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

99
src/osg/GraphicsContext.cpp
View File

@@ -113,25 +113,62 @@ void GraphicsContext::decrementContextIDUsageCount(unsigned int contextID)
GraphicsContext::GraphicsContext():
_closeOnDestruction(true),
_threadOfLastMakeCurrent(0)
{
}
GraphicsContext::~GraphicsContext()
{
// switch off the graphics thread...
setGraphicsThread(0);
if (_state.valid())
{
decrementContextIDUsageCount(_state->getContextID());
}
if (_closeOnDestruction)
{
close();
}
}
/** Realise the GraphicsContext.*/
bool GraphicsContext::realize()
{
if (realizeImplementation())
{
if (_graphicsThread.valid() && !_graphicsThread->isRunning())
{
_graphicsThread->startThread();
}
return true;
}
else
{
return false;
}
}
void GraphicsContext::close()
{
// switch off the graphics thread...
setGraphicsThread(0);
closeImplementation();
}
void GraphicsContext::makeCurrent()
{
osg::notify(osg::NOTICE)<<"Doing GraphicsContext::makeCurrent"<<(unsigned int)OpenThreads::Thread::CurrentThread()<<std::endl;
ReleaseContext_Block_MakeCurrentOperation* rcbmco = 0;
if (_graphicsThread.valid() &&
_threadOfLastMakeCurrent == _graphicsThread.get())
_threadOfLastMakeCurrent == _graphicsThread.get() &&
_threadOfLastMakeCurrent != OpenThreads::Thread::CurrentThread())
{
// create a relase contex, block and make current operation to stop the graphics thread while we use the graphics context for ourselves
rcbmco = new ReleaseContext_Block_MakeCurrentOperation;
@@ -140,6 +177,8 @@ void GraphicsContext::makeCurrent()
if (!isCurrent()) _mutex.lock();
osg::notify(osg::NOTICE)<<"Calling GraphicsContext::makeCurrentImplementation"<<(unsigned int)OpenThreads::Thread::CurrentThread()<<std::endl;
makeCurrentImplementation();
_threadOfLastMakeCurrent = OpenThreads::Thread::CurrentThread();
@@ -150,6 +189,8 @@ void GraphicsContext::makeCurrent()
// contex itself with a makeCurrent(), this will then block on the GraphicsContext mutex till releaseContext() releases it.
rcbmco->release();
}
osg::notify(osg::NOTICE)<<"Done GraphicsContext::makeCurrentImplementation"<<(unsigned int)OpenThreads::Thread::CurrentThread()<<std::endl;
}
void GraphicsContext::makeContextCurrent(GraphicsContext* readContext)
@@ -165,3 +206,59 @@ void GraphicsContext::releaseContext()
{
_mutex.unlock();
}
void GraphicsContext::swapBuffers()
{
if (isCurrent())
{
osg::notify(osg::NOTICE)<<"Doing GraphicsContext::swapBuffers() call to swapBuffersImplementation() "<<(unsigned int)OpenThreads::Thread::CurrentThread()<<std::endl;
swapBuffersImplementation();
}
else if (_graphicsThread.valid() &&
_threadOfLastMakeCurrent == _graphicsThread.get())
{
osg::notify(osg::NOTICE)<<"Doing GraphicsContext::swapBuffers() registering SwapBuffersOperation"<<(unsigned int)OpenThreads::Thread::CurrentThread()<<std::endl;
_graphicsThread->add(new SwapBuffersOperation);
}
else
{
osg::notify(osg::NOTICE)<<"Doing GraphicsContext::swapBuffers() makeCurrent;swapBuffersImplementation;releaseContext"<<(unsigned int)OpenThreads::Thread::CurrentThread()<<std::endl;
makeCurrent();
swapBuffersImplementation();
releaseContext();
}
}
void GraphicsContext::createGraphicsThread()
{
if (!_graphicsThread)
{
setGraphicsThread(new GraphicsThread);
}
}
void GraphicsContext::setGraphicsThread(GraphicsThread* gt)
{
if (_graphicsThread==gt) return;
if (_graphicsThread.valid())
{
// need to kill the thread in some way...
_graphicsThread->cancel();
_graphicsThread->_graphicsContext = 0;
}
_graphicsThread = gt;
if (_graphicsThread.valid())
{
_graphicsThread->_graphicsContext = this;
if (!_graphicsThread->isRunning() && isRealized())
{
_graphicsThread->startThread();
}
}
}