} // Validate
#endregion
#region Private instance methods
protected override void ReadTable_Internal()
{
// Base class constructor ran partial validations on the table record,
// including checking that the offset and length are within bounds
if ((_validationStatus & OTFile.OTFileValidation_StructureOffsetOutOfRange) != 0)
{
// out of range so can't read anything
return;
}
MemoryStream ms = _parentFont.MemoryStream;
// Get the version and check that before continuing
try
{
ms.Seek(_tableRecord.Offset, SeekOrigin.Begin);
_majorVersion = OTFile.ReadUInt16(ms);
_minorVersion = OTFile.ReadUInt16(ms);
}
catch (OTDataIncompleteReadException e)
{
_validationStatus |= OTFile.OTFileValidation_ReadTrunctated;
throw new OTFileParseException("OT parse error: unable to read " + _tableTag + " table", e);
}
if (_majorVersion != 1)
{
_validationStatus |= OTFile.OTFileValidation_StructureVersionNotSupported;
throw new OTUnknownVersionException("OT parse error: unrecognized " + _tableTag + " version");
}
if (_minorVersion > _hhea_1_latestKnownVersion)
{
_validationStatus |= OTFile.OTFileValidation_StructureMinorVersionUnknown;
}
if (_tableRecord.Length < _hhea_1_0_headerLength)
{
_validationStatus |= OTFile.OTFileValidation_TableLengthTooShort;
}
// Known version, OK to continue
try
{
_ascender = OTFile.ReadOTFword(ms);
_descender = OTFile.ReadOTFword(ms);
_lineGap = OTFile.ReadOTFword(ms);
_advanceWidthMax = OTFile.ReadOTUfword(ms);
_minLeftSideBearing = OTFile.ReadOTFword(ms);
_minRightSideBearing = OTFile.ReadOTFword(ms);
_xMaxExtent = OTFile.ReadOTFword(ms);
_caretSlopeRise = OTFile.ReadInt16(ms);
_caretSlopeRun = OTFile.ReadInt16(ms);
_caretOffset = OTFile.ReadInt16(ms);
_reserved1 = OTFile.ReadInt16(ms);
_reserved2 = OTFile.ReadInt16(ms);
_reserved3 = OTFile.ReadInt16(ms);
_reserved4 = OTFile.ReadInt16(ms);
_metricDataFormat = OTFile.ReadInt16(ms);
_numberOfHMetrics = OTFile.ReadUInt16(ms);
}
catch (OTDataIncompleteReadException e)
{
_validationStatus |= OTFile.OTFileValidation_ReadTrunctated;
throw new OTFileParseException("OT parse error: unable to read " + _tableTag + " table", e);
}
} // ReadTable_Internal
} // Validate
#endregion
#region Private instance methods
protected override void ReadTable_Internal()
{
// Base class constructor ran partial validations on the table record,
// including checking that the offset and length are within bounds
if ((_validationStatus & OTFile.OTFileValidation_StructureOffsetOutOfRange) != 0)
{
// out of range so can't read anything
return;
}
MemoryStream ms = _parentFont.MemoryStream;
// Get the version and check that before continuing
try
{
ms.Seek(_tableRecord.Offset, SeekOrigin.Begin);
_majorVersion = OTFile.ReadUInt16(ms);
_minorVersion = OTFile.ReadUInt16(ms);
}
catch (OTDataIncompleteReadException e)
{
_validationStatus |= OTFile.OTFileValidation_ReadTrunctated;
throw new OTFileParseException("OT parse error: unable to read " + _tableTag + " table", e);
}
if (_majorVersion != 1)
{
_validationStatus |= OTFile.OTFileValidation_StructureVersionNotSupported;
throw new OTUnknownVersionException("OT parse error: unrecognized " + _tableTag + " version");
}
if (_minorVersion > _head_1_latestKnownMinorVersion)
{
_validationStatus |= OTFile.OTFileValidation_StructureMinorVersionUnknown;
}
if (_tableRecord.Length < _head_1_0_headerLength)
{
_validationStatus |= OTFile.OTFileValidation_TableLengthTooShort;
}
// Known version, OK to continue
try
{
_fontRevision = OTFixed.ReadFixed(ms);
_checkSumAdjustment = OTFile.ReadUInt32(ms);
_magicNumber = OTFile.ReadUInt32(ms);
_flagsRaw = OTFile.ReadUInt16(ms);
_unitsPerEm = OTFile.ReadUInt16(ms);
_createdRaw = OTFile.ReadOTLongDateTimeAsInt64(ms);
_modifiedRaw = OTFile.ReadOTLongDateTimeAsInt64(ms);
_xMin = OTFile.ReadInt16(ms);
_yMin = OTFile.ReadInt16(ms);
_xMax = OTFile.ReadInt16(ms);
_yMax = OTFile.ReadInt16(ms);
_macStyleRaw = OTFile.ReadUInt16(ms);
_lowestRecPPEm = OTFile.ReadUInt16(ms);
_fontDirectionHint = OTFile.ReadInt16(ms);
_indexToLocFormat = OTFile.ReadInt16(ms);
_glyphDataFormat = OTFile.ReadInt16(ms);
}
catch (OTDataIncompleteReadException e)
{
_validationStatus |= OTFile.OTFileValidation_ReadTrunctated;
throw new OTFileParseException("OT parse error: unable to read " + _tableTag + " table", e);
}
SetHeadFlagValues(); // set HeadFlags struct values
SetHeadMacStyleValues(); // set HeadMacStyle struct values
} // ReadTable_Internal