private int WriteBfrange(OutputStream <ByteArrayOutputStream> stream, IList <Glyph> range)
{
if (range.IsEmpty())
{
return(0);
}
stream.WriteInteger(range.Count);
stream.WriteString(" beginbfrange\n");
foreach (Glyph glyph in range)
{
String fromTo = CMapContentParser.ToHex(glyph.GetCode());
stream.WriteString(fromTo);
stream.WriteString(fromTo);
stream.WriteByte('<');
foreach (char ch in glyph.GetChars())
{
stream.WriteString(ToHex4(ch));
}
stream.WriteByte('>');
stream.WriteByte('\n');
}
stream.WriteString("endbfrange\n");
range.Clear();
return(1);
}
/// <summary>Creates a ToUnicode CMap to allow copy and paste from Acrobat.</summary>
/// <param name="metrics">
/// metrics[0] contains the glyph index and metrics[2]
/// contains the Unicode code
/// </param>
/// <returns>the stream representing this CMap or <CODE>null</CODE></returns>
public virtual PdfStream GetToUnicode(Object[] metrics)
{
List <int> unicodeGlyphs = new List <int>(metrics.Length);
for (int i = 0; i < metrics.Length; i++)
{
int[] metric = (int[])metrics[i];
if (fontProgram.GetGlyphByCode(metric[0]).GetChars() != null)
{
unicodeGlyphs.Add(metric[0]);
}
}
if (unicodeGlyphs.Count == 0)
{
return(null);
}
StringBuilder buf = new StringBuilder("/CIDInit /ProcSet findresource begin\n" + "12 dict begin\n" + "begincmap\n"
+ "/CIDSystemInfo\n" + "<< /Registry (Adobe)\n" + "/Ordering (UCS)\n" + "/Supplement 0\n" + ">> def\n"
+ "/CMapName /Adobe-Identity-UCS def\n" + "/CMapType 2 def\n" + "1 begincodespacerange\n" + "<0000><FFFF>\n"
+ "endcodespacerange\n");
int size = 0;
for (int k = 0; k < unicodeGlyphs.Count; ++k)
{
if (size == 0)
{
if (k != 0)
{
buf.Append("endbfrange\n");
}
size = Math.Min(100, unicodeGlyphs.Count - k);
buf.Append(size).Append(" beginbfrange\n");
}
--size;
String fromTo = CMapContentParser.ToHex((int)unicodeGlyphs[k]);
Glyph glyph = fontProgram.GetGlyphByCode((int)unicodeGlyphs[k]);
if (glyph.GetChars() != null)
{
StringBuilder uni = new StringBuilder(glyph.GetChars().Length);
foreach (char ch in glyph.GetChars())
{
uni.Append(ToHex4(ch));
}
buf.Append(fromTo).Append(fromTo).Append('<').Append(uni.ToString()).Append('>').Append('\n');
}
}
buf.Append("endbfrange\n" + "endcmap\n" + "CMapName currentdict /CMap defineresource pop\n" + "end end\n");
PdfStream toUnicode = new PdfStream(PdfEncodings.ConvertToBytes(buf.ToString(), null));
MakeObjectIndirect(toUnicode);
return(toUnicode);
}