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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
33 namespace OpenSubdiv {
34 namespace OPENSUBDIV_VERSION {
35
36 namespace Osd {
37
47 class CpuGLVertexBuffer {
48 public:
50 static CpuGLVertexBuffer * Create(int numElements, int numVertices,
51 void *deviceContext = NULL);
52
54 ~CpuGLVertexBuffer();
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
OpenSubdiv
Definition limits.h:32
OpenSubdiv::OPENSUBDIV_VERSION::Osd::CpuGLVertexBuffer
Concrete vertex buffer class for cpu subdivision and OpenGL drawing.
Definition cpuGLVertexBuffer.h:47
OpenSubdiv::OPENSUBDIV_VERSION::Osd::CpuGLVertexBuffer::CpuGLVertexBuffer
CpuGLVertexBuffer(int numElements, int numVertices)
Constructor.
OpenSubdiv::OPENSUBDIV_VERSION::Osd::CpuGLVertexBuffer::BindVBO
GLuint BindVBO(void *deviceContext=NULL)
OpenSubdiv::OPENSUBDIV_VERSION::Osd::CpuGLVertexBuffer::GetNumElements
int GetNumElements() const
Returns how many elements defined in this vertex buffer.
OpenSubdiv::OPENSUBDIV_VERSION::Osd::CpuGLVertexBuffer::UpdateData
void UpdateData(const float *src, int startVertex, int numVertices, void *deviceContext=NULL)
OpenSubdiv::OPENSUBDIV_VERSION::Osd::CpuGLVertexBuffer::GetNumVertices
int GetNumVertices() const
Returns how many vertices allocated in this vertex buffer.
OpenSubdiv::OPENSUBDIV_VERSION::Osd::CpuGLVertexBuffer::Create
static CpuGLVertexBuffer * Create(int numElements, int numVertices, void *deviceContext=NULL)
Creator. Returns NULL if error.
OpenSubdiv::OPENSUBDIV_VERSION::Osd::CpuGLVertexBuffer::allocate
bool allocate()
Allocates VBO for this buffer. Returns true if success.
OpenSubdiv::OPENSUBDIV_VERSION::Osd::CpuGLVertexBuffer::BindCpuBuffer
float * BindCpuBuffer()
OpenSubdiv::OPENSUBDIV_VERSION::Osd::CpuGLVertexBuffer::~CpuGLVertexBuffer
~CpuGLVertexBuffer()
Destructor.