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/* -*- Mode: C++; tab-width: 2; 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 "BasicContainerLayer.h"
#include <sys/types.h> // for int32_t
#include "BasicLayersImpl.h" // for ToData
#include "basic/BasicImplData.h" // for BasicImplData
#include "basic/BasicLayers.h" // for BasicLayerManager
#include "mozilla/gfx/BaseRect.h" // for BaseRect
#include "mozilla/mozalloc.h" // for operator new
#include "nsCOMPtr.h" // for already_AddRefed
#include "nsISupportsImpl.h" // for Layer::AddRef, etc
#include "nsPoint.h" // for nsIntPoint
#include "nsRegion.h" // for nsIntRegion
#include "ReadbackProcessor.h"
using namespace mozilla::gfx;
namespace mozilla {
namespace layers {
BasicContainerLayer::~BasicContainerLayer()
{
while (mFirstChild) {
ContainerLayer::RemoveChild(mFirstChild);
}
MOZ_COUNT_DTOR(BasicContainerLayer);
}
void
BasicContainerLayer::ComputeEffectiveTransforms(const Matrix4x4& aTransformToSurface)
{
// We push groups for container layers if we need to, which always
// are aligned in device space, so it doesn't really matter how we snap
// containers.
Matrix residual;
Matrix4x4 transformToSurface = aTransformToSurface;
bool participate3DCtx = Extend3DContext() || Is3DContextLeaf();
if (!participate3DCtx &&
GetContentFlags() & CONTENT_BACKFACE_HIDDEN) {
// For backface-hidden layers
transformToSurface.ProjectTo2D();
}
Matrix4x4 idealTransform = GetLocalTransform() * transformToSurface;
if (!participate3DCtx &&
!(GetContentFlags() & CONTENT_BACKFACE_HIDDEN)) {
// For non-backface-hidden layers,
// 3D components are required to handle CONTENT_BACKFACE_HIDDEN.
idealTransform.ProjectTo2D();
}
if (!idealTransform.CanDraw2D()) {
if (!Extend3DContext()) {
mEffectiveTransform = idealTransform;
ComputeEffectiveTransformsForChildren(Matrix4x4());
ComputeEffectiveTransformForMaskLayers(Matrix4x4());
mUseIntermediateSurface = true;
return;
}
mEffectiveTransform = idealTransform;
ComputeEffectiveTransformsForChildren(idealTransform);
ComputeEffectiveTransformForMaskLayers(idealTransform);
mUseIntermediateSurface = false;
return;
}
// With 2D transform or extended 3D context.
Layer* child = GetFirstChild();
bool hasSingleBlendingChild = false;
if (!HasMultipleChildren() && child) {
hasSingleBlendingChild = child->GetMixBlendMode() != CompositionOp::OP_OVER;
}
/* If we have a single childand it is not blending,, it can just inherit our opacity,
* otherwise we need a PushGroup and we need to mark ourselves as using
* an intermediate surface so our children don't inherit our opacity
* via GetEffectiveOpacity.
* Having a mask layer always forces our own push group
* Having a blend mode also always forces our own push group
*/
mUseIntermediateSurface =
GetMaskLayer() ||
GetForceIsolatedGroup() ||
(GetMixBlendMode() != CompositionOp::OP_OVER && HasMultipleChildren()) ||
(GetEffectiveOpacity() != 1.0 && ((HasMultipleChildren() && !Extend3DContext()) || hasSingleBlendingChild));
mEffectiveTransform =
!mUseIntermediateSurface ?
idealTransform :
(!(GetContentFlags() & CONTENT_BACKFACE_HIDDEN) ?
SnapTransformTranslation(idealTransform, &residual) :
SnapTransformTranslation3D(idealTransform, &residual));
Matrix4x4 childTransformToSurface =
(!mUseIntermediateSurface ||
(mUseIntermediateSurface && !Extend3DContext() /* 2D */)) ?
idealTransform : Matrix4x4::From2D(residual);
ComputeEffectiveTransformsForChildren(childTransformToSurface);
ComputeEffectiveTransformForMaskLayers(aTransformToSurface);
}
bool
BasicContainerLayer::ChildrenPartitionVisibleRegion(const gfx::IntRect& aInRect)
{
Matrix transform;
if (!GetEffectiveTransform().CanDraw2D(&transform) ||
ThebesMatrix(transform).HasNonIntegerTranslation())
return false;
nsIntPoint offset(int32_t(transform._31), int32_t(transform._32));
gfx::IntRect rect = aInRect.Intersect(GetLocalVisibleRegion().ToUnknownRegion().GetBounds() + offset);
nsIntRegion covered;
for (Layer* l = mFirstChild; l; l = l->GetNextSibling()) {
if (ToData(l)->IsHidden())
continue;
Matrix childTransform;
if (!l->GetEffectiveTransform().CanDraw2D(&childTransform) ||
ThebesMatrix(childTransform).HasNonIntegerTranslation() ||
l->GetEffectiveOpacity() != 1.0)
return false;
nsIntRegion childRegion = l->GetLocalVisibleRegion().ToUnknownRegion();
childRegion.MoveBy(int32_t(childTransform._31), int32_t(childTransform._32));
childRegion.And(childRegion, rect);
if (l->GetClipRect()) {
childRegion.And(childRegion, l->GetClipRect()->ToUnknownRect() + offset);
}
nsIntRegion intersection;
intersection.And(covered, childRegion);
if (!intersection.IsEmpty())
return false;
covered.Or(covered, childRegion);
}
return covered.Contains(rect);
}
void
BasicContainerLayer::Validate(LayerManager::DrawPaintedLayerCallback aCallback,
void* aCallbackData,
ReadbackProcessor* aReadback)
{
ReadbackProcessor readback;
if (BasicManager()->IsRetained()) {
readback.BuildUpdates(this);
}
for (Layer* l = mFirstChild; l; l = l->GetNextSibling()) {
BasicImplData* data = ToData(l);
data->Validate(aCallback, aCallbackData, &readback);
if (l->GetMaskLayer()) {
data = ToData(l->GetMaskLayer());
data->Validate(aCallback, aCallbackData, nullptr);
}
}
}
already_AddRefed<ContainerLayer>
BasicLayerManager::CreateContainerLayer()
{
NS_ASSERTION(InConstruction(), "Only allowed in construction phase");
RefPtr<ContainerLayer> layer = new BasicContainerLayer(this);
return layer.forget();
}
} // namespace layers
} // namespace mozilla
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