/// <summary>
/// Writes the given object to the page (writes it on the document and adds it on this page).
/// Returns an object reference to the object.
/// </summary>
public virtual PdfObjectRef WriteObject(PdfObject obj)
{
if (obj is PdfScriptObject)
{
foreach (var font in ((PdfScriptObject)obj).ReferencedFonts)
DocumentWriter.RegisterFont(font);
}
var objRef = DocumentWriter.WriteObject(obj);
this.WriteObjectRef(objRef);
return objRef;
}
/// <summary>
/// Closes this PageWriter, writing as PageObject to the document.
/// </summary>
public virtual void Close()
{
if(DocumentWriter != null)
{
// Create and write the PageObject:
var pageObj = new PdfObject();
pageObj.Data["Type"] = "/Page";
pageObj.Data["MediaBox"] = String.Format("[0 0 {0:0.###} {1:0.###}]", this.Width, this.Height);
if (this.Content.Count > 0)
pageObj.Data["Contents"] = "[" + String.Join(" ", this.Content.Select(c => c.ToString())) + "]";
DocumentWriter.WritePage(pageObj);
// Page is now closed:
DocumentWriter = null;
}
}
/// <summary>
/// Writes a PdfPageObject and links it to the pages tree.
/// For internal use.
/// </summary>
public void WritePage(PdfObject pageObj)
{
pageObj.Data["Type"] = "/Page";
pageObj.Data["Parent"] = PagesRef;
pageObj.Data["Resources"] = ResourcesRef;
var pageObjRef = this.WriteObject(pageObj);
PageRefs.Add(pageObjRef);
}
protected virtual void WriteTrailer()
{
var resources = new PdfObject();
if (this.Fonts.Count > 0)
resources.Data["Font"] = "<< " + String.Join(" ", this.Fonts.Select(kv => kv.Key + " " + kv.Value)) + " >>";
if (this.XObjects.Count > 0)
resources.Data["XObject"] = "<< " + String.Join(" ", this.XObjects.Select(kv => kv.Key + " " + kv.Value)) + " >>";
this.WriteObject(resources, ResourcesRef);
var pages = new PdfObject();
pages.Data["Type"] = "/Pages";
pages.Data["Count"] = PageRefs.Count;
pages.Data["Kids"] = "[" + String.Join(" ", PageRefs.Select(r => r.ToString())) + "]";
WriteObject(pages, PagesRef);
var xrefStart = this.Position;
var builder = new StringBuilder();
builder.Append("xref\r\n");
builder.Append("0 ");
builder.Append(Xref.Count + 1);
builder.Append("\r\n");
builder.Append("0000000000 65535 f\r\n");
foreach (var offset in Xref)
{
if (offset < 0)
{
builder.AppendFormat("{0:0000000000} {1:00000} {2}\r\n", 0L, CurrentGenerationId, 'f');
}
else
{
builder.AppendFormat("{0:0000000000} {1:00000} {2}\r\n", offset, CurrentGenerationId, 'n');
}
}
var fileId = Guid.NewGuid().ToString().Replace("-", "");
builder.Append("trailer\n<<\n/Size ");
builder.Append(Xref.Count + 1);
builder.Append("\n/Root ");
builder.Append(CatalogRef);
builder.Append("\n/Info ");
builder.Append(InfoRef);
builder.Append("\n/ID [<");
builder.Append(fileId);
builder.Append("><");
builder.Append(fileId);
builder.Append(">]");
builder.Append("\n>>\nstartxref\n");
builder.Append(xrefStart);
builder.Append("\n%%EOF\n");
this.WriteRaw(builder.ToString());
}
/// <summary>
/// Writes a PdfObject to this document given its object reference.
