From: Xiang, Haihao <haihao.xiang@intel.com>
Date: Fri, 31 Aug 2007 08:50:48 +0000 (+0800)
Subject: i965: Calculate the positional light in homogeneous coordinates.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=214347fdb4c30dc8bac5d4b9a823458709bc53ea;p=mesa.git

i965: Calculate the positional light in homogeneous coordinates.
fix bug#11009
---

diff --git a/src/mesa/drivers/dri/i965/brw_vs_tnl.c b/src/mesa/drivers/dri/i965/brw_vs_tnl.c
index b69be350a92..339a3304483 100644
--- a/src/mesa/drivers/dri/i965/brw_vs_tnl.c
+++ b/src/mesa/drivers/dri/i965/brw_vs_tnl.c
@@ -1003,6 +1003,11 @@ static void build_lighting( struct tnl_program *p )
 
 	    VPpli = get_temp(p); 
 	    half = get_temp(p);
+
+       /* In homogeneous object coordinates
+        */
+       emit_op1(p, OPCODE_RCP, dist, 0, swizzle1(Ppli, W));
+       emit_op2(p, OPCODE_MUL, Ppli, 0, Ppli, dist);
  
 	    /* Calulate VPpli vector
 	     */
diff --git a/src/mesa/tnl/t_vp_build.c b/src/mesa/tnl/t_vp_build.c
index ee1a2498b32..336f3c7a2a2 100644
--- a/src/mesa/tnl/t_vp_build.c
+++ b/src/mesa/tnl/t_vp_build.c
@@ -960,6 +960,11 @@ static void build_lighting( struct tnl_program *p )
 	    VPpli = get_temp(p); 
 	    half = get_temp(p);
  
+       /* In homogeneous object coordinates
+        */
+       emit_op1(p, OPCODE_RCP, dist, 0, swizzle1(Ppli, W));
+       emit_op2(p, OPCODE_MUL, Ppli, 0, Ppli, dist);
+
 	    /* Calulate VPpli vector
 	     */
 	    emit_op2(p, OPCODE_SUB, VPpli, 0, Ppli, V);