From: Brian Paul <brianp@vmware.com>
Date: Wed, 29 Feb 2012 14:52:18 +0000 (-0700)
Subject: svga: fix max_lod clamping in update_tss_binding()
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=83fed5e13081f2f5c7156f4f706eabbd6a87c5ae;p=mesa.git

svga: fix max_lod clamping in update_tss_binding()

After biasing we need to clamp to be sure we don't exceed the number of
levels in the mipmap.  This fixes an assertion at svga_sampler_view.c:70

v2: simplify the biasing, clamping code per Jose's suggestion.

Reviewed-by: José Fonseca <jfonseca@vmware.com>
---

diff --git a/src/gallium/drivers/svga/svga_state_tss.c b/src/gallium/drivers/svga/svga_state_tss.c
index 8eb0dbf4708..d5ed804b0c0 100644
--- a/src/gallium/drivers/svga/svga_state_tss.c
+++ b/src/gallium/drivers/svga/svga_state_tss.c
@@ -87,8 +87,8 @@ update_tss_binding(struct svga_context *svga,
       /* get min max lod */
       if (sv) {
          min_lod = MAX2(0, (s->view_min_lod + sv->u.tex.first_level));
-         max_lod = MIN2(s->view_max_lod, sv->texture->last_level);
-         max_lod += sv->u.tex.first_level;
+         max_lod = MIN2(s->view_max_lod + sv->u.tex.first_level,
+                        sv->texture->last_level);
          texture = sv->texture;
       } else {
          min_lod = 0;