GNU bug report logs - #72193
31.0.50; DocView on Postscript with SVG support

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Manuel Giraud <manuel <at> ledu-giraud.fr>
To: bug-gnu-emacs <at> gnu.org
Subject: 31.0.50; DocView on Postscript with SVG support
Date: Fri, 19 Jul 2024 14:30:54 +0200

Hi,

DocView seems to do the wrong thing on a Postscript file when there is
support for SVG in Emacs.  I also have "gs" and "mutool" installed.

How to reproduce:
    - emacs -Q
    - C-x C-f "existing-document.ps"
    - C-c C-c -> no images displayed

Looking for pages into the cache with `doc-view-dired-cache', it seems
that DocView has produced PNG content into files with "svg" extension.
Emacs then tries to display SVG images with PNG content and, obviously,
failed.

The following patch fixes the issue for me but maybe there is more than
meets the eye:

diff --git a/lisp/doc-view.el b/lisp/doc-view.el
index f96b1bad886..e3539f8f886 100644
--- a/lisp/doc-view.el
+++ b/lisp/doc-view.el
@@ -2151,6 +2151,7 @@ doc-view-set-up-single-converter
   (pcase-let ((`(,conv-function ,type ,extension)
                (pcase doc-view-doc-type
                  ('djvu (list #'doc-view-djvu->tiff-converter-ddjvu 'tiff "tif"))
+                 ((or 'ps 'postscript 'eps) (list #'doc-view-ps->png-converter-ghostscript 'png "png"))
                  (_ (if (and (eq doc-view-pdf->png-converter-function
                                  #'doc-view-pdf->png-converter-mupdf)
                              doc-view-mupdf-use-svg)



In GNU Emacs 31.0.50 (build 20, x86_64-unknown-openbsd7.5) of 2024-07-18
 built on computer
Repository revision: da97096fdbb50bf69348813c960eb8d10b2bdc44
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.12101013
System Description: OpenBSD computer 7.5 GENERIC.MP#191 amd64

Configured using:
 'configure CC=egcc CPPFLAGS=-I/usr/local/include
 LDFLAGS=-L/usr/local/lib MAKEINFO=gmakeinfo --prefix=/home/manuel/emacs
 --bindir=/home/manuel/bin --with-x-toolkit=no --without-cairo
 --without-compress-install'

Configured features:
DBUS FREETYPE GIF GLIB GMP GNUTLS GSETTINGS HARFBUZZ JPEG LCMS2 LIBOTF
LIBXML2 MODULES NOTIFY KQUEUE OLDXMENU PDUMPER PNG RSVG SQLITE3 THREADS
TIFF TREE_SITTER WEBP X11 XDBE XFT XIM XINPUT2 XPM ZLIB

Important settings:
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Major mode: ELisp/l

Minor modes in effect:
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/home/manuel/prog/elisp/exwm/exwm-core hides /home/manuel/.emacs.d/elpa/exwm-0.31/exwm-core
/home/manuel/prog/elisp/exwm/exwm-config hides /home/manuel/.emacs.d/elpa/exwm-0.31/exwm-config
/home/manuel/prog/elisp/exwm/exwm-background hides /home/manuel/.emacs.d/elpa/exwm-0.31/exwm-background
/home/manuel/.emacs.d/elpa/ef-themes-1.7.0/theme-loaddefs hides /home/manuel/emacs/share/emacs/31.0.50/lisp/theme-loaddefs

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Memory information:
((conses 16 1235798 352745) (symbols 48 72425 28)
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-- 
Manuel Giraud

Message #8 received at 72193 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Manuel Giraud <manuel <at> ledu-giraud.fr>, Tassilo Horn <tsdh <at> gnu.org>
Cc: 72193 <at> debbugs.gnu.org
Subject: Re: bug#72193: 31.0.50; DocView on Postscript with SVG support
Date: Sat, 20 Jul 2024 10:14:21 +0300

> Date: Fri, 19 Jul 2024 14:30:54 +0200
> From:  Manuel Giraud via "Bug reports for GNU Emacs,
>  the Swiss army knife of text editors" <bug-gnu-emacs <at> gnu.org>
> 
> DocView seems to do the wrong thing on a Postscript file when there is
> support for SVG in Emacs.  I also have "gs" and "mutool" installed.
> 
> How to reproduce:
>     - emacs -Q
>     - C-x C-f "existing-document.ps"
>     - C-c C-c -> no images displayed
> 
> Looking for pages into the cache with `doc-view-dired-cache', it seems
> that DocView has produced PNG content into files with "svg" extension.
> Emacs then tries to display SVG images with PNG content and, obviously,
> failed.
> 
> The following patch fixes the issue for me but maybe there is more than
> meets the eye:
> 
> diff --git a/lisp/doc-view.el b/lisp/doc-view.el
> index f96b1bad886..e3539f8f886 100644
> --- a/lisp/doc-view.el
> +++ b/lisp/doc-view.el
> @@ -2151,6 +2151,7 @@ doc-view-set-up-single-converter
>    (pcase-let ((`(,conv-function ,type ,extension)
>                 (pcase doc-view-doc-type
>                   ('djvu (list #'doc-view-djvu->tiff-converter-ddjvu 'tiff "tif"))
> +                 ((or 'ps 'postscript 'eps) (list #'doc-view-ps->png-converter-ghostscript 'png "png"))
>                   (_ (if (and (eq doc-view-pdf->png-converter-function
>                                   #'doc-view-pdf->png-converter-mupdf)
>                               doc-view-mupdf-use-svg)

