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Re: Ideas of a new version of PostScript (called "Computer PostScript")

From Lawrence D'Oliveiro <ldo@nz.invalid>
Newsgroups comp.lang.postscript
Subject Re: Ideas of a new version of PostScript (called "Computer PostScript")
Date 2024-03-08 20:53 +0000
Organization A noiseless patient Spider
Message-ID <usftrc$1t89i$3@dont-email.me> (permalink)
References <1705687027.bystand@zzo38computer.org> <usbjbe$t2sj$1@dont-email.me> <1709852337.bystand@zzo38computer.org> <usdj67$1a50p$4@dont-email.me> <1709924368.bystand@zzo38computer.org>

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On Fri, 08 Mar 2024 12:00:11 -0800, news wrote:

> There does seem some features of PostScript not implemented in Cairo,
> such as separations, and CMYK, and some other features. (As far as I can
> tell, the only colours implemented in Cairo are RGBA.)

That’s because CMYK is something specific to offset printers. Let the 
offset printer operators worry about its quirks: they are the ones paid to 
do it.

There are non-RGB colour spaces that are worth supporting, like HSV and 
HLS. My Python wrapper for Cairo <https://gitlab.com/ldo/qahirah> lets you 
freely interconvert between these spaces, even though the underlying Cairo 
API only ever sees RGBA. I even let you use X11 colour names.

> (I also wanted compatibility with most existing PostScript graphics
> code ...

Ah. Waste of time. Leave that in the museum, too. By all means extract the 
algorithms, just leave the actual code behind.

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Thread

Ideas of a new version of PostScript (called "Computer PostScript") news@zzo38computer.org.invalid - 2024-03-06 20:59 -0800
  Re: Ideas of a new version of PostScript (called "Computer PostScript") Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-03-07 05:29 +0000
    Re: Ideas of a new version of PostScript (called "Computer PostScript") news@zzo38computer.org.invalid - 2024-03-07 15:05 -0800
      Re: Ideas of a new version of PostScript (called "Computer PostScript") Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-03-07 23:38 +0000
        Re: Ideas of a new version of PostScript (called "Computer PostScript") news@zzo38computer.org.invalid - 2024-03-08 12:00 -0800
          Re: Ideas of a new version of PostScript (called "Computer PostScript") Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-03-08 20:53 +0000
    Re: Ideas of a new version of PostScript (called "Computer PostScript") David Newall <ghostscript@davidnewall.com> - 2024-03-26 16:20 +1100
      Re: Ideas of a new version of PostScript (called "Computer PostScript") news@zzo38computer.org.invalid - 2024-03-25 23:10 -0700
      Re: Ideas of a new version of PostScript (called "Computer PostScript") Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-03-26 06:20 +0000
        Re: Ideas of a new version of PostScript (called "Computer PostScript") rlhamil@smart.net (Richard L. Hamilton) - 2024-05-25 16:07 +0000
          Re: Ideas of a new version of PostScript (called "Computer PostScript") Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-05-25 22:31 +0000
  Re: Ideas of a new version of PostScript Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-03-21 07:31 +0000
  Re: Ideas of a new version of PostScript (called "Computer PostScript") Bozo User <anthk@disroot.org> - 2024-03-24 20:45 +0000
    Re: Ideas of a new version of PostScript (called "Computer PostScript") David Newall <ghostscript@davidnewall.com> - 2024-03-26 16:19 +1100

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