Name:         GRAREA

Purpose:      define a clipping window

Category:     GRAPHICS

File:         pgplot.src

Author:       T.J. Pearson

Use:          see description below.

Description:

            SUBROUTINE GRAREA (IDENT,X0,Y0,XSIZE,YSIZE)
      
       GRPCKG: Define a rectangular window in the current plotting area. All
       graphics (except characters written with GRCHAR) will be blanked
       outside this window.  The default window is the full plotting area
       defined by default or by GRSETS.
      
       Arguments:
      
       IDENT (input, integer): the plot identifier, returned by GROPEN.
       X0, Y0 (input, real): the lower left corner of the window, in absolute
             device coordinates.
       XSIZE, YSIZE (input, real): width and height of the window in absolute
             coordinates; if either is negative, the window will be reset to
             the full plotting area.

Updates:      Oct 16, 1998: JPT automatically extracted from source.