gecko/gfx/layers/composite/CanvasLayerComposite.cpp
2014-01-27 15:25:19 -05:00

135 lines
3.6 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 "CanvasLayerComposite.h"
#include "composite/CompositableHost.h" // for CompositableHost
#include "gfx2DGlue.h" // for ToFilter, ToMatrix4x4
#include "GraphicsFilter.h" // for GraphicsFilter
#include "gfxUtils.h" // for gfxUtils, 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 "nsAutoPtr.h" // for nsRefPtr
#include "nsPoint.h" // for nsIntPoint
#include "nsString.h" // for nsAutoCString
#include "nsTraceRefcnt.h" // for MOZ_COUNT_CTOR, etc
using namespace mozilla;
using namespace mozilla::layers;
using namespace mozilla::gfx;
CanvasLayerComposite::CanvasLayerComposite(LayerManagerComposite* aManager)
: CanvasLayer(aManager, nullptr)
, LayerComposite(aManager)
, mImageHost(nullptr)
{
MOZ_COUNT_CTOR(CanvasLayerComposite);
mImplData = static_cast<LayerComposite*>(this);
}
CanvasLayerComposite::~CanvasLayerComposite()
{
MOZ_COUNT_DTOR(CanvasLayerComposite);
CleanupResources();
}
void
CanvasLayerComposite::SetCompositableHost(CompositableHost* aHost) {
mImageHost = aHost;
}
Layer*
CanvasLayerComposite::GetLayer()
{
return this;
}
LayerRenderState
CanvasLayerComposite::GetRenderState()
{
if (mDestroyed || !mImageHost || !mImageHost->IsAttached()) {
return LayerRenderState();
}
return mImageHost->GetRenderState();
}
void
CanvasLayerComposite::RenderLayer(const nsIntRect& aClipRect)
{
if (!mImageHost || !mImageHost->IsAttached()) {
return;
}
mCompositor->MakeCurrent();
#ifdef MOZ_DUMP_PAINTING
if (gfxUtils::sDumpPainting) {
RefPtr<gfx::DataSourceSurface> surf = mImageHost->GetAsSurface();
WriteSnapshotToDumpFile(this, surf);
}
#endif
GraphicsFilter filter = mFilter;
#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 = GraphicsFilter::FILTER_NEAREST;
}
#endif
EffectChain effectChain(this);
LayerManagerComposite::AutoAddMaskEffect autoMaskEffect(mMaskLayer, effectChain);
gfx::Rect clipRect(aClipRect.x, aClipRect.y, aClipRect.width, aClipRect.height);
mImageHost->Composite(effectChain,
GetEffectiveOpacity(),
GetEffectiveTransform(),
gfx::ToFilter(filter),
clipRect);
}
CompositableHost*
CanvasLayerComposite::GetCompositableHost()
{
if ( mImageHost && mImageHost->IsAttached()) {
return mImageHost.get();
}
return nullptr;
}
void
CanvasLayerComposite::CleanupResources()
{
if (mImageHost) {
mImageHost->Detach(this);
}
mImageHost = nullptr;
}
nsACString&
CanvasLayerComposite::PrintInfo(nsACString& aTo, const char* aPrefix)
{
CanvasLayer::PrintInfo(aTo, aPrefix);
aTo += "\n";
if (mImageHost && mImageHost->IsAttached()) {
nsAutoCString pfx(aPrefix);
pfx += " ";
mImageHost->PrintInfo(aTo, pfx.get());
}
return aTo;
}