gThebesDisplayItemLayerUserData)) {
|
|
NS_ASSERTION(layer->AsThebesLayer(), "Wrong layer type");
|
|
mRecycledThebesLayers.AppendElement(static_cast<ThebesLayer*>(layer));
|
|
}
|
|
|
|
if (Layer* maskLayer = layer->GetMaskLayer()) {
|
|
NS_ASSERTION(maskLayer->GetType() == Layer::TYPE_IMAGE,
|
|
"Could not recycle mask layer, unsupported layer type.");
|
|
mRecycledMaskImageLayers.Put(layer, static_cast<ImageLayer*>(maskLayer));
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
ContainerState::Finish(uint32_t* aTextContentFlags)
|
|
{
|
|
while (!mThebesLayerDataStack.IsEmpty()) {
|
|
PopThebesLayerData();
|
|
}
|
|
|
|
uint32_t textContentFlags = 0;
|
|
|
|
// Make sure that current/existing layers are added to the parent and are
|
|
// in the correct order.
|
|
Layer* layer = nullptr;
|
|
for (uint32_t i = 0; i < mNewChildLayers.Length(); ++i) {
|
|
Layer* prevChild = i == 0 ? nullptr : mNewChildLayers[i - 1].get();
|
|
layer = mNewChildLayers[i];
|
|
|
|
if (!layer->GetVisibleRegion().IsEmpty()) {
|
|
textContentFlags |= layer->GetContentFlags() & Layer::CONTENT_COMPONENT_ALPHA;
|
|
}
|
|
|
|
if (!layer->GetParent()) {
|
|
// This is not currently a child of the container, so just add it
|
|
// now.
|
|
mContainerLayer->InsertAfter(layer, prevChild);
|
|
continue;
|
|
}
|
|
|
|
NS_ASSERTION(layer->GetParent() == mContainerLayer,
|
|
"Layer shouldn't be the child of some other container");
|
|
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 FrameLayerBuilder::ContainerParameters
|
|
ChooseScaleAndSetTransform(FrameLayerBuilder* aLayerBuilder,
|
|
nsDisplayListBuilder* aDisplayListBuilder,
|
|
nsIFrame* aContainerFrame,
|
|
const gfx3DMatrix* aTransform,
|
|
const FrameLayerBuilder::ContainerParameters& aIncomingScale,
|
|
ContainerLayer* aLayer,
|
|
LayerState aState)
|
|
{
|
|
nsIntPoint offset;
|
|
|
|
gfx3DMatrix transform =
|
|
gfx3DMatrix::ScalingMatrix(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.
|
|
transform.NudgeToIntegers();
|
|
}
|
|
if (aContainerFrame && aState == LAYER_INACTIVE) {
|
|
// 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.
|
|
nsPoint appUnitOffset = aDisplayListBuilder->ToReferenceFrame(aContainerFrame);
|
|
nscoord appUnitsPerDevPixel = aContainerFrame->PresContext()->AppUnitsPerDevPixel();
|
|
offset = nsIntPoint(
|
|
int32_t(NSAppUnitsToDoublePixels(appUnitOffset.x, appUnitsPerDevPixel)*aIncomingScale.mXScale),
|
|
int32_t(NSAppUnitsToDoublePixels(appUnitOffset.y, appUnitsPerDevPixel)*aIncomingScale.mYScale));
|
|
}
|
|
transform = transform * gfx3DMatrix::Translation(offset.x + aIncomingScale.mOffset.x, offset.y + aIncomingScale.mOffset.y, 0);
|
|
|
|
gfxMatrix transform2d;
|
|
bool canDraw2D = transform.CanDraw2D(&transform2d);
|
|
gfxSize scale;
|
|
bool isRetained = aLayerBuilder->GetRetainingLayerManager() == aLayer->Manager();
|
|
// Only fiddle with scale factors for the retaining layer manager, since
|
|
// it only matters for retained layers
|
|
// XXX Should we do something for 3D transforms?
|
|
if (canDraw2D && isRetained) {
|
|
//Scale factors are normalized to a power of 2 to reduce the number of resolution changes
|
|
scale = 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.
|
|
gfxMatrix frameTransform;
|
|
if (aContainerFrame->AreLayersMarkedActive(nsChangeHint_UpdateTransformLayer) &&
|
|
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;
|
|
gfxMatrix oldFrameTransform2d;
|
|
if (aLayer->GetTransform().Is2D(&oldFrameTransform2d)) {
|
|
gfxSize oldScale = 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);
|
|
}
|
|
} 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));
|
|
|
|
FrameLayerBuilder::ContainerParameters
|
|
result(scale.width, scale.height, -offset, aIncomingScale);
|
|
if (aTransform) {
|
|
result.mInTransformedSubtree = true;
|
|
if (aContainerFrame->AreLayersMarkedActive(nsChangeHint_UpdateTransformLayer)) {
|
|
result.mInActiveTransformedSubtree = true;
|
|
}
|
|
}
|
|
if (isRetained && (!canDraw2D || transform2d.HasNonIntegerTranslation())) {
|
|
result.mDisableSubpixelAntialiasingInDescendants = true;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
static void
|
|
ApplyThebesLayerInvalidation(nsDisplayListBuilder* aBuilder,
|
|
nsIFrame* aContainerFrame,
|
|
nsDisplayItem* aContainerItem,
|
|
ContainerState& aState,
|
|
nsPoint* aCurrentOffset,
|
|
nsDisplayTransform* aTransform)
|
|
{
|
|
*aCurrentOffset = aContainerItem ? aContainerItem->ToReferenceFrame()
|
|
: aBuilder->ToReferenceFrame(aContainerFrame);
|
|
|
|
FrameProperties props = aContainerFrame->Properties();
|
|
RefCountedRegion* invalidThebesContent = static_cast<RefCountedRegion*>
|
|
(props.Get(ThebesLayerInvalidRegionProperty()));
|
|
const FrameLayerBuilder::ContainerParameters& scaleParameters = aState.ScaleParameters();
|
|
|
|
nsRegion invalidRegion;
|
|
if (invalidThebesContent) {
|
|
if (invalidThebesContent->mIsInfinite) {
|
|
// The region was marked as infinite to indicate that everything should be
|
|
// invalidated.
|
|
aState.SetInvalidateAllThebesContent();
|
|
return;
|
|
}
|
|
|
|
invalidRegion = invalidThebesContent->mRegion;
|
|
} else {
|
|
// The region doesn't exist, so this is a newly visible frame. Invalidate
|
|
// the frame area.
|
|
invalidRegion =
|
|
aContainerFrame->GetVisualOverflowRectRelativeToSelf() + *aCurrentOffset;
|
|
}
|
|
|
|
if (aTransform) {
|
|
// XXX We're simplifying the transform by only using the bounds of the
|
|
// region. This may have performance implications.
|
|
invalidRegion = aTransform->
|
|
TransformRectOut(invalidRegion.GetBounds(),
|
|
aTransform->GetUnderlyingFrame(), -(*aCurrentOffset));
|
|
}
|
|
|
|
aState.AddInvalidThebesContent(invalidRegion.
