From d2aa2397bae6a6550060686da4cad1426eb2ad1f Mon Sep 17 00:00:00 2001
From: Behdad Esfahbod <behdad@behdad.org>
Date: Mon, 9 Jan 2023 13:43:56 -0700
Subject: [PATCH] Optimize non-slant extents code

---
 src/hb-font.hh | 7 +++++--
 src/hb-ft.cc   | 7 +++++--
 2 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/src/hb-font.hh b/src/hb-font.hh
index 420e3919e..295972509 100644
--- a/src/hb-font.hh
+++ b/src/hb-font.hh
@@ -188,8 +188,11 @@ struct hb_font_t
     float y2 = em_fscale_y (extents->y_bearing + extents->height);
 
     /* Apply slant. */
-    x1 += hb_min (y1 * slant_xy, y2 * slant_xy);
-    x2 += hb_max (y1 * slant_xy, y2 * slant_xy);
+    if (slant_xy)
+    {
+      x1 += hb_min (y1 * slant_xy, y2 * slant_xy);
+      x2 += hb_max (y1 * slant_xy, y2 * slant_xy);
+    }
 
     extents->x_bearing = floorf (x1);
     extents->y_bearing = floorf (y1);
diff --git a/src/hb-ft.cc b/src/hb-ft.cc
index e88276fae..34aa194c8 100644
--- a/src/hb-ft.cc
+++ b/src/hb-ft.cc
@@ -630,8 +630,11 @@ hb_ft_get_glyph_extents (hb_font_t *font,
   float y2 = y1 + y_mult * -ft_face->glyph->metrics.height;
 
   /* Apply slant. */
-  x1 += hb_min (y1 * slant_xy, y2 * slant_xy);
-  x2 += hb_max (y1 * slant_xy, y2 * slant_xy);
+  if (slant_xy)
+  {
+    x1 += hb_min (y1 * slant_xy, y2 * slant_xy);
+    x2 += hb_max (y1 * slant_xy, y2 * slant_xy);
+  }
 
   extents->x_bearing = floorf (x1);
   extents->y_bearing = floorf (y1);