Re: Image transformation filter for upscaled images

[Stefan Kangas]

Evgeny Zajcev <lg.zevlg@gmail.com> writes:

>> The reason nearest was chosen was because scaled up pixel art (emojis,
>> mostly, like etc/images/smilies/wry.xpm) looked abominable

Doesn't it seem like a bad trade-off to improve rendering of smileys at
the cost of rendering PDF:s worse?  I rarely if ever use doc-view, but
testing it now seems to produce less than stellar results (i.e. the text
is barely readable).

> Just get rid of any xpm :) Emacs has nice support for SVG after all, we can
> write xpm to svg converter to keep pixel art precision.

Is there a way to convert from XPM automatically, or are you saying you
volunteer to make the SVG:s?

Another option would perhaps be to just replace the XPM:s we have with
some set of emojis licensed under Creative Commons.  The first one I
found when searching online was this one:

    https://openmoji.org/
    https://github.com/hfg-gmuend/openmoji/blob/master/FAQ.md

Its license is Creative Commons Share Alike License 4.0 (CC BY-SA 4.0).
That is okay for distributing with Emacs, I think?

Or we could use some other set, I don't exactly care which one it is.
If there is more than one candidate perhaps we could distribute more
than one and add an option to choose between them.