[Users] [Bug 3119] add plugin to display QR-Code for avatar

[noreply at thewildbeast.co.uk]

http://www.thewildbeast.co.uk/claws-mail/bugzilla/show_bug.cgi?id=3119

--- Comment #14 from Christian Hesse <mail at earthworm.de> ---
(In reply to comment #13)
> (In reply to comment #11)
> > * (Move Face and X-Face code to a separate plugin. Does it make sens to
> > remove dependency of compface from main Claws?)
> 
> This is an old time core-feature, would break all configured Claws Mail
> out there for no benefit.

Sounds reasonable. Agreed.

> > * Add a configuration option to select the priority of plugins. I Would like
> > to have libravatar -> Face -> X-Face -> QR-Code in most cases. 
> 
> You can already have that with the separate plugin way :)

Hmm, really?
If I load the libravatar plugin this is preferred, (X-)Face is shown if no
libravatar can be retrieved.
Loading my QR-Code plugin I always get the QR-Code, not only as a fallback. Can
I configure that?
Or can I prefer (X-)Face if available, then check for libravatar?

> > * (Allow avatar in size different than 48x48 pixel, so libravatar can be
> > bigger and QR-Code is not blurry.)
> 
> Current codes are already readable, anyway, if it's blurry it's because it's
> being zoomed in, isn't it? 

Yes, I always scale up (or down) to 48x48 pixel.

> Maybe it's just the size of the generated QR what needs to be adjusted to be
> rendered with a exact number of pixels per QR-point ;)

Then the code gets even smaller... And we have to make sure it is not truncated
for long mail addresses that result in a code larger than 48x48 pixel.

This is not a must-have but a nice-to-have. So as long as avatar size is 48x48
pixel I would always scale it.
Best readability on display is with a fixed scale of two or three. (e.g. a
21x21 Qr-Code would result in 42x42 or 63x63 pixel.)

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