Mesa (master): mesa: when emitting vertex program fog, set yzw=0,0,1

[Brian Paul]

Module: Mesa
Branch: master
Commit: ee0984e299f7a48fbd3a0172ec9c471e0e8cbb92
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=ee0984e299f7a48fbd3a0172ec9c471e0e8cbb92

Author: Brian Paul <brianp at vmware.com>
Date:   Tue Aug 18 17:39:55 2009 -0600

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

Fixes piglit fp-fog failure with gallium.

---

 src/mesa/main/ffvertex_prog.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/src/mesa/main/ffvertex_prog.c b/src/mesa/main/ffvertex_prog.c
index 80dde4b..8e21a27 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));
 }