bug#65187: 29.1; right edge of wide image can not be displayed in image-mode

bug#65187: 29.1; right edge of wide image can not be displayed in image-mode

[awrhygty]

Evaluate the following sexp and type C-e to display the right side of
the image.
The vertical red line on the right edge should be displayed.
But it is not displayed.

(let* ((w (+ (window-pixel-width) 100))
       (h 100)
       (stroke-width 4)
       (rect-w (- w stroke-width))
       (rect-h (- h stroke-width))
       (rect-x (/ stroke-width 2))
       (rect-y (/ stroke-width 2))
       (svg (format "\
<svg width=\"%d\" height=\"%d\">
<rect width=\"%d\" height=\"%d\" x=\"%d\" y=\"%d\"\
 fill=\"blue\" stroke=\"red\" stroke-width=\"%d\"/>
</svg>\
" w h rect-w rect-h rect-x rect-y stroke-width)))
  (switch-to-buffer (generate-new-buffer "tmpsvg"))
  (insert svg)
  (let ((image-auto-resize nil))
    (image-mode)))



In GNU Emacs 29.1 (build 2, x86_64-w64-mingw32) of 2023-08-02 built on
 AVALON
Windowing system distributor 'Microsoft Corp.', version 10.0.19045
System Description: Microsoft Windows 10 Pro (v10.0.2009.19045.3324)

Configured using:
 'configure --with-modules --without-dbus --with-native-compilation=aot
 --without-compress-install --with-tree-sitter CFLAGS=-O2'

Configured features:
ACL GIF GMP GNUTLS HARFBUZZ JPEG JSON LCMS2 LIBXML2 MODULES NATIVE_COMP
NOTIFY W32NOTIFY PDUMPER PNG RSVG SOUND SQLITE3 THREADS TIFF
TOOLKIT_SCROLL_BARS TREE_SITTER WEBP XPM ZLIB

(NATIVE_COMP present but libgccjit not available)

Important settings:
  value of $LANG: JPN
  locale-coding-system: cp932

Major mode: Lisp Interaction

Minor modes in effect:
  tooltip-mode: t
  global-eldoc-mode: t
  eldoc-mode: t
  show-paren-mode: t
  electric-indent-mode: t
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  tool-bar-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  line-number-mode: t
  indent-tabs-mode: t
  transient-mark-mode: t
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  auto-encryption-mode: t
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Load-path shadows:
None found.

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Memory information:
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bug#65187: 29.1; right edge of wide image can not be displayed in image-mode

[Eli Zaretskii]

> From: awrhygty@outlook.com
> Date: Thu, 10 Aug 2023 09:00:55 +0900
> 
> 
> Evaluate the following sexp and type C-e to display the right side of
> the image.

The snippet you posted signaled an error:

