| Language Reference |
GBLKVPD Call
deletes the blanking viewport
- CALL GBLKVPD;
The GBLKVPD subroutine 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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