So: if we need the q coord in the end (solely determined by the texture
target, i.e. 2d / 1d / texrect targets) we swap the third and 4th row.
Additionally, if we don't have texgen but 4 tex coords submitted, we swap
So: if we need the q coord in the end (solely determined by the texture
target, i.e. 2d / 1d / texrect targets) we swap the third and 4th row.
Additionally, if we don't have texgen but 4 tex coords submitted, we swap