cpuD3D11VertexBuffer.h

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//
//   Copyright 2013 Pixar
//
//   Licensed under the terms set forth in the LICENSE.txt file available at
//   https://opensubdiv.org/license.
//
 
#ifndef OPENSUBDIV3_OSD_CPU_D3D11_VERTEX_BUFFER_H
#define OPENSUBDIV3_OSD_CPU_D3D11_VERTEX_BUFFER_H
 
#include "../version.h"
#include <cstddef>
 
struct ID3D11Buffer;
struct ID3D11Device;
struct ID3D11DeviceContext;
 
namespace OpenSubdiv {
namespace OPENSUBDIV_VERSION {
 
namespace Osd {

class CpuD3D11VertexBuffer {
public:
    static CpuD3D11VertexBuffer * Create(int numElements, int numVertices,
                                         ID3D11DeviceContext *deviceContext);

    virtual ~CpuD3D11VertexBuffer();

    void UpdateData(const float *src, int startVertex, int numVertices,
                    void *deviceContext = NULL);

    int GetNumElements() const;

    int GetNumVertices() const;

    float * BindCpuBuffer();

    ID3D11Buffer *BindD3D11Buffer(ID3D11DeviceContext *deviceContext);

    ID3D11Buffer *BindVBO(ID3D11DeviceContext *deviceContext) {
        return BindD3D11Buffer(deviceContext);
    }
 
protected:
    CpuD3D11VertexBuffer(int numElements, int numVertices);
 
    bool allocate(ID3D11Device *device);
 
private:
    int _numElements;
    int _numVertices;
    ID3D11Buffer *_d3d11Buffer;
    float *_cpuBuffer;
};
 
}  // end namespace Osd
 
}  // end namespace OPENSUBDIV_VERSION
using namespace OPENSUBDIV_VERSION;
 
}  // end namespace OpenSubdiv
 
#endif  // OPENSUBDIV3_OSD_CPU_D3D11_VERTEX_BUFFER_H