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6360. By Alexander Wolf on 2014-07-13

sync with trunk

6359. By Alexander Wolf on 2014-02-02

sync with trunk

6358. By Guillaume Chereau on 2013-11-24

use power of two sized buffer for the font texture cache

We could check of the GPU supports NPOT texture, but in fact I think it does
not make much difference anyway, so it is easier to always assume that we don't
support NPOT textures.

6357. By Guillaume Chereau on 2013-11-20

minor change in font texture buffer size with a global scale

6356. By Guillaume Chereau on 2013-11-20

minor change: release font texture buffer when we are done with it

This does not seem to make any difference, but still better to do it I guess.

6355. By Guillaume Chereau on 2013-11-20

StelPainter: clear text texture cache at exit

6354. By Guillaume Chereau on 2013-11-20

use a QPixmap instead of a QImage in the text buffer creation

I am not sure why, but the result looks a bit different.

6353. By Guillaume Chereau on 2013-11-20

use a QOpenglTexture to cache the rendered texts

This fixes a bug on windows, where the text is sometime scrambled.

The text looks thiner than before, and this might not be a good thing, also it
does not work on hardware with only power of two textures yet.

6352. By Fabien Chéreau on 2013-11-17

Properly fixed refraction shaking bug. Double precision is unfortunately required.

6351. By Fabien Chéreau on 2013-11-15

Reduced planet shaking when zooming in with refraction