((Draw))
// Works for only the first light
//Create the light surface and set it as target
if (!surface_exists(light_surf))
	light_surf = surface_create(room_width, room_height);
surface_set_target(light_surf);

//Clear the target surface to black
draw_clear_alpha(c_black, .9);

//Set the shader
shader_set(sh_Light);

//Set blendmode to multiply
gpu_set_blendmode_ext(bm_dest_color, bm_inv_src_alpha);

//Set the uniforms for each light object
with (o_Light) {

	shader_set_uniform_f(other.l_pos, x, y);
	shader_set_uniform_f(other.l_in_rad, in_rad);
	shader_set_uniform_f(other.l_out_rad, out_rad);
	shader_set_uniform_f(other.l_dir, dir);
	shader_set_uniform_f(other.l_fov, fov);

	//Draw the app_surf
	draw_surface(application_surface, 0, 0);

}

//Reset the surface target
surface_reset_target();

//Reset the blendmode to normal
gpu_set_blendmode(bm_normal);

//Draw the light_surf
draw_surface(light_surf, 0, 0);

//Reset the shader
shader_reset();



((Post-Draw))
draw_surface(light_surf, 0, 0);
draw_surface(application_surface, 0, 0);


((Fragment Shader))
[Light calculations]

vec3 diffuse_color = texture2D(gm_BaseTexture, v_vTexcoord).rgb;

gl_FragColor = vec4(diffuse_color, new_alpha);