public PdfDocumentWriter(Stream stream, PdfDocumentOptions options = null)
{
// Initialize collections and object references:
this.Xref = new List<long>();
this.Fonts = new Dictionary<string, PdfObjectRef>();
this.XObjects = new Dictionary<string, PdfObjectRef>();
this.XObjectsRev = new Dictionary<PdfObjectRef, string>();
this.ImageRatios = new Dictionary<PdfObjectRef, double>();
this.CatalogRef = NewObjectRef();
this.PagesRef = NewObjectRef();
this.ResourcesRef = NewObjectRef();
this.InfoRef = NewObjectRef();
// Wrap the given stream in a Position-logging stream and build a StreamWriter:
this.InnerWriter = new StreamWriter(new PositionStream(stream), Encoding.ASCII);
// Make sure options are set:
this.Options = options ?? new PdfDocumentOptions();
// Write document introduction:
this.WriteIntro();
}
/// <summary>
/// Draws an image (convenience method).
/// Assumes default naming of object references is used.
/// </summary>
public void DrawImageByRef2(double x1, double y1, double x2, double y2, PdfObjectRef imageRef)
{
this.DrawImageByName2(x1, y1, x2, y2, imageRef.ToDefaultName());
}
/// <summary>
/// Draws an image (convenience method).
/// Assumes default naming of object references is used.
/// </summary>
public void DrawImageByRef(double x, double y, double width, double height, PdfObjectRef imageRef)
{
this.DrawImageByName(x, y, width, height, imageRef.ToDefaultName());
}
/// <summary>
/// Adds the object referenced by the given object reference to this page.
/// </summary>
public virtual void WriteObjectRef(PdfObjectRef objRef)
{
Content.Add(objRef);
}
/// <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>
/// Returns the height the previoulsy added image should have, when rendered with the given width, in order to have
/// the same aspect ration.
/// </summary>
/// <param name="imageRef">Reference to the image previoulsy added.</param>
/// <param name="forWidth">Width to render the image with.</param>
public double GetImageHeight(PdfObjectRef imageRef, double forWidth)
{
return this.ImageRatios[imageRef] * forWidth;
}
public double GetImageAspectRatio(PdfObjectRef imageRef)
{
return this.ImageRatios[imageRef];
}
/// <summary>
/// Retrieves the name of a previously added XObject.
/// </summary>
public string GetNameOfXObject(PdfObjectRef objRef)
{
return this.XObjectsRev[objRef];
}
protected void RegisterXObject(PdfObjectRef objRef, string name)
{
XObjects[name] = objRef;
XObjectsRev[objRef] = name;
}
