| Allegro CL version 8.2 Unrevised from 8.1 to 8.2. 8.1 version |
Arguments: stream object
Returns t
if object is a
valid graphics-context for stream, and returns
nil
otherwise. Currently returns t
for any windows-graphics stream with any
graphics-context object, but in the future different kinds of stream
may require different graphics-contexts. stream
should be a cg-stream
.
See copy-graphics-context (where all the information in a graphics-context object is described), make-graphics-context, set-graphics-context, and restoring-graphics-context.
Copyright (c) 1998-2016, Franz Inc. Oakland, CA., USA. All rights reserved.
This page was not revised from the 8.1 page.
Created 2010.1.21.
| Allegro CL version 8.2 Unrevised from 8.1 to 8.2. 8.1 version |