| Allegro CL version 6.2 Minimally revised from 6.1 | |||||||||
Arguments: (stream) &body body
Calls copy-graphics-context to save the
current drawing style options of stream, then
executes the body, and then calls set-graphics-context to
restore the saved drawing style options. stream
should be a cg-stream.
This allows the body code to arbitrarily set temporary drawing style options without explicitly setting each one back afterward. An unwind-protect is used to ensure that the final call to set-graphics-context is always performed (as long as the call to copy-graphics-context was completed successfully). Returns the values returned by the body.
See copy-graphics-context (where all the information in a graphics-context object is described), make-graphics-context, set-graphics-context, and graphics-context-p.
Copyright (c) 1998-2002, Franz Inc. Oakland, CA., USA. All rights reserved.
Documentation for Allegro CL version 6.2. This page has had minimal revisions compared to the 6.1 page.
Created 2002.2.26.
| Allegro CL version 6.2 Minimally revised from 6.1 | |||||||||