Flickering while mouseover the first time

[kaputtnik]

As described in https://wl.widelands.org/forum/topic/1830/

Some things flicker while hovering a mouse over one stock item the first time. Hovering a second time the flickering will disappear. This happens to each stock item until all items are hovered.

Some of flickering:
- The shadow of trees gets bright
- The fog of war disappear in a small area on the bottom left corner

This occurs also in the editor, mostly while de-/increase values f.e. in the height tool.

[Jens Beyer (qcumber-some)]

This is caused by commit 7566 (and this time, I made sure the numbers are correct ;-) )

[GunChleoc (gunchleoc)]

Thanks for tracking down the commit. I'll look into this.

[GunChleoc (gunchleoc)]

The flickering is caused by calls of fh1->render(). I have reduced it to a minimum in 7645 by prerendering the text labels. So, it now only happens once when you open the window for the first time.

[GunChleoc (gunchleoc)]

Fixed in build19-rc1.