private static Annot setStamperImage(StamperImage stp)
{
var page = _currentDoc.GetPage(stp.Page());
using (pdftron.PDF.Stamper s = new pdftron.PDF.Stamper(pdftron.PDF.Stamper.SizeType.e_relative_scale, .5, .5))
{
s.SetAsAnnotation(true);
var rect = AnnotationsMannager.ConvertRect(stp.RectArea());
_currentDoc.InitSecurityHandler();
//pdftron.PDF.Image img = pdftron.PDF.Image.Create(_currentDoc, String.IsNullOrEmpty(stp.ImagePath()) ? "SuccessStamp.jpg" : stp.ImagePath());
pdftron.PDF.Image img = pdftron.PDF.Image.Create(_currentDoc, System.Convert.FromBase64String(stp.Image()));
s.SetTextAlignment(pdftron.PDF.Stamper.TextAlignment.e_align_center);
s.SetAlignment(pdftron.PDF.Stamper.HorizontalAlignment.e_horizontal_left, pdftron.PDF.Stamper.VerticalAlignment.e_vertical_bottom);
s.SetSize(pdftron.PDF.Stamper.SizeType.e_absolute_size, rect.x2 - rect.x1, rect.y2 - rect.y1);
s.SetPosition(rect.x1, rect.y1);
s.SetAsBackground(false);
s.SetOpacity(.3);
s.StampImage(_currentDoc, img, new PageSet(stp.Page()));
}
var annot = page.GetAnnot(page.GetNumAnnots() - 1);
stp.RectArea(AnnotationsMannager.ConvertRect(annot.GetRect()));
return(annot);
}
/// <summary>
/// Stamp a JPEG image to a PDF document in a specific position
/// </summary>
/// <param name="doc">PDF Document to add the barcode</param>
/// <param name="jpegBytes">The encoded JPEG byte array</param>
/// <param name="h">Horizontal position</param>
/// <param name="v">Vertical position</param>
private void StampToPage(PDFDoc doc, byte[] jpegBytes, double h, double v)
{
// Stamping PDF file
pdftron.PDF.Image barcodeImage = pdftron.PDF.Image.Create(doc.GetSDFDoc(), jpegBytes);
Stamper barcodeStamp = new Stamper(StamperSizeType.e_absolute_size, 150, 150);
//set position of the image to the center, left of PDF pages
barcodeStamp.SetAlignment(StamperHorizontalAlignment.e_horizontal_left, StamperVerticalAlignment.e_vertical_bottom);
barcodeStamp.SetAsAnnotation(true);
double xPos = h - (150 / 2);
double yPos = v - (150 / 2);
barcodeStamp.SetPosition(xPos, yPos);
barcodeStamp.SetFontColor(new ColorPt(0, 0, 0, 0));
//barcodeStamp.SetRotation(180);
barcodeStamp.SetAsBackground(false);
// Stamp current viewing page
barcodeStamp.StampImage(doc, barcodeImage, new PageSet(PDFViewCtrl.GetCurrentPage(), PDFViewCtrl.GetCurrentPage()));
// Render current visible region
PDFViewCtrl.Update();
}
static void ImageExtract(PDFDoc doc, ElementReader reader)
{
Element element;
while ((element = reader.Next()) != null)
{
switch (element.GetType())
{
case Element.Type.e_image:
case Element.Type.e_inline_image:
{
Console.WriteLine("--> Image: {0}", ++image_counter);
Console.WriteLine(" Width: {0}", element.GetImageWidth());
Console.WriteLine(" Height: {0}", element.GetImageHeight());
Console.WriteLine(" BPC: {0}", element.GetBitsPerComponent());
Matrix2D ctm = element.GetCTM();
double x2 = 1, y2 = 1, y1 = ctm.m_v;
ctm.Mult(ref x2, ref y2);
// Write the coords to 3 decimal places.
Console.WriteLine(" Coords: x1={0:N2}, y1={1:N2}, x2={2:N2}, y2={3:N2}", ctm.m_h, ctm.m_v, x2, y2);
pdftron.PDF.Image image = null;
if (element.GetType() == Element.Type.e_image)
{
image = new pdftron.PDF.Image(element.GetXObject());
// Convert PDF bitmap to GDI+ Bitmap...
//Bitmap bmp = element.GetBitmap();
//bmp.Save(fname, ImageFormat.Png);
//bmp.Dispose();
// Instead of converting PDF images to a Bitmap, you can also extract
// uncompressed/compressed image data directly using element.GetImageData()
// as illustrated in ElementReaderAdv sample project.
}
else // inline image
{
if (y1 > y2)
{
byte[] flipped_image = FlipImage(element);
image = pdftron.PDF.Image.Create(doc, flipped_image, element.GetImageWidth(), element.GetImageHeight(), 8, ColorSpace.CreateDeviceRGB());
}
else
{
Image2RGB image2rgb = new Image2RGB(element);
FilterReader image_reader = new FilterReader(image2rgb);
image = pdftron.PDF.Image.Create(doc, image_reader, element.GetImageWidth(), element.GetImageHeight(), 8, ColorSpace.CreateDeviceRGB());
}
}
string fname = output_path + "image_extract1_" + image_counter.ToString();
image.Export(fname); // or ExporAsPng() or ExporAsTiff() ...
break;
}
case Element.Type.e_form: // Process form XObjects
{
reader.FormBegin();
ImageExtract(doc, reader);
reader.End();
break;
}
}
}
}
/// <summary>
/// The main entry point for the application.
