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303 lines
9.3 KiB
C++
303 lines
9.3 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_LayerManagerComposite_H
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#define GFX_LayerManagerComposite_H
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#include "mozilla/layers/Compositor.h"
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#include "mozilla/layers/ShadowLayers.h"
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#include "Composer2D.h"
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#include "mozilla/TimeStamp.h"
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#ifdef XP_WIN
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#include <windows.h>
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#endif
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#include "gfxContext.h"
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#include "gfx3DMatrix.h"
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namespace mozilla {
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namespace layers {
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class LayerComposite;
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class ShadowThebesLayer;
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class ShadowContainerLayer;
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class ShadowImageLayer;
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class ShadowCanvasLayer;
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class ShadowColorLayer;
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class CompositableHost;
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/**
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* Composite layers are for use with OMTC on the compositor thread only. There
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* must be corresponding Basic layers on the content thread. For composite
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* layers, the layer manager only maintains the layer tree, all rendering is
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* done by a Compositor (see Compositor.h). As such, composite layers are
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* platform-independent and can be used on any platform for which there is a
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* Compositor implementation.
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*
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* The composite layer tree reflects exactly the basic layer tree. To
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* composite to screen, the layer manager walks the layer tree calling render
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* methods which in turn call into their CompositableHosts' Composite methods.
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* These call Compositor::DrawQuad to do the rendering.
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*
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* Mostly, layers are updated during the layers transaction. This is done from
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* CompositableClient to CompositableHost without interacting with the layer.
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*
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* mCompositor is stored in ShadowLayerManager.
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*
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* Post-landing TODO: merge LayerComposite with ShadowLayer
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*/
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class THEBES_API LayerManagerComposite : public ShadowLayerManager
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{
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public:
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LayerManagerComposite(Compositor* aCompositor);
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virtual ~LayerManagerComposite()
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{
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Destroy();
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}
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virtual void Destroy();
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/**
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* return True if initialization was succesful, false when it was not.
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*/
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bool Initialize();
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/**
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* Sets the clipping region for this layer manager. This is important on
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* windows because using OGL we no longer have GDI's native clipping. Therefor
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* widget must tell us what part of the screen is being invalidated,
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* and we should clip to this.
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*
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* \param aClippingRegion Region to clip to. Setting an empty region
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* will disable clipping.
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*/
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void SetClippingRegion(const nsIntRegion& aClippingRegion)
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{
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mClippingRegion = aClippingRegion;
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}
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/**
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* LayerManager implementation.
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*/
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virtual ShadowLayerManager* AsShadowManager() MOZ_OVERRIDE
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{
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return this;
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}
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void UpdateRenderBounds(const nsIntRect& aRect);
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void BeginTransaction() MOZ_OVERRIDE;
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void BeginTransactionWithTarget(gfxContext* aTarget) MOZ_OVERRIDE;
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virtual void NotifyShadowTreeTransaction() MOZ_OVERRIDE
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{
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mCompositor->NotifyLayersTransaction();
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}
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virtual bool EndEmptyTransaction(EndTransactionFlags aFlags = END_DEFAULT) MOZ_OVERRIDE;
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virtual void EndTransaction(DrawThebesLayerCallback aCallback,
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void* aCallbackData,
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EndTransactionFlags aFlags = END_DEFAULT) MOZ_OVERRIDE;
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virtual void SetRoot(Layer* aLayer) MOZ_OVERRIDE { mRoot = aLayer; }
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virtual bool CanUseCanvasLayerForSize(const gfxIntSize &aSize) MOZ_OVERRIDE
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{
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return mCompositor->CanUseCanvasLayerForSize(aSize);
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}
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virtual TextureFactoryIdentifier GetTextureFactoryIdentifier() MOZ_OVERRIDE
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{
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return mCompositor->GetTextureFactoryIdentifier();
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}
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virtual int32_t GetMaxTextureSize() const MOZ_OVERRIDE
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{
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return mCompositor->GetMaxTextureSize();
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}
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virtual void ClearCachedResources(Layer* aSubtree = nullptr) MOZ_OVERRIDE;
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virtual already_AddRefed<ThebesLayer> CreateThebesLayer() MOZ_OVERRIDE;
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virtual already_AddRefed<ContainerLayer> CreateContainerLayer() MOZ_OVERRIDE;
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virtual already_AddRefed<ImageLayer> CreateImageLayer() MOZ_OVERRIDE;
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virtual already_AddRefed<ColorLayer> CreateColorLayer() MOZ_OVERRIDE;
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virtual already_AddRefed<CanvasLayer> CreateCanvasLayer() MOZ_OVERRIDE;
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virtual already_AddRefed<ShadowThebesLayer> CreateShadowThebesLayer() MOZ_OVERRIDE;
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virtual already_AddRefed<ShadowContainerLayer> CreateShadowContainerLayer() MOZ_OVERRIDE;
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virtual already_AddRefed<ShadowImageLayer> CreateShadowImageLayer() MOZ_OVERRIDE;
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virtual already_AddRefed<ShadowColorLayer> CreateShadowColorLayer() MOZ_OVERRIDE;
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virtual already_AddRefed<ShadowCanvasLayer> CreateShadowCanvasLayer() MOZ_OVERRIDE;
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virtual already_AddRefed<ShadowRefLayer> CreateShadowRefLayer() MOZ_OVERRIDE;
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virtual LayersBackend GetBackendType() MOZ_OVERRIDE
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{
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return LAYERS_NONE;
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}
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virtual void GetBackendName(nsAString& name) MOZ_OVERRIDE
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{
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MOZ_ASSERT(false, "Shouldn't be called for composited layer manager");
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name.AssignLiteral("Composite");
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}
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virtual already_AddRefed<gfxASurface>
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CreateOptimalMaskSurface(const gfxIntSize &aSize) MOZ_OVERRIDE;
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DrawThebesLayerCallback GetThebesLayerCallback() const
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{ return mThebesLayerCallback; }
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void* GetThebesLayerCallbackData() const
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{ return mThebesLayerCallbackData; }
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/*
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* Helper functions for our layers
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*/
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void CallThebesLayerDrawCallback(ThebesLayer* aLayer,
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gfxContext* aContext,
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const nsIntRegion& aRegionToDraw)
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{
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NS_ASSERTION(mThebesLayerCallback,
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"CallThebesLayerDrawCallback without callback!");
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mThebesLayerCallback(aLayer, aContext,
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aRegionToDraw, nsIntRegion(),
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mThebesLayerCallbackData);
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}
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#ifdef MOZ_LAYERS_HAVE_LOG
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virtual const char* Name() const MOZ_OVERRIDE { return ""; }
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#endif // MOZ_LAYERS_HAVE_LOG
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enum WorldTransforPolicy {
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ApplyWorldTransform,
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DontApplyWorldTransform
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};
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/**
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* Setup World transform matrix.
