OpenSubdiv/opensubdiv/osd/clVertexBuffer.h

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#ifndef OSD_CL_VERTEX_BUFFER_H
#define OSD_CL_VERTEX_BUFFER_H

#include "../version.h"

#if defined(__APPLE__)
    #include <OpenCL/opencl.h>
#else
    #include <CL/opencl.h>
#endif

namespace OpenSubdiv {
namespace OPENSUBDIV_VERSION {

/// \brief Concrete vertex buffer class for OpenCL subvision.
/// OsdCLVertexBuffer implements OsdCLVertexBufferInterface. An instance
///  of this buffer class can be passed to OsdCLComputeController
class OsdCLVertexBuffer {

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

    /// Destructor.
    ~OsdCLVertexBuffer();

    /// 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 numVertices, cl_command_queue clQueue);

    /// 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 the CL memory object.
    cl_mem BindCLBuffer(cl_command_queue queue);

protected:
    /// Constructor.
    OsdCLVertexBuffer(int numElements, int numVertices, cl_context clContext);

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

private:
    int _numElements;
    int _numVertices;
    cl_command_queue _clQueue;
    cl_mem _clMemory;
};

}  // end namespace OPENSUBDIV_VERSION
using namespace OPENSUBDIV_VERSION;

}  // end namespace OpenSubdiv

#endif  // OSD_CL_VERTEX_BUFFER_H