st/mesa: make Z/S drawpix shaders independent of variants, don't use Mesa IR v2

- there is no connection to user fragment shaders, so having these as
  shader variants makes no sense
- don't use Mesa IR, use TGSI
- don't create gl_fragment_program, just create the shader CSO

v2: generate exactly the same shader as before to fix llvmpipe

Reviewed-by: Dave Airlie <[email protected]>
Reviewed-by: Brian Paul <[email protected]>
Tested-by: Brian Paul <[email protected]>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/mesa/state_tracker/st_context.h b/src/mesa/state_tracker/st_context.h
index a4cda29059d..262581eceeb 100644
--- a/src/mesa/state_tracker/st_context.h
+++ b/src/mesa/state_tracker/st_context.h
@@ -184,7 +184,7 @@ struct st_context
 
    /** for glDraw/CopyPixels */
    struct {
-      struct gl_fragment_program *shaders[4];
+      void *zs_shaders[4];
       void *vert_shaders[2];   /**< ureg shaders */
    } drawpix;