/src/harfbuzz/src/hb-aat-layout-ankr-table.hh
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1 | | /* |
2 | | * Copyright © 2018 Ebrahim Byagowi |
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 | | |
25 | | #ifndef HB_AAT_LAYOUT_ANKR_TABLE_HH |
26 | | #define HB_AAT_LAYOUT_ANKR_TABLE_HH |
27 | | |
28 | | #include "hb-aat-layout-common.hh" |
29 | | |
30 | | /* |
31 | | * ankr -- Anchor Point |
32 | | * https://developer.apple.com/fonts/TrueType-Reference-Manual/RM06/Chap6ankr.html |
33 | | */ |
34 | | #define HB_AAT_TAG_ankr HB_TAG('a','n','k','r') |
35 | | |
36 | | |
37 | | namespace AAT { |
38 | | |
39 | | using namespace OT; |
40 | | |
41 | | |
42 | | struct Anchor |
43 | | { |
44 | | bool sanitize (hb_sanitize_context_t *c) const |
45 | 0 | { |
46 | 0 | TRACE_SANITIZE (this); |
47 | 0 | return_trace (c->check_struct (this)); |
48 | 0 | } |
49 | | |
50 | | public: |
51 | | FWORD xCoordinate; |
52 | | FWORD yCoordinate; |
53 | | public: |
54 | | DEFINE_SIZE_STATIC (4); |
55 | | }; |
56 | | |
57 | | typedef Array32Of<Anchor> GlyphAnchors; |
58 | | |
59 | | struct ankr |
60 | | { |
61 | | static constexpr hb_tag_t tableTag = HB_AAT_TAG_ankr; |
62 | | |
63 | | const Anchor &get_anchor (hb_codepoint_t glyph_id, |
64 | | unsigned int i, |
65 | | unsigned int num_glyphs) const |
66 | 4.59k | { |
67 | 4.59k | const NNOffset16To<GlyphAnchors> *offset = (this+lookupTable).get_value (glyph_id, num_glyphs); |
68 | 4.59k | if (!offset) |
69 | 4.59k | return Null (Anchor); |
70 | 0 | const GlyphAnchors &anchors = &(this+anchorData) + *offset; |
71 | 0 | return anchors[i]; |
72 | 4.59k | } |
73 | | |
74 | | bool sanitize (hb_sanitize_context_t *c) const |
75 | 90 | { |
76 | 90 | TRACE_SANITIZE (this); |
77 | 90 | return_trace (likely (c->check_struct (this) && |
78 | 90 | version == 0 && |
79 | 90 | c->check_range (this, anchorData) && |
80 | 90 | lookupTable.sanitize (c, this, &(this+anchorData)))); |
81 | 90 | } |
82 | | |
83 | | protected: |
84 | | HBUINT16 version; /* Version number (set to zero) */ |
85 | | HBUINT16 flags; /* Flags (currently unused; set to zero) */ |
86 | | Offset32To<Lookup<NNOffset16To<GlyphAnchors>>> |
87 | | lookupTable; /* Offset to the table's lookup table */ |
88 | | NNOffset32To<HBUINT8> |
89 | | anchorData; /* Offset to the glyph data table */ |
90 | | |
91 | | public: |
92 | | DEFINE_SIZE_STATIC (12); |
93 | | }; |
94 | | |
95 | | } /* namespace AAT */ |
96 | | |
97 | | |
98 | | #endif /* HB_AAT_LAYOUT_ANKR_TABLE_HH */ |