_mesa_swizzle_ubyt_image: Don't use single swizzle_copy call
if components don't match. fix #13508
diff --git a/src/mesa/main/texstore.c b/src/mesa/main/texstore.c
index a8e639b..37d6f81 100644
--- a/src/mesa/main/texstore.c
+++ b/src/mesa/main/texstore.c
@@ -809,6 +809,7 @@
/* _mesa_printf("map %d %d %d %d\n", map[0], map[1], map[2], map[3]); */
if (srcRowStride == dstRowStride &&
+ srcComponents == dstComponents &&
srcRowStride == srcWidth * srcComponents &&
dimensions < 3) {
/* 1 and 2D images only */