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 "ImageLayerComposite.h"
michael@0: #include "CompositableHost.h"           // for CompositableHost
michael@0: #include "Layers.h"                     // for WriteSnapshotToDumpFile, etc
michael@0: #include "gfx2DGlue.h"                  // for ToFilter, ToMatrix4x4
michael@0: #include "gfxRect.h"                    // for gfxRect
michael@0: #include "gfxUtils.h"                   // for gfxUtils, etc
michael@0: #include "mozilla/Assertions.h"         // for MOZ_ASSERT, etc
michael@0: #include "mozilla/gfx/Matrix.h"         // for Matrix4x4
michael@0: #include "mozilla/gfx/Point.h"          // for IntSize, 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/layers/TextureHost.h"  // for TextureHost, etc
michael@0: #include "mozilla/mozalloc.h"           // for operator delete
michael@0: #include "nsAString.h"
michael@0: #include "nsAutoPtr.h"                  // for nsRefPtr
michael@0: #include "nsDebug.h"                    // for NS_ASSERTION
michael@0: #include "nsISupportsImpl.h"            // for MOZ_COUNT_CTOR, etc
michael@0: #include "nsPoint.h"                    // for nsIntPoint
michael@0: #include "nsRect.h"                     // for nsIntRect
michael@0: #include "nsString.h"                   // for nsAutoCString
michael@0: 
michael@0: using namespace mozilla::gfx;
michael@0: 
michael@0: namespace mozilla {
michael@0: namespace layers {
michael@0: 
michael@0: ImageLayerComposite::ImageLayerComposite(LayerManagerComposite* aManager)
michael@0:   : ImageLayer(aManager, nullptr)
michael@0:   , LayerComposite(aManager)
michael@0:   , mImageHost(nullptr)
michael@0: {
michael@0:   MOZ_COUNT_CTOR(ImageLayerComposite);
michael@0:   mImplData = static_cast<LayerComposite*>(this);
michael@0: }
michael@0: 
michael@0: ImageLayerComposite::~ImageLayerComposite()
michael@0: {
michael@0:   MOZ_COUNT_DTOR(ImageLayerComposite);
michael@0:   MOZ_ASSERT(mDestroyed);
michael@0: 
michael@0:   CleanupResources();
michael@0: }
michael@0: 
michael@0: bool
michael@0: ImageLayerComposite::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: void
michael@0: ImageLayerComposite::Disconnect()
michael@0: {
michael@0:   Destroy();
michael@0: }
michael@0: 
michael@0: LayerRenderState
michael@0: ImageLayerComposite::GetRenderState()
michael@0: {
michael@0:   if (mImageHost && mImageHost->IsAttached()) {
michael@0:     return mImageHost->GetRenderState();
michael@0:   }
michael@0:   return LayerRenderState();
michael@0: }
michael@0: 
michael@0: Layer*
michael@0: ImageLayerComposite::GetLayer()
michael@0: {
michael@0:   return this;
michael@0: }
michael@0: 
michael@0: void
michael@0: ImageLayerComposite::RenderLayer(const nsIntRect& aClipRect)
michael@0: {
michael@0:   if (!mImageHost || !mImageHost->IsAttached()) {
michael@0:     return;
michael@0:   }
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:   mCompositor->MakeCurrent();
michael@0: 
michael@0:   EffectChain effectChain(this);
michael@0:   LayerManagerComposite::AutoAddMaskEffect autoMaskEffect(mMaskLayer, effectChain);
michael@0: 
michael@0:   gfx::Rect clipRect(aClipRect.x, aClipRect.y, aClipRect.width, aClipRect.height);
michael@0:   mImageHost->SetCompositor(mCompositor);
michael@0:   mImageHost->Composite(effectChain,
michael@0:                         GetEffectiveOpacity(),
michael@0:                         GetEffectiveTransform(),
michael@0:                         gfx::ToFilter(mFilter),
michael@0:                         clipRect);
michael@0:   mImageHost->BumpFlashCounter();
michael@0: }
michael@0: 
michael@0: void
michael@0: ImageLayerComposite::ComputeEffectiveTransforms(const gfx::Matrix4x4& aTransformToSurface)
michael@0: {
michael@0:   gfx::Matrix4x4 local = GetLocalTransform();
michael@0: 
michael@0:   // Snap image edges to pixel boundaries
michael@0:   gfxRect sourceRect(0, 0, 0, 0);
michael@0:   if (mImageHost &&
michael@0:       mImageHost->IsAttached() &&
michael@0:       mImageHost->GetAsTextureHost()) {
michael@0:     IntSize size = mImageHost->GetAsTextureHost()->GetSize();
michael@0:     sourceRect.SizeTo(size.width, size.height);
michael@0:     if (mScaleMode != ScaleMode::SCALE_NONE &&
michael@0:         sourceRect.width != 0.0 && sourceRect.height != 0.0) {
michael@0:       NS_ASSERTION(mScaleMode == ScaleMode::STRETCH,
michael@0:                    "No other scalemodes than stretch and none supported yet.");
michael@0:       local.Scale(mScaleToSize.width / sourceRect.width,
michael@0:                   mScaleToSize.height / sourceRect.height, 1.0);
michael@0:     }
michael@0:   }
michael@0:   // Snap our local transform first, and snap the inherited transform as well.
michael@0:   // This makes our snapping equivalent to what would happen if our content
michael@0:   // was drawn into a ThebesLayer (gfxContext would snap using the local
michael@0:   // transform, then we'd snap again when compositing the ThebesLayer).
michael@0:   mEffectiveTransform =
michael@0:       SnapTransform(local, sourceRect, nullptr) *
michael@0:       SnapTransformTranslation(aTransformToSurface, nullptr);
michael@0:   ComputeEffectiveTransformForMaskLayer(aTransformToSurface);
michael@0: }
michael@0: 
michael@0: CompositableHost*
michael@0: ImageLayerComposite::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: ImageLayerComposite::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: ImageLayerComposite::PrintInfo(nsACString& aTo, const char* aPrefix)
michael@0: {
michael@0:   ImageLayer::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: 
michael@0: } /* layers */
michael@0: } /* mozilla */