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cpuGLVertexBuffer.h
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1 //
2 // Copyright 2013 Pixar
3 //
4 // Licensed under the Apache License, Version 2.0 (the "Apache License")
5 // with the following modification; you may not use this file except in
6 // compliance with the Apache License and the following modification to it:
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24 
25 #ifndef OSD_CPU_GL_VERTEX_BUFFER_H
26 #define OSD_CPU_GL_VERTEX_BUFFER_H
27 
28 #include "../version.h"
29 
30 #include "../osd/opengl.h"
31 
32 namespace OpenSubdiv {
33 namespace OPENSUBDIV_VERSION {
34 
35 namespace Osd {
36 
47 public:
49  static CpuGLVertexBuffer * Create(int numElements, int numVertices);
50 
53 
56  void UpdateData(const float *src, int startVertex, int numVertices);
57 
59  int GetNumElements() const;
60 
62  int GetNumVertices() const;
63 
66  float * BindCpuBuffer();
67 
70  GLuint BindVBO();
71 
72 protected:
74  CpuGLVertexBuffer(int numElements, int numVertices);
75 
77  bool allocate();
78 
79 private:
80  int _numElements;
81  int _numVertices;
82  GLuint _vbo;
83  float *_cpuBuffer;
84  bool _dataDirty;
85 };
86 
87 } // end namespace Osd
88 
89 } // end namespace OPENSUBDIV_VERSION
90 using namespace OPENSUBDIV_VERSION;
91 
92 } // end namespace OpenSubdiv
93 
94 #endif // OSD_CPU_GL_VERTEX_BUFFER_H
95 
void UpdateData(const float *src, int startVertex, int numVertices)
int GetNumElements() const
Returns how many elements defined in this vertex buffer.
bool allocate()
Allocates VBO for this buffer. Returns true if success.
CpuGLVertexBuffer(int numElements, int numVertices)
Constructor.
Concrete vertex buffer class for cpu subvision and OpenGL drawing.
static CpuGLVertexBuffer * Create(int numElements, int numVertices)
Creator. Returns NULL if error.
int GetNumVertices() const
Returns how many vertices allocated in this vertex buffer.