  Debugger entered--Lisp error: (error "Defining as dynamic an already lexical var" image-auto-resize)
    internal--define-uninitialized-variable(image-auto-resize "Non-nil to resize the image upon first display.\nIt...")
    custom-declare-variable(image-auto-resize (funcall #'#f(compiled-function () #<bytecode 0x49800016a1c14>)) "Non-nil to resize the image upon first display.\nIt..." :type (choice (const :tag "No resizing" nil) (const :tag "Fit to window" fit-window) (other :tag "Scale down to fit window" t) (number :tag "Scale factor" 1)) :version "29.1" :group image)
    byte-code("\300\301\302\303\304DD\305\306\307\310\311\312\313&\11\210\300\314\302\303\315DD\316\306\317\310\311\312\313&\11\210\300\320\302\303\321DD\322\306\323\310\324\312\313&\11..." [custom-declare-variable image-auto-resize funcall function #f(compiled-function () #<bytecode 0x49800016a1c14>) "Non-nil to resize the image upon first display.\nIt..." :type (choice (const :tag "No resizing" nil) (const :tag "Fit to window" fit-window) (other :tag "Scale down to fit window" t) (number :tag "Scale factor" 1)) :version "29.1" :group image image-auto-resize-max-scale-percent #f(compiled-function () #<bytecode 0x49800016ae914>) "Max size (in percent) to scale up to when `image-a..." (choice (const :tag "No max" nil) natnum) image-auto-resize-on-window-resize #f(compiled-function () #<bytecode 0x49800016ae854>) "Non-nil to resize the image whenever the window's ..." (choice (const :tag "No auto-resize on window size change" nil) (integer :tag "Wait for number of seconds before resize" 1)) "27.1"] 10)
    (image-mode)
    (let ((image-auto-resize nil)) (image-mode))
    (let* ((w (+ (window-pixel-width) 100)) (h 100) (stroke-width 4) (rect-w (- w stroke-width)) (rect-h (- h stroke-width)) (rect-x (/ stroke-width 2)) (rect-y (/ stroke-width 2)) (svg (format "<svg width=\"%d\" height=\"%d\">\n<rect width=\"%d\" heig..." w h rect-w rect-h rect-x rect-y stroke-width))) (switch-to-buffer (generate-new-buffer "tmpsvg")) (insert svg) (let ((image-auto-resize nil)) (image-mode)))
    (progn (let* ((w (+ (window-pixel-width) 100)) (h 100) (stroke-width 4) (rect-w (- w stroke-width)) (rect-h (- h stroke-width)) (rect-x (/ stroke-width 2)) (rect-y (/ stroke-width 2)) (svg (format "<svg width=\"%d\" height=\"%d\">\n<rect width=\"%d\" heig..." w h rect-w rect-h rect-x rect-y stroke-width))) (switch-to-buffer (generate-new-buffer "tmpsvg")) (insert svg) (let ((image-auto-resize nil)) (image-mode))))
    eval((progn (let* ((w (+ (window-pixel-width) 100)) (h 100) (stroke-width 4) (rect-w (- w stroke-width)) (rect-h (- h stroke-width)) (rect-x (/ stroke-width 2)) (rect-y (/ stroke-width 2)) (svg (format "<svg width=\"%d\" height=\"%d\">\n<rect width=\"%d\" heig..." w h rect-w rect-h rect-x rect-y stroke-width))) (switch-to-buffer (generate-new-buffer "tmpsvg")) (insert svg) (let ((image-auto-resize nil)) (image-mode)))) t)
    elisp--eval-last-sexp(nil)
    eval-last-sexp(nil)
    funcall-interactively(eval-last-sexp nil)
    call-interactively(eval-last-sexp nil nil)
    command-execute(eval-last-sexp)

I needed to change the recipe like below to be able to run it:

  (let* ((w (+ (window-pixel-width) 100))
	 (h 100)
	 (stroke-width 4)
	 (rect-w (- w stroke-width))
	 (rect-h (- h stroke-width))
	 (rect-x (/ stroke-width 2))
	 (rect-y (/ stroke-width 2))
	 (svg (format "\
  <svg width=\"%d\" height=\"%d\">
  <rect width=\"%d\" height=\"%d\" x=\"%d\" y=\"%d\"\
   fill=\"blue\" stroke=\"red\" stroke-width=\"%d\"/>
  </svg>\
  " w h rect-w rect-h rect-x rect-y stroke-width)))
    (switch-to-buffer (generate-new-buffer "tmpsvg"))
    (insert svg)
    (setopt image-auto-resize nil)  ; <<<<<<<<<<<<<<<<<<<<<<
    (image-mode))

> The vertical red line on the right edge should be displayed.
> But it is not displayed.

When I execute the modified version of the recipe, C-e does display
the red line on the right edge of the image.  So I cannot reproduce
the problem.

bug#65187: 29.1; right edge of wide image can not be displayed in image-mode

[Michael Heerdegen]

Eli Zaretskii <eliz@gnu.org> writes:

>     (setopt image-auto-resize nil)  ; <<<<<<<<<<<<<<<<<<<<<<
>     (image-mode))

Yes, or add a `defvar' call.