|
|
ScaleToOutsidePixels(scaleParameters.mXScale, scaleParameters.mYScale,
|
|
aState.GetAppUnitsPerDevPixel()));
|
|
|
|
// We have to preserve the current contents of invalidThebesContent
|
|
// because there might be multiple container layers for the same
|
|
// frame and we need to invalidate the ThebesLayer children of all
|
|
// of them. Also, multiple calls to ApplyThebesLayerInvalidation for the
|
|
// same layer can share the same region.
|
|
}
|
|
|
|
/* static */ PLDHashOperator
|
|
FrameLayerBuilder::RestoreDisplayItemData(DisplayItemDataEntry* aEntry, void* aUserArg)
|
|
{
|
|
uint32_t *generation = static_cast<uint32_t*>(aUserArg);
|
|
|
|
if (aEntry->mContainerLayerGeneration >= *generation) {
|
|
return PL_DHASH_REMOVE;
|
|
}
|
|
|
|
for (uint32_t i = 0; i < aEntry->mData.Length(); i++) {
|
|
if (aEntry->mData[i].mContainerLayerGeneration >= *generation) {
|
|
aEntry->mData.TruncateLength(i);
|
|
return PL_DHASH_NEXT;
|
|
}
|
|
}
|
|
|
|
return PL_DHASH_NEXT;
|
|
}
|
|
|
|
/* static */ PLDHashOperator
|
|
FrameLayerBuilder::RestoreThebesLayerItemEntries(ThebesLayerItemsEntry* aEntry, void* aUserArg)
|
|
{
|
|
uint32_t *generation = static_cast<uint32_t*>(aUserArg);
|
|
|
|
if (aEntry->mContainerLayerGeneration >= *generation) {
|
|
return PL_DHASH_REMOVE;
|
|
}
|
|
|
|
for (uint32_t i = 0; i < aEntry->mItems.Length(); i++) {
|
|
if (aEntry->mItems[i].mContainerLayerGeneration >= *generation) {
|
|
aEntry->mItems.TruncateLength(i);
|
|
return PL_DHASH_NEXT;
|
|
}
|
|
}
|
|
|
|
return PL_DHASH_NEXT;
|
|
}
|
|
|
|
static nsDisplayTransform* FindTransformForContainerFrame(nsIFrame* aContainerFrame,
|
|
nsDisplayItem* aContainerItem)
|
|
{
|
|
if (!aContainerFrame->IsTransformed() ||
|
|
aContainerItem->GetType() == nsDisplayItem::TYPE_TRANSFORM)
|
|
return nullptr;
|
|
|
|
nsTArray<nsDisplayItem*> queue;
|
|
queue.AppendElement(aContainerItem);
|
|
while (queue.Length()) {
|
|
nsDisplayItem* item = queue[queue.Length() - 1];
|
|
queue.RemoveElementAt(queue.Length() - 1);
|
|
|
|
if (item->GetType() == nsDisplayItem::TYPE_TRANSFORM) {
|
|
return static_cast<nsDisplayTransform*>(item);
|
|
}
|
|
|
|
if (item->GetList()) {
|
|
for (nsDisplayItem* child = item->GetList()->GetBottom(); child;
|
|
child = child->GetAbove()) {
|
|
if (child->GetUnderlyingFrame() == aContainerFrame) {
|
|
queue.AppendElement(child);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
already_AddRefed<ContainerLayer>
|
|
FrameLayerBuilder::BuildContainerLayerFor(nsDisplayListBuilder* aBuilder,
|
|
LayerManager* aManager,
|
|
nsIFrame* aContainerFrame,
|
|
nsDisplayItem* aContainerItem,
|
|
const nsDisplayList& aChildren,
|
|
const ContainerParameters& aParameters,
|
|
const gfx3DMatrix* aTransform)
|
|
{
|
|
uint32_t containerDisplayItemKey =
|
|
aContainerItem ? aContainerItem->GetPerFrameKey() : 0;
|
|
NS_ASSERTION(aContainerFrame, "Container display items here should have a frame");
|
|
NS_ASSERTION(!aContainerItem ||
|
|
aContainerItem->GetUnderlyingFrame() == aContainerFrame,
|
|
"Container display item must match given frame");
|
|
|
|
nsRefPtr<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 = aContainerItem ?
|
|
GetOldLayerFor(aContainerItem) :
|
|
GetOldLayerForFrame(aContainerFrame, containerDisplayItemKey);
|
|
|
|
if (oldLayer) {
|
|
NS_ASSERTION(oldLayer->Manager() == aManager, "Wrong manager");
|
|
if (oldLayer->HasUserData(&gThebesDisplayItemLayerUserData)) {
|
|
// The old layer for this item is actually our ThebesLayer
|
|
// because we rendered its layer into that ThebesLayer. 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);
|
|
// Clear clip rect; the caller will set it if necessary.
|
|
containerLayer->SetClipRect(nullptr);
|
|
containerLayer->SetMaskLayer(nullptr);
|
|
}
|
|
}
|
|
}
|
|
if (!containerLayer) {
|
|
// No suitable existing layer was found.
|
|
containerLayer = aManager->CreateContainerLayer();
|
|
if (!containerLayer)
|
|
return nullptr;
|
|
}
|
|
|
|
// This layer is owned by this frame for this building phase, don't let
|
|
// it be found by another frame due to its old underlying frame or merged
|
|
// frames. This flag will be cleared in FrameLayerBuilder::DidEndTransaction
|
|
containerLayer->SetUserData(&gLayerOwnerUserData,
|
|
new LayerOwnerUserData(aContainerFrame));
|
|
|
|
LayerState state = aContainerItem ? aContainerItem->GetLayerState(aBuilder, aManager, aParameters) : 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 thebes 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();
|
|
}
|
|
|
|
ContainerParameters scaleParameters =
|
|
ChooseScaleAndSetTransform(this, aBuilder, aContainerFrame, aTransform, aParameters,
|
|
containerLayer, state);
|
|
|
|
uint32_t oldGeneration = mContainerLayerGeneration;
|
|
mContainerLayerGeneration = ++mMaxContainerLayerGeneration;
|
|
|
|
nsRefPtr<RefCountedRegion> thebesLayerInvalidRegion = nullptr;
|
|
if (aManager == mRetainingManager) {
|
|
FrameProperties props = aContainerFrame->Properties();
|
|
DisplayItemDataEntry* entry = mNewDisplayItemData.PutEntry(aContainerFrame);
|
|
if (entry) {
|
|
entry->mData.AppendElement(
|
|
DisplayItemData(containerLayer, containerDisplayItemKey,
|
|
LAYER_ACTIVE, mContainerLayerGeneration));
|
|
thebesLayerInvalidRegion = static_cast<RefCountedRegion*>
|
|
(props.Get(ThebesLayerInvalidRegionProperty()));
|
|
if (!thebesLayerInvalidRegion) {
|
|
thebesLayerInvalidRegion = new RefCountedRegion();
|
|
}
|
|
entry->mInvalidRegion = thebesLayerInvalidRegion;
|
|
entry->mContainerLayerGeneration = mContainerLayerGeneration;
|
|
}
|
|
}
|
|
|
|
nsRect bounds;
|
|
nsIntRect pixBounds;
|
|
int32_t appUnitsPerDevPixel;
|
|
uint32_t stateFlags =
|
|
(aContainerFrame->GetStateBits() & NS_FRAME_NO_COMPONENT_ALPHA) ?
