Re: SVG hack for display engine

[Eli Zaretskii]

> From: Anand Tamariya <atamariya@gmail.com>
> Date: Tue, 16 Nov 2021 08:31:24 +0530
> Cc: Emacs Devel <emacs-devel@gnu.org>
> 
> Do you notice the popup in the top window in the image attached in OP? It has 
> clean lines over buffer
> content with mixed (fixed + variable pitch) fonts. Is it possible to have 
> that in graphical Emacs? Precise
> positioning of popups can open up graphical Emacs to immense possibilities 
> like feature filled tooltips, inline
> completion popup, multi-column layouts, watermarks etc.  

Why would it be impossible to implement something like that without
changing the current basic display code?  IOW, what does the SVG
enable, technically, that cannot be done with the current display and
prevents implementation of such popups?