2 * Copyright (C) 2007,2008,2009 Red Hat, Inc.
4 * This is part of HarfBuzz, a text shaping 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"
36 * Attachment List Table
39 typedef ArrayOf<USHORT> AttachPoint; /* Array of contour point indices--in
40 * increasing numerical order */
41 ASSERT_SIZE (AttachPoint, 2);
45 inline unsigned int get_attach_points (hb_codepoint_t glyph_id,
46 unsigned int start_offset,
47 unsigned int *point_count /* IN/OUT */,
48 unsigned int *point_array /* OUT */) const
50 unsigned int index = (this+coverage) (glyph_id);
51 if (index == NOT_COVERED)
58 const AttachPoint &points = this+attachPoint[index];
61 const USHORT *array = points.sub_array (start_offset, point_count);
62 unsigned int count = *point_count;
63 for (unsigned int i = 0; i < count; i++)
64 point_array[i] = array[i];
70 inline bool sanitize (SANITIZE_ARG_DEF) {
72 return SANITIZE_THIS2 (coverage, attachPoint);
77 coverage; /* Offset to Coverage table -- from
78 * beginning of AttachList table */
79 OffsetArrayOf<AttachPoint>
80 attachPoint; /* Array of AttachPoint tables
81 * in Coverage Index order */
83 ASSERT_SIZE (AttachList, 4);
86 * Ligature Caret Table
89 struct CaretValueFormat1
91 friend struct CaretValue;
94 inline int get_caret_value (hb_ot_layout_context_t *context, hb_codepoint_t glyph_id HB_GNUC_UNUSED) const
97 return _hb_16dot16_mul_round (context->font->x_scale, coordinate);
100 inline bool sanitize (SANITIZE_ARG_DEF) {
102 return SANITIZE_SELF ();
106 USHORT caretValueFormat; /* Format identifier--format = 1 */
107 SHORT coordinate; /* X or Y value, in design units */
109 ASSERT_SIZE (CaretValueFormat1, 4);
111 struct CaretValueFormat2
113 friend struct CaretValue;
116 inline int get_caret_value (hb_ot_layout_context_t *context, hb_codepoint_t glyph_id) const
120 if (hb_font_get_contour_point (context->font, context->face, caretValuePoint, glyph_id, &x, &y))
126 inline bool sanitize (SANITIZE_ARG_DEF) {
128 return SANITIZE_SELF ();
132 USHORT caretValueFormat; /* Format identifier--format = 2 */
133 USHORT caretValuePoint; /* Contour point index on glyph */
135 ASSERT_SIZE (CaretValueFormat2, 4);
137 struct CaretValueFormat3
139 friend struct CaretValue;
141 inline int get_caret_value (hb_ot_layout_context_t *context, hb_codepoint_t glyph_id HB_GNUC_UNUSED) const
144 return _hb_16dot16_mul_round (context->font->x_scale, coordinate) +
145 ((this+deviceTable).get_delta (context->font->x_ppem) << 16);
148 inline bool sanitize (SANITIZE_ARG_DEF) {
150 return SANITIZE_SELF () && SANITIZE_THIS (deviceTable);
154 USHORT caretValueFormat; /* Format identifier--format = 3 */
155 SHORT coordinate; /* X or Y value, in design units */
157 deviceTable; /* Offset to Device table for X or Y
158 * value--from beginning of CaretValue
161 ASSERT_SIZE (CaretValueFormat3, 6);
165 inline int get_caret_value (hb_ot_layout_context_t *context, hb_codepoint_t glyph_id) const
168 case 1: return u.format1->get_caret_value (context, glyph_id);
169 case 2: return u.format2->get_caret_value (context, glyph_id);
170 case 3: return u.format3->get_caret_value (context, glyph_id);
175 inline bool sanitize (SANITIZE_ARG_DEF) {
177 if (!SANITIZE (u.format)) return false;
179 case 1: return u.format1->sanitize (SANITIZE_ARG);
180 case 2: return u.format2->sanitize (SANITIZE_ARG);
181 case 3: return u.format3->sanitize (SANITIZE_ARG);
188 USHORT format; /* Format identifier */
189 CaretValueFormat1 format1[VAR];
190 CaretValueFormat2 format2[VAR];
191 CaretValueFormat3 format3[VAR];
197 inline unsigned int get_lig_carets (hb_ot_layout_context_t *context,
198 hb_codepoint_t glyph_id,
199 unsigned int start_offset,
200 unsigned int *caret_count /* IN/OUT */,
201 int *caret_array /* OUT */) const
204 const OffsetTo<CaretValue> *array = carets.sub_array (start_offset, caret_count);
205 unsigned int count = *caret_count;
206 for (unsigned int i = 0; i < count; i++)
207 caret_array[i] = (this+array[i]).get_caret_value (context, glyph_id);
213 inline bool sanitize (SANITIZE_ARG_DEF) {
215 return SANITIZE_THIS (carets);
219 OffsetArrayOf<CaretValue>
220 carets; /* Offset array of CaretValue tables
221 * --from beginning of LigGlyph table
222 * --in increasing coordinate order */
224 ASSERT_SIZE (LigGlyph, 2);
228 inline unsigned int get_lig_carets (hb_ot_layout_context_t *context,
229 hb_codepoint_t glyph_id,
