[pango/fix-letterspacing] fixup! Improve letterspacing with marks

[Matthias Clasen <matthiasc src gnome org>]

commit c020014d66669b26f037e070c2b914ea72aa73e4
Author: Matthias Clasen <mclasen redhat com>
Date:   Fri Mar 19 08:30:22 2021 -0400

    fixup! Improve letterspacing with marks
    
    Handle non-spacing marks in rtl too

 pango/pango-glyph-item.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
---
diff --git a/pango/pango-glyph-item.c b/pango/pango-glyph-item.c
index d1d44189..685fd9b6 100644
--- a/pango/pango-glyph-item.c
+++ b/pango/pango-glyph-item.c
@@ -763,7 +763,10 @@ pango_glyph_item_letter_space (PangoGlyphItem *glyph_item,
         {
           if (glyphs[iter.start_glyph].geometry.width == 0)
             {
-              glyphs[iter.start_glyph].geometry.x_offset -= space_right;
+              if (iter.start_glyph < iter.end_glyph) /* LTR */
+                glyphs[iter.start_glyph].geometry.x_offset -= space_right;
+              else
+                glyphs[iter.start_glyph].geometry.x_offset += space_right;
             }
           continue;
         }