> When I execute the modified version of the recipe, C-e does display
> the red line on the right edge of the image.  So I cannot reproduce
> the problem.

I think I can help: this seems to depend on the toolkit.  When I
"./configure --with-x-toolkit=no" and build I see the right red line
like you.

But with "./configure" and rebuilding I do not see it (i.e. I can
reproduce the recipe).

This is on Gnu/Linux.

Michael.

bug#65187: 29.1; right edge of wide image can not be displayed in image-mode

[Eli Zaretskii]

> From: Michael Heerdegen <michael_heerdegen@web.de>
> Cc: awrhygty@outlook.com,  65187@debbugs.gnu.org
> Date: Fri, 11 Aug 2023 02:23:03 +0200
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> >     (setopt image-auto-resize nil)  ; <<<<<<<<<<<<<<<<<<<<<<
> >     (image-mode))
> 
> Yes, or add a `defvar' call.
> 
> > When I execute the modified version of the recipe, C-e does display
> > the red line on the right edge of the image.  So I cannot reproduce
> > the problem.
> 
> I think I can help: this seems to depend on the toolkit.  When I
> "./configure --with-x-toolkit=no" and build I see the right red line
> like you.
> 
> But with "./configure" and rebuilding I do not see it (i.e. I can
> reproduce the recipe).
> 
> This is on Gnu/Linux.

The OP is on MS-Windows, and there's just one "toolkit" there: the one
I'm using here in my MS-Windows builds.

But maybe there's some fine dependency on the frame geometry here; I
will take a closer look.  What bothers me is that the original recipe
signals an error, so I'm unsure what kind of code the OP ran to see
the problem to begin with.

bug#65187: 29.1; right edge of wide image can not be displayed in image-mode

[Michael Heerdegen]

Eli Zaretskii <eliz@gnu.org> writes:

> But maybe there's some fine dependency on the frame geometry here; I
> will take a closer look.

The frame width differs by one or two pixels for the different toolkit
builds here.  Something like that seems not unlikely.

> What bothers me is that the original recipe signals an error, so I'm
> unsure what kind of code the OP ran to see the problem to begin with.

Maybe just with `image-mode' already loaded.  Or sent the wrong recipe
version by accident.  Maybe the OP can tell us.

Michael.

bug#65187: 29.1; right edge of wide image can not be displayed in image-mode

[Eli Zaretskii]

> Cc: 65187@debbugs.gnu.org, awrhygty@outlook.com
> Date: Fri, 11 Aug 2023 09:15:46 +0300
> From: Eli Zaretskii <eliz@gnu.org>
> 
> But maybe there's some fine dependency on the frame geometry here; I
> will take a closer look.  What bothers me is that the original recipe
> signals an error, so I'm unsure what kind of code the OP ran to see
> the problem to begin with.

OK, I see the behavior described in the OP now.

But I don't understand why is this behavior interpreted as a bug.  If
I type <RIGHT> arrow or C-f enough times, I eventually do see the red
line on the right edge of the rectangle.  So this is just the normal
horizontal scrolling of images plus automatic clipping of images in
action.

I see no bug here.  What am I missing?

bug#65187: 29.1; right edge of wide image can not be displayed in image-mode

[Michael Heerdegen]

Eli Zaretskii <eliz@gnu.org> writes:

> I see no bug here.  What am I missing?

I don't know, I only wanted to help to reproduce the recipe.

Though, C-h k C-e says "Scroll horizontally to the right edge of the
image in the current window.".  That suggests to me that the
right edge would be made visible.

Michael.

bug#65187: 29.1; right edge of wide image can not be displayed in image-mode

[Eli Zaretskii]

> From: Michael Heerdegen <michael_heerdegen@web.de>
> Cc: 65187@debbugs.gnu.org,  awrhygty@outlook.com
> Date: Mon, 14 Aug 2023 02:37:01 +0200
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> > I see no bug here.  What am I missing?
> 
> I don't know, I only wanted to help to reproduce the recipe.
> 
> Though, C-h k C-e says "Scroll horizontally to the right edge of the
> image in the current window.".  That suggests to me that the
> right edge would be made visible.

