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Diffstat (limited to '')
| -rw-r--r-- | gfx/layers/composite/ContainerLayerComposite.cpp | 820 |
1 files changed, 820 insertions, 0 deletions
diff --git a/gfx/layers/composite/ContainerLayerComposite.cpp b/gfx/layers/composite/ContainerLayerComposite.cpp new file mode 100644 index 0000000000..34b91714e0 --- /dev/null +++ b/gfx/layers/composite/ContainerLayerComposite.cpp @@ -0,0 +1,820 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#include "ContainerLayerComposite.h" +#include <algorithm> // for min +#include "FrameMetrics.h" // for FrameMetrics +#include "Units.h" // for LayerRect, LayerPixel, etc +#include "CompositableHost.h" // for CompositableHost +#include "gfxEnv.h" // for gfxEnv +#include "mozilla/Assertions.h" // for MOZ_ASSERT, etc +#include "mozilla/RefPtr.h" // for RefPtr +#include "mozilla/StaticPrefs_apz.h" +#include "mozilla/StaticPrefs_layers.h" +#include "mozilla/UniquePtr.h" // for UniquePtr +#include "mozilla/gfx/BaseRect.h" // for BaseRect +#include "mozilla/gfx/Matrix.h" // for Matrix4x4 +#include "mozilla/gfx/Point.h" // for Point, IntPoint +#include "mozilla/gfx/Rect.h" // for IntRect, Rect +#include "mozilla/layers/APZSampler.h" // for APZSampler +#include "mozilla/layers/BSPTree.h" +#include "mozilla/layers/Compositor.h" // for Compositor, etc +#include "mozilla/layers/CompositorBridgeParent.h" // for CompositorBridgeParent +#include "mozilla/layers/CompositorTypes.h" // for DiagnosticFlags::CONTAINER +#include "mozilla/layers/Effects.h" // for Effect, EffectChain, etc +#include "mozilla/layers/TextureHost.h" // for CompositingRenderTarget +#include "mozilla/layers/APZUtils.h" // for AsyncTransform +#include "mozilla/layers/LayerManagerCompositeUtils.h" +#include "mozilla/layers/LayerMetricsWrapper.h" // for LayerMetricsWrapper +#include "mozilla/layers/LayersHelpers.h" +#include "mozilla/mozalloc.h" // for operator delete, etc +#include "mozilla/RefPtr.h" // for nsRefPtr +#include "nsDebug.h" // for NS_ASSERTION +#include "nsISupportsImpl.h" // for MOZ_COUNT_CTOR, etc +#include "nsISupportsUtils.h" // for NS_ADDREF, NS_RELEASE +#include "nsRegion.h" // for nsIntRegion +#include "nsTArray.h" // for AutoTArray +#include <stack> +#include "TextRenderer.h" // for TextRenderer +#include <vector> +#include "GeckoProfiler.h" // for GeckoProfiler + +static mozilla::LazyLogModule sGfxCullLog("gfx.culling"); +#define CULLING_LOG(...) MOZ_LOG(sGfxCullLog, LogLevel::Debug, (__VA_ARGS__)) + +#define DUMP(...) \ + do { \ + if (gfxEnv::DumpDebug()) { \ + printf_stderr(__VA_ARGS__); \ + } \ + } while (0) +#define XYWH(k) (k).X(), (k).Y(), (k).Width(), (k).Height() +#define XY(k) (k).X(), (k).Y() +#define WH(k) (k).Width(), (k).Height() + +namespace mozilla { +namespace layers { + +using namespace gfx; + +static void DrawLayerInfo(const RenderTargetIntRect& aClipRect, + LayerManagerComposite* aManager, Layer* aLayer) { + if (aLayer->GetType() == Layer::LayerType::TYPE_CONTAINER) { + // XXX - should figure out a way to render this, but for now this + // is hard to do, since it will often get superimposed over the first + // child of the layer, which is bad. + return; + } + + std::stringstream ss; + aLayer->PrintInfo(ss, ""); + + LayerIntRegion visibleRegion = aLayer->GetVisibleRegion(); + + uint32_t maxWidth = + std::min<uint32_t>(visibleRegion.GetBounds().Width(), 500); + + IntPoint topLeft = visibleRegion.GetBounds().ToUnknownRect().TopLeft(); + aManager->GetTextRenderer()->RenderText( + aManager->GetCompositor(), ss.str().c_str(), topLeft, + aLayer->GetEffectiveTransform(), 16, maxWidth); +} + +static void PrintUniformityInfo(Layer* aLayer) { +#if defined(MOZ_GECKO_PROFILER) + if (!profiler_thread_is_being_profiled()) { + return; + } + + // Don't want to print a log for smaller layers + if (aLayer->GetLocalVisibleRegion().GetBounds().Width() < 300 || + aLayer->GetLocalVisibleRegion().GetBounds().Height() < 300) { + return; + } + + Matrix4x4 transform = aLayer->AsHostLayer()->GetShadowBaseTransform(); + if (!transform.Is2D()) { + return; + } + + Point translation = transform.As2D().GetTranslation(); + + // Contains the translation applied to a 2d layer so we can track the layer + // position at each frame. + struct LayerTranslationMarker { + static constexpr Span<const char> MarkerTypeName() { + return MakeStringSpan("LayerTranslation"); + } + static void StreamJSONMarkerData( + baseprofiler::SpliceableJSONWriter& aWriter, + ProfileBufferRawPointer<layers::Layer> aLayer, gfx::Point aPoint) { + const size_t bufferSize = 32; + char buffer[bufferSize]; + SprintfLiteral(buffer, "%p", aLayer.mRawPointer); + + aWriter.StringProperty("layer", buffer); + aWriter.IntProperty("x", aPoint.x); + aWriter.IntProperty("y", aPoint.y); + } + static MarkerSchema MarkerTypeDisplay() { + using MS = MarkerSchema; + MS schema{MS::Location::markerChart, MS::Location::markerTable}; + schema.AddKeyLabelFormat("layer", "Layer", MS::Format::string); + schema.AddKeyLabelFormat("x", "X", MS::Format::integer); + schema.AddKeyLabelFormat("y", "Y", MS::Format::integer); + return schema; + } + }; + + profiler_add_marker("LayerTranslation", geckoprofiler::category::GRAPHICS, {}, + LayerTranslationMarker{}, + WrapProfileBufferRawPointer(aLayer), translation); +#endif +} + +static Maybe<gfx::Polygon> SelectLayerGeometry( + const Maybe<gfx::Polygon>& aParentGeometry, + const Maybe<gfx::Polygon>& aChildGeometry) { + // Both the parent and the child layer were split. + if (aParentGeometry && aChildGeometry) { + return Some(aParentGeometry->ClipPolygon(*aChildGeometry)); + } + + // The parent layer was split. + if (aParentGeometry) { + return aParentGeometry; + } + + // The child layer was split. + if (aChildGeometry) { + return aChildGeometry; + } + + // No split. + return Nothing(); +} + +void TransformLayerGeometry(Layer* aLayer, Maybe<gfx::Polygon>& aGeometry) { + Layer* parent = aLayer; + gfx::Matrix4x4 transform; + + // Collect all parent transforms. + while (parent != nullptr && !parent->Is3DContextLeaf()) { + transform = transform * parent->GetLocalTransform(); + parent = parent->GetParent(); + } + + // Transform the geometry to the parent 3D context leaf coordinate space. + transform = transform.ProjectTo2D(); + + if (!transform.IsSingular()) { + aGeometry->TransformToScreenSpace(transform.Inverse(), transform); + } else { + // Discard the geometry since the result might not be correct. + aGeometry.reset(); + } +} + +template <class ContainerT> +static gfx::IntRect ContainerVisibleRect(ContainerT* aContainer) { + gfx::IntRect surfaceRect = + aContainer->GetLocalVisibleRegion().GetBounds().ToUnknownRect(); + return surfaceRect; +} + +/* all of the per-layer prepared data we need to maintain */ +struct PreparedLayer { + PreparedLayer(Layer* aLayer, RenderTargetIntRect aClipRect, + Maybe<gfx::Polygon>&& aGeometry) + : mLayer(aLayer), mClipRect(aClipRect), mGeometry(std::move(aGeometry)) {} + + RefPtr<Layer> mLayer; + RenderTargetIntRect