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// Geometric Tools, LLC
// Copyright (c) 1998-2014
// Distributed under the Boost Software License, Version 1.0.
// http://www.boost.org/LICENSE_1_0.txt
// http://www.geometrictools.com/License/Boost/LICENSE_1_0.txt
//
// File Version: 5.0.0 (2010/01/01)
#include "Wm5GraphicsPCH.h"
#include "Wm5OpenGLIndexBuffer.h"
#include "Wm5OpenGLMapping.h"
using namespace Wm5;
//----------------------------------------------------------------------------
PdrIndexBuffer::PdrIndexBuffer (Renderer*, const IndexBuffer* ibuffer)
{
glGenBuffers(1, &mBuffer);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, mBuffer);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, ibuffer->GetNumBytes(), 0,
gOGLBufferUsage[ibuffer->GetUsage()]);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
void* data = Lock(Buffer::BL_WRITE_ONLY);
memcpy(data, ibuffer->GetData(), ibuffer->GetNumBytes());
Unlock();
}
//----------------------------------------------------------------------------
PdrIndexBuffer::~PdrIndexBuffer ()
{
glDeleteBuffers(1, &mBuffer);
}
//----------------------------------------------------------------------------
void PdrIndexBuffer::Enable (Renderer*)
{
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, mBuffer);
}
//----------------------------------------------------------------------------
void PdrIndexBuffer::Disable (Renderer*)
{
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
}
//----------------------------------------------------------------------------
void* PdrIndexBuffer::Lock (Buffer::Locking mode)
{
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, mBuffer);
GLvoid* videoMemory = glMapBuffer(GL_ELEMENT_ARRAY_BUFFER,
gOGLBufferLocking[mode]);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
return videoMemory;
}
//----------------------------------------------------------------------------
void PdrIndexBuffer::Unlock ()
{
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, mBuffer);
glUnmapBuffer(GL_ELEMENT_ARRAY_BUFFER);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
}
//----------------------------------------------------------------------------
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