summaryrefslogtreecommitdiff
path: root/Build/source/libs/harfbuzz/harfbuzz-src/src/hb-ot-color-svg-table.hh
blob: ed6cf970820ccbf48d1b329a8e641aa80a5e5a4c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
/*
 * Copyright © 2018  Ebrahim Byagowi
 *
 *  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.
 */

#ifndef HB_OT_COLOR_SVG_TABLE_HH
#define HB_OT_COLOR_SVG_TABLE_HH

#include "hb-open-type-private.hh"

/*
 * SVG -- SVG (Scalable Vector Graphics)
 * https://docs.microsoft.com/en-us/typography/opentype/spec/svg
 */

#define HB_OT_TAG_SVG HB_TAG('S','V','G',' ')


namespace OT {


struct SVGDocumentIndexEntry
{
  friend struct SVG;

  inline bool sanitize (hb_sanitize_context_t *c, const void* base) const
  {
    TRACE_SANITIZE (this);
    return_trace (c->check_struct (this) &&
		  (base+svgDoc).sanitize (c, svgDocLength));
  }

  protected:
  HBUINT16	startGlyphID;	/* The first glyph ID in the range described by
				 * this index entry. */
  HBUINT16	endGlyphID;	/* The last glyph ID in the range described by
				 * this index entry. Must be >= startGlyphID. */
  LOffsetTo<UnsizedArrayOf<HBUINT8> >
		svgDoc;		/* Offset from the beginning of the SVG Document Index
				 * to an SVG document. Must be non-zero. */
  HBUINT32 svgDocLength;	/* Length of the SVG document.
				 * Must be non-zero. */
  public:
  DEFINE_SIZE_STATIC (12);
};

struct SVGDocumentIndex
{
  friend struct SVG;

  inline bool sanitize (hb_sanitize_context_t *c) const
  {
    TRACE_SANITIZE (this);
    return_trace (c->check_struct (this) &&
		  entries.sanitize (c, this));
  }

  protected:
  ArrayOf<SVGDocumentIndexEntry>
		entries;	/* Array of SVG Document Index Entries. */
  public:
  DEFINE_SIZE_ARRAY (2, entries);
};

struct SVG
{
  static const hb_tag_t tableTag = HB_OT_TAG_SVG;

  inline bool sanitize (hb_sanitize_context_t *c) const
  {
    TRACE_SANITIZE (this);
    return_trace (likely (c->check_struct (this) &&
			  (this+svgDocIndex).sanitize (c)));
  }

  struct accelerator_t
  {
    inline void init (hb_face_t *face)
    {
      OT::Sanitizer<OT::SVG> sanitizer;
      svg_blob = sanitizer.sanitize (face->reference_table (HB_OT_TAG_SVG));
      svg_len = hb_blob_get_length (svg_blob);
      svg = svg_blob->as<OT::SVG> ();

    }

    inline void fini (void)
    {
      hb_blob_destroy (svg_blob);
    }

    inline void
    dump (void (*callback) (const uint8_t* data, unsigned int length,
			    unsigned int start_glyph, unsigned int end_glyph)) const
    {
      const SVGDocumentIndex &index = svg+svg->svgDocIndex;
      const ArrayOf<SVGDocumentIndexEntry> &entries = index.entries;
      for (unsigned int i = 0; i < entries.len; ++i)
      {
	const SVGDocumentIndexEntry &entry = entries[i];
	callback ((const uint8_t*) &entry.svgDoc (&index), entry.svgDocLength,
						  entry.startGlyphID, entry.endGlyphID);
      }
    }

    private:
    hb_blob_t *svg_blob;
    const SVG *svg;

    unsigned int svg_len;
  };

  protected:
  HBUINT16	version;	/* Table version (starting at 0). */
  LOffsetTo<SVGDocumentIndex>
		svgDocIndex;	/* Offset (relative to the start of the SVG table) to the
				 * SVG Documents Index. Must be non-zero. */
  HBUINT32	reserved;	/* Set to 0. */
  public:
  DEFINE_SIZE_STATIC (10);
};

} /* namespace OT */


#endif /* HB_OT_COLOR_SVG_TABLE_HH */