| Allegro CL version 8.2 Unrevised from 8.1 to 8.2. 8.1 version |
Arguments: stream left top right bottom
Unfills a rectangular area on stream from an upper-left position at
(left, top) to
a lower-right position a (right,
bottom). (Unfills means to fill
with the stream's background-color.)
stream should be a graphical-stream
. The other arguments should be
integers. To use a box object rather than individaul coordinates, see
erase-contents-box.
The filled area will include the pixels where the x coordinate is equal to left and those where the y coordinate is equal to top, but not the pixels where the x coordinate is equal to right or those where the y coordinate is equal to bottom.
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 |