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- % Copyright (C) 1999, 2000 Aladdin Enterprises. All rights reserved.
- %
- % This file is part of GNU Ghostscript.
- %
- % GNU Ghostscript is distributed in the hope that it will be useful, but
- % WITHOUT ANY WARRANTY. No author or distributor accepts responsibility
- % to anyone for the consequences of using it or for whether it serves any
- % particular purpose or works at all, unless he says so in writing. Refer
- % to the GNU General Public License for full details.
- %
- % Everyone is granted permission to copy, modify and redistribute GNU
- % Ghostscript, but only under the conditions described in the GNU General
- % Public License. A copy of this license is supposed to have been given
- % to you along with GNU Ghostscript so you can know your rights and
- % responsibilities. It should be in a file named COPYING. Among other
- % things, the copyright notice and this notice must be preserved on all
- % copies.
-
- % $RCSfile: stocht.ps,v $ $Revision: 1.3.2.1 $
- % 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
-