Translate mesa vertex/fragment programs to TGSI programs at same time to do proper linking.

Previously, programs were translated independently during validation.
The problem is the translation to TGSI format, which packs shader
input/outputs into continuous slots, depends on which vertex program is
being paired with which fragment shader.  Now, we look at the outputs
of the vertex program in conjunction with the inputs of the fragment shader
to be sure the attributes match up correctly.

The new 'linked_program_pair' class keeps track of the associations
between vertex and fragment shaders.  It's also the place where the TGSI
tokens are kept since they're no longer per-program state but per-linkage.

Still a few loose ends, like implementing some kind of hash/lookup table
for linked_program_pairs.

1 files changed, 4 insertions, 2 deletions

diff --git a/src/mesa/state_tracker/st_context.h b/src/mesa/state_tracker/st_context.h
index 3713328eb1..24f0ff9aaf 100644
--- a/src/mesa/state_tracker/st_context.h
+++ b/src/mesa/state_tracker/st_context.h
@@ -45,6 +45,8 @@ struct cso_blend;
 #define ST_NEW_MESA                    0x1 /* Mesa state has changed */
 #define ST_NEW_FRAGMENT_PROGRAM        0x2
 #define ST_NEW_VERTEX_PROGRAM          0x4
+#define ST_NEW_LINKAGE                 0x8
+
 
 struct st_state_flags {
    GLuint mesa;
@@ -119,8 +121,8 @@ struct st_context
 
    GLfloat polygon_offset_scale; /* ?? */
 
-   /** Mapping from VERT_ATTRIB_x to post-transformed vertex slot */
-   GLuint vertex_attrib_to_slot[VERT_RESULT_MAX];
+   /** Mapping from VERT_RESULT_x to post-transformed vertex slot */
+   const GLuint *vertex_result_to_slot;
 
    struct st_vertex_program *vp;    /**< Currently bound vertex program */
    struct st_fragment_program *fp;  /**< Currently bound fragment program */