2008-01-23 22:14:38 +01:00
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/*
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* Copyright (C) 2007,2008 Red Hat, Inc.
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*
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* This is part of HarfBuzz, an OpenType Layout engine library.
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*
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* Permission is hereby granted, without written agreement and without
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* license or royalty fees, to use, copy, modify, and distribute this
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* software and its documentation for any purpose, provided that the
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* above copyright notice and the following two paragraphs appear in
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* all copies of this software.
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*
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
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* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
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* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*
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* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
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* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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*
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* Red Hat Author(s): Behdad Esfahbod
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*/
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2008-01-23 11:00:30 +01:00
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#ifndef HB_OT_LAYOUT_GDEF_PRIVATE_H
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#define HB_OT_LAYOUT_GDEF_PRIVATE_H
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2006-12-28 12:42:37 +01:00
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2008-01-23 23:01:55 +01:00
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#include "hb-private.h"
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#include "hb-ot-layout.h"
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2008-01-23 11:00:30 +01:00
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#include "hb-ot-layout-open-private.h"
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2006-12-28 12:42:37 +01:00
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2008-01-23 21:50:38 +01:00
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#define DEFINE_INDIRECT_GLYPH_ARRAY_LOOKUP(Type, name) \
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inline const Type& name (uint16_t glyph_id) { \
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const Coverage &c = get_coverage (); \
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int c_index = c.get_coverage (glyph_id); \
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return (*this)[c_index]; \
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}
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2007-07-06 17:29:21 +02:00
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struct GlyphClassDef : ClassDef {
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static const uint16_t BaseGlyph = 0x0001u;
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static const uint16_t LigatureGlyph = 0x0002u;
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static const uint16_t MarkGlyph = 0x0003u;
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static const uint16_t ComponentGlyph = 0x0004u;
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};
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2008-01-23 10:36:40 +01:00
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/*
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* Attachment List Table
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*/
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2007-07-06 17:29:21 +02:00
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2008-01-23 10:36:40 +01:00
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struct AttachPoint {
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2008-01-24 00:02:28 +01:00
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friend struct AttachList;
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private:
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2008-01-23 10:36:40 +01:00
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/* countour point indices, in increasing numerical order */
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DEFINE_ARRAY_TYPE (USHORT, pointIndex, pointCount);
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private:
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USHORT pointCount; /* Number of attachment points on
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* this glyph */
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USHORT pointIndex[]; /* Array of contour point indices--in
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* increasing numerical order */
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};
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DEFINE_NULL_ASSERT_SIZE (AttachPoint, 2);
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2008-01-23 06:20:48 +01:00
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2008-01-23 10:36:40 +01:00
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struct AttachList {
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2008-01-24 00:02:28 +01:00
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friend struct GDEF;
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private:
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2008-01-23 21:50:38 +01:00
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/* const AttachPoint& get_attach_points (uint16_t glyph_id); */
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DEFINE_INDIRECT_GLYPH_ARRAY_LOOKUP (AttachPoint, get_attach_points);
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2008-01-23 06:20:48 +01:00
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2008-01-23 10:36:40 +01:00
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private:
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/* AttachPoint tables, in Coverage Index order */
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DEFINE_OFFSET_ARRAY_TYPE (AttachPoint, attachPoint, glyphCount);
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DEFINE_ACCESSOR (Coverage, get_coverage, coverage);
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2007-07-06 17:29:21 +02:00
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2008-01-23 21:50:38 +01:00
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private:
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2007-07-06 17:29:21 +02:00
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Offset coverage; /* Offset to Coverage table -- from
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* beginning of AttachList table */
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USHORT glyphCount; /* Number of glyphs with attachment
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* points */
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Offset attachPoint[]; /* Array of offsets to AttachPoint
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* tables--from beginning of AttachList
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* table--in Coverage Index order */
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};
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2008-01-23 10:36:40 +01:00
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DEFINE_NULL_ASSERT_SIZE (AttachList, 4);
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2007-07-06 17:29:21 +02:00
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/*
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* Ligature Caret Table
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*/
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struct CaretValueFormat1 {
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2008-01-24 00:02:28 +01:00
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friend struct CaretValue;
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private:
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2007-07-06 17:29:21 +02:00
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inline int get_caret_value (int ppem) const {
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2008-01-23 06:20:48 +01:00
