michael@0: /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include "CanvasLayerComposite.h"
michael@0: #include "composite/CompositableHost.h"  // for CompositableHost
michael@0: #include "gfx2DGlue.h"                  // for ToFilter, ToMatrix4x4
michael@0: #include "GraphicsFilter.h"             // for GraphicsFilter
michael@0: #include "gfxUtils.h"                   // for gfxUtils, etc
michael@0: #include "mozilla/gfx/Matrix.h"         // for Matrix4x4
michael@0: #include "mozilla/gfx/Point.h"          // for Point
michael@0: #include "mozilla/gfx/Rect.h"           // for Rect
michael@0: #include "mozilla/layers/Compositor.h"  // for Compositor
michael@0: #include "mozilla/layers/Effects.h"     // for EffectChain
michael@0: #include "mozilla/mozalloc.h"           // for operator delete
michael@0: #include "nsAString.h"
michael@0: #include "nsAutoPtr.h"                  // for nsRefPtr
michael@0: #include "nsISupportsImpl.h"            // for MOZ_COUNT_CTOR, etc
michael@0: #include "nsPoint.h"                    // for nsIntPoint
michael@0: #include "nsString.h"                   // for nsAutoCString
michael@0: 
michael@0: using namespace mozilla;
michael@0: using namespace mozilla::layers;
michael@0: using namespace mozilla::gfx;
michael@0: 
michael@0: CanvasLayerComposite::CanvasLayerComposite(LayerManagerComposite* aManager)
michael@0:   : CanvasLayer(aManager, nullptr)
michael@0:   , LayerComposite(aManager)
michael@0:   , mImageHost(nullptr)
michael@0: {
michael@0:   MOZ_COUNT_CTOR(CanvasLayerComposite);
michael@0:   mImplData = static_cast<LayerComposite*>(this);
michael@0: }
michael@0: 
michael@0: CanvasLayerComposite::~CanvasLayerComposite()
michael@0: {
michael@0:   MOZ_COUNT_DTOR(CanvasLayerComposite);
michael@0: 
michael@0:   CleanupResources();
michael@0: }
michael@0: 
michael@0: bool
michael@0: CanvasLayerComposite::SetCompositableHost(CompositableHost* aHost)
michael@0: {
michael@0:   switch (aHost->GetType()) {
michael@0:     case BUFFER_IMAGE_SINGLE:
michael@0:     case BUFFER_IMAGE_BUFFERED:
michael@0:     case COMPOSITABLE_IMAGE:
michael@0:       mImageHost = aHost;
michael@0:       return true;
michael@0:     default:
michael@0:       return false;
michael@0:   }
michael@0: 
michael@0: }
michael@0: 
michael@0: Layer*
michael@0: CanvasLayerComposite::GetLayer()
michael@0: {
michael@0:   return this;
michael@0: }
michael@0: 
michael@0: LayerRenderState
michael@0: CanvasLayerComposite::GetRenderState()
michael@0: {
michael@0:   if (mDestroyed || !mImageHost || !mImageHost->IsAttached()) {
michael@0:     return LayerRenderState();
michael@0:   }
michael@0:   return mImageHost->GetRenderState();
michael@0: }
michael@0: 
michael@0: void
michael@0: CanvasLayerComposite::RenderLayer(const nsIntRect& aClipRect)
michael@0: {
michael@0:   if (!mImageHost || !mImageHost->IsAttached()) {
michael@0:     return;
michael@0:   }
michael@0: 
michael@0:   mCompositor->MakeCurrent();
michael@0: 
michael@0: #ifdef MOZ_DUMP_PAINTING
michael@0:   if (gfxUtils::sDumpPainting) {
michael@0:     RefPtr<gfx::DataSourceSurface> surf = mImageHost->GetAsSurface();
michael@0:     WriteSnapshotToDumpFile(this, surf);
michael@0:   }
michael@0: #endif
michael@0: 
michael@0:   GraphicsFilter filter = mFilter;
michael@0: #ifdef ANDROID
michael@0:   // Bug 691354
michael@0:   // Using the LINEAR filter we get unexplained artifacts.
michael@0:   // Use NEAREST when no scaling is required.
michael@0:   Matrix matrix;
michael@0:   bool is2D = GetEffectiveTransform().Is2D(&matrix);
michael@0:   if (is2D && !ThebesMatrix(matrix).HasNonTranslationOrFlip()) {
michael@0:     filter = GraphicsFilter::FILTER_NEAREST;
michael@0:   }
michael@0: #endif
michael@0: 
michael@0:   EffectChain effectChain(this);
michael@0: 
michael@0:   LayerManagerComposite::AutoAddMaskEffect autoMaskEffect(mMaskLayer, effectChain);
michael@0:   gfx::Rect clipRect(aClipRect.x, aClipRect.y, aClipRect.width, aClipRect.height);
michael@0: 
michael@0:   mImageHost->Composite(effectChain,
michael@0:                         GetEffectiveOpacity(),
michael@0:                         GetEffectiveTransform(),
michael@0:                         gfx::ToFilter(filter),
michael@0:                         clipRect);
michael@0:   mImageHost->BumpFlashCounter();
michael@0: }
michael@0: 
michael@0: CompositableHost*
michael@0: CanvasLayerComposite::GetCompositableHost()
michael@0: {
michael@0:   if ( mImageHost && mImageHost->IsAttached()) {
michael@0:     return mImageHost.get();
michael@0:   }
michael@0: 
michael@0:   return nullptr;
michael@0: }
michael@0: 
michael@0: void
michael@0: CanvasLayerComposite::CleanupResources()
michael@0: {
michael@0:   if (mImageHost) {
michael@0:     mImageHost->Detach(this);
michael@0:   }
michael@0:   mImageHost = nullptr;
michael@0: }
michael@0: 
michael@0: nsACString&
michael@0: CanvasLayerComposite::PrintInfo(nsACString& aTo, const char* aPrefix)
michael@0: {
michael@0:   CanvasLayer::PrintInfo(aTo, aPrefix);
michael@0:   aTo += "\n";
michael@0:   if (mImageHost && mImageHost->IsAttached()) {
michael@0:     nsAutoCString pfx(aPrefix);
michael@0:     pfx += "  ";
michael@0:     mImageHost->PrintInfo(aTo, pfx.get());
michael@0:   }
michael@0:   return aTo;
michael@0: }
michael@0: