OpenSubdiv/opensubdiv/osd/cudaVertexBuffer.h

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#ifndef OSD_CUDA_VERTEX_BUFFER_H
#define OSD_CUDA_VERTEX_BUFFER_H

#include "../version.h"

namespace OpenSubdiv {
namespace OPENSUBDIV_VERSION {

/// \brief Concrete vertex buffer class for Cuda subvision.
///
/// OsdCudaVertexBuffer implements OsdCudaVertexBufferInterface.
/// An instance of this buffer class can be passed to OsdCudaComputeController
///
class OsdCudaVertexBuffer {

public:
    /// Creator. Returns NULL if error.
    static OsdCudaVertexBuffer * Create(int numElements, int numVertices);

    /// Destructor.
    ~OsdCudaVertexBuffer();

    /// This method is meant to be used in client code in order to provide coarse
    /// vertices data to Osd.
    void UpdateData(const float *src, int startVertex, int numVertices);

    /// Returns how many elements defined in this vertex buffer.
    int GetNumElements() const;

    /// Returns how many vertices allocated in this vertex buffer.
    int GetNumVertices() const;

    /// Returns cuda memory.
    float * BindCudaBuffer();

protected:
    /// Constructor.
    OsdCudaVertexBuffer(int numElements, int numVertices);

    /// Allocates Cuda memory for this buffer.
    /// Returns true if success.
    bool allocate();

private:
    int _numElements;
    int _numVertices;
    void *_cudaMem;

};

}  // end namespace OPENSUBDIV_VERSION
using namespace OPENSUBDIV_VERSION;

}  // end namespace OpenSubdiv

#endif  // OSD_CUDA_VERTEX_BUFFER_H