It _is_ made visible, but if the portion of the image that exceeds the
window's width is small enough, the result is that the few extra
pixels are clipped, but from the display engine's POV we are "at the
right edge".  IOW, the horizontal scrolling in Emacs works on the
column granularity, not on pixel granularity.

This is not a bug, so I'm closing it.

bug#65187: 29.1; right edge of wide image can not be displayed in image-mode

[Michael Heerdegen]

Eli Zaretskii <eliz@gnu.org> writes:

> It _is_ made visible, but if the portion of the image that exceeds the
> window's width is small enough, the result is that the few extra
> pixels are clipped, but from the display engine's POV we are "at the
> right edge".  IOW, the horizontal scrolling in Emacs works on the
> column granularity, not on pixel granularity.

Would it make sense to scroll one column further then?  This could be
the more convenient behavior (most users know C-e better than how to
scroll horizontally, and it might be necessary to scroll further to
really see the right edge to check whether the image has a border or
something like that) and IMO would also fit the docstring a bit better.

Michael.

bug#65187: 29.1; right edge of wide image can not be displayed in image-mode

[awrhygty]

Eli Zaretskii <eliz@gnu.org> writes:

>> Cc: 65187@debbugs.gnu.org, awrhygty@outlook.com
>> Date: Fri, 11 Aug 2023 09:15:46 +0300
>> From: Eli Zaretskii <eliz@gnu.org>
>> 
>> But maybe there's some fine dependency on the frame geometry here; I
>> will take a closer look.  What bothers me is that the original recipe
>> signals an error, so I'm unsure what kind of code the OP ran to see
>> the problem to begin with.
>
> OK, I see the behavior described in the OP now.
>
> But I don't understand why is this behavior interpreted as a bug.  If
> I type <RIGHT> arrow or C-f enough times, I eventually do see the red
> line on the right edge of the rectangle.  So this is just the normal
> horizontal scrolling of images plus automatic clipping of images in
> action.
>
> I see no bug here.  What am I missing?

I can not view the right red line with typing many 'C-f's or 'C-e C-f'.

bug#65187: 29.1; right edge of wide image can not be displayed in image-mode

[Eli Zaretskii]

> From: awrhygty@outlook.com
> Cc: michael_heerdegen@web.de,  65187@debbugs.gnu.org
> Date: Tue, 15 Aug 2023 12:54:57 +0900
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> >> Cc: 65187@debbugs.gnu.org, awrhygty@outlook.com
> >> Date: Fri, 11 Aug 2023 09:15:46 +0300
> >> From: Eli Zaretskii <eliz@gnu.org>
> >> 
> >> But maybe there's some fine dependency on the frame geometry here; I
> >> will take a closer look.  What bothers me is that the original recipe
> >> signals an error, so I'm unsure what kind of code the OP ran to see
> >> the problem to begin with.
> >
> > OK, I see the behavior described in the OP now.
> >
> > But I don't understand why is this behavior interpreted as a bug.  If
> > I type <RIGHT> arrow or C-f enough times, I eventually do see the red
> > line on the right edge of the rectangle.  So this is just the normal
> > horizontal scrolling of images plus automatic clipping of images in
> > action.
> >
> > I see no bug here.  What am I missing?
> 
> I can not view the right red line with typing many 'C-f's or 'C-e C-f'.

