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% Copyright (C) 2001-2018 Artifex Software, Inc. % All Rights Reserved. % % This software is provided AS-IS with no warranty, either express or % implied. % % This software is distributed under license and may not be copied, % modified or distributed except as expressly authorized under the terms % of the license contained in the file LICENSE in this distribution. % % Refer to licensing information at http://www.artifex.com or contact % Artifex Software, Inc., 1305 Grant Avenue - Suite 200, Novato, % CA 94945, U.S.A., +1(415)492-9861, for further information. % % 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.eps % 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