%!
%    Copyright (C) 1999 Aladdin Enterprises.  All rights reserved.
% 
% This file is part of AFPL Ghostscript.
% 
% AFPL Ghostscript is distributed with NO WARRANTY OF ANY KIND.  No author or
% distributor accepts any responsibility for the consequences of using it, or
% for whether it serves any particular purpose or works at all, unless he or
% she says so in writing.  Refer to the Aladdin Free Public License (the
% "License") for full details.
% 
% Every copy of AFPL Ghostscript must include a copy of the License, normally
% in a plain ASCII text file named PUBLIC.  The License grants you the right
% to copy, modify and redistribute AFPL Ghostscript, but only under certain
% conditions described in the License.  Among other things, the License
% requires that the copyright notice and this notice be preserved on all
% copies.

% $Id: gsnup.ps,v 1.2 2000/09/19 18:29:11 lpd Exp $
% Prefix this to very well-behaved PostScript files for n-up printing.

/cdef { 1 index where { pop pop } { def } ifelse } def

%%%%%%%%%%%%%%%% Begin parameters %%%%%%%%%%%%%%%%

% All parameters are also settable from the command line with -d, e.g.,
% -d.Nx=3

/.Nx 2 cdef			% # of pages across the physical page
/.Ny 2 cdef			% # of pages down the physical page
/.Landscape false cdef		% if true, rotate page by 90 degrees

%%%%%%%%%%%%%%%% End parameters %%%%%%%%%%%%%%%%

vmstatus pop pop 0 eq { save pop } if
.Landscape {
  currentpagedevice /PageSize get aload pop
  exch 2 array astore
  1 dict dup /PageSize 4 -1 roll put
  setpagedevice
} if
/.BP currentpagedevice /BeginPage get def
/.EP currentpagedevice /EndPage get def
/.Ps 1 string def	% survive save/restore
/.Pn { .Ps 0 get } def
true setglobal		% protect from restore
/.ELevel [0] def
/.Rmat matrix def
false setglobal
/.max { 2 copy lt { exch } if pop } cdef
% Work around the common save ... showpage ... restore locution.
/restore {
  .Rmat currentmatrix pop restore
  vmstatus pop pop .ELevel 0 get lt { .Rmat setmatrix } if
} bind def
<<
  /BeginPage {
    .BP .Nx .Ny .max
    gsave
      initclip clippath pathbbox exch 4 -1 roll sub 3 1 roll exch sub
    grestore
    2 copy exch .Nx div exch .Ny div
    .Pn dup .Nx mod exch .Nx idiv .Ny 1 sub exch sub
		% Stack: nmax pw ph pw/nx ph/ny ix iy
    exch 3 index mul exch 2 index mul
    translate
		% Stack: nmax pw ph pw/nx ph/ny
    4 -1 roll 4 index div 4 -1 roll 4 index div
		% Stack: nmax pw/nx ph/ny pw/nmax ph/nmax
    exch 4 -1 roll exch sub 2 div
    3 1 roll sub 2 div
    translate
		% Stack: nmax
    1 exch div dup scale
  }
  /EndPage {
    .ELevel 0 vmstatus pop pop put
    .Ps 0 .Pn 1 add .Nx .Ny mul mod put    
    .Pn 0 eq {
      .EP
    } {
      pop pop false
    } ifelse
  }
>> setpagedevice
/.EOJ {
  { .Pn 0 eq { exit } if showpage } loop
} def

{ currentfile cvx exec .EOJ } exec