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);
Related
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();
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);
}
The image is not displayed correctly in my PDF (iText) when I access thru my Java code.
It displays partially with the first half of the image displaying properly and the remaining half displays with a lot of lines on top of the image. (the images seems to be downloading very slow when other text show up fast).
I use iTextPdf version 5.4.0 jar file and I access the image thru URL (get the image URL)
in my java code.
Please let me know why this happens. If you need any additional info please let me know and I can provide.
Thanks in advance for any help.
Im also faced Same issue, later we solved. Please find the below code, hope it will help for you.
HTML FILE
<html>
<body>
<font color="green">Test</font><br/>
<table>
<tr><td><img src="Desert.jpg" height="300" width="300"/></td></tr>
</table>
</body>
</html>
Java File
class PageWithRectangle extends PdfPageEventHelper
{
public void onEndPage(PdfWriter writer, Document document)
{
PdfContentByte cb = writer.getDirectContent();
Rectangle pageSize = writer.getPageSize();
cb.rectangle(pageSize.getLeft() + 3, pageSize.getBottom() + 3,
pageSize.getWidth() - 6, pageSize.getHeight() - 6);
cb.stroke();
}
}
public class pdfTest {
private static String getUrlSource(String url) throws IOException {
URL webpage = new URL(url);
URLConnection yc = webpage.openConnection();
BufferedReader in = new BufferedReader(new InputStreamReader(
yc.getInputStream(), "UTF-8"));
String inputLine;
StringBuilder a = new StringBuilder();
while ((inputLine = in.readLine()) != null)
{
a.append(inputLine);
System.out.println(inputLine);
}
in.close();
return a.toString();
}
public static void main(String[] args) {
try {
File baseDir = new File(".");
File outDir = new File(baseDir, "out");
outDir.mkdirs();
String k = getUrlSource("file:\\C:\\test.html");
OutputStream file = new FileOutputStream(new File(outDir+"/Test.pdf"));
Document document = new Document();
PdfWriter writer = PdfWriter.getInstance(document, file);
writer.setPageEvent(new PageWithRectangle());
document.open();
HTMLWorker htmlWorker = new HTMLWorker(document);
htmlWorker.parse(new StringReader(k));
document.close();
file.close();
System.out.println("\nSuccess");
} catch (Exception e) {
e.printStackTrace();
}
}
}
My Old HTML Code(Gave wrong pdf while generate through java)
<html>
<body>
<font color="green">Test</font><br/>
<img src="Desert.jpg" height="300" width="300"/>
</body>
</html>
Solution : give image tag under table tag
Regards,
Praveen
I also have experienced this issues using iText 5.5.5 and found the issue affecting GIF's with alpha channel set. Either remove the alpha or try saving as a jpg. This worked for me.
I would like to open an existing pdf, add some text and then output as content disposition using itext sharp. I have the following code. Where it falls down it is that i want to output as memory stream but need to filestream to open the original file.
Here's what i have. Obviously defining PdfWriter twice won't work.
public static void Create(string path)
{
var Response = HttpContext.Current.Response;
Response.Clear();
Response.ContentType = "application/pdf";
System.IO.MemoryStream m = new System.IO.MemoryStream();
Document document = new Document();
PdfWriter wri = PdfWriter.GetInstance(document, new FileStream(path, FileMode.Create));
PdfWriter.GetInstance(document, m);
document.Open();
document.Add(new Paragraph(DateTime.Now.ToString()));
document.NewPage();
document.Add(new Paragraph("Hello World"));
document.Close();
Response.OutputStream.Write(m.GetBuffer(), 0, m.GetBuffer().Length);
Response.OutputStream.Flush();
Response.OutputStream.Close();
Response.End();
}
You've got a couple of problems that I'll try to walk you through.
First, the Document object is only for working with new PDFs, not modifying existing ones. Basically the Document object is a bunch of wrapper classes that abstract away the underlying parts of the PDF spec and allow you to work with higher level things like paragraphs and reflowable content. These abstractions turn what you think of "paragraphs" into raw commands that write the paragraph one line at a time with no relationship between lines. When working with an existing document there's no safe way to say how to reflow text so these abstractions aren't used.
Instead you want to use the PdfStamper object. When working with this object you have two choices for how to work with potentially overlapping content, either your new text gets written on top of existing content or your text gets written below it. The two methods GetOverContent() or GetUnderContent() of an instantiated PdfStamper object will return a PdfContentByte object that you can then write text with.
