GLVertexBufferObject.h

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////////////////////////////////////////////////////////////////////////////////
//    Scorched3D (c) 2000-2009
//
//    This file is part of Scorched3D.
//
//    Scorched3D is free software; you can redistribute it and/or modify
//    it under the terms of the GNU General Public License as published by
//    the Free Software Foundation; either version 2 of the License, or
//    (at your option) any later version.
//
//    Scorched3D 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 General Public License for more details.
//
//    You should have received a copy of the GNU General Public License
//    along with Scorched3D; if not, write to the Free Software
//    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
////////////////////////////////////////////////////////////////////////////////

#if !defined(__INCLUDE_GLVertexBufferObjecth_INCLUDE__)
#define __INCLUDE_GLVertexBufferObjecth_INCLUDE__

#include <GLEXT/GLState.h>

class GLVertexBufferObject
{
public:
        ///> create buffer. Tell the handler if you wish to store indices or other data.
        GLVertexBufferObject(bool indexbuffer = false);
        ~GLVertexBufferObject();

        ///> call ONCE after creation, to set data size and optionally data.
        ///> pointer to data can be NULL to just (re)size the buffer.
        ///> usage can be one of GL_STREAM_DRAW_ARB, GL_STREAM_READ_ARB,
        ///> GL_STREAM_COPY_ARB, GL_STATIC_DRAW_ARB, GL_STATIC_READ_ARB,
        ///> GL_STATIC_COPY_ARB, GL_DYNAMIC_DRAW_ARB, GL_DYNAMIC_READ_ARB,
        ///> GL_DYNAMIC_COPY_ARB
        void init_data(unsigned size, const void* data, int usage);
        ///> init/set sub data
        void init_sub_data(unsigned offset, unsigned subsize, const void* data);
        ///> bind buffer
        void bind() const;
        ///> unbind buffer
        void unbind() const;
        ///> map buffer to address, access is one of GL_READ_ONLY_ARB, GL_WRITE_ONLY_ARB,
        ///> GL_ERAD_WRITE_ARB.
        void* map(int access);
        ///> get size of mapped space
        unsigned int get_map_size() const { return size_; }
        ///> unmap buffer
        void unmap();

protected:
        GLuint id_;
        unsigned int size_;
        bool mapped_;
        int target_;
};

#endif // __INCLUDE_GLVertexBufferObjecth_INCLUDE__

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