[PATCH renderproto] Add floating point transforms

[Keith Packard]

walter harms <wharms at bfs.de> writes:

> Would it make sense to use double for internal calculation ?
> Most systems provide 64bit (or more) fpu-registers these days.

In fact, pixman exposes only double matrices at this point, so the
server implementation stores both fixed point and floating point
variants in that format.

However, a GPU will likely want to stick with 32 bit values, which is
why I expressed the protocol using 32 bit floats; 64-bit computation in
the GPU is generally much slower than 32-bit.

-- 
keith.packard at intel.com
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