From 98dffd9764195be2734579a2b4ae7637b62ea7d8 Mon Sep 17 00:00:00 2001
From: Brian Paul <brianp@vmware.com>
Date: Mon, 26 Dec 2011 14:49:57 -0700
Subject: swrast: assert _swrast_map_teximage() x, y is multiple of block size

---
 src/mesa/swrast/s_texture.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/mesa/swrast/s_texture.c b/src/mesa/swrast/s_texture.c
index e31cd62679b..ffd78a2b895 100644
--- a/src/mesa/swrast/s_texture.c
+++ b/src/mesa/swrast/s_texture.c
@@ -189,6 +189,9 @@ _swrast_map_teximage(struct gl_context *ctx,
    stride = _mesa_format_row_stride(texImage->TexFormat, texImage->Width);
    _mesa_get_format_block_size(texImage->TexFormat, &bw, &bh);
 
+   assert(x % bw == 0);
+   assert(y % bh == 0);
+
    if (!swImage->Buffer) {
       /* probably ran out of memory when allocating tex mem */
       *mapOut = NULL;
-- 
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