nv40: implement user clip planes

It turns out the user planes handed to the driver are already in clip space.
Hence, we no longer need to transform incoming vertices before computing the
clip distance, and no longer need to change the interface provided by
gallium.  Yay :)

The clip state change handling could be better, but this works.

1 files changed, 3 insertions, 0 deletions

diff --git a/src/gallium/drivers/nv40/nv40_state.h b/src/gallium/drivers/nv40/nv40_state.h
index e018464c9f..2b4225deb2 100644
--- a/src/gallium/drivers/nv40/nv40_state.h
+++ b/src/gallium/drivers/nv40/nv40_state.h
@@ -29,6 +29,9 @@ struct nv40_vertex_program {
 	struct draw_vertex_shader *draw;
 
 	boolean translated;
+
+	struct pipe_clip_state ucp;
+
 	struct nv40_vertex_program_exec *insns;
 	unsigned nr_insns;
 	struct nv40_vertex_program_data *consts;