source: code/branches/usability/src/libraries/tools/bsp/OgreGpuCommandBufferFlush.h @ 9215

#ifndef __GPUCOMMANDBUFFERFLUSH_H__
#define __GPUCOMMANDBUFFERFLUSH_H__

#include "OgrePrerequisites.h"
#include "OgreFrameListener.h"

namespace Ogre
{
        
        /** Helper class which can assist you in making sure the GPU command
                buffer is regularly flushed, so in cases where the CPU is outpacing the
                GPU we do not hit a situation where the CPU suddenly has to stall to 
                wait for more space in the buffer.
        */
        class GpuCommandBufferFlush : public FrameListener
        {
        protected:
                bool mUseOcclusionQuery;
                typedef std::vector<HardwareOcclusionQuery*> HOQList;
                HOQList mHOQList;
                size_t mMaxQueuedFrames;
                size_t mCurrentFrame;
                bool mStartPull;
                bool mStarted;

        public:
                GpuCommandBufferFlush();
                virtual ~GpuCommandBufferFlush();

                void start(size_t maxQueuedFrames = 2);
                void stop();
                bool frameStarted(const FrameEvent& evt);
                bool frameEnded(const FrameEvent& evt);

        };


}


#endif