public static GlyphDataTable Load(TrueTypeDataBytes data, TrueTypeHeaderTable table, HeaderTable headerTable,
IndexToLocationTable indexToLocationTable)
{
data.Seek(table.Offset);
var offsets = indexToLocationTable.GlyphOffsets;
var entryCount = offsets.Length;
var glyphCount = entryCount - 1;
var glyphs = new IGlyphDescription[glyphCount];
for (var i = 0; i < glyphCount; i++)
{
if (offsets[i] == offsets[i + 1])
{
// empty glyph
continue;
}
data.Seek(offsets[i] + table.Offset);
var contourCount = data.ReadSignedShort();
var minX = data.ReadSignedShort();
var minY = data.ReadSignedShort();
var maxX = data.ReadSignedShort();
var maxY = data.ReadSignedShort();
var bounds = new TrueTypeGlyphBounds(minX, minY, maxX, maxY);
// If the number of contours is greater than or equal zero it's a simple glyph.
if (contourCount >= 0)
{
glyphs[i] = ReadSimpleGlyph(data, contourCount, bounds);
}
else
{
}
}
return(new GlyphDataTable(table, glyphs));
}
private static SimpleGlyphDescription ReadSimpleGlyph(TrueTypeDataBytes data, short contourCount, TrueTypeGlyphBounds bounds)
{
var endPointsOfContours = data.ReadUnsignedShortArray(contourCount);
var instructionLength = data.ReadUnsignedShort();
data.ReadByteArray(instructionLength);
var pointCount = 0;
if (contourCount > 0)
{
pointCount = endPointsOfContours[contourCount - 1] + 1;
}
var flags = ReadFlags(data, pointCount);
var xCoordinates = ReadCoordinates(data, pointCount, flags, SimpleGlyphFlags.XShortVector,
SimpleGlyphFlags.XSignOrSame);
var yCoordinates = ReadCoordinates(data, pointCount, flags, SimpleGlyphFlags.YShortVector,
SimpleGlyphFlags.YSignOrSame);
return(new SimpleGlyphDescription(instructionLength, endPointsOfContours, flags, xCoordinates, yCoordinates));
}
