--- /dev/null
+/*
+ * Copyright (C) 2007,2008 Red Hat, Inc.
+ *
+ * This is part of HarfBuzz, an OpenType Layout engine library.
+ *
+ * Permission is hereby granted, without written agreement and without
+ * license or royalty fees, to use, copy, modify, and distribute this
+ * software and its documentation for any purpose, provided that the
+ * above copyright notice and the following two paragraphs appear in
+ * all copies of this software.
+ *
+ * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
+ * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
+ * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
+ * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ *
+ * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
+ * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
+ * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
+ * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
+ *
+ * Red Hat Author(s): Behdad Esfahbod
+ */
+
+#ifndef HB_OT_LAYOUT_GSUB_PRIVATE_H
+#define HB_OT_LAYOUT_GSUB_PRIVATE_H
+
+#include "hb-private.h"
+#include "hb-ot-layout.h"
+
+#include "hb-ot-layout-open-private.h"
+#include "hb-ot-layout-gdef-private.h"
+
+
+struct SingleSubstFormat1 {
+ /* TODO */
+
+ private:
+ USHORT substFormat; /* Format identifier--format = 1 */
+ Offset coverage; /* Offset to Coverage table--from
+ * beginning of Substitution table */
+ SHORT deltaGlyphID; /* Add to original GlyphID to get
+ * substitute GlyphID */
+};
+ASSERT_SIZE (SingleSubstFormat1, 6);
+
+struct SingleSubstFormat2 {
+ /* TODO */
+
+ private:
+ USHORT substFormat; /* Format identifier--format = 2 */
+ Offset coverage; /* Offset to Coverage table--from
+ * beginning of Substitution table */
+ USHORT glyphCount; /* Number of GlyphIDs in the Substitute
+ * array */
+ GlyphID substitute[]; /* Array of substitute
+ * GlyphIDs--ordered by Coverage Index */
+};
+ASSERT_SIZE (SingleSubstFormat2, 6);
+
+struct MultipleSubstFormat1 {
+ /* TODO */
+
+ private:
+ USHORT substFormat; /* Format identifier--format = 1 */
+ Offset coverage; /* Offset to Coverage table--from
+ * beginning of Substitution table */
+ USHORT sequenceCount; /* Number of Sequence table offsets in
+ * the Sequence array */
+ Offset sequence[]; /* Array of offsets to Sequence
+ * tables--from beginning of
+ * Substitution table--ordered by
+ * Coverage Index */
+};
+ASSERT_SIZE (MultipleSubstFormat1, 6);
+
+struct Sequence {
+ /* TODO */
+
+ private:
+ USHORT glyphCount; /* Number of GlyphIDs in the Substitute
+ * array. This should always be
+ * greater than 0. */
+ GlyphID substitute[]; /* String of GlyphIDs to substitute */
+};
+DEFINE_NULL_ASSERT_SIZE (Sequence, 2);
+
+struct AlternateSubstFormat1 {
+ /* TODO */
+
+ private:
+ USHORT substFormat; /* Format identifier--format = 1 */
+ Offset coverage; /* Offset to Coverage table--from
+ * beginning of Substitution table */
+ USHORT alternateSetCount; /* Number of AlternateSet tables */
+ Offset alternateSet[]; /* Array of offsets to AlternateSet
+ * tables--from beginning of
+ * Substitution table--ordered by
+ * Coverage Index */
+};
+ASSERT_SIZE (AlternateSubstFormat1, 6);
+
+struct AlternateSet {
+ /* TODO */
+
+ private:
+ USHORT glyphCount; /* Number of GlyphIDs in the Alternate
+ * array */
+ GlyphID alternate[]; /* Array of alternate GlyphIDs--in
+ * arbitrary order */
+};
+DEFINE_NULL_ASSERT_SIZE (AlternateSet, 2);
+
+struct LigatureSubstFormat1 {
+ /* TODO */
+
+ private:
+ USHORT substFormat; /* Format identifier--format = 1 */
+ Offset coverage; /* Offset to Coverage table--from
