From: Axel Davy <axel.davy@ens.fr>
Date: Sun, 21 Feb 2016 15:38:23 +0000 (+0100)
Subject: st/nine: Forbid POSITION0 for PS3.0
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=a77d8cd710ec5091e9c31167032427189ae77437;p=mesa.git

st/nine: Forbid POSITION0 for PS3.0

POSITION0 input is forbidden for PS3.0 apparently.

Signed-off-by: Axel Davy <axel.davy@ens.fr>
---

diff --git a/src/gallium/state_trackers/nine/nine_shader.c b/src/gallium/state_trackers/nine/nine_shader.c
index 4ad5fa1723d..4698fd77e97 100644
--- a/src/gallium/state_trackers/nine/nine_shader.c
+++ b/src/gallium/state_trackers/nine/nine_shader.c
@@ -2054,6 +2054,11 @@ DECL_SPECIAL(DCL)
             assert(sem.reg.idx < ARRAY_SIZE(tx->regs.v));
 
             if (tgsi.Name == TGSI_SEMANTIC_POSITION) {
+                /* Position0/PositionT0 are forbidden (likely because vPos already does that) */
+                if (sem.usage == D3DDECLUSAGE_POSITION ||
+                    sem.usage == D3DDECLUSAGE_POSITIONT)
+                    return D3DERR_INVALIDCALL;
+                /* Following code is for depth */
                 tx->regs.v[sem.reg.idx] = nine_get_position_input(tx);
                 return D3D_OK;
             }