source: GTP/trunk/Lib/Vis/OnlineCullingCHC/OGRE/src/OgrePlatformOcclusionQuery.cpp @ 944

#include "OgrePlatformOcclusionQuery.h"
#include <OgreLogManager.h>

namespace Ogre {

//-----------------------------------------------------------------------
PlatformOcclusionQuery::PlatformOcclusionQuery(RenderSystem *rsys)
{
        mHardwareOcclusionQuery = rsys->createHardwareOcclusionQuery();
}
//-----------------------------------------------------------------------
PlatformOcclusionQuery::~PlatformOcclusionQuery()
{
        // hardwareocclusion query is deleted by Ogre
        //delete mHardwareOcclusionQuery;
}
//-----------------------------------------------------------------------
void PlatformOcclusionQuery::BeginQuery()
{
        mHardwareOcclusionQuery->beginOcclusionQuery();
}
//-----------------------------------------------------------------------
void PlatformOcclusionQuery::EndQuery()
{
        mHardwareOcclusionQuery->endOcclusionQuery();
}
//-----------------------------------------------------------------------
bool PlatformOcclusionQuery::GetQueryResult(unsigned int &visiblePixels, 
                                                                                        const bool waitForResult) const
{
        // return mHardwareOcclusionQuery->pullOcclusionQuery(&visiblePixels, waitForResult);

        bool isAvailable = true;

        if (!waitForResult)
        {
                isAvailable = !mHardwareOcclusionQuery->isStillOutstanding();
        }

//std::stringstream d; d << mHardwareOcclusionQuery << ", available: " << isAvailable << ", waitforresult: " << waitForResult;
//              Ogre::LogManager::getSingleton().logMessage(d.str());

        if (isAvailable)
                return mHardwareOcclusionQuery->pullOcclusionQuery(&visiblePixels);
        
        return false;
}

} // namespace Ogre