draw: Implement support for primitive id

We were largely ignoring primitive id.

Signed-off-by: Zack Rusin <[email protected]>
Reviewed-by: José Fonseca <[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 c59b3a75bd9..373391d62c1 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_scan.c
+++ b/src/gallium/auxiliary/tgsi/tgsi_scan.c
@@ -186,6 +186,8 @@ tgsi_scan_shader(const struct tgsi_token *tokens,
                   }
                   else if (fulldecl->Semantic.Name == TGSI_SEMANTIC_VERTEXID) {
                      info->uses_vertexid = TRUE;
+                  } else if (fulldecl->Semantic.Name == TGSI_SEMANTIC_PRIMID) {
+                     info->uses_primid = 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 235e6a3fae0..9debc341f52 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_scan.h
+++ b/src/gallium/auxiliary/tgsi/tgsi_scan.h
@@ -71,6 +71,7 @@ struct tgsi_shader_info
    boolean uses_kill;  /**< KIL or KILP instruction used? */
    boolean uses_instanceid;
    boolean uses_vertexid;
+   boolean uses_primid;
    boolean origin_lower_left;
    boolean pixel_center_integer;
    boolean color0_writes_all_cbufs;