+ * beginning of Substitution table */
+ USHORT ligSetCount; /* Number of LigatureSet tables */
+ Offset ligatureSet[]; /* Array of offsets to LigatureSet
+ * tables--from beginning of
+ * Substitution table--ordered by
+ * Coverage Index */
+};
+ASSERT_SIZE (LigatureSubstFormat1, 6);
+
+struct LigatureSet {
+ /* TODO */
+
+ private:
+ USHORT ligatureCount; /* Number of Ligature tables */
+ Offset ligature[]; /* Array of offsets to Ligature
+ * tables--from beginning of
+ * LigatureSet table--ordered by
+ * preference */
+};
+DEFINE_NULL_ASSERT_SIZE (LigatureSet, 2);
+
+struct Ligature {
+ /* TODO */
+
+ private:
+ GlyphID ligGlyph; /* GlyphID of ligature to substitute */
+ USHORT compCount; /* Number of components in the ligature */
+ GlyphID component[]; /* Array of component GlyphIDs--start
+ * with the second component--ordered
+ * in writing direction */
+};
+DEFINE_NULL_ASSERT_SIZE (Ligature, 4);
+
+struct SubstLookupRecord {
+ /* TODO */
+
+ private:
+ USHORT sequenceIndex; /* Index into current glyph
+ * sequence--first glyph = 0 */
+ USHORT lookupListIndex; /* Lookup to apply to that
+ * position--zero--based */
+};
+DEFINE_NULL_ASSERT_SIZE (SubstLookupRecord, 4);
+
+struct ContextSubstFormat1 {
+ /* TODO */
+
+ private:
+ USHORT substFormat; /* Format identifier--format = 1 */
+ Offset coverage; /* Offset to Coverage table--from
+ * beginning of Substitution table */
+ USHORT subRuleSetCount; /* Number of SubRuleSet tables--must
+ * equal GlyphCount in Coverage table */
+ Offset subRuleSet[]; /* Array of offsets to SubRuleSet
+ * tables--from beginning of
+ * Substitution table--ordered by
+ * Coverage Index */
+};
+ASSERT_SIZE (ContextSubstFormat1, 6);
+
+struct SubRuleSet {
+ /* TODO */
+
+ private:
+ USHORT subRuleCount; /* Number of SubRule tables */
+ Offset subRule[]; /* Array of offsets to SubRule
+ * tables--from beginning of SubRuleSet
+ * table--ordered by preference */
+};
+DEFINE_NULL_ASSERT_SIZE (SubRuleSet, 2);
+
+struct SubRule {
+ /* TODO */
+
+ private:
+ USHORT glyphCount; /* Total number of glyphs in input
+ * glyph sequence--includes the first
+ * glyph */
+ USHORT substCount; /* Number of SubstLookupRecords */
+ GlyphID input[]; /* Array of input GlyphIDs--start with
+ * second glyph */
+ SubstLookupRecord substLookupRecord[];/* Array of SubstLookupRecords--in
+ * design order */
+};
+DEFINE_NULL_ASSERT_SIZE (SubRule, 4);
+
+struct ContextSubstFormat2 {
+ /* TODO */
+
+ private:
+ USHORT substFormat; /* Format identifier--format = 2 */
+ Offset coverage; /* Offset to Coverage table--from
+ * beginning of Substitution table */
+ Offset classDef; /* Offset to glyph ClassDef table--from
+ * beginning of Substitution table */
+ USHORT subClassSetCnt; /* Number of SubClassSet tables */
+ Offset subClassSet[]; /* Array of offsets to SubClassSet
+ * tables--from beginning of
+ * Substitution table--ordered by
+ * class--may be NULL */
+};
+ASSERT_SIZE (ContextSubstFormat2, 8);
+
+struct SubClassSet {
+ /* TODO */
+
+ private:
+ USHORT subClassRuleCnt; /* Number of SubClassRule tables */
+ Offset subClassRule[]; /* Array of offsets to SubClassRule
+ * tables--from beginning of
+ * SubClassSet--ordered by preference */
+};
+DEFINE_NULL_ASSERT_SIZE (SubClassSet, 2);
+
+struct SubClassRule {
+ /* TODO */
+
+ private:
+ USHORT glyphCount; /* Total number of classes
+ * specified for the context in the
+ * rule--includes the first class */
+ USHORT substCount; /* Number of SubstLookupRecords */
+ USHORT klass[]; /* Array of classes--beginning with the