|
|
ContainerState::NO_COMPONENT_ALPHA : 0;
|
|
uint32_t flags;
|
|
bool flattenedLayers = false;
|
|
while (true) {
|
|
ContainerState state(aBuilder, aManager, aManager->GetLayerBuilder(),
|
|
aContainerFrame, containerLayer, scaleParameters);
|
|
if (flattenedLayers) {
|
|
state.SetInvalidateAllThebesContent();
|
|
}
|
|
|
|
if (aManager == mRetainingManager) {
|
|
// If the container frame has a transform and it's contained in the
|
|
// container item's sub-tree, we need to transform the invalid region
|
|
// before applying it.
|
|
nsDisplayTransform* transformItem =
|
|
FindTransformForContainerFrame(aContainerFrame, aContainerItem);
|
|
|
|
nsPoint currentOffset;
|
|
ApplyThebesLayerInvalidation(aBuilder, aContainerFrame, aContainerItem, state,
|
|
¤tOffset, transformItem);
|
|
SetHasContainerLayer(aContainerFrame, currentOffset);
|
|
|
|
nsAutoTArray<nsIFrame*,4> mergedFrames;
|
|
if (aContainerItem) {
|
|
aContainerItem->GetMergedFrames(&mergedFrames);
|
|
}
|
|
for (uint32_t i = 0; i < mergedFrames.Length(); ++i) {
|
|
nsIFrame* mergedFrame = mergedFrames[i];
|
|
DisplayItemDataEntry* entry = mNewDisplayItemData.PutEntry(mergedFrame);
|
|
if (entry) {
|
|
// Append the container layer so we don't regenerate layers when
|
|
// the underlying frame of an item changes to one of the existing
|
|
// merged frames.
|
|
entry->mData.AppendElement(
|
|
DisplayItemData(containerLayer, containerDisplayItemKey,
|
|
LAYER_ACTIVE, mContainerLayerGeneration));
|
|
|
|
// Ensure that UpdateDisplayItemDataForFrame recognizes that we
|
|
// still have a container layer associated with this frame.
|
|
entry->mIsSharingContainerLayer = true;
|
|
|
|
// Store the invalid region property in case this frame is represented
|
|
// by multiple container layers. This is cleared and set when iterating
|
|
// over the DisplayItemDataEntry's in WillEndTransaction.
|
|
entry->mInvalidRegion = thebesLayerInvalidRegion;
|
|
}
|
|
ApplyThebesLayerInvalidation(aBuilder, mergedFrame, nullptr, state,
|
|
¤tOffset, transformItem);
|
|
SetHasContainerLayer(mergedFrame, currentOffset);
|
|
}
|
|
}
|
|
|
|
Clip clip;
|
|
state.ProcessDisplayItems(aChildren, clip, stateFlags);
|
|
|
|
// 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.
|
|
state.Finish(&flags);
|
|
bounds = state.GetChildrenBounds();
|
|
pixBounds = state.ScaleToOutsidePixels(bounds, false);
|
|
appUnitsPerDevPixel = state.GetAppUnitsPerDevPixel();
|
|
|
|
if ((flags & Layer::CONTENT_COMPONENT_ALPHA) &&
|
|
mRetainingManager &&
|
|
!mRetainingManager->AreComponentAlphaLayersEnabled() &&
|
|
!stateFlags) {
|
|
// 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.
|
|
stateFlags = ContainerState::NO_COMPONENT_ALPHA;
|
|
mNewDisplayItemData.EnumerateEntries(RestoreDisplayItemData,
|
|
&mContainerLayerGeneration);
|
|
mThebesLayerItems.EnumerateEntries(RestoreThebesLayerItemEntries,
|
|
&mContainerLayerGeneration);
|
|
aContainerFrame->AddStateBits(NS_FRAME_NO_COMPONENT_ALPHA);
|
|
flattenedLayers = true;
|
|
continue;
|
|
}
|
|
break;
|
|
}
|
|
|
|
NS_ASSERTION(bounds.IsEqualInterior(aChildren.GetBounds(aBuilder)), "Wrong bounds");
|
|
pixBounds.MoveBy(nsIntPoint(scaleParameters.mOffset.x, scaleParameters.mOffset.y));
|
|
containerLayer->SetVisibleRegion(pixBounds);
|
|
// 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(pixBounds.ToAppUnits(appUnitsPerDevPixel))) {
|
|
// Clear CONTENT_COMPONENT_ALPHA
|
|
flags = Layer::CONTENT_OPAQUE;
|
|
}
|
|
}
|
|
containerLayer->SetContentFlags(flags);
|
|
|
|
mContainerLayerGeneration = oldGeneration;
|
|
return containerLayer.forget();
|
|
}
|
|
|
|
Layer*
|
|
FrameLayerBuilder::GetLeafLayerFor(nsDisplayListBuilder* aBuilder,
|
|
LayerManager* aManager,
|
|
nsDisplayItem* aItem)
|
|
{
|
|
if (aManager != mRetainingManager)
|
|
return nullptr;
|
|
|
|
nsIFrame* f = aItem->GetUnderlyingFrame();
|
|
NS_ASSERTION(f, "Can only call GetLeafLayerFor on items that have a frame");
|
|
Layer* layer = GetOldLayerForFrame(f, aItem->GetPerFrameKey());
|
|
if (!layer)
|
|
return nullptr;
|
|
if (layer->HasUserData(&gThebesDisplayItemLayerUserData)) {
|
|
// 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;
|
|
}
|
|
// Clear clip rect; the caller is responsible for setting it.
|
|
layer->SetClipRect(nullptr);
|
|
layer->SetMaskLayer(nullptr);
|
|
return layer;
|
|
}
|
|
|
|
/* static */ void
|
|
FrameLayerBuilder::InvalidateThebesLayerContents(nsIFrame* aFrame,
|
|
const nsRect& aRect)
|
|
{
|
|
FrameProperties props = aFrame->Properties();
|
|
RefCountedRegion* invalidThebesContent = static_cast<RefCountedRegion*>
|
|
(props.Get(ThebesLayerInvalidRegionProperty()));
|
|
if (!invalidThebesContent)
|
|
return;
|
|
|
|
nsPoint* offsetAtLastPaint = static_cast<nsPoint*>
|
|
(props.Get(ThebesLayerLastPaintOffsetProperty()));
|
|
NS_ASSERTION(offsetAtLastPaint,
|
|
"This must have been set up along with ThebesLayerInvalidRegionProperty");
|
|
invalidThebesContent->mRegion.Or(invalidThebesContent->mRegion,
|
|
aRect + *offsetAtLastPaint);
|
|
invalidThebesContent->mRegion.SimplifyOutward(20);
|
|
}
|
|
|
|
/**
|
|
* Returns true if we find a descendant with a container layer
|
|
*/
|
|
static bool
|
|
InternalInvalidateThebesLayersInSubtree(nsIFrame* aFrame, bool aTrustFrameGeometry)
|
|
{
|
|
if (!(aFrame->GetStateBits() & NS_FRAME_HAS_CONTAINER_LAYER_DESCENDANT))
|
|
return false;
|
|
|
|
bool foundContainerLayer = false;
|
|
if (aFrame->GetStateBits() & NS_FRAME_HAS_CONTAINER_LAYER) {
|
|
if (aTrustFrameGeometry) {
|
|
// Just invalidate the area covered by the frame. This helps if a single
|
|
// region is being shared by multiple container layers.
