Roll harfbuzz-ng 3b8fd9c48f4bde368bf2d465c148b9743a9216ee

third_party/harfbuzz-ng/src/hb-ft.cc

 /*
  * Copyright © 2009  Red Hat, Inc.
  * Copyright © 2009  Keith Stribley
  *
  *  This is part of HarfBuzz, a text shaping library.
  *
  * Permission is hereby granted, without written agreement and without
  * license or royalty fees, to use, copy, modify, and distribute this
  * software and its documentation for any purpose, provided that the
  * above copyright notice and the following two paragraphs appear in
@@ skipping 43 matching lines @@
  *   - We don't handle / allow for emboldening / obliqueing.
  *
  *   - Rounding, etc?
  *
  *   - In the future, we should add constructors to create fonts in font space.
  *
  *   - I believe transforms are not correctly implemented.  FreeType does not
  *     provide any API to get to the transform/delta set on the face. :(
  *
  *   - Always use FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH?
+ *
+ *   - FT_Load_Glyph() is exteremely costly.  Do something about it?
  */
 
 
 static hb_bool_t
 hb_ft_get_glyph (hb_font_t *font HB_UNUSED,
                  void *font_data,
                  hb_codepoint_t unicode,
                  hb_codepoint_t variation_selector,
                  hb_codepoint_t *glyph,
                  void *user_data HB_UNUSED)
@@ skipping 148 matching lines @@
 
   if (unlikely (point_index >= (unsigned int) ft_face->glyph->outline.n_points))
       return FALSE;
 
   *x = ft_face->glyph->outline.points[point_index].x;
   *y = ft_face->glyph->outline.points[point_index].y;
 
   return TRUE;
 }
 
+static hb_bool_t
+hb_ft_get_glyph_name (hb_font_t *font,
+                      void *font_data,
+                      hb_codepoint_t glyph,
+                      char *name, unsigned int size,
+                      void *user_data HB_UNUSED)
+{
+  FT_Face ft_face = (FT_Face) font_data;
+
+  hb_bool_t ret = !FT_Get_Glyph_Name (ft_face, glyph, name, size);
+  if (!ret)
+    snprintf (name, size, "gid%u", glyph);
+
+  return ret;
+}
+
+static hb_bool_t
+hb_ft_get_glyph_from_name (hb_font_t *font,
+                           void *font_data,
+                           const char *name, int len, /* -1 means nul-terminated */
+                           hb_codepoint_t *glyph,
+                           void *user_data HB_UNUSED)
+{
+  FT_Face ft_face = (FT_Face) font_data;
+
+  if (len < 0)
+    *glyph = FT_Get_Name_Index (ft_face, (FT_String *) name);
+  else {
+    /* Make a nul-terminated version. */
+    char buf[128];
+    len = MIN (len, (int) sizeof (buf) - 1);
+    strncpy (buf, name, len);
+    buf[len] = '\0';
+    *glyph = FT_Get_Name_Index (ft_face, buf);
+  }
+
+  return *glyph != 0;
+}
+
+
 static hb_font_funcs_t ft_ffuncs = {
   HB_OBJECT_HEADER_STATIC,
 
   TRUE, /* immutable */
 
   {
-    hb_ft_get_glyph,
-    hb_ft_get_glyph_h_advance,
-    hb_ft_get_glyph_v_advance,
-    hb_ft_get_glyph_h_origin,
-    hb_ft_get_glyph_v_origin,
-    hb_ft_get_glyph_h_kerning,
-    hb_ft_get_glyph_v_kerning,
-    hb_ft_get_glyph_extents,
-    hb_ft_get_glyph_contour_point,
+#define HB_FONT_FUNC_IMPLEMENT(name) hb_ft_get_##name,
+    HB_FONT_FUNCS_IMPLEMENT_CALLBACKS
+#undef HB_FONT_FUNC_IMPLEMENT
   }
 };
 
 static hb_font_funcs_t *
 _hb_ft_get_font_funcs (void)
 {
   return &ft_ffuncs;
 }
 
 
@@ skipping 173 matching lines @@
 
 FT_Face
 hb_ft_font_get_face (hb_font_t *font)
 {
   if (font->destroy == (hb_destroy_func_t) FT_Done_Face ||
       font->destroy == (hb_destroy_func_t) _do_nothing)
     return (FT_Face) font->user_data;
 
   return NULL;
 }