I'm trying to create a pdf file by combining multiple jpg images using iTextsharp.Its coming up good but in some pdfs error is popping up as 'internal error occured' and image is not visible on page. pls assist.
Document doc = new iTextSharp.text.Document();
iTextSharp.text.pdf.PdfWriter.GetInstance(doc, new FileStream(outputpath, FileMode.Create));
doc.Open();
foreach (string name in imagename)
{
string imagePath = ImageLocation + name;
iTextSharp.text.Image image = iTextSharp.text.Image.GetInstance(imagePath);
doc.SetPageSize(image);
doc.NewPage();
image.SetAbsolutePosition(0,0);
doc.Add(image);
}
doc.Close();
Related
I am using itextpdf html2pdf tool to implement freemarker template to generate pdf
Refer to the official documentation link：
https://kb.itextpdf.com/home/it7kb/ebooks/itext-7-converting-html-to-pdf-with-pdfhtml/chapter-7-frequently-asked-questions-about-pdfhtml/can-pdfhtml-render-base64-images-to-pdf
The front end uses echarts to convert the image to base64.
The picture can be displayed clearly on the browser, but after the pdf is generated, the picture becomes blurry.
Refer to html and pdf image comparison：
html pdf
public static void main(String[] args) throws Exception{
File file = FileUtil.newFile("D:/test.html");
BufferedOutputStream outputStream = FileUtil.getOutputStream("D:/test.pdf");
BufferedInputStream inputStream = FileUtil.getInputStream(file);
ConverterProperties converterProperties=new ConverterProperties();
FontProvider fontProvider=new DefaultFontProvider();
FontProgram fontProgram = FontProgramFactory.createFont(Constant.CONFIG_PATH+File.separator+"simsun.ttc,1");
fontProvider.addFont(fontProgram);
MediaDeviceDescription mediaDeviceDescription = new MediaDeviceDescription(MediaType.SCREEN);
mediaDeviceDescription.setResolution(2000f);
converterProperties.setFontProvider(fontProvider);
converterProperties.setMediaDeviceDescription(mediaDeviceDescription);
PdfDocument pdfDoc = new PdfDocument(new PdfWriter(outputStream));
pdfDoc.setDefaultPageSize(new PageSize(1000,1700));
HtmlConverter.convertToPdf(inputStream,pdfDoc,converterProperties);
}
I'm having an issue when attempting to create a PDF with an image using iTextSharp. I'm adding the image to the top of the PDF like a masthead and then the rest of the PDF is HTML. The PDF generates fine and displays correctly when viewed in Edge, Chrome and Firefox. But, if you open it in IE or in Adobe Reader, the masthead is completely scrambled. The rest of the PDF (the HTML content) generates as expected in all browsers and programs. I've googled for days now trying to discover if anyone else has had this issue, but all I can find is text being garbled, not images. Below is the code I'm using to generate the image. Any ideas?
using (var document = new Document(PageSize.A4, 10f, 10f, 10f, 10f))
{
iTextSharp.text.Image image = iTextSharp.text.Image.GetInstance(Server.MapPath("~/Content/Images/kfa_masthead.jpg"));
using (var ms = new MemoryStream())
{
image.Left = 10f;
image.Top = image.Height;
image.ScaleAbsolute(560f, 58f);
using (var writer = PdfWriter.GetInstance(document, ms))
{
document.Open();
writer.CloseStream = false;
//Add the masthead
document.Add(image);
//Add the report information
var html = CreateTable(profile);
using (var xHtml = new StringReader(html))
{
XMLWorkerHelper.GetInstance().ParseXHtml(writer, document, xHtml);
}
document.CloseDocument();
document.Close();
}
return ms.ToArray();
}
}
I'm using the below code to save the content of a ScrollPane in my JavaFx Application to a PDF file.
