/****************************************************************************

****************************************************************************/

#ifndef __CCVRETEXATTRIBBIND_H__
#define __CCVRETEXATTRIBBIND_H__

#include "base/ccMacros.h"
#include "base/CCRef.h"
#include "CCGL.h"
#include "math/CCMath.h"
#include "2d/CCGLProgram.h"
#include <set>

NS_CC_BEGIN

USING_NS_CC_MATH;

////vertex attribute/////
class VertexAttribType
{
    friend class VertexAttribBind;
    friend class GLProgram;
public:
    VertexAttribType();
    
    VertexAttribType(GLenum type, int size);
    
    int getByteSize();
    
protected:
    GLenum _type;
    int _size;
    int _location;
    int _offset;
};

////vertex attributes bind
class VertexAttribBind
{
public:
    VertexAttribBind(const VertexAttribType* elem, int count);
    
    VertexAttribBind(const std::vector<VertexAttribType>& elems);
    
    VertexAttribBind(const std::vector<GLProgramData::VertexAttib*>& attribs);
    
    virtual ~VertexAttribBind();
    
    /**
     * bind vertex attributes.
     *
     * @param   index Position in _vertexAttribs
     * @param  attribLocation location in shader. It can be queried from GLProgram, eg. program->getAttribLocation("a_position")
     */
    void bindAttribute(int index, int attribLocation);
    
    /**bind attributes pointer**/
    void bindAttributePtr(void* vertexPointer = nullptr);
    
protected:
    
    void setVertexAttribElems(const VertexAttribType* elem, int count);
    
    VertexAttribType* _vertexAttribs;
    int _vertexAtttribCount;
    int _stride;
};

NS_CC_END

#endif /* __CCVRETEXATTRIBBIND_H__ */