From 34ff2d3ea6b7d3b748d82266e86c4a4d3fe31585 Mon Sep 17 00:00:00 2001
From: Khaled Hosny <khaled@aliftype.com>
Date: Sat, 11 Sep 2021 00:12:03 +0200
Subject: [PATCH] Fix build with -Dexperimental_api=true

../src/hb-style.cc:102:32: error: no matching function for call to 'hb_style_get_value'
    return _hb_angle_to_ratio (hb_style_get_value (HB_STYLE_TAG_SLANT_ANGLE));
                               ^~~~~~~~~~~~~~~~~~
../src/hb-style.cc:99:1: note: candidate function not viable: requires 2 arguments, but 1 was provided
hb_style_get_value (hb_font_t *font, hb_tag_t tag)
^

and

../src/hb-style.cc:80:1: error: unused function '_hb_ratio_to_angle' [-Werror,-Wunused-function]
_hb_ratio_to_angle (float r)
^
---
 src/hb-style.cc | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/hb-style.cc b/src/hb-style.cc
index 951e8982d..1d26ac5dd 100644
--- a/src/hb-style.cc
+++ b/src/hb-style.cc
@@ -76,11 +76,13 @@ _hb_angle_to_ratio (float a)
 {
   return tanf (a * (M_PI / 180.f));
 }
+#if 0
 static inline float
 _hb_ratio_to_angle (float r)
 {
   return atanf (r) * (180.f / M_PI);
 }
+#endif
 
 /**
  * hb_style_get_value:
@@ -99,7 +101,7 @@ float
 hb_style_get_value (hb_font_t *font, hb_tag_t tag)
 {
   if (unlikely (tag == HB_STYLE_TAG_SLANT_RATIO))
-    return _hb_angle_to_ratio (hb_style_get_value (HB_STYLE_TAG_SLANT_ANGLE));
+    return _hb_angle_to_ratio (hb_style_get_value (font, HB_STYLE_TAG_SLANT_ANGLE));
 
   hb_style_tag_t style_tag = (hb_style_tag_t) tag;
   hb_face_t *face = font->face;