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#ifndef OSD_CUDA_DISPATCHER_H
#define OSD_CUDA_DISPATCHER_H

#include "../version.h"
#include "../osd/kernelDispatcher.h"
#include "../osd/vertexBuffer.h"

#include <GL/glew.h>

#include <utility>
#include <vector>

struct cudaGraphicsResource;

namespace OpenSubdiv {
namespace OPENSUBDIV_VERSION {

struct DeviceVertex;

class OsdCudaVertexBuffer : public OsdGpuVertexBuffer {
public:
    OsdCudaVertexBuffer(int numElements, int numVertices);
    virtual ~OsdCudaVertexBuffer();

    virtual void UpdateData(const float *src, int numVertices);
    void * Map();
    void Unmap();

protected:
    cudaGraphicsResource *_cudaResource;
};

class OsdCudaKernelDispatcher : public OsdKernelDispatcher
{
public:
    OsdCudaKernelDispatcher(int levels);
    virtual ~OsdCudaKernelDispatcher();


    virtual void ApplyBilinearFaceVerticesKernel(FarMesh<OsdVertex> * mesh, int offset, int level, int start, int end, void * data) const;
    
    virtual void ApplyBilinearEdgeVerticesKernel(FarMesh<OsdVertex> * mesh, int offset, int level, int start, int end, void * data) const;
    
    virtual void ApplyBilinearVertexVerticesKernel(FarMesh<OsdVertex> * mesh, int offset, int level, int start, int end, void * data) const;



    virtual void ApplyCatmarkFaceVerticesKernel(FarMesh<OsdVertex> * mesh, int offset, int level, int start, int end, void * data) const;
    
    virtual void ApplyCatmarkEdgeVerticesKernel(FarMesh<OsdVertex> * mesh, int offset, int level, int start, int end, void * data) const;
    
    virtual void ApplyCatmarkVertexVerticesKernelB(FarMesh<OsdVertex> * mesh, int offset, int level, int start, int end, void * data) const;
    
    virtual void ApplyCatmarkVertexVerticesKernelA(FarMesh<OsdVertex> * mesh, int offset, bool pass, int level, int start, int end, void * data) const;



    virtual void ApplyLoopEdgeVerticesKernel(FarMesh<OsdVertex> * mesh, int offset, int level, int start, int end, void * data) const;
    
    virtual void ApplyLoopVertexVerticesKernelB(FarMesh<OsdVertex> * mesh, int offset, int level, int start, int end, void * data) const;
    
    virtual void ApplyLoopVertexVerticesKernelA(FarMesh<OsdVertex> * mesh, int offset, bool pass, int level, int start, int end, void * data) const;


    virtual void CopyTable(int tableIndex, size_t size, const void *ptr);

    virtual void OnKernelLaunch() {}

    virtual void OnKernelFinish() {}

    virtual OsdVertexBuffer *InitializeVertexBuffer(int numElements, int numVertices);

    virtual void BindVertexBuffer(OsdVertexBuffer *vertex, OsdVertexBuffer *varying);
    
    virtual void UnbindVertexBuffer();

    virtual void Synchronize();

    static OsdKernelDispatcher * Create(int levels) {
        return new OsdCudaKernelDispatcher(levels);
    }
    static void Register() {
        Factory::GetInstance().Register(Create, kCUDA);
    }

protected:
    struct DeviceTable 
    {
        DeviceTable() : devicePtr(NULL) {}
       ~DeviceTable();

        void Copy(int size, const void *ptr);

        void *devicePtr;
    };

    std::vector<DeviceTable> _tables;

    OsdCudaVertexBuffer *_currentVertexBuffer,
                        *_currentVaryingBuffer;

    float *_deviceVertices,
          *_deviceVaryings;

    int _numVertexElements, 
        _numVaryingElements;
};

} // end namespace OPENSUBDIV_VERSION
using namespace OPENSUBDIV_VERSION;

} // end namespace OpenSubdiv

#endif // OSD_CUDA_DISPATCHER_H