466 lines
15 KiB
C++
466 lines
15 KiB
C++
/*
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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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#ifndef HB_OT_LAYOUT_GSUB_PRIVATE_H
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#define HB_OT_LAYOUT_GSUB_PRIVATE_H
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#include "hb-ot-layout-private.h"
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#include "hb-ot-layout-open-private.h"
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#include "hb-ot-layout-gdef-private.h"
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struct SingleSubstFormat1 {
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/* TODO */
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private:
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USHORT substFormat; /* Format identifier--format = 1 */
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Offset coverage; /* Offset to Coverage table--from
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* beginning of Substitution table */
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SHORT deltaGlyphID; /* Add to original GlyphID to get
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* substitute GlyphID */
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};
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ASSERT_SIZE (SingleSubstFormat1, 6);
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struct SingleSubstFormat2 {
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/* TODO */
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private:
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USHORT substFormat; /* Format identifier--format = 2 */
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Offset coverage; /* Offset to Coverage table--from
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* beginning of Substitution table */
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USHORT glyphCount; /* Number of GlyphIDs in the Substitute
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* array */
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GlyphID substitute[]; /* Array of substitute
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* GlyphIDs--ordered by Coverage Index */
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};
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ASSERT_SIZE (SingleSubstFormat2, 6);
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struct MultipleSubstFormat1 {
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/* TODO */
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private:
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USHORT substFormat; /* Format identifier--format = 1 */
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Offset coverage; /* Offset to Coverage table--from
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* beginning of Substitution table */
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USHORT sequenceCount; /* Number of Sequence table offsets in
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* the Sequence array */
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Offset sequence[]; /* Array of offsets to Sequence
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* tables--from beginning of
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* Substitution table--ordered by
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* Coverage Index */
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};
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ASSERT_SIZE (MultipleSubstFormat1, 6);
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struct Sequence {
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/* TODO */
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private:
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USHORT glyphCount; /* Number of GlyphIDs in the Substitute
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* array. This should always be
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* greater than 0. */
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GlyphID substitute[]; /* String of GlyphIDs to substitute */
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};
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DEFINE_NULL_ASSERT_SIZE (Sequence, 2);
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struct AlternateSubstFormat1 {
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/* TODO */
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private:
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USHORT substFormat; /* Format identifier--format = 1 */
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Offset coverage; /* Offset to Coverage table--from
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* beginning of Substitution table */
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USHORT alternateSetCount; /* Number of AlternateSet tables */
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Offset alternateSet[]; /* Array of offsets to AlternateSet
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* tables--from beginning of
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* Substitution table--ordered by
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* Coverage Index */
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};
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ASSERT_SIZE (AlternateSubstFormat1, 6);
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struct AlternateSet {
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/* TODO */
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private:
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USHORT glyphCount; /* Number of GlyphIDs in the Alternate
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* array */
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GlyphID alternate[]; /* Array of alternate GlyphIDs--in
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* arbitrary order */
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};
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DEFINE_NULL_ASSERT_SIZE (AlternateSet, 2);
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struct LigatureSubstFormat1 {
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/* TODO */
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private:
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USHORT substFormat; /* Format identifier--format = 1 */
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Offset coverage; /* Offset to Coverage table--from
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* beginning of Substitution table */
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USHORT ligSetCount; /* Number of LigatureSet tables */
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Offset ligatureSet[]; /* Array of offsets to LigatureSet
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* tables--from beginning of
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* Substitution table--ordered by
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* Coverage Index */
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};
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ASSERT_SIZE (LigatureSubstFormat1, 6);
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struct LigatureSet {
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/* TODO */
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private:
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USHORT ligatureCount; /* Number of Ligature tables */
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Offset ligature[]; /* Array of offsets to Ligature
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* tables--from beginning of
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* LigatureSet table--ordered by
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* preference */
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};
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DEFINE_NULL_ASSERT_SIZE (LigatureSet, 2);
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struct Ligature {
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/* TODO */
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private:
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GlyphID ligGlyph; /* GlyphID of ligature to substitute */
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USHORT compCount; /* Number of components in the ligature */
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GlyphID component[]; /* Array of component GlyphIDs--start
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* with the second component--ordered
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* in writing direction */
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};
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DEFINE_NULL_ASSERT_SIZE (Ligature, 4);
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struct SubstLookupRecord {
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/* TODO */
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private:
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USHORT sequenceIndex; /* Index into current glyph
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* sequence--first glyph = 0 */
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USHORT lookupListIndex; /* Lookup to apply to that
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* position--zero--based */
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};
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DEFINE_NULL_ASSERT_SIZE (SubstLookupRecord, 4);
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struct ContextSubstFormat1 {
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/* TODO */
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private:
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USHORT substFormat; /* Format identifier--format = 1 */
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Offset coverage; /* Offset to Coverage table--from
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* beginning of Substitution table */
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USHORT subRuleSetCount; /* Number of SubRuleSet tables--must
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* equal GlyphCount in Coverage table */
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Offset subRuleSet[]; /* Array of offsets to SubRuleSet
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* tables--from beginning of
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* Substitution table--ordered by
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* Coverage Index */
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};
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ASSERT_SIZE (ContextSubstFormat1, 6);
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struct SubRuleSet {
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/* TODO */
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private:
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USHORT subRuleCount; /* Number of SubRule tables */
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Offset subRule[]; /* Array of offsets to SubRule
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* tables--from beginning of SubRuleSet
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* table--ordered by preference */
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};
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DEFINE_NULL_ASSERT_SIZE (SubRuleSet, 2);
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struct SubRule {
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/* TODO */
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private:
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USHORT glyphCount; /* Total number of glyphs in input
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* glyph sequence--includes the first
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* glyph */
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USHORT substCount; /* Number of SubstLookupRecords */
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GlyphID input[]; /* Array of input GlyphIDs--start with
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* second glyph */
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SubstLookupRecord substLookupRecord[];/* Array of SubstLookupRecords--in
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* design order */
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};
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DEFINE_NULL_ASSERT_SIZE (SubRule, 4);
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struct ContextSubstFormat2 {
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/* TODO */
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private:
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USHORT substFormat; /* Format identifier--format = 2 */
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Offset coverage; /* Offset to Coverage table--from
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* beginning of Substitution table */
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Offset classDef; /* Offset to glyph ClassDef table--from
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* beginning of Substitution table */
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USHORT subClassSetCnt; /* Number of SubClassSet tables */
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Offset subClassSet[]; /* Array of offsets to SubClassSet
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* tables--from beginning of
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* Substitution table--ordered by
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* class--may be NULL */
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};
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ASSERT_SIZE (ContextSubstFormat2, 8);
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struct SubClassSet {
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/* TODO */
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private:
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USHORT subClassRuleCnt; /* Number of SubClassRule tables */
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Offset subClassRule[]; /* Array of offsets to SubClassRule
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* tables--from beginning of
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* SubClassSet--ordered by preference */
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};
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DEFINE_NULL_ASSERT_SIZE (SubClassSet, 2);
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struct SubClassRule {
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/* TODO */
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private:
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USHORT glyphCount; /* Total number of classes
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* specified for the context in the
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* rule--includes the first class */
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USHORT substCount; /* Number of SubstLookupRecords */
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USHORT klass[]; /* Array of classes--beginning with the
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* second class--to be matched to the
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* input glyph class sequence */
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SubstLookupRecord substLookupRecord[];/* Array of SubstLookupRecords--in
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* design order */
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};
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DEFINE_NULL_ASSERT_SIZE (SubClassRule, 4);
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struct ContextSubstFormat3 {
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/* TODO */
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private:
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USHORT substFormat; /* Format identifier--format = 3 */
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USHORT glyphCount; /* Number of glyphs in the input glyph
