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"
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.const_array () + start_offset;
62 unsigned int count = MIN (MIN (0, (unsigned int) points.len - start_offset), *point_count);
63 for (unsigned int i = 0; i < count; i++)
64 point_array[i] = array[i];
66 *point_count = points.len;
72 inline bool sanitize (SANITIZE_ARG_DEF) {
74 return SANITIZE_THIS2 (coverage, attachPoint);
79 coverage; /* Offset to Coverage table -- from
80 * beginning of AttachList table */
81 OffsetArrayOf<AttachPoint>
82 attachPoint; /* Array of AttachPoint tables
83 * in Coverage Index order */
85 ASSERT_SIZE (AttachList, 4);
88 * Ligature Caret Table
91 struct CaretValueFormat1
93 friend struct CaretValue;
96 inline int get_caret_value (hb_ot_layout_context_t *context, hb_codepoint_t glyph_id) const
99 return context->font->x_scale * coordinate / 0x10000;
102 inline bool sanitize (SANITIZE_ARG_DEF) {
104 return SANITIZE_SELF ();
108 USHORT caretValueFormat; /* Format identifier--format = 1 */
109 SHORT coordinate; /* X or Y value, in design units */
111 ASSERT_SIZE (CaretValueFormat1, 4);
113 struct CaretValueFormat2
115 friend struct CaretValue;
118 inline int get_caret_value (hb_ot_layout_context_t *context, hb_codepoint_t glyph_id) const
120 return /* TODO contour point */ 0;
123 inline bool sanitize (SANITIZE_ARG_DEF) {
125 return SANITIZE_SELF ();
129 USHORT caretValueFormat; /* Format identifier--format = 2 */
130 USHORT caretValuePoint; /* Contour point index on glyph */
132 ASSERT_SIZE (CaretValueFormat2, 4);
134 struct CaretValueFormat3
136 friend struct CaretValue;
138 inline int get_caret_value (hb_ot_layout_context_t *context, hb_codepoint_t glyph_id) const
141 return context->font->x_scale * coordinate / 0x10000 +
142 ((this+deviceTable).get_delta (context->font->x_ppem) << 6);
145 inline bool sanitize (SANITIZE_ARG_DEF) {
147 return SANITIZE_SELF () && SANITIZE_THIS (deviceTable);
151 USHORT caretValueFormat; /* Format identifier--format = 3 */
152 SHORT coordinate; /* X or Y value, in design units */
154 deviceTable; /* Offset to Device table for X or Y
155 * value--from beginning of CaretValue
158 ASSERT_SIZE (CaretValueFormat3, 6);
162 inline int get_caret_value (hb_ot_layout_context_t *context, hb_codepoint_t glyph_id) const
165 case 1: return u.format1->get_caret_value (context, glyph_id);
166 case 2: return u.format2->get_caret_value (context, glyph_id);
167 case 3: return u.format3->get_caret_value (context, glyph_id);
172 inline bool sanitize (SANITIZE_ARG_DEF) {
174 if (!SANITIZE (u.format)) return false;
176 case 1: return u.format1->sanitize (SANITIZE_ARG);
177 case 2: return u.format2->sanitize (SANITIZE_ARG);
178 case 3: return u.format3->sanitize (SANITIZE_ARG);
185 USHORT format; /* Format identifier */
186 CaretValueFormat1 format1[VAR];
187 CaretValueFormat2 format2[VAR];
188 CaretValueFormat3 format3[VAR];
194 inline unsigned int get_lig_carets (hb_ot_layout_context_t *context,
195 hb_codepoint_t glyph_id,
196 unsigned int start_offset,
197 unsigned int *caret_count /* IN/OUT */,
198 int *caret_array /* OUT */) const
201 const OffsetTo<CaretValue> *array = carets.const_array () + start_offset;
202 unsigned int count = MIN (MIN (0, (unsigned int) carets.len - start_offset), *caret_count);
203 for (unsigned int i = 0; i < count; i++)
204 caret_array[i] = (this+array[i]).get_caret_value (context, glyph_id);
206 *caret_count = carets.len;
212 inline bool sanitize (SANITIZE_ARG_DEF) {
214 return SANITIZE_THIS (carets);
218 OffsetArrayOf<CaretValue>
219 carets; /* Offset array of CaretValue tables
220 * --from beginning of LigGlyph table
221 * --in increasing coordinate order */
223 ASSERT_SIZE (LigGlyph, 2);
227 inline unsigned int get_lig_carets (hb_ot_layout_context_t *context,
228 hb_codepoint_t glyph_id,
229 unsigned int start_offset,
230 unsigned int *caret_count /* IN/OUT */,
231 int *caret_array /* OUT */) const
233 unsigned int index = (this+coverage) (glyph_id);
234 if (index == NOT_COVERED)
240 const LigGlyph &lig_glyph = this+ligGlyph[index];
