コード例 #1
0
        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
            });
        }