Language Reference |
GBLKVPD Call |
The GBLKVPD subroutine is a graphical call that deletes and releases the current blanking area. It enables graphics output to be drawn in the area previously blanked out by a call to the GBLKVP subroutine.
To release an area previously blanked out, as in the example for the GBLKVP subroutine, use the following statement.
/* define blanking viewport */ call gblkvp({20 20, 80 80}); /* more graphics statements... */ /* now release the blanked out area */ call gblkvpd; /* graphics or text can now be written to the area */ /* continue graphics statements... */
See also the description of the CLIP option in the RESET statement.
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