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Text File | 2000-11-21 | 2.8 KB | 65 lines | [TEXT/R*ch] |
- % Copyright (C) 1999, 2000 Aladdin Enterprises. All rights reserved.
- %
- % This file is part of Aladdin Ghostscript.
- %
- % Aladdin 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 Ghostscript Free Public
- % License (the "License") for full details.
- %
- % Every copy of Aladdin 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 Aladdin 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: stocht.ps,v 1.2 2000/03/10 03:34:44 lpd 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
-