From 7ba38ad62e1d92f4b3db74ea2077add20547c07e Mon Sep 17 00:00:00 2001
From: Huw Davies <huw@codeweavers.com>
Date: Mon, 14 Jan 2013 13:17:17 +0000
Subject: [PATCH] usp10: Fix MarkToBase offset for RTL text.

---
 dlls/usp10/opentype.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/dlls/usp10/opentype.c b/dlls/usp10/opentype.c
index 193889236b9..f8cf8a1bbe2 100644
--- a/dlls/usp10/opentype.c
+++ b/dlls/usp10/opentype.c
@@ -1730,7 +1730,9 @@ static INT GPOS_apply_lookup(LPOUTLINETEXTMETRICW lpotm, LPLOGFONTW lplogfont, c
             if (desU.x || desU.y)
             {
                 GPOS_convert_design_units_to_device(lpotm, lplogfont, desU.x, desU.y, &devX, &devY);
-                pGoffset[glyph_index].du += (round(devX) - piAdvance[glyph_index-1]);
+                if (!analysis->fRTL) pGoffset[glyph_index].du -= piAdvance[glyph_index-1];
+                else if (analysis->fLogicalOrder) devX *= -1;
+                pGoffset[glyph_index].du += round(devX);
                 pGoffset[glyph_index].dv += round(devY);
             }
             break;