KeosOGLBuffer.h

Go to the documentation of this file.

/*
 * This source file is part of KEOS (Free 3D Engine)
 * For the latest info, see http://www.keosengine.org/
 * E-mails : thierry.vouriot@keosengine.org, yeri@keosengine.org
 *
 * This program 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 program 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 program; if not, write to the Free Software Foundation, Inc., 59 Temple
 * Place - Suite 330, Boston, MA 02111-1307, USA, or go to
 * http://www.gnu.org/copyleft/lesser.txt.
 *
 */

#ifndef KEOS_OGLBUFFER_H
#define KEOS_OGLBUFFER_H

#include "KeosOGLPrerequisites.h"
#include "KeosBufferBase.h"
#include "KeosOGLEnum.h"

namespace Keos
{
  //-----------------------------------------------------------------------
  template <int Type>
  class COGLBuffer : public IBufferBase
  {
  public :

    COGLBuffer(ulong nCount, uint nBuffer);

    virtual ~COGLBuffer();

    uint GetBuffer() const;

  private :

    void* Lock(ulong nOffset, ulong nSize, ulong nFlags);

    void Unlock();

    // OGL buffer id
    uint m_nBuffer;
  };

  // Index and vertex buffer definition from COGLBuffer template
  typedef COGLBuffer<GL_ARRAY_BUFFER_ARB>         COGLVertexBuffer;
  typedef COGLBuffer<GL_ELEMENT_ARRAY_BUFFER_ARB> COGLIndexBuffer;


  //=======================================================================
  // COGLBuffer inline functions
  //=======================================================================

  //-----------------------------------------------------------------------
  template <int Type>
  inline COGLBuffer<Type>::COGLBuffer(ulong nCount, uint nBuffer) :
      IBufferBase(nCount),
      m_nBuffer   (nBuffer)
  {}

  //-----------------------------------------------------------------------
  template <int Type>
  inline COGLBuffer<Type>::~COGLBuffer()
  {
    if (m_nBuffer)
      COGLRenderSystem::glDeleteBuffersARB(1, &m_nBuffer);
  }

  //-----------------------------------------------------------------------
  template <int Type>
  inline uint COGLBuffer<Type>::GetBuffer() const
  {
    return m_nBuffer;
  }

  //-----------------------------------------------------------------------
  template <int Type>
  inline void* COGLBuffer<Type>::Lock(ulong nOffset, ulong nSize, ulong nFlags)
  {
    COGLRenderSystem::glBindBufferARB(Type, m_nBuffer);
    uchar* pBuffer = reinterpret_cast<uchar*>(COGLRenderSystem::glMapBufferARB(Type, COGLEnum::LockFlags(nFlags)));

    return pBuffer + nOffset;
  }

  //-----------------------------------------------------------------------
  template <int Type>
  inline void COGLBuffer<Type>::Unlock()
  {
    COGLRenderSystem::glUnmapBufferARB(Type);
  }

} // namespace Keos

#endif // KEOS_OGLBUFFER_H

---