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 (hb_sanitize_context_t *context) {
72 return coverage.sanitize (context, this)
73 && attachPoint.sanitize (context, this);
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 HB_UNUSED) const
98 return _hb_16dot16_mul_round (context->font->x_scale, coordinate);
101 inline bool sanitize (hb_sanitize_context_t *context) {
103 return context->check_struct (this);
107 USHORT caretValueFormat; /* Format identifier--format = 1 */
108 SHORT coordinate; /* X or Y value, in design units */
110 ASSERT_SIZE (CaretValueFormat1, 4);
112 struct CaretValueFormat2
114 friend struct CaretValue;
117 inline int get_caret_value (hb_ot_layout_context_t *context, hb_codepoint_t glyph_id) const
121 if (hb_font_get_contour_point (context->font, context->face, caretValuePoint, glyph_id, &x, &y))
127 inline bool sanitize (hb_sanitize_context_t *context) {
129 return context->check_struct (this);
133 USHORT caretValueFormat; /* Format identifier--format = 2 */
134 USHORT caretValuePoint; /* Contour point index on glyph */
136 ASSERT_SIZE (CaretValueFormat2, 4);
138 struct CaretValueFormat3
140 friend struct CaretValue;
142 inline int get_caret_value (hb_ot_layout_context_t *context, hb_codepoint_t glyph_id HB_UNUSED) const
145 return _hb_16dot16_mul_round (context->font->x_scale, coordinate) +
146 ((this+deviceTable).get_delta (context->font->x_ppem) << 16);
149 inline bool sanitize (hb_sanitize_context_t *context) {
151 return context->check_struct (this)
152 && deviceTable.sanitize (context, this);
156 USHORT caretValueFormat; /* Format identifier--format = 3 */
157 SHORT coordinate; /* X or Y value, in design units */
159 deviceTable; /* Offset to Device table for X or Y
160 * value--from beginning of CaretValue
163 ASSERT_SIZE (CaretValueFormat3, 6);
167 inline int get_caret_value (hb_ot_layout_context_t *context, hb_codepoint_t glyph_id) const
170 case 1: return u.format1->get_caret_value (context, glyph_id);
171 case 2: return u.format2->get_caret_value (context, glyph_id);
172 case 3: return u.format3->get_caret_value (context, glyph_id);
177 inline bool sanitize (hb_sanitize_context_t *context) {
179 if (!u.format.sanitize (context)) return false;
181 case 1: return u.format1->sanitize (context);
182 case 2: return u.format2->sanitize (context);
183 case 3: return u.format3->sanitize (context);
190 USHORT format; /* Format identifier */
191 CaretValueFormat1 format1[VAR];
192 CaretValueFormat2 format2[VAR];
193 CaretValueFormat3 format3[VAR];
199 inline unsigned int get_lig_carets (hb_ot_layout_context_t *context,
200 hb_codepoint_t glyph_id,
201 unsigned int start_offset,
202 unsigned int *caret_count /* IN/OUT */,
203 int *caret_array /* OUT */) const
206 const OffsetTo<CaretValue> *array = carets.sub_array (start_offset, caret_count);
207 unsigned int count = *caret_count;
208 for (unsigned int i = 0; i < count; i++)
209 caret_array[i] = (this+array[i]).get_caret_value (context, glyph_id);
215 inline bool sanitize (hb_sanitize_context_t *context) {
217 return carets.sanitize (context, this);
221 OffsetArrayOf<CaretValue>
222 carets; /* Offset array of CaretValue tables
223 * --from beginning of LigGlyph table
224 * --in increasing coordinate order */
226 ASSERT_SIZE (LigGlyph, 2);
230 inline unsigned int get_lig_carets (hb_ot_layout_context_t *context,
231 hb_codepoint_t glyph_id,
232 unsigned int start_offset,
233 unsigned int *caret_count /* IN/OUT */,
234 int *caret_array /* OUT */) const
236 unsigned int index = (this+coverage) (glyph_id);
237 if (index == NOT_COVERED)
243 const LigGlyph &lig_glyph = this+ligGlyph[index];
244 return lig_glyph.get_lig_carets (context, glyph_id, start_offset, caret_count, caret_array);
247 inline bool sanitize (hb_sanitize_context_t *context) {
249 return coverage.sanitize (context, this)
250 && ligGlyph.sanitize (context, this);
255 coverage; /* Offset to Coverage table--from
