with-inverse-graphics

with-inverse-graphics Macro

Summary

Executes all drawing function calls to a given port within the body of the macro with foreground and background colors swapped.

Package

graphics-ports

Signature

with-inverse-graphics (port) &body body => result

Arguments

`port`⇩	A graphics port.
`body`⇩	A body of Lisp code.

Values

result

The return value of the last form executed in body.

Description

The macro with-inverse-graphics evaluates the forms in body as an implicit progn with the foreground and background slots of the graphics-state of port swapped.