[pango/simple-fontmap: 34/35] Fix vertical metrics

[Matthias Clasen <matthiasc src gnome org>]

commit 6bc23a21bedc4ad5d9ccb5f680deff1baf8ed36c
Author: Matthias Clasen <mclasen redhat com>
Date:   Thu Oct 21 13:43:43 2021 -0500

    Fix vertical metrics
    
    If the gravity is vertical, ask harfbuzz for vertical
    metrics. This fixes glyph positioning  in vertical text.

 pango/pango-hbfont.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)
---
diff --git a/pango/pango-hbfont.c b/pango/pango-hbfont.c
index 2e4da212..67abfa51 100644
--- a/pango/pango-hbfont.c
+++ b/pango/pango-hbfont.c
@@ -224,9 +224,13 @@ pango_hb_font_get_glyph_extents (PangoFont      *font,
     {
       hb_font_extents_t font_extents;
       hb_position_t x, y;
+      hb_direction_t direction;
 
-      hb_font_get_extents_for_direction (hb_font, HB_DIRECTION_LTR, &font_extents);
-      hb_font_get_glyph_advance_for_direction (hb_font, glyph, HB_DIRECTION_LTR, &x, &y);
+      direction = PANGO_GRAVITY_IS_VERTICAL (PANGO_HB_FONT (font)->gravity)
+                  ? HB_DIRECTION_TTB : HB_DIRECTION_LTR;
+
+      hb_font_get_extents_for_direction (hb_font, direction, &font_extents);
+      hb_font_get_glyph_advance_for_direction (hb_font, glyph, direction, &x, &y);
 
       logical_rect->x = 0;
       logical_rect->width = x;