private IGlyphTransformationTable ParseSingleSubstitutionTable(int subTableOffset, dynamic fontTable, LookupFlags lookupFlags)
{
var type = typeof(GlyphTypeface).Assembly.GetType("MS.Internal.Shaping.SingleSubstitutionSubtable");
dynamic table = new AccessPrivateWrapper(type.Instantiate(subTableOffset));
ushort format = table.Format(fontTable.Wrapped);
switch (format)
{
case 1:
return(new DeltaSubstitutionTable
{
Coverage = this.ParseCoverageTable(fontTable, new AccessPrivateWrapper(table.Coverage(fontTable.Wrapped))),
GlyphIdDelta = (short)table.Format1DeltaGlyphId(fontTable.Wrapped),
LookupFlags = lookupFlags
});
case 2:
var coverage = (ICoverageTable)this.ParseCoverageTable(fontTable, new AccessPrivateWrapper(table.Coverage(fontTable.Wrapped)));
return(new SimpleReplacementSubstitutionTable
{
Coverage = coverage,
ReplacementGlyphIds =
coverage.CoveredGlyphIds.Keys
.Select(coverageIndex => (ushort)table.Format2SubstituteGlyphId(fontTable.Wrapped, coverageIndex)).ToList(),
LookupFlags = lookupFlags
});
default:
throw new UnknownTableFormatException(type, format);
}
}
private IGlyphTransformationTable ParseMultipleSubstitutionTable(int subTableOffset, dynamic fontTable, LookupFlags lookupFlags)
{
var type = typeof(GlyphTypeface).Assembly.GetType("MS.Internal.Shaping.MultipleSubstitutionSubtable");
dynamic table = new AccessPrivateWrapper(type.Instantiate(subTableOffset));
ushort format = table.Format(fontTable.Wrapped);
if (format != 1)
{
throw new UnknownTableFormatException(type, format);
}
var coverageTable = this.ParseCoverageTable(fontTable, new AccessPrivateWrapper(table.Coverage(fontTable.Wrapped)));
var substitutionSequenceTables = this.GetEnumerableFromInternalList(
() => (ushort)coverageTable.CoveredGlyphIds.Count, i => (dynamic) new AccessPrivateWrapper(table.Sequence(fontTable.Wrapped, i))).ToList();
var sequences = substitutionSequenceTables
.Select(
sequenceTable =>
this.GetEnumerableFromInternalList(
() => sequenceTable.GlyphCount(fontTable.Wrapped),
i => (ushort)sequenceTable.Glyph(fontTable.Wrapped, i))).ToList();
return(new MultipleSubstitutionTable
{
Coverage = this.ParseCoverageTable(fontTable, new AccessPrivateWrapper(table.Coverage(fontTable.Wrapped))),
ReplacementSequences = sequences.ToList(),
LookupFlags = lookupFlags
});
}
private IGlyphTransformationTable ParseMarkToBasePositioningTable(int subTableOffset, dynamic fontTable, LookupFlags lookupFlags)
{
var type = typeof(GlyphTypeface).Assembly.GetType("MS.Internal.Shaping.MarkToBasePositioningSubtable");
dynamic table = new AccessPrivateWrapper(type.Instantiate(subTableOffset));
ushort format = table.Format(fontTable.Wrapped);
if (format != 1)
{
throw new UnknownTableFormatException(type, format);
}
dynamic markArrayTable = new AccessPrivateWrapper(table.Marks(fontTable.Wrapped));
dynamic baseArrayTable = new AccessPrivateWrapper(table.Bases(fontTable.Wrapped));
return(new MarkToBasePositioningTable
{
MarkCoverage = (ICoverageTable)this.ParseCoverageTable(fontTable, new AccessPrivateWrapper(table.MarkCoverage(fontTable.Wrapped))),
