IndexBuffer.cpp

#include "IndexBuffer.h"

#include "Renderer.h"

IndexBuffer::IndexBuffer(const unsigned int* data, unsigned int count)
	: m_count(count)
{
#ifdef DEBUG
	ASSERT(sizeof(unsigned int) == sizeof(GLuint));
#endif

	glGenBuffers(1, &m_renderer_id);
    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_renderer_id);
    //                                                   <- should be a four byte type <- GLuint
    glBufferData(GL_ELEMENT_ARRAY_BUFFER, count * sizeof(unsigned int), data, GL_STATIC_DRAW);
}

IndexBuffer::~IndexBuffer()
{
    glDeleteBuffers(1, &m_renderer_id);
}

void IndexBuffer::bind() const
{
    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_renderer_id);
}

void IndexBuffer::unbind() const
{
    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
}

unsigned int IndexBuffer::get_count() const
{
    return m_count;
}