NAME

SYNOPSIS

NOTES

1

an invalid maskval is considered a terminal state transition.

EXAMPLE

function image_mask_clear0()
      a = fill_surface(32, 32, 255, 0, 0);
      b = instance_image(a);
      show_image({a, b});
      move_image(a, 32, 32);
      image_mask_clear(b, MASK_POSITION);
end

MISUSE

function image_mask_clear0()
      image_mask_clear(null_surface(32, 32, 0, 0, 0), math.random(1000000));
end

SEE ALSO: