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276 lines
9.1 KiB
C++
276 lines
9.1 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set sw=4 ts=8 et tw=80 : */
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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_layers_CompositorParent_h
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#define mozilla_layers_CompositorParent_h
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// Enable this pref to turn on compositor performance warning.
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// This will print warnings if the compositor isn't meeting
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// its responsiveness objectives:
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// 1) Compose a frame within 15ms of receiving a ScheduleCompositeCall
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// 2) Unless a frame was composited within the throttle threshold in
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// which the deadline will be 15ms + throttle threshold
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//#define COMPOSITOR_PERFORMANCE_WARNING
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#include "mozilla/layers/PCompositorParent.h"
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#include "mozilla/layers/PLayersParent.h"
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#include "base/thread.h"
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#include "mozilla/Monitor.h"
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#include "mozilla/TimeStamp.h"
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#include "ShadowLayersManager.h"
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class nsIWidget;
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namespace base {
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class Thread;
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}
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namespace mozilla {
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namespace layers {
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class AsyncPanZoomController;
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class Layer;
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class LayerManager;
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// Represents (affine) transforms that are calculated from a content view.
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struct ViewTransform {
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ViewTransform(nsIntPoint aTranslation = nsIntPoint(0, 0), float aXScale = 1, float aYScale = 1)
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: mTranslation(aTranslation)
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, mXScale(aXScale)
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, mYScale(aYScale)
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{}
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operator gfx3DMatrix() const
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{
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return
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gfx3DMatrix::ScalingMatrix(mXScale, mYScale, 1) *
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gfx3DMatrix::Translation(mTranslation.x, mTranslation.y, 0);
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}
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nsIntPoint mTranslation;
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float mXScale;
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float mYScale;
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};
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class CompositorParent : public PCompositorParent,
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public ShadowLayersManager
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{
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NS_INLINE_DECL_THREADSAFE_REFCOUNTING(CompositorParent)
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public:
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CompositorParent(nsIWidget* aWidget,
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bool aRenderToEGLSurface = false,
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int aSurfaceWidth = -1, int aSurfaceHeight = -1);
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virtual ~CompositorParent();
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virtual bool RecvWillStop() MOZ_OVERRIDE;
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virtual bool RecvStop() MOZ_OVERRIDE;
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virtual bool RecvPause() MOZ_OVERRIDE;
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virtual bool RecvResume() MOZ_OVERRIDE;
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virtual void ShadowLayersUpdated(ShadowLayersParent* aLayerTree,
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const TargetConfig& aTargetConfig,
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bool isFirstPaint) MOZ_OVERRIDE;
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void Destroy();
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LayerManager* GetLayerManager() { return mLayerManager; }
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void SetTransformation(float aScale, nsIntPoint aScrollOffset);
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void AsyncRender();
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// Can be called from any thread
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void ScheduleRenderOnCompositorThread();
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void SchedulePauseOnCompositorThread();
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void ScheduleResumeOnCompositorThread(int width, int height);
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virtual void ScheduleComposition();
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void NotifyShadowTreeTransaction();
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/**
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* Returns a pointer to the compositor corresponding to the given ID.
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*/
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static CompositorParent* GetCompositor(uint64_t id);
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/**
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* Returns the compositor thread's message loop.
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*
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* This message loop is used by CompositorParent and ImageBridgeParent.
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*/
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static MessageLoop* CompositorLoop();
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/**
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* Creates the compositor thread and the global compositor map.
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*/
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static void StartUp();
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/**
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* Destroys the compositor thread and the global compositor map.
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*/
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static void ShutDown();
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/**
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* Allocate an ID that can be used to refer to a layer tree and
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* associated resources that live only on the compositor thread.
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*
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* Must run on the content main thread.
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*/
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static uint64_t AllocateLayerTreeId();
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/**
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* Release compositor-thread resources referred to by |aID|.
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*
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* Must run on the content main thread.
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*/
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static void DeallocateLayerTreeId(uint64_t aId);
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/**
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* Set aController as the pan/zoom controller for the tree referred
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* to by aLayersId.
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*
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* Must run on content main thread.
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*/
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static void SetPanZoomControllerForLayerTree(uint64_t aLayersId,
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AsyncPanZoomController* aController);
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/**
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* A new child process has been configured to push transactions
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* directly to us. Transport is to its thread context.
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*/
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static PCompositorParent*
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Create(Transport* aTransport, ProcessId aOtherProcess);
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/**
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* Setup external message loop and thread ID for Compositor.
