From: Brian <brian.paul@tungstengraphics.com>
Date: Mon, 4 Feb 2008 23:48:00 +0000 (-0700)
Subject: Cell: fix small sampling error in sample_texture_bilinear()
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=d17e3362592c58f0d5d47745fd97b3b31d1a684a;p=mesa.git

Cell: fix small sampling error in sample_texture_bilinear()
---

diff --git a/src/mesa/pipe/cell/spu/spu_texture.c b/src/mesa/pipe/cell/spu/spu_texture.c
index 9ee2b45e24e..01ff33a8573 100644
--- a/src/mesa/pipe/cell/spu/spu_texture.c
+++ b/src/mesa/pipe/cell/spu/spu_texture.c
@@ -150,6 +150,8 @@ sample_texture_bilinear(vector float texcoord)
    static const vector unsigned int offset01 = {0, 1, 0, 0};
 
    vector float tc = spu_mul(texcoord, spu.tex_size);
+   tc = spu_add(tc, spu_splats(-0.5f));  /* half texel bias */
+
    /* integer texcoords S,T: */
    vector unsigned int itc00 = spu_convtu(tc, 0);  /* convert to int */
    vector unsigned int itc01 = spu_add(itc00, offset01);