gallium: rework CSO-related code in state tracker

Use the code in cso_context.c rather than st_cache.c.
Basically, binding of state objects now goes through the CSO module.
But Vertex/fragment shaders go through pipe->bind_fs/vs_state() since they're
not cached by the CSO module at this time.

Also, update softpipe driver to handle NULL state objects in various places.
This happens during context destruction.  May need to update other drivers...

1 files changed, 3 insertions, 2 deletions

diff --git a/src/mesa/state_tracker/st_mesa_to_tgsi.c b/src/mesa/state_tracker/st_mesa_to_tgsi.c
index 97206752af..9446b012ad 100644
--- a/src/mesa/state_tracker/st_mesa_to_tgsi.c
+++ b/src/mesa/state_tracker/st_mesa_to_tgsi.c
@@ -683,8 +683,9 @@ find_temporaries(const struct gl_program *program,
  * \param tokens  array to store translated tokens in
  * \param maxTokens  size of the tokens array
  *
+ * \return number of tokens placed in 'tokens' buffer, or zero if error
  */
-GLboolean
+GLuint
 tgsi_translate_mesa_program(
    uint procType,
    const struct gl_program *program,
@@ -918,6 +919,6 @@ tgsi_translate_mesa_program(
          maxTokens - ti );
    }
 
-   return GL_TRUE;
+   return ti;
 }