|
|
FrameLayerBuilder::InvalidateThebesLayerContents(aFrame,
|
|
aFrame->GetVisualOverflowRectRelativeToSelf());
|
|
} else {
|
|
// Mark the invalid region as infinite to indicate that all Thebes
|
|
// contents need to be invalidated
|
|
FrameProperties props = aFrame->Properties();
|
|
RefCountedRegion* invalidRegion = static_cast<RefCountedRegion*>
|
|
(props.Get(ThebesLayerInvalidRegionProperty()));
|
|
if (!invalidRegion) {
|
|
invalidRegion = new RefCountedRegion();
|
|
invalidRegion->AddRef();
|
|
props.Set(ThebesLayerInvalidRegionProperty(), invalidRegion);
|
|
}
|
|
invalidRegion->mIsInfinite = true;
|
|
}
|
|
foundContainerLayer = true;
|
|
}
|
|
|
|
nsAutoTArray<nsIFrame::ChildList,4> childListArray;
|
|
if (!aFrame->GetFirstPrincipalChild()) {
|
|
nsSubDocumentFrame* subdocumentFrame = do_QueryFrame(aFrame);
|
|
if (subdocumentFrame) {
|
|
// Descend into the subdocument
|
|
nsIFrame* root = subdocumentFrame->GetSubdocumentRootFrame();
|
|
if (root) {
|
|
childListArray.AppendElement(nsIFrame::ChildList(
|
|
nsFrameList(root, nsLayoutUtils::GetLastSibling(root)),
|
|
nsIFrame::kPrincipalList));
|
|
}
|
|
}
|
|
}
|
|
|
|
aFrame->GetChildLists(&childListArray);
|
|
nsIFrame::ChildListArrayIterator lists(childListArray);
|
|
for (; !lists.IsDone(); lists.Next()) {
|
|
nsFrameList::Enumerator childFrames(lists.CurrentList());
|
|
for (; !childFrames.AtEnd(); childFrames.Next()) {
|
|
if (InternalInvalidateThebesLayersInSubtree(childFrames.get(),
|
|
aTrustFrameGeometry)) {
|
|
foundContainerLayer = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!foundContainerLayer) {
|
|
aFrame->RemoveStateBits(NS_FRAME_HAS_CONTAINER_LAYER_DESCENDANT);
|
|
}
|
|
return foundContainerLayer;
|
|
}
|
|
|
|
/* static */ void
|
|
FrameLayerBuilder::InvalidateThebesLayersInSubtree(nsIFrame* aFrame)
|
|
{
|
|
InternalInvalidateThebesLayersInSubtree(aFrame, true);
|
|
}
|
|
|
|
/* static */ void
|
|
FrameLayerBuilder::InvalidateThebesLayersInSubtreeWithUntrustedFrameGeometry(nsIFrame* aFrame)
|
|
{
|
|
InternalInvalidateThebesLayersInSubtree(aFrame, false);
|
|
}
|
|
|
|
/* static */ void
|
|
FrameLayerBuilder::InvalidateAllLayers(LayerManager* aManager)
|
|
{
|
|
LayerManagerData* data = static_cast<LayerManagerData*>
|
|
(aManager->GetUserData(&gLayerManagerUserData));
|
|
if (data) {
|
|
data->mInvalidateAllLayers = true;
|
|
}
|
|
}
|
|
|
|
/* static */
|
|
Layer*
|
|
FrameLayerBuilder::GetDedicatedLayer(nsIFrame* aFrame, uint32_t aDisplayItemKey)
|
|
{
|
|
nsTArray<DisplayItemData>* array = GetDisplayItemDataArrayForFrame(aFrame);
|
|
if (!array)
|
|
return nullptr;
|
|
|
|
for (uint32_t i = 0; i < array->Length(); ++i) {
|
|
if (array->ElementAt(i).mDisplayItemKey == aDisplayItemKey) {
|
|
Layer* layer = array->ElementAt(i).mLayer;
|
|
if (!layer->HasUserData(&gColorLayerUserData) &&
|
|
!layer->HasUserData(&gImageLayerUserData) &&
|
|
!layer->HasUserData(&gThebesDisplayItemLayerUserData))
|
|
return layer;
|
|
}
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
static gfxSize
|
|
PredictScaleForContent(nsIFrame* aFrame, nsIFrame* aAncestorWithScale,
|
|
const gfxSize& aScale)
|
|
{
|
|
gfx3DMatrix transform =
|
|
gfx3DMatrix::ScalingMatrix(aScale.width, aScale.height, 1.0);
|
|
// aTransform is applied first, then the scale is applied to the result
|
|
transform = nsLayoutUtils::GetTransformToAncestor(aFrame, aAncestorWithScale)*transform;
|
|
gfxMatrix transform2d;
|
|
if (transform.CanDraw2D(&transform2d)) {
|
|
return transform2d.ScaleFactors(true);
|
|
}
|
|
return gfxSize(1.0, 1.0);
|
|
}
|
|
|
|
gfxSize
|
|
FrameLayerBuilder::GetThebesLayerScaleForFrame(nsIFrame* aFrame)
|
|
{
|
|
nsIFrame* last;
|
|
for (nsIFrame* f = aFrame; f; f = nsLayoutUtils::GetCrossDocParentFrame(f)) {
|
|
last = f;
|
|
if (f->GetStateBits() & NS_FRAME_HAS_CONTAINER_LAYER) {
|
|
nsTArray<DisplayItemData>* array = GetDisplayItemDataArrayForFrame(f);
|
|
// Some frames with NS_FRAME_HAS_CONTAINER_LAYER may not have display items.
|
|
// In particular the root frame probably doesn't!
