333 lines
15 KiB
C++
333 lines
15 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
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*
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* This library is open source and may be redistributed and/or modified under
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* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
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* (at your option) any later version. The full license is in LICENSE file
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* included with this distribution, and on the openscenegraph.org website.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* OpenSceneGraph Public License for more details.
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*/
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#ifndef OSGUTIL_INCREMENTALCOMPILEOPERATOR
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#define OSGUTIL_INCREMENTALCOMPILEOPERATOR
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#include <osgUtil/GLObjectsVisitor>
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#include <osg/Geometry>
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namespace osgUtil {
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class OSGUTIL_EXPORT StateToCompile : public osg::NodeVisitor
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{
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public:
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StateToCompile(GLObjectsVisitor::Mode mode, osg::Object* markerObject);
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typedef std::set<osg::Drawable*> DrawableSet;
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typedef std::set<osg::StateSet*> StateSetSet;
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typedef std::set<osg::Texture*> TextureSet;
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typedef std::set<osg::Program*> ProgramSet;
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DrawableSet _drawablesHandled;
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StateSetSet _statesetsHandled;
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GLObjectsVisitor::Mode _mode;
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DrawableSet _drawables;
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TextureSet _textures;
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ProgramSet _programs;
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bool _assignPBOToImages;
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osg::ref_ptr<osg::PixelBufferObject> _pbo;
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osg::ref_ptr<osg::Object> _markerObject;
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bool empty() const { return _textures.empty() && _programs.empty() && _drawables.empty(); }
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virtual void apply(osg::Node& node);
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virtual void apply(osg::Drawable& drawable);
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virtual void apply(osg::StateSet& stateset);
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virtual void apply(osg::Texture& texture);
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};
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class OSGUTIL_EXPORT IncrementalCompileOperation : public osg::GraphicsOperation
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{
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public:
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IncrementalCompileOperation();
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/** Return true if the IncrementCompileOperation is active.*/
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bool isActive() const { return !_contexts.empty(); }
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bool requiresCompile(StateToCompile& stateToCompile);
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/** Set the target frame rate that the IncrementalCompileOperation should assume.
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* Typically one would set this to the value refresh rate of your display system i.e. 60Hz.
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* Default value is 100.
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* Usage notes. The TargetFrameRate and the MinimumTimeAvailableForGLCompileAndDeletePerFrame
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* parameters are not directly used by IncrementalCompileOperation, but are should be used as a guide for how
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* long to set aside per frame for compiling and deleting OpenGL objects. The longer amount of
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* time to set aside the faster databases will be paged in but with increased chance of frame drops,
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* the lower the amount of time the set aside the slower databases will paged it but with better
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* chance of avoid any frame drops. The default values are chosen to achieve the later when running
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* on a modern mid to high end PC.
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* The way to compute the amount of available time use a scheme such as :
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* availableTime = maximum(1.0/targetFrameRate - timeTakenDuringUpdateCullAndDraw, minimumTimeAvailableForGLCompileAndDeletePerFrame).
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*/
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void setTargetFrameRate(double tfr) { _targetFrameRate = tfr; }
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/** Get the target frame rate that the IncrementalCompileOperation should assume.*/
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double getTargetFrameRate() const { return _targetFrameRate; }
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/** Set the minimum amount of time (in seconds) that should be made available for compiling and delete OpenGL objects per frame.
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* Default value is 0.001 (1 millisecond).
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* For usage see notes in setTargetFrameRate.*/
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void setMinimumTimeAvailableForGLCompileAndDeletePerFrame(double ta) { _minimumTimeAvailableForGLCompileAndDeletePerFrame = ta; }
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/** Get the minimum amount of time that should be made available for compiling and delete OpenGL objects per frame.
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* For usage see notes in setTargetFrameRate.*/
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double getMinimumTimeAvailableForGLCompileAndDeletePerFrame() const { return _minimumTimeAvailableForGLCompileAndDeletePerFrame; }
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/** Set the maximum number of OpenGL objects that the page should attempt to compile per frame.
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* Note, Lower values reduces chances of a frame drop but lower the rate that database will be paged in at.
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* Default value is 8. */
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void setMaximumNumOfObjectsToCompilePerFrame(unsigned int num) { _maximumNumOfObjectsToCompilePerFrame = num; }
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/** Get the maximum number of OpenGL objects that the page should attempt to compile per frame.*/
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unsigned int getMaximumNumOfObjectsToCompilePerFrame() const { return _maximumNumOfObjectsToCompilePerFrame; }
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/** FlushTimeRatio governs how much of the spare time in each frame is used for flushing deleted OpenGL objects.
