PGPLOT Module: PGQVSZ -- inquire size of view surface


SUBROUTINE PGQVSZ (UNITS, X1, X2, Y1, Y2)
INTEGER UNITS
REAL X1, X2, Y1, Y2

This routine returns the dimensions of the view surface (the maximum
plottable area) of the currently selected graphics device, in
a variety of units. The size of the view surface is device-dependent
and is established when the graphics device is opened. On some
devices, it can be changed by calling PGPAP before starting a new
page with PGPAGE. On some devices, the size can be changed (e.g.,
by a workstation window manager) outside PGPLOT, and PGPLOT detects
the change when PGPAGE is used. Call this routine after PGPAGE to
find the current size.

Note 1: the width and the height of the view surface in normalized
device coordinates are both always equal to 1.0.

Note 2: when the device is divided into panels (see PGSUBP), the
view surface is a single panel.


Arguments
UNITS (input) : 0,1,2,3 for output in normalized device coords,
inches, mm, or device units (pixels)
X1 (output) : always returns 0.0
X2 (output) : width of view surface
Y1 (output) : always returns 0.0
Y2 (output) : height of view surface