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return /* TODO garbage */ coordinate / ppem;
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2007-07-06 17:29:21 +02:00
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}
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2008-01-23 06:20:48 +01:00
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private:
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USHORT caretValueFormat; /* Format identifier--format = 1 */
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SHORT coordinate; /* X or Y value, in design units */
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2007-07-06 17:29:21 +02:00
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};
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2008-01-23 21:50:38 +01:00
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ASSERT_SIZE (CaretValueFormat1, 4);
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2007-07-06 17:29:21 +02:00
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struct CaretValueFormat2 {
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2008-01-24 00:02:28 +01:00
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friend struct CaretValue;
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private:
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2007-07-06 17:29:21 +02:00
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inline int get_caret_value (int ppem) const {
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2008-01-23 06:20:48 +01:00
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return /* TODO garbage */ 0 / ppem;
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2007-07-06 17:29:21 +02:00
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}
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2008-01-23 06:20:48 +01:00
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private:
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USHORT caretValueFormat; /* Format identifier--format = 2 */
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USHORT caretValuePoint; /* Contour point index on glyph */
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2007-07-06 17:29:21 +02:00
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};
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2008-01-23 21:50:38 +01:00
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ASSERT_SIZE (CaretValueFormat2, 4);
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2007-07-06 17:29:21 +02:00
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struct CaretValueFormat3 {
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2008-01-23 06:20:48 +01:00
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2008-01-24 00:02:28 +01:00
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friend struct CaretValue;
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private:
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2008-01-23 10:36:40 +01:00
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inline const Device& get_device (void) const {
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2008-01-23 21:50:38 +01:00
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if (HB_UNLIKELY (!deviceTable)) return NullDevice;
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2008-01-23 10:36:40 +01:00
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return *(const Device*)((const char*)this + deviceTable);
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2007-07-06 17:29:21 +02:00
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}
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2008-01-23 06:20:48 +01:00
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inline int get_caret_value (int ppem) const {
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2008-01-23 10:36:40 +01:00
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return /* TODO garbage */ (coordinate + get_device().get_delta (ppem)) / ppem;
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2008-01-23 06:20:48 +01:00
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}
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private:
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2007-07-06 17:29:21 +02:00
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USHORT caretValueFormat; /* Format identifier--format = 3 */
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SHORT coordinate; /* X or Y value, in design units */
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Offset deviceTable; /* Offset to Device table for X or Y
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* value--from beginning of CaretValue
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* table */
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};
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2008-01-23 21:50:38 +01:00
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ASSERT_SIZE (CaretValueFormat3, 6);
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2007-07-06 17:29:21 +02:00
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struct CaretValue {
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DEFINE_NON_INSTANTIABLE(CaretValue);
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2008-01-24 00:02:28 +01:00
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unsigned int get_size (void) const {
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2007-07-06 17:29:21 +02:00
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switch (u.caretValueFormat) {
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case 1: return sizeof (u.format1);
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case 2: return sizeof (u.format2);
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case 3: return sizeof (u.format3);
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default:return sizeof (u.caretValueFormat);
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}
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}
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/* XXX we need access to a load-contour-point vfunc here */
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2008-01-24 00:02:28 +01:00
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int get_caret_value (int ppem) const {
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2007-07-06 17:29:21 +02:00
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switch (u.caretValueFormat) {
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case 1: return u.format1.get_caret_value(ppem);
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case 2: return u.format2.get_caret_value(ppem);
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case 3: return u.format3.get_caret_value(ppem);
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default:return 0;
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}
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}
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2008-01-23 06:20:48 +01:00
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private:
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2007-07-06 17:29:21 +02:00
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union {
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USHORT caretValueFormat; /* Format identifier */
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CaretValueFormat1 format1;
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CaretValueFormat2 format2;
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CaretValueFormat3 format3;
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2008-01-23 06:20:48 +01:00
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/* FIXME old HarfBuzz code has a format 4 here! */
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2007-07-06 17:29:21 +02:00
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} u;
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};
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2008-01-23 10:36:40 +01:00
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DEFINE_NULL (CaretValue, 2);
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struct LigGlyph {
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2008-01-24 00:02:28 +01:00
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friend struct LigCaretList;
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private:
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2008-01-23 10:36:40 +01:00
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/* Caret value tables, in increasing coordinate order */
