GNU bug report logs - #73501
30.0.91; zoom smaller/larger svg image file unresponsive

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

From: Van Ly <van.ly <at> sdf.org>
To: bug-gnu-emacs <at> gnu.org
Subject: 30.0.91; zoom smaller/larger svg image file unresponsive
Date: Thu, 26 Sep 2024 15:49:48 +0000

[Message part 1 (text/plain, inline)]

Hello,

Using the following svg image file

 -> https://commons.wikimedia.org/wiki/File:CaldwellStarChart.svg

when "emacs -Q" is toggled fullscreen on 1080p display and the above
file is opened, "C-x C-+" and "C-x C--" text-scale-adjust command won't
zoom to enlarge or shrink the rendered image.

The svg image is displayed at 50-percent the width of fullscreen.

If "emacs -Q" is opened and left at the default frame size and the svg
file is opened, the smaller displayed svg image (See A) will zoom to
enlarge once at 50-percent the width of screen after the frame is
toggled fullscreen (See B).

Expected behavior is zoom to enlarge/shrink happens in response to "C-x C-+" and "C-x C--".

 -> http://sdf.org/~van.ly/img/emacs-30-0-91-pretest-svg-default-frame.jpeg A
 -> http://sdf.org/~van.ly/img/emacs-30-0-91-pretest-svg-fullscreen.jpeg B

[bug-gnu-emacs-report.text (application/octet-stream, attachment)]

[Message part 3 (text/plain, inline)]

-- 
vl

Message #8 received at 73501 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Van Ly <van.ly <at> sdf.org>
Cc: 73501 <at> debbugs.gnu.org
Subject: Re: bug#73501: 30.0.91;
 zoom smaller/larger svg image file unresponsive
Date: Thu, 26 Sep 2024 19:40:25 +0300

> Date: Thu, 26 Sep 2024 15:49:48 +0000
> From:  Van Ly via "Bug reports for GNU Emacs,
>  the Swiss army knife of text editors" <bug-gnu-emacs <at> gnu.org>
> 
> Using the following svg image file
> 
>  -> https://commons.wikimedia.org/wiki/File:CaldwellStarChart.svg
> 
> when "emacs -Q" is toggled fullscreen on 1080p display and the above
> file is opened, "C-x C-+" and "C-x C--" text-scale-adjust command won't
> zoom to enlarge or shrink the rendered image.

I cannot reproduce this: I can zoom in or out this file in full-screen
Emacs frame.

> Expected behavior is zoom to enlarge/shrink happens in response to "C-x C-+" and "C-x C--".

I get the expected behavior.

Do you see something interesting in *Messages*?

Message #11 received at 73501 <at> debbugs.gnu.org (full text, mbox):

From: Van Ly <van.ly <at> sdf.org>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 73501 <at> debbugs.gnu.org
Subject: Re: bug#73501: 30.0.91; zoom smaller/larger svg image file
 unresponsive
Date: Fri, 27 Sep 2024 09:36:11 +0000

[Message part 1 (text/plain, inline)]

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

>> Date: Thu, 26 Sep 2024 15:49:48 +0000
>> From:  Van Ly via "Bug reports for GNU Emacs,
>>  the Swiss army knife of text editors" <bug-gnu-emacs <at> gnu.org>
>> 
>> Using the following svg image file
>> 
>>  -> https://commons.wikimedia.org/wiki/File:CaldwellStarChart.svg
>> 
>> when "emacs -Q" is toggled fullscreen on 1080p display and the above
>> file is opened, "C-x C-+" and "C-x C--" text-scale-adjust command won't
>> zoom to enlarge or shrink the rendered image.
>
> I cannot reproduce this: I can zoom in or out this file in full-screen
> Emacs frame.
>
>> Expected behavior is zoom to enlarge/shrink happens in response to "C-x C-+" and "C-x C--".
>
> I get the expected behavior.
>
> Do you see something interesting in *Messages*?
>

# Contents of *Messages*

1 For information about GNU Emacs and the GNU system, type C-h C-a.
2 Type C-c C-c to view the image as text
3 Use +, =, -, 0, C-+, C-=, C--, C-0 for further adjustment [5 times]

The above 5 attempts to enlarge at fullscreen does nothing.