+ * second class--to be matched to the
+ * input glyph class sequence */
+ SubstLookupRecord substLookupRecord[];/* Array of SubstLookupRecords--in
+ * design order */
+};
+DEFINE_NULL_ASSERT_SIZE (SubClassRule, 4);
+
+struct ContextSubstFormat3 {
+ /* TODO */
+
+ private:
+ USHORT substFormat; /* Format identifier--format = 3 */
+ USHORT glyphCount; /* Number of glyphs in the input glyph
+ * sequence */
+ USHORT substCount; /* Number of SubstLookupRecords */
+ Offset coverage[]; /* Array of offsets to Coverage
+ * table--from beginning of
+ * Substitution table--in glyph
+ * sequence order */
+ SubstLookupRecord substLookupRecord[];/* Array of SubstLookupRecords--in
+ * design order */
+};
+ASSERT_SIZE (ContextSubstFormat3, 6);
+
+struct ChainContextSubstFormat1 {
+ /* TODO */
+
+ private:
+ USHORT substFormat; /* Format identifier--format = 1 */
+ Offset coverage; /* Offset to Coverage table--from
+ * beginning of Substitution table */
+ USHORT chainSubRuleSetCount; /* Number of ChainSubRuleSet
+ * tables--must equal GlyphCount in
+ * Coverage table */
+ Offset chainSubRuleSet[]; /* Array of offsets to ChainSubRuleSet
+ * tables--from beginning of
+ * Substitution table--ordered by
+ * Coverage Index */
+};
+ASSERT_SIZE (ChainContextSubstFormat1, 6);
+
+struct ChainSubRuleSet {
+ /* TODO */
+
+ private:
+ USHORT chainSubRuleCount; /* Number of ChainSubRule tables */
+ Offset chainSubRule[]; /* Array of offsets to ChainSubRule
+ * tables--from beginning of
+ * ChainSubRuleSet table--ordered
+ * by preference */
+};
+DEFINE_NULL_ASSERT_SIZE (ChainSubRuleSet, 2);
+
+struct ChainSubRule {
+ /* TODO */
+
+ private:
+ USHORT backtrackGlyphCount; /* Total number of glyphs in the
+ * backtrack sequence (number of
+ * glyphs to be matched before the
+ * first glyph) */
+ GlyphID backtrack[]; /* Array of backtracking GlyphID's
+ * (to be matched before the input
+ * sequence) */
+ USHORT inputGlyphCount; /* Total number of glyphs in the input
+ * sequence (includes the first glyph) */
+ GlyphID input[]; /* Array of input GlyphIDs (start with
+ * second glyph) */
+ USHORT lookaheadGlyphCount; /* Total number of glyphs in the look
+ * ahead sequence (number of glyphs to
+ * be matched after the input sequence) */
+ GlyphID lookAhead[]; /* Array of lookahead GlyphID's (to be
+ * matched after the input sequence) */
+ USHORT substCount; /* Number of SubstLookupRecords */
+ SubstLookupRecord substLookupRecord[];/* Array of SubstLookupRecords--in
+ * design order) */
+};
+DEFINE_NULL_ASSERT_SIZE (ChainSubRule, 8);
+
+struct ChainContextSubstFormat2 {
+ /* TODO */
+
+ private:
+ USHORT substFormat; /* Format identifier--format = 2 */
+ Offset coverage; /* Offset to Coverage table--from
+ * beginning of Substitution table */
+ Offset backtrackClassDef; /* Offset to glyph ClassDef table
+ * containing backtrack sequence
+ * data--from beginning of Substitution
+ * table */
+ Offset inputClassDef; /* Offset to glyph ClassDef
+ * table containing input sequence
+ * data--from beginning of Substitution
+ * table */
+ Offset lookaheadClassDef; /* Offset to glyph ClassDef table
+ * containing lookahead sequence
+ * data--from beginning of Substitution
+ * table */
+ USHORT chainSubClassSetCnt; /* Number of ChainSubClassSet tables */
+ Offset chainSubClassSet[]; /* Array of offsets to ChainSubClassSet
+ * tables--from beginning of
+ * Substitution table--ordered by input
+ * class--may be NULL */
+};
+ASSERT_SIZE (ChainContextSubstFormat2, 12);
+
+struct ChainSubClassSet {
+ /* TODO */
+
+ private:
