From e0fec1dda01f1060dd474537dcbe5084ef46a88f Mon Sep 17 00:00:00 2001
From: Simon Cozens <simon@simon-cozens.org>
Date: Thu, 23 Feb 2023 22:18:22 +0000
Subject: [PATCH] [wasm-api] Wrap some of hb-font

---
 src/hb-wasm-api-font.hh | 31 +++++++++++++++++++++++++++++++
 src/hb-wasm-api-list.hh |  5 ++++-
 src/hb-wasm-api.h       | 11 +++++++++++
 3 files changed, 46 insertions(+), 1 deletion(-)

diff --git a/src/hb-wasm-api-font.hh b/src/hb-wasm-api-font.hh
index e495e8acd..2b1921cc8 100644
--- a/src/hb-wasm-api-font.hh
+++ b/src/hb-wasm-api-font.hh
@@ -43,6 +43,37 @@ font_get_face (HB_WASM_EXEC_ENV
   return faceref;
 }
 
+hb_codepoint_t
+font_get_glyph (HB_WASM_EXEC_ENV
+		ptr_t(font_t) fontref,
+		hb_codepoint_t unicode,
+		hb_codepoint_t variation_selector)
+{
+  HB_REF2OBJ (font);
+  hb_codepoint_t glyph;
+
+  hb_font_get_glyph (font, unicode, variation_selector, &glyph);
+  return glyph;
+}
+
+
+hb_position_t
+font_get_glyph_h_advance (HB_WASM_EXEC_ENV
+			  ptr_t(font_t) fontref,
+			  hb_codepoint_t glyph)
+{
+  HB_REF2OBJ (font);
+  return hb_font_get_glyph_h_advance (font, glyph);
+}
+
+hb_position_t
+font_get_glyph_v_advance (HB_WASM_EXEC_ENV
+			  ptr_t(font_t) fontref,
+			  hb_codepoint_t glyph)
+{
+  HB_REF2OBJ (font);
+  return hb_font_get_glyph_v_advance (font, glyph);
+}
 
 }}
 
diff --git a/src/hb-wasm-api-list.hh b/src/hb-wasm-api-list.hh
index 14a1f60ab..df39ad17b 100644
--- a/src/hb-wasm-api-list.hh
+++ b/src/hb-wasm-api-list.hh
@@ -62,7 +62,10 @@ static NativeSymbol _hb_wasm_native_symbols[] =
   NATIVE_SYMBOL ("(iii)",	face_reference_table),
 
   /* font */
-  NATIVE_SYMBOL ("(i)i",	font_get_face),
+  NATIVE_SYMBOL ("(i)i",		font_get_face),
+  NATIVE_SYMBOL ("(iii)i",	font_get_glyph),
+  NATIVE_SYMBOL ("(ii)i",		font_get_glyph_h_advance),
+  NATIVE_SYMBOL ("(ii)i",		font_get_glyph_v_advance),
 
   /* debug */
 #ifdef HB_DEBUG_WASM
diff --git a/src/hb-wasm-api.h b/src/hb-wasm-api.h
index 1adb4e2c6..66d5b64c0 100644
--- a/src/hb-wasm-api.h
+++ b/src/hb-wasm-api.h
@@ -140,7 +140,18 @@ typedef struct font_t font_t;
 HB_WASM_API (ptr_t(face_t), font_get_face) (HB_WASM_EXEC_ENV
 					    ptr_t(font_t));
 
+HB_WASM_API (hb_codepoint_t, font_get_glyph) (HB_WASM_EXEC_ENV
+					      ptr_t(font_t),
+					      hb_codepoint_t unicode,
+					      hb_codepoint_t variation_selector);
 
+HB_WASM_API (hb_position_t, font_get_glyph_h_advance) (HB_WASM_EXEC_ENV
+						       ptr_t(font_t),
+						       hb_codepoint_t glyph);
+
+HB_WASM_API (hb_position_t, font_get_glyph_v_advance) (HB_WASM_EXEC_ENV
+						       ptr_t(font_t),
+						       hb_codepoint_t glyph);
 /* shape interface */
 
 HB_WASM_INTERFACE (bool_t, shape) (HB_WASM_EXEC_ENV