You can enlarge the window's width instead, if you must see the last
few pixels.

bug#65187: 29.1; right edge of wide image can not be displayed in image-mode

[awrhygty]

Eli Zaretskii <eliz@gnu.org> writes:

>> From: awrhygty@outlook.com
>> Cc: michael_heerdegen@web.de,  65187@debbugs.gnu.org
>> Date: Tue, 15 Aug 2023 12:54:57 +0900
>> 
>> Eli Zaretskii <eliz@gnu.org> writes:
>> 
>> >> Cc: 65187@debbugs.gnu.org, awrhygty@outlook.com
>> >> Date: Fri, 11 Aug 2023 09:15:46 +0300
>> >> From: Eli Zaretskii <eliz@gnu.org>
>> >> 
>> >> But maybe there's some fine dependency on the frame geometry here; I
>> >> will take a closer look.  What bothers me is that the original recipe
>> >> signals an error, so I'm unsure what kind of code the OP ran to see
>> >> the problem to begin with.
>> >
>> > OK, I see the behavior described in the OP now.
>> >
>> > But I don't understand why is this behavior interpreted as a bug.  If
>> > I type <RIGHT> arrow or C-f enough times, I eventually do see the red
>> > line on the right edge of the rectangle.  So this is just the normal
>> > horizontal scrolling of images plus automatic clipping of images in
>> > action.
>> >
>> > I see no bug here.  What am I missing?
>> 
>> I can not view the right red line with typing many 'C-f's or 'C-e C-f'.
>
> You can enlarge the window's width instead, if you must see the last
> few pixels.

I can not if the image is much larger than display.

bug#65187: 29.1; right edge of wide image can not be displayed in image-mode

[Eli Zaretskii]

> From: awrhygty@outlook.com
> Cc: michael_heerdegen@web.de,  65187@debbugs.gnu.org
> Date: Tue, 15 Aug 2023 22:03:53 +0900
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> >> From: awrhygty@outlook.com
> >> Cc: michael_heerdegen@web.de,  65187@debbugs.gnu.org
> >> Date: Tue, 15 Aug 2023 12:54:57 +0900
> >> 
> >> Eli Zaretskii <eliz@gnu.org> writes:
> >> 
> >> >> Cc: 65187@debbugs.gnu.org, awrhygty@outlook.com
> >> >> Date: Fri, 11 Aug 2023 09:15:46 +0300
> >> >> From: Eli Zaretskii <eliz@gnu.org>
> >> >> 
> >> >> But maybe there's some fine dependency on the frame geometry here; I
> >> >> will take a closer look.  What bothers me is that the original recipe
> >> >> signals an error, so I'm unsure what kind of code the OP ran to see
> >> >> the problem to begin with.
> >> >
> >> > OK, I see the behavior described in the OP now.
> >> >
> >> > But I don't understand why is this behavior interpreted as a bug.  If
> >> > I type <RIGHT> arrow or C-f enough times, I eventually do see the red
> >> > line on the right edge of the rectangle.  So this is just the normal
> >> > horizontal scrolling of images plus automatic clipping of images in
> >> > action.
> >> >
> >> > I see no bug here.  What am I missing?
> >> 
> >> I can not view the right red line with typing many 'C-f's or 'C-e C-f'.
> >
> > You can enlarge the window's width instead, if you must see the last
> > few pixels.
> 
> I can not if the image is much larger than display.

As I said, that's how the display works with images, always have.

bug#65187: 29.1; right edge of wide image can not be displayed in image-mode

[awrhygty]

Eli Zaretskii <eliz@gnu.org> writes:

