/// <summary>
/// Read the header table from the data stream.
/// </summary>
public static HeaderTable Load(TrueTypeDataBytes data, TrueTypeHeaderTable table)
{
data.Seek(table.Offset);
var version = data.Read32Fixed();
var fontRevision = data.Read32Fixed();
var checkSumAdjustment = data.ReadUnsignedInt();
var magicNumber = data.ReadUnsignedInt();
if (magicNumber != 0x5F0F3CF5)
{
throw new InvalidOperationException("The magic number for this TrueType font was incorrect. Value was: " + magicNumber);
}
var flags = data.ReadUnsignedShort();
var unitsPerEm = data.ReadUnsignedShort();
if (unitsPerEm < 16 || unitsPerEm > 16384)
{
throw new InvalidOperationException($"The units per em for this TrueType font was incorrect, value should be between 16 and 16384 but found {unitsPerEm} istead.");
}
DateTime created;
try
{
created = data.ReadInternationalDate();
}
catch (InvalidFontFormatException)
{
created = DateTime.MinValue;
}
DateTime modified;
try
{
modified = data.ReadInternationalDate();
}
catch (InvalidFontFormatException)
{
modified = DateTime.MinValue;
}
var xMin = data.ReadSignedShort();
var yMin = data.ReadSignedShort();
var xMax = data.ReadSignedShort();
var yMax = data.ReadSignedShort();
var macStyle = data.ReadUnsignedShort();
var lowestRecPpem = data.ReadUnsignedShort();
var fontDirectionHint = data.ReadSignedShort();
var indexToLocFormat = (IndexToLocationTable.EntryFormat)data.ReadSignedShort();
var glyphDataFormat = data.ReadSignedShort();
return(new HeaderTable(table, version, fontRevision, checkSumAdjustment,
magicNumber, flags, unitsPerEm, created, modified,
xMin, yMin, xMax, yMax, macStyle, lowestRecPpem,
fontDirectionHint, indexToLocFormat, glyphDataFormat));
}
public TrueTypeFont Parse(TrueTypeDataBytes data)
{
var version = (decimal)data.Read32Fixed();
int numberOfTables = data.ReadUnsignedShort();
// Read these data points to move to the correct data location.
// ReSharper disable UnusedVariable
int searchRange = data.ReadUnsignedShort();
int entrySelector = data.ReadUnsignedShort();
int rangeShift = data.ReadUnsignedShort();
// ReSharper restore UnusedVariable
var tables = new Dictionary <string, TrueTypeHeaderTable>();
for (var i = 0; i < numberOfTables; i++)
{
var table = ReadTable(data);
if (table.HasValue)
{
tables[table.Value.Tag] = table.Value;
}
}
var result = ParseTables(version, tables, data);
return(result);
}
public static BasicMaximumProfileTable Load(TrueTypeDataBytes data, TrueTypeHeaderTable table)
{
data.Seek(table.Offset);
var version = data.Read32Fixed();
var numberOfGlyphs = data.ReadUnsignedShort();
if (Math.Abs(version - 0.5) < float.Epsilon)
{
return(new BasicMaximumProfileTable(table, version, numberOfGlyphs));
}
var maxPoints = data.ReadUnsignedShort();
var maxContours = data.ReadUnsignedShort();
var maxCompositePoints = data.ReadUnsignedShort();
var maxCompositeContours = data.ReadUnsignedShort();
var maxZones = data.ReadUnsignedShort();
var maxTwilightPoints = data.ReadUnsignedShort();
var maxStorage = data.ReadUnsignedShort();
var maxFunctionDefs = data.ReadUnsignedShort();
var maxInstructionDefs = data.ReadUnsignedShort();
var maxStackElements = data.ReadUnsignedShort();
var maxSizeOfInstructions = data.ReadUnsignedShort();
var maxComponentElements = data.ReadUnsignedShort();
var maxComponentDepth = data.ReadUnsignedShort();
return(new MaximumProfileTable(table, version, numberOfGlyphs, maxPoints,
maxContours, maxCompositePoints, maxCompositeContours, maxZones,
maxTwilightPoints, maxStorage, maxFunctionDefs, maxInstructionDefs,
maxStackElements, maxSizeOfInstructions, maxComponentElements,
maxComponentDepth));
}
internal static NameTable GetNameTable(TrueTypeDataBytes data)
{
if (data == null)
{
throw new ArgumentNullException(nameof(data));
}
// Read these data points to move to the correct data location.
data.Read32Fixed();
int numberOfTables = data.ReadUnsignedShort();
data.ReadUnsignedShort();
data.ReadUnsignedShort();
data.ReadUnsignedShort();
TrueTypeHeaderTable?name = null;
for (var i = 0; i < numberOfTables; i++)
{
var tableHeader = ReadTable(data);
if (tableHeader.HasValue && tableHeader.Value.Tag == TrueTypeHeaderTable.Name)
{
name = tableHeader;
break;
}
}
if (!name.HasValue)
{
return(null);
}
return(TableParser.Parse <NameTable>(name.Value, data, new TableRegister.Builder()));
}
public static PostScriptTable Load(TrueTypeDataBytes data, TrueTypeHeaderTable table, BasicMaximumProfileTable maximumProfileTable)
{
data.Seek(table.Offset);
var formatType = data.Read32Fixed();
var italicAngle = data.Read32Fixed();
var underlinePosition = data.ReadSignedShort();
var underlineThickness = data.ReadSignedShort();
var isFixedPitch = data.ReadUnsignedInt();
var minMemType42 = data.ReadUnsignedInt();
var maxMemType42 = data.ReadUnsignedInt();
var mimMemType1 = data.ReadUnsignedInt();
var maxMemType1 = data.ReadUnsignedInt();
var glyphNames = GetGlyphNamesByFormat(data, maximumProfileTable, formatType);
return(new PostScriptTable(table, (decimal)formatType, (decimal)italicAngle,
underlinePosition, underlineThickness, isFixedPitch,
minMemType42, maxMemType42, mimMemType1,
maxMemType1, glyphNames));
}
public TrueTypeFont Parse(TrueTypeDataBytes data)
{
var version = (decimal)data.Read32Fixed();
int numberOfTables = data.ReadUnsignedShort();
int searchRange = data.ReadUnsignedShort();
int entrySelector = data.ReadUnsignedShort();
int rangeShift = data.ReadUnsignedShort();
var tables = new Dictionary <string, TrueTypeHeaderTable>();
for (var i = 0; i < numberOfTables; i++)
{
var table = ReadTable(data);
if (table.HasValue)
{
tables[table.Value.Tag] = table.Value;
}
}
var result = ParseTables(version, tables, data);
return(result);
}