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309 lines
10 KiB
C++
309 lines
10 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef MOZILLA_GFX_BUFFERHOST_H
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#define MOZILLA_GFX_BUFFERHOST_H
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#include "mozilla/layers/Compositor.h"
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#include "mozilla/layers/PCompositableParent.h"
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#include "mozilla/layers/ISurfaceAllocator.h"
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#include "ThebesLayerBuffer.h"
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#include "ClientTiledThebesLayer.h" // for BasicTiledLayerBuffer
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#include "mozilla/RefPtr.h"
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namespace mozilla {
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namespace layers {
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// Some properties of a Layer required for tiling
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struct TiledLayerProperties
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{
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nsIntRegion mVisibleRegion;
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nsIntRegion mValidRegion;
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gfxRect mDisplayPort;
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gfxSize mEffectiveResolution;
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gfxRect mCompositionBounds;
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bool mRetainTiles;
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};
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class Layer;
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class TextureHost;
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class SurfaceDescriptor;
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/**
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* The compositor-side counterpart to CompositableClient. Responsible for
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* updating textures and data about textures from IPC and how textures are
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* composited (tiling, double buffering, etc.).
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*
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* Update (for images/canvases) and UpdateThebes (for Thebes) are called during
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* the layers transaction to update the Compositbale's textures from the
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* content side. The actual update (and any syncronous upload) is done by the
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* TextureHost, but it is coordinated by the CompositableHost.
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*
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* Composite is called by the owning layer when it is composited. CompositableHost
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* will use its TextureHost(s) and call Compositor::DrawQuad to do the actual
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* rendering.
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*/
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class CompositableHost : public RefCounted<CompositableHost>
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{
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public:
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CompositableHost(const TextureInfo& aTextureInfo)
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: mTextureInfo(aTextureInfo)
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, mCompositor(nullptr)
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, mLayer(nullptr)
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{
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MOZ_COUNT_CTOR(CompositableHost);
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}
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virtual ~CompositableHost()
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{
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MOZ_COUNT_DTOR(CompositableHost);
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}
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static TemporaryRef<CompositableHost> Create(const TextureInfo& aTextureInfo);
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virtual CompositableType GetType() = 0;
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virtual void SetCompositor(Compositor* aCompositor)
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{
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mCompositor = aCompositor;
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}
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// composite the contents of this buffer host to the compositor's surface
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virtual void Composite(EffectChain& aEffectChain,
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float aOpacity,
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const gfx::Matrix4x4& aTransform,
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const gfx::Point& aOffset,
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const gfx::Filter& aFilter,
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const gfx::Rect& aClipRect,
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const nsIntRegion* aVisibleRegion = nullptr,
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TiledLayerProperties* aLayerProperties = nullptr) = 0;
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/**
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* @return true if we should schedule a composition.
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*/
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virtual bool Update(const SurfaceDescriptor& aImage,
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SurfaceDescriptor* aResult = nullptr);
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/**
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* Update the content host.
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* aUpdated is the region which should be updated
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* aUpdatedRegionBack is the region in aNewBackResult which has been updated
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*/
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virtual void UpdateThebes(const ThebesBufferData& aData,
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const nsIntRegion& aUpdated,
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const nsIntRegion& aOldValidRegionBack,
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nsIntRegion* aUpdatedRegionBack)
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{
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MOZ_ASSERT(false, "should be implemented or not used");
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}
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/**
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* Update the content host using a surface that only contains the updated
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* region.
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*
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* Takes ownership of aSurface, and is responsible for freeing it.
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*
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* @param aTextureId Texture to update.
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* @param aSurface Surface containing the update area. Its contents are relative
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* to aUpdated.TopLeft()
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* @param aUpdated Area of the content host to update.
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* @param aBufferRect New area covered by the content host.
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* @param aBufferRotation New buffer rotation.
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*/
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virtual void UpdateIncremental(TextureIdentifier aTextureId,
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SurfaceDescriptor& aSurface,
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const nsIntRegion& aUpdated,
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const nsIntRect& aBufferRect,
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const nsIntPoint& aBufferRotation)
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{
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MOZ_ASSERT(false, "should be implemented or not used");
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}
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/**
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* Ensure that a suitable texture host exists in this compositable. The
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* compositable host may or may not create a new texture host. If a texture
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* host is replaced, then the compositable is responsible for enusring it is
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* destroyed correctly (without leaking resources).
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* aTextureId - identifies the texture within the compositable, how the
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* compositable chooses to use this is between the compositable client and
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* host and will vary between types of compositable.
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* aSurface - the new or existing texture host should support surface
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* descriptors of the same type and, if necessary, this specific surface
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* descriptor. Whether it is necessary or not depends on the protocol between
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* the compositable client and host.
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* aAllocator - the allocator used to allocate and de-allocate resources.
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* aTextureInfo - contains flags for the texture.
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*/
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virtual void EnsureTextureHost(TextureIdentifier aTextureId,
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const SurfaceDescriptor& aSurface,
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ISurfaceAllocator* aAllocator,
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const TextureInfo& aTextureInfo) = 0;
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/**
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* Ensure that a suitable texture host exists in this compsitable.