230 unsigned int start_offset,
231 unsigned int *caret_count /* IN/OUT */,
232 int *caret_array /* OUT */) const
234 unsigned int index = (this+coverage) (glyph_id);
235 if (index == NOT_COVERED)
241 const LigGlyph &lig_glyph = this+ligGlyph[index];
242 return lig_glyph.get_lig_carets (context, glyph_id, start_offset, caret_count, caret_array);
245 inline bool sanitize (SANITIZE_ARG_DEF) {
247 return SANITIZE_THIS2 (coverage, ligGlyph);
252 coverage; /* Offset to Coverage table--from
253 * beginning of LigCaretList table */
254 OffsetArrayOf<LigGlyph>
255 ligGlyph; /* Array of LigGlyph tables
256 * in Coverage Index order */
258 ASSERT_SIZE (LigCaretList, 4);
261 struct MarkGlyphSetsFormat1
263 inline bool covers (unsigned int set_index, hb_codepoint_t glyph_id) const
264 { return (this+coverage[set_index]).get_coverage (glyph_id) != NOT_COVERED; }
266 inline bool sanitize (SANITIZE_ARG_DEF) {
268 return SANITIZE_THIS (coverage);
272 USHORT format; /* Format identifier--format = 1 */
273 LongOffsetArrayOf<Coverage>
274 coverage; /* Array of long offsets to mark set
277 ASSERT_SIZE (MarkGlyphSetsFormat1, 4);
281 inline bool covers (unsigned int set_index, hb_codepoint_t glyph_id) const
284 case 1: return u.format1->covers (set_index, glyph_id);
285 default:return false;
289 inline bool sanitize (SANITIZE_ARG_DEF) {
291 if (!SANITIZE (u.format)) return false;
293 case 1: return u.format1->sanitize (SANITIZE_ARG);
300 USHORT format; /* Format identifier */
301 MarkGlyphSetsFormat1 format1[VAR];
312 static const hb_tag_t Tag = HB_OT_TAG_GDEF;
315 UnclassifiedGlyph = 0,
322 inline bool has_glyph_classes () const { return glyphClassDef != 0; }
323 inline hb_ot_layout_class_t get_glyph_class (hb_codepoint_t glyph) const
324 { return (this+glyphClassDef).get_class (glyph); }
326 inline bool has_mark_attachment_types () const { return markAttachClassDef != 0; }
327 inline hb_ot_layout_class_t get_mark_attachment_type (hb_codepoint_t glyph) const
328 { return (this+markAttachClassDef).get_class (glyph); }
330 inline bool has_attach_points () const { return attachList != 0; }
331 inline unsigned int get_attach_points (hb_codepoint_t glyph_id,
332 unsigned int start_offset,
333 unsigned int *point_count /* IN/OUT */,
334 unsigned int *point_array /* OUT */) const
335 { return (this+attachList).get_attach_points (glyph_id, start_offset, point_count, point_array); }
337 inline bool has_lig_carets () const { return ligCaretList != 0; }
338 inline unsigned int get_lig_carets (hb_ot_layout_context_t *context,
339 hb_codepoint_t glyph_id,
340 unsigned int start_offset,
341 unsigned int *caret_count /* IN/OUT */,
342 int *caret_array /* OUT */) const
343 { return (this+ligCaretList).get_lig_carets (context, glyph_id, start_offset, caret_count, caret_array); }
345 inline bool has_mark_sets () const { return version >= 0x00010002 && markGlyphSetsDef[0] != 0; }
346 inline bool mark_set_covers (unsigned int set_index, hb_codepoint_t glyph_id) const
347 { return version >= 0x00010002 && (this+markGlyphSetsDef[0]).covers (set_index, glyph_id); }
349 inline bool sanitize (SANITIZE_ARG_DEF) {
351 if (!SANITIZE (version)) return false;
352 if (HB_UNLIKELY (version.major != 1)) return false;
353 return SANITIZE_THIS2 (glyphClassDef, attachList) &&
354 SANITIZE_THIS2 (ligCaretList, markAttachClassDef) &&
355 (version < 0x00010002 || SANITIZE_THIS (markGlyphSetsDef[0]));
359 FixedVersion version; /* Version of the GDEF table--currently
362 glyphClassDef; /* Offset to class definition table
363 * for glyph type--from beginning of
364 * GDEF header (may be Null) */
366 attachList; /* Offset to list of glyphs with
367 * attachment points--from beginning
368 * of GDEF header (may be Null) */
369 OffsetTo<LigCaretList>
370 ligCaretList; /* Offset to list of positioning points
371 * for ligature carets--from beginning
372 * of GDEF header (may be Null) */
374 markAttachClassDef; /* Offset to class definition table for
375 * mark attachment type--from beginning
376 * of GDEF header (may be Null) */
377 OffsetTo<MarkGlyphSets>
378 markGlyphSetsDef[VAR]; /* Offset to the table of mark set
379 * definitions--from beginning of GDEF
380 * header (may be NULL). Introduced
381 * in version 00010002. */
383 ASSERT_SIZE_VAR (GDEF, 12, OffsetTo<MarkGlyphSets>);
386 #endif /* HB_OT_LAYOUT_GDEF_PRIVATE_HH */