hb-ot-shape-normalize.hh

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/*
 * 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 */