This is the documented correct ordering, and while the previous ordering
(reversed) worked on some hardware, it failed on others.
Reported by: Wang Zhenyu <zhenyu.z.wang@intel.com>
This fixes the rendercheck "transformed src/mask coords 2" tests. Previously,
the source pixels chosen would be off by one in some cases.
The particular values were taken from Mesa, which uses .125 offsets (except
apparently broken for y), but the signs are changed. I would be happier if
I had better justification for why this worked.
Eric Anholt