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DEFINE_OFFSET_ARRAY_TYPE (CaretValue, caretValue, caretCount);
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/* TODO */
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2006-12-28 12:42:37 +01:00
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2008-01-23 10:36:40 +01:00
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private:
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USHORT caretCount; /* Number of CaretValues for this
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* ligature (components - 1) */
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Offset caretValue[]; /* Array of offsets to CaretValue
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* tables--from beginning of LigGlyph
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* table--in increasing coordinate
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* order */
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};
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DEFINE_NULL_ASSERT_SIZE (LigGlyph, 2);
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2008-01-23 07:38:10 +01:00
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2008-01-23 21:50:38 +01:00
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struct LigCaretList {
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2008-01-24 00:02:28 +01:00
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friend struct GDEF;
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private:
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2008-01-23 21:50:38 +01:00
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/* const LigGlyph& get_lig_glyph (uint16_t glyph_id); */
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DEFINE_INDIRECT_GLYPH_ARRAY_LOOKUP (LigGlyph, get_lig_glyph);
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private:
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/* AttachPoint tables, in Coverage Index order */
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DEFINE_OFFSET_ARRAY_TYPE (LigGlyph, ligGlyph, ligGlyphCount);
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DEFINE_ACCESSOR (Coverage, get_coverage, coverage);
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private:
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Offset coverage; /* Offset to Coverage table--from
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* beginning of LigCaretList table */
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USHORT ligGlyphCount; /* Number of ligature glyphs */
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Offset ligGlyph[]; /* Array of offsets to LigGlyph
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* tables--from beginning of
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* LigCaretList table--in Coverage
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* Index order */
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};
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DEFINE_NULL_ASSERT_SIZE (LigCaretList, 4);
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2008-01-23 10:36:40 +01:00
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/*
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2008-01-23 23:25:29 +01:00
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* GDEF
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2008-01-23 10:36:40 +01:00
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*/
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2008-01-23 07:38:10 +01:00
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2008-01-23 23:25:29 +01:00
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struct GDEF {
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2008-01-24 00:02:28 +01:00
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static const hb_tag_t Tag = HB_TAG ('G','D','E','F');
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2008-01-23 08:01:37 +01:00
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2008-01-23 23:25:29 +01:00
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STATIC_DEFINE_GET_FOR_DATA (GDEF);
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/* XXX check version here? */
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2008-01-23 07:38:10 +01:00
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DEFINE_ACCESSOR (ClassDef, get_glyph_class_def, glyphClassDef);
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DEFINE_ACCESSOR (AttachList, get_attach_list, attachList);
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DEFINE_ACCESSOR (LigCaretList, get_lig_caret_list, ligCaretList);
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DEFINE_ACCESSOR (ClassDef, get_mark_attach_class_def, markAttachClassDef);
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/* Returns 0 if not found. */
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inline int get_glyph_class (uint16_t glyph_id) const {
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2008-01-24 00:02:28 +01:00
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return get_glyph_class_def ().get_class (glyph_id);
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2008-01-23 07:38:10 +01:00
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}
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/* Returns 0 if not found. */
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inline int get_mark_attachment_type (uint16_t glyph_id) const {
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2008-01-24 00:02:28 +01:00
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return get_mark_attach_class_def ().get_class (glyph_id);
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2008-01-23 07:38:10 +01:00
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}
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2008-01-23 10:36:40 +01:00
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/* TODO get_glyph_property */
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2008-01-23 07:38:10 +01:00
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/* TODO get_attach and get_lig_caret */
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private:
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Fixed version; /* Version of the GDEF table--initially
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* 0x00010000 */
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Offset glyphClassDef; /* Offset to class definition table
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* for glyph type--from beginning of
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2008-01-23 10:36:40 +01:00
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* GDEF header (may be Null) */
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2008-01-23 07:38:10 +01:00
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Offset attachList; /* Offset to list of glyphs with
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* attachment points--from beginning
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2008-01-23 10:36:40 +01:00
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* of GDEF header (may be Null) */
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2008-01-23 07:38:10 +01:00
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Offset ligCaretList; /* Offset to list of positioning points
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* for ligature carets--from beginning
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2008-01-23 10:36:40 +01:00
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* of GDEF header (may be Null) */
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2008-01-23 07:38:10 +01:00
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Offset markAttachClassDef; /* Offset to class definition table for
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* mark attachment type--from beginning
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2008-01-23 10:36:40 +01:00
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* of GDEF header (may be Null) */
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2008-01-23 07:38:10 +01:00
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};
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2008-01-23 23:25:29 +01:00
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DEFINE_NULL_ASSERT_SIZE (GDEF, 12);
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2008-01-23 07:38:10 +01:00
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2008-01-23 11:00:30 +01:00
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#endif /* HB_OT_LAYOUT_GDEF_PRIVATE_H */
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