|
|
if (!array)
|
|
continue;
|
|
for (uint32_t i = 0; i < array->Length(); ++i) {
|
|
Layer* layer = array->ElementAt(i).mLayer;
|
|
ContainerLayer* container = layer->AsContainerLayer();
|
|
if (!container) {
|
|
continue;
|
|
}
|
|
for (Layer* l = container->GetFirstChild(); l; l = l->GetNextSibling()) {
|
|
ThebesDisplayItemLayerUserData* data =
|
|
static_cast<ThebesDisplayItemLayerUserData*>
|
|
(l->GetUserData(&gThebesDisplayItemLayerUserData));
|
|
if (data) {
|
|
return PredictScaleForContent(aFrame, f, gfxSize(data->mXScale, data->mYScale));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return PredictScaleForContent(aFrame, last,
|
|
last->PresContext()->PresShell()->GetResolution());
|
|
}
|
|
|
|
#ifdef MOZ_DUMP_PAINTING
|
|
static void DebugPaintItem(nsRenderingContext* aDest, nsDisplayItem *aItem, nsDisplayListBuilder* aBuilder)
|
|
{
|
|
bool snap;
|
|
nsRect appUnitBounds = aItem->GetBounds(aBuilder, &snap);
|
|
gfxRect bounds(appUnitBounds.x, appUnitBounds.y, appUnitBounds.width, appUnitBounds.height);
|
|
bounds.ScaleInverse(aDest->AppUnitsPerDevPixel());
|
|
|
|
nsRefPtr<gfxASurface> surf =
|
|
gfxPlatform::GetPlatform()->CreateOffscreenSurface(gfxIntSize(bounds.width, bounds.height),
|
|
gfxASurface::CONTENT_COLOR_ALPHA);
|
|
surf->SetDeviceOffset(-bounds.TopLeft());
|
|
nsRefPtr<gfxContext> context = new gfxContext(surf);
|
|
nsRefPtr<nsRenderingContext> ctx = new nsRenderingContext();
|
|
ctx->Init(aDest->DeviceContext(), context);
|
|
|
|
aItem->Paint(aBuilder, ctx);
|
|
DumpPaintedImage(aItem, surf);
|
|
aItem->SetPainted();
|
|
|
|
surf->SetDeviceOffset(gfxPoint(0, 0));
|
|
aDest->ThebesContext()->SetSource(surf, bounds.TopLeft());
|
|
aDest->ThebesContext()->Rectangle(bounds);
|
|
aDest->ThebesContext()->Fill();
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* A note on residual transforms:
|
|
*
|
|
* In a transformed subtree we sometimes apply the ThebesLayer's
|
|
* "residual transform" when drawing content into the ThebesLayer.
|
|
* 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 ThebesLayer 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 ThebesLayer 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::DrawThebesLayer(ThebesLayer* aLayer,
|
|
gfxContext* aContext,
|
|
const nsIntRegion& aRegionToDraw,
|
|
const nsIntRegion& aRegionToInvalidate,
|
|
void* aCallbackData)
|
|
{
|
|
SAMPLE_LABEL("gfx", "DrawThebesLayer");
|
|
|
|
nsDisplayListBuilder* builder = static_cast<nsDisplayListBuilder*>
|
|
(aCallbackData);
|
|
|
|
FrameLayerBuilder *layerBuilder = aLayer->Manager()->GetLayerBuilder();
|
|
|
|
if (layerBuilder->CheckDOMModified())
|
|
return;
|
|
|
|
nsTArray<ClippedDisplayItem> items;
|
|
uint32_t commonClipCount;
|
|
nsIFrame* containerLayerFrame;
|
|
{
|
|
ThebesLayerItemsEntry* entry = layerBuilder->mThebesLayerItems.GetEntry(aLayer);
|
|
NS_ASSERTION(entry, "We shouldn't be drawing into a layer with no items!");
|
|
items.SwapElements(entry->mItems);
|
|
commonClipCount = entry->mCommonClipCount;
|
|
containerLayerFrame = entry->mContainerLayerFrame;
|
|
// Later after this point, due to calls to DidEndTransaction
|
|
// for temporary layer managers, mThebesLayerItems can change,
|
|
// so 'entry' could become invalid.
|
|
}
|
|
|
|
if (!containerLayerFrame) {
|
|
return;
|
|
}
|
|
|
|
ThebesDisplayItemLayerUserData* userData =
|
|
static_cast<ThebesDisplayItemLayerUserData*>
|
|
(aLayer->GetUserData(&gThebesDisplayItemLayerUserData));
|
|
NS_ASSERTION(userData, "where did our user data go?");
|
|
if (NS_GET_A(userData->mForcedBackgroundColor) > 0) {
|
|
nsIntRect r = aLayer->GetVisibleRegion().GetBounds();
|
|
aContext->NewPath();
|
|
aContext->Rectangle(gfxRect(r.x, r.y, r.width, r.height));
|
|
aContext->SetColor(gfxRGBA(userData->mForcedBackgroundColor));
|
|
aContext->Fill();
|
|
}
|
|
|
|
// make the origin of the context coincide with the origin of the
|
|
// ThebesLayer
|
|
gfxContextMatrixAutoSaveRestore saveMatrix(aContext);
|
|
nsIntPoint offset = GetTranslationForThebesLayer(aLayer);
|
|
// 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->Translate(aLayer->GetResidualTranslation() - gfxPoint(offset.x, offset.y));
|
|
aContext->Scale(userData->mXScale, userData->mYScale);
|
|
|
|
nsPresContext* presContext = containerLayerFrame->PresContext();
|
|
int32_t appUnitsPerDevPixel = presContext->AppUnitsPerDevPixel();
|
|
if (!aRegionToInvalidate.IsEmpty()) {
|
|
nsRect r = (aRegionToInvalidate.GetBounds() + offset).
|
|
ToAppUnits(appUnitsPerDevPixel);
|
|
r.ScaleInverseRoundOut(userData->mXScale, userData->mYScale);
|
|
containerLayerFrame->InvalidateWithFlags(r,
|
|
nsIFrame::INVALIDATE_NO_THEBES_LAYERS |
|
|
nsIFrame::INVALIDATE_EXCLUDE_CURRENT_PAINT);
|
|
}
|
|
|
|
uint32_t i;
|
|
// Update visible regions. We need perform visibility analysis again
|
|
// because we may be asked to draw into part of a ThebesLayer that
|
|
// isn't actually visible in the window (e.g., because a ThebesLayer
|
|
// expanded its visible region to a rectangle internally), in which
|
|
// case the mVisibleRect stored in the display item may be wrong.