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* Default value is 0.5, valid range is 0.1 to 0.9.*/
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void setFlushTimeRatio(double ratio) { _flushTimeRatio = ratio; }
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double getFlushTimeRatio() const { return _flushTimeRatio; }
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/** ConservativeTimeRatio governs how much of the measured spare time in each frame is used for flushing deleted and compile new OpenGL objects.
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* Default value is 0.5, valid range is 0.1 to 1.0.
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* A ratio near 1.0 will lead to paged databases being compiled and merged quicker but increase the chances of frame drop.
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* A ratio near 0.1 will lead to paged databases being compiled and merged closer but reduce the chances of frame drop.*/
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void setConservativeTimeRatio(double ratio) { _conservativeTimeRatio = ratio; }
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double getConservativeTimeRatio() const { return _conservativeTimeRatio; }
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/** Assign a geometry and associated StateSet than is applied after each texture compile to atttempt to force the OpenGL
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* drive to download the texture object to OpenGL graphics card.*/
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void assignForceTextureDownloadGeometry();
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/** Set the osg::Geometry to apply after each texture compile to atttempt to force the OpenGL
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* drive to download the texture object to OpenGL graphics card.*/
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void setForceTextureDownloadGeometry(osg::Geometry* geom) { _forceTextureDownloadGeometry = geom; }
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osg::Geometry* getForceTextureDownloadGeometry() { return _forceTextureDownloadGeometry.get(); }
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const osg::Geometry* getForceTextureDownloadGeometry() const { return _forceTextureDownloadGeometry.get(); }
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typedef std::vector<osg::GraphicsContext*> Contexts;
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void assignContexts(Contexts& contexts);
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void removeContexts(Contexts& contexts);
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void addGraphicsContext(osg::GraphicsContext* gc);
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void removeGraphicsContext(osg::GraphicsContext* gc);
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typedef std::set<osg::GraphicsContext*> ContextSet;
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ContextSet& getContextSet() { return _contexts; }
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const ContextSet& getContextSet() const { return _contexts; }
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/** Merge subgraphs that have been compiled.*/
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void mergeCompiledSubgraphs(const osg::FrameStamp* frameStamp);
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/** Set the current frame number that the IncrementalCompileOperation should use as a reference
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* value for calculations based on current frame number.
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* Note, this value is set by the mergeCompiledSubgraphs(..) method so one won't normally need to call
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* set the CurrentFrameNumber manually.*/
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void setCurrentFrameNumber(unsigned int fn) { _currentFrameNumber = fn; }
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unsigned int getCurrentFrameNumber() const { return _currentFrameNumber; }
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/** tell the IncrementalCompileOperation to compile all pending objects during next draw traversal,
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* for specified number of frames.*/
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void compileAllForNextFrame(unsigned int numFramesToDoCompileAll=1);
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/** tell the IncrementalCompileOperation to compile all pending objects during next draw traversal,
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* till specified frame number.*/
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void setCompileAllTillFrameNumber(unsigned int fn) { _compileAllTillFrameNumber = fn; }
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unsigned int getCompileAllTillFrameNumber() const { return _compileAllTillFrameNumber; }
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virtual void operator () (osg::GraphicsContext* context);
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struct OSGUTIL_EXPORT CompileInfo : public osg::RenderInfo
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{
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CompileInfo(osg::GraphicsContext* context, IncrementalCompileOperation* ico);
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bool okToCompile(double estimatedTimeForCompile=0.0) const
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{
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if (compileAll) return true;
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if (maxNumObjectsToCompile==0) return false;
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return (allocatedTime - timer.elapsedTime()) >= estimatedTimeForCompile;
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}
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IncrementalCompileOperation* incrementalCompileOperation;
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bool compileAll;
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unsigned int maxNumObjectsToCompile;
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double allocatedTime;
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osg::ElapsedTime timer;
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};
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struct CompileOp : public osg::Referenced
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{
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/** return an estimate for how many seconds the compile will take.*/
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virtual double estimatedTimeForCompile(CompileInfo& compileInfo) const = 0;
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/** compile associated objects, return true if object as been fully compiled and this CompileOp can be removed from the to compile list.*/
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virtual bool compile(CompileInfo& compileInfo) = 0;
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};
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struct OSGUTIL_EXPORT CompileDrawableOp : public CompileOp
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{
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CompileDrawableOp(osg::Drawable* drawable);
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double estimatedTimeForCompile(CompileInfo& compileInfo) const;
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bool compile(CompileInfo& compileInfo);
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osg::ref_ptr<osg::Drawable> _drawable;
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};
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struct OSGUTIL_EXPORT CompileTextureOp : public CompileOp
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{
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CompileTextureOp(osg::Texture* texture);
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double estimatedTimeForCompile(CompileInfo& compileInfo) const;
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bool compile(CompileInfo& compileInfo);
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osg::ref_ptr<osg::Texture> _texture;
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};
