[Dri-devel] r128 worklog 20000627

[Gareth H. <ga...@va...>]

Complete:

* Almost all missing functionality (fog, color masks etc)
implemented/verified.  Scissors are coming with my current work, but
this is the last of it.  I played around with the hardware scissors a
bit and I think I've worked out a way to use them all the time.  The
SC_TOP_LEFT and SC_BOTTOM_RIGHT registers need to be saved and restored
on X server/DRI client switch, but if this is done there should be no
problems.

* LOD bias now supported (as much as possible).

* Lazy state management, the first step in moving state management into
the kernel.  Quake3 Fastest scores: original=60 KW=66 GTH=75 latest=78
and getting faster.

* Cleaner state upload mechanism, perhaps the second step in moving
state into kernel.  Context is uploaded as a 12-dword block each time,
reducing both computational and register writing overhead.  Other state
uploaded as needed (tex0, tex1, window etc) in the same way.  Context
programming can now be ripped out and plugged directly into the kernel
module.

* General cleanup of texture state management, removal of a lot of
redundancy in new state calculations.  Texture objects now maintain all
of their state, so there is no more prim/sec texture state with the
context.

In the next couple of hours I'll whip up a small patch that contains the
PCI card and fog fixes for XFree86 4.0.1 as I'd like to get this in but
the rest of the changes are too significant to make it in before the
release deadline.  These two things certainly count as bug fixes,
whereas the rest of my work is new stuff.

I'll be plugging the elt path code in later tonight.  It's been done for
ages now.

Kernel optimizations after that.

-- Gareth