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#pragma once
#include "vbo.h"
#include <memory>
enum class VAOAttrib{
POS = 1,
NORM = 2,
UV = 4,
COLOR = 8
};
inline VAOAttrib operator|(VAOAttrib lhs, VAOAttrib rhs){
using VAOAttribType = std::underlying_type<VAOAttrib>::type;
return VAOAttrib(static_cast<VAOAttribType>(lhs) | static_cast<VAOAttribType>(rhs));
}
inline bool operator&(VAOAttrib lhs, VAOAttrib rhs){
using VAOAttribType = std::underlying_type<VAOAttrib>::type;
return static_cast<bool>(VAOAttrib(static_cast<VAOAttribType>(lhs) & static_cast<VAOAttribType>(rhs)));
}
class VAO
{
public:
VAO(std::shared_ptr<VBO> vbo, VAOAttrib attribs);
~VAO();
void bind();
void unbind();
void draw();
private:
void addAttribute(GLuint attrib_index, GLint attrib_size);
std::shared_ptr<VBO> m_vbo;
GLuint m_handle;
GLint m_curr_offset;
GLuint m_vert_size;
};
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