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

174 lines
5.2 KiB
C++

/* -*- 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, ToMatrix4x4
#include "gfx3DMatrix.h" // for gfx3DMatrix
#include "gfxRect.h" // for gfxRect
#include "gfxUtils.h" // for gfxUtils, etc
#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/TextureHost.h" // for DeprecatedTextureHost, etc
#include "mozilla/mozalloc.h" // for operator delete
#include "nsAString.h"
#include "nsAutoPtr.h" // for nsRefPtr
#include "nsDebug.h" // for NS_ASSERTION
#include "nsPoint.h" // for nsIntPoint
#include "nsRect.h" // for nsIntRect
#include "nsString.h" // for nsAutoCString
#include "nsTraceRefcnt.h" // for MOZ_COUNT_CTOR, etc
using namespace mozilla::gfx;
namespace mozilla {
namespace layers {
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();
}
void
ImageLayerComposite::SetCompositableHost(CompositableHost* aHost)
{
mImageHost = aHost;
}
void
ImageLayerComposite::Disconnect()
{
Destroy();
}
LayerRenderState
ImageLayerComposite::GetRenderState()
{
if (mImageHost && mImageHost->IsAttached()) {
return mImageHost->GetRenderState();
}
return LayerRenderState();
}
Layer*
ImageLayerComposite::GetLayer()
{
return this;
}
void
ImageLayerComposite::RenderLayer(const nsIntRect& aClipRect)
{
if (!mImageHost || !mImageHost->IsAttached()) {
return;
}
#ifdef MOZ_DUMP_PAINTING
if (gfxUtils::sDumpPainting) {
RefPtr<gfx::DataSourceSurface> surf = mImageHost->GetAsSurface();
WriteSnapshotToDumpFile(this, surf);
}
#endif
mCompositor->MakeCurrent();
EffectChain effectChain;
LayerManagerComposite::AutoAddMaskEffect autoMaskEffect(mMaskLayer, effectChain);
gfx::Matrix4x4 transform;
ToMatrix4x4(GetEffectiveTransform(), transform);
gfx::Rect clipRect(aClipRect.x, aClipRect.y, aClipRect.width, aClipRect.height);
mImageHost->SetCompositor(mCompositor);
mImageHost->Composite(effectChain,
GetEffectiveOpacity(),
transform,
gfx::ToFilter(mFilter),
clipRect);
}
void
ImageLayerComposite::ComputeEffectiveTransforms(const gfx3DMatrix& aTransformToSurface)
{
gfx3DMatrix local = GetLocalTransform();
// Snap image edges to pixel boundaries
gfxRect sourceRect(0, 0, 0, 0);
if (mImageHost &&
mImageHost->IsAttached() &&
(mImageHost->GetDeprecatedTextureHost() || mImageHost->GetAsTextureHost())) {
IntSize size =
mImageHost->GetAsTextureHost() ? mImageHost->GetAsTextureHost()->GetSize()
: mImageHost->GetDeprecatedTextureHost()->GetSize();
sourceRect.SizeTo(size.width, size.height);
if (mScaleMode != SCALE_NONE &&
sourceRect.width != 0.0 && sourceRect.height != 0.0) {
NS_ASSERTION(mScaleMode == SCALE_STRETCH,
"No other scalemodes than stretch and none supported yet.");
local.Scale(mScaleToSize.width / sourceRect.width,
mScaleToSize.height / sourceRect.height, 1.0);
}
}
// 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 ThebesLayer (gfxContext would snap using the local
// transform, then we'd snap again when compositing the ThebesLayer).
mEffectiveTransform =
SnapTransform(local, sourceRect, nullptr) *
SnapTransformTranslation(aTransformToSurface, nullptr);
ComputeEffectiveTransformForMaskLayer(aTransformToSurface);
}
CompositableHost*
ImageLayerComposite::GetCompositableHost()
{
if (mImageHost && mImageHost->IsAttached()) {
return mImageHost.get();
}
return nullptr;
}
void
ImageLayerComposite::CleanupResources()
{
if (mImageHost) {
mImageHost->Detach(this);
}
mImageHost = nullptr;
}
nsACString&
ImageLayerComposite::PrintInfo(nsACString& aTo, const char* aPrefix)
{
ImageLayer::PrintInfo(aTo, aPrefix);
aTo += "\n";
if (mImageHost && mImageHost->IsAttached()) {
nsAutoCString pfx(aPrefix);
pfx += " ";
mImageHost->PrintInfo(aTo, pfx.get());
}
return aTo;
}
} /* layers */
} /* mozilla */