public static Format4CMapTable Load(TrueTypeDataBytes data, int platformId, int encodingId)
{
// Length in bytes.
var length = data.ReadUnsignedShort();
// Used for sub-tables with a Macintosh platform ID.
var version = data.ReadUnsignedShort();
var doubleSegmentCount = data.ReadUnsignedShort();
// Defines the number of contiguous segments.
var segmentCount = doubleSegmentCount / 2;
// Some crazy sum.
var searchRange = data.ReadUnsignedShort();
var entrySelector = data.ReadUnsignedShort();
var rangeShift = data.ReadUnsignedShort();
// End character codes for each segment.
var endCounts = data.ReadUnsignedShortArray(segmentCount);
// Should be zero.
var reservedPad = data.ReadUnsignedShort();
// Start character codes for each segment.
var startCounts = data.ReadUnsignedShortArray(segmentCount);
// Delta for all character codes in the segment. Contrary to the spec this is actually a short[].
var idDeltas = data.ReadShortArray(segmentCount);
var idRangeOffsets = data.ReadUnsignedShortArray(segmentCount);
const int singleIntsRead = 8;
const int intArraysRead = 8;
// ReSharper disable once ArrangeRedundantParentheses
var remainingBytes = length - ((singleIntsRead * 2) + intArraysRead * segmentCount);
var remainingInts = remainingBytes / 2;
var glyphIndices = data.ReadUnsignedShortArray(remainingInts);
var segments = new Segment[endCounts.Length];
for (int i = 0; i < endCounts.Length; i++)
{
var start = startCounts[i];
var end = endCounts[i];
var delta = idDeltas[i];
var offsets = idRangeOffsets[i];
segments[i] = new Segment(start, end, delta, offsets);
}
return(new Format4CMapTable(platformId, encodingId, version, segments, glyphIndices));
}
private static Glyph ReadSimpleGlyph(TrueTypeDataBytes data, short contourCount, PdfRectangle bounds)
{
var endPointsOfContours = data.ReadUnsignedShortArray(contourCount);
var instructionLength = data.ReadUnsignedShort();
var instructions = 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);
var points = new GlyphPoint[xCoordinates.Length];
for (var i = xCoordinates.Length - 1; i >= 0; i--)
{
var isOnCurve = (flags[i] & SimpleGlyphFlags.OnCurve) == SimpleGlyphFlags.OnCurve;
points[i] = new GlyphPoint(xCoordinates[i], yCoordinates[i], isOnCurve);
}
return(new Glyph(true, instructions, endPointsOfContours, points, bounds));
}
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));
}
public static TrimmedTableMappingCMapTable Load(TrueTypeDataBytes data, TrueTypeCMapPlatform platformId, ushort encodingId)
{
var length = data.ReadUnsignedShort();
var language = data.ReadUnsignedShort();
// First character code in the range.
var firstCode = data.ReadUnsignedShort();
// Number of character codes in the range.
var entryCount = data.ReadUnsignedShort();
var glyphIndices = data.ReadUnsignedShortArray(entryCount);
return(new TrimmedTableMappingCMapTable(platformId, encodingId, firstCode, entryCount, glyphIndices));
}