GNU bug report logs -
#77774
stipples as fill-column indicator
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> From: Johann Höchtl <johann.hoechtl <at> gmail.com>
> Date: Sun, 13 Apr 2025 09:09:34 +0200
>
> I follow
> https://emacs.stackexchange.com/questions/81278/how-to-have-a-solid-fill-column-indicator-when-line-spacing-is-greater-than-zero
> to set stipples as fill-column-indicator
>
> The result is
>
> grafik.png
>
> I get this result on Windows using Emacs HEAD as well as on Linux using Emacs 30.1 pgtk-build (Arch repo)
>
> While the screenshot has display-line-numbers-mode enabled, it is not necessary to expose the IMHO bug.
>
> To reproduce:
>
> emacs -q --load fc.el fc.el
>
> fc.el attached.
>
> To my understanding according to
> https://www.gnu.org/software/emacs/manual/html_node/elisp/Face-Attributes.html:
>
> > Alternatively, the value can specify the bitmap directly, with a list of the form (width height data). Here,
> width and height specify the size in pixels, and data is a string containing the raw bits of the bitmap, row by
> row.
>
> so :stipple '(7 1 " ") has a bit mask of "0010 0000" and to my understanding should result in a single black
> horizontal line. Alas it produces two, which I consider a bug.
>
> This, however, is not consistent. On Linux, when I add more lines to the file so that display-line-numbers-mode
> would result in a shift of the 'viewport', sometimes only one line is displayed, as expected. On Windows the
> behaviour remains consistent is so far as always two lines are display
FWIW, I cannot reproduce the problem on MS-Windows: I get a single
vertical line, as you expect. It doesn't matter whether I turn
display-line-numbers-mode on or off, the result is consistent with
your expectations.
This bug report was last modified 57 days ago.
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