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* Transform will be ignored if it is not PreservesAxisAlignedRectangles
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* or has non integer scale
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*/
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void SetWorldTransform(const gfxMatrix& aMatrix);
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gfxMatrix& GetWorldTransform(void);
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static bool AddMaskEffect(Layer* aMaskLayer,
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EffectChain& aEffect,
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bool aIs3D = false);
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/**
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* Creates a DrawTarget which is optimized for inter-operating with this
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* layermanager.
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*/
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virtual TemporaryRef<mozilla::gfx::DrawTarget>
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CreateDrawTarget(const mozilla::gfx::IntSize &aSize,
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mozilla::gfx::SurfaceFormat aFormat) MOZ_OVERRIDE;
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const nsIntSize& GetWidgetSize()
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{
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return mCompositor->GetWidgetSize();
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}
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/**
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* Calculates the 'completeness' of the rendering that intersected with the
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* screen on the last render. This is only useful when progressive tile
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* drawing is enabled, otherwise this will always return 1.0.
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* This function's expense scales with the size of the layer tree and the
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* complexity of individual layers' valid regions.
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*/
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float ComputeRenderIntegrity();
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private:
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/** Region we're clipping our current drawing to. */
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nsIntRegion mClippingRegion;
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nsIntRect mRenderBounds;
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/** Current root layer. */
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LayerComposite *RootLayer() const;
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/**
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* Recursive helper method for use by ComputeRenderIntegrity. Subtracts
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* any incomplete rendering on aLayer from aScreenRegion. Any low-precision
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* rendering is included in aLowPrecisionScreenRegion. aTransform is the
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* accumulated transform of intermediate surfaces beneath aLayer.
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*/
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static void ComputeRenderIntegrityInternal(Layer* aLayer,
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nsIntRegion& aScreenRegion,
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nsIntRegion& aLowPrecisionScreenRegion,
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const gfx3DMatrix& aTransform);
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/**
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* Render the current layer tree to the active target.
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*/
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void Render();
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void WorldTransformRect(nsIntRect& aRect);
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/** Our more efficient but less powerful alter ego, if one is available. */
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nsRefPtr<Composer2D> mComposer2D;
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/* Thebes layer callbacks; valid at the end of a transaciton,
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* while rendering */
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DrawThebesLayerCallback mThebesLayerCallback;
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void *mThebesLayerCallbackData;
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gfxMatrix mWorldMatrix;
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bool mInTransaction;
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};
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/**
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* General information and tree management for layers.
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*/
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class LayerComposite
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{
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public:
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LayerComposite(LayerManagerComposite *aManager)
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: mCompositeManager(aManager)
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, mCompositor(aManager->GetCompositor())
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, mDestroyed(false)
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{ }
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virtual ~LayerComposite() {}
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virtual LayerComposite *GetFirstChildComposite()
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{
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return nullptr;
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}
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/* Do NOT call this from the generic LayerComposite destructor. Only from the
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* concrete class destructor
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*/
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virtual void Destroy();
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virtual Layer* GetLayer() = 0;
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virtual void RenderLayer(const nsIntPoint& aOffset,
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const nsIntRect& aClipRect) = 0;
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virtual void SetCompositableHost(CompositableHost* aHost)
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{
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MOZ_ASSERT(false, "called SetCompositableHost for a layer without a compositable host");
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}
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virtual CompositableHost* GetCompositableHost() = 0;
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virtual void CleanupResources() = 0;
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virtual TiledLayerComposer* GetTiledLayerComposer() { return nullptr; }
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protected:
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LayerManagerComposite* mCompositeManager;
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RefPtr<Compositor> mCompositor;
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bool mDestroyed;
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};
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} /* layers */
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} /* mozilla */
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#endif /* GFX_LayerManagerComposite_H */
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