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354 lines
11 KiB
C++
354 lines
11 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 GFX_CONTENTHOST_H
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#define GFX_CONTENTHOST_H
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#include "ThebesLayerBuffer.h"
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#include "CompositableHost.h"
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namespace mozilla {
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namespace layers {
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class ThebesBuffer;
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class OptionalThebesBuffer;
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struct TexturedEffect;
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/**
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* ContentHosts are used for compositing Thebes layers, always matched by a
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* ContentClient of the same type.
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*
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* ContentHosts support only UpdateThebes(), not Update().
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*/
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class ContentHost : public CompositableHost
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{
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public:
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// Subclasses should implement this method if they support being used as a
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// tiling.
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virtual TiledLayerComposer* AsTiledLayerComposer() { return nullptr; }
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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) = 0;
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virtual void SetPaintWillResample(bool aResample) { }
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protected:
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ContentHost(const TextureInfo& aTextureInfo)
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: CompositableHost(aTextureInfo)
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{}
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};
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/**
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* Base class for non-tiled ContentHosts.
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*
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* Ownership of the SurfaceDescriptor and the resources it represents is passed
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* from the ContentClient to the ContentHost when the DeprecatedTextureClient/Hosts are
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* created, that is recevied here by SetDeprecatedTextureHosts which assigns one or two
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* texture hosts (for single and double buffering) to the ContentHost.
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*
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* It is the responsibility of the ContentHost to destroy its resources when
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* they are recreated or the ContentHost dies.
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*/
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class ContentHostBase : public ContentHost
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{
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public:
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typedef ThebesLayerBuffer::ContentType ContentType;
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typedef ThebesLayerBuffer::PaintState PaintState;
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ContentHostBase(const TextureInfo& aTextureInfo);
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~ContentHostBase();
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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);
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virtual PaintState BeginPaint(ContentType, uint32_t)
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{
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NS_RUNTIMEABORT("shouldn't BeginPaint for a shadow layer");
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return PaintState();
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}
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virtual LayerRenderState GetRenderState() MOZ_OVERRIDE;
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virtual void SetCompositor(Compositor* aCompositor) MOZ_OVERRIDE;
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#ifdef MOZ_DUMP_PAINTING
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virtual already_AddRefed<gfxImageSurface> GetAsSurface();
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#endif
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virtual void Dump(FILE* aFile=nullptr,
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const char* aPrefix="",
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bool aDumpHtml=false) MOZ_OVERRIDE;
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virtual DeprecatedTextureHost* GetDeprecatedTextureHost() MOZ_OVERRIDE;
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virtual void SetPaintWillResample(bool aResample) { mPaintWillResample = aResample; }
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// The client has destroyed its texture clients and we should destroy our
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// texture hosts and SurfaceDescriptors. Note that we don't immediately
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// destroy our front buffer so that we can continue to composite.
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virtual void DestroyTextures() = 0;
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protected:
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virtual nsIntPoint GetOriginOffset()
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{
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return mBufferRect.TopLeft() - mBufferRotation;
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}
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bool PaintWillResample() { return mPaintWillResample; }
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// Destroy the front buffer's texture host. This should only happen when
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// we have a new front buffer to use or the ContentHost is going to die.
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void DestroyFrontHost();
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nsIntRect mBufferRect;
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nsIntPoint mBufferRotation;
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RefPtr<DeprecatedTextureHost> mDeprecatedTextureHost;
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RefPtr<DeprecatedTextureHost> mDeprecatedTextureHostOnWhite;
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// When we set a new front buffer DeprecatedTextureHost, we don't want to stomp on
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// the old one which might still be used for compositing. So we store it
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// here and move it to mDeprecatedTextureHost once we do the first buffer swap.
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RefPtr<DeprecatedTextureHost> mNewFrontHost;
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RefPtr<DeprecatedTextureHost> mNewFrontHostOnWhite;
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bool mPaintWillResample;
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bool mInitialised;
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};
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/**
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* Double buffering is implemented by swapping the front and back DeprecatedTextureHosts.
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*/
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class ContentHostDoubleBuffered : public ContentHostBase
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{
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public:
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ContentHostDoubleBuffered(const TextureInfo& aTextureInfo)
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: ContentHostBase(aTextureInfo)
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{}
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~ContentHostDoubleBuffered();
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virtual CompositableType GetType() { return BUFFER_CONTENT_DIRECT; }
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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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virtual void EnsureDeprecatedTextureHost(TextureIdentifier aTextureId,
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const SurfaceDescriptor& aSurface,
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ISurfaceAllocator* aAllocator,
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const TextureInfo& aTextureInfo) MOZ_OVERRIDE;
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virtual void DestroyTextures() MOZ_OVERRIDE;
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virtual void Dump(FILE* aFile=nullptr,
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const char* aPrefix="",
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bool aDumpHtml=false) MOZ_OVERRIDE;
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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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nsIntRegion mValidRegionForNextBackBuffer;
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// Texture host for the back buffer. We never read or write this buffer. We
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// only swap it with the front buffer (mDeprecatedTextureHost) when we are told by the
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// content thread.