/// </summary>
public virtual void WriteObject(PdfObject obj, PdfObjectRef objRef)
{
if (obj is PdfScriptObject)
{
foreach (var font in ((PdfScriptObject)obj).ReferencedFonts)
RegisterFont(font);
}
Xref[objRef.ObjectId-1] = this.Position;
var builder = new StringBuilder();
builder.Append(objRef.ObjectId + " " + objRef.GenerationId + " obj\n");
if (obj.Data != null || obj.Stream != null)
{
builder.Append("<<\n");
if (obj.Data != null)
{
foreach (var pair in obj.Data)
{
builder.Append('/');
builder.Append(pair.Key);
builder.Append(' ');
builder.Append(pair.Value.ToString());
builder.Append('\n');
}
}
if (obj.Stream == null)
{
builder.Append(">>\n");
}
else if (obj.Stream is PdfBinaryStream)
{
var s = ((PdfBinaryStream)obj.Stream);
builder.Append("/Length ");
builder.Append(s.Length);
builder.Append("\n/Filter [");
builder.Append(s.Filter);
builder.Append("]\n>>\n");
builder.Append("stream\n");
this.WriteRaw(builder.ToString());
builder.Length = 0;
this.WriteRaw(s.Content, 0, s.Content.Length);
builder.Append("\nendstream\n");
}
else
{
byte[] bytes;
if ((obj.Stream is PdfTextStream) && (this.Options.TextFilter != null))
{
bytes = this.Options.TextFilter.EncodeString(((PdfTextStream)obj.Stream).Content.ToString());
builder.Append("/Filter [");
builder.Append(this.Options.TextFilter.Name);
builder.Append("]\n");
}
else
{
bytes = Encoding.Default.GetBytes(((PdfTextStream)obj.Stream).Content.ToString());
}
builder.Append("/Length ");
builder.Append(bytes.Length);
builder.Append('\n');
builder.Append(">>\n");
builder.Append("stream\n");
this.WriteRaw(builder.ToString());
builder.Length = 0;
this.WriteRaw(bytes, 0, bytes.Length);
builder.Append("\nendstream\n");
}
}
builder.Append("endobj\n");
this.WriteRaw(builder.ToString());
}
/// <summary>
/// Writes a PdfObject to this document and returns the reference to that object.
/// Note that this does not add the object to a page.
/// </summary>
public PdfObjectRef WriteObject(PdfObject obj)
{
var objRef = NewObjectRef();
this.WriteObject(obj, objRef);
return objRef;
}
/// <summary>
/// Adds an 'XObject' to the stream and returns a reference object to it.
/// </summary>
public PdfObjectRef AddXObject(PdfObject obj)
{
var objRef = this.NewObjectRef();
var name = (obj.Data.ContainsKey("Name")) ? obj.Data["Name"].ToString() : objRef.ToDefaultName();
if (obj.Data.ContainsKey("Type") && !"/XObject".Equals(obj.Data["Type"])) throw new ArgumentException("PdfObject is not a valid XObject, it's Type must be '/XObject'.");
obj.Data["Type"] = "/XObject";
if (!obj.Data.ContainsKey("Subtype")) obj.Data["Subtype"] = "/Form";
obj.Data["Name"] = name;
this.WriteObject(obj, objRef);
RegisterXObject(objRef, name);
return objRef;
}
/// <summary>
/// Adds an image to the PDF document and returns a reference object to it.
/// </summary>
public PdfObjectRef AddImage(Image image)
{
var obj = new PdfObject();
obj.Data["Subtype"] = "/Image";
obj.Data["Width"] = image.Width;
obj.Data["Height"] = image.Height;
obj.Data["BitsPerComponent"] = "8";
obj.Data["ColorSpace"] = "/DeviceRGB";
using (var ms = new MemoryStream())
{
image.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);
obj.Stream = new PdfBinaryStream("/DCTDecode", ms.ToArray());
}
var objRef = AddXObject(obj);
ImageRatios[objRef] = (double)image.Height / image.Width;
return objRef;
}
protected virtual void WriteIntro()
{
var binarybytes = new byte[] { 0xE2, 0xE3, 0xCF, 0xD3 };
WriteRaw("%PDF-" + PdfVersion + "\n%");
WriteRaw(binarybytes, 0, binarybytes.Length);
WriteRaw("\n%Arebis.Pdf .NET Library\n");
var catalog = new PdfObject();
catalog.Data["Type"] = "/Catalog";
catalog.Data["Version"] = "/" + PdfVersion;
catalog.Data["Pages"] = PagesRef;
WriteObject(catalog, CatalogRef);
var info = new PdfObject();
if (!String.IsNullOrWhiteSpace(this.Options.Title)) info.Data["Title"] = '(' + this.Options.Title + ')';
if (!String.IsNullOrWhiteSpace(this.Options.Subject)) info.Data["Subject"] = '(' + this.Options.Subject + ')';
if (!String.IsNullOrWhiteSpace(this.Options.Keywords)) info.Data["Keywords"] = '(' + this.Options.Keywords + ')';
info.Data["Author"] = '(' + ((!String.IsNullOrWhiteSpace(this.Options.Author)) ? this.Options.Author : Environment.UserName) + ')';
info.Data["Creator"] = "(" + PdfCreator + ")";
var now = DateTime.Now;
var timezone = TimeZone.CurrentTimeZone.GetUtcOffset(now);
info.Data["CreationDate"] = "(D:" + now.ToString("yyyyMMddHHmmss", CultureInfo.InvariantCulture) + (timezone.Ticks >= 0 ? '+' : '-') + String.Format("{0:00}'{1:00}'", Math.Abs(timezone.Hours), Math.Abs(timezone.Minutes)) + ")";
WriteObject(info, InfoRef);
}
