tgsi: add uses_centroid into tgsi_shader_info

2 files changed, 4 insertions, 0 deletions

diff --git a/src/gallium/auxiliary/tgsi/tgsi_scan.c b/src/gallium/auxiliary/tgsi/tgsi_scan.c
index eb313e430d6..6210ebdb3ad 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_scan.c
+++ b/src/gallium/auxiliary/tgsi/tgsi_scan.c
@@ -191,6 +191,9 @@ tgsi_scan_shader(const struct tgsi_token *tokens,
                   info->input_cylindrical_wrap[reg] = (ubyte)fulldecl->Interp.CylindricalWrap;
                   info->num_inputs++;
 
+                  if (fulldecl->Interp.Location == TGSI_INTERPOLATE_LOC_CENTROID)
+                     info->uses_centroid = TRUE;
+
                   if (semName == TGSI_SEMANTIC_PRIMID)
                      info->uses_primid = TRUE;
                   else if (procType == TGSI_PROCESSOR_FRAGMENT) {
diff --git a/src/gallium/auxiliary/tgsi/tgsi_scan.h b/src/gallium/auxiliary/tgsi/tgsi_scan.h
index 375f75a3b98..bacb4aba242 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_scan.h
+++ b/src/gallium/auxiliary/tgsi/tgsi_scan.h
@@ -72,6 +72,7 @@ struct tgsi_shader_info
    boolean writes_stencil; /**< does fragment shader write stencil value? */
    boolean writes_edgeflag; /**< vertex shader outputs edgeflag */
    boolean uses_kill;  /**< KILL or KILL_IF instruction used? */
+   boolean uses_centroid;
    boolean uses_instanceid;
    boolean uses_vertexid;
    boolean uses_vertexid_nobase;