/// <summary>
/// Overridden. Gets the glyphs needed to render a full barcode.
/// </summary>
/// <param name="text">Text to convert into bar-code.</param>
/// <returns>A collection of <see cref="T:Glyph"/> objects.</returns>
protected override Glyph[] GetFullBarcode(string text)
{
// Run proposed barcode through validator
Match m = Regex.Match(text, @"^\s*(?<barcode>[0-9]{12})\s*$");
if (!m.Success)
{
throw new ArgumentException("Invalid barcode.");
}
string barcodeText = m.Groups["barcode"].Value;
// Determine parity to use
byte[] parityTable = new byte[]
{
0x00, // OOOOOO
0x0B, // OOEOEE
0x0D, // OOEEOE
0x0E, // OOEEEO
0x13, // OEOOEE
0x19, // OEEOOE
0x1D, // OEEEOE
0x15, // OEOEOE
0x16, // OEOEEO
0x1A, // OEEOEO
};
// Determine parity value for remaining encoding then strip
// after calculating the checksum
char parityDigit = barcodeText[0];
byte parity = parityTable[parityDigit - '0'];
if (Checksum != null)
{
barcodeText += Checksum.GetChecksumChar(barcodeText);
}
barcodeText = barcodeText.Substring(1);
// Build result with composite glyphs
List <Glyph> result = new List <Glyph>();
result.AddRange(Factory.GetGlyphs(barcodeText, true));
// Now translate each composite glyph using the parity
// in the second digit.
// The first two digits are encoded without parity.
int parityIndex = 32;
for (int index = 0; index < result.Count; ++index)
{
// Fetch next glyph
if (result[index] is CompositeGlyph)
{
// Determine effective parity arrangement
byte effectiveParity = (index < 6) ? parity : (byte)0;
CompositeGlyph composite = (CompositeGlyph)result[index];
if ((parityIndex & effectiveParity) == 0)
{
result[index] = composite.First;
}
else
{
result[index] = composite.Second;
}
if (parityIndex > 1)
{
parityIndex /= 2;
}
}
}
// Add start/stop and seperator glyphs
result.Insert(6, Factory.GetRawGlyph('|'));
result.Insert(0, Factory.GetRawGlyph('*'));
result.Add(Factory.GetRawGlyph('*'));
return(result.ToArray());
}