a = get_alpha(x, y)



set_alpha(x, y, a)


m = get_mask(x, y)    -- added in 16.02


set_mask(x, y, m)    -- added in 16.02


r, g, b = get_color()  -- Gets the current brush color


r, g, b = get_color1()   -- Gets the current color from slot 1


r, g, b = get_color2()  -- Gets the current color from slot 2


r, g, b = get_color3() -- Gets the current color from slot 3


r, g, b = get_color4() -- Gets the current color from slot 4


single_buffer() -- All functions work from the same buffer


message_box(message, title) -- Display message box


merge(merge_mode, opacity) -- Like the flush() method but a merge mode and opacity can be specified for the 
merging of the destination buffer back into the source buffer. The valid merge types are listed here.


output_debug_string(message) -- Send the string to the Windows debug monitor.


is_escape() -- Returns 1 if the escape key is currently pressed.