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* sequence */
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USHORT substCount; /* Number of SubstLookupRecords */
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Offset coverage[]; /* Array of offsets to Coverage
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* table--from beginning of
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* Substitution table--in glyph
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* sequence order */
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SubstLookupRecord substLookupRecord[];/* Array of SubstLookupRecords--in
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* design order */
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};
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ASSERT_SIZE (ContextSubstFormat3, 6);
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struct ChainContextSubstFormat1 {
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/* TODO */
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private:
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USHORT substFormat; /* Format identifier--format = 1 */
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Offset coverage; /* Offset to Coverage table--from
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* beginning of Substitution table */
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USHORT chainSubRuleSetCount; /* Number of ChainSubRuleSet
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* tables--must equal GlyphCount in
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* Coverage table */
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Offset chainSubRuleSet[]; /* Array of offsets to ChainSubRuleSet
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* tables--from beginning of
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* Substitution table--ordered by
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* Coverage Index */
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};
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ASSERT_SIZE (ChainContextSubstFormat1, 6);
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struct ChainSubRuleSet {
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/* TODO */
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private:
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USHORT chainSubRuleCount; /* Number of ChainSubRule tables */
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Offset chainSubRule[]; /* Array of offsets to ChainSubRule
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* tables--from beginning of
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* ChainSubRuleSet table--ordered
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* by preference */
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};
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DEFINE_NULL_ASSERT_SIZE (ChainSubRuleSet, 2);
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struct ChainSubRule {
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/* TODO */
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private:
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USHORT backtrackGlyphCount; /* Total number of glyphs in the
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* backtrack sequence (number of
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* glyphs to be matched before the
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* first glyph) */
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GlyphID backtrack[]; /* Array of backtracking GlyphID's
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* (to be matched before the input
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* sequence) */
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USHORT inputGlyphCount; /* Total number of glyphs in the input
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* sequence (includes the first glyph) */
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GlyphID input[]; /* Array of input GlyphIDs (start with
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* second glyph) */
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USHORT lookaheadGlyphCount; /* Total number of glyphs in the look
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* ahead sequence (number of glyphs to
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* be matched after the input sequence) */
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GlyphID lookAhead[]; /* Array of lookahead GlyphID's (to be
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* matched after the input sequence) */
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USHORT substCount; /* Number of SubstLookupRecords */
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SubstLookupRecord substLookupRecord[];/* Array of SubstLookupRecords--in
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* design order) */
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};
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DEFINE_NULL_ASSERT_SIZE (ChainSubRule, 8);
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struct ChainContextSubstFormat2 {
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/* TODO */
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private:
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USHORT substFormat; /* Format identifier--format = 2 */
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Offset coverage; /* Offset to Coverage table--from
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* beginning of Substitution table */
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Offset backtrackClassDef; /* Offset to glyph ClassDef table
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* containing backtrack sequence
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* data--from beginning of Substitution
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* table */
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Offset inputClassDef; /* Offset to glyph ClassDef
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* table containing input sequence
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* data--from beginning of Substitution
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* table */
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Offset lookaheadClassDef; /* Offset to glyph ClassDef table
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* containing lookahead sequence
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* data--from beginning of Substitution
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* table */
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USHORT chainSubClassSetCnt; /* Number of ChainSubClassSet tables */
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Offset chainSubClassSet[]; /* Array of offsets to ChainSubClassSet
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* tables--from beginning of
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* Substitution table--ordered by input
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* class--may be NULL */
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};
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ASSERT_SIZE (ChainContextSubstFormat2, 12);
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struct ChainSubClassSet {
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/* TODO */
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private:
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USHORT chainSubClassRuleCnt; /* Number of ChainSubClassRule tables */
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Offset chainSubClassRule[]; /* Array of offsets
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* to ChainSubClassRule
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* tables--from beginning of
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* ChainSubClassSet--ordered by
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* preference */
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};
