Roll HarfBuzz to 1.4.6

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

 /*
  * Copyright © 2009  Red Hat, Inc.
  * Copyright © 2012  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 1178 matching lines @@
     0, /* x_ppem */
     0, /* y_ppem */
 
     0, /* num_coords */
     NULL, /* coords */
 
     const_cast<hb_font_funcs_t *> (&_hb_font_funcs_nil), /* klass */
     NULL, /* user_data */
     NULL, /* destroy */
 
+    hb_font_t::NOTHING, /* dirty */
+
     {
 #define HB_SHAPER_IMPLEMENT(shaper) HB_SHAPER_DATA_INVALID,
 #include "hb-shaper-list.hh"
 #undef HB_SHAPER_IMPLEMENT
     }
   };
 
   return const_cast<hb_font_t *> (&_hb_font_nil);
 }
 
@@ skipping 132 matching lines @@
 void
 hb_font_set_parent (hb_font_t *font,
                     hb_font_t *parent)
 {
   if (font->immutable)
     return;
 
   if (!parent)
     parent = hb_font_get_empty ();
 
+  if (parent == font->parent)
+    return;
+
+  font->dirty |= font->PARENT;
+
   hb_font_t *old = font->parent;
 
   font->parent = hb_font_reference (parent);
 
   hb_font_destroy (old);
 }
 
 /**
  * hb_font_get_parent:
  * @font: a font.
  *
  * 
  *
  * Return value: (transfer none): 
  *
  * Since: 0.9.2
  **/
 hb_font_t *
 hb_font_get_parent (hb_font_t *font)
 {
   return font->parent;
 }
 
 /**
+ * hb_font_set_face:
+ * @font: a font.
+ * @face: new face.
+ *
+ * Sets font-face of @font.
+ *
+ * Since: 1.4.3
+ **/
+void
+hb_font_set_face (hb_font_t *font,
+                  hb_face_t *face)
+{
+  if (font->immutable)
+    return;
+
+  if (unlikely (!face))
+    face = hb_face_get_empty ();
+
+  if (font->face == face)
+    return;
+
+  font->dirty |= font->FACE;
+
+  hb_face_t *old = font->face;
+
+  font->face = hb_face_reference (face);
+
+  hb_face_destroy (old);
+}
+
+/**
  * hb_font_get_face:
  * @font: a font.
  *
  * 
  *
  * Return value: (transfer none): 
  *
  * Since: 0.9.2
  **/
 hb_face_t *
@@ skipping 25 matching lines @@
       destroy (font_data);
     return;
   }
 
   if (font->destroy)
     font->destroy (font->user_data);
 
   if (!klass)
     klass = hb_font_funcs_get_empty ();
 
+  font->dirty |= font->FUNCS;
+
   hb_font_funcs_reference (klass);
   hb_font_funcs_destroy (font->klass);
   font->klass = klass;
   font->user_data = font_data;
   font->destroy = destroy;
 }
 
 /**
  * hb_font_set_funcs_data:
  * @font: a font.
@@ skipping 35 matching lines @@
  * Since: 0.9.2
  **/
 void
 hb_font_set_scale (hb_font_t *font,
                    int x_scale,
                    int y_scale)
 {
   if (font->immutable)
     return;
 
+  if (font->x_scale == x_scale && font->y_scale == y_scale)
+    return;
+
+  font->dirty |= font->SCALE;
+
   font->x_scale = x_scale;
   font->y_scale = y_scale;
 }
 
 /**
  * hb_font_get_scale:
  * @font: a font.
  * @x_scale: (out): 
  * @y_scale: (out): 
  *
@@ skipping 21 matching lines @@
  * Since: 0.9.2
  **/
 void
 hb_font_set_ppem (hb_font_t *font,
                   unsigned int x_ppem,
                   unsigned int y_ppem)
 {
   if (font->immutable)
     return;
 
+  if (font->x_ppem == x_ppem && font->y_ppem == y_ppem)
+    return;
+
+  font->dirty |= font->PPEM;
+
   font->x_ppem = x_ppem;
   font->y_ppem = y_ppem;
 }
 
 /**
  * hb_font_get_ppem:
  * @font: a font.
  * @x_ppem: (out): 
  * @y_ppem: (out): 
  *
@@ skipping 12 matching lines @@
 
 /*
  * Variations
  */
 
 static void
 _hb_font_adopt_var_coords_normalized (hb_font_t *font,
                                       int *coords, /* 2.14 normalized */
                                       unsigned int coords_length)
 {
+  if (font->num_coords == coords_length &&
+      (coords_length == 0 ||
+       0 == memcmp (font->coords, coords, coords_length * sizeof (coords[0]))))
+  {
+    free (coords);
+    return;
+  }
+
+  font->dirty |= font->VARIATIONS;
+
   free (font->coords);
 
   font->coords = coords;
   font->num_coords = coords_length;
 }
 
 /**
  * hb_font_set_variations:
  *
  * Since: 1.4.2
@@ skipping 62 matching lines @@
   if (unlikely (coords_length && !copy))
     return;
 
   if (coords_length)
     memcpy (copy, coords, coords_length * sizeof (coords[0]));
 
   _hb_font_adopt_var_coords_normalized (font, copy, coords_length);
 }
 
 /**
- * hb_font_set_var_coords_normalized:
+ * hb_font_get_var_coords_normalized:
  *
  * Return value is valid as long as variation coordinates of the font
  * are not modified.
  *
  * Since: 1.4.2
  */
 const int *
 hb_font_get_var_coords_normalized (hb_font_t *font,
                                    unsigned int *length)
 {
@@ skipping 123 matching lines @@
                                         trampoline_destroy);
 
   trampoline_reference (&trampoline->closure);
   hb_font_funcs_set_variation_glyph_func (ffuncs,
                                           hb_font_get_variation_glyph_trampoline,
                                           trampoline,
                                           trampoline_destroy);
 }
 
 #endif /* HB_DISABLE_DEPRECATED */