I see the svg image resize automatically at fullwidth from default frame
size to 50-percent of fullscreen, toggling back to default frame size
will automatically shrink the svg image file.

As attached below, I see two SVG libraries for GNOME installed but my
emacs is linked to LUCID X toolkit.

[x (application/octet-stream, attachment)]

[Message part 3 (text/plain, inline)]

-- 
vl

Message #14 received at 73501 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Van Ly <van.ly <at> sdf.org>
Cc: 73501 <at> debbugs.gnu.org
Subject: Re: bug#73501: 30.0.91; zoom smaller/larger svg image file
 unresponsive
Date: Fri, 27 Sep 2024 13:40:37 +0300

> From: Van Ly <van.ly <at> sdf.org>
> Cc: 73501 <at> debbugs.gnu.org
> Date: Fri, 27 Sep 2024 09:36:11 +0000
> 
> Eli Zaretskii <eliz <at> gnu.org> writes:
> 
> > I cannot reproduce this: I can zoom in or out this file in full-screen
> > Emacs frame.
> >
> >> Expected behavior is zoom to enlarge/shrink happens in response to "C-x C-+" and "C-x C--".
> >
> > I get the expected behavior.
> >
> > Do you see something interesting in *Messages*?
> >
> 
> # Contents of *Messages*
> 
> 1 For information about GNU Emacs and the GNU system, type C-h C-a.
> 2 Type C-c C-c to view the image as text
> 3 Use +, =, -, 0, C-+, C-=, C--, C-0 for further adjustment [5 times]
> 
> The above 5 attempts to enlarge at fullscreen does nothing.

Then I have no idea what happens in your case.  Maybe it's your
version of librsvg, or maybe it's something else.

Can anyone reproduce this issue and debug it?

> I see the svg image resize automatically at fullwidth from default frame
> size to 50-percent of fullscreen, toggling back to default frame size
> will automatically shrink the svg image file.

That's expected, and AFAIU is unrelated to the issue at hand.  See
image-auto-resize.

Message #17 received at 73501 <at> debbugs.gnu.org (full text, mbox):

From: Van Ly <van.ly <at> sdf.org>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 73501 <at> debbugs.gnu.org
Subject: Re: bug#73501: 30.0.91; zoom smaller/larger svg image file
 unresponsive
Date: Fri, 27 Sep 2024 12:14:13 +0000

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

>> From: Van Ly <van.ly <at> sdf.org>
>> Cc: 73501 <at> debbugs.gnu.org
>> Date: Fri, 27 Sep 2024 09:36:11 +0000
>> 
>> Eli Zaretskii <eliz <at> gnu.org> writes:
>> 
>> > I cannot reproduce this: I can zoom in or out this file in full-screen
>> > Emacs frame.
>> >
>> >> Expected behavior is zoom to enlarge/shrink happens in response to "C-x C-+" and "C-x C--".
>> >
>> > I get the expected behavior.
>> >
>> > Do you see something interesting in *Messages*?
>> >
>> 
>> # Contents of *Messages*
>> 
>> 1 For information about GNU Emacs and the GNU system, type C-h C-a.
>> 2 Type C-c C-c to view the image as text
>> 3 Use +, =, -, 0, C-+, C-=, C--, C-0 for further adjustment [5 times]
>> 
>> The above 5 attempts to enlarge at fullscreen does nothing.
>
> Then I have no idea what happens in your case.  Maybe it's your
> version of librsvg, or maybe it's something else.
>

I tried downselecting the rsvg library in the package manager to prefer
the C only implementation, rebuilt Emacs and see the same behavior.

