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cpuGLVertexBuffer.h
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2 // Copyright 2013 Pixar
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24 
25 #ifndef OPENSUBDIV3_OSD_CPU_GL_VERTEX_BUFFER_H
26 #define OPENSUBDIV3_OSD_CPU_GL_VERTEX_BUFFER_H
27 
28 #include "../version.h"
29 
30 #include <cstddef>
31 #include "../osd/opengl.h"
32 
33 namespace OpenSubdiv {
34 namespace OPENSUBDIV_VERSION {
35 
36 namespace Osd {
37 
48 public:
50  static CpuGLVertexBuffer * Create(int numElements, int numVertices,
51  void *deviceContext = NULL);
52 
55 
58  void UpdateData(const float *src, int startVertex, int numVertices,
59  void *deviceContext = NULL);
60 
62  int GetNumElements() const;
63 
65  int GetNumVertices() const;
66 
69  float * BindCpuBuffer();
70 
73  GLuint BindVBO(void *deviceContext = NULL);
74 
75 protected:
77  CpuGLVertexBuffer(int numElements, int numVertices);
78 
80  bool allocate();
81 
82 private:
83  int _numElements;
84  int _numVertices;
85  GLuint _vbo;
86  float *_cpuBuffer;
87  bool _dataDirty;
88 };
89 
90 } // end namespace Osd
91 
92 } // end namespace OPENSUBDIV_VERSION
93 using namespace OPENSUBDIV_VERSION;
94 
95 } // end namespace OpenSubdiv
96 
97 #endif // OPENSUBDIV3_OSD_CPU_GL_VERTEX_BUFFER_H
int GetNumVertices() const
Returns how many vertices allocated in this vertex buffer.
static CpuGLVertexBuffer * Create(int numElements, int numVertices, void *deviceContext=NULL)
Creator. Returns NULL if error.
void UpdateData(const float *src, int startVertex, int numVertices, void *deviceContext=NULL)
bool allocate()
Allocates VBO for this buffer. Returns true if success.
Concrete vertex buffer class for cpu subdivision and OpenGL drawing.
int GetNumElements() const
Returns how many elements defined in this vertex buffer.
CpuGLVertexBuffer(int numElements, int numVertices)
Constructor.