Mark ZBIAS definitions.

diff --git a/src/mesa/drivers/dri/r300/r300_reg.h b/src/mesa/drivers/dri/r300/r300_reg.h
index 526bb1148786023f28b3f04eb9100d538f452ef5..557c55dbbe7c44c8e9e367ef6a84fea36e06041a 100644 (file)
--- a/src/mesa/drivers/dri/r300/r300_reg.h
+++ b/src/mesa/drivers/dri/r300/r300_reg.h
@@ -16,8 +16,8 @@ I am fairly certain that they are correct unless stated otherwise in comments.
 #define R300_SE_VPORT_ZSCALE                0x1DA8
 #define R300_SE_VPORT_ZOFFSET               0x1DAC
 
-#define R300_SE_ZBIAS_FACTOR                0x1DB0
-#define R300_SE_ZBIAS_CONSTANT              0x1DB4
+#define R300_SE_ZBIAS_FACTOR                0x1DB0     /* guess */
+#define R300_SE_ZBIAS_CONSTANT              0x1DB4     /* guess */
 
 /* This register is written directly and also starts data section in many 3d CP_PACKET3's */
 #define R300_VAP_VF_CNTL       0x2084