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/* -*- 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 "ContainerLayerMLGPU.h"
#include "mozilla/StaticPrefs_layers.h"
#include "LayerManagerMLGPU.h"
#include "MLGDevice.h"
#include "mozilla/gfx/Rect.h"
#include "mozilla/gfx/Types.h"
#include "UnitTransforms.h"
#include "UtilityMLGPU.h"
namespace mozilla {
namespace layers {
using namespace gfx;
ContainerLayerMLGPU::ContainerLayerMLGPU(LayerManagerMLGPU* aManager)
: ContainerLayer(aManager, nullptr),
LayerMLGPU(aManager),
mInvalidateEntireSurface(false),
mSurfaceCopyNeeded(false),
mView(nullptr) {}
ContainerLayerMLGPU::~ContainerLayerMLGPU() {
while (mFirstChild) {
RemoveChild(mFirstChild);
}
}
bool ContainerLayerMLGPU::OnPrepareToRender(FrameBuilder* aBuilder) {
mView = nullptr;
if (!UseIntermediateSurface()) {
// Set this so we invalidate the entire cached render target (if any)
// if our container uses an intermediate surface again later.
mInvalidateEntireSurface = true;
return true;
}
mChildrenChanged = false;
mTargetOffset = GetIntermediateSurfaceRect().TopLeft().ToUnknownPoint();
mTargetSize = GetIntermediateSurfaceRect().Size().ToUnknownSize();
if (mRenderTarget && mRenderTarget->GetSize() != mTargetSize) {
mRenderTarget = nullptr;
}
// Note that if a surface copy is needed, we always redraw the
// whole surface (on-demand). This is a rare case - the old
// Compositor already does this - and it saves us having to
// do much more complicated invalidation.
bool surfaceCopyNeeded = false;
DefaultComputeSupportsComponentAlphaChildren(&surfaceCopyNeeded);
if (surfaceCopyNeeded != mSurfaceCopyNeeded || surfaceCopyNeeded) {
mInvalidateEntireSurface = true;
}
mSurfaceCopyNeeded = surfaceCopyNeeded;
gfx::IntRect viewport(gfx::IntPoint(0, 0), mTargetSize);
if (!mRenderTarget || !StaticPrefs::layers_mlgpu_enable_invalidation() ||
mInvalidateEntireSurface) {
// Fine-grained invalidation is disabled, invalidate everything.
mInvalidRect = viewport;
} else {
// Clamp the invalid rect to the viewport.
mInvalidRect -= mTargetOffset;
mInvalidRect = mInvalidRect.Intersect(viewport);
}
mInvalidateEntireSurface = false;
return true;
}
static IntRect GetTransformedBounds(Layer* aLayer) {
IntRect bounds = aLayer->GetLocalVisibleRegion().GetBounds().ToUnknownRect();
if (bounds.IsEmpty()) {
return bounds;
}
const Matrix4x4& transform = aLayer->GetEffectiveTransform();
Rect rect =
transform.TransformAndClipBounds(Rect(bounds), Rect::MaxIntRect());
rect.RoundOut();
rect.ToIntRect(&bounds);
return bounds;
}
/* static */
Maybe<IntRect> ContainerLayerMLGPU::FindVisibleBounds(
Layer* aLayer, const Maybe<RenderTargetIntRect>& aClip) {
AL_LOG(" visiting child %p\n", aLayer);
AL_LOG_IF(aClip, " parent clip: %s\n", Stringify(aClip.value()).c_str());
ContainerLayer* container = aLayer->AsContainerLayer();
if (container) {
if (container->UseIntermediateSurface()) {
ContainerLayerMLGPU* c =
container->AsHostLayer()->AsLayerMLGPU()->AsContainerLayerMLGPU();
if (!c) {
gfxCriticalError()
<< "not container: "
<< container->AsHostLayer()->AsLayerMLGPU()->GetType();
}
MOZ_RELEASE_ASSERT(c);
c->ComputeIntermediateSurfaceBounds();
} else {
Maybe<IntRect> accumulated = Some(IntRect());
// Traverse children.
