gecko/gfx/layers/ipc/CompositorParent.h

155 lines
5.1 KiB
C++

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set sw=4 ts=8 et tw=80 : */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef mozilla_layers_CompositorParent_h
#define mozilla_layers_CompositorParent_h
// Enable this pref to turn on compositor performance warning.
// This will print warnings if the compositor isn't meeting
// its responsiveness objectives:
// 1) Compose a frame within 15ms of receiving a ScheduleCompositeCall
// 2) Unless a frame was composited within the throttle threshold in
// which the deadline will be 15ms + throttle threshold
#define COMPOSITOR_PERFORMANCE_WARNING
#include "mozilla/layers/PCompositorParent.h"
#include "mozilla/layers/PLayersParent.h"
#include "base/thread.h"
#include "mozilla/Monitor.h"
#include "ShadowLayersManager.h"
class nsIWidget;
namespace mozilla {
namespace layers {
class LayerManager;
// Represents (affine) transforms that are calculated from a content view.
struct ViewTransform {
ViewTransform(nsIntPoint aTranslation = nsIntPoint(0, 0), float aXScale = 1, float aYScale = 1)
: mTranslation(aTranslation)
, mXScale(aXScale)
, mYScale(aYScale)
{}
operator gfx3DMatrix() const
{
return
gfx3DMatrix::ScalingMatrix(mXScale, mYScale, 1) *
gfx3DMatrix::Translation(mTranslation.x, mTranslation.y, 0);
}
nsIntPoint mTranslation;
float mXScale;
float mYScale;
};
class CompositorParent : public PCompositorParent,
public ShadowLayersManager
{
NS_INLINE_DECL_THREADSAFE_REFCOUNTING(CompositorParent)
public:
CompositorParent(nsIWidget* aWidget, MessageLoop* aMsgLoop,
PlatformThreadId aThreadID, bool aRenderToEGLSurface = false,
int aSurfaceWidth = -1, int aSurfaceHeight = -1);
virtual ~CompositorParent();
virtual bool RecvWillStop() MOZ_OVERRIDE;
virtual bool RecvStop() MOZ_OVERRIDE;
virtual bool RecvPause() MOZ_OVERRIDE;
virtual bool RecvResume() MOZ_OVERRIDE;
virtual void ShadowLayersUpdated(bool isFirstPaint) MOZ_OVERRIDE;
void Destroy();
LayerManager* GetLayerManager() { return mLayerManager; }
void SetTransformation(float aScale, nsIntPoint aScrollOffset);
void AsyncRender();
// Can be called from any thread
void ScheduleRenderOnCompositorThread();
void SchedulePauseOnCompositorThread();
void ScheduleResumeOnCompositorThread(int width, int height);
protected:
virtual PLayersParent* AllocPLayers(const LayersBackend& aBackendType, int* aMaxTextureSize);
virtual bool DeallocPLayers(PLayersParent* aLayers);
virtual void ScheduleTask(CancelableTask*, int);
virtual void Composite();
virtual void ScheduleComposition();
virtual void SetFirstPaintViewport(const nsIntPoint& aOffset, float aZoom, const nsIntRect& aPageRect, const gfx::Rect& aCssPageRect);
virtual void SetPageRect(float aZoom, const nsIntRect& aPageRect, const gfx::Rect& aCssPageRect);
virtual void SyncViewportInfo(const nsIntRect& aDisplayPort, float aDisplayResolution, bool aLayersUpdated,
nsIntPoint& aScrollOffset, float& aScaleX, float& aScaleY);
void SetEGLSurfaceSize(int width, int height);
private:
void PauseComposition();
void ResumeComposition();
void ResumeCompositionAndResize(int width, int height);
void TransformShadowTree();
inline MessageLoop* CompositorLoop();
inline PlatformThreadId CompositorThreadID();
// Platform specific functions
/**
* Does a breadth-first search to find the first layer in the tree with a
* displayport set.
*/
Layer* GetPrimaryScrollableLayer();
/**
* Recursively applies the given translation to all fixed position layers
* that aren't children of other fixed position layers.
*/
void TranslateFixedLayers(Layer* aLayer, const gfxPoint& aTranslation);
nsRefPtr<LayerManager> mLayerManager;
nsIWidget* mWidget;
CancelableTask *mCurrentCompositeTask;
TimeStamp mLastCompose;
#ifdef COMPOSITOR_PERFORMANCE_WARNING
TimeStamp mExpectedComposeTime;
#endif
bool mPaused;
float mXScale;
float mYScale;
nsIntPoint mScrollOffset;
nsIntRect mContentRect;
nsIntSize mWidgetSize;
// When this flag is set, the next composition will be the first for a
// particular document (i.e. the document displayed on the screen will change).
// This happens when loading a new page or switching tabs. We notify the
// front-end (e.g. Java on Android) about this so that it take the new page
// size and zoom into account when providing us with the next view transform.
bool mIsFirstPaint;
// This flag is set during a layers update, so that the first composition
// after a layers update has it set. It is cleared after that first composition.
bool mLayersUpdated;
MessageLoop* mCompositorLoop;
PlatformThreadId mThreadID;
bool mRenderToEGLSurface;
nsIntSize mEGLSurfaceSize;
mozilla::Monitor mPauseCompositionMonitor;
DISALLOW_EVIL_CONSTRUCTORS(CompositorParent);
};
} // layers
} // mozilla
#endif // mozilla_layers_CompositorParent_h