Returns
t
if the color specification for a given pixel should result in a pixel that is on in a 1 bit dithered bitmap.
The
dither-color-spec
returns
t
if
rgb-color-spec
should result in a pixel that is on in a 1-bit dithered bitmap. The current set of dithers is used in the decision.
Note: dithers do not affect drawing or the antialiasing that occurs when drawing in Cocoa.