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-rw-r--r--src/mesa/tnl/t_vb_arbprogram.h11
1 files changed, 7 insertions, 4 deletions
diff --git a/src/mesa/tnl/t_vb_arbprogram.h b/src/mesa/tnl/t_vb_arbprogram.h
index 5b100a0902..02cd432825 100644
--- a/src/mesa/tnl/t_vb_arbprogram.h
+++ b/src/mesa/tnl/t_vb_arbprogram.h
@@ -40,10 +40,13 @@
#define MSK (VP_MAX_OPCODE+1)
#define REL (VP_MAX_OPCODE+2)
-#define FILE_REG 0
-#define FILE_LOCAL_PARAM 1
-#define FILE_ENV_PARAM 2
-#define FILE_STATE_PARAM 3
+/**
+ * Register files for vertex programs
+ */
+#define FILE_REG 0 /* temporaries */
+#define FILE_LOCAL_PARAM 1 /* local parameters */
+#define FILE_ENV_PARAM 2 /* global parameters */
+#define FILE_STATE_PARAM 3 /* GL state references */
#define REG_ARG0 0
#define REG_ARG1 1