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gecko-dev/gfx/layers/composite/ContainerLayerComposite.cpp

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/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* 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 "apz/src/AsyncPanZoomController.h" // for AsyncPanZoomController
#include "FrameMetrics.h" // for FrameMetrics
#include "Units.h" // for LayerRect, LayerPixel, etc
#include "CompositableHost.h" // for CompositableHost
#include "gfxEnv.h" // for gfxEnv
#include "gfxPrefs.h" // for gfxPrefs
#include "mozilla/Assertions.h" // for MOZ_ASSERT, etc
#include "mozilla/RefPtr.h" // for RefPtr
#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/Compositor.h" // for Compositor, etc
#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/AsyncCompositionManager.h" // for ViewTransform
#include "mozilla/layers/LayerMetricsWrapper.h" // for LayerMetricsWrapper
#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
#ifdef MOZ_GECKO_PROFILER
#include "ProfilerMarkerPayload.h" // for LayerTranslationMarkerPayload
#endif
#define CULLING_LOG(...)
// #define CULLING_LOG(...) printf_stderr("CULLING: " __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.ToUnknownRegion().GetBounds().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_is_active()) {
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();
profiler_add_marker(
"LayerTranslation",
MakeUnique<LayerTranslationMarkerPayload>(aLayer, translation,
TimeStamp::Now()));
#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());
} 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().ToUnknownRegion().GetBounds();
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(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,
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, LayerManagerComposite* aManager,
const RenderTargetIntRect& aClipRect, Layer* aLayer)
{
Compositor* compositor = aManager->GetCompositor();
if (aLayer->GetScrollMetadataCount() < 1) {
return;
}
AsyncPanZoomController* controller = aLayer->GetAsyncPanZoomController(0);
if (!controller) {
return;
}
ParentLayerPoint scrollOffset = controller->GetCurrentAsyncScrollOffset(AsyncPanZoomController::eForCompositing);
// Options
const int verticalPadding = 10;
const int horizontalPadding = 5;
gfx::Color backgroundColor(0.3f, 0.3f, 0.3f, 0.3f);
gfx::Color tileActiveColor(1, 1, 1, 0.4f);
gfx::Color tileBorderColor(0, 0, 0, 0.1f);
gfx::Color pageBorderColor(0, 0, 0);
gfx::Color criticalDisplayPortColor(1.f, 1.f, 0);
gfx::Color displayPortColor(0, 1.f, 0);
gfx::Color viewPortColor(0, 0, 1.f, 0.3f);
gfx::Color visibilityColor(1.f, 0, 0);
// Rects
const FrameMetrics& fm = aLayer->GetFrameMetrics(0);
ParentLayerRect compositionBounds = fm.GetCompositionBounds();
LayerRect scrollRect = fm.GetScrollableRect() * fm.LayersPixelsPerCSSPixel();
LayerRect viewRect = ParentLayerRect(scrollOffset, compositionBounds.Size()) / LayerToParentLayerScale(1);
LayerRect dp = (fm.GetDisplayPort() + fm.GetScrollOffset()) * fm.LayersPixelsPerCSSPixel();
Maybe<LayerRect> cdp;
if (!fm.GetCriticalDisplayPort().IsEmpty()) {
cdp = Some((fm.GetCriticalDisplayPort() + fm.GetScrollOffset()) * fm.LayersPixelsPerCSSPixel());
}
// Don't render trivial minimap. They can show up from textboxes and other tiny frames.
if (viewRect.width < 64 && viewRect.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());
// If enabled, render information about visibility.
if (gfxPrefs::APZMinimapVisibilityEnabled()) {
// Retrieve the APZC scrollable layer guid, which we'll use to get the
// appropriate visibility information from the layer manager.
