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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:
7// Section 6. Trademarks. is deleted and replaced with:
8//
9// 6. Trademarks. This License does not grant permission to use the trade
10// names, trademarks, service marks, or product names of the Licensor
11// and its affiliates, except as required to comply with Section 4(c) of
12// the License and to reproduce the content of the NOTICE file.
13//
14// You may obtain a copy of the Apache License at
15//
16// http://www.apache.org/licenses/LICENSE-2.0
17//
18// Unless required by applicable law or agreed to in writing, software
19// distributed under the Apache License with the above modification is
20// distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
21// KIND, either express or implied. See the Apache License for the specific
22// language governing permissions and limitations under the Apache License.
23//
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
33namespace OpenSubdiv {
34namespace OPENSUBDIV_VERSION {
35
36namespace Osd {
37
48public:
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
75protected:
77 CpuGLVertexBuffer(int numElements, int numVertices);
78
80 bool allocate();
81
82private:
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
93using namespace OPENSUBDIV_VERSION;
94
95} // end namespace OpenSubdiv
96
97#endif // OPENSUBDIV3_OSD_CPU_GL_VERTEX_BUFFER_H
Concrete vertex buffer class for cpu subdivision and OpenGL drawing.
CpuGLVertexBuffer(int numElements, int numVertices)
Constructor.
int GetNumElements() const
Returns how many elements defined in this vertex buffer.
void UpdateData(const float *src, int startVertex, int numVertices, void *deviceContext=NULL)
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.
bool allocate()
Allocates VBO for this buffer. Returns true if success.