protected override void ReadContentFrom(BinaryReader reader)
{
long beginAt = reader.BaseStream.Position;
//Horizontal metrics variations table:
//Type Name Description
//uint16 majorVersion Major version number of the horizontal metrics variations table — set to 1.
//uint16 minorVersion Minor version number of the horizontal metrics variations table — set to 0.
//Offset32 itemVariationStoreOffset Offset in bytes from the start of this table to the item variation store table.
//Offset32 advanceWidthMappingOffset Offset in bytes from the start of this table to the delta-set index mapping for advance widths (may be NULL).
//Offset32 lsbMappingOffset Offset in bytes from the start of this table to the delta - set index mapping for left side bearings(may be NULL).
//Offset32 rsbMappingOffset Offset in bytes from the start of this table to the delta - set index mapping for right side bearings(may be NULL).
ushort majorVersion = reader.ReadUInt16();
ushort minorVersion = reader.ReadUInt16();
uint itemVariationStoreOffset = reader.ReadUInt32();
uint advanceWidthMappingOffset = reader.ReadUInt32();
uint lsbMappingOffset = reader.ReadUInt32();
uint rsbMappingOffset = reader.ReadUInt32();
//
//-----------------------------------------
//itemVariationStore
reader.BaseStream.Position = beginAt + itemVariationStoreOffset;
_itemVartionStore = new ItemVariationStoreTable();
_itemVartionStore.ReadContentFrom(reader);
}
protected override void ReadContentFrom(BinaryReader reader)
{
long startAt = reader.BaseStream.Position;
//Metrics variations table:
//Type Name Description
//uint16 majorVersion Major version number of the metrics variations table — set to 1.
//uint16 minorVersion Minor version number of the metrics variations table — set to 0.
//uint16 (reserved) Not used; set to 0.
//uint16 valueRecordSize The size in bytes of each value record — must be greater than zero.
//uint16 valueRecordCount The number of value records — may be zero.
//Offset16 itemVariationStoreOffset Offset in bytes from the start of this table to the item variation store table.
// If valueRecordCount is zero, set to zero;
// if valueRecordCount is greater than zero, must be greater than zero.
//ValueRecord valueRecords[valueRecordCount] Array of value records that identify target items and the associated delta-set index for each.
// The valueTag records must be in binary order of their valueTag field.
//-----------
//
//The valueRecordSize field indicates the size of each value record.
//Future, minor version updates of the MVAR table may define compatible extensions to the value record format with additional fields.
//**Implementations must use the valueRecordSize field to determine the start of each record.**
//The valueRecords array is an array of value records that identify the target,
//font -wide measures for which variation adjustment data is provided (target items),
//and outer and inner delta-set indices for each item into the item variation store data.
ushort majorVersion = reader.ReadUInt16();
ushort minorVersion = reader.ReadUInt16();
ushort reserved = reader.ReadUInt16();
ushort valueRecordSize = reader.ReadUInt16();
ushort valueRecordCount = reader.ReadUInt16();
ushort itemVariationStoreOffset = reader.ReadUInt16();
valueRecords = new ValueRecord[valueRecordCount];
for (int i = 0; i < valueRecordCount; ++i)
{
long recStartAt = reader.BaseStream.Position;
valueRecords[i] = new ValueRecord(
reader.ReadUInt32(),
reader.ReadUInt16(),
reader.ReadUInt16()
);
reader.BaseStream.Position = recStartAt + valueRecordSize;//**Implementations must use the valueRecordSize field to determine the start of each record.**
}
//
//item variation store table
if (valueRecordCount > 0)
{
reader.BaseStream.Position = startAt + itemVariationStoreOffset;
itemVariationStore = new ItemVariationStoreTable();
itemVariationStore.ReadContentFrom(reader);
}
}