surface_set_target(final_surface);
draw_clear_alpha(c_white, 1);
shader_set(shd_gaussian_horizontal);
shader_set_uniform_f(uni_resolution_hoz, var_resolution_x, var_resolution_y);
shader_set_uniform_f(uni_blur_amount_hoz, var_blur_amount);
draw_surface(surf, 0, 0);
shader_reset();
surface_reset_target();
if (shader_enabled)
    shader_set(shd_gaussian_vertical);
shader_set_uniform_f(uni_resolution_vert, var_resolution_x, var_resolution_y);
shader_set_uniform_f(uni_blur_amount_vert, var_blur_amount);
draw_surface(final_surface, 0, 0);
shader_reset();
draw_text(0, 0, string_hash_to_newline("Real FPS: " + string(fps_real)));
draw_text(0, 12, string_hash_to_newline("Blur amount(Q & A to adjust): " + string(var_blur_amount)));