To cut the long and boring story short, polygon offsets should now work. vb mode colorbuffer clears are still mysticly broken by offsets... Maybe we need to merge zbs and unk42B4 together?

1 files changed, 12 insertions, 2 deletions

diff --git a/src/mesa/drivers/dri/r300/r300_reg.h b/src/mesa/drivers/dri/r300/r300_reg.h
index 557c55dbbe..1c69582138 100644
--- a/src/mesa/drivers/dri/r300/r300_reg.h
+++ b/src/mesa/drivers/dri/r300/r300_reg.h
@@ -16,8 +16,12 @@ 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	/* guess */
-#define R300_SE_ZBIAS_CONSTANT              0x1DB4	/* guess */
+/*
+VB mode colorbuffer clears are broken with these too so these would
+probably work also. --aet
+*/
+#define R300_SE_ZBIAS_FACTOR                0x1DB0
+#define R300_SE_ZBIAS_CONSTANT              0x1DB4
 
 /* This register is written directly and also starts data section in many 3d CP_PACKET3's */
 #define R300_VAP_VF_CNTL	0x2084
@@ -421,9 +425,15 @@ I am fairly certain that they are correct unless stated otherwise in comments.
 #       define R300_POINTSIZE_X_SHIFT            16
 #       define R300_POINTSIZE_X_MASK             (0xFFFF << 16) /* GUESS */
 
+#define R300_RE_ZBIAS_T_FACTOR                0x42A4
+#define R300_RE_ZBIAS_T_CONSTANT              0x42A8
+#define R300_RE_ZBIAS_W_FACTOR                0x42AC
+#define R300_RE_ZBIAS_W_CONSTANT              0x42B0
+
 /* This register needs to be set to (1<<1) for RV350 to correctly
    perform depth test (see --vb-triangles in r300_demo)
    Don't know about other chips. - Vladimir
+   This is set to 3 when GL_POLYGON_OFFSET_FILL is on.
     */
 #define R300_RE_OCCLUSION_CNTL		    0x42B4
 #	define R300_OCCLUSION_ON		(1<<1)