  1 $ pkgin se rsvg
  2 pkgin se rsvg
  3 librsvg-2.58.0nb1 <  SVG library for GNOME
  4 librsvg-2.40.21nb18 = SVG library for GNOME (2.40.xx branch, C only)
  5 ruby31-rsvg2-4.2.2nb1  Ruby binding of librsvg
  6 ruby32-rsvg2-4.2.2nb1  Ruby binding of librsvg
  7 ruby33-rsvg2-4.2.2nb1  Ruby binding of librsvg
  8 
  9 =: package is installed and up-to-date
 10 <: package is installed but newer version is available
 11 >: installed package has a greater version than available package

> Can anyone reproduce this issue and debug it?
>



-- 
vl

Message #20 received at 73501 <at> debbugs.gnu.org (full text, mbox):

From: Van Ly <van.ly <at> sdf.org>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 73501 <at> debbugs.gnu.org
Subject: Re: bug#73501: 30.0.91; zoom smaller/larger svg image file
 unresponsive
Date: Fri, 27 Sep 2024 12:29:57 +0000

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

>> 
>> The above 5 attempts to enlarge at fullscreen does nothing.
>
> Then I have no idea what happens in your case.  Maybe it's your
> version of librsvg, or maybe it's something else.
>

Control + Mouse 3 context menu to select Fit Image to Window will zoom
to enlarge fullscreen, see below

 => http://sdf.org/~van.ly/img/emacs-30-0-91-svg-image-fullscreen.jpeg

Countrol + Mouse 3 context menu to select Zoom In and Zoom Out will
enlarge/shrink as expected.

So it seems C-x C-+ and C-x C-- are not calling Zoom In and Zoom Out on
the svg image.

-- 
vl

Message #23 received at 73501 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Van Ly <van.ly <at> sdf.org>
Cc: 73501 <at> debbugs.gnu.org
Subject: Re: bug#73501: 30.0.91; zoom smaller/larger svg image file
 unresponsive
Date: Fri, 27 Sep 2024 16:00:21 +0300

> From: Van Ly <van.ly <at> sdf.org>
> Cc: 73501 <at> debbugs.gnu.org
> Date: Fri, 27 Sep 2024 12:29:57 +0000
> 
> 
> Eli Zaretskii <eliz <at> gnu.org> writes:
> 
> >> 
> >> The above 5 attempts to enlarge at fullscreen does nothing.
> >
> > Then I have no idea what happens in your case.  Maybe it's your
> > version of librsvg, or maybe it's something else.
> >
> 
> Control + Mouse 3 context menu to select Fit Image to Window will zoom
> to enlarge fullscreen, see below
> 
>  => http://sdf.org/~van.ly/img/emacs-30-0-91-svg-image-fullscreen.jpeg
> 
> Countrol + Mouse 3 context menu to select Zoom In and Zoom Out will
> enlarge/shrink as expected.
> 
> So it seems C-x C-+ and C-x C-- are not calling Zoom In and Zoom Out on
> the svg image.

What does "C-h c C-x C-+" tell you?

Message #26 received at 73501 <at> debbugs.gnu.org (full text, mbox):

From: Manuel Giraud <manuel <at> ledu-giraud.fr>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: Van Ly <van.ly <at> sdf.org>, 73501 <at> debbugs.gnu.org
Subject: Re: bug#73501: 30.0.91; zoom smaller/larger svg image file
 unresponsive
Date: Fri, 27 Sep 2024 15:06:34 +0200

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

[...]

>> # Contents of *Messages*
>> 
>> 1 For information about GNU Emacs and the GNU system, type C-h C-a.
>> 2 Type C-c C-c to view the image as text
>> 3 Use +, =, -, 0, C-+, C-=, C--, C-0 for further adjustment [5 times]
>> 
>> The above 5 attempts to enlarge at fullscreen does nothing.
>
> Then I have no idea what happens in your case.  Maybe it's your
> version of librsvg, or maybe it's something else.
>
> Can anyone reproduce this issue and debug it?

I can reproduce it.  But I don't know if it is expected to work: "C-x
C-+" is `text-scale-adjust' and works with text buffers adjusting the
font size.

