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 /*

  * 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

  * 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

  */

 #include "hb-private.hh"

 #include "hb-ot-layout-private.hh"

 #include "hb-font-private.hh"

 #include "hb-open-file-private.hh"

 #include "hb-ot-head-table.hh"

 #include "hb-ot-maxp-table.hh"

 #include "hb-cache-private.hh"

 #include <string.h>

 /*

  * hb_face_t

  */

 const hb_face_t _hb_face_nil = {

   HB_OBJECT_HEADER_STATIC,

   true, /* immutable */

   NULL, /* reference_table_func */

   NULL, /* user_data */

   NULL, /* destroy */

   0,    /* index */

   1000, /* upem */

   0,    /* num_glyphs */

   {

 #define HB_SHAPER_IMPLEMENT(shaper) HB_SHAPER_DATA_INVALID,

 #include "hb-shaper-list.hh"

 #undef HB_SHAPER_IMPLEMENT

   },

   NULL, /* shape_plans */

 };

 /**

  * hb_face_create_for_tables:

  * @reference_table_func: (closure user_data) (destroy destroy) (scope notified):

  * @user_data: 

  * @destroy: 

  *

  * 

  *

  * Return value: (transfer full)

  *

  * Since: 1.0

  **/

 hb_face_t *

 hb_face_create_for_tables (hb_reference_table_func_t  reference_table_func,

 			   void                      *user_data,

 			   hb_destroy_func_t          destroy)

 {

   hb_face_t *face;

   if (!reference_table_func || !(face = hb_object_create<hb_face_t> ())) {

     if (destroy)

       destroy (user_data);

     return hb_face_get_empty ();

   }

   face->reference_table_func = reference_table_func;

   face->user_data = user_data;

   face->destroy = destroy;

   face->upem = 0;

   face->num_glyphs = (unsigned int) -1;

   return face;

 }

 typedef struct hb_face_for_data_closure_t {

   hb_blob_t *blob;

   unsigned int  index;

 } hb_face_for_data_closure_t;

 static hb_face_for_data_closure_t *

 _hb_face_for_data_closure_create (hb_blob_t *blob, unsigned int index)

 {

   hb_face_for_data_closure_t *closure;

   closure = (hb_face_for_data_closure_t *) malloc (sizeof (hb_face_for_data_closure_t));

   if (unlikely (!closure))

     return NULL;

   closure->blob = blob;

   closure->index = index;

   return closure;

 }

 static void

 _hb_face_for_data_closure_destroy (hb_face_for_data_closure_t *closure)

 {

   hb_blob_destroy (closure->blob);

   free (closure);

 }

 static hb_blob_t *

 _hb_face_for_data_reference_table (hb_face_t *face HB_UNUSED, hb_tag_t tag, void *user_data)

 {

   hb_face_for_data_closure_t *data = (hb_face_for_data_closure_t *) user_data;

   if (tag == HB_TAG_NONE)

     return hb_blob_reference (data->blob);

   const OT::OpenTypeFontFile &ot_file = *OT::Sanitizer<OT::OpenTypeFontFile>::lock_instance (data->blob);

   const OT::OpenTypeFontFace &ot_face = ot_file.get_face (data->index);

   const OT::OpenTypeTable &table = ot_face.get_table_by_tag (tag);

   hb_blob_t *blob = hb_blob_create_sub_blob (data->blob, table.offset, table.length);

   return blob;

 }

 /**

  * hb_face_create: (Xconstructor)

  * @blob: 

  * @index: 

  *

  * 

  *

  * Return value: (transfer full):

  *

  * Since: 1.0

  **/

 hb_face_t *

 hb_face_create (hb_blob_t    *blob,

 		unsigned int  index)

 {

   hb_face_t *face;

   if (unlikely (!blob || !hb_blob_get_length (blob)))

     return hb_face_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);

   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_set_index (face, index);

   return face;

 }

 /**

  * hb_face_get_empty:

  *

  * 

  *

  * Return value: (transfer full)

  *

  * Since: 1.0

  **/

 hb_face_t *

 hb_face_get_empty (void)

 {

   return const_cast<hb_face_t *> (&_hb_face_nil);

 }

 /**

  * hb_face_reference: (skip)

  * @face: a face.

  *

  * 

  *

  * Return value: 

  *

  * Since: 1.0

  **/

 hb_face_t *

 hb_face_reference (hb_face_t *face)

 {

   return hb_object_reference (face);

 }

 /**

  * hb_face_destroy: (skip)

  * @face: a face.

