/*

 * 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.

 *

 * Google Author(s): Behdad Esfahbod

 */

#ifndef HB_OT_SHAPE_NORMALIZE_HH

#define HB_OT_SHAPE_NORMALIZE_HH

#include "hb.hh"

/* buffer var allocations, used during the normalization process */

#define glyph_index() var1.u32

struct hb_ot_shape_plan_t;

enum hb_ot_shape_normalization_mode_t {

  HB_OT_SHAPE_NORMALIZATION_MODE_NONE,

  HB_OT_SHAPE_NORMALIZATION_MODE_DECOMPOSED,

  HB_OT_SHAPE_NORMALIZATION_MODE_COMPOSED_DIACRITICS, /* Never composes base-to-base */

  HB_OT_SHAPE_NORMALIZATION_MODE_COMPOSED_DIACRITICS_NO_SHORT_CIRCUIT, /* Always fully decomposes and then recompose back */

  HB_OT_SHAPE_NORMALIZATION_MODE_AUTO, /* See hb-ot-shape-normalize.cc for logic. */

  HB_OT_SHAPE_NORMALIZATION_MODE_DEFAULT = HB_OT_SHAPE_NORMALIZATION_MODE_AUTO

};

HB_INTERNAL void _hb_ot_shape_normalize (const hb_ot_shape_plan_t *shaper,

           hb_buffer_t *buffer,

           hb_font_t *font);

struct hb_ot_shape_normalize_context_t

{

  const hb_ot_shape_plan_t *plan;

  hb_buffer_t *buffer;

  hb_font_t *font;

  hb_unicode_funcs_t *unicode;

  const hb_codepoint_t not_found;

  bool (*decompose) (const hb_ot_shape_normalize_context_t *c,

         hb_codepoint_t  ab,

         hb_codepoint_t *a,

         hb_codepoint_t *b);

  bool (*compose) (const hb_ot_shape_normalize_context_t *c,

       hb_codepoint_t  a,

       hb_codepoint_t  b,

       hb_codepoint_t *ab);

};

#endif /* HB_OT_SHAPE_NORMALIZE_HH */