D29131: [scene] Generate window quads for sub-surfaces

zzag added inline comments.

INLINE COMMENTS

> apol wrote in scene.cpp:1035
> How about
> 
>   for (const QRectF &rect : region) {
>     const QRect positioned = rect.translated(position);
>     const QRect scaled = rect * scale;
>   
>     quad[0] = WindowVertex(positioned.topLeft(), scaled.topLeft());
>     quad[1] = WindowVertex(positioned.topRight(), scaled.topRight());
>     quad[2] = WindowVertex(positioned.bottomRight(), scaled.bottomRight());
>     quad[3] = WindowVertex(positioned.bottomLeft(), scaled.bottomLeft());
>   
>     quads << quad;
>   }

Can't do `rect * scale` because it rounds numbers.

REPOSITORY
  R108 KWin

REVISION DETAIL
  https://phabricator.kde.org/D29131

To: zzag, #kwin
Cc: apol, ngraham, kwin, Orage, cacarry, LeGast00n, The-Feren-OS-Dev, cblack, jraleigh, zachus, fbampaloukas, mkulinski, ragreen, jackyalcine, iodelay, crozbo, bwowk, ZrenBot, alexeymin, himcesjf, lesliezhai, ali-mohamed, hardening, romangg, jensreuterberg, abetts, sebas, ahiemstra, mart