+ USHORT chainSubClassRuleCnt; /* Number of ChainSubClassRule tables */
+ Offset chainSubClassRule[]; /* Array of offsets
+ * to ChainSubClassRule
+ * tables--from beginning of
+ * ChainSubClassSet--ordered by
+ * preference */
+};
+DEFINE_NULL_ASSERT_SIZE (ChainSubClassSet, 2);
+
+struct ChainSubClassRule {
+ /* TODO */
+
+ private:
+ USHORT backtrackGlyphCount; /* Total number of glyphs in the
+ * backtrack sequence (number of
+ * glyphs to be matched before the
+ * first glyph) */
+ USHORT backtrack[]; /* Array of backtracking classes(to be
+ * matched before the input sequence) */
+ USHORT inputGlyphCount; /* Total number of classes in the input
+ * sequence (includes the first class) */
+ USHORT input[]; /* Array of input classes(start with
+ * second class; to be matched with
+ * the input glyph sequence) */
+ USHORT lookaheadGlyphCount; /* Total number of classes in the
+ * look ahead sequence (number of
+ * classes to be matched after the
+ * input sequence) */
+ USHORT lookAhead[]; /* Array of lookahead classes(to be
+ * matched after the input sequence) */
+ USHORT substCount; /* Number of SubstLookupRecords */
+ SubstLookupRecord substLookupRecord[];/* Array of SubstLookupRecords--in
+ * design order) */
+};
+DEFINE_NULL_ASSERT_SIZE (ChainSubClassRule, 8);
+
+struct ChainContextSubstFormat3 {
+ /* TODO */
+
+ private:
+ USHORT substFormat; /* Format identifier--format = 3 */
+ USHORT backtrackGlyphCount; /* Number of glyphs in the backtracking
+ * sequence */
+ Offset backtrackCoverage[]; /* Array of offsets to coverage tables
+ * in backtracking sequence, in glyph
+ * sequence order */
+ USHORT inputGlyphCount; /* Number of glyphs in input sequence */
+ Offset inputCoverage[]; /* Array of offsets to coverage
+ * tables in input sequence, in glyph
+ * sequence order */
+ USHORT lookaheadGlyphCount; /* Number of glyphs in lookahead
+ * sequence */
+ Offset lookaheadCoverage[]; /* Array of offsets to coverage tables
+ * in lookahead sequence, in glyph
+ * sequence order */
+ USHORT substCount; /* Number of SubstLookupRecords */
+ SubstLookupRecord substLookupRecord[];/* Array of SubstLookupRecords--in
+ * design order */
+};
+ASSERT_SIZE (ChainContextSubstFormat3, 10);
+
+struct ExtensionSubstFormat1 {
+ /* TODO */
+
+ private:
+ USHORT substFormat; /* Format identifier. Set to 1. */
+ USHORT extensionLookupType; /* Lookup type of subtable referenced
+ * by ExtensionOffset (i.e. the
+ * extension subtable). */
+ ULONG extensionOffset; /* Offset to the extension subtable,
+ * of lookup type subtable. */
+};
+ASSERT_SIZE (ExtensionSubstFormat1, 8);
+
+struct ReverseChainSingleSubstFormat1 {
+ /* TODO */
+
+ private:
+ USHORT substFormat; /* Format identifier--format = 1 */
+ Offset coverage; /* Offset to Coverage table -- from
+ * beginning of Substitution table */
+ USHORT backtrackGlyphCount; /* Number of glyphs in the backtracking
+ * sequence */
+ Offset backtrackCoverage[]; /* Array of offsets to coverage tables
+ * in backtracking sequence, in glyph
+ * sequence order */
+ USHORT lookaheadGlyphCount; /* Number of glyphs in lookahead
+ * sequence */
+ Offset lookaheadCoverage[]; /* Array of offsets to coverage tables
+ * in lookahead sequence, in glyph
+ * sequence order */
+ USHORT glyphCount; /* Number of GlyphIDs in the Substitute
+ * array */
+ GlyphID substitute[]; /* Array of substitute
+ * GlyphIDs--ordered by Coverage Index */
+};
+ASSERT_SIZE (ReverseChainSingleSubstFormat1, 10);
+
+#endif /* HB_OT_LAYOUT_GSUB_PRIVATE_H */
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