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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 "CanvasLayerComposite.h"
#include "composite/CompositableHost.h" // for CompositableHost
#include "gfx2DGlue.h" // for ToFilter
#include "gfxEnv.h" // for gfxEnv, etc
#include "mozilla/gfx/Matrix.h" // for Matrix4x4
#include "mozilla/gfx/Point.h" // for Point
#include "mozilla/gfx/Rect.h" // for Rect
#include "mozilla/layers/Compositor.h" // for Compositor
#include "mozilla/layers/Effects.h" // for EffectChain
#include "mozilla/mozalloc.h" // for operator delete
#include "nsAString.h"
#include "mozilla/RefPtr.h" // for nsRefPtr
#include "nsISupportsImpl.h" // for MOZ_COUNT_CTOR, etc
#include "nsString.h" // for nsAutoCString
namespace mozilla {
namespace layers {
using namespace mozilla::gfx;
CanvasLayerComposite::CanvasLayerComposite(LayerManagerComposite* aManager)
: CanvasLayer(aManager, nullptr)
, LayerComposite(aManager)
, mCompositableHost(nullptr)
{
MOZ_COUNT_CTOR(CanvasLayerComposite);
mImplData = static_cast<LayerComposite*>(this);
}
CanvasLayerComposite::~CanvasLayerComposite()
{
MOZ_COUNT_DTOR(CanvasLayerComposite);
CleanupResources();
}
bool
CanvasLayerComposite::SetCompositableHost(CompositableHost* aHost)
{
switch (aHost->GetType()) {
case CompositableType::IMAGE: {
if (mCompositableHost && aHost != mCompositableHost) {
mCompositableHost->Detach(this);
}
mCompositableHost = aHost;
return true;
}
default:
return false;
}
}
Layer*
CanvasLayerComposite::GetLayer()
{
return this;
}
void
CanvasLayerComposite::SetLayerManager(LayerManagerComposite* aManager)
{
LayerComposite::SetLayerManager(aManager);
mManager = aManager;
if (mCompositableHost && mCompositor) {
mCompositableHost->SetCompositor(mCompositor);
}
}
LayerRenderState
CanvasLayerComposite::GetRenderState()
{
if (mDestroyed || !mCompositableHost || !mCompositableHost->IsAttached()) {
return LayerRenderState();
}
return mCompositableHost->GetRenderState();
}
void
CanvasLayerComposite::RenderLayer(const IntRect& aClipRect)
{
if (!mCompositableHost || !mCompositableHost->IsAttached()) {
return;
}
mCompositor->MakeCurrent();
#ifdef MOZ_DUMP_PAINTING
if (gfxEnv::DumpCompositorTextures()) {
RefPtr<gfx::DataSourceSurface> surf = mCompositableHost->GetAsSurface();
if (surf) {
WriteSnapshotToDumpFile(this, surf);
}
}
#endif
RenderWithAllMasks(this, mCompositor, aClipRect,
[&](EffectChain& effectChain, const IntRect& clipRect) {
mCompositableHost->Composite(this, effectChain,
GetEffectiveOpacity(),
GetEffectiveTransform(),
GetSamplingFilter(),
clipRect);
});
mCompositableHost->BumpFlashCounter();
}
CompositableHost*
CanvasLayerComposite::GetCompositableHost()
{
if (mCompositableHost && mCompositableHost->IsAttached()) {
return mCompositableHost.get();
}
return nullptr;
}
void
CanvasLayerComposite::CleanupResources()
{
if (mCompositableHost) {
mCompositableHost->Detach(this);
}
mCompositableHost = nullptr;
}
gfx::SamplingFilter
CanvasLayerComposite::GetSamplingFilter()
{
gfx::SamplingFilter filter = mSamplingFilter;
#ifdef ANDROID
// Bug 691354
// Using the LINEAR filter we get unexplained artifacts.
// Use NEAREST when no scaling is required.
Matrix matrix;
bool is2D = GetEffectiveTransform().Is2D(&matrix);
if (is2D && !ThebesMatrix(matrix).HasNonTranslationOrFlip()) {
filter = SamplingFilter::POINT;
}
#endif
return filter;
}
void
CanvasLayerComposite::GenEffectChain(EffectChain& aEffect)
{
aEffect.mLayerRef = this;
aEffect.mPrimaryEffect = mCompositableHost->GenEffect(GetSamplingFilter());
}
void
CanvasLayerComposite::PrintInfo(std::stringstream& aStream, const char* aPrefix)
{
CanvasLayer::PrintInfo(aStream, aPrefix);
aStream << "\n";
if (mCompositableHost && mCompositableHost->IsAttached()) {
nsAutoCString pfx(aPrefix);
pfx += " ";
mCompositableHost->PrintInfo(aStream, pfx.get());
}
}
} // namespace layers
} // namespace mozilla
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