[Mesa-dev] gallium: blitters and scissors

[Dave Airlie]

I've noticed that none of the blitters use scissor state, and wondered
if there was a reason for this.

It looks like drivers are expected to setup scissor state in the
framebuffer setup and in the set scissor state, but with r600g due to
the underlying state tracking it can end up doing the wrong thing.

The 3 patches add CSO cache + u_blit + u_blitter scissor usage.

Just wondering if I'm violating some rules of the gallium interface or not.

Dave.
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