vbo.cpp 3.68 KB
Newer Older
Pierre Kraemer's avatar
Pierre Kraemer committed
1 2 3
/*******************************************************************************
* CGoGN: Combinatorial and Geometric modeling with Generic N-dimensional Maps  *
* version 0.1                                                                  *
4
* Copyright (C) 2009-2012, IGG Team, LSIIT, University of Strasbourg           *
Pierre Kraemer's avatar
Pierre Kraemer committed
5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
*                                                                              *
* This library is free software; you can redistribute it and/or modify it      *
* under the terms of the GNU Lesser General Public License as published by the *
* Free Software Foundation; either version 2.1 of the License, or (at your     *
* option) any later version.                                                   *
*                                                                              *
* This library is distributed in the hope that it will be useful, but WITHOUT  *
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or        *
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License  *
* for more details.                                                            *
*                                                                              *
* You should have received a copy of the GNU Lesser General Public License     *
* along with this library; if not, write to the Free Software Foundation,      *
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA.           *
*                                                                              *
20
* Web site: http://cgogn.unistra.fr/                                           *
Pierre Kraemer's avatar
Pierre Kraemer committed
21 22 23 24
* Contact information: cgogn@unistra.fr                                        *
*                                                                              *
*******************************************************************************/

Sylvain Thery's avatar
Sylvain Thery committed
25 26
#include "Utils/vbo.h"
#include "Utils/GLSLShader.h"
27 28
#include <stdio.h>
#include <string.h>
Sylvain Thery's avatar
Sylvain Thery committed
29

Pierre Kraemer's avatar
Pierre Kraemer committed
30 31
namespace CGoGN
{
Pierre Kraemer's avatar
merge..  
Pierre Kraemer committed
32

Sylvain Thery's avatar
Sylvain Thery committed
33
namespace Utils
Pierre Kraemer's avatar
Pierre Kraemer committed
34 35
{

Pierre Kraemer's avatar
merge..  
Pierre Kraemer committed
36
VBO::VBO() : m_nbElts(0), m_lock(false)
Pierre Kraemer's avatar
Pierre Kraemer committed
37
{
Pierre Kraemer's avatar
merge..  
Pierre Kraemer committed
38
	glGenBuffers(1, &m_id);
Sylvain Thery's avatar
Sylvain Thery committed
39 40
	m_refs.reserve(4);
}
Pierre Kraemer's avatar
Pierre Kraemer committed
41

Pierre Kraemer's avatar
merge..  
Pierre Kraemer committed
42 43 44 45
VBO::VBO(const VBO& vbo) :
	m_data_size(vbo.m_data_size),
	m_nbElts(vbo.m_nbElts),
	m_lock(false)
46
{
Pierre Kraemer's avatar
merge..  
Pierre Kraemer committed
47
	unsigned int nbbytes =  sizeof(float) * m_data_size * m_nbElts;
48

Pierre Kraemer's avatar
merge..  
Pierre Kraemer committed
49
	glGenBuffers(1, &m_id);
50 51 52 53 54 55 56 57 58 59 60

	vbo.bind();
	void* src = glMapBuffer(GL_ARRAY_BUFFER, GL_READ_WRITE);

	bind();
	glBufferData(GL_ARRAY_BUFFER, nbbytes, src, GL_STREAM_DRAW);

	vbo.bind();
	glUnmapBuffer(GL_ARRAY_BUFFER);
}

Sylvain Thery's avatar
Sylvain Thery committed
61
VBO::~VBO()
Pierre Kraemer's avatar
Pierre Kraemer committed
62
{
63 64
	if (m_lock)
		releasePtr();
Pierre Kraemer's avatar
merge..  
Pierre Kraemer committed
65
	glDeleteBuffers(1, &m_id);
Pierre Kraemer's avatar
Pierre Kraemer committed
66 67
}

68 69 70 71 72 73 74 75 76
void VBO::sameAllocSameBufferSize(const VBO& vbo)
{
	m_data_size = vbo.m_data_size;
	m_nbElts = vbo.m_nbElts;
	unsigned int nbbytes =  sizeof(float) * m_data_size * m_nbElts;
	bind();
	glBufferData(GL_ARRAY_BUFFER, nbbytes, NULL, GL_STREAM_DRAW);
}

77 78 79 80
void* VBO::lockPtr()
{
	if (m_lock)
	{
81
		CGoGNerr << "Error already locked VBO" << CGoGNendl;
82 83 84
		return NULL;
	}

Pierre Kraemer's avatar
merge..  
Pierre Kraemer committed
85
	m_lock = true;
86 87 88 89
	glBindBuffer(GL_ARRAY_BUFFER, m_id);
	return glMapBuffer(GL_ARRAY_BUFFER, GL_READ_WRITE);
}

90 91 92 93
const void* VBO::lockPtr() const
{
	if (m_lock)
	{
94
		CGoGNerr << "Error already locked VBO" << CGoGNendl;
95 96 97 98 99 100 101 102 103
		return NULL;
	}

	m_lock = true;
	glBindBuffer(GL_ARRAY_BUFFER, m_id);
	return glMapBuffer(GL_ARRAY_BUFFER, GL_READ_ONLY);
}

void VBO::releasePtr() const
104 105 106
{
	glBindBuffer(GL_ARRAY_BUFFER, m_id);
	glUnmapBuffer(GL_ARRAY_BUFFER);
Pierre Kraemer's avatar
merge..  
Pierre Kraemer committed
107
	m_lock = false;
108 109
}

110 111 112
void VBO::copyData(void *ptr) const
{
	glBindBuffer(GL_ARRAY_BUFFER, m_id);
113
	glGetBufferSubData(GL_ARRAY_BUFFER, 0, m_nbElts * m_data_size * sizeof(float), ptr);
114 115 116 117 118 119
}

void VBO::allocate(unsigned int nbElts)
{
	m_nbElts = nbElts;
	glBindBuffer(GL_ARRAY_BUFFER, m_id);
120
	glBufferData(GL_ARRAY_BUFFER, nbElts * m_data_size * sizeof(float), 0, GL_STREAM_DRAW);
121 122
}

Pierre Kraemer's avatar
merge..  
Pierre Kraemer committed
123
} // namespace Utils
124

Pierre Kraemer's avatar
merge..  
Pierre Kraemer committed
125
} // namespace CGoGN