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From: | dalanicolai |
Subject: | bug#54688: 29.0.50; Sliced image in margin looks bad |
Date: | Sun, 3 Apr 2022 13:04:55 +0200 |
(Once more using reply-all)Playing around with :ascent, makes possible to keep the line-pixel-height fixed.So in the following I simply use `insert-image`. Without the :ascent, the'line-pixel-height' increases when inserting another character. With the:ascent it is possible to reduce this 'increase'. For me the increase is 0when I use an ascent value of 80.(below the used code)(with-current-buffer (get-buffer-create "test")
(setq left-margin-width 5)
(insert-image (svg-image (let* ((ph (line-pixel-height))
(size ph)
(svg (svg-create size size)))
(svg-circle svg ph ph ph :fill "red")
svg)
:ascent 80))
(switch-to-buffer (current-buffer)))On Sun, 3 Apr 2022 at 12:54, Eli Zaretskii <eliz@gnu.org> wrote:> From: dalanicolai <dalanicolai@gmail.com>
> Date: Sun, 3 Apr 2022 12:33:01 +0200
> Cc: 54688@debbugs.gnu.org
>
> Thank you for the quick reply. However, the height of the image,
> (* 2 (line-pixel-height)), is equal to twice the `default-font-height`
> (the 'line-pixel-height' and 'default-font-height' are equal, here both
> 17).
>
> So before I add the character after the image, (line-pixel-height)
> returns 17. But when I insert a character after it (with
> 'default-font-height' is 17), the `line-pixel-height` increases to
> 22. So I am not sure how to not let the line height increase.
> I will try to play a little with the :ascent value.
Images can also have margins:
int
image_ascent (struct image *img, struct face *face, struct glyph_slice *slice)
{
int height;
int ascent;
if (slice->height == img->height)
height = img->height + img->vmargin;
else if (slice->y == 0)
height = slice->height + img->vmargin;
else
height = slice->height;
Maybe those make the difference?
In any case, once I add a character, the line height grows, which
tells us some vertical dimension somewhere is unaccounted for.
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