[Mesa-dev] [PATCH 0/2] Fix gl_ClipVertex support on pre-Gen6 i965

[Chris Forbes]

Adds proper support for gl_ClipVertex when clipping against user
clip planes.

Fixes broken rendering in Source games on at least ILK [Water in
CS:S video stress test is an easy example].

Also all clip-vertex piglits pass now.

This is a bit of a stopgap thing since I really want to add GLSL-1.30
support in the clip shader, but this fixes things we're already
claiming to support so it's a step forward.

-- Chris