Roll HarfBuzz to 1.1.3

third_party/harfbuzz-ng/src/hb-font-private.hh

 /*
  * Copyright © 2009  Red Hat, Inc.
  * Copyright © 2011  Google, Inc.
  *
  *  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 24 matching lines @@
 #include "hb-face-private.hh"
 #include "hb-shaper-private.hh"
 
 
 
 /*
  * hb_font_funcs_t
  */
 
 #define HB_FONT_FUNCS_IMPLEMENT_CALLBACKS \
+  HB_FONT_FUNC_IMPLEMENT (font_h_extents) \
+  HB_FONT_FUNC_IMPLEMENT (font_v_extents) \
   HB_FONT_FUNC_IMPLEMENT (glyph) \
   HB_FONT_FUNC_IMPLEMENT (glyph_h_advance) \
   HB_FONT_FUNC_IMPLEMENT (glyph_v_advance) \
   HB_FONT_FUNC_IMPLEMENT (glyph_h_origin) \
   HB_FONT_FUNC_IMPLEMENT (glyph_v_origin) \
   HB_FONT_FUNC_IMPLEMENT (glyph_h_kerning) \
   HB_FONT_FUNC_IMPLEMENT (glyph_v_kerning) \
   HB_FONT_FUNC_IMPLEMENT (glyph_extents) \
   HB_FONT_FUNC_IMPLEMENT (glyph_contour_point) \
   HB_FONT_FUNC_IMPLEMENT (glyph_name) \
@@ skipping 18 matching lines @@
 #undef HB_FONT_FUNC_IMPLEMENT
   } destroy;
 
   /* Don't access these directly.  Call font->get_*() instead. */
   union get_t {
     struct get_funcs_t {
 #define HB_FONT_FUNC_IMPLEMENT(name) hb_font_get_##name##_func_t name;
       HB_FONT_FUNCS_IMPLEMENT_CALLBACKS
 #undef HB_FONT_FUNC_IMPLEMENT
     } f;
-    void (*array[]) (void);
+    void (*array[VAR]) (void);
   } get;
 };
 
 
 
 /*
  * hb_font_t
  */
 
 struct hb_font_t {
@@ skipping 59 matching lines @@
   bool \
   has_##name##_func (void) \
   { \
     hb_font_funcs_t *funcs = this->klass; \
     unsigned int i = offsetof (hb_font_funcs_t::get_t::get_funcs_t, name) / sizeof (funcs->get.array[0]); \
     return has_func (i); \
   }
   HB_FONT_FUNCS_IMPLEMENT_CALLBACKS
 #undef HB_FONT_FUNC_IMPLEMENT
 
-  inline hb_bool_t has_glyph (hb_codepoint_t unicode)
+  inline hb_bool_t get_font_h_extents (hb_font_extents_t *extents)
+  {
+    memset (extents, 0, sizeof (*extents));
+    return klass->get.f.font_h_extents (this, user_data,
+                                        extents,
+                                        klass->user_data.font_h_extents);
+  }
+  inline hb_bool_t get_font_v_extents (hb_font_extents_t *extents)
+  {
+    memset (extents, 0, sizeof (*extents));
+    return klass->get.f.font_v_extents (this, user_data,
+                                        extents,
+                                        klass->user_data.font_v_extents);
+  }
+
+  inline bool has_glyph (hb_codepoint_t unicode)
   {
     hb_codepoint_t glyph;
     return get_glyph (unicode, 0, &glyph);
   }
 
   inline hb_bool_t get_glyph (hb_codepoint_t unicode, hb_codepoint_t variation_selector,
                               hb_codepoint_t *glyph)
   {
     *glyph = 0;
     return klass->get.f.glyph (this, user_data,
@@ skipping 84 matching lines @@
     if (len == -1) len = strlen (name);
     return klass->get.f.glyph_from_name (this, user_data,
                                          name, len,
                                          glyph,
                                          klass->user_data.glyph_from_name);
   }
 
 
   /* A bit higher-level, and with fallback */
 
+  inline void get_extents_for_direction (hb_direction_t direction,
+                                         hb_font_extents_t *extents)
+  {
+    if (likely (HB_DIRECTION_IS_HORIZONTAL (direction))) {
+      if (!get_font_h_extents (extents))
+      {
+        extents->ascender = y_scale * .8;
+        extents->descender = y_scale - extents->ascender;
+        extents->line_gap = 0;
+      }
+    } else {
+      if (!get_font_v_extents (extents))
+      {
+        extents->ascender = x_scale / 2;
+        extents->descender = x_scale - extents->ascender;
+        extents->line_gap = 0;
+      }
+    }
+  }
+
   inline void get_glyph_advance_for_direction (hb_codepoint_t glyph,
                                                hb_direction_t direction,
                                                hb_position_t *x, hb_position_t *y)
   {
     if (likely (HB_DIRECTION_IS_HORIZONTAL (direction))) {
       *x = get_glyph_h_advance (glyph);
       *y = 0;
     } else {
       *x = 0;
       *y = get_glyph_v_advance (glyph);
     }
   }
 
   /* Internal only */
   inline void guess_v_origin_minus_h_origin (hb_codepoint_t glyph,
                                              hb_position_t *x, hb_position_t *y)
   {
     *x = get_glyph_h_advance (glyph) / 2;
 
-    /* TODO use font_metrics.ascent */
+    /* TODO use font_extents.ascender */
     *y = y_scale;
   }
 
   inline void get_glyph_origin_for_direction (hb_codepoint_t glyph,
                                               hb_direction_t direction,
                                               hb_position_t *x, hb_position_t *y)
   {
     if (likely (HB_DIRECTION_IS_HORIZONTAL (direction)))
     {
       if (!get_glyph_h_origin (glyph, x, y) &&
@@ skipping 164 matching lines @@
 };
 
 #define HB_SHAPER_DATA_CREATE_FUNC_EXTRA_ARGS
 #define HB_SHAPER_IMPLEMENT(shaper) HB_SHAPER_DATA_PROTOTYPE(shaper, font);
 #include "hb-shaper-list.hh"
 #undef HB_SHAPER_IMPLEMENT
 #undef HB_SHAPER_DATA_CREATE_FUNC_EXTRA_ARGS
 
 
 #endif /* HB_FONT_PRIVATE_HH */