reduced swizzle comment

2005-10-29 18:18:46 +00:00
parent 1a979736a6
commit 5b3cf5af74
1 changed files with 4 additions and 0 deletions
--- a/src/mesa/tnl/t_vb_arbprogram.h
+++ b/src/mesa/tnl/t_vb_arbprogram.h
@@ -112,6 +112,10 @@ union instruction {
   GLuint dword;
 };

+
+/**
+ * Reduced swizzle is a 2-bit field; only X/Y/Z/W are allowed, not 0/1.
+ */
 #define RSW_NOOP ((0<<0) | (1<<2) | (2<<4) | (3<<6))
 #define GET_RSW(swz, idx)      (((swz) >> ((idx)*2)) & 0x3)