// Not used. This value should be equal to glyph count in Coverage.
// Keeping it for future reference
//private ushort AlternateSetCount(FontTable Table)
//{
// return Table.GetUShort(offset + offsetAlternateSetCount);
//}
private AlternateSetTable AlternateSet(FontTable Table, int index)
{
return(new AlternateSetTable(offset +
Table.GetUShort(offset +
offsetAlternateSets +
index * sizeAlternateSetOffset)
));
}
// Not used. This value should be equal to glyph count in Coverage.
// Keeping it for future reference
//private ushort SequenceCount(FontTable Table)
//{
// return Table.GetUShort(offset + offsetSequenceCount);
//}
private MultipleSubstitutionSequenceTable Sequence(FontTable Table, int Index)
{
return(new MultipleSubstitutionSequenceTable(
offset +
Table.GetUShort(offset +
offsetSequenceArray +
Index * sizeSequenceOffset)
));
}
public ushort Alternate(FontTable Table, uint FeatureParam)
{
Invariant.Assert(FeatureParam > 0); // Parameter 0 means feautre is disabled.
//Should be filtered out in GetNextEnabledGlyphRange
// Off by one - alternate number 1 is stored under index 0
uint index = FeatureParam - 1;
if (index >= GlyphCount(Table))
{
return(AlternateSubstitutionSubtable.InvalidAlternateGlyph);
}
return(Table.GetUShort(offset + offsetGlyphs + (ushort)index * sizeGlyph));
}
private LigatureSetTable LigatureSet(FontTable Table, ushort Index)
{
return new LigatureSetTable(offset+Table.GetUShort(offset+
offsetLigatureSetArray +
Index * sizeLigatureSet));
}
public LigatureTable Ligature(FontTable Table, ushort Index)
{
return new LigatureTable(offset + Table.GetUShort(offset +
offsetLigatureArray +
Index * sizeLigatureOffset));
}
public LigatureTable Ligature(FontTable Table, ushort Index)
{
return(new LigatureTable(offset + Table.GetUShort(offset +
offsetLigatureArray +
Index * sizeLigatureOffset)));
}
public CoverageChainingSubtable(FontTable Table, int Offset)
{
offset = Offset;
offsetInputGlyphCount = offsetBacktrackGlyphCount + sizeGlyphCount +
Table.GetUShort(offset+offsetBacktrackGlyphCount) *
sizeCoverageOffset;
offsetLookaheadGlyphCount = offsetInputGlyphCount + sizeGlyphCount +
Table.GetUShort(offset+offsetInputGlyphCount) *
sizeCoverageOffset;
}
public ushort GlyphCount(FontTable Table)
{
return Table.GetUShort(offset + offsetGlyphCount);
}
public static ushort GlyphCount(FontTable Table, int Offset)
{
return Table.GetUShort(Offset);
}
// Not used. This value should be equal to glyph count in Coverage.
// Keeping it for future reference
//private ushort Foramt2GlyphCount(FontTable Table)
//{
// Debug.Assert(Format(Table)==2);
// return Table.GetUShort(offset + offsetFormat2GlyphCount);
//}
private ushort Format2SubstituteGlyphId(FontTable Table, ushort Index)
{
Invariant.Assert(Format(Table) == 2);
return(Table.GetUShort(offset + offsetFormat2SubstitutehArray +
Index * sizeFormat2SubstituteSize));
}
public ushort Format(FontTable Table)
{
return Table.GetUShort(offset + offsetFormat);
}
public ushort Glyph(FontTable Table, ushort index)
{
return(Table.GetUShort(offset + offsetGlyphArray + index * sizeGlyphId));
}
private LigatureSetTable LigatureSet(FontTable Table, ushort Index)
{
return(new LigatureSetTable(offset + Table.GetUShort(offset +
offsetLigatureSetArray +
Index * sizeLigatureSet)));
}
public ushort Component(FontTable Table, ushort Index)
{
//LigaTable includes comps from 1 to N. So, (Index-1)
return(Table.GetUShort(offset + offsetComponentArray +
(Index - 1) * sizeComponent));
}
public ushort ComponentCount(FontTable Table)
{
return(Table.GetUShort(offset + offsetComponentCount));
}
public ushort LigatureGlyph(FontTable Table)
{
return(Table.GetUShort(offset + offsetLigatureGlyph));
}
public ushort ComponentCount(FontTable Table)
{
return Table.GetUShort(offset + offsetComponentCount);
}
public ushort Format(FontTable Table)
{
return(Table.GetUShort(offset + offsetFormat));
}
public ushort Glyph(FontTable Table, ushort index)
{
return Table.GetUShort(offset + offsetGlyphArray + index * sizeGlyphId);
}
private CoverageTable Coverage(FontTable Table)
{
return(new CoverageTable(offset + Table.GetUShort(offset + offsetCoverage)));
}
// Not used. This value should be equal to glyph count in Coverage.
