GR_OSDSubdData.h

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/*
 * PROPRIETARY INFORMATION.  This software is proprietary to
 * Side Effects Software Inc., and is not to be reproduced,
 * transmitted, or disclosed in any way without written permission.
 * 
 * NAME:        GR_OSDSubdData.C ( GR Library, C++)
 *
 * COMMENTS:
 *      Class for subdivision surface data shared between GL and Vulkan.
 */
#ifndef GR_OSDSubdData_h
#define GR_OSDSubdData_h

#include <UT/UT_UniquePtr.h>
#include <GT/GT_UtilOpenSubdiv.h>
#include <GT/GT_Primitive.h>
#include "GR_API.h"

class GR_UpdateParms;

class GR_API GR_OSDSubdData
{
public:
    void        preUpdate(const GT_PrimitiveHandle &primh,
                          GR_UpdateParms &p);
    
    bool        isReducedLOD() const { return myReducedLOD; }
    int         getSubdivisionLevel() const { return mySubdLevel; }
    const GT_PrimitiveHandle &surface() { return mySurface; }

    void        resetSubdivision();

private:
    UT_UniquePtr<GT_UtilOpenSubdiv> myOsd;
    GT_PrimitiveHandle              mySurface;
    int64       myVertexAttributeDataIdHash = -1;
    bool        myReducedLOD = false;
    int         mySubdLevel = 0;
    int         myTopID = 0;
};

#endif