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Re: max and min operators in draw_round_box

From: David Kastrup
Subject: Re: max and min operators in draw_round_box
Date: Wed, 09 Jan 2019 19:57:12 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux)

Tyler Mitchell <address@hidden> writes:

> On Wed, Jan 09, 2019 at 12:27:13PM +0000, Stephen Wilkinson wrote:
>> [...] it seems to be a struggle to get the postscript file to
>> open in anything at all.
> I looked at this and it seems the culprit is the draw_round_box
> procedure which uses 'max' and 'min' operators, which are not part
> of standard PostScript, but are available in Ghostscript:
> Adding this to the PostScript output (before draw_round_box is
> defined) makes it double-clickable in OS X:
>  /min { 2 copy gt { exch } if pop } bind def
>  /max { 2 copy lt { exch } if pop } bind def
> Is it possible to include these in so
> that the .ps output could be processed with non-Ghostscript
> interpreters?

I'd rather we make the input not depend on those functions in the first
place: the names are too generic for comfort.

Looks like my fault: their use can be traced to a commit of mine from
2013.  I'll fix that.

David Kastrup

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