unsigned char* data = stbi_load((path + fileName).c_str(), &tmpWidth, &tmpHeight, &tmpNrChannels, 0);

    if(data){
        GLenum format;
        if(tmpNrChannels == 1)
            format = GL_RED;
        if(tmpNrChannels == 3)
            format = GL_RGB;
        if(tmpNrChannels == 4)
            format = GL_RGBA;

    glBindTexture(GL_TEXTURE_2D, id);
    glTexImage2D(GL_TEXTURE_2D, 0, format, tmpWidth, tmpHeight, 0, format, GL_UNSIGNED_BYTE, data);