From fe557e2f21108181496b8f23c92595e0d24d7d20 Mon Sep 17 00:00:00 2001
From: Behdad Esfahbod <behdad@behdad.org>
Date: Fri, 24 Feb 2023 12:20:31 -0700
Subject: [PATCH] [wasm-api] Bind font_get_glyph_extents

Untested.
---
 src/hb-wasm-api-font.hh | 17 +++++++++++++++++
 src/hb-wasm-api-list.hh |  1 +
 src/hb-wasm-api.h       | 12 ++++++++++++
 3 files changed, 30 insertions(+)

diff --git a/src/hb-wasm-api-font.hh b/src/hb-wasm-api-font.hh
index 319814cea..b4b0548dd 100644
--- a/src/hb-wasm-api-font.hh
+++ b/src/hb-wasm-api-font.hh
@@ -88,6 +88,23 @@ font_get_glyph_v_advance (HB_WASM_EXEC_ENV
   return hb_font_get_glyph_v_advance (font, glyph);
 }
 
+static_assert (sizeof (glyph_extents_t) == sizeof (hb_glyph_extents_t), "");
+
+bool_t
+font_get_glyph_extents (HB_WASM_EXEC_ENV
+			ptr_t(font_t) fontref,
+			codepoint_t glyph,
+			ptr_t(glyph_extents_t) extentsptr)
+{
+  HB_REF2OBJ (font);
+  HB_OUT_PARAM (glyph_extents_t, extents);
+  if (unlikely (!extents))
+    return false;
+
+  return hb_font_get_glyph_extents (font, glyph,
+				    (hb_glyph_extents_t *) extents);
+}
+
 void
 font_glyph_to_string (HB_WASM_EXEC_ENV
 		      ptr_t(font_t) fontref,
diff --git a/src/hb-wasm-api-list.hh b/src/hb-wasm-api-list.hh
index f3cb29f76..475bf06e2 100644
--- a/src/hb-wasm-api-list.hh
+++ b/src/hb-wasm-api-list.hh
@@ -73,6 +73,7 @@ static NativeSymbol _hb_wasm_native_symbols[] =
   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),
+  NATIVE_SYMBOL ("(iii)i",	font_get_glyph_extents),
   NATIVE_SYMBOL ("(ii$*)",	font_glyph_to_string),
 
   /* shape */
diff --git a/src/hb-wasm-api.h b/src/hb-wasm-api.h
index 2180b882a..622398f24 100644
--- a/src/hb-wasm-api.h
+++ b/src/hb-wasm-api.h
@@ -191,6 +191,18 @@ HB_WASM_API (position_t, font_get_glyph_v_advance) (HB_WASM_EXEC_ENV
 						    ptr_t(font_t),
 						    codepoint_t glyph);
 
+typedef struct {
+  position_t x_bearing;
+  position_t y_bearing;
+  position_t width;
+  position_t height;
+} glyph_extents_t;
+
+HB_WASM_API (bool_t, font_get_glyph_extents) (HB_WASM_EXEC_ENV
+					      ptr_t(font_t),
+					      codepoint_t glyph,
+					      ptr_t(glyph_extents_t) extents);
+
 HB_WASM_API (void, font_glyph_to_string) (HB_WASM_EXEC_ENV
 					  ptr_t(font_t),
 					  codepoint_t glyph,