i965g: handle special vs outputs specially

Where vs output semantic tags indicate an output is signficant for
fixed function processing (such as clipping, unfilled modes, etc),
retain information about that output so that we can get to it easily
later on.

Fix up the unfilled processing, but hard-wire edgeflag to one for now.

With this change, trivial/tri-unfilled works.

1 files changed, 34 insertions, 4 deletions

diff --git a/src/gallium/drivers/i965/brw_pipe_shader.c b/src/gallium/drivers/i965/brw_pipe_shader.c
index 7febf9e0c2..02bc8fa130 100644
--- a/src/gallium/drivers/i965/brw_pipe_shader.c
+++ b/src/gallium/drivers/i965/brw_pipe_shader.c
@@ -124,21 +124,51 @@ static void *brw_create_vs_state( struct pipe_context *pipe,
 				  const struct pipe_shader_state *shader )
 {
    struct brw_context *brw = brw_context(pipe);
+   struct brw_vertex_shader *vs;
+   unsigned i;
 
-   struct brw_vertex_shader *vs = CALLOC_STRUCT(brw_vertex_shader);
+   vs = CALLOC_STRUCT(brw_vertex_shader);
    if (vs == NULL)
       return NULL;
 
    /* Duplicate tokens, scan shader
     */
-   vs->id = brw->program_id++;
-   vs->has_flow_control = has_flow_control(&vs->info);
-
    vs->tokens = tgsi_dup_tokens(shader->tokens);
    if (vs->tokens == NULL)
       goto fail;
 
    tgsi_scan_shader(vs->tokens, &vs->info);
+
+   vs->id = brw->program_id++;
+   vs->has_flow_control = has_flow_control(&vs->info);
+
+   for (i = 0; i < vs->info.num_outputs; i++) {
+      int index = vs->info.output_semantic_index[i];
+      switch (vs->info.output_semantic_name[i]) {
+      case TGSI_SEMANTIC_POSITION:
+         vs->output_hpos = i;
+         break;
+      case TGSI_SEMANTIC_COLOR:
+         if (index == 0)
+            vs->output_color0 = i;
+         else
+            vs->output_color1 = i;
+         break;
+      case TGSI_SEMANTIC_BCOLOR:
+         if (index == 0)
+            vs->output_bfc0 = i;
+         else
+            vs->output_bfc1 = i;
+         break;
+#if 0
+      case TGSI_SEMANTIC_EDGEFLAG:
+         vs->output_edgeflag = i;
+         break;
+#endif
+      }
+   }
+
+
    
    /* Done:
     */