FGFS-4.1/OpenSceneGraph
4
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Further work on GraphicsContext/GraphicsThread

Browse Source
This commit is contained in:
Robert Osfield
2005-08-20 08:59:03 +00:00
parent f07b24e56b
commit ac07e07705
10 changed files with 582 additions and 295 deletions
Download Patch File Download Diff File Expand all files Collapse all files

28
include/osg/GraphicsThread
View File

@@ -79,8 +79,7 @@ class Block: public osg::Referenced {
class GraphicsThread : public Referenced, public OpenThreads::Thread
{
public:
GraphicsThread(): _graphicsContext(0) {}
GraphicsThread();
/** Base class for implementing GraphicsThread operations.*/
struct OSG_EXPORT Operation : public Referenced
@@ -92,7 +91,11 @@ class GraphicsThread : public Referenced, public OpenThreads::Thread
* executed by the graphics thread once this operation gets to the head of the queue.*/
void add(Operation* operation, bool waitForCompletion=false);
/** Run does the graphics thread run loop.*/
virtual void run();
/** Cancel this graphics thread.*/
virtual int cancel();
protected:
@@ -102,14 +105,18 @@ class GraphicsThread : public Referenced, public OpenThreads::Thread
GraphicsContext* _graphicsContext;
typedef std::list< ref_ptr<Operation> > OperationQueue;
OpenThreads::Mutex _operationsMutex;
OperationQueue _operations;
bool _done;
OpenThreads::Mutex _operationsMutex;
osg::ref_ptr<osg::Block> _operationsBlock;
OperationQueue _operations;
};
/** SwapBufferOperation calls swap buffers on the GraphicsContext.*/
struct OSG_EXPORT SwapBufferOperation : public GraphicsThread::Operation
struct OSG_EXPORT SwapBuffersOperation : public GraphicsThread::Operation
{
virtual void operator () (GraphicsContext* context);
};
@@ -117,9 +124,18 @@ struct OSG_EXPORT SwapBufferOperation : public GraphicsThread::Operation
/** BarrierOperation allows one syncronize multiple GraphicsThreads with each other.*/
struct OSG_EXPORT BarrierOperation : public GraphicsThread::Operation, public OpenThreads::Barrier
{
BarrierOperation(int numThreads=0): OpenThreads::Barrier(numThreads) {}
enum PreBlockOp
{
NO_OPERATION,
GL_FLUSH,
GL_FINISH
};
BarrierOperation(int numThreads, PreBlockOp op=NO_OPERATION): OpenThreads::Barrier(numThreads), _preBlockOp(op) {}
virtual void operator () (GraphicsContext* context);
PreBlockOp _preBlockOp;
};
/** ReleaseContext_Block_MakeCurrentOperation releases the context for another thread to aquire,