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"
32 #include "hb-font-private.h"
35 struct GlyphClassDef : ClassDef
39 LigatureGlyph = 0x0002u,
41 ComponentGlyph = 0x0004u,
46 * Attachment List Table
49 typedef ArrayOf<USHORT> AttachPoint; /* Array of contour point indices--in
50 * increasing numerical order */
51 ASSERT_SIZE (AttachPoint, 2);
55 inline bool get_attach_points (hb_codepoint_t glyph_id,
56 unsigned int *point_count /* IN/OUT */,
57 unsigned int *point_array /* OUT */) const
59 unsigned int index = (this+coverage) (glyph_id);
60 if (index == NOT_COVERED)
65 const AttachPoint &points = this+attachPoint[index];
67 unsigned int count = MIN (points.len, *point_count);
68 for (unsigned int i = 0; i < count; i++)
69 point_array[i] = points[i];
71 *point_count = points.len;
78 coverage; /* Offset to Coverage table -- from
79 * beginning of AttachList table */
80 OffsetArrayOf<AttachPoint>
81 attachPoint; /* Array of AttachPoint tables
82 * in Coverage Index order */
84 ASSERT_SIZE (AttachList, 4);
87 * Ligature Caret Table
90 struct CaretValueFormat1
92 friend struct CaretValue;
95 inline int get_caret_value (hb_ot_layout_context_t *context, hb_codepoint_t glyph_id) const
98 return context->font->x_scale * coordinate / 0x10000;
102 USHORT caretValueFormat; /* Format identifier--format = 1 */
103 SHORT coordinate; /* X or Y value, in design units */
105 ASSERT_SIZE (CaretValueFormat1, 4);
107 struct CaretValueFormat2
109 friend struct CaretValue;
112 inline int get_caret_value (hb_ot_layout_context_t *context, hb_codepoint_t glyph_id) const
114 return /* TODO contour point */ 0;
118 USHORT caretValueFormat; /* Format identifier--format = 2 */
119 USHORT caretValuePoint; /* Contour point index on glyph */
121 ASSERT_SIZE (CaretValueFormat2, 4);
123 struct CaretValueFormat3
125 friend struct CaretValue;
127 inline int get_caret_value (hb_ot_layout_context_t *context, hb_codepoint_t glyph_id) const
130 return context->font->x_scale * coordinate / 0x10000 +
131 (this+deviceTable).get_delta (context->font->x_ppem) << 6;
135 USHORT caretValueFormat; /* Format identifier--format = 3 */
136 SHORT coordinate; /* X or Y value, in design units */
138 deviceTable; /* Offset to Device table for X or Y
139 * value--from beginning of CaretValue
142 ASSERT_SIZE (CaretValueFormat3, 6);
146 /* XXX we need access to a load-contour-point vfunc here */
147 int get_caret_value (hb_ot_layout_context_t *context, hb_codepoint_t glyph_id) const
150 case 1: return u.format1->get_caret_value (context, glyph_id);
151 case 2: return u.format2->get_caret_value (context, glyph_id);
152 case 3: return u.format3->get_caret_value (context, glyph_id);
159 USHORT format; /* Format identifier */
160 CaretValueFormat1 format1[];
161 CaretValueFormat2 format2[];
162 CaretValueFormat3 format3[];
165 ASSERT_SIZE (CaretValue, 2);
169 inline void get_lig_carets (hb_ot_layout_context_t *context,
170 hb_codepoint_t glyph_id,
171 unsigned int *caret_count /* IN/OUT */,
172 int *caret_array /* OUT */) const
175 unsigned int count = MIN (carets.len, *caret_count);
176 for (unsigned int i = 0; i < count; i++)
177 caret_array[i] = (this+carets[i]).get_caret_value (context, glyph_id);
179 *caret_count = carets.len;
183 OffsetArrayOf<CaretValue>
184 carets; /* Offset rrray of CaretValue tables
185 * --from beginning of LigGlyph table
186 * --in increasing coordinate order */
188 ASSERT_SIZE (LigGlyph, 2);
192 inline bool get_lig_carets (hb_ot_layout_context_t *context,
193 hb_codepoint_t glyph_id,
194 unsigned int *caret_count /* IN/OUT */,