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DEFINE_NULL_ASSERT_SIZE (ChainSubClassSet, 2);
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struct ChainSubClassRule {
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/* TODO */
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private:
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USHORT backtrackGlyphCount; /* Total number of glyphs in the
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* backtrack sequence (number of
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* glyphs to be matched before the
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* first glyph) */
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USHORT backtrack[]; /* Array of backtracking classes(to be
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* matched before the input sequence) */
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USHORT inputGlyphCount; /* Total number of classes in the input
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* sequence (includes the first class) */
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USHORT input[]; /* Array of input classes(start with
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* second class; to be matched with
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* the input glyph sequence) */
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USHORT lookaheadGlyphCount; /* Total number of classes in the
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* look ahead sequence (number of
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* classes to be matched after the
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* input sequence) */
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USHORT lookAhead[]; /* Array of lookahead classes(to be
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* matched after the input sequence) */
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USHORT substCount; /* Number of SubstLookupRecords */
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SubstLookupRecord substLookupRecord[];/* Array of SubstLookupRecords--in
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* design order) */
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};
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DEFINE_NULL_ASSERT_SIZE (ChainSubClassRule, 8);
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struct ChainContextSubstFormat3 {
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/* TODO */
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private:
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USHORT substFormat; /* Format identifier--format = 3 */
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USHORT backtrackGlyphCount; /* Number of glyphs in the backtracking
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* sequence */
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Offset backtrackCoverage[]; /* Array of offsets to coverage tables
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* in backtracking sequence, in glyph
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* sequence order */
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USHORT inputGlyphCount; /* Number of glyphs in input sequence */
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Offset inputCoverage[]; /* Array of offsets to coverage
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* tables in input sequence, in glyph
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* sequence order */
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USHORT lookaheadGlyphCount; /* Number of glyphs in lookahead
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* sequence */
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Offset lookaheadCoverage[]; /* Array of offsets to coverage tables
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* in lookahead sequence, in glyph
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* sequence order */
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USHORT substCount; /* Number of SubstLookupRecords */
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SubstLookupRecord substLookupRecord[];/* Array of SubstLookupRecords--in
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* design order */
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};
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ASSERT_SIZE (ChainContextSubstFormat3, 10);
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struct ExtensionSubstFormat1 {
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/* TODO */
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private:
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USHORT substFormat; /* Format identifier. Set to 1. */
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USHORT extensionLookupType; /* Lookup type of subtable referenced
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* by ExtensionOffset (i.e. the
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* extension subtable). */
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ULONG extensionOffset; /* Offset to the extension subtable,
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* of lookup type subtable. */
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};
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ASSERT_SIZE (ExtensionSubstFormat1, 8);
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struct ReverseChainSingleSubstFormat1 {
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/* TODO */
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private:
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USHORT substFormat; /* Format identifier--format = 1 */
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Offset coverage; /* Offset to Coverage table -- from
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* beginning of Substitution table */
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USHORT backtrackGlyphCount; /* Number of glyphs in the backtracking
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* sequence */
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Offset backtrackCoverage[]; /* Array of offsets to coverage tables
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* in backtracking sequence, in glyph
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* sequence order */
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USHORT lookaheadGlyphCount; /* Number of glyphs in lookahead
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* sequence */
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Offset lookaheadCoverage[]; /* Array of offsets to coverage tables
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* in lookahead sequence, in glyph
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* sequence order */
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USHORT glyphCount; /* Number of GlyphIDs in the Substitute
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* array */
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GlyphID substitute[]; /* Array of substitute
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* GlyphIDs--ordered by Coverage Index */
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};
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ASSERT_SIZE (ReverseChainSingleSubstFormat1, 10);
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/*
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* GSUB
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*/
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struct GSUB : GSUBGPOS {
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static const hb_tag_t Tag = HB_TAG ('G','S','U','B');
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STATIC_DEFINE_GET_FOR_DATA (GSUB);
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/* XXX check version here? */
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};
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DEFINE_NULL_ALIAS (GSUB, GSUBGPOS);
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#endif /* HB_OT_LAYOUT_GSUB_PRIVATE_H */
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