Shader.h

#pragma once
// system includes
#include <iostream>
#include <fstream>

#include "GL/glew.h"
#include "GLM/glm.hpp"

class Shader {

public:
        Shader();
        ~Shader();

        void loadCompileAndLinkShader(char* vertexShaderLocation, char* geometryShaderLocation, char* fragmentShaderLoacation);

        void loadCompileAndLinkShader(char* vertexShaderLocation, char* fragmentShaderLoacation);

        // Define the name of the variable inside the shader which represents the final color for each fragment.
        void bind_frag_data_location(const std::string &name)
        {
                if(shaderProgram > 0)
                {
                        glBindFragDataLocation(shaderProgram, 0, name.c_str() );
                        link();
                }
        }

        // Define the name of the variable inside the shader which represents the final color for each fragment.
        void bind_frag_data_location(const std::string &name, const std::string &name2)
        {
                if(shaderProgram > 0)
                {
                        glBindFragDataLocation(shaderProgram, 0, name.c_str() );
                        glBindFragDataLocation(shaderProgram, 1, name2.c_str() );
                        link();
                }
        }

        GLint getShaderProgram() const;

private:
        GLint shaderProgram;
        GLuint vertex_shader_handle;
        GLuint fragment_shader_handle;
        GLuint geometry_shader_handle;

        void loadAndCompile(char* vertexShaderLocation, char* fragmentShaderLoacation);

        void loadAndCompile(char* vertexShaderLocation, char* geometryShaderLocation, char* fragmentShaderLoacation);


        void link();
};