mClipRect; + Maybe<Polygon> mGeometry; +}; + +/* all of the prepared data that we need in RenderLayer() */ +struct PreparedData { + RefPtr<CompositingRenderTarget> mTmpTarget; + AutoTArray<PreparedLayer, 12> mLayers; + bool mNeedsSurfaceCopy; +}; + +// ContainerPrepare is shared between RefLayer and ContainerLayer +template <class ContainerT> +void ContainerPrepare(ContainerT* aContainer, LayerManagerComposite* aManager, + const RenderTargetIntRect& aClipRect) { + // We can end up calling prepare multiple times if we duplicated + // layers due to preserve-3d plane splitting. The results + // should be identical, so we only need to do it once. + if (aContainer->mPrepared) { + return; + } + aContainer->mPrepared = MakeUnique<PreparedData>(); + aContainer->mPrepared->mNeedsSurfaceCopy = false; + + const ContainerLayerComposite::SortMode sortMode = + aManager->GetCompositor()->SupportsLayerGeometry() + ? ContainerLayerComposite::SortMode::WITH_GEOMETRY + : ContainerLayerComposite::SortMode::WITHOUT_GEOMETRY; + + nsTArray<LayerPolygon> polygons = + aContainer->SortChildrenBy3DZOrder(sortMode); + + for (LayerPolygon& layer : polygons) { + LayerComposite* layerToRender = + static_cast<LayerComposite*>(layer.layer->ImplData()); + + RenderTargetIntRect clipRect = + layerToRender->GetLayer()->CalculateScissorRect(aClipRect); + + if (layerToRender->GetLayer()->IsBackfaceHidden()) { + continue; + } + + // We don't want to skip container layers because otherwise their mPrepared + // may be null which is not allowed. + if (!layerToRender->GetLayer()->AsContainerLayer()) { + if (!layerToRender->GetLayer()->IsVisible()) { + CULLING_LOG("Sublayer %p has no effective visible region\n", + layerToRender->GetLayer()); + continue; + } + + if (clipRect.IsEmpty()) { + CULLING_LOG("Sublayer %p has an empty world clip rect\n", + layerToRender->GetLayer()); + continue; + } + } + + CULLING_LOG("Preparing sublayer %p\n", layerToRender->GetLayer()); + + layerToRender->Prepare(clipRect); + aContainer->mPrepared->mLayers.AppendElement(PreparedLayer( + layerToRender->GetLayer(), clipRect, std::move(layer.geometry))); + } + + CULLING_LOG("Preparing container layer %p\n", aContainer->GetLayer()); + + /** + * Setup our temporary surface for rendering the contents of this container. + */ + + gfx::IntRect surfaceRect = ContainerVisibleRect(aContainer); + if (surfaceRect.IsEmpty()) { + return; + } + + bool surfaceCopyNeeded; + // DefaultComputeSupportsComponentAlphaChildren can mutate aContainer so call + // it unconditionally + aContainer->DefaultComputeSupportsComponentAlphaChildren(&surfaceCopyNeeded); + if (aContainer->UseIntermediateSurface()) { + if (!surfaceCopyNeeded) { + RefPtr<CompositingRenderTarget> surface = nullptr; + + RefPtr<CompositingRenderTarget>& lastSurf = + aContainer->mLastIntermediateSurface; + if (lastSurf && !aContainer->mChildrenChanged && + lastSurf->GetRect().IsEqualEdges(surfaceRect)) { + surface = lastSurf; + } + + if (!surface) { + // If we don't need a copy we can render to the intermediate now to + // avoid unecessary render target switching. This brings a big perf + // boost on mobile gpus. + surface = CreateOrRecycleTarget(aContainer, aManager); + + MOZ_PERFORMANCE_WARNING( + "gfx", + "[%p] Container layer requires intermediate surface rendering\n", + aContainer); + RenderIntermediate(aContainer, aManager, aClipRect.ToUnknownRect(), + surface); + aContainer->SetChildrenChanged(false); + } + + aContainer->mPrepared->mTmpTarget = surface; + } else { + MOZ_PERFORMANCE_WARNING( + "gfx", "[%p] Container layer requires intermediate surface copy\n", + aContainer); + aContainer->mPrepared->mNeedsSurfaceCopy = true; + aContainer->mLastIntermediateSurface = nullptr; + } + } else { + aContainer->mLastIntermediateSurface = nullptr; + } +} + +template <class ContainerT> +void RenderMinimap(ContainerT* aContainer, const RefPtr<APZSampler>& aSampler, + LayerManagerComposite* aManager, + const RenderTargetIntRect& aClipRect, Layer* aLayer) { + Compositor* compositor = aManager->GetCompositor(); + MOZ_ASSERT(aSampler); + + if (aLayer->GetScrollMetadataCount() < 1) { + return; + } + + LayerMetricsWrapper wrapper(aLayer, 0); + if (!wrapper.GetApzc()) { + return; + } + const FrameMetrics& fm = wrapper.Metrics(); + MOZ_ASSERT(fm.IsScrollable()); + + ParentLayerPoint scrollOffset = + aSampler->GetCurrentAsyncScrollOffset(wrapper); + + // Options + const int verticalPadding = 10; + const int horizontalPadding = 5; + gfx::DeviceColor backgroundColor(0.3f, 0.3f, 0.3f, 0.3f); + gfx::DeviceColor tileActiveColor(1, 1, 1, 0.4f); + gfx::DeviceColor tileBorderColor(0, 0, 0, 0.1f); + gfx::DeviceColor pageBorderColor(0, 0, 0); + gfx::DeviceColor criticalDisplayPortColor(1.f, 1.f, 0); + gfx::DeviceColor displayPortColor(0, 1.f, 0); + gfx::DeviceColor layoutPortColor(1.f, 0, 0); + gfx::DeviceColor visualPortColor(0, 0, 1.f, 0.3f); + + // Rects + ParentLayerRect compositionBounds = fm.GetCompositionBounds(); + LayerRect scrollRect = fm.GetScrollableRect() * fm.LayersPixelsPerCSSPixel(); + LayerRect visualRect = + ParentLayerRect(scrollOffset, compositionBounds.Size()) / + LayerToParentLayerScale(1); + LayerRect dp = (fm.GetDisplayPort() + fm.GetLayoutScrollOffset()) * + fm.LayersPixelsPerCSSPixel(); + Maybe<LayerRect> layoutRect; + Maybe<LayerRect> cdp; + if (fm.IsRootContent()) { + CSSRect viewport = aSampler->GetCurrentAsyncLayoutViewport(wrapper); + layoutRect = Some(viewport * fm.LayersPixelsPerCSSPixel()); + } + if (!fm.GetCriticalDisplayPort().IsEmpty()) { + cdp = Some((fm.GetCriticalDisplayPort() + fm.GetLayoutScrollOffset()) * + fm.LayersPixelsPerCSSPixel()); + } + + // Don't render trivial minimap. They can show up from textboxes and other + // tiny frames. + if (visualRect.Width() < 64 && visualRect.Height() < 64) { + return; + } + + // Compute a scale with an appropriate aspect ratio + // We allocate up to 100px of width and the height of this layer. + float scaleFactor; + float scaleFactorX; + float scaleFactorY; + Rect dest = Rect(aClipRect.ToUnknownRect()); + if (aLayer->GetLocalClipRect()) { + dest = Rect(aLayer->GetLocalClipRect().value().ToUnknownRect()); + } else { + dest = aContainer->GetEffectiveTransform().Inverse().TransformBounds(dest); + } + dest = dest.Intersect(compositionBounds.ToUnknownRect()); + scaleFactorX = std::min(100.f, dest.Width() - (2 * horizontalPadding)) / + scrollRect.Width(); + scaleFactorY = (dest.Height() - (2 * verticalPadding)) / scrollRect.Height(); + scaleFactor = std::min(scaleFactorX, scaleFactorY); + if (scaleFactor <= 0) { + return; + } + + Matrix4x4 transform = Matrix4x4::Scaling(scaleFactor, scaleFactor, 1); + transform.PostTranslate(horizontalPadding + dest.X(), + verticalPadding + dest.Y(), 0); + + Rect transformedScrollRect = + transform.TransformBounds(scrollRect.ToUnknownRect()); + + IntRect clipRect = + RoundedOut(aContainer->GetEffectiveTransform().TransformBounds( + transformedScrollRect)); + + // Render the scrollable area. + compositor->FillRect(transformedScrollRect, backgroundColor, clipRect, + aContainer->GetEffectiveTransform()); + compositor->SlowDrawRect(transformedScrollRect, pageBorderColor, clipRect, + aContainer->GetEffectiveTransform()); + + // Render the displayport. + Rect r = transform.TransformBounds(dp.ToUnknownRect()); + compositor->FillRect(r, tileActiveColor, clipRect, + aContainer->GetEffectiveTransform()); + compositor->SlowDrawRect(r, displayPortColor, clipRect, + aContainer->GetEffectiveTransform()); + + // Render the critical displayport if there is one + if (cdp) { + r = transform.TransformBounds(cdp->ToUnknownRect()); + compositor->SlowDrawRect(r, criticalDisplayPortColor, clipRect, + aContainer->GetEffectiveTransform()); + } + + // Render the layout viewport if it exists (which is only in the root + // content APZC). + if (layoutRect) { + r = transform.TransformBounds(layoutRect->ToUnknownRect()); + compositor->SlowDrawRect(r, layoutPortColor, clipRect, + aContainer->GetEffectiveTransform()); + } + + // Render the visual viewport. + r = transform.TransformBounds(visualRect.ToUnknownRect()); + compositor->SlowDrawRect(r, visualPortColor, clipRect, + aContainer->GetEffectiveTransform(), 2); +} + +template <class ContainerT> +void RenderLayers(ContainerT* aContainer, LayerManagerComposite* aManager, + const RenderTargetIntRect& aClipRect, + const Maybe<gfx::Polygon>& aGeometry) { + Compositor* compositor = aManager->GetCompositor(); + + RefPtr<APZSampler> sampler; + if (CompositorBridgeParent* cbp = compositor->GetCompositorBridgeParent()) { + sampler = cbp->GetAPZSampler(); + } + + for (size_t i = 0u; i < aContainer->mPrepared->mLayers.Length(); i++) { + PreparedLayer& preparedData = aContainer->mPrepared->mLayers[i]; + + const gfx::IntRect clipRect = preparedData.mClipRect.ToUnknownRect(); + LayerComposite* layerToRender = + static_cast<LayerComposite*>(preparedData.mLayer->ImplData()); + const Maybe<gfx::Polygon>& childGeometry = preparedData.mGeometry; + + Layer* layer = layerToRender->GetLayer(); + + if (layerToRender->HasStaleCompositor()) { + continue; + } + + if (StaticPrefs::layers_acceleration_draw_fps()) { + for (const auto& metadata : layer->GetAllScrollMetadata()) { + if (metadata.IsApzForceDisabled()) { + aManager->DisabledApzWarning(); + break; + } + } + } + + if (layerToRender->HasLayerBeenComposited()) { + // Composer2D will compose this layer so skip GPU composition + // this time. The flag will be reset for the next composition phase + // at the beginning of LayerManagerComposite::Rener(). + gfx::IntRect clearRect = layerToRender->GetClearRect(); + if (!clearRect.IsEmpty()) { + // Clear layer's visible rect on FrameBuffer with transparent pixels + gfx::Rect fbRect(clearRect.X(), clearRect.Y(), clearRect.Width(), + clearRect.Height()); + compositor->ClearRect(fbRect); + layerToRender->SetClearRect(gfx::IntRect(0, 0, 0, 0)); + } + } else { + // Since we force an intermediate surface for nested 3D contexts, + // aGeometry and childGeometry are both in the same coordinate space. + Maybe<gfx::Polygon> geometry = + SelectLayerGeometry(aGeometry, childGeometry); + + // If we are dealing with a nested 3D context, we might need to transform + // the geometry back to the coordinate space of the current layer before + // rendering the layer. + ContainerLayer* container = layer->AsContainerLayer(); + const