Mesa (master): gallium/util: add sanity check assertions

[Brian Paul]

Module: Mesa
Branch: master
Commit: 41d0606b7f4666c31db31bec3c54934ef6cd16e7
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=41d0606b7f4666c31db31bec3c54934ef6cd16e7

Author: Brian Paul <brianp at vmware.com>
Date:   Fri Sep 25 17:19:25 2009 -0600

gallium/util: add sanity check assertions

---

 src/gallium/auxiliary/util/u_gen_mipmap.c |   11 +++++++++++
 1 files changed, 11 insertions(+), 0 deletions(-)

diff --git a/src/gallium/auxiliary/util/u_gen_mipmap.c b/src/gallium/auxiliary/util/u_gen_mipmap.c
index 833c0b8..2f24a5a 100644
--- a/src/gallium/auxiliary/util/u_gen_mipmap.c
+++ b/src/gallium/auxiliary/util/u_gen_mipmap.c
@@ -1519,6 +1519,17 @@ util_gen_mipmap(struct gen_mipmap_state *ctx,
    uint zslice = 0;
    uint offset;
 
+   /* The texture object should have room for the levels which we're
+    * about to generate.
+    */
+   assert(lastLevel <= pt->last_level);
+
+   /* If this fails, why are we here? */
+   assert(lastLevel > baseLevel);
+
+   assert(filter == PIPE_TEX_FILTER_LINEAR ||
+          filter == PIPE_TEX_FILTER_NEAREST);
+
    /* check if we can render in the texture's format */
    if (!screen->is_format_supported(screen, pt->format, PIPE_TEXTURE_2D,
                                     PIPE_TEXTURE_USAGE_RENDER_TARGET, 0)) {