From: Brian Paul <brianp@vmware.com>
Date: Tue, 18 Aug 2009 23:39:55 +0000 (-0600)
Subject: mesa: when emitting vertex program fog, set yzw=0,0,1
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=ee0984e299f7a48fbd3a0172ec9c471e0e8cbb92;p=mesa.git

mesa: when emitting vertex program fog, set yzw=0,0,1

Fixes piglit fp-fog failure with gallium.
---

diff --git a/src/mesa/main/ffvertex_prog.c b/src/mesa/main/ffvertex_prog.c
index 80dde4b5aa2..8e21a27f897 100644
--- a/src/mesa/main/ffvertex_prog.c
+++ b/src/mesa/main/ffvertex_prog.c
@@ -1306,7 +1306,9 @@ static void build_fog( struct tnl_program *p )
       input = swizzle1(register_input(p, VERT_ATTRIB_FOG), X);
    }
 
+   /* result.fog = {abs(f),0,0,1}; */
    emit_op1(p, OPCODE_ABS, fog, WRITEMASK_X, input);
+   emit_op1(p, OPCODE_MOV, fog, WRITEMASK_YZW, get_identity_param(p));
 }