From 9c09259b8bef8f120cc6f4bb1a44f0eae37d71b3 Mon Sep 17 00:00:00 2001
From: Michel Dänzer <michel@tungstengraphics.com>
Date: Thu, 14 Dec 2006 10:01:43 +0100
Subject: _mesa_swizzle_ubyte_image: Only use single swizzle_copy call when
 strides match.

This fixes texture data corruption with glTexSubimage (and probably glTexImage
under some circumstances) with the texstore swizzle path.
---
 src/mesa/main/texstore.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'src/mesa/main')

diff --git a/src/mesa/main/texstore.c b/src/mesa/main/texstore.c
index 89563842c2..87f8fa7a0d 100644
--- a/src/mesa/main/texstore.c
+++ b/src/mesa/main/texstore.c
@@ -808,7 +808,8 @@ _mesa_swizzle_ubyte_image(GLcontext *ctx,
 
 /*    _mesa_printf("map %d %d %d %d\n", map[0], map[1], map[2], map[3]);  */
 
-   if (srcRowStride == srcWidth * srcComponents &&
+   if (srcRowStride == dstRowStride &&
+       srcRowStride == srcWidth * srcComponents &&
        dimensions < 3) {
       /* 1 and 2D images only */
       GLubyte *dstImage = (GLubyte *) dstAddr
-- 
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