There's two main ways to write text, either manually or through a ColumnText object. If you've done HTML you can think of the ColumnText object as using a big fixed-position single row, single column <TABLE>. The advantage of the ColumnText is that you can use the higher level abstractions such as Paragraph.
Below is a full working C# 2010 WinForms app targeting iTextSharp 5.1.2.0 that show off the above. See the code comments for any questions. It should be pretty easy to convert this to ASP.Net.
using System;
using System.IO;
using System.Windows.Forms;
using iTextSharp.text;
using iTextSharp.text.pdf;
namespace WindowsFormsApplication1 {
public partial class Form1 : Form {
public Form1() {
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e) {
string existingFile = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Desktop), "file1.pdf");
string newFile = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Desktop), "file2.pdf");
using (FileStream fs = new FileStream(existingFile, FileMode.Create, FileAccess.Write, FileShare.None)) {
using (Document doc = new Document(PageSize.LETTER)) {
using (PdfWriter writer = PdfWriter.GetInstance(doc, fs)) {
doc.Open();
doc.Add(new Paragraph("This is a test"));
doc.Close();
}
}
}
//Bind a PdfReader to our first document
PdfReader reader = new PdfReader(existingFile);
//Create a new stream for our output file (this could be a MemoryStream, too)
using (FileStream fs = new FileStream(newFile, FileMode.Create, FileAccess.Write, FileShare.None)) {
//Use a PdfStamper to bind our source file with our output file
using (PdfStamper stamper = new PdfStamper(reader, fs)) {
//In case of conflict we want our new text to be written "on top" of any existing content
//Get the "Over" state for page 1
PdfContentByte cb = stamper.GetOverContent(1);
//Begin text command
cb.BeginText();
//Set the font information
cb.SetFontAndSize(BaseFont.CreateFont(BaseFont.HELVETICA, BaseFont.CP1250, false), 16f);
//Position the cursor for drawing
cb.MoveText(50, 50);
//Write some text
cb.ShowText("This was added manually");
//End text command
cb.EndText();
//Create a new ColumnText object to write to
ColumnText ct = new ColumnText(cb);
//Create a single column who's lower left corner is at 100x100 and upper right is at 500x200
ct.SetSimpleColumn(100,100,500,200);
//Add a higher level object
ct.AddElement(new Paragraph("This was added using ColumnText"));
//Flush the text buffer
ct.Go();
}
}
this.Close();
}
}
}
As to your second problem about the FileStream vs MemoryStream, if you look at the method signature for almost every (actually all as far as I know) method within iTextSharp you'll see that they all take a Stream object and not just a FileStream object. Any time you see this, even outside of iTextSharp, this means that you can pass in any subclass of Stream which includes the MemoryStream object, everything else stays the same.
The code below is a slightly modified version of the one above. I've removed most of the comments to make it shorter. The main change is that we're using a MemoryStream instead of a FileStream. Also, when we're done with the PDF when need to close the PdfStamper object before accessing the raw binary data. (The using statment will do this for us automatically later but it also closes the stream so we need to manually do it here.)
One other thing, never, ever use the GetBuffer() method of the MemoryStream. It sounds like what you want (and I have mistakenly used it, too) but instead you want to use ToArray(). GetBuffer() includes uninitialized bytes which usually produces corrupt PDFs. Also, instead of writing to the HTTP Response stream I'm saving the bytes to array first. From a debugging perspective this allows me to finish all of my iTextSharp and System.IO code and make sure that it is correct, then do whatever I want with the raw byte array. In my case I don't have a web server handy so I'm writing them to disk but you could just as easily call Response.BinaryWrite(bytes)
string existingFile = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Desktop), "file1.pdf");
string newFile = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Desktop), "file2.pdf");
PdfReader reader = new PdfReader(existingFile);
byte[] bytes;
using(MemoryStream ms = new MemoryStream()){
using (PdfStamper stamper = new PdfStamper(reader, ms)) {
PdfContentByte cb = stamper.GetOverContent(1);
ColumnText ct = new ColumnText(cb);
ct.SetSimpleColumn(100,100,500,200);
ct.AddElement(new Paragraph("This was added using ColumnText"));
ct.Go();
//Flush the PdfStamper's buffer
stamper.Close();
//Get the raw bytes of the PDF
bytes = ms.ToArray();
}
}
//Do whatever you want with the bytes
//Below I'm writing them to disk but you could also write them to the output buffer, too
using (FileStream fs = new FileStream(newFile, FileMode.Create, FileAccess.Write, FileShare.None)) {
fs.Write(bytes, 0, bytes.Length);
}
The second part of your question title says:
"outputting as content disposition"
If that's what you really want you can do this:
Response.AddHeader("Content-Disposition", "attachment; filename=DESIRED-FILENAME.pdf");
Using a MemoryStream is unnecessary, since Response.OutputStream is available. Your example code is calling NewPage() and not trying to add the text to an existing page of your PDF, so here's one way to do what you asked:
Response.ContentType = "application/pdf";
Response.AddHeader("Content-Disposition", "attachment; filename=itextTest.pdf");
PdfReader reader = new PdfReader(readerPath);
// store the extra text on the last (new) page
ColumnText ct = new ColumnText(null);
ct.AddElement(new Paragraph("Text on a new page"));
int numberOfPages = reader.NumberOfPages;
int newPage = numberOfPages + 1;
// get all pages from PDF "template" so we can copy them below
reader.SelectPages(string.Format("1-{0}", numberOfPages));
float marginOffset = 36f;
/*
* we use the selected pages above with a PdfStamper to copy the original.
