2 * Copyright (C) 2007,2008,2009 Red Hat, Inc.
4 * This is part of HarfBuzz, an OpenType Layout engine library.
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.
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
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.
24 * Red Hat Author(s): Behdad Esfahbod
27 #ifndef HB_OT_LAYOUT_GDEF_PRIVATE_HH
28 #define HB_OT_LAYOUT_GDEF_PRIVATE_HH
30 #include "hb-ot-layout-common-private.hh"
33 struct GlyphClassDef : ClassDef
37 LigatureGlyph = 0x0002u,
39 ComponentGlyph = 0x0004u,
44 * Attachment List Table
47 typedef ArrayOf<USHORT> AttachPoint; /* Array of contour point indices--in
48 * increasing numerical order */
49 ASSERT_SIZE (AttachPoint, 2);
53 inline bool get_attach_points (hb_codepoint_t glyph_id,
54 unsigned int *point_count /* IN/OUT */,
55 unsigned int *point_array /* OUT */) const
57 unsigned int index = (this+coverage) (glyph_id);
58 if (index == NOT_COVERED)
63 const AttachPoint &points = this+attachPoint[index];
65 unsigned int count = MIN (points.len, *point_count);
66 for (unsigned int i = 0; i < count; i++)
67 point_array[i] = points[i];
69 *point_count = points.len;
76 coverage; /* Offset to Coverage table -- from
77 * beginning of AttachList table */
78 OffsetArrayOf<AttachPoint>
79 attachPoint; /* Array of AttachPoint tables
80 * in Coverage Index order */
82 ASSERT_SIZE (AttachList, 4);
85 * Ligature Caret Table
88 struct CaretValueFormat1
90 friend struct CaretValue;
93 inline int get_caret_value (hb_ot_layout_context_t *context, hb_codepoint_t glyph_id) const
96 return context->font->x_scale * coordinate / 0x10000;
100 USHORT caretValueFormat; /* Format identifier--format = 1 */
101 SHORT coordinate; /* X or Y value, in design units */
103 ASSERT_SIZE (CaretValueFormat1, 4);
105 struct CaretValueFormat2
107 friend struct CaretValue;
110 inline int get_caret_value (hb_ot_layout_context_t *context, hb_codepoint_t glyph_id) const
112 return /* TODO contour point */ 0;
116 USHORT caretValueFormat; /* Format identifier--format = 2 */
117 USHORT caretValuePoint; /* Contour point index on glyph */
119 ASSERT_SIZE (CaretValueFormat2, 4);
121 struct CaretValueFormat3
123 friend struct CaretValue;
125 inline int get_caret_value (hb_ot_layout_context_t *context, hb_codepoint_t glyph_id) const
128 return context->font->x_scale * coordinate / 0x10000 +
129 (this+deviceTable).get_delta (context->font->x_ppem) << 6;
133 USHORT caretValueFormat; /* Format identifier--format = 3 */
134 SHORT coordinate; /* X or Y value, in design units */
136 deviceTable; /* Offset to Device table for X or Y
137 * value--from beginning of CaretValue
140 ASSERT_SIZE (CaretValueFormat3, 6);
144 /* XXX we need access to a load-contour-point vfunc here */
145 int get_caret_value (hb_ot_layout_context_t *context, hb_codepoint_t glyph_id) const
148 case 1: return u.format1->get_caret_value (context, glyph_id);
149 case 2: return u.format2->get_caret_value (context, glyph_id);
150 case 3: return u.format3->get_caret_value (context, glyph_id);
157 USHORT format; /* Format identifier */
158 CaretValueFormat1 format1[];
159 CaretValueFormat2 format2[];
160 CaretValueFormat3 format3[];
163 ASSERT_SIZE (CaretValue, 2);
167 inline void get_lig_carets (hb_ot_layout_context_t *context,
168 hb_codepoint_t glyph_id,
169 unsigned int *caret_count /* IN/OUT */,
170 int *caret_array /* OUT */) const
173 unsigned int count = MIN (carets.len, *caret_count);
174 for (unsigned int i = 0; i < count; i++)
175 caret_array[i] = (this+carets[i]).get_caret_value (context, glyph_id);
177 *caret_count = carets.len;
181 OffsetArrayOf<CaretValue>
182 carets; /* Offset rrray of CaretValue tables
183 * --from beginning of LigGlyph table
184 * --in increasing coordinate order */