BaseCoverage = (ICoverageTable)this.ParseCoverageTable(fontTable, new AccessPrivateWrapper(table.BaseCoverage(fontTable.Wrapped))),
MarkAnchorPoints = this.GetEnumerableFromInternalList(
() => fontTable.GetUShort(markArrayTable.offset),
i =>
new Tuple <ushort, AnchorPoint>(
(ushort)markArrayTable.Class(fontTable.Wrapped, i),
(AnchorPoint)this.ParseAnchor(fontTable, new AccessPrivateWrapper(markArrayTable.MarkAnchor(fontTable.Wrapped, i)))
)).ToList(),
BaseAnchorPoints = this.GetEnumerableFromInternalList(
() => fontTable.GetUShort(baseArrayTable.offset),
i => this.GetEnumerableFromInternalList(
() => table.ClassCount(fontTable.Wrapped),
j => (AnchorPoint)this.ParseAnchor(fontTable, new AccessPrivateWrapper(baseArrayTable.BaseAnchor(fontTable.Wrapped, i, table.ClassCount(fontTable.Wrapped), j)))
).ToList()
).ToList(),
LookupFlags = lookupFlags
});
}
private IGlyphTransformationTable ParseCursivePositioningTable(int subTableOffset, dynamic fontTable, LookupFlags lookupFlags)
{
var type = typeof(GlyphTypeface).Assembly.GetType("MS.Internal.Shaping.CursivePositioningSubtable");
dynamic table = new AccessPrivateWrapper(type.Instantiate(subTableOffset));
ushort format = table.Format(fontTable.Wrapped);
if (format != 1)
{
throw new UnknownTableFormatException(type, format);
}
var coverage = (ICoverageTable)this.ParseCoverageTable(fontTable, new AccessPrivateWrapper(table.Coverage(fontTable.Wrapped)));
var coveredGlyphCount = coverage.CoveredGlyphIds.Count();
return(new CursivePositioningTable
{
Coverage = coverage,
EntryExitRecords =
this.GetEnumerableFromInternalList(
() => (ushort)coveredGlyphCount,
i => Tuple.Create(
(AnchorPoint)this.ParseAnchor(fontTable, new AccessPrivateWrapper(table.EntryAnchor(fontTable.Wrapped, i))),
(AnchorPoint)this.ParseAnchor(fontTable, new AccessPrivateWrapper(table.ExitAnchor(fontTable.Wrapped, i)))
)).ToList(),
LookupFlags = lookupFlags
});
}
private IGlyphTransformationTable ParseSinglePositioningTable(int subTableOffset, dynamic fontTable, LookupFlags lookupFlags)
{
var type = typeof(GlyphTypeface).Assembly.GetType("MS.Internal.Shaping.SinglePositioningSubtable");
dynamic table = new AccessPrivateWrapper(type.Instantiate(subTableOffset));
ushort format = table.Format(fontTable.Wrapped);
switch (format)
{
case 1:
return(new ConstantPositioningTable
{
Coverage = this.ParseCoverageTable(fontTable, new AccessPrivateWrapper(table.Coverage(fontTable.Wrapped))),
PositionChange = this.ParseValueRecord(fontTable, new AccessPrivateWrapper(table.Format1ValueRecord(fontTable.Wrapped))),
LookupFlags = lookupFlags
});
case 2:
var coverage = (ICoverageTable)this.ParseCoverageTable(fontTable, new AccessPrivateWrapper(table.Coverage(fontTable.Wrapped)));
return(new IndividualChangePositioningTable
{
Coverage = coverage,
PositionChanges =
coverage.CoveredGlyphIds.Keys
.Select(coverageIndex => (GlyphPositionChange)this.ParseValueRecord(fontTable, new AccessPrivateWrapper(table.Format2ValueRecord(fontTable.Wrapped, coverageIndex)))).ToList(),
LookupFlags = lookupFlags
});
default:
throw new UnknownTableFormatException(type, format);
}
}
private IGlyphTransformationTable ParsePairPositioningTable(int subTableOffset, dynamic fontTable, LookupFlags lookupFlags)
