Corrected a comment about how the DOT3 hardware works in the R200.

diff --git a/src/mesa/drivers/dri/r200/r200_texstate.c b/src/mesa/drivers/dri/r200/r200_texstate.c
index b57657c..2eb6962 100644 (file)
--- a/src/mesa/drivers/dri/r200/r200_texstate.c
+++ b/src/mesa/drivers/dri/r200/r200_texstate.c
@@ -1038,10 +1038,10 @@ static GLboolean r200UpdateTextureEnv( GLcontext *ctx, int unit )
         case GL_DOT3_RGBA:
            /* DOT3 works differently on R200 than on R100.  On R100, just
             * setting the DOT3 mode did everything for you.  On R200, the
-            * driver has to enable the biasing (the -0.5 in the combine
-            * equation), and it has add the 4x scale factor.  The hardware
-            * only supports up to 8x in the post filter, so 2x part of it
-            * happens on the inputs going into the combiner.
+            * driver has to enable the biasing and scale in the inputs to
+            * put them in the proper [-1,1] range.  This is what the 4x and
+            * the -0.5 in the DOT3 spec do.  The post-scale is then set
+            * normally.
             */
 
            RGBshift++;