unsigned int GraphicsContext::createNewContextID()
{
OpenThreads::ScopedLock<OpenThreads::Mutex> lock(s_contextIDMapMutex);
// first check to see if we can reuse contextID;
for(ContextIDMap::iterator itr = s_contextIDMap.begin();
itr != s_contextIDMap.end();
++itr)
{
if (itr->second._numContexts == 0)
{
// reuse contextID;
itr->second._numContexts = 1;
OSG_INFO<<"GraphicsContext::createNewContextID() reusing contextID="<<itr->first<<std::endl;
return itr->first;
}
}
unsigned int contextID = s_contextIDMap.size();
s_contextIDMap[contextID]._numContexts = 1;
OSG_INFO<<"GraphicsContext::createNewContextID() creating contextID="<<contextID<<std::endl;
OSG_INFO<<"Updating the MaxNumberOfGraphicsContexts to "<<contextID+1<<std::endl;
// update the the maximum number of graphics contexts,
// to ensure that texture objects and display buffers are configured to the correct size.
osg::DisplaySettings::instance()->setMaxNumberOfGraphicsContexts( contextID + 1 );
return contextID;
}
GraphicsContext* GraphicsContext::getCompileContext(unsigned int contextID)
{
// OSG_NOTICE<<"GraphicsContext::getCompileContext "<<contextID<<std::endl;
OpenThreads::ScopedLock<OpenThreads::Mutex> lock(s_contextIDMapMutex);
ContextIDMap::iterator itr = s_contextIDMap.find(contextID);
if (itr != s_contextIDMap.end()) return itr->second._compileContext.get();
else return 0;
}
unsigned int GraphicsContext::getMaxContextID()
{
OpenThreads::ScopedLock<OpenThreads::Mutex> lock(s_contextIDMapMutex);
unsigned int maxContextID = 0;
for(ContextIDMap::iterator itr = s_contextIDMap.begin();
itr != s_contextIDMap.end();
++itr)
{
if (itr->first > maxContextID) maxContextID = itr->first;
}
return maxContextID;
}
ContextData* osg::getContextData(unsigned int contextID)
{
OpenThreads::ScopedLock<OpenThreads::Mutex> lock(s_contextIDMapMutex);
ContextIDMap::iterator itr = s_contextIDMap.find(contextID);
return (itr!=s_contextIDMap.end()) ? itr->second.get() : 0;
}
