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1 /*
2  * Copyright © 2018  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_AAT_MAP_HH
28 #define HB_AAT_MAP_HH
29 
30 #include "hb.hh"
31 
32 
33 struct hb_aat_map_t
34 {
35   friend struct hb_aat_map_builder_t;
36 
37   public:
38 
inithb_aat_map_t39   void init ()
40   {
41     memset (this, 0, sizeof (*this));
42     chain_flags.init ();
43   }
finihb_aat_map_t44   void fini () { chain_flags.fini (); }
45 
46   public:
47   hb_vector_t<hb_mask_t, 1> chain_flags;
48 };
49 
50 struct hb_aat_map_builder_t
51 {
52   public:
53 
hb_aat_map_builder_thb_aat_map_builder_t54   HB_INTERNAL hb_aat_map_builder_t (hb_face_t *face_,
55 				    const hb_segment_properties_t *props_ HB_UNUSED) :
56 				      face (face_) {}
57 
58   HB_INTERNAL void add_feature (hb_tag_t tag, unsigned int value=1);
59 
60   HB_INTERNAL void compile (hb_aat_map_t  &m);
61 
62   public:
63   struct feature_info_t
64   {
65     hb_aat_layout_feature_type_t  type;
66     hb_aat_layout_feature_selector_t  setting;
67     unsigned  seq; /* For stable sorting only. */
68 
cmphb_aat_map_builder_t::feature_info_t69     static int cmp (const void *pa, const void *pb)
70     {
71       const feature_info_t *a = (const feature_info_t *) pa;
72       const feature_info_t *b = (const feature_info_t *) pb;
73       return (a->type != b->type) ? (a->type < b->type ? -1 : 1) :
74 	     (a->seq < b->seq ? -1 : a->seq > b->seq ? 1 : 0);
75     }
76 
cmphb_aat_map_builder_t::feature_info_t77     int cmp (unsigned int ty) const
78     {
79       return (type != ty) ? (type < ty ? -1 : 1) : 0;
80     }
81   };
82 
83   public:
84   hb_face_t *face;
85 
86   public:
87   hb_vector_t<feature_info_t, 32> features;
88 };
89 
90 
91 #endif /* HB_AAT_MAP_HH */
92