gecko/gfx/layers/composite/CanvasLayerComposite.cpp
Boris Chiou c900095227 Bug 975346 - Part 1: General functions for Effects. r=dglastonbury
1. Support GenEffectChain() for LayerComposite.
   Each layer can use this API to gen the
   EffectChain (only primary effect now)
2. Support GenEffect() for CompositableHost.
3. Move AutoLock to compositeHost.
2014-06-22 19:06:00 +02:00

161 lines
4.2 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 "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 "nsISupportsImpl.h" // for MOZ_COUNT_CTOR, etc
#include "nsPoint.h" // for nsIntPoint
#include "nsString.h" // for nsAutoCString
namespace mozilla {
namespace 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();
}
bool
CanvasLayerComposite::SetCompositableHost(CompositableHost* aHost)
{
switch (aHost->GetType()) {
case CompositableType::BUFFER_IMAGE_SINGLE:
case CompositableType::BUFFER_IMAGE_BUFFERED:
case CompositableType::IMAGE:
mImageHost = aHost;
return true;
default:
return false;
}
}
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
EffectChain effectChain(this);
AddBlendModeEffect(effectChain);
LayerManagerComposite::AutoAddMaskEffect autoMaskEffect(mMaskLayer, effectChain);
gfx::Rect clipRect(aClipRect.x, aClipRect.y, aClipRect.width, aClipRect.height);
mImageHost->Composite(effectChain,
GetEffectiveOpacity(),
GetEffectiveTransform(),
GetEffectFilter(),
clipRect);
mImageHost->BumpFlashCounter();
}
CompositableHost*
CanvasLayerComposite::GetCompositableHost()
{
if ( mImageHost && mImageHost->IsAttached()) {
return mImageHost.get();
}
return nullptr;
}
void
CanvasLayerComposite::CleanupResources()
{
if (mImageHost) {
mImageHost->Detach(this);
}
mImageHost = nullptr;
}
gfx::Filter
CanvasLayerComposite::GetEffectFilter()
{
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
return gfx::ToFilter(filter);
}
void
CanvasLayerComposite::GenEffectChain(EffectChain& aEffect)
{
aEffect.mLayerRef = this;
aEffect.mPrimaryEffect = mImageHost->GenEffect(GetEffectFilter());
}
void
CanvasLayerComposite::PrintInfo(std::stringstream& aStream, const char* aPrefix)
{
CanvasLayer::PrintInfo(aStream, aPrefix);
aStream << "\n";
if (mImageHost && mImageHost->IsAttached()) {
nsAutoCString pfx(aPrefix);
pfx += " ";
mImageHost->PrintInfo(aStream, pfx.get());
}
}
}
}