  *

  * 

  *

  * Since: 1.0

  **/

 void

 hb_face_destroy (hb_face_t *face)

 {

   if (!hb_object_destroy (face)) return;

   for (hb_face_t::plan_node_t *node = face->shape_plans; node; )

   {

     hb_face_t::plan_node_t *next = node->next;

     hb_shape_plan_destroy (node->shape_plan);

     free (node);

     node = next;

   }

 #define HB_SHAPER_IMPLEMENT(shaper) HB_SHAPER_DATA_DESTROY(shaper, face);

 #include "hb-shaper-list.hh"

 #undef HB_SHAPER_IMPLEMENT

   if (face->destroy)

     face->destroy (face->user_data);

   free (face);

 }

 /**

  * hb_face_set_user_data: (skip)

  * @face: a face.

  * @key: 

  * @data: 

  * @destroy: 

  * @replace: 

  *

  * 

  *

  * Return value: 

  *

  * Since: 1.0

  **/

 hb_bool_t

 hb_face_set_user_data (hb_face_t          *face,

 		       hb_user_data_key_t *key,

 		       void *              data,

 		       hb_destroy_func_t   destroy,

 		       hb_bool_t           replace)

 {

   return hb_object_set_user_data (face, key, data, destroy, replace);

 }

 /**

  * hb_face_get_user_data: (skip)

  * @face: a face.

  * @key: 

  *

  * 

  *

  * Return value: (transfer none):

  *

  * Since: 1.0

  **/

 void *

 hb_face_get_user_data (hb_face_t          *face,

 		       hb_user_data_key_t *key)

 {

   return hb_object_get_user_data (face, key);

 }

 /**

  * hb_face_make_immutable:

  * @face: a face.

  *

  * 

  *

  * Since: 1.0

  **/

 void

 hb_face_make_immutable (hb_face_t *face)

 {

   if (hb_object_is_inert (face))

     return;

   face->immutable = true;

 }

 /**

  * hb_face_is_immutable:

  * @face: a face.

  *

  * 

  *

  * Return value: 

  *

  * Since: 1.0

  **/

 hb_bool_t

 hb_face_is_immutable (hb_face_t *face)

 {

   return face->immutable;

 }

 /**

  * hb_face_reference_table:

  * @face: a face.

  * @tag: 

  *

  * 

  *

  * Return value: (transfer full):

  *

  * Since: 1.0

  **/

 hb_blob_t *

 hb_face_reference_table (hb_face_t *face,

 			 hb_tag_t   tag)

 {

   return face->reference_table (tag);

 }

 /**

  * hb_face_reference_blob:

  * @face: a face.

  *

  * 

  *

  * Return value: (transfer full):

  *

  * Since: 1.0

  **/

 hb_blob_t *

 hb_face_reference_blob (hb_face_t *face)

 {

   return face->reference_table (HB_TAG_NONE);

 }

 /**

  * hb_face_set_index:

  * @face: a face.

  * @index: 

  *

  * 

  *

  * Since: 1.0

  **/

 void

 hb_face_set_index (hb_face_t    *face,

 		   unsigned int  index)

 {

   if (hb_object_is_inert (face))

     return;

   face->index = index;

 }

 /**

  * hb_face_get_index:

  * @face: a face.

  *

  * 

  *

  * Return value: 

  *

  * Since: 1.0

  **/

 unsigned int

 hb_face_get_index (hb_face_t    *face)

 {

   return face->index;

 }

 /**

  * hb_face_set_upem:

  * @face: a face.

  * @upem: 

  *

  * 

  *

  * Since: 1.0

  **/

 void

 hb_face_set_upem (hb_face_t    *face,

 		  unsigned int  upem)

 {

   if (hb_object_is_inert (face))

     return;

   face->upem = upem;

 }

 /**

  * hb_face_get_upem:

  * @face: a face.

  *

  * 

  *

  * Return value: 

  *

  * Since: 1.0

  **/

 unsigned int

 hb_face_get_upem (hb_face_t *face)

 {

   return face->get_upem ();

 }

 void

 hb_face_t::load_upem (void) const

 {

   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);

 }

 /**

  * hb_face_set_glyph_count:

  * @face: a face.

  * @glyph_count: 

  *

  * 

  *

  * Since: 1.0

  **/

 void

 hb_face_set_glyph_count (hb_face_t    *face,

 			 unsigned int  glyph_count)

 {

   if (hb_object_is_inert (face))

     return;

   face->num_glyphs = glyph_count;

 }

 /**

  * hb_face_get_glyph_count:

  * @face: a face.

  *

  * 

  *

  * Return value: 

  *

  * Since: 1.0

  **/

 unsigned int

 hb_face_get_glyph_count (hb_face_t *face)

 {

   return face->get_num_glyphs ();

 }

 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));

   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);

 }