public byte[] Build()
{
var context = new BuilderContext();
var fontsWritten = new Dictionary <Guid, ObjectToken>();
using (var memory = new MemoryStream())
{
// Header
WriteString("%PDF-1.7", memory);
// Body
foreach (var font in fonts)
{
var fontObj = font.Value.FontProgram.WriteFont(font.Value.FontKey.Name, memory, context);
fontsWritten.Add(font.Key, fontObj);
}
var resources = new Dictionary <NameToken, IToken>
{
{ NameToken.ProcSet, new ArrayToken(new [] { NameToken.Create("PDF"), NameToken.Create("Text") }) }
};
if (fontsWritten.Count > 0)
{
var fontsDictionary = new DictionaryToken(fontsWritten.Select(x => (fonts[x.Key].FontKey.Name, (IToken) new IndirectReferenceToken(x.Value.Number)))
.ToDictionary(x => x.Item1, x => x.Item2));
var fontsDictionaryRef = context.WriteObject(memory, fontsDictionary);
resources.Add(NameToken.Font, new IndirectReferenceToken(fontsDictionaryRef.Number));
}
var pageReferences = new List <IndirectReferenceToken>();
foreach (var page in pages)
{
var pageDictionary = new Dictionary <NameToken, IToken>
{
{ NameToken.Type, NameToken.Page },
{
NameToken.Resources,
new DictionaryToken(resources)
},
{ NameToken.MediaBox, RectangleToArray(page.Value.PageSize) }
};
if (page.Value.Operations.Count > 0)
{
var contentStream = WriteContentStream(page.Value.Operations);
var contentStreamObj = context.WriteObject(memory, contentStream);
pageDictionary[NameToken.Contents] = new IndirectReferenceToken(contentStreamObj.Number);
}
var pageRef = context.WriteObject(memory, new DictionaryToken(pageDictionary));
pageReferences.Add(new IndirectReferenceToken(pageRef.Number));
}
var pagesDictionary = new DictionaryToken(new Dictionary <NameToken, IToken>
{
{ NameToken.Type, NameToken.Pages },
{ NameToken.Kids, new ArrayToken(pageReferences) },
{ NameToken.Count, new NumericToken(1) }
});
var pagesRef = context.WriteObject(memory, pagesDictionary);
var catalog = new DictionaryToken(new Dictionary <NameToken, IToken>
{
{ NameToken.Type, NameToken.Catalog },
{ NameToken.Pages, new IndirectReferenceToken(pagesRef.Number) }
});
var catalogRef = context.WriteObject(memory, catalog);
TokenWriter.WriteCrossReferenceTable(context.ObjectOffsets, catalogRef, memory);
return(memory.ToArray());
}
}
/// <summary>
/// Builds a PDF document from the current content of this builder and its pages.
/// </summary>
/// <returns>The bytes of the resulting PDF document.</returns>
public byte[] Build()
{
var context = new BuilderContext();
var fontsWritten = new Dictionary <Guid, ObjectToken>();
using (var memory = new MemoryStream())
{
// Header
WriteString("%PDF-1.7", memory);
// Files with binary data should contain a 2nd comment line followed by 4 bytes with values > 127
memory.WriteText("%");
memory.WriteByte(169);
memory.WriteByte(205);
memory.WriteByte(196);
memory.WriteByte(210);
memory.WriteNewLine();
// Body
foreach (var font in fonts)
{
var fontObj = font.Value.FontProgram.WriteFont(font.Value.FontKey.Name, memory, context);
fontsWritten.Add(font.Key, fontObj);
}
var resources = new Dictionary <NameToken, IToken>
{
{ NameToken.ProcSet, new ArrayToken(new [] { NameToken.Create("PDF"), NameToken.Create("Text") }) }
};
if (fontsWritten.Count > 0)
{
var fontsDictionary = new DictionaryToken(fontsWritten.Select(x => (fonts[x.Key].FontKey.Name, (IToken) new IndirectReferenceToken(x.Value.Number)))
.ToDictionary(x => x.Item1, x => x.Item2));
var fontsDictionaryRef = context.WriteObject(memory, fontsDictionary);
resources.Add(NameToken.Font, new IndirectReferenceToken(fontsDictionaryRef.Number));
}
var reserved = context.ReserveNumber();
var parentIndirect = new IndirectReferenceToken(new IndirectReference(reserved, 0));
var pageReferences = new List <IndirectReferenceToken>();
foreach (var page in pages)
{
var pageDictionary = new Dictionary <NameToken, IToken>
{
{ NameToken.Type, NameToken.Page },
{
NameToken.Resources,
new DictionaryToken(resources)
},
{ NameToken.MediaBox, RectangleToArray(page.Value.PageSize) },
{ NameToken.Parent, parentIndirect }
