1 /*

     2  * Copyright © 2012  Google, Inc.

     3  *

     4  *  This is part of HarfBuzz, a text shaping library.

     5  *

     6  * Permission is hereby granted, without written agreement and without

     7  * license or royalty fees, to use, copy, modify, and distribute this

     8  * software and its documentation for any purpose, provided that the

     9  * above copyright notice and the following two paragraphs appear in

    10  * all copies of this software.

    11  *

    12  * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR

    13  * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES

    14  * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN

    15  * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH

    16  * DAMAGE.

    17  *

    18  * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,

    19  * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND

    20  * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS

    21  * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO

    22  * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.

    23  *

    24  * Google Author(s): Behdad Esfahbod

    25  */

    26 

    27 #ifndef HB_OT_SHAPE_NORMALIZE_HH

    28 #define HB_OT_SHAPE_NORMALIZE_HH

    29 

    30 #include "hb.hh"

    31 

    32 

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

    34 #define glyph_index()   var1.u32

    35 

    36 struct hb_ot_shape_plan_t;

    37 

    38 enum hb_ot_shape_normalization_mode_t {

    39   HB_OT_SHAPE_NORMALIZATION_MODE_NONE,

    40   HB_OT_SHAPE_NORMALIZATION_MODE_DECOMPOSED,

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

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

    43 

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

    45   HB_OT_SHAPE_NORMALIZATION_MODE_DEFAULT = HB_OT_SHAPE_NORMALIZATION_MODE_AUTO

    46 };

    47 

    48 HB_INTERNAL void _hb_ot_shape_normalize (const hb_ot_shape_plan_t *shaper,

    49                                          hb_buffer_t *buffer,

    50                                          hb_font_t *font);

    51 

    52 

    53 struct hb_ot_shape_normalize_context_t

    54 {

    55   const hb_ot_shape_plan_t *plan;

    56   hb_buffer_t *buffer;

    57   hb_font_t *font;

    58   hb_unicode_funcs_t *unicode;

    59   bool (*decompose) (const hb_ot_shape_normalize_context_t *c,

    60                      hb_codepoint_t  ab,

    61                      hb_codepoint_t *a,

    62                      hb_codepoint_t *b);

    63   bool (*compose) (const hb_ot_shape_normalize_context_t *c,

    64                    hb_codepoint_t  a,

    65                    hb_codepoint_t  b,

    66                    hb_codepoint_t *ab);

    67 };

    68 

    69 

    70 #endif /* HB_OT_SHAPE_NORMALIZE_HH */