/**
* <summary>Loads the font data.</summary>
*/
private void Load(OpenFontParser parser)
{
glyphIndexes = parser.GlyphIndexes;
glyphKernings = parser.GlyphKernings;
glyphWidths = parser.GlyphWidths;
PdfDictionary baseDataObject = BaseDataObject;
// BaseFont.
baseDataObject[PdfName.BaseFont] = new PdfName(parser.FontName);
// Subtype.
baseDataObject[PdfName.Subtype] = PdfName.Type0;
// Encoding.
baseDataObject[PdfName.Encoding] = PdfName.IdentityH; //TODO: this is a simplification (to refine later).
// Descendant font.
PdfDictionary cidFontDictionary = new PdfDictionary(
new PdfName[] { PdfName.Type },
new PdfDirectObject[] { PdfName.Font }
); // CIDFont dictionary [PDF:1.6:5.6.3].
{
// Subtype.
// FIXME: verify proper Type 0 detection.
cidFontDictionary[PdfName.Subtype] = PdfName.CIDFontType2;
// BaseFont.
cidFontDictionary[PdfName.BaseFont] = new PdfName(parser.FontName);
// CIDSystemInfo.
cidFontDictionary[PdfName.CIDSystemInfo] = new PdfDictionary(
new PdfName[]
{
PdfName.Registry,
PdfName.Ordering,
PdfName.Supplement
},
new PdfDirectObject[]
{
new PdfTextString("Adobe"),
new PdfTextString("Identity"),
PdfInteger.Get(0)
}
); // Generic predefined CMap (Identity-H/V (Adobe-Identity-0)) [PDF:1.6:5.6.4].
// FontDescriptor.
cidFontDictionary[PdfName.FontDescriptor] = Load_CreateFontDescriptor(parser);
// Encoding.
Load_CreateEncoding(baseDataObject, cidFontDictionary);
}
baseDataObject[PdfName.DescendantFonts] = new PdfArray(new PdfDirectObject[] { File.Register(cidFontDictionary) });
Load();
}
/**
* <summary>Creates the representation of a font.</summary>
*/
public static Font Get(Document context, IInputStream fontData)
{
if (OpenFontParser.IsOpenFont(fontData))
{
return(CompositeFont.Get(context, fontData));
}
else
{
throw new NotImplementedException();
}
}
new public static CompositeFont Get(Document context, bytes::IInputStream fontData)
{
OpenFontParser parser = new OpenFontParser(fontData);
switch (parser.OutlineFormat)
{
case OpenFontParser.OutlineFormatEnum.PostScript:
return(new Type0Font(context, parser));
case OpenFontParser.OutlineFormatEnum.TrueType:
return(new Type2Font(context, parser));
}
throw new NotSupportedException("Unknown composite font format.");
}
internal Type2Font(Document context, OpenFontParser parser) : base(context, parser)
{
}
internal CompositeFont(Document context, OpenFontParser parser)
: base(context)
{
Load(parser);
}
/**
* <summary>Creates the font descriptor.</summary>
*/
private PdfReference Load_CreateFontDescriptor(OpenFontParser parser)
{
PdfDictionary fontDescriptor = new PdfDictionary();
{
OpenFontParser.FontMetrics metrics = parser.Metrics;
// Type.
fontDescriptor[PdfName.Type] = PdfName.FontDescriptor;
// FontName.
fontDescriptor[PdfName.FontName] = BaseDataObject[PdfName.BaseFont];
// Flags [PDF:1.6:5.7.1].
FlagsEnum flags = 0;
if (metrics.IsFixedPitch)
{
flags |= FlagsEnum.FixedPitch;
}
if (metrics.IsCustomEncoding)
{
flags |= FlagsEnum.Symbolic;
}
else
{
flags |= FlagsEnum.Nonsymbolic;
}
fontDescriptor[PdfName.Flags] = PdfInteger.Get(Convert.ToInt32(flags));
// FontBBox.
fontDescriptor[PdfName.FontBBox] = new Rectangle(
new SKPoint(metrics.XMin * metrics.UnitNorm, metrics.YMin * metrics.UnitNorm),
new SKPoint(metrics.XMax * metrics.UnitNorm, metrics.YMax * metrics.UnitNorm)
).BaseDataObject;
// ItalicAngle.
fontDescriptor[PdfName.ItalicAngle] = PdfReal.Get(metrics.ItalicAngle);
// Ascent.
fontDescriptor[PdfName.Ascent] = PdfReal.Get(
metrics.STypoAscender == 0
? metrics.Ascender * metrics.UnitNorm
: (metrics.STypoLineGap == 0 ? metrics.SCapHeight : metrics.STypoAscender) * metrics.UnitNorm
);
// Descent.
fontDescriptor[PdfName.Descent] = PdfReal.Get(
metrics.STypoDescender == 0
? metrics.Descender * metrics.UnitNorm
: metrics.STypoDescender * metrics.UnitNorm
);
// CapHeight.
fontDescriptor[PdfName.CapHeight] = PdfReal.Get(metrics.SCapHeight * metrics.UnitNorm);
// StemV.
/*
* NOTE: '100' is just a rule-of-thumb value, 'cause I've still to solve the
* 'cvt' table puzzle (such a harsh headache!) for TrueType fonts...
* TODO:IMPL TrueType and CFF stemv real value to extract!!!
*/
fontDescriptor[PdfName.StemV] = PdfInteger.Get(100);
// FontFile.
fontDescriptor[PdfName.FontFile2] = File.Register(new PdfStream(new bytes::Buffer(parser.FontData.ToByteArray())));
}
return(File.Register(fontDescriptor));
}