|
|
nsRegion visible = aRegionToDraw.ToAppUnits(appUnitsPerDevPixel);
|
|
visible.MoveBy(NSIntPixelsToAppUnits(offset.x, appUnitsPerDevPixel),
|
|
NSIntPixelsToAppUnits(offset.y, appUnitsPerDevPixel));
|
|
visible.ScaleInverseRoundOut(userData->mXScale, userData->mYScale);
|
|
|
|
for (i = items.Length(); i > 0; --i) {
|
|
ClippedDisplayItem* cdi = &items[i - 1];
|
|
|
|
NS_ASSERTION(AppUnitsPerDevPixel(cdi->mItem) == appUnitsPerDevPixel,
|
|
"a thebes layer should contain items only at the same zoom");
|
|
|
|
NS_ABORT_IF_FALSE(cdi->mClip.mHaveClipRect ||
|
|
cdi->mClip.mRoundedClipRects.IsEmpty(),
|
|
"If we have rounded rects, we must have a clip rect");
|
|
|
|
if (!cdi->mClip.mHaveClipRect ||
|
|
(cdi->mClip.mRoundedClipRects.IsEmpty() &&
|
|
cdi->mClip.mClipRect.Contains(visible.GetBounds()))) {
|
|
cdi->mItem->RecomputeVisibility(builder, &visible);
|
|
continue;
|
|
}
|
|
|
|
// Do a little dance to account for the fact that we're clipping
|
|
// to cdi->mClipRect
|
|
nsRegion clipped;
|
|
clipped.And(visible, cdi->mClip.mClipRect);
|
|
nsRegion finalClipped = clipped;
|
|
cdi->mItem->RecomputeVisibility(builder, &finalClipped);
|
|
// If we have rounded clip rects, don't subtract from the visible
|
|
// region since we aren't displaying everything inside the rect.
|
|
if (cdi->mClip.mRoundedClipRects.IsEmpty()) {
|
|
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;
|
|
}
|
|
}
|
|
if (!cdi->mClip.IsRectClippedByRoundedCorner(cdi->mItem->GetVisibleRect())) {
|
|
cdi->mClip.RemoveRoundedCorners();
|
|
}
|
|
}
|
|
|
|
nsRefPtr<nsRenderingContext> rc = new nsRenderingContext();
|
|
rc->Init(presContext->DeviceContext(), aContext);
|
|
|
|
Clip currentClip;
|
|
bool setClipRect = false;
|
|
|
|
for (i = 0; i < items.Length(); ++i) {
|
|
ClippedDisplayItem* cdi = &items[i];
|
|
|
|
if (cdi->mItem->GetVisibleRect().IsEmpty())
|
|
continue;
|
|
|
|
// If the new desired clip state is different from the current state,
|
|
// update the clip.
|
|
if (setClipRect != cdi->mClip.mHaveClipRect ||
|
|
(cdi->mClip.mHaveClipRect && cdi->mClip != currentClip)) {
|
|
if (setClipRect) {
|
|
aContext->Restore();
|
|
}
|
|
setClipRect = cdi->mClip.mHaveClipRect;
|
|
if (setClipRect) {
|
|
currentClip = cdi->mClip;
|
|
aContext->Save();
|
|
NS_ASSERTION(commonClipCount < 100,
|
|
"Maybe you really do have more than a hundred clipping rounded rects, or maybe something has gone wrong.");
|
|
currentClip.ApplyTo(aContext, presContext, commonClipCount);
|
|
}
|
|
}
|
|
|
|
if (cdi->mInactiveLayer) {
|
|
PaintInactiveLayer(builder, cdi->mItem, aContext, rc, layerBuilder);
|
|
} else {
|
|
nsIFrame* frame = cdi->mItem->GetUnderlyingFrame();
|
|
if (frame) {
|
|
frame->AddStateBits(NS_FRAME_PAINTED_THEBES);
|
|
}
|
|
#ifdef MOZ_DUMP_PAINTING
|
|
|
|
if (gfxUtils::sDumpPainting) {
|
|
DebugPaintItem(rc, cdi->mItem, builder);
|
|
} else {
|
|
#else
|
|
{
|
|
#endif
|
|
cdi->mItem->Paint(builder, rc);
|
|
}
|
|
}
|
|
|
|
if (layerBuilder->CheckDOMModified())
|
|
break;
|
|
}
|
|
|
|
{
|
|
ThebesLayerItemsEntry* entry =
|
|
layerBuilder->mThebesLayerItems.GetEntry(aLayer);
|
|
items.SwapElements(entry->mItems);
|
|
}
|
|
|
|
if (setClipRect) {
|
|
aContext->Restore();
|
|
}
|
|
|
|
FlashPaint(aContext);
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
#ifdef MOZ_DUMP_PAINTING
|
|
/* static */ void
|
|
FrameLayerBuilder::DumpRetainedLayerTree(LayerManager* aManager, FILE* aFile, bool aDumpHtml)
|
|
{
|
|
aManager->Dump(aFile, "", aDumpHtml);
|
|
}
|
|
#endif
|
|
|
|
FrameLayerBuilder::Clip::Clip(const Clip& aOther, nsDisplayItem* aClipItem)
|
|
: mRoundedClipRects(aOther.mRoundedClipRects),
|
|
mHaveClipRect(true)
|
|
{
|
|
nsDisplayItem::Type type = aClipItem->GetType();
|
|
NS_ABORT_IF_FALSE(type == nsDisplayItem::TYPE_CLIP ||
|
|
type == nsDisplayItem::TYPE_CLIP_ROUNDED_RECT,
|
|
"unexpected display item type");
|
|
nsDisplayClip* item = static_cast<nsDisplayClip*>(aClipItem);
|
|
// Always intersect with mClipRect, even if we're going to add a
|
|
// rounded rect.
|
|
if (aOther.mHaveClipRect) {
|
|
mClipRect.IntersectRect(aOther.mClipRect, item->GetClipRect());
|
|
} else {
|
|
mClipRect = item->GetClipRect();
|
|
}
|
|
|
|
if (type == nsDisplayItem::TYPE_CLIP_ROUNDED_RECT) {
|
|
RoundedRect *rr = mRoundedClipRects.AppendElement();
|
|
if (rr) {
|
|
rr->mRect = item->GetClipRect();
|
|
static_cast<nsDisplayClipRoundedRect*>(item)->GetRadii(rr->mRadii);
|
|
}
|
|
}
|
|
|
|
// FIXME: Optimize away excess rounded rectangles due to the new addition.
