From: Lars Magne Ingebrigtsen <larsi@gnus.org>
To: Eli Zaretskii <eliz@gnu.org>
Cc: emacs-devel@gnu.org
Subject: Re: Accessing rendered image data
Date: Tue, 28 Jun 2016 20:29:58 +0200 [thread overview]
Message-ID: <m3r3bh88ux.fsf@gnus.org> (raw)
In-Reply-To: <83k2h9w4wn.fsf@gnu.org> (Eli Zaretskii's message of "Tue, 28 Jun 2016 21:21:28 +0300")
Eli Zaretskii <eliz@gnu.org> writes:
> And you should trust me that I don't like wasting my time on digging
> into problems whose purpose I don't fully understand ;-)
As I said earlier in this thread, I wanted to figure out how much space
text rendered in an SVG takes. Since Emacs doesn't expose this data
back to Elisp land, I hit upon the idea of rendering the text in a
buffer instead (with the same fonts that would have been used in the
SVG).
This will give me approximate sizes that'll be good enough.
> How should I know? This stuff is not documented at all, so you are
> asking me to step in a debugger through gobs of unfamiliar and
> complicated code, without ever understanding what is it that I'm
> trying to accomplish. That's not in my job description.
>
> If you want my help, try telling more.
It is documented in
(info "(lisp)Low-Level Font")
In particular:
-- Function: font-spec &rest arguments
Return a new font spec using the specifications in ARGUMENTS,
which should come in `property'-`value' pairs. The possible
specifications are as follows:
`:name'
The font name (a string), in either XLFD, Fontconfig, or GTK
format. *Note Fonts: (emacs)Fonts.
[...]
`:size'
The font size--either a non-negative integer that specifies
the pixel size, or a floating-point number that specifies the
point size.
An XLFD would look like "futura:size=40".
(insert (propertize "FOO" 'face (list :font (find-font (font-spec :name "futura:size=40")))))
Does not work. Either this is a bug, or there are missing bits in the
manual that says what find-font and/or 'face wants here. Or there's
something else I'm missing.
--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog: http://lars.ingebrigtsen.no
next prev parent reply other threads:[~2016-06-28 18:29 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-28 13:52 Accessing rendered image data Lars Magne Ingebrigtsen
2016-06-28 15:37 ` Lars Magne Ingebrigtsen
2016-06-28 16:36 ` Eli Zaretskii
2016-06-28 16:46 ` Lars Magne Ingebrigtsen
2016-06-28 17:23 ` Eli Zaretskii
2016-06-28 17:37 ` Lars Magne Ingebrigtsen
2016-06-28 18:10 ` Eli Zaretskii
2016-06-28 18:15 ` Lars Magne Ingebrigtsen
2016-06-28 18:21 ` Eli Zaretskii
2016-06-28 18:29 ` Lars Magne Ingebrigtsen [this message]
2016-06-28 18:48 ` Eli Zaretskii
2016-06-28 18:58 ` Lars Magne Ingebrigtsen
2016-06-28 19:06 ` Lars Magne Ingebrigtsen
2016-06-28 19:38 ` Lars Magne Ingebrigtsen
2016-06-28 20:17 ` Lars Magne Ingebrigtsen
2016-06-28 20:26 ` Robert Weiner
2016-06-30 15:08 ` Eli Zaretskii
2016-06-30 15:12 ` Ted Zlatanov
2016-06-30 15:38 ` Lars Magne Ingebrigtsen
2016-06-30 16:11 ` Ted Zlatanov
2016-06-28 18:35 ` Lars Magne Ingebrigtsen
2016-06-28 18:51 ` Eli Zaretskii
2016-06-28 16:25 ` Eli Zaretskii
2016-06-28 16:30 ` Lars Magne Ingebrigtsen
2016-06-28 17:03 ` Eli Zaretskii
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