FGFS-4.1/OpenSceneGraph
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Introduce new run frame rate management support to allow control of maximum frame rate and to support on demand rendering of frames

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This commit is contained in:
Robert Osfield
2009-04-24 16:20:50 +00:00
parent 860ae27faf
commit a50f0ccfaf
10 changed files with 198 additions and 57 deletions
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42
include/osgViewer/ViewerBase
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@@ -199,14 +199,27 @@ class OSGVIEWER_EXPORT ViewerBase : public virtual osg::Object
/** Check to see if windows are still open, if not set viewer done to true. */
void checkWindowStatus();
enum FrameScheme
{
ON_DEMAND,
CONTINUOUS
};
void setRunFrameScheme(FrameScheme fs) { _runFrameScheme = fs; }
FrameScheme getRunFrameScheme() const { return _runFrameScheme; }
void setRunMaxFrameRate(double frameRate) { _runMaxFrameRate = frameRate; }
double getRunMaxFrameRate() const { return _runMaxFrameRate; }
/** Execute a main frame loop.
* Equivalent to while (!viewer.done()) viewer.frame();
* Also calls realize() if the viewer is not already realized,
* and installs trackball manipulator if one is not already assigned.
*/
virtual int run() = 0;
virtual int run();
/** check to see if the new frame is required, called by run(..) when FrameScheme is set to ON_DEMAND.*/
virtual bool checkNeedToDoFrame() = 0;
/** Render a complete new frame.
* Calls advance(), eventTraversal(), updateTraversal(), renderingTraversals(). */
@@ -249,16 +262,20 @@ class OSGVIEWER_EXPORT ViewerBase : public virtual osg::Object
virtual void getUsage(osg::ApplicationUsage& usage) const = 0;
protected:
void viewerBaseInit();
friend class osgViewer::View;
inline void makeCurrent(osg::GraphicsContext* gc)
{
if (_currentContext==gc) return;
releaseContext();
if (gc && gc->valid() && gc->makeCurrent()) _currentContext = gc;
}
inline void releaseContext()
{
if (_currentContext.valid() && _currentContext->valid())
@@ -275,21 +292,28 @@ class OSGVIEWER_EXPORT ViewerBase : public virtual osg::Object
int _keyEventSetsDone;
bool _quitEventSetsDone;
bool _releaseContextAtEndOfFrameHint;
ThreadingModel _threadingModel;
bool _threadsRunning;
bool _requestRedraw;
bool _requestContinousUpdate;
FrameScheme _runFrameScheme;
double _runMaxFrameRate;
BarrierPosition _endBarrierPosition;
osg::ref_ptr<osg::BarrierOperation> _startRenderingBarrier;
osg::ref_ptr<osg::BarrierOperation> _endRenderingDispatchBarrier;
osg::ref_ptr<osg::EndOfDynamicDrawBlock> _endDynamicDrawBlock;
osg::ref_ptr<osgGA::EventVisitor> _eventVisitor;
osg::ref_ptr<osg::OperationQueue> _updateOperations;
osg::ref_ptr<osgUtil::UpdateVisitor> _updateVisitor;
osg::ref_ptr<osg::Operation> _realizeOperation;
osg::ref_ptr<osgUtil::IncrementalCompileOperation> _incrementalCompileOperation;