Imported Upstream version 1.7.6

[platform/upstream/harfbuzz.git] / src / hb-face.cc

diff --git a/src/hb-face.cc b/src/hb-face.cc
index 1800c99..d8af8c1 100644 (file)
--- a/src/hb-face.cc
+++ b/src/hb-face.cc
@@ -43,23 +43,21 @@ const hb_face_t _hb_face_nil = {
 
   true, /* immutable */
 
-  NULL, /* reference_table_func */
-  NULL, /* user_data */
-  NULL, /* destroy */
+  nullptr, /* reference_table_func */
+  nullptr, /* user_data */
+  nullptr, /* destroy */
 
   0,    /* index */
   1000, /* upem */
   0,    /* num_glyphs */
 
-  hb_face_t::NOTHING, /* dirty */
-
   {
 #define HB_SHAPER_IMPLEMENT(shaper) HB_SHAPER_DATA_INVALID,
 #include "hb-shaper-list.hh"
 #undef HB_SHAPER_IMPLEMENT
   },
 
-  NULL, /* shape_plans */
+  nullptr, /* shape_plans */
 };
 
 
@@ -111,7 +109,7 @@ _hb_face_for_data_closure_create (hb_blob_t *blob, unsigned int index)
 
   closure = (hb_face_for_data_closure_t *) calloc (1, sizeof (hb_face_for_data_closure_t));
   if (unlikely (!closure))
-    return NULL;
+    return nullptr;
 
   closure->blob = blob;
   closure->index = index;
@@ -120,8 +118,10 @@ _hb_face_for_data_closure_create (hb_blob_t *blob, unsigned int index)
 }
 
 static void
-_hb_face_for_data_closure_destroy (hb_face_for_data_closure_t *closure)
+_hb_face_for_data_closure_destroy (void *data)
 {
+  hb_face_for_data_closure_t *closure = (hb_face_for_data_closure_t *) data;
+
   hb_blob_destroy (closure->blob);
   free (closure);
 }
@@ -164,14 +164,14 @@ hb_face_create (hb_blob_t    *blob,
   if (unlikely (!blob))
     blob = hb_blob_get_empty ();
 
-  hb_face_for_data_closure_t *closure = _hb_face_for_data_closure_create (OT::Sanitizer<OT::OpenTypeFontFile>::sanitize (hb_blob_reference (blob)), index);
+  hb_face_for_data_closure_t *closure = _hb_face_for_data_closure_create (OT::Sanitizer<OT::OpenTypeFontFile>().sanitize (hb_blob_reference (blob)), index);
 
   if (unlikely (!closure))
     return hb_face_get_empty ();
 
   face = hb_face_create_for_tables (_hb_face_for_data_reference_table,
                                    closure,
-                                   (hb_destroy_func_t) _hb_face_for_data_closure_destroy);
+                                   _hb_face_for_data_closure_destroy);
 
   face->index = index;
 
@@ -367,11 +367,6 @@ hb_face_set_index (hb_face_t    *face,
   if (face->immutable)
     return;
 
-  if (face->index == index)
-    return;
-
-  face->dirty |= face->INDEX;
-
   face->index = index;
 }
 
@@ -407,11 +402,6 @@ hb_face_set_upem (hb_face_t    *face,
   if (face->immutable)
     return;
 
-  if (face->upem == upem)
-    return;
-
-  face->dirty |= face->UPEM;
-
   face->upem = upem;
 }
 
@@ -434,7 +424,7 @@ hb_face_get_upem (hb_face_t *face)
 void
 hb_face_t::load_upem (void) const
 {
-  hb_blob_t *head_blob = OT::Sanitizer<OT::head>::sanitize (reference_table (HB_OT_TAG_head));
+  hb_blob_t *head_blob = OT::Sanitizer<OT::head>().sanitize (reference_table (HB_OT_TAG_head));
   const OT::head *head_table = OT::Sanitizer<OT::head>::lock_instance (head_blob);
   upem = head_table->get_upem ();
   hb_blob_destroy (head_blob);
@@ -456,11 +446,6 @@ hb_face_set_glyph_count (hb_face_t    *face,
   if (face->immutable)
     return;
 
-  if (face->num_glyphs == glyph_count)
-    return;
-
-  face->dirty |= face->NUM_GLYPHS;
-
   face->num_glyphs = glyph_count;
 }
 
@@ -483,10 +468,39 @@ hb_face_get_glyph_count (hb_face_t *face)
 void
 hb_face_t::load_num_glyphs (void) const
 {
-  hb_blob_t *maxp_blob = OT::Sanitizer<OT::maxp>::sanitize (reference_table (HB_OT_TAG_maxp));
+  hb_blob_t *maxp_blob = OT::Sanitizer<OT::maxp>().sanitize (reference_table (HB_OT_TAG_maxp));
   const OT::maxp *maxp_table = OT::Sanitizer<OT::maxp>::lock_instance (maxp_blob);
   num_glyphs = maxp_table->get_num_glyphs ();
   hb_blob_destroy (maxp_blob);
 }
 
+/**
+ * hb_face_get_table_tags:
+ * @face: a face.
+ *
+ * Retrieves table tags for a face, if possible.
+ *
+ * Return value: total number of tables, or 0 if not possible to list.
+ *
+ * Since: 1.6.0
+ **/
+unsigned int
+hb_face_get_table_tags (hb_face_t    *face,
+                       unsigned int  start_offset,
+                       unsigned int *table_count, /* IN/OUT */
+                       hb_tag_t     *table_tags /* OUT */)
+{
+  if (face->destroy != _hb_face_for_data_closure_destroy)
+  {
+    if (table_count)
+      *table_count = 0;
+    return 0;
+  }
+
+  hb_face_for_data_closure_t *data = (hb_face_for_data_closure_t *) face->user_data;
+
+  const OT::OpenTypeFontFile &ot_file = *OT::Sanitizer<OT::OpenTypeFontFile>::lock_instance (data->blob);
+  const OT::OpenTypeFontFace &ot_face = ot_file.get_face (data->index);
 
+  return ot_face.get_table_tags (start_offset, table_count, table_tags);
+}