Re: make a drawing with Emacs

[Tomas Hlavaty <tom@logand.com>]

On Thu 03 Sep 2020 at 09:14, <tomas@tuxteam.de> wrote:
> On Wed, Sep 02, 2020 at 11:10:29PM +0200, Tomas Hlavaty wrote:
>> >> That might be an emacs-nox thing, perhaps?
>> >
>> > Your Emacs has to be able to display svg images.
>> 
>> It is a shame that image code in emacs is completely dependent on unsafe
>> foreign libraries and tightly coupled with graphics toolkits.
>
> I think there is a misunderstanding. All the functions in 'svg
> basically do what you sketch in your mail (i.e. manipulate a dom
> as an abstract data structure with an XML representation: so
> basically generate and serialize XML) and don't rely on librsvg
> et al. (I guess that is what you chastise as "unsafe foreign
> library").

Not true.  For example svg-image does rely on librsvg.  There might be
other functions but I don't know that and there is no easy way to find
out except reading all that source code.

> How does the emacs framebuffer work? Can it display images as
> parts of a regular Emacs buffer?

Based on where the buffer is on the screen it calculates where to draw
the image on the Linux framebuffer.  Then it works like w3m web browser.