};
if (page.Value.Operations.Count > 0)
{
var contentStream = WriteContentStream(page.Value.Operations);
var contentStreamObj = context.WriteObject(memory, contentStream);
pageDictionary[NameToken.Contents] = new IndirectReferenceToken(contentStreamObj.Number);
}
var pageRef = context.WriteObject(memory, new DictionaryToken(pageDictionary));
pageReferences.Add(new IndirectReferenceToken(pageRef.Number));
}
var pagesDictionary = new DictionaryToken(new Dictionary <NameToken, IToken>
{
{ NameToken.Type, NameToken.Pages },
{ NameToken.Kids, new ArrayToken(pageReferences) },
{ NameToken.Count, new NumericToken(pageReferences.Count) }
});
var pagesRef = context.WriteObject(memory, pagesDictionary, reserved);
var catalog = new DictionaryToken(new Dictionary <NameToken, IToken>
{
{ NameToken.Type, NameToken.Catalog },
{ NameToken.Pages, new IndirectReferenceToken(pagesRef.Number) }
});
var catalogRef = context.WriteObject(memory, catalog);
var informationReference = default(IndirectReference?);
if (IncludeDocumentInformation)
{
var informationDictionary = DocumentInformation.ToDictionary();
if (informationDictionary.Count > 0)
{
var dictionary = new DictionaryToken(informationDictionary);
informationReference = context.WriteObject(memory, dictionary).Number;
}
}
TokenWriter.WriteCrossReferenceTable(context.ObjectOffsets, catalogRef, memory, informationReference);
return(memory.ToArray());
}
}
public ObjectToken WriteFont(NameToken fontKeyName, Stream outputStream, BuilderContext context)
{
var bytes = fontFileBytes;
var embeddedFile = new StreamToken(new DictionaryToken(new Dictionary <NameToken, IToken>
{
{ NameToken.Length, new NumericToken(bytes.Count) }
}), bytes);
var fileRef = context.WriteObject(outputStream, embeddedFile);
var baseFont = NameToken.Create(font.TableRegister.NameTable.GetPostscriptName());
var charCodeToGlyphId = new CharacterCodeToGlyphIdMapper(font);
var postscript = font.TableRegister.PostScriptTable;
var hhead = font.TableRegister.HorizontalHeaderTable;
var bbox = font.TableRegister.HeaderTable.Bounds;
var scaling = 1000m / font.TableRegister.HeaderTable.UnitsPerEm;
var descriptorDictionary = new Dictionary <NameToken, IToken>
{
{ NameToken.Type, NameToken.FontDescriptor },
{ NameToken.FontName, baseFont },
// TODO: get flags TrueTypeEmbedder.java
{ NameToken.Flags, new NumericToken((int)FontFlags.Symbolic) },
{ NameToken.FontBbox, GetBoundingBox(bbox, scaling) },
{ NameToken.ItalicAngle, new NumericToken(postscript.ItalicAngle) },
{ NameToken.Ascent, new NumericToken(hhead.Ascender * scaling) },
{ NameToken.Descent, new NumericToken(hhead.Descender * scaling) },
{ NameToken.CapHeight, new NumericToken(90) },
{ NameToken.StemV, new NumericToken(90) },
{ NameToken.FontFile2, new IndirectReferenceToken(fileRef.Number) }
};
var os2 = font.TableRegister.Os2Table;
if (os2 == null)
{
throw new InvalidFontFormatException("Embedding TrueType font requires OS/2 table.");
}
if (os2 is Os2Version2To4OpenTypeTable twoPlus)
{
descriptorDictionary[NameToken.CapHeight] = new NumericToken(twoPlus.CapHeight);
descriptorDictionary[NameToken.Xheight] = new NumericToken(twoPlus.XHeight);
}
descriptorDictionary[NameToken.StemV] = new NumericToken(bbox.Width * scaling * 0.13m);
var metrics = charCodeToGlyphId.GetMetrics();
var widthsRef = context.WriteObject(outputStream, metrics.Widths);
var descriptor = context.WriteObject(outputStream, new DictionaryToken(descriptorDictionary));
var dictionary = new Dictionary <NameToken, IToken>
{
{ NameToken.Type, NameToken.Font },
{ NameToken.Subtype, NameToken.TrueType },
{ NameToken.BaseFont, baseFont },
{ NameToken.FontDescriptor, new IndirectReferenceToken(descriptor.Number) },
{ NameToken.FirstChar, metrics.FirstChar },
{ NameToken.LastChar, metrics.LastChar },
{ NameToken.Widths, new IndirectReferenceToken(widthsRef.Number) },
{ NameToken.Encoding, NameToken.MacRomanEncoding }
};
var token = new DictionaryToken(dictionary);
var result = context.WriteObject(outputStream, token);
return(result);
}