186 ASSERT_SIZE (LigGlyph, 2);
190 inline bool get_lig_carets (hb_ot_layout_context_t *context,
191 hb_codepoint_t glyph_id,
192 unsigned int *caret_count /* IN/OUT */,
193 int *caret_array /* OUT */) const
195 unsigned int index = (this+coverage) (glyph_id);
196 if (index == NOT_COVERED)
201 const LigGlyph &lig_glyph = this+ligGlyph[index];
202 lig_glyph.get_lig_carets (context, glyph_id, caret_count, caret_array);
208 coverage; /* Offset to Coverage table--from
209 * beginning of LigCaretList table */
210 OffsetArrayOf<LigGlyph>
211 ligGlyph; /* Array of LigGlyph tables
212 * in Coverage Index order */
214 ASSERT_SIZE (LigCaretList, 4);
217 struct MarkGlyphSetsFormat1
219 inline bool covers (unsigned int set_index, hb_codepoint_t glyph_id) const
220 { return (this+coverage[set_index]).get_coverage (glyph_id) != NOT_COVERED; }
223 USHORT format; /* Format identifier--format = 1 */
224 LongOffsetArrayOf<Coverage>
225 coverage; /* Array of long offsets to mark set
228 ASSERT_SIZE (MarkGlyphSetsFormat1, 4);
232 inline bool covers (unsigned int set_index, hb_codepoint_t glyph_id) const
235 case 1: return u.format1->covers (set_index, glyph_id);
236 default:return false;
242 USHORT format; /* Format identifier */
243 MarkGlyphSetsFormat1 format1[];
246 ASSERT_SIZE (MarkGlyphSets, 2);
255 static const hb_tag_t Tag = HB_TAG ('G','D','E','F');
258 UnclassifiedGlyph = 0,
265 STATIC_DEFINE_GET_FOR_DATA_CHECK_MAJOR_VERSION (GDEF, 1);
267 inline bool has_glyph_classes () const { return glyphClassDef != 0; }
268 inline hb_ot_layout_class_t get_glyph_class (hb_codepoint_t glyph) const
269 { return (this+glyphClassDef).get_class (glyph); }
271 inline bool has_mark_attachment_types () const { return markAttachClassDef != 0; }
272 inline hb_ot_layout_class_t get_mark_attachment_type (hb_codepoint_t glyph) const
273 { return (this+markAttachClassDef).get_class (glyph); }
275 inline bool has_attach_points () const { return attachList != 0; }
276 inline bool get_attach_points (hb_codepoint_t glyph_id,
277 unsigned int *point_count /* IN/OUT */,
278 unsigned int *point_array /* OUT */) const
279 { return (this+attachList).get_attach_points (glyph_id, point_count, point_array); }
281 inline bool has_lig_carets () const { return ligCaretList != 0; }
282 inline bool get_lig_carets (hb_ot_layout_context_t *context,
283 hb_codepoint_t glyph_id,
284 unsigned int *caret_count /* IN/OUT */,
285 int *caret_array /* OUT */) const
286 { return (this+ligCaretList).get_lig_carets (context, glyph_id, caret_count, caret_array); }
288 inline bool has_mark_sets () const { return version >= 0x00010002 && markGlyphSetsDef[0] != 0; }
289 inline bool mark_set_covers (unsigned int set_index, hb_codepoint_t glyph_id) const
290 { return version >= 0x00010002 && (this+markGlyphSetsDef[0]).covers (set_index, glyph_id); }
293 FixedVersion version; /* Version of the GDEF table--currently
296 glyphClassDef; /* Offset to class definition table
297 * for glyph type--from beginning of
298 * GDEF header (may be Null) */
300 attachList; /* Offset to list of glyphs with
301 * attachment points--from beginning
302 * of GDEF header (may be Null) */
303 OffsetTo<LigCaretList>
304 ligCaretList; /* Offset to list of positioning points
305 * for ligature carets--from beginning
306 * of GDEF header (may be Null) */
308 markAttachClassDef; /* Offset to class definition table for
309 * mark attachment type--from beginning
310 * of GDEF header (may be Null) */
311 OffsetTo<MarkGlyphSets>
312 markGlyphSetsDef[0]; /* Offset to the table of mark set
313 * definitions--from beginning of GDEF
314 * header (may be NULL). Introduced
315 * in version 00010002. */
317 ASSERT_SIZE (GDEF, 12);
320 #endif /* HB_OT_LAYOUT_GDEF_PRIVATE_HH */