glsl: Optionally lower TCS gl_PatchVerticesIn to a uniform.

i965 has no special hardware for this, so the best way to implement
this is to pass it in via a uniform.

Signed-off-by: Kenneth Graunke <[email protected]>
Reviewed-by: Alejandro Piñeiro <[email protected]>
Cc: [email protected]

1 files changed, 4 insertions, 0 deletions

diff --git a/src/mesa/program/prog_statevars.c b/src/mesa/program/prog_statevars.c
index 23e3015146f..8dddc0b86a9 100644
--- a/src/mesa/program/prog_statevars.c
+++ b/src/mesa/program/prog_statevars.c
@@ -598,6 +598,10 @@ _mesa_fetch_state(struct gl_context *ctx, const gl_state_index state[],
          }
          return;
 
+      case STATE_TCS_PATCH_VERTICES_IN:
+         val[0].i = ctx->TessCtrlProgram.patch_vertices;
+         return;
+
       case STATE_TES_PATCH_VERTICES_IN:
          if (ctx->TessCtrlProgram._Current)
             val[0].i = ctx->TessCtrlProgram._Current->VerticesOut;