draw/tgsi: implement geom shader invocation support.

This is just for softpipe, llvmpipe won't work without
some changes.

Reviewed-by: Roland Scheidegger <[email protected]>
Signed-off-by: Dave Airlie <[email protected]>

2 files changed, 3 insertions, 0 deletions

diff --git a/src/gallium/auxiliary/tgsi/tgsi_scan.c b/src/gallium/auxiliary/tgsi/tgsi_scan.c
index 369f56a1955..711413cdaf6 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_scan.c
+++ b/src/gallium/auxiliary/tgsi/tgsi_scan.c
@@ -248,6 +248,8 @@ tgsi_scan_shader(const struct tgsi_token *tokens,
                   }
                   else if (semName == TGSI_SEMANTIC_PRIMID) {
                      info->uses_primid = TRUE;
+                  } else if (semName == TGSI_SEMANTIC_INVOCATIONID) {
+                     info->uses_invocationid = TRUE;
                   }
                }
                else if (file == TGSI_FILE_OUTPUT) {
diff --git a/src/gallium/auxiliary/tgsi/tgsi_scan.h b/src/gallium/auxiliary/tgsi/tgsi_scan.h
index af4b128fcaf..b81bdd71f14 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_scan.h
+++ b/src/gallium/auxiliary/tgsi/tgsi_scan.h
@@ -89,6 +89,7 @@ struct tgsi_shader_info
    boolean uses_basevertex;
    boolean uses_primid;
    boolean uses_frontface;
+   boolean uses_invocationid;
    boolean writes_psize;
    boolean writes_clipvertex;
    boolean writes_viewport_index;