|
|
}
|
|
|
|
void
|
|
FrameLayerBuilder::Clip::ApplyTo(gfxContext* aContext,
|
|
nsPresContext* aPresContext,
|
|
uint32_t aBegin, uint32_t aEnd)
|
|
{
|
|
int32_t A2D = aPresContext->AppUnitsPerDevPixel();
|
|
ApplyRectTo(aContext, A2D);
|
|
ApplyRoundedRectsTo(aContext, A2D, aBegin, aEnd);
|
|
}
|
|
|
|
void
|
|
FrameLayerBuilder::Clip::ApplyRectTo(gfxContext* aContext, int32_t A2D) const
|
|
{
|
|
aContext->NewPath();
|
|
gfxRect clip = nsLayoutUtils::RectToGfxRect(mClipRect, A2D);
|
|
aContext->Rectangle(clip, true);
|
|
aContext->Clip();
|
|
}
|
|
|
|
void
|
|
FrameLayerBuilder::Clip::ApplyRoundedRectsTo(gfxContext* aContext,
|
|
int32_t A2D,
|
|
uint32_t aBegin, uint32_t aEnd) const
|
|
{
|
|
aEnd = NS_MIN<uint32_t>(aEnd, mRoundedClipRects.Length());
|
|
|
|
for (uint32_t i = aBegin; i < aEnd; ++i) {
|
|
AddRoundedRectPathTo(aContext, A2D, mRoundedClipRects[i]);
|
|
aContext->Clip();
|
|
}
|
|
}
|
|
|
|
void
|
|
FrameLayerBuilder::Clip::DrawRoundedRectsTo(gfxContext* aContext,
|
|
int32_t A2D,
|
|
uint32_t aBegin, uint32_t aEnd) const
|
|
{
|
|
aEnd = NS_MIN<uint32_t>(aEnd, mRoundedClipRects.Length());
|
|
|
|
if (aEnd - aBegin == 0)
|
|
return;
|
|
|
|
// If there is just one rounded rect we can just fill it, if there are more then we
|
|
// must clip the rest to get the intersection of clips
|
|
ApplyRoundedRectsTo(aContext, A2D, aBegin, aEnd - 1);
|
|
AddRoundedRectPathTo(aContext, A2D, mRoundedClipRects[aEnd - 1]);
|
|
aContext->Fill();
|
|
}
|
|
|
|
void
|
|
FrameLayerBuilder::Clip::AddRoundedRectPathTo(gfxContext* aContext,
|
|
int32_t A2D,
|
|
const RoundedRect &aRoundRect) const
|
|
{
|
|
gfxCornerSizes pixelRadii;
|
|
nsCSSRendering::ComputePixelRadii(aRoundRect.mRadii, A2D, &pixelRadii);
|
|
|
|
gfxRect clip = nsLayoutUtils::RectToGfxRect(aRoundRect.mRect, A2D);
|
|
clip.Round();
|
|
clip.Condition();
|
|
|
|
aContext->NewPath();
|
|
aContext->RoundedRectangle(clip, pixelRadii);
|
|
}
|
|
|
|
nsRect
|
|
FrameLayerBuilder::Clip::ApproximateIntersect(const nsRect& aRect) const
|
|
{
|
|
nsRect r = aRect;
|
|
if (mHaveClipRect) {
|
|
r.IntersectRect(r, mClipRect);
|
|
}
|
|
for (uint32_t i = 0, iEnd = mRoundedClipRects.Length();
|
|
i < iEnd; ++i) {
|
|
const Clip::RoundedRect &rr = mRoundedClipRects[i];
|
|
nsRegion rgn = nsLayoutUtils::RoundedRectIntersectRect(rr.mRect, rr.mRadii, r);
|
|
r = rgn.GetLargestRectangle();
|
|
}
|
|
return r;
|
|
}
|
|
|
|
// Test if (aXPoint, aYPoint) is in the ellipse with center (aXCenter, aYCenter)
|
|
// and radii aXRadius, aYRadius.
|
|
bool IsInsideEllipse(nscoord aXRadius, nscoord aXCenter, nscoord aXPoint,
|
|
nscoord aYRadius, nscoord aYCenter, nscoord aYPoint)
|
|
{
|
|
float scaledX = float(aXPoint - aXCenter) / float(aXRadius);
|
|
float scaledY = float(aYPoint - aYCenter) / float(aYRadius);
|
|
return scaledX * scaledX + scaledY * scaledY < 1.0f;
|
|
}
|
|
|
|
bool
|
|
FrameLayerBuilder::Clip::IsRectClippedByRoundedCorner(const nsRect& aRect) const
|
|
{
|
|
if (mRoundedClipRects.IsEmpty())
|
|
return false;
|
|
|
|
nsRect rect;
|
|
rect.IntersectRect(aRect, NonRoundedIntersection());
|
|
for (uint32_t i = 0, iEnd = mRoundedClipRects.Length();
|
|
i < iEnd; ++i) {
|
|
const Clip::RoundedRect &rr = mRoundedClipRects[i];
|
|
// top left
|
|
if (rect.x < rr.mRect.x + rr.mRadii[NS_CORNER_TOP_LEFT_X] &&
|
|
rect.y < rr.mRect.y + rr.mRadii[NS_CORNER_TOP_LEFT_Y]) {
|
|
if (!IsInsideEllipse(rr.mRadii[NS_CORNER_TOP_LEFT_X],
|
|
rr.mRect.x + rr.mRadii[NS_CORNER_TOP_LEFT_X],
|
|
rect.x,
|
|
rr.mRadii[NS_CORNER_TOP_LEFT_Y],
|
|
rr.mRect.y + rr.mRadii[NS_CORNER_TOP_LEFT_Y],
|
|
rect.y)) {
|
|
return true;
|
|
}
|
|
}
|
|
// top right
|
|
if (rect.XMost() > rr.mRect.XMost() - rr.mRadii[NS_CORNER_TOP_RIGHT_X] &&
|
|
rect.y < rr.mRect.y + rr.mRadii[NS_CORNER_TOP_RIGHT_Y]) {
|
|
if (!IsInsideEllipse(rr.mRadii[NS_CORNER_TOP_RIGHT_X],
|
|
rr.mRect.XMost() - rr.mRadii[NS_CORNER_TOP_RIGHT_X],
|
|
rect.XMost(),
|
|
rr.mRadii[NS_CORNER_TOP_RIGHT_Y],
|
|
rr.mRect.y + rr.mRadii[NS_CORNER_TOP_RIGHT_Y],
|
|
rect.y)) {
|
|
return true;
|
|
}
|
|
}
|
|
// bottom left
|
|
if (rect.x < rr.mRect.x + rr.mRadii[NS_CORNER_BOTTOM_LEFT_X] &&
|
|
rect.YMost() > rr.mRect.YMost() - rr.mRadii[NS_CORNER_BOTTOM_LEFT_Y]) {
|
|
if (!IsInsideEllipse(rr.mRadii[NS_CORNER_BOTTOM_LEFT_X],
|
|
rr.mRect.x + rr.mRadii[NS_CORNER_BOTTOM_LEFT_X],
|
|
rect.x,
|
|
rr.mRadii[NS_CORNER_BOTTOM_LEFT_Y],
|
|
rr.mRect.YMost() - rr.mRadii[NS_CORNER_BOTTOM_LEFT_Y],
|
|
rect.YMost())) {
|
|
return true;
|
|
}
|
|
}
|
|
// bottom right
|
|
if (rect.XMost() > rr.mRect.XMost() - rr.mRadii[NS_CORNER_BOTTOM_RIGHT_X] &&
|
|
rect.YMost() > rr.mRect.YMost() - rr.mRadii[NS_CORNER_BOTTOM_RIGHT_Y]) {
|
|
if (!IsInsideEllipse(rr.mRadii[NS_CORNER_BOTTOM_RIGHT_X],
|
|
rr.mRect.XMost() - rr.mRadii[NS_CORNER_BOTTOM_RIGHT_X],
|
|
rect.XMost(),
|
|
rr.mRadii[NS_CORNER_BOTTOM_RIGHT_Y],
|
|
rr.mRect.YMost() - rr.mRadii[NS_CORNER_BOTTOM_RIGHT_Y],
|
|
rect.YMost())) {
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
nsRect
|
|
FrameLayerBuilder::Clip::NonRoundedIntersection() const
|
|
{
|
|
nsRect result = mClipRect;
|
|
for (uint32_t i = 0, iEnd = mRoundedClipRects.Length();
|
|
i < iEnd; ++i) {
|
|
result.IntersectRect(result, mRoundedClipRects[i].mRect);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
void
|
|
FrameLayerBuilder::Clip::RemoveRoundedCorners()
|
|
{
|
|
if (mRoundedClipRects.IsEmpty())
|
|
return;
|
|
|
|
mClipRect = NonRoundedIntersection();
|
|
mRoundedClipRects.Clear();
|
|
}
|
|
|
|
gfxRect
|
|
CalculateBounds(const nsTArray<FrameLayerBuilder::Clip::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 nsLayoutUtils::RectToGfxRect(bounds, A2D);
|
|
}
|
|
|
|
static void
|
|
SetClipCount(ThebesDisplayItemLayerUserData* aThebesData,
|
|
uint32_t aClipCount)
|
|
{
|
|
if (aThebesData) {
|
|
aThebesData->mMaskClipCount = aClipCount;
|
|
}
|
|
}
|
|
|
|
void
|
|
ContainerState::SetupMaskLayer(Layer *aLayer, const FrameLayerBuilder::Clip& aClip,
|
|
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.
