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https://gitlab.winehq.org/wine/wine-gecko.git
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a20f8323fe
Offset fixed layers in the compositor so that the toolbar in Firefox for Android doesn't obscure them. This does not affect layout, so input on the elements in said layers will appear broken.
319 lines
11 KiB
C++
319 lines
11 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(gfxPoint aTranslation = gfxPoint(),
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gfxSize aScale = gfxSize(1, 1))
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: mTranslation(aTranslation)
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, mScale(aScale)
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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(mScale.width, mScale.height, 1) *
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gfx3DMatrix::Translation(mTranslation.x, mTranslation.y, 0);
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}
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gfxPoint mTranslation;
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gfxSize mScale;
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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 bool RecvMakeSnapshot(const SurfaceDescriptor& aInSnapshot,
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SurfaceDescriptor* aOutSnapshot);
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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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/**
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* This forces the is-first-paint flag to true. This is intended to
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* be called by the widget code when it loses its viewport information
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* (or for whatever reason wants to refresh the viewport information).
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* The information refresh happens because the compositor will call
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* SetFirstPaintViewport on the next frame of composition.
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*/
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void ForceIsFirstPaint() { mIsFirstPaint = true; }
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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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/**
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* Returns true if a surface was obtained and the resume succeeded; false
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* otherwise.
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*/
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bool 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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/**
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* Release disposable memory. This will clear the tile store (stale tiles).
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*/
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bool
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RecvMemoryPressure();
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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 ComposeToTarget(gfxContext* aTarget);
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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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gfx::Margin& aFixedLayerMargins);
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void SetEGLSurfaceSize(int width, int height);
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// If SetPanZoomControllerForLayerTree is not set, Compositor will use
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// derived class AsyncPanZoomController transformations.
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// Compositor will not own AsyncPanZoomController here.
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virtual AsyncPanZoomController* GetDefaultPanZoomController() { return nullptr; }
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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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void ForceComposition();
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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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void TransformScrollableLayer(Layer* aLayer, const gfx3DMatrix& aRootTransform);
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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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/**
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* Return true if current state allows compositing, that is
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* finishing a layers transaction.
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*/
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bool CanComposite();
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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 gfxSize& aScaleDiff,
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const gfx::Margin& aFixedLayerMargins);
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virtual PGrallocBufferParent* AllocPGrallocBuffer(
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const gfxIntSize&, const uint32_t&, const uint32_t&,
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MaybeMagicGrallocBufferHandle*) MOZ_OVERRIDE
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{ return nullptr; }
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virtual bool DeallocPGrallocBuffer(PGrallocBufferParent*)
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{ return false; }
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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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// 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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bool mOverrideComposeReadiness;
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CancelableTask* mForceCompositionTask;
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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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