241 return lig_glyph.get_lig_carets (context, glyph_id, start_offset, caret_count, caret_array);
244 inline bool sanitize (SANITIZE_ARG_DEF) {
246 return SANITIZE_THIS2 (coverage, ligGlyph);
251 coverage; /* Offset to Coverage table--from
252 * beginning of LigCaretList table */
253 OffsetArrayOf<LigGlyph>
254 ligGlyph; /* Array of LigGlyph tables
255 * in Coverage Index order */
257 ASSERT_SIZE (LigCaretList, 4);
260 struct MarkGlyphSetsFormat1
262 inline bool covers (unsigned int set_index, hb_codepoint_t glyph_id) const
263 { return (this+coverage[set_index]).get_coverage (glyph_id) != NOT_COVERED; }
265 inline bool sanitize (SANITIZE_ARG_DEF) {
267 return SANITIZE_THIS (coverage);
271 USHORT format; /* Format identifier--format = 1 */
272 LongOffsetArrayOf<Coverage>
273 coverage; /* Array of long offsets to mark set
276 ASSERT_SIZE (MarkGlyphSetsFormat1, 4);
280 inline bool covers (unsigned int set_index, hb_codepoint_t glyph_id) const
283 case 1: return u.format1->covers (set_index, glyph_id);
284 default:return false;
288 inline bool sanitize (SANITIZE_ARG_DEF) {
290 if (!SANITIZE (u.format)) return false;
292 case 1: return u.format1->sanitize (SANITIZE_ARG);
299 USHORT format; /* Format identifier */
300 MarkGlyphSetsFormat1 format1[VAR];
311 static const hb_tag_t Tag = HB_OT_TAG_GDEF;
314 UnclassifiedGlyph = 0,
321 STATIC_DEFINE_GET_FOR_DATA_CHECK_MAJOR_VERSION (GDEF, 1, 1);
323 inline bool has_glyph_classes () const { return glyphClassDef != 0; }
324 inline hb_ot_layout_class_t get_glyph_class (hb_codepoint_t glyph) const
325 { return (this+glyphClassDef).get_class (glyph); }
327 inline bool has_mark_attachment_types () const { return markAttachClassDef != 0; }
328 inline hb_ot_layout_class_t get_mark_attachment_type (hb_codepoint_t glyph) const
329 { return (this+markAttachClassDef).get_class (glyph); }
331 inline bool has_attach_points () const { return attachList != 0; }
332 inline unsigned int get_attach_points (hb_codepoint_t glyph_id,
333 unsigned int start_offset,
334 unsigned int *point_count /* IN/OUT */,
335 unsigned int *point_array /* OUT */) const
336 { return (this+attachList).get_attach_points (glyph_id, start_offset, point_count, point_array); }
338 inline bool has_lig_carets () const { return ligCaretList != 0; }
339 inline unsigned int get_lig_carets (hb_ot_layout_context_t *context,
340 hb_codepoint_t glyph_id,
341 unsigned int start_offset,
342 unsigned int *caret_count /* IN/OUT */,
343 int *caret_array /* OUT */) const
344 { return (this+ligCaretList).get_lig_carets (context, glyph_id, start_offset, caret_count, caret_array); }
346 inline bool has_mark_sets () const { return version >= 0x00010002 && markGlyphSetsDef[0] != 0; }
347 inline bool mark_set_covers (unsigned int set_index, hb_codepoint_t glyph_id) const
348 { return version >= 0x00010002 && (this+markGlyphSetsDef[0]).covers (set_index, glyph_id); }
350 inline bool sanitize (SANITIZE_ARG_DEF) {
352 if (!SANITIZE (version)) return false;
353 if (version.major != 1) return true;
354 return SANITIZE_THIS2 (glyphClassDef, attachList) &&
355 SANITIZE_THIS2 (ligCaretList, markAttachClassDef) &&
356 (version < 0x00010002 || SANITIZE_THIS (markGlyphSetsDef[0]));
360 FixedVersion version; /* Version of the GDEF table--currently
363 glyphClassDef; /* Offset to class definition table
364 * for glyph type--from beginning of
365 * GDEF header (may be Null) */
367 attachList; /* Offset to list of glyphs with
368 * attachment points--from beginning
369 * of GDEF header (may be Null) */
370 OffsetTo<LigCaretList>
371 ligCaretList; /* Offset to list of positioning points
372 * for ligature carets--from beginning
373 * of GDEF header (may be Null) */
375 markAttachClassDef; /* Offset to class definition table for
376 * mark attachment type--from beginning
377 * of GDEF header (may be Null) */
378 OffsetTo<MarkGlyphSets>
379 markGlyphSetsDef[VAR]; /* Offset to the table of mark set
380 * definitions--from beginning of GDEF
381 * header (may be NULL). Introduced
382 * in version 00010002. */
384 ASSERT_SIZE_VAR (GDEF, 12, OffsetTo<MarkGlyphSets>);
387 #endif /* HB_OT_LAYOUT_GDEF_PRIVATE_HH */