private TrueTypeFont FindFontOrSubstitute()
{
TrueTypeFont ttfFont;
CIDFontMapping mapping = FontMappers.Instance.GetCIDFont(BaseFont, FontDescriptor, CIDSystemInfo);
if (mapping.IsCIDFont)
{
ttfFont = mapping.Font;
}
else
{
ttfFont = (TrueTypeFont)mapping.TrueTypeFont;
}
if (mapping.IsFallback)
{
Debug.WriteLine($"warning: Using fallback font {ttfFont.Name} for CID-keyed TrueType font {BaseFont}");
}
return(ttfFont);
}
/**
* Constructor.
*
* @param fontDictionary The font dictionary according to the PDF specification.
* @param parent The parent font.
*/
public CIDFontType0(PdfDirectObject fontDictionary, PdfType0Font parent)
: base(fontDictionary, parent)
{
FontDescriptor fd = FontDescriptor;
FontFile fontFile = null;
byte[] bytes = null;
if (fd != null)
{
fontFile = fd.FontFile3 ?? fd.FontFile;
if (fontFile != null)
{
bytes = fontFile.BaseDataObject.ExtractBody(true).GetBuffer();
}
}
bool fontIsDamaged = false;
CFFFont cffFont = null;
if (bytes != null && bytes.Length > 0 && (bytes[0] & 0xff) == '%')
{
// PDFBOX-2642 contains a corrupt PFB font instead of a CFF
Debug.WriteLine("warn: Found PFB but expected embedded CFF font " + fd.FontName);
try
{
t1Font = PdfType1Font.LoadType1Font(fontFile);
}
catch (DamagedFontException e)
{
Debug.WriteLine($"warn: Can't read damaged embedded Type1 font {fd.FontName} {e}");
fontIsDamaged = true;
}
catch (IOException e)
{
Debug.WriteLine($"error: Can't read the embedded Type1 font {fd.FontName} {e}");
fontIsDamaged = true;
}
}
else if (bytes != null)
{
CFFParser cffParser = new CFFParser();
try
{
cffFont = cffParser.Parse(bytes, new FF3ByteSource(fd, bytes))[0];
}
catch (IOException e)
{
Debug.WriteLine("error: Can't read the embedded CFF font " + fd.FontName, e);
fontIsDamaged = true;
}
}
if (cffFont != null)
{
// embedded
if (cffFont is CFFCIDFont)
{
cidFont = (CFFCIDFont)cffFont;
t1Font = null;
}
else
{
cidFont = null;
t1Font = cffFont;
}
cid2gid = ReadCIDToGIDMap();
isEmbedded = true;
isDamaged = false;
}
else if (t1Font != null)
{
if (t1Font is Type1Font type1Font)
{
cidFont = null;
}
cid2gid = ReadCIDToGIDMap();
isEmbedded = true;
isDamaged = false;
}
else
{
// find font or substitute
CIDFontMapping mapping = FontMappers.Instance.GetCIDFont(BaseFont, FontDescriptor, CIDSystemInfo);
BaseFont font;
if (mapping.IsCIDFont)
{
cffFont = mapping.Font.CFF.Font;
if (cffFont is CFFCIDFont)
{
cidFont = (CFFCIDFont)cffFont;
t1Font = null;
font = cidFont;
}
else
{
// PDFBOX-3515: OpenType fonts are loaded as CFFType1Font
CFFType1Font f = (CFFType1Font)cffFont;
cidFont = null;
t1Font = f;
font = f;
}
}
else
{
cidFont = null;
t1Font = mapping.TrueTypeFont;
font = t1Font;
}
if (mapping.IsFallback)
{
Debug.WriteLine($"warning: Using fallback {font.Name} for CID-keyed font {BaseFont}");
}
isEmbedded = false;
isDamaged = fontIsDamaged;
}
fontMatrixTransform = FontMatrix;
fontMatrixTransform = fontMatrixTransform.PostConcat(SKMatrix.CreateScale(1000, 1000));
}