From: Ian Romanick <idr@us.ibm.com>
Date: Thu, 7 Oct 2004 16:39:20 +0000 (+0000)
Subject: Prevent Y-offset from exceeding valid range in texture upload code.  This
X-Git-Tag: mesa-7.8~10521
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=554e5a2eaf4b681b5c43b6aeb66f100a66da4a42;p=platform%2Fupstream%2Fmesa.git

Prevent Y-offset from exceeding valid range in texture upload code.  This
fixes bugzilla #960.
---

diff --git a/src/mesa/drivers/dri/r200/r200_texmem.c b/src/mesa/drivers/dri/r200/r200_texmem.c
index b219995..bc937ce 100644
--- a/src/mesa/drivers/dri/r200/r200_texmem.c
+++ b/src/mesa/drivers/dri/r200/r200_texmem.c
@@ -382,6 +382,14 @@ static void uploadSubImage( r200ContextPtr rmesa, r200TexObjPtr t,
    /* copy (x,y,width,height,data) */
    memcpy( &tmp, &t->image[face][hwlevel], sizeof(tmp) );
 
+   /* Adjust the base offset to account for the Y-offset.  This is done,
+    * instead of just letting the Y-offset automatically take care of it,
+    * because it is possible, for very large textures, for the Y-offset
+    * to exceede the [-8192,+8191] range.
+    */
+   tex.offset += tmp.y * 1024;
+   tmp.y = 0;
+    
    LOCK_HARDWARE( rmesa );
    do {
       ret = drmCommandWriteRead( rmesa->dri.fd, DRM_RADEON_TEXTURE,