How to NOT flatten the image applied in a pdf with Itext in c#? - itext

Question

I need to apply an image on all my pages from my PDF, but without flattening it ( I want to have the ability to move it in my PDF reader afterwards)
My code:
String basePath = "d:\\zPDF\\";
DirectoryInfo d = new DirectoryInfo(basePath);//Assuming Test is your Folder
FileInfo[] Files = d.GetFiles("*.pdf"); //Getting Text files
List<string> listS = new List<string>();
foreach (FileInfo file in Files)
{
listS.Add(file.Name);
}
foreach (string s in listS)
{
using (System.IO.Stream inputPdfStream = new FileStream(basePath + s, FileMode.Open, System.IO.FileAccess.Read, FileShare.ReadWrite))
//using (System.IO.Stream inputImageStream = new FileStream(basePath + "x1.wmf", FileMode.Open, System.IO.FileAccess.Read, FileShare.Read))
using (System.IO.Stream inputImageStream2 = new FileStream(basePath + "x2.wmf", FileMode.Open, System.IO.FileAccess.Read, FileShare.Read))
using (System.IO.Stream outputPdfStream = new FileStream(basePath + "zResult" + s, FileMode.Create, System.IO.FileAccess.Write, FileShare.None))
{
var reader = new PdfReader(inputPdfStream);
var stamper = new PdfStamper(reader, outputPdfStream);
//stamper.FormFlattening = true;
//stamper.FreeTextFlattening = true;
int numberOfPages = reader.NumberOfPages;
Image myImage = Image.GetInstance(inputImageStream2);
float f-Image1, f-Image2;
for (int i = 1; i <= numberOfPages; i++)
{
int nr, plusMinus = 25;
Rectangle mediabox = reader.GetPageSize(i);
int getTOP = (int)mediabox.GetTop(0);
int getRight = (int)mediabox.GetRight(0);
var pdfContentByte = stamper.GetOverContent(i);
nr = getRight - 600;
f-Image1 = row1(nr, nr + plusMinus);
//row1 - generates a random number between those 2 values
nr = 40;
f-Image2 = row1(nr, nr + plusMinus);
//row1 - generates a random number between those 2 values
myImage.SetAbsolutePosition(f-Image1, f-Image2);
myImage.RotationDegrees = row1(-35, 35);
pdfContentByte.AddImage(myImage);
}
stamper.Close();
}
I've tried:
stamper.FormFlattening = false;
stamper.FreeTextFlattening = false;
but no results. The image is still flatten.
I think, after I've read some posts, that I need to set up my PdfStamper in useAppendMode() but I don't know how should I do this and, I don't know if this is this right direction.