1 files changed, 73 insertions, 0 deletions
diff --git a/src/graphics/GLBufferCache.cpp b/src/graphics/GLBufferCache.cpp
new file mode 100644
index 0000000..5acd1ce
--- /dev/null
+++ b/src/graphics/GLBufferCache.cpp
@@ -0,0 +1,73 @@
+//
+//  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();
+}
+
+}