Binds the mask slot of a graphics port to a rectangular area across the execution of a body of code.
with-graphics-mask (port mask &key)
&body body => result
port
A graphics port
mask
A list of the form ( x y width height ) or nil
(
)
nil
body
A body of Lisp code
result
The return value of the last form executed in body
The with-graphics-mask macro binds the mask slot of port 's graphic state to a rectangular area across the execution of body .
with-graphics-mask
