Re: Ghostscript

[Richard Shann]

On Thu, 2022-02-17 at 18:50 +0000, Joe Wilkinson wrote:
> I'll have a look tomorrow then.
> Presumably you could use \\ rather than /??

At first I assumed it was a matter of escaping the backslashes - the
whole thing being complicated by both the debugger and guile displaying
the path as containing \\ - just their way of displaying a backslash.
But Windows has supported / as a file name separator for years now, but
the temporary filename generator doesn't use it. So I had to come up
with this delicious piece of gobbledy-gook to replace all \ with / in
the (d-GetCurrentTypesetPDF)

(string-map (lambda (c) (if (equal? c #\\) #\/ c))(d-GetCurrentTypesetPDF))

this would have the unfortunate consequence of garbling any file name
that actually had an embedded backslash :) (only possible in Unix where
filenames can contain anything except a 0).

Besides testing if gs.exe shipped with Denemo would work I also didn't
test that you can create more than one book in succession - there is
always some doubt because Windows often thinks a file is "in use" and
refuses to re-use it.

Richard




> Joe
> 
> On 17/02/2022 17:32, Richard Shann wrote:
> > On Tue, 2022-02-15 at 16:27 +0000, angelaandjoe.wilkinson wrote:
> > >   Hi Richard,
> > >   Beginners page tells me that perhaps we need a different
> > > version of
> > > Ghostscript, not gs.exe?
> > Well, those are pre-built versions of ghostscript with whatever
> > name
> > Artifex's build system chooses to give them, the gs.exe that is
> > shipped
> > with Denemo is built from source. It is there as part of the
> > LilyPond
> > which is also built from source, but it may well need some
> > environment
> > variables set to get it going, which LilyPond will be taking care
> > of.
> > 
> > After a hard battle I've got the export of a book of layouts
> > working on
> > a windows laptop using a installed version of ghostscript; I've not
> > tested it on the internal version, but it would be worth doing
> > that.
> > You choose what to use in Edit->Change Preferences->ghostscript
> > putting the full path to gswin64c.exe should work.
> > Remarkably, despite all assurances in chatter on the internet
> > ghostscript was barfing on the windows backslash path separator, I
> > had
> > to switch them to forward slashes to get it working.
> > 
> > It will be built tonight as usual.
> > 
> > Richard
> > 
> > 
> > 
> > >   Joe
> > >      System Invocation Name  Unix gs  VMS gs  MS Windows 95 and
> > > later
> > > gswin32.exe
> > >   gswin32c.exe
> > >   gswin64.exe
> > >   gswin64c.exe  OS/2 gsos2
> > 
>