button.setOnMouseClicked(new EventHandler<MouseEvent>() {
public void handle(MouseEvent event) {
File pdfFile = fileChooser.showSaveDialog(primaryStage);
try {
BufferedImage bufImage = SwingFXUtils.fromFXImage(scrollPane.snapshot(new SnapshotParameters(), null), null);
FileOutputStream out = new FileOutputStream(new File("../temp.jpg"));
javax.imageio.ImageIO.write(bufImage, "jpg", out);
out.flush();
out.close();
com.itextpdf.text.Image image =com.itextpdf.text.Image.getInstance("../temp.jpg");
Document doc = new Document(new com.itextpdf.text.Rectangle(image.getScaledWidth(), image.getScaledHeight()));
FileOutputStream fos = new FileOutputStream(pdfFile);
PdfWriter.getInstance(doc, fos);
doc.open();
doc.newPage();
image.setAbsolutePosition(0, 0);
doc.add(image);
fos.flush();
doc.close();
fos.close();
}
catch(Exception e)
{
e.printStackTrace();
}
}
});
In the scrollpane, I have a very long VBox which contains almost 40-50 labels. So, this code initially saves it to a jpg file and then adds it to a pdf file.
When the temp.jpg is created initially, due to its length, the jpg file looks very thin. It should be zoomed to see the actual content.
When the pdf file is written, it was blank except that it was lengthy as it would have been when the jpg is really converted to a PDF file.
Can anyone help me fix this ? to take the snapshot of the ScrollPane to PDF with its actual size/scale ?
I have first scaled the image and then created document with scaled PageSize. This fixed the issue
com.itextpdf.text.Image image =com.itextpdf.text.Image.getInstance("../temp.jpg");
image.scalePercent(1);
Document doc = new Document(new com.itextpdf.text.Rectangle(image.getScaledWidth(), image.getScaledHeight()));
doc.open();
doc.add(image);
I'm using iTextSharp to update an image object in a PDF with a modified System.Drawing.Image. How do I properly set the PdfName.COLORSPACE and PdfName.FILTER based on the System.Drawing.Image? I'm not sure which System.Drawing.Image properties can be used for the mappings.
private void SetImageData(PdfImageObject pdfImage, System.Drawing.Image image, byte[] imageData)
{
PRStream imgStream = (PRStream)pdfImage.GetDictionary();
imgStream.Clear();
imgStream.SetData(imageData, false, PRStream.NO_COMPRESSION);
imgStream.Put(PdfName.TYPE, PdfName.XOBJECT);
imgStream.Put(PdfName.SUBTYPE, PdfName.IMAGE);
imgStream.Put(PdfName.WIDTH, new PdfNumber(image.Width));
imgStream.Put(PdfName.HEIGHT, new PdfNumber(image.Height));
imgStream.Put(PdfName.LENGTH, new PdfNumber(imageData.LongLength));
// Not sure how to properly set these entries based on the image properties
imgStream.Put(PdfName.BITSPERCOMPONENT, 8);
imgStream.Put(PdfName.COLORSPACE, PdfName.DEVICERGB);
imgStream.Put(PdfName.FILTER, PdfName.DCTDECODE);
}
I took the advice of Chris Haas and cheated by writing the System.Drawing.Image to a temporary PDF and then read it back out as a PdfImageObject.
using (MemoryStream ms = new MemoryStream())
{
using (iTextSharp.text.Document doc = new iTextSharp.text.Document())
{
using (iTextSharp.text.pdf.PdfWriter writer = iTextSharp.text.pdf.PdfWriter.GetInstance(doc))
{
doc.Open();
iTextSharp.text.Image image = iTextSharp.text.Image.GetInstance(drawingImage, drawingImage.RawFormat);
image.SimplifyColorspace();
doc.Add(image);
doc.Close();
}
}
... code that opens the mem stream with PdfReader and retrieves the image as PdfImageObj...