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RefPtr<DeprecatedTextureHost> mBackHost;
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RefPtr<DeprecatedTextureHost> mBackHostOnWhite;
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};
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/**
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* Single buffered, therefore we must synchronously upload the image from the
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* DeprecatedTextureHost in the layers transaction (i.e., in UpdateThebes).
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*/
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class ContentHostSingleBuffered : public ContentHostBase
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{
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public:
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ContentHostSingleBuffered(const TextureInfo& aTextureInfo)
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: ContentHostBase(aTextureInfo)
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{}
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virtual ~ContentHostSingleBuffered();
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virtual CompositableType GetType() { return BUFFER_CONTENT; }
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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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virtual void EnsureDeprecatedTextureHost(TextureIdentifier aTextureId,
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const SurfaceDescriptor& aSurface,
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ISurfaceAllocator* aAllocator,
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const TextureInfo& aTextureInfo) MOZ_OVERRIDE;
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virtual void DestroyTextures() MOZ_OVERRIDE;
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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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};
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/**
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* Maintains a host-side only texture, and gets provided with
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* surfaces that only cover the changed pixels during an update.
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*
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* Takes ownership of the passed in update surfaces, and must
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* free them once texture upload is complete.
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*
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* Delays texture uploads until the next composite to
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* avoid blocking the main thread.
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*/
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class ContentHostIncremental : public ContentHostBase
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{
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public:
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ContentHostIncremental(const TextureInfo& aTextureInfo)
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: ContentHostBase(aTextureInfo)
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, mDeAllocator(nullptr)
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{}
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virtual CompositableType GetType() { return BUFFER_CONTENT; }
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virtual void EnsureDeprecatedTextureHostIncremental(ISurfaceAllocator* aAllocator,
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const TextureInfo& aTextureInfo,
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const nsIntRect& aBufferRect) MOZ_OVERRIDE;
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virtual void EnsureDeprecatedTextureHost(TextureIdentifier aTextureId,
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const SurfaceDescriptor& aSurface,
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ISurfaceAllocator* aAllocator,
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const TextureInfo& aTextureInfo)
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{
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NS_RUNTIMEABORT("Shouldn't call this");
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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) MOZ_OVERRIDE;
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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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NS_RUNTIMEABORT("Shouldn't call this");
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}
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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)
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{
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ProcessTextureUpdates();
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ContentHostBase::Composite(aEffectChain, aOpacity,
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aTransform, aOffset, aFilter,
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aClipRect, aVisibleRegion,
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aLayerProperties);
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}
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virtual void DestroyTextures()
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{
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mDeprecatedTextureHost = nullptr;
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mDeprecatedTextureHostOnWhite = nullptr;
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mUpdateList.Clear();
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}
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private:
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void ProcessTextureUpdates();
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class Request
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{
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public:
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Request()
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{
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MOZ_COUNT_CTOR(ContentHostIncremental::Request);
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}
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virtual ~Request()
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{
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MOZ_COUNT_DTOR(ContentHostIncremental::Request);
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}
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virtual void Execute(ContentHostIncremental *aHost) = 0;
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};
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class TextureCreationRequest : public Request
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{
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public:
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TextureCreationRequest(const TextureInfo& aTextureInfo,
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const nsIntRect& aBufferRect)
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: mTextureInfo(aTextureInfo)
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, mBufferRect(aBufferRect)
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{}
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virtual void Execute(ContentHostIncremental *aHost);
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private:
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TextureInfo mTextureInfo;
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nsIntRect mBufferRect;
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};
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class TextureUpdateRequest : public Request
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{
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public:
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TextureUpdateRequest(ISurfaceAllocator* aDeAllocator,
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TextureIdentifier aTextureId,
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SurfaceDescriptor& aDescriptor,
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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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: mDeAllocator(aDeAllocator)
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, mTextureId(aTextureId)
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, mDescriptor(aDescriptor)
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, mUpdated(aUpdated)
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, mBufferRect(aBufferRect)
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, mBufferRotation(aBufferRotation)
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{}
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~TextureUpdateRequest()
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{
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//TODO: Recycle these?
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mDeAllocator->DestroySharedSurface(&mDescriptor);
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}
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virtual void Execute(ContentHostIncremental *aHost);
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private:
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enum XSide {
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LEFT, RIGHT
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};
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enum YSide {
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TOP, BOTTOM
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};
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nsIntRect GetQuadrantRectangle(XSide aXSide, YSide aYSide) const;
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ISurfaceAllocator* mDeAllocator;
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TextureIdentifier mTextureId;
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SurfaceDescriptor mDescriptor;
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nsIntRegion mUpdated;
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nsIntRect mBufferRect;
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nsIntPoint mBufferRotation;
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};
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nsTArray<nsAutoPtr<Request> > mUpdateList;
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ISurfaceAllocator* mDeAllocator;
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};
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}
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}
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#endif
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