public PdfStream GetAsStream(PdfName key)
{
PdfStream stream = null;
PdfObject orig = GetDirectObject(key);
if (orig != null && orig.IsStream())
{
stream = (PdfStream)orig;
}
return(stream);
}
public PdfStream GetAsStream(int idx)
{
PdfStream stream = null;
PdfObject orig = GetDirectObject(idx);
if (orig != null && orig.IsStream())
{
stream = (PdfStream)orig;
}
return(stream);
}
/**
* Gets the content stream of a page as a PdfStream object.
* @param pageNumber the page of which you want the stream
* @param compressionLevel the compression level you want to apply to the stream
* @return a PdfStream object
* @since 2.1.3 (the method already existed without param compressionLevel)
*/
internal PdfStream GetFormXObject(int pageNumber, int compressionLevel)
{
PdfDictionary page = reader.GetPageNRelease(pageNumber);
PdfObject contents = PdfReader.GetPdfObjectRelease(page.Get(PdfName.CONTENTS));
PdfDictionary dic = new PdfDictionary();
byte[] bout = null;
if (contents != null)
{
if (contents.IsStream())
{
dic.Merge((PRStream)contents);
}
else
{
bout = reader.GetPageContent(pageNumber, file);
}
}
else
{
bout = new byte[0];
}
dic.Put(PdfName.RESOURCES, PdfReader.GetPdfObjectRelease(page.Get(PdfName.RESOURCES)));
dic.Put(PdfName.TYPE, PdfName.XOBJECT);
dic.Put(PdfName.SUBTYPE, PdfName.FORM);
PdfImportedPage impPage = (PdfImportedPage)importedPages[pageNumber];
dic.Put(PdfName.BBOX, new PdfRectangle(impPage.BoundingBox));
PdfArray matrix = impPage.Matrix;
if (matrix == null)
{
dic.Put(PdfName.MATRIX, IDENTITYMATRIX);
}
else
{
dic.Put(PdfName.MATRIX, matrix);
}
dic.Put(PdfName.FORMTYPE, ONE);
PRStream stream;
if (bout == null)
{
stream = new PRStream((PRStream)contents, dic);
}
else
{
stream = new PRStream(reader, bout);
stream.Merge(dic);
}
return(stream);
}
private void SerObject(PdfObject obj, int level, ByteBuffer bb)
{
if (level <= 0)
{
return;
}
if (obj == null)
{
bb.Append("$Lnull");
return;
}
obj = PdfReader.GetPdfObject(obj);
if (obj.IsStream())
{
bb.Append("$B");
SerDic((PdfDictionary)obj, level - 1, bb);
if (level > 0)
{
md5.Initialize();
bb.Append(md5.ComputeHash(PdfReader.GetStreamBytesRaw((PRStream)obj)));
}
}
else if (obj.IsDictionary())
{
SerDic((PdfDictionary)obj, level - 1, bb);
}
else if (obj.IsArray())
{
SerArray((PdfArray)obj, level - 1, bb);
}
else if (obj.IsString())
{
bb.Append("$S").Append(obj.ToString());
}
else if (obj.IsName())
{
bb.Append("$N").Append(obj.ToString());
}
else
{
bb.Append("$L").Append(obj.ToString());
}
}
public void AlterContents()
{
if (over == null && under == null)
{
return;
}
PdfArray ar = null;
PdfObject content = PdfReader.GetPdfObject(pageN.Get(PdfName.CONTENTS), pageN);
if (content == null)
{
ar = new PdfArray();
pageN.Put(PdfName.CONTENTS, ar);
}
else if (content.IsArray())
{
ar = (PdfArray)content;
}
else if (content.IsStream())
{
ar = new PdfArray();
ar.Add(pageN.Get(PdfName.CONTENTS));
pageN.Put(PdfName.CONTENTS, ar);
}
else
{
ar = new PdfArray();
pageN.Put(PdfName.CONTENTS, ar);
}
ByteBuffer out_p = new ByteBuffer();
if (under != null)
{
out_p.Append(PdfContents.SAVESTATE);
ApplyRotation(pageN, out_p);
out_p.Append(under.InternalBuffer);
out_p.Append(PdfContents.RESTORESTATE);
}
if (over != null)
{
out_p.Append(PdfContents.SAVESTATE);
}
PdfStream stream = new PdfStream(out_p.ToByteArray());
stream.FlateCompress(cstp.CompressionLevel);
PdfIndirectReference ref1 = cstp.AddToBody(stream).IndirectReference;
ar.AddFirst(ref1);
out_p.Reset();
if (over != null)
{
out_p.Append(' ');
out_p.Append(PdfContents.RESTORESTATE);
out_p.Append(PdfContents.SAVESTATE);
ApplyRotation(pageN, out_p);
out_p.Append(over.InternalBuffer);
out_p.Append(PdfContents.RESTORESTATE);
stream = new PdfStream(out_p.ToByteArray());
stream.FlateCompress(cstp.CompressionLevel);
ar.Add(cstp.AddToBody(stream).IndirectReference);
}
pageN.Put(PdfName.RESOURCES, pageResources.Resources);
}