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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 "ImageLayerComposite.h"
#include "CompositableHost.h" // for CompositableHost
#include "Layers.h" // for WriteSnapshotToDumpFile, etc
#include "gfx2DGlue.h" // for ToFilter
#include "gfxEnv.h" // for gfxEnv
#include "gfxRect.h" // for gfxRect
#include "mozilla/Assertions.h" // for MOZ_ASSERT, etc
#include "mozilla/gfx/Matrix.h" // for Matrix4x4
#include "mozilla/gfx/Point.h" // for IntSize, Point
#include "mozilla/gfx/Rect.h" // for Rect
#include "mozilla/layers/Compositor.h" // for Compositor
#include "mozilla/layers/Effects.h" // for EffectChain
#include "mozilla/layers/ImageHost.h" // for ImageHost
#include "mozilla/layers/TextureHost.h" // for TextureHost, etc
#include "mozilla/mozalloc.h" // for operator delete
#include "nsAString.h"
#include "mozilla/RefPtr.h" // for nsRefPtr
#include "nsDebug.h" // for NS_ASSERTION
#include "nsISupportsImpl.h" // for MOZ_COUNT_CTOR, etc
#include "nsString.h" // for nsAutoCString
namespace mozilla {
namespace layers {
using namespace mozilla::gfx;
ImageLayerComposite::ImageLayerComposite(LayerManagerComposite* aManager)
: ImageLayer(aManager, nullptr)
, LayerComposite(aManager)
, mImageHost(nullptr)
{
MOZ_COUNT_CTOR(ImageLayerComposite);
mImplData = static_cast<LayerComposite*>(this);
}
ImageLayerComposite::~ImageLayerComposite()
{
MOZ_COUNT_DTOR(ImageLayerComposite);
MOZ_ASSERT(mDestroyed);
CleanupResources();
}
bool
ImageLayerComposite::SetCompositableHost(CompositableHost* aHost)
{
switch (aHost->GetType()) {
case CompositableType::IMAGE: {
ImageHost* newImageHost = static_cast<ImageHost*>(aHost);
if (mImageHost && newImageHost != mImageHost) {
mImageHost->Detach(this);
}
mImageHost = newImageHost;
return true;
}
default:
return false;
}
}
void
ImageLayerComposite::Disconnect()
{
Destroy();
}
LayerRenderState
ImageLayerComposite::GetRenderState()
{
if (mImageHost && mImageHost->IsAttached()) {
return mImageHost->GetRenderState();
}
return LayerRenderState();
}
Layer*
ImageLayerComposite::GetLayer()
{
return this;
}
void
ImageLayerComposite::SetLayerManager(LayerManagerComposite* aManager)
{
LayerComposite::SetLayerManager(aManager);
mManager = aManager;
if (mImageHost) {
mImageHost->SetCompositor(mCompositor);
}
}
void
ImageLayerComposite::RenderLayer(const IntRect& aClipRect)
{
if (!mImageHost || !mImageHost->IsAttached()) {
return;
}
#ifdef MOZ_DUMP_PAINTING
if (gfxEnv::DumpCompositorTextures()) {
RefPtr<gfx::DataSourceSurface> surf = mImageHost->GetAsSurface();
if (surf) {
WriteSnapshotToDumpFile(this, surf);
}
}
#endif
mCompositor->MakeCurrent();
RenderWithAllMasks(this, mCompositor, aClipRect,
[&](EffectChain& effectChain, const IntRect& clipRect) {
mImageHost->SetCompositor(mCompositor);
mImageHost->Composite(this, effectChain,
GetEffectiveOpacity(),
GetEffectiveTransformForBuffer(),
GetSamplingFilter(),
clipRect);
});
mImageHost->BumpFlashCounter();
}
void
ImageLayerComposite::ComputeEffectiveTransforms(const gfx::Matrix4x4& aTransformToSurface)
{
gfx::Matrix4x4 local = GetLocalTransform();
// Snap image edges to pixel boundaries
gfxRect sourceRect(0, 0, 0, 0);
if (mImageHost &&
mImageHost->IsAttached()) {
IntSize size = mImageHost->GetImageSize();
sourceRect.SizeTo(size.width, size.height);
}
// Snap our local transform first, and snap the inherited transform as well.
// This makes our snapping equivalent to what would happen if our content
// was drawn into a PaintedLayer (gfxContext would snap using the local
// transform, then we'd snap again when compositing the PaintedLayer).
mEffectiveTransform =
SnapTransform(local, sourceRect, nullptr) *
SnapTransformTranslation(aTransformToSurface, nullptr);
if (mScaleMode != ScaleMode::SCALE_NONE &&
sourceRect.width != 0.0 && sourceRect.height != 0.0) {
NS_ASSERTION(mScaleMode == ScaleMode::STRETCH,
"No other scalemodes than stretch and none supported yet.");
local.PreScale(mScaleToSize.width / sourceRect.width,
mScaleToSize.height / sourceRect.height, 1.0);
mEffectiveTransformForBuffer =
SnapTransform(local, sourceRect, nullptr) *
SnapTransformTranslation(aTransformToSurface, nullptr);
} else {
mEffectiveTransformForBuffer = mEffectiveTransform;
}
ComputeEffectiveTransformForMaskLayers(aTransformToSurface);
}
bool
ImageLayerComposite::IsOpaque()
{
if (!mImageHost ||
!mImageHost->IsAttached()) {
return false;
}
if (mScaleMode == ScaleMode::STRETCH) {
return mImageHost->IsOpaque();
}
return false;
}
nsIntRegion
ImageLayerComposite::GetFullyRenderedRegion()
{
if (!mImageHost ||
!mImageHost->IsAttached()) {
return GetShadowVisibleRegion().ToUnknownRegion();
}
if (mScaleMode == ScaleMode::STRETCH) {
nsIntRegion shadowVisibleRegion;
shadowVisibleRegion.And(GetShadowVisibleRegion().ToUnknownRegion(), nsIntRegion(gfx::IntRect(0, 0, mScaleToSize.width, mScaleToSize.height)));
return shadowVisibleRegion;
}
return GetShadowVisibleRegion().ToUnknownRegion();
}
CompositableHost*
ImageLayerComposite::GetCompositableHost()
{
if (mImageHost && mImageHost->IsAttached()) {
return mImageHost.get();
}
return nullptr;
}
void
ImageLayerComposite::CleanupResources()
{
if (mImageHost) {
mImageHost->CleanupResources();
mImageHost->Detach(this);
}
mImageHost = nullptr;
}
gfx::SamplingFilter
ImageLayerComposite::GetSamplingFilter()
{
return mSamplingFilter;
}
void
ImageLayerComposite::GenEffectChain(EffectChain& aEffect)
{
aEffect.mLayerRef = this;
aEffect.mPrimaryEffect = mImageHost->GenEffect(GetSamplingFilter());
}
void
ImageLayerComposite::PrintInfo(std::stringstream& aStream, const char* aPrefix)
{
ImageLayer::PrintInfo(aStream, aPrefix);
if (mImageHost && mImageHost->IsAttached()) {
aStream << "\n";
nsAutoCString pfx(aPrefix);
pfx += " ";
mImageHost->PrintInfo(aStream, pfx.get());
}
}
} // namespace layers
} // namespace mozilla
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