* and no we don't need a MemoryStream...
*/
using (PdfStamper stamper = new PdfStamper(reader, Response.OutputStream)) {
// use the same page size as the __last__ template page
Rectangle rectangle = reader.GetPageSize(numberOfPages);
// add a new __blank__ page
stamper.InsertPage(newPage, rectangle);
// allows us to write content to the (new/added) page
ct.Canvas = stamper.GetOverContent(newPage);
// add text at an __absolute__ position
ct.SetSimpleColumn(
marginOffset, marginOffset,
rectangle.Right - marginOffset, rectangle.Top - marginOffset
);
ct.Go();
}
I think you've already figured out that the Document / PdfWriter combination doesn't work in this situation :) That's the standard method for creating a new PDF document.
All of the examples I have seen so far using ITextSharp start from scratch and create a new document, add something to it and close it.
What if I need to do multiple things to a PDF for example I want to add a paragraph and then add a line.
For example if I run this simple console app in which I just create a PDF and add a paragraph and then close it everything runs fine.
class Program
{
static void Main(string[] args)
{
Document pdfDoc = new Document();
PdfWriter.GetInstance(pdfDoc, new FileStream("TestPDF.pdf", FileMode.Create));
pdfDoc.Open();
pdfDoc.Add(new Paragraph("Some Text added"));
pdfDoc.Close();
Console.WriteLine("The file was created.");
Console.ReadLine();
}
}
However if I need to do something else like draw a line like this
class Program
{
static void Main(string[] args)
{
Document pdfDoc = new Document();
PdfWriter.GetInstance(pdfDoc, new FileStream("TestPDF.pdf", FileMode.Create));
pdfDoc.Open();
pdfDoc.Add(new Paragraph("Some Text added"));
PdfWriter writer = PdfWriter.GetInstance(pdfDoc, new FileStream("TestPDF.pdf", FileMode.OpenOrCreate));
PdfContentByte cb = writer.DirectContent;
cb.MoveTo(pdfDoc.PageSize.Width / 2, pdfDoc.PageSize.Height / 2);
cb.LineTo(pdfDoc.PageSize.Width / 2, pdfDoc.PageSize.Height);
cb.Stroke();
writer.Close();
pdfDoc.Close();
Console.WriteLine("The file was created.");
Console.ReadLine();
}
}
I get an error when trying to open the file because it is already opened by pdfDoc.
If I put the highlighted code after the pdfDoc.Close() I get an error saying "The Document is not opened"
How do I switch from adding text to adding a line?
Do I need to close the doc and then re-open it again with the PDFReader and modify it there or can I do it all at once?
You're getting an error because you're trying to request a second instance of a PDFWriter when you already have one. The second PdfWriter.GetInstance(pdfDoc, new FileStream("TestPDF.pdf", FileMode.OpenOrCreate)); is not needed. I made a small edit to your code and this now seems to work
Document pdfDoc = new Document();
PdfWriter writer = PdfWriter.GetInstance(pdfDoc, new FileStream("TestPDF.pdf", FileMode.OpenOrCreate));
pdfDoc.Open();
pdfDoc.Add(new Paragraph("Some Text added"));
PdfContentByte cb = writer.DirectContent;
cb.MoveTo(pdfDoc.PageSize.Width / 2, pdfDoc.PageSize.Height / 2);
cb.LineTo(pdfDoc.PageSize.Width / 2, pdfDoc.PageSize.Height);
cb.Stroke();
pdfDoc.Close();
Console.WriteLine("The file was created.");
Console.ReadLine();