CLEAR_CONTROL(3G)

NAME

clear_control − select the type of clearing for subsequent clear_view_surface procedures.

SYNOPSIS

C SYNTAX

void clear_control(fildes,mode);
int fildes,mode;

FORTRAN77 SYNTAX

subroutine clear_control(fildes,mode)
integer*4 fildes,mode

PASCAL SYNTAX

procedure clear_control(fildes,mode:integer);

HP-UX COMPATIBILITY

Level: HP-UX/STANDARD

Origin: ANSI Computer Graphics Interface

DESCRIPTION

INPUT PARAMETERS

fildes
is an integer file descriptor returned by gopen when an I/O path to a graphic device is opened.
mode
one of the following values:

   CLEAR_VDC_EXTENT - clears the Virtual Device Coordinate
                     extent area.
   CLEAR_CLIP_RECTANGLE - clears the clip rectangle area.
   CLEAR_DISPLAY_SURFACE - clear the entire display surface.

DISCUSSION

For continuous feed hard copy devices, CLEAR_DISPLAY_SURFACE will cause a new page action.

DEFAULTS

Clear the entire display surface.

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