195 int *caret_array /* OUT */) const
197 unsigned int index = (this+coverage) (glyph_id);
198 if (index == NOT_COVERED)
203 const LigGlyph &lig_glyph = this+ligGlyph[index];
204 lig_glyph.get_lig_carets (context, glyph_id, caret_count, caret_array);
210 coverage; /* Offset to Coverage table--from
211 * beginning of LigCaretList table */
212 OffsetArrayOf<LigGlyph>
213 ligGlyph; /* Array of LigGlyph tables
214 * in Coverage Index order */
216 ASSERT_SIZE (LigCaretList, 4);
219 struct MarkGlyphSetsFormat1
221 inline bool covers (unsigned int set_index, hb_codepoint_t glyph_id) const
222 { return (this+coverage[set_index]).get_coverage (glyph_id) != NOT_COVERED; }
225 USHORT format; /* Format identifier--format = 1 */
226 LongOffsetArrayOf<Coverage>
227 coverage; /* Array of long offsets to mark set
230 ASSERT_SIZE (MarkGlyphSetsFormat1, 4);
234 inline bool covers (unsigned int set_index, hb_codepoint_t glyph_id) const
237 case 1: return u.format1->covers (set_index, glyph_id);
238 default:return false;
244 USHORT format; /* Format identifier */
245 MarkGlyphSetsFormat1 format1[];
248 ASSERT_SIZE (MarkGlyphSets, 2);
257 static const hb_tag_t Tag = HB_TAG ('G','D','E','F');
260 UnclassifiedGlyph = 0,
267 STATIC_DEFINE_GET_FOR_DATA_CHECK_MAJOR_VERSION (GDEF, 1, 1);
269 inline bool has_glyph_classes () const { return glyphClassDef != 0; }
270 inline hb_ot_layout_class_t get_glyph_class (hb_codepoint_t glyph) const
271 { return (this+glyphClassDef).get_class (glyph); }
273 inline bool has_mark_attachment_types () const { return markAttachClassDef != 0; }
274 inline hb_ot_layout_class_t get_mark_attachment_type (hb_codepoint_t glyph) const
275 { return (this+markAttachClassDef).get_class (glyph); }
277 inline bool has_attach_points () const { return attachList != 0; }
278 inline bool get_attach_points (hb_codepoint_t glyph_id,
279 unsigned int *point_count /* IN/OUT */,
280 unsigned int *point_array /* OUT */) const
281 { return (this+attachList).get_attach_points (glyph_id, point_count, point_array); }
283 inline bool has_lig_carets () const { return ligCaretList != 0; }
284 inline bool get_lig_carets (hb_ot_layout_context_t *context,
285 hb_codepoint_t glyph_id,
286 unsigned int *caret_count /* IN/OUT */,
287 int *caret_array /* OUT */) const
288 { return (this+ligCaretList).get_lig_carets (context, glyph_id, caret_count, caret_array); }
290 inline bool has_mark_sets () const { return version >= 0x00010002 && markGlyphSetsDef[0] != 0; }
291 inline bool mark_set_covers (unsigned int set_index, hb_codepoint_t glyph_id) const
292 { return version >= 0x00010002 && (this+markGlyphSetsDef[0]).covers (set_index, glyph_id); }
295 FixedVersion version; /* Version of the GDEF table--currently
298 glyphClassDef; /* Offset to class definition table
299 * for glyph type--from beginning of
300 * GDEF header (may be Null) */
302 attachList; /* Offset to list of glyphs with
303 * attachment points--from beginning
304 * of GDEF header (may be Null) */
305 OffsetTo<LigCaretList>
306 ligCaretList; /* Offset to list of positioning points
307 * for ligature carets--from beginning
308 * of GDEF header (may be Null) */
310 markAttachClassDef; /* Offset to class definition table for
311 * mark attachment type--from beginning
312 * of GDEF header (may be Null) */
313 OffsetTo<MarkGlyphSets>
314 markGlyphSetsDef[0]; /* Offset to the table of mark set
315 * definitions--from beginning of GDEF
316 * header (may be NULL). Introduced
317 * in version 00010002. */
319 ASSERT_SIZE (GDEF, 12);
322 #endif /* HB_OT_LAYOUT_GDEF_PRIVATE_HH */