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* Should be used when CompositorParent should work in existing thread/MessageLoop,
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* for example moving Compositor into native toolkit main thread will allow to avoid
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* extra synchronization and call ::Composite() right from toolkit::Paint event
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*/
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static void StartUpWithExistingThread(MessageLoop* aMsgLoop,
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PlatformThreadId aThreadID);
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protected:
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virtual PLayersParent* AllocPLayers(const LayersBackend& aBackendHint,
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const uint64_t& aId,
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LayersBackend* aBackend,
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int32_t* aMaxTextureSize);
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virtual bool DeallocPLayers(PLayersParent* aLayers);
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virtual void ScheduleTask(CancelableTask*, int);
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virtual void Composite();
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virtual void SetFirstPaintViewport(const nsIntPoint& aOffset, float aZoom, const nsIntRect& aPageRect, const gfx::Rect& aCssPageRect);
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virtual void SetPageRect(const gfx::Rect& aCssPageRect);
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virtual void SyncViewportInfo(const nsIntRect& aDisplayPort, float aDisplayResolution, bool aLayersUpdated,
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nsIntPoint& aScrollOffset, float& aScaleX, float& aScaleY);
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void SetEGLSurfaceSize(int width, int height);
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private:
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void PauseComposition();
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void ResumeComposition();
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void ResumeCompositionAndResize(int width, int height);
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// Sample transforms for layer trees. Return true to request
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// another animation frame.
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bool TransformShadowTree(TimeStamp aCurrentFrame);
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// Return true if an AsyncPanZoomController content transform was
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// applied for |aLayer|. *aWantNextFrame is set to true if the
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// controller wants another animation frame.
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bool ApplyAsyncContentTransformToTree(TimeStamp aCurrentFrame, Layer* aLayer,
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bool* aWantNextFrame);
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inline PlatformThreadId CompositorThreadID();
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/**
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* Creates a global map referencing each compositor by ID.
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*
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* This map is used by the ImageBridge protocol to trigger
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* compositions without having to keep references to the
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* compositor
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*/
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static void CreateCompositorMap();
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static void DestroyCompositorMap();
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/**
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* Creates the compositor thread.
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*
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* All compositors live on the same thread.
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* The thread is not lazily created on first access to avoid dealing with
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* thread safety. Therefore it's best to create and destroy the thread when
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* we know we areb't using it (So creating/destroying along with gfxPlatform
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* looks like a good place).
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*/
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static bool CreateThread();
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/**
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* Destroys the compositor thread.
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*
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* It is safe to call this fucntion more than once, although the second call
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* will have no effect.
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* This function is not thread-safe.
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*/
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static void DestroyThread();
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/**
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* Add a compositor to the global compositor map.
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*/
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static void AddCompositor(CompositorParent* compositor, uint64_t* id);
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/**
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* Remove a compositor from the global compositor map.
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*/
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static CompositorParent* RemoveCompositor(uint64_t id);
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// Platform specific functions
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/**
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* Recursively applies the given translation to all top-level fixed position
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* layers that are descendants of the given layer.
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* aScaleDiff is considered to be the scale transformation applied when
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* displaying the layers, and is used to make sure the anchor points of
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* fixed position layers remain in the same position.
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*/
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void TransformFixedLayers(Layer* aLayer,
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const gfxPoint& aTranslation,
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const gfxPoint& aScaleDiff);
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nsRefPtr<LayerManager> mLayerManager;
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nsIWidget* mWidget;
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TargetConfig mTargetConfig;
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CancelableTask *mCurrentCompositeTask;
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TimeStamp mLastCompose;
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#ifdef COMPOSITOR_PERFORMANCE_WARNING
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TimeStamp mExpectedComposeTime;
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#endif
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bool mPaused;
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float mXScale;
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float mYScale;
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nsIntPoint mScrollOffset;
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nsIntRect mContentRect;
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nsIntSize mWidgetSize;
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// When this flag is set, the next composition will be the first for a
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// particular document (i.e. the document displayed on the screen will change).
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// This happens when loading a new page or switching tabs. We notify the
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// front-end (e.g. Java on Android) about this so that it take the new page
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// size and zoom into account when providing us with the next view transform.
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bool mIsFirstPaint;
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// This flag is set during a layers update, so that the first composition
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// after a layers update has it set. It is cleared after that first composition.
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bool mLayersUpdated;
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bool mRenderToEGLSurface;
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nsIntSize mEGLSurfaceSize;
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mozilla::Monitor mPauseCompositionMonitor;
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mozilla::Monitor mResumeCompositionMonitor;
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uint64_t mCompositorID;
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DISALLOW_EVIL_CONSTRUCTORS(CompositorParent);
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};
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} // layers
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} // mozilla
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#endif // mozilla_layers_CompositorParent_h
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