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//
// libavg - Media Playback Engine.
// Copyright (C) 2003-2014 Ulrich von Zadow
//
// 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 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//
// Current versions can be found at www.libavg.de
//
#include "GLBufferCache.h"
#include "GLContext.h"
#include "../base/Exception.h"
using namespace std;
using namespace boost;
namespace avg {
GLBufferCache::GLBufferCache()
{
}
GLBufferCache::~GLBufferCache()
{
deleteBuffers();
}
unsigned int GLBufferCache::getBuffer()
{
unsigned int bufferID;
if (m_BufferIDs.empty()) {
glproc::GenBuffers(1, &bufferID);
GLContext::checkError("PBO: GenBuffers()");
} else {
bufferID = m_BufferIDs.back();
m_BufferIDs.pop_back();
}
return bufferID;
}
void GLBufferCache::returnBuffer(unsigned int bufferID)
{
m_BufferIDs.push_back(bufferID);
}
unsigned int GLBufferCache::getNumBuffers() const
{
return m_BufferIDs.size();
}
void GLBufferCache::deleteBuffers()
{
for (unsigned i=0; i<m_BufferIDs.size(); ++i) {
glproc::DeleteBuffers(1, &(m_BufferIDs[i]));
}
m_BufferIDs.clear();
}
}
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