From 9194e13e25563f7170c68b0126f5852925c526ff Mon Sep 17 00:00:00 2001
From: Behdad Esfahbod <behdad@behdad.org>
Date: Thu, 22 Dec 2022 07:31:16 -0700
Subject: [PATCH] [font] Apply slant to glyph extents

Fixes https://github.com/harfbuzz/harfbuzz/issues/3952

hb-ft not fixed since doesn't use this code.
---
 src/hb-font.hh | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/hb-font.hh b/src/hb-font.hh
index 4e4a98766..08f9c5c4f 100644
--- a/src/hb-font.hh
+++ b/src/hb-font.hh
@@ -185,6 +185,10 @@ struct hb_font_t
     extents->y_bearing = em_scale_x (extents->y_bearing);
     extents->width = em_scale_x (extents->width);
     extents->height = em_scale_x (extents->height);
+
+    /* Apply slant. */
+    extents->x_bearing += roundf (extents->y_bearing * slant_xy);
+    extents->width += roundf (extents->height * slant_xy);
   }