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-rw-r--r--src/gallium/auxiliary/tgsi/tgsi_scan.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/src/gallium/auxiliary/tgsi/tgsi_scan.c b/src/gallium/auxiliary/tgsi/tgsi_scan.c
index 6ea32eedd74..7a02e27e01e 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_scan.c
+++ b/src/gallium/auxiliary/tgsi/tgsi_scan.c
@@ -373,7 +373,10 @@ tgsi_scan_shader(const struct tgsi_token *tokens,
info->uses_primid = TRUE;
} else if (semName == TGSI_SEMANTIC_INVOCATIONID) {
info->uses_invocationid = TRUE;
- }
+ } else if (semName == TGSI_SEMANTIC_POSITION)
+ info->reads_position = TRUE;
+ else if (semName == TGSI_SEMANTIC_FACE)
+ info->uses_frontface = TRUE;
}
else if (file == TGSI_FILE_OUTPUT) {
info->output_semantic_name[reg] = (ubyte) semName;