OgreGLES2HardwareOcclusionQuery.h

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#ifndef __GLES2HARDWAREOCCLUSIONQUERY_H__
#define __GLES2HARDWAREOCCLUSIONQUERY_H__

#include "OgreGLES2Prerequisites.h"
#include "OgreHardwareOcclusionQuery.h"


namespace Ogre { 


// If you use multiple rendering passes you can test only the first pass and all other passes don't have to be rendered 
// if the first pass result has too few pixels visible.

// Be sure to render all occluder first and whats out so the RenderQue don't switch places on 
// the occluding objects and the tested objects because it thinks it's more effective..

class _OgreGLES2Export GLES2HardwareOcclusionQuery : public HardwareOcclusionQuery
{
//----------------------------------------------------------------------
// Public methods
//--
public:
    GLES2HardwareOcclusionQuery();
    ~GLES2HardwareOcclusionQuery();

    //------------------------------------------------------------------
    // Occlusion query functions (see base class documentation for this)
    //--
    void beginOcclusionQuery();
    void endOcclusionQuery();
    bool pullOcclusionQuery( unsigned int* NumOfFragments); 
    bool isStillOutstanding(void);


    //----------------------------------------------------------------------
    // private members
    //--
    private:

        GLuint          mQueryID;
};

}

#endif