for (Layer* child = container->GetFirstChild(); child;
child = child->GetNextSibling()) {
Maybe<RenderTargetIntRect> clip = aClip;
if (const Maybe<ParentLayerIntRect>& childClip =
child->AsHostLayer()->GetShadowClipRect()) {
RenderTargetIntRect rtChildClip = TransformBy(
ViewAs<ParentLayerToRenderTargetMatrix4x4>(
aLayer->GetEffectiveTransform(),
PixelCastJustification::RenderTargetIsParentLayerForRoot),
childClip.value());
clip = IntersectMaybeRects(clip, Some(rtChildClip));
AL_LOG(" target clip: %s\n", Stringify(rtChildClip).c_str());
AL_LOG_IF(clip, " full clip: %s\n",
Stringify(clip.value()).c_str());
}
Maybe<IntRect> childBounds = FindVisibleBounds(child, clip);
if (!childBounds) {
return Nothing();
}
accumulated = accumulated->SafeUnion(childBounds.value());
if (!accumulated) {
return Nothing();
}
}
return accumulated;
}
}
IntRect bounds = GetTransformedBounds(aLayer);
AL_LOG(" layer bounds: %s\n", Stringify(bounds).c_str());
if (aClip) {
bounds = bounds.Intersect(aClip.value().ToUnknownRect());
AL_LOG(" clipped bounds: %s\n", Stringify(bounds).c_str());
}
return Some(bounds);
}
void ContainerLayerMLGPU::ComputeIntermediateSurfaceBounds() {
Maybe<IntRect> bounds = Some(IntRect());
for (Layer* child = GetFirstChild(); child; child = child->GetNextSibling()) {
Maybe<RenderTargetIntRect> clip = ViewAs<RenderTargetPixel>(
child->AsHostLayer()->GetShadowClipRect(),
PixelCastJustification::RenderTargetIsParentLayerForRoot);
Maybe<IntRect> childBounds = FindVisibleBounds(child, clip);
if (!childBounds) {
return;
}
bounds = bounds->SafeUnion(childBounds.value());
if (!bounds) {
return;
}
}
SetShadowVisibleRegion(LayerIntRect::FromUnknownRect(bounds.value()));
}
void ContainerLayerMLGPU::OnLayerManagerChange(LayerManagerMLGPU* aManager) {
ClearCachedResources();
}
RefPtr<MLGRenderTarget> ContainerLayerMLGPU::UpdateRenderTarget(
MLGDevice* aDevice, MLGRenderTargetFlags aFlags) {
if (mRenderTarget) {
return mRenderTarget;
}
mRenderTarget = aDevice->CreateRenderTarget(mTargetSize, aFlags);
if (!mRenderTarget) {
gfxWarning()
<< "Failed to create an intermediate render target for ContainerLayer";
return nullptr;
}
return mRenderTarget;
}
void ContainerLayerMLGPU::SetInvalidCompositeRect(const gfx::IntRect* aRect) {
// For simplicity we only track the bounds of the invalid area, since regions
// are expensive.
//
// Note we add the bounds to the invalid rect from the last frame, since we
// only clear the area that we actually paint. If this overflows we use the
// last render target size, since if that changes we'll invalidate everything
// anyway.
if (aRect) {
if (Maybe<gfx::IntRect> result = mInvalidRect.SafeUnion(*aRect)) {
mInvalidRect = result.value();
} else {
mInvalidateEntireSurface = true;
}
} else {
mInvalidateEntireSurface = true;
}
}
void ContainerLayerMLGPU::ClearCachedResources() { mRenderTarget = nullptr; }
bool ContainerLayerMLGPU::IsContentOpaque() {
if (GetMixBlendMode() != gfx::CompositionOp::OP_OVER) {
// We need to read from what's underneath us, so we consider our content to
// be not opaque.
return false;
}
return LayerMLGPU::IsContentOpaque();
}
const LayerIntRegion& ContainerLayerMLGPU::GetShadowVisibleRegion() {
if (!UseIntermediateSurface()) {
RecomputeShadowVisibleRegionFromChildren();
}
return mShadowVisibleRegion;
}
const LayerIntRegion& RefLayerMLGPU::GetShadowVisibleRegion() {
if (!UseIntermediateSurface()) {
RecomputeShadowVisibleRegionFromChildren();
}
return mShadowVisibleRegion;
}
} // namespace layers
} // namespace mozilla
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