AsyncPanZoomController* controller = aLayer->GetAsyncPanZoomController(0);
MOZ_ASSERT(controller);
ScrollableLayerGuid guid = controller->GetGuid();
// Get the approximately visible region.
static CSSIntRegion emptyRegion;
CSSIntRegion* visibleRegion = aManager->GetApproximatelyVisibleRegion(guid);
if (!visibleRegion) {
visibleRegion = &emptyRegion;
}
// Iterate through and draw the rects in the region.
for (CSSIntRegion::RectIterator iterator = visibleRegion->RectIter();
!iterator.Done();
iterator.Next())
{
CSSIntRect rect = iterator.Get();
LayerRect scaledRect = rect * fm.LayersPixelsPerCSSPixel();
Rect r = transform.TransformBounds(scaledRect.ToUnknownRect());
compositor->FillRect(r, visibilityColor, 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 viewport.
r = transform.TransformBounds(viewRect.ToUnknownRect());
compositor->SlowDrawRect(r, viewPortColor, 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();
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 (gfxPrefs::LayersDrawFPS()) {
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 (gfxPrefs::UniformityInfo()) {
PrintUniformityInfo(layer);
}
if (gfxPrefs::DrawLayerInfo()) {
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;
for (uint32_t i = layer->GetScrollMetadataCount(); i > 0; --i) {
if (layer->GetFrameMetrics(i - 1).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 = layer->GetFrameMetrics(i - 1).GetCompositionBounds();
aManager->GetCompositor()->DrawDiagnostics(DiagnosticFlags::CONTAINER,
compositionBounds.ToUnknownRect(),
aClipRect.ToUnknownRect(),
asyncTransform * aContainer->GetEffectiveTransform());
if (AsyncPanZoomController* apzc = layer->GetAsyncPanZoomController(i - 1)) {
asyncTransform =
apzc->GetCurrentAsyncTransformWithOverscroll(AsyncPanZoomController::eForCompositing).ToUnknownMatrix()
* asyncTransform;
}
}
}
if (gfxPrefs::APZMinimap()) {
RenderMinimap(aContainer, 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().ToUnknownRegion().GetBounds();
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 -= compositor->GetCurrentRenderTarget()->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().ToUnknownRegion().GetBounds());
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 (gfxPrefs::LayersDrawFPS() && aContainer->IsScrollableWithoutContent()) {
// 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 (AsyncPanZoomController* apzc = i.GetApzc()) {
if (!apzc->GetAsyncTransformAppliedToContent()
&& !AsyncTransformComponentMatrix(apzc->GetCurrentAsyncTransform(AsyncPanZoomController::eForHitTesting)).IsIdentity()) {
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.
while (mFirstChild) {
RemoveChild(mFirstChild);
}
}
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();
}
}
static LayerIntRect
TransformRect(const LayerIntRect& aRect, const Matrix4x4& aTransform)
{
if (aRect.IsEmpty()) {
return LayerIntRect();
}
Rect rect(aRect.x, aRect.y, aRect.width, aRect.height);
rect = aTransform.TransformAndClipBounds(rect, Rect::MaxIntRect());
rect.RoundOut();
IntRect intRect;
if (!gfxUtils::GfxRectToIntRect(ThebesRect(rect), &intRect)) {
return LayerIntRect();
}
return ViewAs<LayerPixel>(intRect);
}
static void
AddTransformedRegion(LayerIntRegion& aDest, const LayerIntRegion& aSource, const Matrix4x4& aTransform)
{
for (auto iter = aSource.RectIter(); !iter.Done(); iter.Next()) {
aDest.Or(aDest, TransformRect(iter.Get(), aTransform));
}
aDest.SimplifyOutward(20);
}
// Async animations can move child layers without updating our visible region.
// PostProcessLayers will recompute visible regions for layers with an intermediate
// surface, but otherwise we need to do it now.
void
ComputeVisibleRegionForChildren(ContainerLayer* aContainer, LayerIntRegion& aResult)
{
for (Layer* l = aContainer->GetFirstChild(); l; l = l->GetNextSibling()) {
if (l->Extend3DContext()) {
MOZ_ASSERT(l->AsContainerLayer());
ComputeVisibleRegionForChildren(l->AsContainerLayer(), aResult);
} else {
AddTransformedRegion(aResult,
l->GetLocalVisibleRegion(),
l->ComputeTransformToPreserve3DRoot());
}
}
}
const LayerIntRegion&
ContainerLayerComposite::GetShadowVisibleRegion()
{
if (!UseIntermediateSurface()) {
mShadowVisibleRegion.SetEmpty();
ComputeVisibleRegionForChildren(this, mShadowVisibleRegion);
}
return mShadowVisibleRegion;
}
const LayerIntRegion&
RefLayerComposite::GetShadowVisibleRegion()
{
if (!UseIntermediateSurface()) {
mShadowVisibleRegion.SetEmpty();
ComputeVisibleRegionForChildren(this, mShadowVisibleRegion);
}
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
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