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+/*
+ * 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
+ * all copies of this software.
+ *
+ * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
+ * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
+ * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
+ * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ *
+ * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
+ * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
+ * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
+ * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
+ *
+ * Red Hat Author(s): Behdad Esfahbod
+ * Google Author(s): Behdad Esfahbod
+ */
+
+#ifndef HB_FACE_HH
+#define HB_FACE_HH
+
+#include "hb.hh"
+
+#include "hb-shaper.hh"
+#include "hb-shape-plan.hh"
+#include "hb-ot-face.hh"
+
+
+/*
+ * hb_face_t
+ */
+
+#define HB_SHAPER_IMPLEMENT(shaper) HB_SHAPER_DATA_INSTANTIATE_SHAPERS(shaper, face);
+#include "hb-shaper-list.hh"
+#undef HB_SHAPER_IMPLEMENT
+
+struct hb_face_t
+{
+ hb_object_header_t header;
+
+ hb_reference_table_func_t reference_table_func;
+ void *user_data;
+ hb_destroy_func_t destroy;
+
+ unsigned int index; /* Face index in a collection, zero-based. */
+ mutable hb_atomic_int_t upem; /* Units-per-EM. */
+ mutable hb_atomic_int_t num_glyphs; /* Number of glyphs. */
+
+ hb_shaper_object_dataset_t<hb_face_t> data;/* Various shaper data. */
+ hb_ot_face_t table; /* All the face's tables. */
+
+ /* Cache */
+ struct plan_node_t
+ {
+ hb_shape_plan_t *shape_plan;
+ plan_node_t *next;
+ };
+ hb_atomic_ptr_t<plan_node_t> shape_plans;
+
+ hb_blob_t *reference_table (hb_tag_t tag) const
+ {
+ hb_blob_t *blob;
+
+ if (unlikely (!reference_table_func))
+ return hb_blob_get_empty ();
+
+ blob = reference_table_func (/*XXX*/const_cast<hb_face_t *> (this), tag, user_data);
+ if (unlikely (!blob))
+ return hb_blob_get_empty ();
+
+ return blob;
+ }
+
+ unsigned int get_upem () const
+ {
+ unsigned int ret = upem;
+ if (unlikely (!ret))
+ {
+ return load_upem ();
+ }
+ return ret;
+ }
+
+ unsigned int get_num_glyphs () const
+ {
+ unsigned int ret = num_glyphs;
+ if (unlikely (ret == UINT_MAX))
+ return load_num_glyphs ();
+ return ret;
+ }
+
+ private:
+ HB_INTERNAL unsigned int load_upem () const;
+ HB_INTERNAL unsigned int load_num_glyphs () const;
+};
+DECLARE_NULL_INSTANCE (hb_face_t);
+
+
+#endif /* HB_FACE_HH */