bool isLeafLayer = + !container || container->UseIntermediateSurface(); + + if (geometry && isLeafLayer) { + TransformLayerGeometry(layer, geometry); + } + + layerToRender->RenderLayer(clipRect, geometry); + } + + if (StaticPrefs::layers_uniformity_info_AtStartup()) { + PrintUniformityInfo(layer); + } + + if (StaticPrefs::layers_draw_layer_info()) { + DrawLayerInfo(preparedData.mClipRect, aManager, layer); + } + + // Draw a border around scrollable layers. + // A layer can be scrolled by multiple scroll frames. Draw a border + // for each. + // Within the list of scroll frames for a layer, the layer border for a + // scroll frame lower down is affected by the async transforms on scroll + // frames higher up, so loop from the top down, and accumulate an async + // transform as we go along. + Matrix4x4 asyncTransform; + if (sampler) { + for (uint32_t i = layer->GetScrollMetadataCount(); i > 0; --i) { + LayerMetricsWrapper wrapper(layer, i - 1); + if (wrapper.GetApzc()) { + MOZ_ASSERT(wrapper.Metrics().IsScrollable()); + // Since the composition bounds are in the parent layer's coordinates, + // use the parent's effective transform rather than the layer's own. + ParentLayerRect compositionBounds = + wrapper.Metrics().GetCompositionBounds(); + aManager->GetCompositor()->DrawDiagnostics( + DiagnosticFlags::CONTAINER, compositionBounds.ToUnknownRect(), + aClipRect.ToUnknownRect(), + asyncTransform * aContainer->GetEffectiveTransform()); + asyncTransform = + sampler->GetCurrentAsyncTransformWithOverscroll(wrapper) + .ToUnknownMatrix() * + asyncTransform; + } + } + + if (StaticPrefs::apz_minimap_enabled()) { + RenderMinimap(aContainer, sampler, aManager, aClipRect, layer); + } + } + + // invariant: our GL context should be current here, I don't think we can + // assert it though + } +} + +template <class ContainerT> +RefPtr<CompositingRenderTarget> CreateOrRecycleTarget( + ContainerT* aContainer, LayerManagerComposite* aManager) { + Compositor* compositor = aManager->GetCompositor(); + SurfaceInitMode mode = INIT_MODE_CLEAR; + gfx::IntRect surfaceRect = ContainerVisibleRect(aContainer); + if (aContainer->GetLocalVisibleRegion().GetNumRects() == 1 && + (aContainer->GetContentFlags() & Layer::CONTENT_OPAQUE)) { + mode = INIT_MODE_NONE; + } + + RefPtr<CompositingRenderTarget>& lastSurf = + aContainer->mLastIntermediateSurface; + if (lastSurf && lastSurf->GetRect().IsEqualEdges(surfaceRect)) { + if (mode == INIT_MODE_CLEAR) { + lastSurf->ClearOnBind(); + } + + return lastSurf; + } else { + lastSurf = compositor->CreateRenderTarget(surfaceRect, mode); + + return lastSurf; + } +} + +template <class ContainerT> +RefPtr<CompositingRenderTarget> CreateTemporaryTargetAndCopyFromBackground( + ContainerT* aContainer, LayerManagerComposite* aManager) { + Compositor* compositor = aManager->GetCompositor(); + gfx::IntRect visibleRect = + aContainer->GetLocalVisibleRegion().GetBounds().ToUnknownRect(); + RefPtr<CompositingRenderTarget> previousTarget = + compositor->GetCurrentRenderTarget(); + gfx::IntRect surfaceRect = + gfx::IntRect(visibleRect.X(), visibleRect.Y(), visibleRect.Width(), + visibleRect.Height()); + + gfx::IntPoint sourcePoint = gfx::IntPoint(visibleRect.X(), visibleRect.Y()); + + gfx::Matrix4x4 transform = aContainer->GetEffectiveTransform(); + DebugOnly<gfx::Matrix> transform2d; + MOZ_ASSERT(transform.Is2D(&transform2d) && + !gfx::ThebesMatrix(transform2d).HasNonIntegerTranslation()); + sourcePoint += gfx::IntPoint::Truncate(transform._41, transform._42); + + sourcePoint -= previousTarget->GetOrigin(); + + return compositor->CreateRenderTargetFromSource(surfaceRect, previousTarget, + sourcePoint); +} + +template <class ContainerT> +void RenderIntermediate(ContainerT* aContainer, LayerManagerComposite* aManager, + const gfx::IntRect& aClipRect, + RefPtr<CompositingRenderTarget> surface) { + Compositor* compositor = aManager->GetCompositor(); + RefPtr<CompositingRenderTarget> previousTarget = + compositor->GetCurrentRenderTarget(); + + if (!surface) { + return; + } + + compositor->SetRenderTarget(surface); + // pre-render all of the layers into our temporary + RenderLayers(aContainer, aManager, + RenderTargetIntRect::FromUnknownRect(aClipRect), Nothing()); + + // Unbind the current surface and rebind the previous one. + compositor->SetRenderTarget(previousTarget); +} + +template <class ContainerT> +void ContainerRender(ContainerT* aContainer, LayerManagerComposite* aManager, + const gfx::IntRect& aClipRect, + const Maybe<gfx::Polygon>& aGeometry) { + MOZ_ASSERT(aContainer->mPrepared); + + if (aContainer->UseIntermediateSurface()) { + RefPtr<CompositingRenderTarget> surface; + + if (aContainer->mPrepared->mNeedsSurfaceCopy) { + // we needed to copy the background so we waited until now to render the + // intermediate + surface = + CreateTemporaryTargetAndCopyFromBackground(aContainer, aManager); + RenderIntermediate(aContainer, aManager, aClipRect, surface); + } else { + surface = aContainer->mPrepared->mTmpTarget; + } + + if (!surface) { + return; + } + + gfx::Rect visibleRect( + aContainer->GetLocalVisibleRegion().GetBounds().ToUnknownRect()); + + RefPtr<Compositor> compositor = aManager->GetCompositor(); +#ifdef MOZ_DUMP_PAINTING + if (gfxEnv::DumpCompositorTextures()) { + RefPtr<gfx::DataSourceSurface> surf = surface->Dump(compositor); + if (surf) { + WriteSnapshotToDumpFile(aContainer, surf); + } + } +#endif + + RefPtr<ContainerT> container = aContainer; + RenderWithAllMasks(aContainer, compositor, aClipRect, + [&, surface, compositor, container]( + EffectChain& effectChain, const IntRect& clipRect) { + effectChain.mPrimaryEffect = + new EffectRenderTarget(surface); + + compositor->DrawGeometry( + visibleRect, clipRect, effectChain, + container->GetEffectiveOpacity(), + container->GetEffectiveTransform(), aGeometry); + }); + + } else { + RenderLayers(aContainer, aManager, + RenderTargetIntRect::FromUnknownRect(aClipRect), aGeometry); + } + + // If it is a scrollable container layer with no child layers, and one of the + // APZCs attached to it has a nonempty async transform, then that transform is + // not applied to any visible content. Display a warning box (conditioned on + // the FPS display being enabled). + if (StaticPrefs::layers_acceleration_draw_fps() && + aContainer->IsScrollableWithoutContent()) { + RefPtr<APZSampler> sampler = + aManager->GetCompositor()->GetCompositorBridgeParent()->GetAPZSampler(); + // Since aContainer doesn't have any children we can just iterate from the + // top metrics on it down to the bottom using GetFirstChild and not worry + // about walking onto another underlying layer. + for (LayerMetricsWrapper i(aContainer); i; i = i.GetFirstChild()) { + if (sampler->HasUnusedAsyncTransform(i)) { + aManager->UnusedApzTransformWarning(); + break; + } + } + } +} + +ContainerLayerComposite::ContainerLayerComposite( + LayerManagerComposite* aManager) + : ContainerLayer(aManager, nullptr), LayerComposite(aManager) { + MOZ_COUNT_CTOR(ContainerLayerComposite); + mImplData = static_cast<LayerComposite*>(this); +} + +ContainerLayerComposite::~ContainerLayerComposite() { + MOZ_COUNT_DTOR(ContainerLayerComposite); + + // We don't Destroy() on destruction here because this destructor + // can be called after remote content has crashed, and it may not be + // safe to free the IPC resources of our children. Those resources + // are automatically cleaned up by IPDL-generated code. + // + // In the common case of normal shutdown, either + // LayerManagerComposite::Destroy(), a parent + // *ContainerLayerComposite::Destroy(), or Disconnect() will trigger + // cleanup of our resources. + RemoveAllChildren(); +} + +void ContainerLayerComposite::Destroy() { + if (!mDestroyed) { + while (mFirstChild) { + GetFirstChildComposite()->Destroy(); + RemoveChild(mFirstChild); + } + mDestroyed = true; + } +} + +LayerComposite* ContainerLayerComposite::GetFirstChildComposite() { + if (!mFirstChild) { + return nullptr; + } + return static_cast<LayerComposite*>(mFirstChild->AsHostLayer()); +} + +void ContainerLayerComposite::Cleanup() { + mPrepared = nullptr; + + for (Layer* l = GetFirstChild(); l; l = l->GetNextSibling()) { + static_cast<LayerComposite*>(l->AsHostLayer())->Cleanup(); + } +} + +void ContainerLayerComposite::RenderLayer( + const gfx::IntRect& aClipRect, const Maybe<gfx::Polygon>& aGeometry) { + ContainerRender(this, mCompositeManager, aClipRect, aGeometry); +} + +void ContainerLayerComposite::Prepare(const RenderTargetIntRect& aClipRect) { + ContainerPrepare(this, mCompositeManager, aClipRect); +} + +void ContainerLayerComposite::CleanupResources() { + mLastIntermediateSurface = nullptr; + mPrepared = nullptr; + + for (Layer* l = GetFirstChild(); l; l = l->GetNextSibling()) { + static_cast<LayerComposite*>(l->AsHostLayer())->CleanupResources(); + } +} + +const LayerIntRegion& ContainerLayerComposite::GetShadowVisibleRegion() { + if (!UseIntermediateSurface()) { + RecomputeShadowVisibleRegionFromChildren(); + } + + return mShadowVisibleRegion; +} + +const LayerIntRegion& RefLayerComposite::GetShadowVisibleRegion() { + if (!UseIntermediateSurface()) { + RecomputeShadowVisibleRegionFromChildren(); + } + + return mShadowVisibleRegion; +} + +RefLayerComposite::RefLayerComposite(LayerManagerComposite* aManager) + : RefLayer(aManager, nullptr), LayerComposite(aManager) { + mImplData = static_cast<LayerComposite*>(this); +} + +RefLayerComposite::~RefLayerComposite() { Destroy(); } + +void RefLayerComposite::Destroy() { + MOZ_ASSERT(!mFirstChild); + mDestroyed = true; +} + +LayerComposite* RefLayerComposite::GetFirstChildComposite() { + if (!mFirstChild) { + return nullptr; + } + return static_cast<LayerComposite*>(mFirstChild->AsHostLayer()); +} + +void RefLayerComposite::RenderLayer(const gfx::IntRect& aClipRect, + const Maybe<gfx::Polygon>& aGeometry) { + ContainerRender(this, mCompositeManager, aClipRect, aGeometry); +} + +void RefLayerComposite::Prepare(const RenderTargetIntRect& aClipRect) { + ContainerPrepare(this, mCompositeManager, aClipRect); +} + +void RefLayerComposite::Cleanup() { + mPrepared = nullptr; + + for (Layer* l = GetFirstChild(); l; l = l->GetNextSibling()) { + static_cast<LayerComposite*>(l->AsHostLayer())->Cleanup(); + } +} + +void RefLayerComposite::CleanupResources() { + mLastIntermediateSurface = nullptr; + mPrepared = nullptr; +} + +} // namespace layers +} // namespace mozilla |