Re: High-res Customize icons

[Yuan Fu]

> 
> The Mac port (not the NS port) has supported @2x images since 2012 at
> the C level as opposed to the Lisp level.  It also automatically
> re-renders images in resolution-independent formats such as SVG or PDF
> in reaction to the frame movement from a Retina display to a
> non-Retina one, for example.  You might want to look at the
> corresponding part of the Info document for the Mac port:
> 
> https://bitbucket.org/mituharu/emacs-mac/src/dfb5869abf8f6892e928042e9f8221f8435a0dcb/doc/emacs/macport.texi#lines-446
> 

This is very impressive. The NS port renders SVG in low resolution, but I don’t 
use SVG’s frequent enough to complain about it ;-) I wonder what’s the current 
behavior on changing resolution on a Linux display, and how should this image 
resolution thing work in general? Hopefully some expert in Linux xterm can 
chime in and provide some input.

Yuan