}
That worked but seemed like allot of side stepping for a cheat. I stepped through the code in the call to doc.Add(image) and found that eventually a PdfImage object was created from the iTextSharp.text.Image object and the PdfImage object contained all the dictionary entries that I needed. So I decided to cut some corners on the original cheat and come up with this as my final solution:
private void SetImageData(PdfImageObject pdfImageObj, byte[] imageData)
{
iTextSharp.text.Image image = iTextSharp.text.Image.GetInstance(imageData);
image.SimplifyColorSpace();
PdfImage tempPdfImage = new PdfImage(image, "TempImg", null);
PRStream imgStream = (PRStream)pdfImageObj.GetDictionary();
imgStream.Clear();
imgStream.SetDataRaw(imageData);
imgStream.Merge(tempPdfImage);
}
I'm having a problem trying to locate a PdfContentByte directly into an specific page. My problem is: I need to add an Image for each page (That works) and need to add a QRCode to each of the pages at the right bottom corner but this works only for the first Page and I don't know how to repeat it on the other ones.
This is my code:
public string GeneratePDFDocument(Atomic.Development.Montenegro.Data.Entities.Document document, Stamp stamp)
{
string filename = #"C:\Users\Sheldon\Desktop\Pdf.Pdf";
FileStream fs = new FileStream(filename, FileMode.Create);
iTextSharp.text.Document pdfDocument = new iTextSharp.text.Document(PageSize.LETTER, PAGE_LEFT_MARGIN, PAGE_RIGHT_MARGIN, PAGE_TOP_MARGIN, PAGE_BOTTOM_MARGIN);
iTextSharp.text.pdf.PdfWriter writer = iTextSharp.text.pdf.PdfWriter.GetInstance(pdfDocument, fs);
pdfDocument.Open();
int count = document.Pages.Count;
foreach (Page page in document.Pages)
{
Image img = Image.GetInstance(page.Image);
img.ScaleToFit(PageSize.LETTER.Width-(PAGE_LEFT_MARGIN + PAGE_RIGHT_MARGIN), PageSize.LETTER.Height-(PAGE_TOP_MARGIN + PAGE_BOTTOM_MARGIN));
pdfDocument.Add(img);
PlaceCodeBar(writer);
}
pdfDocument.Close();
writer.Close();
fs.Close();
return filename;
}
private static void PlaceCodeBar(iTextSharp.text.pdf.PdfWriter writer)
{
String codeText = "TEXT TO ENCODE";
iTextSharp.text.pdf.BarcodePDF417 pdf417 = new iTextSharp.text.pdf.BarcodePDF417();
pdf417.SetText(codeText);
Image img = pdf417.GetImage();
iTextSharp.text.pdf.BarcodeQRCode qrcode = new iTextSharp.text.pdf.BarcodeQRCode(codeText, 1, 1, null);
img = qrcode.GetImage();
iTextSharp.text.pdf.PdfContentByte cb = writer.DirectContent;
cb.SaveState();
cb.BeginText();
img.SetAbsolutePosition(PageSize.LETTER.Width-PAGE_RIGHT_MARGIN-img.ScaledWidth, PAGE_BOTTOM_MARGIN);
cb.AddImage(img);
cb.EndText();
cb.RestoreState();
}
So add it in your foreach (Page...) loop:
foreach (Page page in document.Pages)
{
Image img = Image.GetInstance(page.Image);
img.ScaleToFit(PageSize.LETTER.Width-(PAGE_LEFT_MARGIN + PAGE_RIGHT_MARGIN), PageSize.LETTER.Height-(PAGE_TOP_MARGIN + PAGE_BOTTOM_MARGIN));
pdfDocument.Add(img);
PlaceCodeBar(writer);
}
If this is a second pass on the same PDF (you've closed it then opened it again), use a PdfStamper rather than a PdfWriter. You can then get the direct content of each page rather than the one direct content that is reused (and reset) for each page.
PS: Drop the BeginText() and EndText() calls. Those operators should only be used when actually drawing text/setting fonts/etc. No line art. No images. The SaveState()/RestoreState() are good though. Definitely keep those.
I just figure out how to solve the problem. Just delete the cb.SaveState() and cb.RestoreState() and it put the image on the page is actually active.