OpenSubdiv/opensubdiv/osd/cudaVertexBuffer.h

//
//   Copyright 2013 Pixar
//
//   Licensed under the Apache License, Version 2.0 (the "Apache License")
//   with the following modification; you may not use this file except in
//   compliance with the Apache License and the following modification to it:
//   Section 6. Trademarks. is deleted and replaced with:
//
//   6. Trademarks. This License does not grant permission to use the trade
//      names, trademarks, service marks, or product names of the Licensor
//      and its affiliates, except as required to comply with Section 4(c) of
//      the License and to reproduce the content of the NOTICE file.
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//   You may obtain a copy of the Apache License at
//
//       http://www.apache.org/licenses/LICENSE-2.0
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//   Unless required by applicable law or agreed to in writing, software
//   distributed under the Apache License with the above modification is
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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