>> From: awrhygty@outlook.com
>> Cc: michael_heerdegen@web.de,  65187@debbugs.gnu.org
>> Date: Tue, 15 Aug 2023 22:03:53 +0900
>> 
>> Eli Zaretskii <eliz@gnu.org> writes:
>> 
>> >> From: awrhygty@outlook.com
>> >> Cc: michael_heerdegen@web.de,  65187@debbugs.gnu.org
>> >> Date: Tue, 15 Aug 2023 12:54:57 +0900
>> >> 
>> >> Eli Zaretskii <eliz@gnu.org> writes:
>> >> 
>> >> >> Cc: 65187@debbugs.gnu.org, awrhygty@outlook.com
>> >> >> Date: Fri, 11 Aug 2023 09:15:46 +0300
>> >> >> From: Eli Zaretskii <eliz@gnu.org>
>> >> >> 
>> >> >> But maybe there's some fine dependency on the frame geometry here; I
>> >> >> will take a closer look.  What bothers me is that the original recipe
>> >> >> signals an error, so I'm unsure what kind of code the OP ran to see
>> >> >> the problem to begin with.
>> >> >
>> >> > OK, I see the behavior described in the OP now.
>> >> >
>> >> > But I don't understand why is this behavior interpreted as a bug.  If
>> >> > I type <RIGHT> arrow or C-f enough times, I eventually do see the red
>> >> > line on the right edge of the rectangle.  So this is just the normal
>> >> > horizontal scrolling of images plus automatic clipping of images in
>> >> > action.
>> >> >
>> >> > I see no bug here.  What am I missing?
>> >> 
>> >> I can not view the right red line with typing many 'C-f's or 'C-e C-f'.
>> >
>> > You can enlarge the window's width instead, if you must see the last
>> > few pixels.
>> 
>> I can not if the image is much larger than display.
>
> As I said, that's how the display works with images, always have.

I mean physical display, in other words, full screen.

bug#65187: 29.1; right edge of wide image can not be displayed in image-mode

[Eli Zaretskii]

> From: awrhygty@outlook.com
> Cc: michael_heerdegen@web.de,  65187@debbugs.gnu.org
> Date: Tue, 15 Aug 2023 23:27:40 +0900
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> >> From: awrhygty@outlook.com
> >> Cc: michael_heerdegen@web.de,  65187@debbugs.gnu.org
> >> Date: Tue, 15 Aug 2023 22:03:53 +0900
> >> 
> >> Eli Zaretskii <eliz@gnu.org> writes:
> >> 
> >> >> From: awrhygty@outlook.com
> >> >> Cc: michael_heerdegen@web.de,  65187@debbugs.gnu.org
> >> >> Date: Tue, 15 Aug 2023 12:54:57 +0900
> >> >> 
> >> >> Eli Zaretskii <eliz@gnu.org> writes:
> >> >> 
> >> >> >> Cc: 65187@debbugs.gnu.org, awrhygty@outlook.com
> >> >> >> Date: Fri, 11 Aug 2023 09:15:46 +0300
> >> >> >> From: Eli Zaretskii <eliz@gnu.org>
> >> >> >> 
> >> >> >> But maybe there's some fine dependency on the frame geometry here; I
> >> >> >> will take a closer look.  What bothers me is that the original recipe
> >> >> >> signals an error, so I'm unsure what kind of code the OP ran to see
> >> >> >> the problem to begin with.
> >> >> >
> >> >> > OK, I see the behavior described in the OP now.
> >> >> >
> >> >> > But I don't understand why is this behavior interpreted as a bug.  If
> >> >> > I type <RIGHT> arrow or C-f enough times, I eventually do see the red
> >> >> > line on the right edge of the rectangle.  So this is just the normal
> >> >> > horizontal scrolling of images plus automatic clipping of images in
> >> >> > action.
> >> >> >
> >> >> > I see no bug here.  What am I missing?
> >> >> 
> >> >> I can not view the right red line with typing many 'C-f's or 'C-e C-f'.
> >> >
> >> > You can enlarge the window's width instead, if you must see the last
> >> > few pixels.
> >> 
> >> I can not if the image is much larger than display.
> >
> > As I said, that's how the display works with images, always have.
> 
> I mean physical display, in other words, full screen.

