137 lines
3.8 KiB
C++
137 lines
3.8 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 OSG_GRAPHICSTHREAD
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#define OSG_GRAPHICSTHREAD 1
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#include <osg/OperationThread>
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#include <osg/State>
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namespace osg {
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class GraphicsContext;
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/** GraphicsThread is a helper class for running OpenGL GraphicsOperation within a single thread assigned to a specific GraphicsContext.*/
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class OSG_EXPORT GraphicsThread : public osg::OperationThread
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{
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public:
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GraphicsThread();
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/** Run does the graphics thread run loop.*/
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virtual void run();
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};
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struct OSG_EXPORT GraphicsOperation : public Operation
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{
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GraphicsOperation(const std::string& name, bool keep):
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Operation(name,keep) {}
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/** Override the standard Operation opertator and dynamic cast object to a GraphicsContext,
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* on success call operation()(GraphicsContext*).*/
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virtual void operator () (Object* object);
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virtual void operator () (GraphicsContext* context) = 0;
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};
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/** SwapBufferOperation calls swap buffers on the GraphicsContext.*/
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struct OSG_EXPORT SwapBuffersOperation : public GraphicsOperation
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{
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SwapBuffersOperation():
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GraphicsOperation("SwapBuffers",true) {}
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virtual void operator () (GraphicsContext* context);
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};
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/** BarrierOperation allows one to syncronize multiple GraphicsThreads with each other.*/
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struct OSG_EXPORT BarrierOperation : public Operation, public OpenThreads::Barrier
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{
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enum PreBlockOp
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{
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NO_OPERATION,
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GL_FLUSH,
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GL_FINISH
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};
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BarrierOperation(int numThreads, PreBlockOp op=NO_OPERATION):
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Operation("Barrier", true),
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OpenThreads::Barrier(numThreads),
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_preBlockOp(op) {}
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virtual void release();
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virtual void operator () (Object* object);
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PreBlockOp _preBlockOp;
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};
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/** ReleaseContext_Block_MakeCurrentOperation releases the context for another thread to aquire,
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* then blocks waiting for context to be released, once the block is release the context is re-aqquired.*/
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struct OSG_EXPORT ReleaseContext_Block_MakeCurrentOperation : public GraphicsOperation, public RefBlock
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{
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ReleaseContext_Block_MakeCurrentOperation():
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GraphicsOperation("ReleaseContext_Block_MakeCurrent", false) {}
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virtual void release();
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virtual void operator () (GraphicsContext* context);
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};
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struct OSG_EXPORT BlockAndFlushOperation : public GraphicsOperation, public OpenThreads::Block
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{
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BlockAndFlushOperation();
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virtual void release();
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virtual void operator () (GraphicsContext*);
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};
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struct OSG_EXPORT FlushDeletedGLObjectsOperation : public GraphicsOperation
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{
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FlushDeletedGLObjectsOperation(double availableTime, bool keep=false);
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virtual void operator () (GraphicsContext*);
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double _availableTime;
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};
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class OSG_EXPORT RunOperations : public osg::GraphicsOperation
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{
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public:
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RunOperations():
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osg::GraphicsOperation("RunOperation",true) {}
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virtual void operator () (osg::GraphicsContext* context);
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};
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class OSG_EXPORT EndOfDynamicDrawBlock : public OpenThreads::BlockCount, public osg::State::DynamicObjectRenderingCompletedCallback
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{
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public:
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EndOfDynamicDrawBlock(unsigned int);
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void completed(osg::State* state);
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protected:
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~EndOfDynamicDrawBlock() {}
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};
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}
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#endif
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