For an image buffer, I think one should use `image-increase-size' and
the like which are bound in a keymap starting with 'i'.

Maybe "C-x C-+" should be bound differently in an image buffer?
-- 
Manuel Giraud

Message #29 received at 73501 <at> debbugs.gnu.org (full text, mbox):

From: Joost Kremers <joostkremers <at> fastmail.fm>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: Van Ly <van.ly <at> sdf.org>, 73501 <at> debbugs.gnu.org
Subject: Re: bug#73501: 30.0.91; zoom smaller/larger svg image file
 unresponsive
Date: Fri, 27 Sep 2024 15:46:19 +0200

On Fri, Sep 27 2024, Eli Zaretskii wrote:
> Can anyone reproduce this issue and debug it?

`C-x C-=` / `C-x C--` don't change the image size for me either. However,
`i +` and `i -` do. Emacs 29.4, Arch Linux, Wayland.

-- 
Joost Kremers
Life has its moments

Message #32 received at 73501 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Manuel Giraud <manuel <at> ledu-giraud.fr>
Cc: van.ly <at> sdf.org, 73501 <at> debbugs.gnu.org
Subject: Re: bug#73501: 30.0.91; zoom smaller/larger svg image file
 unresponsive
Date: Fri, 27 Sep 2024 16:22:07 +0300

> From: Manuel Giraud <manuel <at> ledu-giraud.fr>
> Cc: Van Ly <van.ly <at> sdf.org>,  73501 <at> debbugs.gnu.org
> Date: Fri, 27 Sep 2024 15:06:34 +0200
> 
> Eli Zaretskii <eliz <at> gnu.org> writes:
> 
> > Can anyone reproduce this issue and debug it?
> 
> I can reproduce it.  But I don't know if it is expected to work: "C-x
> C-+" is `text-scale-adjust' and works with text buffers adjusting the
> font size.
> 
> For an image buffer, I think one should use `image-increase-size' and
> the like which are bound in a keymap starting with 'i'.
> 
> Maybe "C-x C-+" should be bound differently in an image buffer?

No, it shouldn't.  I think this is just a misunderstanding: zoom-in
and zoom-out for images are bound to other keys, not to "C-x C-+".  I
tried C-mouse-wheel instead, and it does zoom images.

Message #35 received at 73501 <at> debbugs.gnu.org (full text, mbox):

From: Van Ly <van.ly <at> sdf.org>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 73501 <at> debbugs.gnu.org
Subject: Re: bug#73501: 30.0.91; zoom smaller/larger svg image file
 unresponsive
Date: Fri, 27 Sep 2024 18:03:47 +0000

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

>> So it seems C-x C-+ and C-x C-- are not calling Zoom In and Zoom Out on
>> the svg image.
>
> What does "C-h c C-x C-+" tell you?

I think at the head of this bug report I mentioned text-scale-adjust.

Now, I know image scale adjust does not use C-x C-+ but i + and other
keybindings listed in the context menu on C-Mouse 3 button.

-- 
vl

Message #40 received at 73501-done <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Van Ly <van.ly <at> sdf.org>
Cc: 73501-done <at> debbugs.gnu.org
Subject: Re: bug#73501: 30.0.91; zoom smaller/larger svg image file
 unresponsive
Date: Sat, 12 Oct 2024 14:19:42 +0300

> From: Van Ly <van.ly <at> sdf.org>
> Cc: 73501 <at> debbugs.gnu.org
> Date: Fri, 27 Sep 2024 18:03:47 +0000
> 
> 
> Eli Zaretskii <eliz <at> gnu.org> writes:
> 
> >> So it seems C-x C-+ and C-x C-- are not calling Zoom In and Zoom Out on
> >> the svg image.
> >
> > What does "C-h c C-x C-+" tell you?
> 
> I think at the head of this bug report I mentioned text-scale-adjust.
> 
> Now, I know image scale adjust does not use C-x C-+ but i + and other
> keybindings listed in the context menu on C-Mouse 3 button.

Thanks, closing.

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