GBLKVPD Call

Language Reference

GBLKVPD Call

deletes the blanking viewport

CALL GBLKVPD;

The GBLKVPD subroutine releases the current blanking area. It allows 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 statements shown below:

/* 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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	*`/ 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