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_PRIVATE_HH
28 #define HB_OT_SHAPE_NORMALIZE_PRIVATE_HH
29 
30 #include "hb-private.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_DEFAULT = HB_OT_SHAPE_NORMALIZATION_MODE_COMPOSED_DIACRITICS
45 };
46 
47 HB_INTERNAL void _hb_ot_shape_normalize (const hb_ot_shape_plan_t *shaper,
48 					 hb_buffer_t *buffer,
49 					 hb_font_t *font);
50 
51 
52 struct hb_ot_shape_normalize_context_t
53 {
54   const hb_ot_shape_plan_t *plan;
55   hb_buffer_t *buffer;
56   hb_font_t *font;
57   hb_unicode_funcs_t *unicode;
58   bool (*decompose) (const hb_ot_shape_normalize_context_t *c,
59 		     hb_codepoint_t  ab,
60 		     hb_codepoint_t *a,
61 		     hb_codepoint_t *b);
62   bool (*compose) (const hb_ot_shape_normalize_context_t *c,
63 		   hb_codepoint_t  a,
64 		   hb_codepoint_t  b,
65 		   hb_codepoint_t *ab);
66 };
67 
68 
69 #endif /* HB_OT_SHAPE_NORMALIZE_PRIVATE_HH */
70