Tassilo, any comments or suggestions?

Message #11 received at 72193 <at> debbugs.gnu.org (full text, mbox):

From: Tassilo Horn <tsdh <at> gnu.org>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 72193 <at> debbugs.gnu.org, Manuel Giraud <manuel <at> ledu-giraud.fr>
Subject: Re: bug#72193: 31.0.50; DocView on Postscript with SVG support
Date: Sat, 20 Jul 2024 22:27:03 +0200

Eli Zaretskii <eliz <at> gnu.org> writes:

Hi Manuel & Eli,

>> Looking for pages into the cache with `doc-view-dired-cache', it
>> seems that DocView has produced PNG content into files with "svg"
>> extension.  Emacs then tries to display SVG images with PNG content
>> and, obviously, failed.
>> 
>> The following patch fixes the issue for me but maybe there is more than
>> meets the eye:
>> 
>> diff --git a/lisp/doc-view.el b/lisp/doc-view.el
>> index f96b1bad886..e3539f8f886 100644
>> --- a/lisp/doc-view.el
>> +++ b/lisp/doc-view.el
>> @@ -2151,6 +2151,7 @@ doc-view-set-up-single-converter
>>    (pcase-let ((`(,conv-function ,type ,extension)
>>                 (pcase doc-view-doc-type
>>                   ('djvu (list #'doc-view-djvu->tiff-converter-ddjvu 'tiff "tif"))
>> +                 ((or 'ps 'postscript 'eps) (list #'doc-view-ps->png-converter-ghostscript 'png "png"))
>>                   (_ (if (and (eq doc-view-pdf->png-converter-function
>>                                   #'doc-view-pdf->png-converter-mupdf)
>>                               doc-view-mupdf-use-svg)
>
> Tassilo, any comments or suggestions?

The patch is absolutely correct.  That's been an oversight, I think.
Thanks Manuel!

Bye,
  Tassilo

Message #16 received at 72193-done <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Tassilo Horn <tsdh <at> gnu.org>
Cc: 72193-done <at> debbugs.gnu.org, manuel <at> ledu-giraud.fr
Subject: Re: bug#72193: 31.0.50; DocView on Postscript with SVG support
Date: Sun, 21 Jul 2024 10:27:06 +0300

> From: Tassilo Horn <tsdh <at> gnu.org>
> Cc: Manuel Giraud <manuel <at> ledu-giraud.fr>,  72193 <at> debbugs.gnu.org
> Date: Sat, 20 Jul 2024 22:27:03 +0200
> 
> Eli Zaretskii <eliz <at> gnu.org> writes:
> 
> Hi Manuel & Eli,
> 
> >> Looking for pages into the cache with `doc-view-dired-cache', it
> >> seems that DocView has produced PNG content into files with "svg"
> >> extension.  Emacs then tries to display SVG images with PNG content
> >> and, obviously, failed.
> >> 
> >> The following patch fixes the issue for me but maybe there is more than
> >> meets the eye:
> >> 
> >> diff --git a/lisp/doc-view.el b/lisp/doc-view.el
> >> index f96b1bad886..e3539f8f886 100644
> >> --- a/lisp/doc-view.el
> >> +++ b/lisp/doc-view.el
> >> @@ -2151,6 +2151,7 @@ doc-view-set-up-single-converter
> >>    (pcase-let ((`(,conv-function ,type ,extension)
> >>                 (pcase doc-view-doc-type
> >>                   ('djvu (list #'doc-view-djvu->tiff-converter-ddjvu 'tiff "tif"))
> >> +                 ((or 'ps 'postscript 'eps) (list #'doc-view-ps->png-converter-ghostscript 'png "png"))
> >>                   (_ (if (and (eq doc-view-pdf->png-converter-function
> >>                                   #'doc-view-pdf->png-converter-mupdf)
> >>                               doc-view-mupdf-use-svg)
> >
> > Tassilo, any comments or suggestions?
> 
> The patch is absolutely correct.  That's been an oversight, I think.
> Thanks Manuel!

Thanks, now installed on the emacs-30 branch, and closing the bug.

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