% Copyright (C) 1999, 2000 Aladdin Enterprises. All rights reserved. % % This program is free software; you can redistribute it and/or modify it % under the terms of the GNU General Public License as published by the % Free Software Foundation; either version 2 of the License, or (at your % option) any later version. % % This program is distributed in the hope that it will be useful, but % WITHOUT ANY WARRANTY; without even the implied warranty of % MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General % Public License for more details. % % You should have received a copy of the GNU General Public License along % with this program; if not, write to the Free Software Foundation, Inc., % 59 Temple Place, Suite 330, Boston, MA, 02111-1307. % $Id: stocht.ps,v 1.3.6.1.2.1 2003/04/12 14:02:39 giles Exp $ % helper file to simplify use of Stochastic Halftone - uses ht_ccsto.ps % This file sets the /StochasticDefault /Halftone as the current % and the /Default halftoning, loading the Stochastic halftone % if required. % Stochastic halftoning is recommended for inkjet printers, and may % produce output as pleasing as the more computationally expensive % "error diffusion" that *some* device drivers provide. % For printing technologies other than inkjet, Stochastic halftoning % may not look better than standard screening. In particular, thermal % transfer and direct thermal tend to be better with standard ordered % screening methods. Some laser printers may produce "smoother" % looking gray shades with Stochastic halftoning. Try it, and if % you like it, use it. % Note that this /Default halftone can be overridden by PostScript % operators that set the screening or halftone (such as setscreen). % To make Stochastic Halftone be "sticky" so that other screening and % halftone setting in the subsequent PostScript will be ignored, use: % -c "<< /HalftoneMode 1 >> setuserparams" % on the command line prior to the file to be processed. For example, % % gs stocht.ps -c "<< /HalftoneMode 1 >> setuserparams" -f examples/tiger.ps % Alternatively, the command to set the /HalftoneMode userparam can be % concatenated to this file (see below). % ===================================================================== % Try to get the previously defined resource { /StochasticDefault /Halftone findresource } stopped { pop pop % Need to load the Stochastic Halftone using the lib file (ht_ccsto.ps) runlibfile } if % If we didn't error out by now, then go ahead and define the /Default /StochasticDefault /Halftone findresource /Default exch /Halftone defineresource sethalftone % Use the halftone % Uncomment the next line to make the Stocahstic halftoning be "sticky" % << /HalftoneMode 1 >> setuserparams