256 * beginning of LigCaretList table */
257 OffsetArrayOf<LigGlyph>
258 ligGlyph; /* Array of LigGlyph tables
259 * in Coverage Index order */
261 ASSERT_SIZE (LigCaretList, 4);
264 struct MarkGlyphSetsFormat1
266 inline bool covers (unsigned int set_index, hb_codepoint_t glyph_id) const
267 { return (this+coverage[set_index]).get_coverage (glyph_id) != NOT_COVERED; }
269 inline bool sanitize (hb_sanitize_context_t *context) {
271 return coverage.sanitize (context, this);
275 USHORT format; /* Format identifier--format = 1 */
276 LongOffsetArrayOf<Coverage>
277 coverage; /* Array of long offsets to mark set
280 ASSERT_SIZE (MarkGlyphSetsFormat1, 4);
284 inline bool covers (unsigned int set_index, hb_codepoint_t glyph_id) const
287 case 1: return u.format1->covers (set_index, glyph_id);
288 default:return false;
292 inline bool sanitize (hb_sanitize_context_t *context) {
294 if (!u.format.sanitize (context)) return false;
296 case 1: return u.format1->sanitize (context);
303 USHORT format; /* Format identifier */
304 MarkGlyphSetsFormat1 format1[VAR];
315 static const hb_tag_t Tag = HB_OT_TAG_GDEF;
318 UnclassifiedGlyph = 0,
325 inline bool has_glyph_classes () const { return glyphClassDef != 0; }
326 inline hb_ot_layout_class_t get_glyph_class (hb_codepoint_t glyph) const
327 { return (this+glyphClassDef).get_class (glyph); }
329 inline bool has_mark_attachment_types () const { return markAttachClassDef != 0; }
330 inline hb_ot_layout_class_t get_mark_attachment_type (hb_codepoint_t glyph) const
331 { return (this+markAttachClassDef).get_class (glyph); }
333 inline bool has_attach_points () const { return attachList != 0; }
334 inline unsigned int get_attach_points (hb_codepoint_t glyph_id,
335 unsigned int start_offset,
336 unsigned int *point_count /* IN/OUT */,
337 unsigned int *point_array /* OUT */) const
338 { return (this+attachList).get_attach_points (glyph_id, start_offset, point_count, point_array); }
340 inline bool has_lig_carets () const { return ligCaretList != 0; }
341 inline unsigned int get_lig_carets (hb_ot_layout_context_t *context,
342 hb_codepoint_t glyph_id,
343 unsigned int start_offset,
344 unsigned int *caret_count /* IN/OUT */,
345 int *caret_array /* OUT */) const
346 { return (this+ligCaretList).get_lig_carets (context, glyph_id, start_offset, caret_count, caret_array); }
348 inline bool has_mark_sets () const { return version >= 0x00010002 && markGlyphSetsDef[0] != 0; }
349 inline bool mark_set_covers (unsigned int set_index, hb_codepoint_t glyph_id) const
350 { return version >= 0x00010002 && (this+markGlyphSetsDef[0]).covers (set_index, glyph_id); }
352 inline bool sanitize (hb_sanitize_context_t *context) {
354 return version.sanitize (context) && likely (version.major == 1)
355 && glyphClassDef.sanitize (context, this)
356 && attachList.sanitize (context, this)
357 && ligCaretList.sanitize (context, this)
358 && markAttachClassDef.sanitize (context, this)
359 && (version < 0x00010002 || markGlyphSetsDef[0].sanitize (context, this));
363 FixedVersion version; /* Version of the GDEF table--currently
366 glyphClassDef; /* Offset to class definition table
367 * for glyph type--from beginning of
368 * GDEF header (may be Null) */
370 attachList; /* Offset to list of glyphs with
371 * attachment points--from beginning
372 * of GDEF header (may be Null) */
373 OffsetTo<LigCaretList>
374 ligCaretList; /* Offset to list of positioning points
375 * for ligature carets--from beginning
376 * of GDEF header (may be Null) */
378 markAttachClassDef; /* Offset to class definition table for
379 * mark attachment type--from beginning
380 * of GDEF header (may be Null) */
381 OffsetTo<MarkGlyphSets>
382 markGlyphSetsDef[VAR]; /* Offset to the table of mark set
383 * definitions--from beginning of GDEF
384 * header (may be NULL). Introduced
385 * in version 00010002. */
387 DEFINE_SIZE_VAR (12, OffsetTo<MarkGlyphSets>);
391 #endif /* HB_OT_LAYOUT_GDEF_PRIVATE_HH */