From c1a544733749cd388b9f51d087c695b2ce0ec729 Mon Sep 17 00:00:00 2001
From: Brian <brian@yutani.localnet.net>
Date: Mon, 12 Mar 2007 09:35:44 -0600
Subject: [PATCH] take GL_UNPACK_ALIGNMENT into account in
 _mesa_image_row_stride() for GL_BITMAP type (bug 10261)

---
 src/mesa/main/image.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/mesa/main/image.c b/src/mesa/main/image.c
index eb91ebb6110..58dd771484c 100644
--- a/src/mesa/main/image.c
+++ b/src/mesa/main/image.c
@@ -667,7 +667,7 @@ _mesa_image_row_stride( const struct gl_pixelstore_attrib *packing,
    ASSERT(packing);
    if (type == GL_BITMAP) {
       /* BITMAP data */
-      GLint bytes;
+      GLint bytes, remainder;
       if (packing->RowLength == 0) {
          bytes = (width + 7) / 8;
       }
@@ -678,6 +678,11 @@ _mesa_image_row_stride( const struct gl_pixelstore_attrib *packing,
          /* negate the bytes per row (negative row stride) */
          bytes = -bytes;
       }
+
+      remainder = bytes % packing->Alignment;
+      if (remainder > 0)
+         bytes += (packing->Alignment - remainder);
+
       return bytes;
    }
    else {
-- 
2.30.2