Shader.h

#ifndef SHADER_H
#define SHADER_H

#include <GL/glew.h>

#include <string>
#include <fstream>
#include <sstream>
#include <iostream>

class Shader {
public:
    GLuint Program;

    Shader(const GLchar *vertexPath, const GLchar *fragmentPath) {
        std::string vertexCode;
        std::string fragmentCode;
        std::ifstream vShaderFile;
        std::ifstream fShaderFile;

        vShaderFile.exceptions(std::ifstream::badbit);
        fShaderFile.exceptions(std::ifstream::badbit);
        try {
            vShaderFile.open(vertexPath);
            fShaderFile.open(fragmentPath);
            std::stringstream vShaderStream, fShaderStream;

            vShaderStream << vShaderFile.rdbuf();
            fShaderStream << fShaderFile.rdbuf();

            vShaderFile.close();
            fShaderFile.close();

            vertexCode = vShaderStream.str();
            fragmentCode = fShaderStream.str();
        } catch (std::ifstream::failure e) {
            std::cout << "Error Reading Shader Files" << std::endl;
        }

        const GLchar *vShaderCode = vertexCode.c_str();
        const GLchar *fShaderCode = fragmentCode.c_str();

        GLuint vertex, fragment;
        GLint success;
        GLchar infoLog[512];

        vertex = glCreateShader(GL_VERTEX_SHADER);
        glShaderSource(vertex, 1, &vShaderCode, NULL);
        glCompileShader(vertex);

        glGetShaderiv(vertex, GL_COMPILE_STATUS, &success);
        if (!success) {
            glGetShaderInfoLog(vertex, 512, NULL, infoLog);
            std::cout << "Error Compiling Vertex Shader\n" << infoLog << std::endl;
        }

        fragment = glCreateShader(GL_FRAGMENT_SHADER);
        glShaderSource(fragment, 1, &fShaderCode, NULL);
        glCompileShader(fragment);

        glGetShaderiv(fragment, GL_COMPILE_STATUS, &success);
        if (!success) {
            glGetShaderInfoLog(fragment, 512, NULL, infoLog);
            std::cout << "Error Compiling Fragment Shader\n" << infoLog << std::endl;
        }

        this->Program = glCreateProgram();
        glAttachShader(this->Program, vertex);
        glAttachShader(this->Program, fragment);
        glLinkProgram(this->Program);

        glGetProgramiv(this->Program, GL_LINK_STATUS, &success);
        if (!success) {
            glGetProgramInfoLog(this->Program, 512, NULL, infoLog);
            std::cout << "Error linking Shader Program\n" << infoLog << std::endl;
        }

        glDeleteShader(vertex);
        glDeleteShader(fragment);
    }

    void Use() {
        glUseProgram(this->Program);
    }
};

#endif