[Therion] Background zoom-level bug

[Wookey]

On 2018-11-12 21:22 +1300, Bruce Mutton via Therion wrote:
> On Monday, 12 November 2018 16:32 Wookey wrote:
> 
> > There seems to be a bug in xtherion graphics editor revealed if you manage to enter a non-power-of-two zoom level.
> >
> > If you get into this state then the background image and the lines drawn on top of it go out of registration.

> This bug has been around ever since mouse wheel zooming was introduced.  An attempt was made to fix it I recall, but it did not have the desired effect.
> It manifests for bitmap background images, but not for xvi 'images'.

Aha - this would explain why most of us had not noticed it before. People using a pockettopo->topparser->xtherion workflow would never notice this (no jpegs/gifs/pngs).

Wookey
-- 
Principal hats:  Linaro, Debian, Wookware, ARM
http://wookware.org/
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