%N grlin0 %F $MIR/src/grlin0.f
%D Draw a line
%B
      SUBROUTINE GRLIN0 (XP,YP)

 GRPCKG (internal routine): draw a line from the current position to a
 specified position, which becomes the new current position. This
 routine takes care of clipping at the viewport boundary, dashed and
 thick lines.

 Arguments:

 XP, YP (input, real): absolute device coordinates of the end-point of
       the line.
