mesa/st: refactor vertex and fragment shader translation

Translate vertex shaders independently of fragment shaders.

Previously tried to make fragment shader semantic indexes always start
at zero and exclude holes.  This was unnecessary but meant that vertex
shader translation had to be adjusted to take this into account.

Now use a fixed scheme for labelling special FS input semantics
(color, etc), and another fixed scheme for the generics.

With this, vertex shaders can be translated independently of the bound
fragment shader, assuming mesa has done its own job and ensured that
the vertex shader provides at least the inputs the fragment shader is
looking for.  The state-tracker didn't attempt to do anything about
this previously, so it shouldn't be needed now.

1 files changed, 2 insertions, 1 deletions

diff --git a/src/mesa/state_tracker/st_atom.h b/src/mesa/state_tracker/st_atom.h
index c7cffd85c8..f34b49203b 100644
--- a/src/mesa/state_tracker/st_atom.h
+++ b/src/mesa/state_tracker/st_atom.h
@@ -47,7 +47,8 @@ void st_validate_state( struct st_context *st );
 extern const struct st_tracked_state st_update_framebuffer;
 extern const struct st_tracked_state st_update_clip;
 extern const struct st_tracked_state st_update_depth_stencil_alpha;
-extern const struct st_tracked_state st_update_shader;
+extern const struct st_tracked_state st_update_fp;
+extern const struct st_tracked_state st_update_vp;
 extern const struct st_tracked_state st_update_rasterizer;
 extern const struct st_tracked_state st_update_polygon_stipple;
 extern const struct st_tracked_state st_update_viewport;