{
var type = typeof(GlyphTypeface).Assembly.GetType("MS.Internal.Shaping.PairPositioningSubtable");
dynamic table = new AccessPrivateWrapper(type.Instantiate(subTableOffset));
ushort format = table.Format(fontTable.Wrapped);
var coverage = (ICoverageTable)this.ParseCoverageTable(fontTable, new AccessPrivateWrapper(table.Coverage(fontTable.Wrapped)));
var coveredGlyphCount = coverage.CoveredGlyphIds.Count();
switch (format)
{
case 1:
var pairSetTables = this.GetEnumerableFromInternalList(
() => (ushort)coveredGlyphCount,
i => (dynamic) new AccessPrivateWrapper(table.Format1PairSet(fontTable.Wrapped, i))).ToList();
return(new GlyphPairPositioningTable
{
Coverage = coverage,
PairSets =
pairSetTables.Select(pairSet => this.GetEnumerableFromInternalList(
() => (ushort)pairSet.PairValueCount(fontTable.Wrapped),
i => new PositioningPair
{
SecondGlyphID = (ushort)pairSet.PairValueGlyph(fontTable.Wrapped, i),
FirstGlyphPositionChange = this.ParseValueRecord(fontTable, new AccessPrivateWrapper(pairSet.FirstValueRecord(fontTable.Wrapped, i, table.FirstValueFormat(fontTable.Wrapped)))),
SecondGlyphPositionChange = this.ParseValueRecord(fontTable, new AccessPrivateWrapper(pairSet.SecondValueRecord(fontTable.Wrapped, i, table.SecondValueFormat(fontTable.Wrapped)))),
}).ToList()).ToList(),
LookupFlags = lookupFlags
});
case 2:
var class2Count = (ushort)table.Format2Class2Count(fontTable.Wrapped);
return(new ClassPairPositioningTable
{
Coverage = coverage,
FirstClassDef = this.ParseClassDef(fontTable, new AccessPrivateWrapper(table.Format2Class1Table(fontTable.Wrapped))),
SecondClassDef = this.ParseClassDef(fontTable, new AccessPrivateWrapper(table.Format2Class2Table(fontTable.Wrapped))),
PairSets =
(from i in Enumerable.Range(0, (ushort)table.Format2Class1Count(fontTable.Wrapped))
select
(from j in Enumerable.Range(0, class2Count)
select Tuple.Create(
(GlyphPositionChange)this.ParseValueRecord(fontTable, new AccessPrivateWrapper(table.Format2FirstValueRecord(fontTable.Wrapped, class2Count, (ushort)i, (ushort)j))),
(GlyphPositionChange)this.ParseValueRecord(fontTable, new AccessPrivateWrapper(table.Format2SecondValueRecord(fontTable.Wrapped, class2Count, (ushort)i, (ushort)j)))
)).ToList()).ToList(),
LookupFlags = lookupFlags
});
default:
throw new UnknownTableFormatException(type, format);
}
}
private IGlyphTransformationTable ParseReverseChainingSubstitutionTable(int subTableOffset, dynamic fontTable, LookupFlags lookupFlags)
{
var type = typeof(GlyphTypeface).Assembly.GetType("MS.Internal.Shaping.ReverseChainingSubtable");
dynamic table = new AccessPrivateWrapper(type.Instantiate(subTableOffset));
ushort format = table.Format(fontTable.Wrapped);
if (format != 1)
{
throw new UnknownTableFormatException(type, format);
}
var result = new ReverseChainingContextSubstitutionTable
{
Coverage = this.ParseCoverageTable(fontTable, new AccessPrivateWrapper(table.InputCoverage(fontTable.Wrapped)))
};
int currentOffset = table.offset + table.offsetBacktrackGlyphCount;
ushort lookbackCount = table.GlyphCount(fontTable.Wrapped, currentOffset);
