draw_set_colour_write_enable(red, green, blue, alpha);
|red||The colour to set for drawing.|
|green||The colour to set for drawing.|
|blue||The colour to set for drawing.|
|alpha||The colour to set for drawing.|
With this function you can switch on or off the colour channels
and the alpha channel for all further drawing. You can use this
function to create alpha-channel only surfaces (switch off the RGB
writing before using the surface), or to create special effects
while drawing to the screen. The default value for each of the
components is true.
draw_set_colour_write_enable(false, false, true,
draw_set_colour_write_enable(true, true, true, true);
The above code will draw only the blue and alpha channel of the current sprite for the instance.