CLEARSCREEN

Graphics Subroutine: Erases the target area and fills it with the current background color.

Module: USE DFLIB

Syntax

CALL CLEARSCREEN (area)

area
(Input) INTEGER(4). Identifies the target area. Must be one of the following symbolic constants (defined in DFLIB.F90 in the \DF98\INCLUDE subdirectory):

• $GCLEARSCREEN - Clears the entire screen.
• $GVIEWPORT - Clears only the current viewport.
• $GWINDOW - Clears only the current text window (set with SETTEXTWINDOW).

All pixels in the target area are set to the color specified with SETBKCOLORRGB. The default color is black.

Compatibility

STANDARD GRAPHICS QUICKWIN GRAPHICS LIB

See Also: GETBKCOLORRGB, SETBKCOLORRGB, SETTEXTWINDOW, SETVIEWPORT

Example

USE DFLIB
CALL CLEARSCREEN($GCLEARSCREEN)