// Keeping it for future reference
//private ushort Foramt2GlyphCount(FontTable Table)
//{
// Debug.Assert(Format(Table)==2);
// return Table.GetUShort(offset + offsetFormat2GlyphCount);
//}
private ushort Format2SubstituteGlyphId(FontTable Table,ushort Index)
{
Invariant.Assert(Format(Table)==2);
return Table.GetUShort(offset + offsetFormat2SubstitutehArray +
Index * sizeFormat2SubstituteSize);
}
public ContextualLookupRecords ContextualLookups(FontTable Table, int CurrentOffset)
{
return new ContextualLookupRecords(CurrentOffset + sizeCount,
Table.GetUShort(CurrentOffset));
}
private ushort LigatureSetCount(FontTable Table)
{
return(Table.GetUShort(offset + offsetLigatureSetCount));
}
public CoverageTable LookaheadCoverage(FontTable Table, ushort Index)
{
return new CoverageTable(offset +
Table.GetUShort(offset+
offsetLookaheadGlyphCount +
sizeGlyphCount +
Index*sizeCoverageOffset)
);
}
public static ushort ClassId(FontTable Table, int Offset)
{
return Table.GetUShort(Offset);
}
public ushort LigatureCount(FontTable Table)
{
return(Table.GetUShort(offset + offsetLigatureCount));
}
public CoverageTable BacktrackCoverage(FontTable Table, ushort Index)
{
return new CoverageTable(offset +
Table.GetUShort(offset+
offsetBacktrackGlyphCount +
sizeGlyphCount +
Index*sizeCoverageOffset)
);
}
public ushort GlyphCount(FontTable Table)
{
return(Table.GetUShort(offset + offsetGlyphCount));
}
public ContextualLookupRecords ContextualLookups(FontTable Table)
{
int recordCountOffset = offset + offsetLookaheadGlyphCount + sizeGlyphCount +
LookaheadGlyphCount(Table) * sizeCoverageOffset;
return new ContextualLookupRecords(recordCountOffset+sizeGlyphCount,
Table.GetUShort(recordCountOffset));
}
private ushort LookupIndex(FontTable Table, ushort Index)
{
return Table.GetUShort(offset + Index*sizeLookupRecord + offsetLookupIndex);
}
private ushort LigatureSetCount(FontTable Table)
{
return Table.GetUShort(offset + offsetLigatureSetCount);
}
private ClassDefTable BacktrackClassDef(FontTable Table)
{
return new ClassDefTable(offset +
Table.GetUShort(offset +
offsetBacktrackClassDef)
);
}
public ushort LigatureCount(FontTable Table)
{
return Table.GetUShort(offset + offsetLigatureCount);
}
private ClassDefTable InputClassDef(FontTable Table)
{
return new ClassDefTable(offset +
Table.GetUShort(offset +
offsetInputClassDef)
);
}
public ushort LigatureGlyph(FontTable Table)
{
return Table.GetUShort(offset + offsetLigatureGlyph);
}
private ClassDefTable LookaheadClassDef(FontTable Table)
{
return new ClassDefTable(offset +
Table.GetUShort(offset +
offsetLookaheadClassDef)
);
}
public ushort Component(FontTable Table, ushort Index)
{
//LigaTable includes comps from 1 to N. So, (Index-1)
return Table.GetUShort(offset + offsetComponentArray +
(Index-1) * sizeComponent);
}
private ushort ClassSetCount(FontTable Table)
{
return Table.GetUShort(offset + offsetSubClassSetCount);
}
// Not used. This value should be equal to glyph count in Coverage.
// Keeping it for future reference
//private ushort SequenceCount(FontTable Table)
//{
// return Table.GetUShort(offset + offsetSequenceCount);
//}
private MultipleSubstitutionSequenceTable Sequence(FontTable Table, int Index)
{
return new MultipleSubstitutionSequenceTable(
offset +
Table.GetUShort(offset +
offsetSequenceArray +
Index * sizeSequenceOffset)
);
}
private SubClassSet ClassSet(FontTable Table, ushort Index)
{
int ClassSetOffset = Table.GetUShort(offset + offsetSubClassSetArray +
Index * sizeClassSetOffset);
if (ClassSetOffset==0)
return new SubClassSet(FontTable.InvalidOffset);
else
return new SubClassSet(offset + ClassSetOffset);
}
private CoverageTable Coverage(FontTable Table)
{
return new CoverageTable(offset + Table.GetUShort(offset + offsetCoverage));
}
public ushort RuleCount(FontTable Table)
{
return Table.GetUShort(offset+offsetRuleCount);
}
// Not used. This value should be equal to glyph count in Coverage.
// Keeping it for future reference
//private ushort AlternateSetCount(FontTable Table)
//{
// return Table.GetUShort(offset + offsetAlternateSetCount);
//}
private AlternateSetTable AlternateSet(FontTable Table, int index)
{
return new AlternateSetTable(offset +
Table.GetUShort(offset +
offsetAlternateSets +
index * sizeAlternateSetOffset)
);
}
public SubClassRule Rule(FontTable Table, ushort Index)
{
return new SubClassRule(offset + Table.GetUShort(offset + offsetRuleArray +
Index*sizeRuleOffset));
}
public ushort Alternate(FontTable Table, uint FeatureParam)
{
Invariant.Assert(FeatureParam > 0); // Parameter 0 means feautre is disabled.
//Should be filtered out in GetNextEnabledGlyphRange
// Off by one - alternate number 1 is stored under index 0
uint index = FeatureParam - 1;
if (index >= GlyphCount(Table))
{
return AlternateSubstitutionSubtable.InvalidAlternateGlyph;
}
return Table.GetUShort(offset + offsetGlyphs + (ushort)index*sizeGlyph);
}
private ushort Format(FontTable Table)
{
return Table.GetUShort(offset + offsetFormat);
}