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struct OSGUTIL_EXPORT CompileProgramOp : public CompileOp
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{
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CompileProgramOp(osg::Program* program);
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double estimatedTimeForCompile(CompileInfo& compileInfo) const;
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bool compile(CompileInfo& compileInfo);
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osg::ref_ptr<osg::Program> _program;
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};
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class OSGUTIL_EXPORT CompileList
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{
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public:
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CompileList();
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~CompileList();
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bool empty() const { return _compileOps.empty(); }
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void add(CompileOp* compileOp);
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void add(osg::Drawable* drawable) { add(new CompileDrawableOp(drawable)); }
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void add(osg::Texture* texture) { add(new CompileTextureOp(texture)); }
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void add(osg::Program* program) { add(new CompileProgramOp(program)); }
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double estimatedTimeForCompile(CompileInfo& compileInfo) const;
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bool compile(CompileInfo& compileInfo);
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typedef std::list< osg::ref_ptr<CompileOp> > CompileOps;
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CompileOps _compileOps;
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};
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class CompileSet;
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struct CompileCompletedCallback : public virtual osg::Referenced
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{
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/// return true if the callback assumes responsibility for merging any associated subgraphs with the main scene graph
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/// return false if callback doesn't handle the merge, and instead requires the IncrementalCompileOperation to handle this for us
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virtual bool compileCompleted(CompileSet* compileSet) = 0;
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};
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class OSGUTIL_EXPORT CompileSet : public osg::Referenced
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{
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public:
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CompileSet() {}
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CompileSet(osg::Node*subgraphToCompile):
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_subgraphToCompile(subgraphToCompile) {}
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CompileSet(osg::Group* attachmentPoint, osg::Node* subgraphToCompile):
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_attachmentPoint(attachmentPoint),
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_subgraphToCompile(subgraphToCompile) {}
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void buildCompileMap(ContextSet& contexts, StateToCompile& stateToCompile);
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void buildCompileMap(ContextSet& contexts, GLObjectsVisitor::Mode mode=GLObjectsVisitor::COMPILE_DISPLAY_LISTS|GLObjectsVisitor::COMPILE_STATE_ATTRIBUTES);
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bool compile(CompileInfo& compileInfo);
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bool compiled() const { return _numberCompileListsToCompile==0; }
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OpenThreads::Atomic _numberCompileListsToCompile;
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osg::observer_ptr<osg::Group> _attachmentPoint;
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osg::ref_ptr<osg::Node> _subgraphToCompile;
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osg::ref_ptr<CompileCompletedCallback> _compileCompletedCallback;
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typedef std::map<osg::GraphicsContext*, CompileList > CompileMap;
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CompileMap _compileMap;
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osg::ref_ptr<osg::Object> _markerObject;
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protected:
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virtual ~CompileSet() {}
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};
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typedef std::list< osg::ref_ptr<CompileSet> > CompileSets;
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/** Add a subgraph to be compiled.*/
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void add(osg::Node* subgraphToCompile);
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/** Add a subgraph to be compiled and add automatically to attachPoint on call to mergeCompiledSubgraphs.*/
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void add(osg::Group* attachmentPoint, osg::Node* subgraphToCompile);
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/** Add a CompileSet to be compiled.*/
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void add(CompileSet* compileSet, bool callBuildCompileMap=true);
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/** Remove CompileSet from list.*/
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void remove(CompileSet* compileSet);
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OpenThreads::Mutex* getToCompiledMutex() { return &_toCompileMutex; }
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CompileSets& getToCompile() { return _toCompile; }
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OpenThreads::Mutex* getCompiledMutex() { return &_compiledMutex; }
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CompileSets& getCompiled() { return _compiled; }
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void setMarkerObject(osg::Object* mo) { _markerObject = mo; }
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osg::Object* getMarkerObject() { return _markerObject.get(); }
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const osg::Object* getMarkerObject() const { return _markerObject.get(); }
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protected:
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virtual ~IncrementalCompileOperation();
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void compileSets(CompileSets& toCompile, CompileInfo& compileInfo);
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double _targetFrameRate;
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double _minimumTimeAvailableForGLCompileAndDeletePerFrame;
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unsigned int _maximumNumOfObjectsToCompilePerFrame;
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double _flushTimeRatio;
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double _conservativeTimeRatio;
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unsigned int _currentFrameNumber;
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unsigned int _compileAllTillFrameNumber;
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osg::ref_ptr<osg::Geometry> _forceTextureDownloadGeometry;
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OpenThreads::Mutex _toCompileMutex;
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CompileSets _toCompile;
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OpenThreads::Mutex _compiledMutex;
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CompileSets _compiled;
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ContextSet _contexts;
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osg::ref_ptr<osg::Object> _markerObject;
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};
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}
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#endif
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