PMG

void LoadTexture (char *filename, long texture_id, long mag_filter, long min_filter,
                  long wrap_type, bool transparent = false) {
    SDL_Surface *image;
    image = IMG_Load (filename);
    if (image == NULL) {
        cout << "Couldn't load " << filename << ": " << SDL_GetError () << endl;
        return;
    }

    glBindTexture (GL_TEXTURE_2D, texture_name[texture_id]);

    if (transparent) {
        glTexImage2D (GL_TEXTURE_2D, 0, GL_RGBA, image->w, image->h, 0, GL_RGBA,
                      GL_UNSIGNED_BYTE, image->pixels);
        gluBuild2DMipmaps (GL_TEXTURE_2D, GL_RGBA, image->w, image->h, GL_RGBA,
                           GL_UNSIGNED_BYTE, image->pixels);
    }
    else {
        glTexImage2D (GL_TEXTURE_2D, 0, GL_RGB, image->w, image->h, 0, GL_RGB,
                      GL_UNSIGNED_BYTE, image->pixels);
        gluBuild2DMipmaps (GL_TEXTURE_2D, GL_RGB, image->w, image->h, GL_RGB,
                           GL_UNSIGNED_BYTE, image->pixels);
    };

    glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
    glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
    glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);

    GLenum error = glGetError ();
    cout << error << endl;
    //glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_R, GL_REPEAT);
    //glTexEnvi (GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
}