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*
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* Only used with ContentHostIncremental.
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*
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* No SurfaceDescriptor or TextureIdentifier is provider as we
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* don't have a single surface for the texture contents, and we
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* need to allocate our own one to be updated later.
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*/
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virtual void EnsureTextureHostIncremental(ISurfaceAllocator* aAllocator,
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const TextureInfo& aTextureInfo,
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const nsIntRect& aBufferRect)
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{
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MOZ_ASSERT(false, "should be implemented or not used");
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}
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virtual TextureHost* GetTextureHost() { return nullptr; }
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virtual LayerRenderState GetRenderState() = 0;
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virtual void SetPictureRect(const nsIntRect& aPictureRect)
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{
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MOZ_ASSERT(false, "Should have been overridden");
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}
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/**
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* Adds a mask effect using this texture as the mask, if possible.
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* @return true if the effect was added, false otherwise.
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*/
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bool AddMaskEffect(EffectChain& aEffects,
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const gfx::Matrix4x4& aTransform,
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bool aIs3D = false);
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Compositor* GetCompositor() const
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{
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return mCompositor;
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}
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Layer* GetLayer() const { return mLayer; }
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void SetLayer(Layer* aLayer) { mLayer = aLayer; }
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virtual TiledLayerComposer* AsTiledLayerComposer() { return nullptr; }
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virtual void Attach(Layer* aLayer, Compositor* aCompositor)
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{
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MOZ_ASSERT(aCompositor, "Compositor is required");
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SetCompositor(aCompositor);
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SetLayer(aLayer);
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}
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void Detach() {
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SetLayer(nullptr);
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SetCompositor(nullptr);
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}
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virtual void Dump(FILE* aFile=NULL,
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const char* aPrefix="",
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bool aDumpHtml=false) { }
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static void DumpTextureHost(FILE* aFile, TextureHost* aTexture);
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#ifdef MOZ_DUMP_PAINTING
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virtual already_AddRefed<gfxImageSurface> GetAsSurface() { return nullptr; }
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#endif
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#ifdef MOZ_LAYERS_HAVE_LOG
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virtual void PrintInfo(nsACString& aTo, const char* aPrefix) { }
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#endif
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protected:
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TextureInfo mTextureInfo;
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Compositor* mCompositor;
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Layer* mLayer;
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};
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class CompositableParentManager;
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class CompositableParent : public PCompositableParent
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{
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public:
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CompositableParent(CompositableParentManager* aMgr,
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const TextureInfo& aTextureInfo,
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uint64_t aID = 0);
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~CompositableParent();
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virtual void ActorDestroy(ActorDestroyReason why) MOZ_OVERRIDE;
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CompositableHost* GetCompositableHost() const
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{
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return mHost;
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}
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void SetCompositableHost(CompositableHost* aHost)
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{
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mHost = aHost;
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}
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CompositableType GetType() const
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{
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return mType;
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}
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CompositableParentManager* GetCompositableManager() const
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{
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return mManager;
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}
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void SetCompositorID(uint64_t aCompositorID)
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{
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mCompositorID = aCompositorID;
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}
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uint64_t GetCompositorID() const
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{
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return mCompositorID;
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}
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private:
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RefPtr<CompositableHost> mHost;
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CompositableParentManager* mManager;
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CompositableType mType;
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uint64_t mID;
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uint64_t mCompositorID;
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};
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/**
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* Global CompositableMap, to use in the compositor thread only.
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*
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* PCompositable and PLayer can, in the case of async textures, be managed by
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* different top level protocols. In this case they don't share the same
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* communication channel and we can't send an OpAttachCompositable (PCompositable,
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* PLayer) message.
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*
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* In order to attach a layer and the right compositable if the the compositable
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* is async, we store references to the async compositables in a CompositableMap
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* that is accessed only on the compositor thread. During a layer transaction we
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* send the message OpAttachAsyncCompositable(ID, PLayer), and on the compositor
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* side we lookup the ID in the map and attach the correspondig compositable to
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* the layer.
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*
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* CompositableMap must be global because the image bridge doesn't have any
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* reference to whatever we have created with PLayerTransaction. So, the only way to
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* actually connect these two worlds is to have something global that they can
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* both query (in the same thread). The map is not allocated the map on the
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* stack to avoid the badness of static initialization.
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*
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* Also, we have a compositor/PLayerTransaction protocol/etc. per layer manager, and the
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* ImageBridge is used by all the existing compositors that have a video, so
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* there isn't an instance or "something" that lives outside the boudaries of a
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* given layer manager on the compositor thread except the image bridge and the
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* thread itself.
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*/
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namespace CompositableMap {
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void Create();
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void Destroy();
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CompositableParent* Get(uint64_t aID);
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void Set(uint64_t aID, CompositableParent* aParent);
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void Erase(uint64_t aID);
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void Clear();
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} // CompositableMap
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} // namespace
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} // namespace
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#endif
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