[Mesa3d-dev] Latest changes

[Keith W. <ke...@va...>]

I'll post a more detailed summary later, but I've committed changes with
fairly sweeping scope.  Fundamentally, core mesa is out of the fallback
business, this is now the job of the drivers and two helper modules 'swrast'
and 'swrast_setup'.  

Swrast is the old software rasterizer wrapped up behind an interface which
removes the need for the driver to care about which statechanges might affect
the rasterizer itself.

Swrast_setup is a layer above the software rasterizer which takes care of
unfilled, offset, two-side lit and flatshaded primitives.  It also provides a
RasterSetup phase for building SWvertices efficiently.

I've modified the FX, X11 and OSmesa drivers to this new regime, though at
this point I've done nothing to ensure performance has been maintained.

In the case of the FX driver, I've taken steps to simplify the codebase in
reflection of it's basically obsolete status.  To this end I've removed lots
of marginal or experimental code, and backported some of the appropriate bits
of a DRI style driver.  I propose that the focus of this driver be providing a
solid Glide2 driver, and that if anyone wants to focus on performance and/or
Glide3, they should backport the new tdfx-3-0-0-branch DRI driver, which
offers very good performance gains on the Glide2 codebase.

Keith