currentOffset += 2;
result.LookbackCoverages = this.GetEnumerableFromInternalList(
() => lookbackCount,
i => (ICoverageTable)this.ParseCoverageTable(fontTable, new AccessPrivateWrapper(table.Coverage(fontTable.Wrapped, currentOffset)))
).ToList();
currentOffset += 2 * lookbackCount;
ushort lookaheadCount = table.GlyphCount(fontTable.Wrapped, currentOffset);
currentOffset += 2;
result.LookaheadCoverages = this.GetEnumerableFromInternalList(
() => lookaheadCount,
i => (ICoverageTable)this.ParseCoverageTable(fontTable, new AccessPrivateWrapper(table.Coverage(fontTable.Wrapped, currentOffset)))
).ToList();
currentOffset += 2 * lookaheadCount;
ushort glyphCount = table.GlyphCount(fontTable.Wrapped, currentOffset);
currentOffset += 2;
result.SubstituteGlyphIds = this.GetEnumerableFromInternalList(
() => glyphCount,
i => (ushort)table.Glyph(fontTable.Wrapped, currentOffset)
).ToList();
result.LookupFlags = lookupFlags;
return(result);
}
protected IGlyphTransformationTable ParseChainingSubstitutionTable(int subTableOffset, dynamic fontTable, LookupFlags lookupFlags)
{
var type = typeof(GlyphTypeface).Assembly.GetType("MS.Internal.Shaping.ChainingSubtable");
dynamic table = new AccessPrivateWrapper(type.Instantiate(subTableOffset));
ushort format = table.Format(fontTable.Wrapped);
switch (format)
{
case 1:
return(this.ParseGlyphChainingSubstitutionTable(subTableOffset, fontTable, lookupFlags));
case 2:
return(this.ParseClassChainingSubstitutionTable(subTableOffset, fontTable, lookupFlags));
case 3:
return(this.ParseCoverageChainingSubstitutionTable(subTableOffset, fontTable, lookupFlags));
default:
throw new UnknownTableFormatException(type, format);
}
}
private IGlyphTransformationTable ParseLigatureSubstitutionTable(int subTableOffset, dynamic fontTable, LookupFlags lookupFlags)
{
var type = typeof(GlyphTypeface).Assembly.GetType("MS.Internal.Shaping.LigatureSubstitutionSubtable");
dynamic table = new AccessPrivateWrapper(type.Instantiate(subTableOffset));
ushort format = table.Format(fontTable.Wrapped);
if (format != 1)
{
throw new UnknownTableFormatException(type, format);
}
var ligatureSetTables = this.GetEnumerableFromInternalList(
() => table.LigatureSetCount(fontTable.Wrapped),
i => (dynamic) new AccessPrivateWrapper(table.LigatureSet(fontTable.Wrapped, i))).ToList();
var ligatures = ligatureSetTables
.Select(
ligatureSetTable =>
this.GetEnumerableFromInternalList(
() => ligatureSetTable.LigatureCount(fontTable.Wrapped),
i => (dynamic) new AccessPrivateWrapper(ligatureSetTable.Ligature(fontTable.Wrapped, i)))
.Select(
ligatureTable =>
new Ligature
{
LigatureGlyphId = (ushort)ligatureTable.LigatureGlyph(fontTable.Wrapped),
ComponentGlyphIds = this.GetEnumerableFromInternalList(
() => (ushort)(ligatureTable.ComponentCount(fontTable.Wrapped) - 1),
i => (ushort)ligatureTable.Component(fontTable.Wrapped, (ushort)(i + 1)))
}).ToList()).ToList();
return(new LigatureSubstitutionTable
{
Coverage = this.ParseCoverageTable(fontTable, new AccessPrivateWrapper(table.Coverage(fontTable.Wrapped))),
LigatureSets = ligatures.ToList(),
LookupFlags = lookupFlags
});
}
