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-rw-r--r--src/gallium/auxiliary/tgsi/tgsi_scan.c3
-rw-r--r--src/gallium/auxiliary/tgsi/tgsi_scan.h1
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 4645ef26cab..e04f4076e9c 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_scan.c
+++ b/src/gallium/auxiliary/tgsi/tgsi_scan.c
@@ -365,6 +365,9 @@ tgsi_scan_shader(const struct tgsi_token *tokens,
info->output_semantic_index[reg] = (ubyte) semIndex;
info->num_outputs++;
+ if (semName == TGSI_SEMANTIC_COLOR)
+ info->colors_written |= 1 << semIndex;
+
if (procType == TGSI_PROCESSOR_VERTEX ||
procType == TGSI_PROCESSOR_GEOMETRY ||
procType == TGSI_PROCESSOR_TESS_CTRL ||
diff --git a/src/gallium/auxiliary/tgsi/tgsi_scan.h b/src/gallium/auxiliary/tgsi/tgsi_scan.h
index d60ccabda6d..7e9a5597db2 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_scan.h
+++ b/src/gallium/auxiliary/tgsi/tgsi_scan.h
@@ -77,6 +77,7 @@ struct tgsi_shader_info
uint opcode_count[TGSI_OPCODE_LAST]; /**< opcode histogram */
+ ubyte colors_written;
boolean reads_position; /**< does fragment shader read position? */
boolean reads_z; /**< does fragment shader read depth? */
boolean writes_z; /**< does fragment shader write Z value? */