vertexbuffer.h

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/* xoreos - A reimplementation of BioWare's Aurora engine
 *
 * xoreos is the legal property of its developers, whose names
 * can be found in the AUTHORS file distributed with this source
 * distribution.
 *
 * xoreos 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 3
 * of the License, or (at your option) any later version.
 *
 * xoreos 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 xoreos. If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef GRAPHICS_VERTEXBUFFER_H
#define GRAPHICS_VERTEXBUFFER_H

#include <vector>

#include "src/graphics/types.h"

namespace Graphics {

enum VertexAttribIdEnum {
    VPOSITION = 0, 
    VNORMAL,       
    VCOLOR,        
    VTCOORD        
};

struct VertexAttrib {
    GLuint index;          
    GLint size;            
    GLenum type;           
    GLsizei stride;        
    const GLvoid *pointer; 

    VertexAttrib() { }
    VertexAttrib(GLuint i, GLint s, GLenum t, GLsizei st = 0, const GLvoid *p = 0) :
        index(i), size(s), type(t), stride(st), pointer(p) { }

    GLvoid *getData();
    const GLvoid *getData() const;

    // Render methods
    void enable() const;
    void disable() const;
};

typedef std::vector<VertexAttrib> VertexDecl;

class IndexBuffer;

class VertexBuffer {
public:
    VertexBuffer();

    VertexBuffer(const VertexBuffer &other);

    ~VertexBuffer();

    VertexBuffer &operator=(const VertexBuffer &other);

    void setSize(uint32 vertCount, uint32 vertSize);

    void setVertexDecl(const VertexDecl &decl);

    void setVertexDeclLinear(uint32 vertCount, VertexDecl &decl);
    void setVertexDeclInterleave(uint32 vertCount, VertexDecl &decl);

    GLvoid *getData();

    const GLvoid *getData() const;

    GLvoid *getData(size_t vertexDecl);

    const GLvoid *getData(size_t vertexDecl) const;

    const VertexDecl &getVertexDecl() const;

    uint32 getCount() const;

    uint32 getSize() const;

    void initGL(GLuint hint = GL_STATIC_DRAW);

    void updateGL();

    void updateGLBound() const;

    void destroyGL();

    GLuint getVBO() const;

    // Render method

    void draw(GLenum mode, const IndexBuffer &indexBuffer) const;

private:
    VertexDecl _decl; 
    uint32 _count;    
    uint32 _size;     
    byte  *_data;     

    GLuint _vbo;      
    GLuint _hint;     

    static uint32 getTypeSize(GLenum type);
};

} // End of namespace Graphics

#endif // GRAPHICS_VERTEXBUFFER_H