[PATCH renderproto] Add floating point transforms

[Clemens Eisserer]

Hi Siarhei,


> * Who are the expected users of this new functionality and what are
>   the practical advantages for them? Preferably something measurable
>   and easy to confirm.
>
> * Are you expecting the existing applications/toolkits to eventually
>   switch from the 16.16 fixed point format to the single precision
>   floating point format? Or is it only intended to be used by a few
>   selected tools, such as xrandr?

At least I intend to use it for the Java2D xrender pipeline, therefore
almost all graphical java programs will benefit from this (and I guess
it won't take too long until it is exposed by Cairo too).

Br, Clemens