public GsubWorkerForBengali(ICmapLookup cmapLookup, GsubData gsubData)
{
this.cmapLookup = cmapLookup;
this.gsubData = gsubData;
beforeHalfGlyphIds = GetBeforeHalfGlyphIds();
beforeAndAfterSpanGlyphIds = GetBeforeAndAfterSpanGlyphIds();
}
/**
* Creates a new TrueType font for embedding.
*/
public TrueTypeEmbedder(Document document, PdfDictionary dict, TrueTypeFont ttf, bool embedSubset)
{
this.document = document;
this.embedSubset = embedSubset;
this.ttf = ttf;
fontDescriptor = CreateFontDescriptor(ttf);
if (!IsEmbeddingPermitted(ttf))
{
throw new IOException("This font does not permit embedding");
}
if (!embedSubset)
{
// full embedding
PdfStream stream = new PdfStream(ttf.OriginalData);
stream.Header[PdfName.Length] =
stream.Header[PdfName.Length1] = PdfInteger.Get(ttf.OriginalDataSize);
fontDescriptor.FontFile2 = new FontFile(document, stream);
}
dict[PdfName.Type] = PdfName.Font;
dict[PdfName.BaseFont] = new PdfName(ttf.Name);
// choose a Unicode "cmap"
cmapLookup = ttf.GetUnicodeCmapLookup();
}
internal PdfType0Font(PdfDirectObject baseObject) : base(baseObject)
{
gsubData = DefaultGsubData.NO_DATA_FOUND;
cmapLookup = null;
var fonts = Dictionary.Resolve(PdfName.DescendantFonts);
if (!(fonts is PdfArray))
{
throw new IOException("Missing descendant font array");
}
var descendantFonts = (PdfArray)fonts;
if (descendantFonts.Count == 0)
{
throw new IOException("Descendant font array is empty");
}
var descendantFontDictBase = descendantFonts.Resolve(0);
if (!(descendantFontDictBase is PdfDictionary))
{
throw new IOException("Missing descendant font dictionary");
}
ReadEncoding();
}
internal PdfType0Font(Document document, TrueTypeFont ttf, bool embedSubset, bool closeTTF, bool vertical)
: base(document, new PdfDictionary())
{
if (vertical)
{
ttf.EnableVerticalSubstitutions();
}
gsubData = ttf.GsubData;
cmapLookup = ttf.GetUnicodeCmapLookup();
embedder = new PdfCIDFontType2Embedder(document, Dictionary, ttf, embedSubset, this, vertical);
CIDFont = embedder.GetCIDFont();
ReadEncoding();
if (closeTTF)
{
if (embedSubset)
{
this.ttf = ttf;
//TODO document.registerTrueTypeFontForClosing(ttf);
}
else
{
// the TTF is fully loaded and it is safe to close the underlying data source
ttf.Dispose();
}
}
}
/**
* Constructor.
*
* @param fontDictionary The font dictionary according to the PDF specification.
* @param parent The parent font.
* @param trueTypeFont The true type font used to create the parent font
* @throws IOException
*/
public CIDFontType2(PdfDirectObject fontDictionary, PdfType0Font parent, TrueTypeFont trueTypeFont)
: base(fontDictionary, parent)
{
FontDescriptor fd = FontDescriptor;
if (trueTypeFont != null)
{
ttf = trueTypeFont;
isEmbedded = true;
isDamaged = false;
}
else
{
bool fontIsDamaged = false;
TrueTypeFont ttfFont = null;
FontFile stream = null;
if (fd != null)
{
// Acrobat looks in FontFile too, even though it is not in the spec, see PDFBOX-2599
stream = fd.FontFile2 ?? fd.FontFile3 ?? fd.FontFile;
}
if (stream != null)
{
try
{
// embedded OTF or TTF
OTFParser otfParser = new OTFParser(true);
ttfFont = otfParser.Parse((Bytes.Buffer)stream.BaseDataObject.ExtractBody(true), fd.FontName);
if (ttfFont is OpenTypeFont otf && otf.IsPostScript)
{
// PDFBOX-3344 contains PostScript outlines instead of TrueType
fontIsDamaged = true;
Debug.WriteLine($"warning: Found CFF/OTF but expected embedded TTF font {fd.FontName}");
}
}
catch (IOException e)
{
fontIsDamaged = true;
Debug.WriteLine($"warning: Could not read embedded OTF for font {BaseFont} {e}");
}
}
isEmbedded = ttfFont != null;
isDamaged = fontIsDamaged;
if (ttfFont == null)
{
ttfFont = FindFontOrSubstitute();
}
ttf = ttfFont;
}
cmapLookup = ttf.GetUnicodeCmapLookup(false);
cid2gid = ReadCIDToGIDMap();
}
public GsubWorker GetGsubWorker(ICmapLookup cmapLookup, GsubData gsubData)
{
switch (gsubData.Language)
{
case Language.beng:
case Language.bng2:
return(new GsubWorkerForBengali(cmapLookup, gsubData));
default:
throw new NotSupportedException(
"The language " + gsubData.Language + " is not yet supported");
}
}
/**
* Creates a subsetter for the given font.
*
* @param ttf the font to be subset
* @param tables optional tables to keep if present
*/
public TTFSubsetter(TrueTypeFont ttf, List <string> tables)
{
this.ttf = ttf;
this.keepTables = tables;
uniToGID = new SortedDictionary <int, int>();
glyphIds = new SortedSet <int>();
// find the best Unicode cmap
this.unicodeCmap = ttf.GetUnicodeCmapLookup();
// always copy GID 0
glyphIds.Add(0);
}
