text: //-----------------------------------------------------------------------------
  // Copyright (c) 2012 GarageGames, LLC
  //
  // Permission is hereby granted, free of charge, to any person obtaining a copy
  // of this software and associated documentation files (the "Software"), to
  // deal in the Software without restriction, including without limitation the
  // rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
  // sell copies of the Software, and to permit persons to whom the Software is
  // furnished to do so, subject to the following conditions:
  //
  // The above copyright notice and this permission notice shall be included in
  // all copies or substantial portions of the Software.
  //
  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  // IN THE SOFTWARE.
  //-----------------------------------------------------------------------------
  
  #ifndef _GFX_D3D9_OCCLUSIONQUERY_H_
  #define _GFX_D3D9_OCCLUSIONQUERY_H_
  
  #ifndef _GFXOCCLUSIONQUERY_H_
  #include "gfx/gfxOcclusionQuery.h"
  #endif
  
  #ifdef TORQUE_GATHER_METRICS
     #ifndef _PLATFORM_PLATFORMTIMER_H_
     #include "platform/platformTimer.h"
     #endif
  #endif
  
  struct IDirect3DQuery9;
  
  
  class GFXD3D9OcclusionQuery : public GFXOcclusionQuery
  {
  private:
     mutable IDirect3DQuery9 *mQuery;
  
  #ifdef TORQUE_GATHER_METRICS
     U32 mBeginFrame;
     U32 mTimeSinceEnd;
     PlatformTimer *mTimer;
  #endif
  
  public:
     GFXD3D9OcclusionQuery( GFXDevice *device );
     virtual ~GFXD3D9OcclusionQuery();
  
     virtual bool begin();
     virtual void end();   
     virtual OcclusionQueryStatus getStatus( bool block, U32 *data = NULL );
  
     // GFXResource
     virtual void zombify();   
     virtual void resurrect();
     virtual const String describeSelf() const;
  };
  
  #endif // _GFX_D3D9_OCCLUSIONQUERY_H_