private PDFObject GetWidths(GlyphTypeface glyphTypeface, IIndirectObjectCreator creator,
IDictionary <int, ushort> cmap)
{
PDFArray widths = creator.CreateIndirectArray();
IDictionary <ushort, double> advWidths = glyphTypeface.AdvanceWidths;
for (char ch = (char)firstChar; ch <= lastChar; ch++)
{
int width = 0;
if (subsetCharacters.Contains(ch))
{
ushort gid;
if (cmap.TryGetValue((int)ch, out gid))
{
double widthDouble;
if (advWidths.TryGetValue(gid, out widthDouble))
{
width = (int)(1000 * widthDouble);
}
}
}
widths.Array.Add(new PDFInt(width));
}
return(widths);
}
public override void CreatePDFData(IIndirectObjectCreator creator)
{
if (firstChar > lastChar)
{
firstChar = lastChar = 0;
}
PDFName postScriptFontName = CreatePostScriptFontName(_typeface);
GlyphTypeface glyphTypeface = CreateGlyphTypeface();
IDictionary <int, ushort> cmap = glyphTypeface.CharacterToGlyphMap;
byte[] subsetData = CreateSubsetData(glyphTypeface, cmap);
fontDescriptor = creator.CreateIndirectDictionary();
fontDescriptor.Put("Type", new PDFName("FontDescriptor"));
fontDescriptor.Put("FontName", postScriptFontName);
fontDescriptor.Put("Flags", new PDFInt(IsSymbolic ? 4 : 32));
fontDescriptor.Put("MissingWidth", new PDFInt(250));
AddFontMetrics(fontDescriptor, glyphTypeface, subsetData);
fontDictionary.Put("Type", new PDFName("Font"));
fontDictionary.Put("Subtype", new PDFName("TrueType"));
fontDictionary.Put("BaseFont", postScriptFontName);
if (!IsSymbolic)
{
fontDictionary.Put("Encoding", new PDFName("WinAnsiEncoding"));
}
fontDictionary.Put("FontDescriptor", fontDescriptor);
fontDictionary.Put("Widths", GetWidths(glyphTypeface, creator, cmap));
fontDictionary.Put("FirstChar", new PDFInt(firstChar));
fontDictionary.Put("LastChar", new PDFInt(lastChar));
// fontDict.Put("ToUnicode", );
fontStream = creator.CreateStream(PDFStream.Filter.Flate);
fontDescriptor.Put("FontFile2", fontStream);
fontStream.Data.Write(subsetData, 0, subsetData.Length);
fontStream.StreamDictionary.Put("Length1", new PDFInt(subsetData.Length));
}
public abstract void CreatePDFData(IIndirectObjectCreator creator);