|
|
ThebesDisplayItemLayerUserData* thebesData = GetThebesDisplayItemLayerUserData(aLayer);
|
|
if (thebesData &&
|
|
aRoundedRectClipCount < thebesData->mMaskClipCount) {
|
|
ThebesLayer* thebes = aLayer->AsThebesLayer();
|
|
thebes->InvalidateRegion(thebes->GetValidRegion().GetBounds());
|
|
}
|
|
|
|
// don't build an unnecessary mask
|
|
nsIntRect layerBounds = aLayer->GetVisibleRegion().GetBounds();
|
|
if (aClip.mRoundedClipRects.IsEmpty() ||
|
|
aRoundedRectClipCount == 0 ||
|
|
layerBounds.IsEmpty()) {
|
|
SetClipCount(thebesData, 0);
|
|
return;
|
|
}
|
|
|
|
// check if we can re-use the mask layer
|
|
nsRefPtr<ImageLayer> maskLayer = CreateOrRecycleMaskImageLayerFor(aLayer);
|
|
MaskLayerUserData* userData = GetMaskLayerUserData(maskLayer);
|
|
|
|
MaskLayerUserData newData;
|
|
newData.mRoundedClipRects.AppendElements(aClip.mRoundedClipRects);
|
|
if (aRoundedRectClipCount < newData.mRoundedClipRects.Length()) {
|
|
newData.mRoundedClipRects.TruncateLength(aRoundedRectClipCount);
|
|
}
|
|
newData.mScaleX = mParameters.mXScale;
|
|
newData.mScaleY = mParameters.mYScale;
|
|
|
|
if (*userData == newData) {
|
|
aLayer->SetMaskLayer(maskLayer);
|
|
SetClipCount(thebesData, aRoundedRectClipCount);
|
|
return;
|
|
}
|
|
|
|
// calculate a more precise bounding rect
|
|
const int32_t A2D = mContainerFrame->PresContext()->AppUnitsPerDevPixel();
|
|
gfxRect boundingRect = CalculateBounds(newData.mRoundedClipRects, A2D);
|
|
boundingRect.Scale(mParameters.mXScale, mParameters.mYScale);
|
|
|
|
uint32_t maxSize = mManager->GetMaxTextureSize();
|
|
NS_ASSERTION(maxSize > 0, "Invalid max texture size");
|
|
nsIntSize surfaceSize(NS_MIN<int32_t>(boundingRect.Width(), maxSize),
|
|
NS_MIN<int32_t>(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
|
|
gfxMatrix maskTransform;
|
|
maskTransform.Scale(float(surfaceSize.width)/float(boundingRect.Width()),
|
|
float(surfaceSize.height)/float(boundingRect.Height()));
|
|
maskTransform.Translate(-boundingRect.TopLeft());
|
|
// imageTransform is only used when the clip is painted to the mask
|
|
gfxMatrix imageTransform = maskTransform;
|
|
imageTransform.Scale(mParameters.mXScale, mParameters.mYScale);
|
|
|
|
nsAutoPtr<MaskLayerImageCache::MaskLayerImageKey> newKey(
|
|
new MaskLayerImageCache::MaskLayerImageKey(aLayer->Manager()->GetBackendType()));
|
|
|
|
// 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);
|
|
}
|
|
|
|
const MaskLayerImageCache::MaskLayerImageKey* lookupKey = newKey;
|
|
|
|
// check to see if we can reuse a mask image
|
|
nsRefPtr<ImageContainer> container =
|
|
GetMaskLayerImageCache()->FindImageFor(&lookupKey);
|
|
|
|
if (!container) {
|
|
// no existing mask image, so build a new one
|
|
nsRefPtr<gfxASurface> surface =
|
|
aLayer->Manager()->CreateOptimalMaskSurface(surfaceSize);
|
|
|
|
// fail if we can't get the right surface
|
|
if (!surface || surface->CairoStatus()) {
|
|
NS_WARNING("Could not create surface for mask layer.");
|
|
SetClipCount(thebesData, 0);
|
|
return;
|
|
}
|
|
|
|
nsRefPtr<gfxContext> context = new gfxContext(surface);
|
|
context->Multiply(imageTransform);
|
|
|
|
// paint the clipping rects with alpha to create the mask
|
|
context->SetColor(gfxRGBA(1, 1, 1, 1));
|
|
aClip.DrawRoundedRectsTo(context, A2D, 0, aRoundedRectClipCount);
|
|
|
|
// build the image and container
|
|
container = aLayer->Manager()->CreateImageContainer();
|
|
NS_ASSERTION(container, "Could not create image container for mask layer.");
|
|
static const ImageFormat format = CAIRO_SURFACE;
|
|
nsRefPtr<Image> image = container->CreateImage(&format, 1);
|
|
NS_ASSERTION(image, "Could not create image container for mask layer.");
|
|
CairoImage::Data data;
|
|
data.mSurface = surface;
|
|
data.mSize = surfaceSize;
|
|
static_cast<CairoImage*>(image.get())->SetData(data);
|
|
container->SetCurrentImageInTransaction(image);
|
|
|
|
GetMaskLayerImageCache()->PutImage(newKey.forget(), container);
|
|
}
|
|
|
|
maskLayer->SetContainer(container);
|
|
|
|
gfx3DMatrix matrix = gfx3DMatrix::From2D(maskTransform.Invert());
|
|
matrix.Translate(gfxPoint3D(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->mRoundedClipRects.SwapElements(newData.mRoundedClipRects);
|
|
userData->mImageKey = lookupKey;
|
|
|
|
aLayer->SetMaskLayer(maskLayer);
|
|
SetClipCount(thebesData, aRoundedRectClipCount);
|
|
return;
|
|
}
|
|
|
|
} // namespace mozilla
|