private IGlyphTransformationTable ParseClassChainingSubstitutionTable(int subTableOffset, dynamic fontTable, LookupFlags lookupFlags)
{
var type = typeof(GlyphTypeface).Assembly.GetType("MS.Internal.Shaping.ClassChainingSubtable");
dynamic table = new AccessPrivateWrapper(type.Instantiate(subTableOffset));
var coverageTable = this.ParseCoverageTable(fontTable, new AccessPrivateWrapper(table.Coverage(fontTable.Wrapped)));
var ruleSetTables = this.GetEnumerableFromInternalList(
() => (ushort)table.ClassSetCount(fontTable.Wrapped),
i => (dynamic) new AccessPrivateWrapper(table.ClassSet(fontTable.Wrapped, i))).ToList();
var LookbackClassDefinition = fontTable.GetUShort(table.offset +
table.offsetBacktrackClassDef) == 0 ? RangeGlyphClassDefinition.CreateEmptyClassDef() : this.ParseClassDef(fontTable, new AccessPrivateWrapper(table.BacktrackClassDef(fontTable.Wrapped)));
var ContextClassDefinitions = this.ParseClassDef(fontTable, new AccessPrivateWrapper(table.InputClassDef(fontTable.Wrapped)));
var LookaheadClassDefinition = fontTable.GetUShort(table.offset +
table.offsetLookaheadClassDef) == 0 ? RangeGlyphClassDefinition.CreateEmptyClassDef() : this.ParseClassDef(fontTable, new AccessPrivateWrapper(table.LookaheadClassDef(fontTable.Wrapped)));
return(new ChainingClassContextTransformationTable
{
Coverage = coverageTable,
LookbackClassDefinition = fontTable.GetUShort(table.offset + table.offsetBacktrackClassDef) == 0 ?
RangeGlyphClassDefinition.CreateEmptyClassDef() :
this.ParseClassDef(fontTable, new AccessPrivateWrapper(table.BacktrackClassDef(fontTable.Wrapped))),
ContextClassDefinitions = this.ParseClassDef(fontTable, new AccessPrivateWrapper(table.InputClassDef(fontTable.Wrapped))),
LookaheadClassDefinition = fontTable.GetUShort(table.offset + table.offsetLookaheadClassDef) == 0 ?
RangeGlyphClassDefinition.CreateEmptyClassDef() :
this.ParseClassDef(fontTable, new AccessPrivateWrapper(table.LookaheadClassDef(fontTable.Wrapped))),
TransformationRules = ruleSetTables
.Select(
ruleSetTable => ruleSetTable.IsNull ?
Enumerable.Empty <ChainingContextTransformationRule>() :
this.GetEnumerableFromInternalList(
() => ruleSetTable.RuleCount(fontTable.Wrapped),
i => (ChainingContextTransformationRule)this.ParseChainingTransformationRule(
fontTable,
new AccessPrivateWrapper(ruleSetTable.Rule(fontTable.Wrapped, i)),
(Func <dynamic, int, ushort>)((ruleTable, index) => (ushort)ruleTable.ClassId(fontTable.Wrapped, index)),
(ushort)i)).ToList()).ToList(),
LookupFlags = lookupFlags
});
}
