MTX1 fourcc pixel format?

[gpp]

Hi,
Playing around with ddtest.exe on a
marvel g200, I note there is support
for two different FOURCC pixel formats.
YUY2 and MTX1. At least these two show
up when you try to create a surface and
specify that you want to use a FORUCC
spec for the pixel format.

YUY2 is a well know format. MTX1 I have not
seen before, and I am unable to find it in
any of the registries.

Can anyone help me out with the spec for
this pixel format?

Thanks,

Geir Pedersen
geirp@newlearning.no