internal PdfType1Font(PdfDirectObject baseObject) : base(baseObject)
{
codeToBytesMap = new Dictionary <int, byte[]>();
var fd = FontDescriptor;
Type1Font t1 = null;
bool fontIsDamaged = false;
if (fd != null)
{
// a Type1 font may contain a Type1C font
var fontFile3 = fd.FontFile3;
if (fontFile3 != null)
{
throw new ArgumentException("Use PDType1CFont for FontFile3");
}
// or it may contain a PFB
var fontFile = fd.FontFile;
if (fontFile != null)
{
try
{
t1 = LoadType1Font(fontFile);
}
catch (DamagedFontException e)
{
Debug.WriteLine($"warn: Can't read damaged embedded Type1 font {fd.FontName} {e}");
fontIsDamaged = true;
}
catch (IOException e)
{
Debug.WriteLine($"error: Can't read the embedded Type1 font {fd.FontName} {e}");
fontIsDamaged = true;
}
}
}
isEmbedded = t1 != null;
isDamaged = fontIsDamaged;
type1font = t1;
// find a generic font to use for rendering, could be a .pfb, but might be a .ttf
if (type1font != null)
{
genericFont = type1font;
}
else
{
FontMapping <BaseFont> mapping = FontMappers.Instance.GetBaseFont(BaseFont, fd);
genericFont = mapping.Font;
if (mapping.IsFallback)
{
Debug.WriteLine($"warn Using fallback font {genericFont.Name} for {BaseFont}");
}
}
ReadEncoding();
fontMatrixTransform = FontMatrix;
fontMatrixTransform = fontMatrixTransform.PreConcat(SKMatrix.CreateScale(1000, 1000));
}
public PdfType1Font(Document doc, Bytes.IInputStream pfbIn, Encoding encoding) : base(doc)
{
PdfType1FontEmbedder embedder = new PdfType1FontEmbedder(doc, Dictionary, pfbIn, encoding);
this.encoding = encoding;
glyphList = embedder.GlyphList;
type1font = embedder.Type1Font;
genericFont = embedder.Type1Font;
isEmbedded = true;
isDamaged = false;
fontMatrixTransform = SKMatrix.Identity;
codeToBytesMap = new Dictionary <int, byte[]>();
}
/**
* This will load a PFB to be embedded into a document.
*
* @param doc The PDF document that will hold the embedded font.
* @param dict The Font dictionary to write to.
* @param pfbStream The pfb input.
* @throws IOException If there is an error loading the data.
*/
public PdfType1FontEmbedder(Document doc, PdfDictionary dict, Bytes.IInputStream pfbStream, Encoding encoding)
{
dict[PdfName.Subtype] = PdfName.Type1;
// read the pfb
byte[] pfbBytes = pfbStream.ToByteArray();
PfbParser pfbParser = new PfbParser(pfbBytes);
type1 = Type1Font.CreateWithPFB(pfbBytes);
if (encoding == null)
{
fontEncoding = Type1Encoding.FromFontBox(type1.Encoding);
}
else
{
fontEncoding = encoding;
}
// build font descriptor
FontDescriptor fd = BuildFontDescriptor(type1);
PdfStream fontStream = new PdfStream(pfbParser.GetInputStream());
fontStream.Header[PdfName.Length] = PdfInteger.Get(pfbParser.Size);
for (int i = 0; i < pfbParser.Lengths.Length; i++)
{
fontStream.Header[new PdfName("Length" + (i + 1))] = PdfInteger.Get(pfbParser.Lengths[i]);
}
fd.FontFile = new FontFile(doc, fontStream);
// set the values
dict[PdfName.FontDescriptor] = fd.BaseObject;
dict[PdfName.BaseFont] = PdfName.Get(type1.Name);
// widths
List <int> widths = new List <int>(256);
for (int code = 0; code <= 255; code++)
{
string name = fontEncoding.GetName(code);
int width = (int)Math.Round(type1.GetWidth(name));
widths.Add(width);
}
dict[PdfName.FirstChar] = PdfInteger.Get(0);
dict[PdfName.LastChar] = PdfInteger.Get(255);
dict[PdfName.Widths] = new PdfArray(widths.Select(p => PdfInteger.Get(p)));
dict[PdfName.Encoding] = encoding.GetPdfObject();
}
public PdfType1Font(Document context, string baseFont) : base(context, baseFont)
{
Dictionary[PdfName.Subtype] = PdfName.Type1;
Dictionary[PdfName.BaseFont] = PdfName.Get(baseFont);
switch (baseFont)
{
case "ZapfDingbats":
encoding = ZapfDingbatsEncoding.Instance;
break;
case "Symbol":
encoding = SymbolEncoding.Instance;
break;
default:
encoding = WinAnsiEncoding.Instance;
Dictionary[PdfName.Encoding] = PdfName.WinAnsiEncoding;
break;
}
// standard 14 fonts may be accessed concurrently, as they are singletons
codeToBytesMap = new Dictionary <int, byte[]>();
// todo: could load the PFB font here if we wanted to support Standard 14 embedding
type1font = null;
FontMapping <BaseFont> mapping = FontMappers.Instance.GetBaseFont(BaseFont, FontDescriptor);
genericFont = mapping.Font;
if (mapping.IsFallback)
{
string fontName;
try
{
fontName = genericFont.Name;
}
catch (IOException e)
{
Debug.WriteLine($"debug: Couldn't get font name - setting to '?' {e}");
fontName = "?";
}
Debug.WriteLine($"warn: Using fallback font {fontName} for base font {BaseFont}");
}
isEmbedded = false;
isDamaged = false;
fontMatrixTransform = SKMatrix.Identity;
}
/**
* Returns a FontDescriptor for the given PFB.
*/
public static FontDescriptor BuildFontDescriptor(Type1Font type1)
{
bool isSymbolic = type1.Encoding is BuiltInEncoding;
FontDescriptor fd = new FontDescriptor();
fd.FontName = type1.Name;
fd.FontFamily = type1.FamilyName;
fd.NonSymbolic = !isSymbolic;
fd.Symbolic = isSymbolic;
fd.FontBBox = new Rectangle(type1.FontBBox);
fd.ItalicAngle = type1.ItalicAngle;
fd.Ascent = type1.FontBBox.Top;
fd.Descent = type1.FontBBox.Bottom;
fd.CapHeight = type1.BlueValues[2];
fd.StemV = 0; // for PDF/A
return(fd);
}
internal static Type1Font LoadType1Font(FontFile fontFile)
{
Type1Font t1 = null;
var stream = fontFile.BaseDataObject;
int length1 = fontFile.Length1;
int length2 = fontFile.Length2;
// repair Length1 and Length2 if necessary
byte[] bytes = stream.ExtractBody(true).GetBuffer();
length1 = RepairLength1(bytes, length1);
length2 = RepairLength2(bytes, length1, length2);
if (bytes.Length > 0 && (bytes[0] & 0xff) == PFB_START_MARKER)
{
// some bad files embed the entire PFB, see PDFBOX-2607
t1 = Type1Font.CreateWithPFB(bytes);
}
else
{
// the PFB embedded as two segments back-to-back
byte[] segment1 = new byte[length1];
Array.Copy(bytes, 0, segment1, 0, length1);
byte[] segment2 = new byte[length2];
Array.Copy(bytes, length1, segment2, 0, length2);
// empty streams are simply ignored
if (length1 > 0 && length2 > 0)
{
t1 = Type1Font.CreateWithSegments(segment1, segment2);
}
}
return(t1);
}