/*

 * 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-face-private.hh"

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

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

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

/*

 * 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 */

  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 */

};

/**

 * hb_face_create_for_tables:

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

 * @user_data: 

 * @destroy: 

 *

 * 

 *

 * Return value: (transfer full)

 *

 * Since: 0.9.2

 **/

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 *) calloc (1, 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: 0.9.2

 **/

hb_face_t *

hb_face_create (hb_blob_t    *blob,

		unsigned int  index)

{

  hb_face_t *face;

  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);

  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);

  face->index = index;

  return face;

}

/**

 * hb_face_get_empty:

 *

 * 

 *

 * Return value: (transfer full)

 *

 * Since: 0.9.2

 **/

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: 0.9.2

 **/

hb_face_t *

hb_face_reference (hb_face_t *face)

{

  return hb_object_reference (face);

}

/**

 * hb_face_destroy: (skip)

 * @face: a face.

 *

 * 

 *

 * Since: 0.9.2

 **/

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: 0.9.2

 **/

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: 0.9.2

 **/

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: 0.9.2

 **/

void

hb_face_make_immutable (hb_face_t *face)

{

  if (unlikely (hb_object_is_inert (face)))

    return;

  face->immutable = true;

}

/**

 * hb_face_is_immutable:

 * @face: a face.

 *

 * 

 *

 * Return value: 

 *

 * Since: 0.9.2

 **/

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: 0.9.2

 **/

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: 0.9.2

 **/

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: 0.9.2

 **/

void

hb_face_set_index (hb_face_t    *face,

		   unsigned int  index)

{

  if (face->immutable)

    return;

  if (face->index == index)

    return;

  face->dirty |= face->INDEX;

  face->index = index;

}

/**

 * hb_face_get_index:

 * @face: a face.

 *

 * 

 *

 * Return value: 

 *

 * Since: 0.9.2

 **/

unsigned int

hb_face_get_index (hb_face_t    *face)

{

  return face->index;

}

/**

 * hb_face_set_upem:

 * @face: a face.

 * @upem: 

 *

 * 

 *

 * Since: 0.9.2

 **/

void

hb_face_set_upem (hb_face_t    *face,

		  unsigned int  upem)

{

  if (face->immutable)

    return;

  if (face->upem == upem)

    return;

  face->dirty |= face->UPEM;

  face->upem = upem;

}

/**

 * hb_face_get_upem:

 * @face: a face.

 *

 * 

 *

 * Return value: 

 *

 * Since: 0.9.2

 **/

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: 0.9.7

 **/

void

hb_face_set_glyph_count (hb_face_t    *face,

			 unsigned int  glyph_count)

{

  if (face->immutable)

    return;

  if (face->num_glyphs == glyph_count)

    return;

  face->dirty |= face->NUM_GLYPHS;

  face->num_glyphs = glyph_count;

}

/**

 * hb_face_get_glyph_count:

 * @face: a face.

 *

 * 

 *

 * Return value: 

 *

 * Since: 0.9.7

 **/

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);

}