private static void ReplaceImg()
{
PdfReader pdf = new PdfReader(@"E:\pdf\156281489401000002.pdf");
PdfStamper stp = new PdfStamper(pdf, new FileStream(@"E:\pdf\test.pdf", FileMode.Create));
PdfWriter writer = stp.Writer;
Image img = Image.GetInstance(@"E:\pdf\sign.png");
PdfDictionary pg = pdf.GetPageN(1);
PdfDictionary res = (PdfDictionary)PdfReader.GetPdfObject(pg.Get(PdfName.RESOURCES));
PdfDictionary xobj = (PdfDictionary)PdfReader.GetPdfObject(res.Get(PdfName.XOBJECT));
if (xobj != null)
{
foreach (PdfName name in xobj.Keys)
{
PdfObject obj = xobj.Get(name);
if (obj.IsIndirect())
{
PdfDictionary tg = (PdfDictionary)PdfReader.GetPdfObject(obj);
PdfName type = (PdfName)PdfReader.GetPdfObject(tg.Get(PdfName.SUBTYPE));
if (PdfName.IMAGE.Equals(type))
{
PdfReader.KillIndirect(obj);
Image maskImage = img.ImageMask;
if (maskImage != null)
{
writer.AddDirectImageSimple(maskImage);
writer.AddDirectImageSimple(img, (PRIndirectReference)obj);
break;
}
}
}
}
stp.Close();
}
}
private void btnRemoveImage_Click_1(object sender, EventArgs e)
{
var sourceFolder = Path.GetDirectoryName(fileName);
if (!Directory.Exists(sourceFolder + "\\Output"))
{
Directory.CreateDirectory(sourceFolder + "\\Output");
}
Stream white = File.OpenRead("White.png");
iTextSharp.text.Image whiteImg = iTextSharp.text.Image.GetInstance(white);
var outfileName = sourceFolder + "\\Output\\" + Path.GetFileName(fileName);
var outputStream = new FileStream(outfileName, FileMode.Create);
_pdfStamper = new PdfStamper(_reader, outputStream);
PdfWriter writer = _pdfStamper.Writer;
//var obj1 = tvDOM.SelectedNode.Tag as PdfObject;
try
{
PdfDictionary pg = _reader.GetPageN(1);
PdfDictionary res =
(PdfDictionary)PdfReader.GetPdfObject(pg.Get(PdfName.RESOURCES));
PdfDictionary xobj =
(PdfDictionary)PdfReader.GetPdfObject(res.Get(PdfName.XOBJECT));
if (xobj != null)
{
foreach (PdfName name in xobj.Keys)
{
PdfObject obj = xobj.Get(name);
if (obj.IsIndirect())
{
PdfDictionary tg = (PdfDictionary)PdfReader.GetPdfObject(obj);
PdfName type =
(PdfName)PdfReader.GetPdfObject(tg.Get(PdfName.SUBTYPE));
if (PdfName.IMAGE.Equals(type))
{
//PdfReader.KillIndirect(obj);
writer.AddDirectImageSimple(whiteImg, (PRIndirectReference)obj);
//break;
}
}
}
}
_reader.RemoveUnusedObjects();
_pdfStamper.Close();
if (dffOpenOutputInAdobe.Checked)
{
Process.Start(outfileName);
}
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
Console.ReadLine();
}
}
/// <summary>
/// Procesa un PDF
/// </summary>
private static MemoryStream PDFCompress2(Stream fileStream)
{
BinaryReader br = new BinaryReader(fileStream);
byte[] byt = br.ReadBytes((int)fileStream.Length);
MemoryStream ms = new MemoryStream();
PdfReader pdf = new PdfReader(byt);
if (pdf.IsOpenedWithFullPermissions)
{
PdfStamper stp = new PdfStamper(pdf, ms);
PdfWriter writer = stp.Writer;
//
int page_count = pdf.NumberOfPages;
for (int i = 1; i <= page_count; i++)
{
PdfDictionary pg = pdf.GetPageN(i);
PdfDictionary res = (PdfDictionary)PdfReader.GetPdfObject(pg.Get(PdfName.RESOURCES));
PdfDictionary xobj = (PdfDictionary)PdfReader.GetPdfObject(res.Get(PdfName.XOBJECT));
if (xobj != null)
{
foreach (PdfName name in xobj.Keys)
{
PdfObject obj = xobj.Get(name);
if (obj.IsIndirect())
{
PdfDictionary tg = (PdfDictionary)PdfReader.GetPdfObject(obj);
if (tg != null)//Veo que a veces que si se trata varias veces la misma imagen esto se vuelve null
{
PdfName type = (PdfName)PdfReader.GetPdfObject(tg.Get(PdfName.SUBTYPE));
if (PdfName.IMAGE.Equals(type))
{
int xrefIdx = ((PRIndirectReference)obj).Number;
PdfObject pdfObj = pdf.GetPdfObject(xrefIdx);
PdfStream str = (PdfStream)pdfObj;
string filter = string.Empty;
if (tg.Get(PdfName.FILTER) != null)
{
filter = tg.Get(PdfName.FILTER).ToString();
}
else
{
}
if (filter.Contains("/DCTDecode")) //Unas veces es "[/DCTDecode]" y otras "/DCTDecode"
{
try
{
iTextSharp.text.Image img = iTextSharp.text.Image.GetInstance((PRIndirectReference)obj);
//byte[] bytes = PdfReader.GetStreamBytesRaw((PRStream)str);
//System.Drawing.Image imgOriginal = System.Drawing.Image.FromStream(new MemoryStream(bytes));
PdfImageObject pdfImage = new PdfImageObject((PRStream)str);
using (System.Drawing.Image imgOriginal = pdfImage.GetDrawingImage())
using (System.Drawing.Image img2 = Globals.ResizeImage(imgOriginal))
{
if (img2.Width != imgOriginal.Width || img2.Height != imgOriginal.Height)
{
//img2 = Resize(img2, maxImageWidth, maxImageHeight);
var stream = new System.IO.MemoryStream();
img2.Save(stream, ImageFormat.Jpeg);
stream.Position = 0;
PdfReader.KillIndirect(obj);
img = iTextSharp.text.Image.GetInstance(stream);
writer.AddDirectImageSimple(img, (PRIndirectReference)obj);
}
}
}
catch (Exception ex)
{
throw ex;
}
break;
}
}
}
}
}
}
}
stp.Writer.CloseStream = false;
stp.FormFlattening = true;
stp.Close();
pdf.Close();
//return ms;
}
else
{
ms = null;
}
return(ms);
}