/// </summary>
static void Main()
{
// Initialize PDFNet before calling any other PDFNet function.
PDFNet.Initialize();
string input_path = "../../TestFiles/";
string output_path = "../../TestFiles/Output/";
string input_filename = "US061222892-a.pdf";
PDFDoc pdf_doc = new PDFDoc(input_path + input_filename);
pdf_doc.InitSecurityHandler();
SDFDoc cos_doc = pdf_doc.GetSDFDoc();
int num_objs = cos_doc.XRefSize();
for (int i = 1; i < num_objs; ++i)
{
Obj obj = cos_doc.GetObj(i);
if (obj != null && !obj.IsFree() && obj.IsStream())
{
// Process only images
DictIterator itr = obj.Find("Subtype");
if (!itr.HasNext() || itr.Value().GetName() != "Image")
{
continue;
}
pdftron.PDF.Image input_image = new pdftron.PDF.Image(obj);
pdftron.PDF.Image new_image = null;
// Process only gray-scale images
if (input_image.GetComponentNum() != 1)
{
continue;
}
int bpc = input_image.GetBitsPerComponent();
if (bpc != 1) // Recompress 1 BPC images
{
continue;
}
// Skip images that are already compressed using JBIG2
itr = obj.Find("Filter");
if (itr.HasNext() && itr.Value().IsName() &&
itr.Value().GetName() == "JBIG2Decode")
{
continue;
}
FilterReader reader = new FilterReader(obj.GetDecodedStream());
ObjSet hint_set = new ObjSet();
Obj hint = hint_set.CreateArray();
hint.PushBackName("JBIG2");
hint.PushBackName("Lossless");
hint.PushBackName("Threshold");
hint.PushBackNumber(0.4);
hint.PushBackName("SharePages");
hint.PushBackNumber(10000);
new_image = pdftron.PDF.Image.Create(
cos_doc,
reader,
input_image.GetImageWidth(),
input_image.GetImageHeight(),
1,
ColorSpace.CreateDeviceGray(),
hint // A hint to image encoder to use JBIG2 compression
);
Obj new_img_obj = new_image.GetSDFObj();
// Copy any important entries from the image dictionary
itr = obj.Find("ImageMask");
if (itr.HasNext())
{
new_img_obj.Put("ImageMask", itr.Value());
}
itr = obj.Find("Mask");
if (itr.HasNext())
{
new_img_obj.Put("Mask", itr.Value());
}
cos_doc.Swap(i, new_image.GetSDFObj().GetObjNum());
}
}
pdf_doc.Save(output_path + "US061222892_JBIG2.pdf", SDFDoc.SaveOptions.e_remove_unused);
pdf_doc.Close();
}
static void Main(string[] args)
{
PDFNet.Initialize();
// Example 1:
// Extract images by traversing the display list for
// every page. With this approach it is possible to obtain
// image positioning information and DPI.
try
{
using (PDFDoc doc = new PDFDoc(input_path + "newsletter.pdf"))
using (ElementReader reader = new ElementReader())
{
doc.InitSecurityHandler();
PageIterator itr;
for (itr = doc.GetPageIterator(); itr.HasNext(); itr.Next())
{
reader.Begin(itr.Current());
ImageExtract(doc, reader);
reader.End();
}
Console.WriteLine("Done.");
}
}
catch (PDFNetException e)
{
Console.WriteLine(e.Message);
}
Console.WriteLine("----------------------------------------------------------------");
// Example 2:
// Extract images by scanning the low-level document.
try
{
using (PDFDoc doc = new PDFDoc(input_path + "newsletter.pdf"))
{
doc.InitSecurityHandler();
image_counter = 0;
SDFDoc cos_doc = doc.GetSDFDoc();
int num_objs = cos_doc.XRefSize();
for (int i = 1; i < num_objs; ++i)
{
Obj obj = cos_doc.GetObj(i);
if (obj != null && !obj.IsFree() && obj.IsStream())
{
// Process only images
DictIterator itr = obj.Find("Subtype");
if (!itr.HasNext() || itr.Value().GetName() != "Image")
{
continue;
}
itr = obj.Find("Type");
if (!itr.HasNext() || itr.Value().GetName() != "XObject")
{
continue;
}
pdftron.PDF.Image image = new pdftron.PDF.Image(obj);
Console.WriteLine("--> Image: {0}", ++image_counter);
Console.WriteLine(" Width: {0}", image.GetImageWidth());
Console.WriteLine(" Height: {0}", image.GetImageHeight());
Console.WriteLine(" BPC: {0}", image.GetBitsPerComponent());
string fname = output_path + "image_extract2_" + image_counter.ToString();
image.Export(fname); // or ExporAsPng() or ExporAsTiff() ...
// Convert PDF bitmap to GDI+ Bitmap...
//Bitmap bmp = image.GetBitmap();
//bmp.Save(fname, ImageFormat.Png);
//bmp.Dispose();
// Instead of converting PDF images to a Bitmap, you can also extract
// uncompressed/compressed image data directly using element.GetImageData()
// as illustrated in ElementReaderAdv sample project.
}
}
}
}
catch (PDFNetException e)
{
Console.WriteLine(e.Message);
}
}