Yes, I understood.

bug#65187: 29.1; right edge of wide image can not be displayed in image-mode

[Eli Zaretskii]

> From: Michael Heerdegen <michael_heerdegen@web.de>
> Cc: 65187-done@debbugs.gnu.org,  awrhygty@outlook.com
> Date: Tue, 15 Aug 2023 01:58:12 +0200
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> > It _is_ made visible, but if the portion of the image that exceeds the
> > window's width is small enough, the result is that the few extra
> > pixels are clipped, but from the display engine's POV we are "at the
> > right edge".  IOW, the horizontal scrolling in Emacs works on the
> > column granularity, not on pixel granularity.
> 
> Would it make sense to scroll one column further then?

That wouldn't help in this case.  Here, we already have just one
column, it just is a very wide column.

Once again, this is something very inherent in how we display images
that exceed the window edge, and changing that is not possible by some
simple tricks.  Sorry.

bug#65187: 29.1; right edge of wide image can not be displayed in image-mode

[Eli Zaretskii]

> From: awrhygty@outlook.com
> Cc: michael_heerdegen@web.de,  65187@debbugs.gnu.org
> Date: Tue, 15 Aug 2023 12:54:57 +0900
> 
> I can not view the right red line with typing many 'C-f's or 'C-e C-f'.

Btw: this I cannot reproduce no matter how hard I try.  Enough C-f's
eventually bring the right red border into view.

Are you sure you cannot see it, no matter how many times you type C-f?
Whazt happens with window-hscroll when you type more and more C-f's?
doesn't it grow all the time?

C-f in this case should run the command image-set-window-hscroll, so
make sure this is what happens in your case.

bug#65187: 29.1; right edge of wide image can not be displayed in image-mode

[awrhygty]

Eli Zaretskii <eliz@gnu.org> writes:

>> From: awrhygty@outlook.com
>> Cc: michael_heerdegen@web.de,  65187@debbugs.gnu.org
>> Date: Tue, 15 Aug 2023 12:54:57 +0900
>> 
>> I can not view the right red line with typing many 'C-f's or 'C-e C-f'.
>
> Btw: this I cannot reproduce no matter how hard I try.  Enough C-f's
> eventually bring the right red border into view.
>
> Are you sure you cannot see it, no matter how many times you type C-f?
> Whazt happens with window-hscroll when you type more and more C-f's?
> doesn't it grow all the time?
>
> C-f in this case should run the command image-set-window-hscroll, so
> make sure this is what happens in your case.

I am using Windows PC with settings:
  system->display->scaling and layout->125%

Changing the value to 100% and testing with a new instance of emacs,
I can view the right red line with typing 'C-e'.
Typing many 'C-f's works, too.

bug#65187: 29.1; right edge of wide image can not be displayed in image-mode

[Eli Zaretskii]

> From: awrhygty@outlook.com
> Cc: michael_heerdegen@web.de,  65187@debbugs.gnu.org
> Date: Wed, 16 Aug 2023 12:26:41 +0900
> 
> I am using Windows PC with settings:
>   system->display->scaling and layout->125%
> 
> Changing the value to 100% and testing with a new instance of emacs,
> I can view the right red line with typing 'C-e'.
> Typing many 'C-f's works, too.

Thanks, I hope I've fixed this now on the emacs-29 branch.

bug#65187: 29.1; right edge of wide image can not be displayed in image-mode

[Eli Zaretskii]

> Cc: michael_heerdegen@web.de, 65187@debbugs.gnu.org
> Date: Wed, 16 Aug 2023 20:43:39 +0300
> From: Eli Zaretskii <eliz@gnu.org>
> 
> > From: awrhygty@outlook.com
> > Cc: michael_heerdegen@web.de,  65187@debbugs.gnu.org
> > Date: Wed, 16 Aug 2023 12:26:41 +0900
> > 
> > I am using Windows PC with settings:
> >   system->display->scaling and layout->125%
> > 
> > Changing the value to 100% and testing with a new instance of emacs,
> > I can view the right red line with typing 'C-e'.
> > Typing many 'C-f's works, too.
> 
> Thanks, I hope I've fixed this now on the emacs-29 branch.

No further comments, so I presume the bug is indeed fixed, and I'm now
closing it.