I have to combine multiple pages from several files into new one PDF. The page orientation of all the pages must be portrait.
After this work is done, I am using a couple of programs to reset the rotation to zero without really rotate the page.
I want to use itext to remove the rotation value.
Taked from itext examples, I've tried something like this:
protected void manipulatePdf(String dest) throws Exception {
PdfDocument pdfDoc = new PdfDocument(new PdfReader(SRC), new PdfWriter(DEST));
int n = pdfDoc.getNumberOfPages();
PdfPage page;
PdfNumber rotate;
for (int p = 1; p <= n; p++) {
page = pdfDoc.getPage(p);
rotate = page.getPdfObject().getAsNumber(PdfName.Rotate);
page.setRotation(0);
pdfDoc.close();
}
}
This:
PdfDictionary diccionario = page.getPdfObject();
diccionario.Remove(iText.Kernel.Pdf.PdfName.Rotate);
And the function CopyPagesTo with the same result: The pages orientation has been altered.
Here there is an example file with 0, 90, 180 y 270 degrees.
The goal is set rotate value of all pages to zero keeping portrait mode:
https://filebin.ca/4vep0uuU1p2s/1.pdf
Any advice would be greatly appreciated.
I have found a solution using the SetIgnorePageRotationForContent function.
VB.NET example:
Dim srcPdf As iText.Kernel.Pdf.PdfDocument = New iText.Kernel.Pdf.PdfDocument(New iText.Kernel.Pdf.PdfReader(srcFile))
Dim destPDF As New iText.Kernel.Pdf.PdfDocument(New iText.Kernel.Pdf.PdfWriter(destFile))
For contador = 1 To srcPdf.GetNumberOfPages
Dim srcPage = srcPdf.GetPage(contador)
Dim rotacion As iText.Kernel.Pdf.PdfNumber = srcPage.GetPdfObject().GetAsNumber(iText.Kernel.Pdf.PdfName.Rotate)
If IsNothing(rotacion) OrElse rotacion.IntValue = 0 Then
srcPdf.CopyPagesTo(contador, contador, destPDF)
Continue For
End If
Dim destPage As iText.Kernel.Pdf.PdfPage = destPDF.AddNewPage(New iText.Kernel.Geom.PageSize(srcPage.GetPageSizeWithRotation))
If rotacion.IntValue = 180 Then
destPage.GetPdfObject().Put(iText.Kernel.Pdf.PdfName.Rotate, New iText.Kernel.Pdf.PdfNumber(180))
Else
destPage.GetPdfObject().Put(iText.Kernel.Pdf.PdfName.Rotate, New iText.Kernel.Pdf.PdfNumber(rotacion.IntValue + 180))
End If
destPage.SetIgnorePageRotationForContent(True)
Dim canvas As New iText.Kernel.Pdf.Canvas.PdfCanvas(destPage)
Dim pageCopy As iText.Kernel.Pdf.Xobject.PdfFormXObject = srcPage.CopyAsFormXObject(destPDF)
canvas.AddXObject(pageCopy, 0, 0)
destPage.GetPdfObject().Remove(iText.Kernel.Pdf.PdfName.Rotate)
Next
destPDF.Close()
srcPdf.Close()
How to get byte array from Itext PDFReader.
float width = 8.5f * 72;
float height = 11f * 72;
float tolerance = 1f;
PdfReader reader = new PdfReader("source.pdf");
for (int i = 1; i <= reader.getNumberOfPages(); i++)
{
Rectangle cropBox = reader.getCropBox(i);
float widthToAdd = width - cropBox.getWidth();
float heightToAdd = height - cropBox.getHeight();
if (Math.abs(widthToAdd) > tolerance || Math.abs(heightToAdd) > tolerance)
{
float[] newBoxValues = new float[] {
cropBox.getLeft() - widthToAdd / 2,
cropBox.getBottom() - heightToAdd / 2,
cropBox.getRight() + widthToAdd / 2,
cropBox.getTop() + heightToAdd / 2
};
PdfArray newBox = new PdfArray(newBoxValues);
PdfDictionary pageDict = reader.getPageN(i);
pageDict.put(PdfName.CROPBOX, newBox);
pageDict.put(PdfName.MEDIABOX, newBox);
}
}
From above code I need to get byte array from reader object. How?
1) Not working, getting empty byteArray.
OutputStream out = new ByteArrayOutputStream();
PdfStamper stamper = new PdfStamper(reader, out);
stamper.close();
byte byteArray[] = (((ByteArrayOutputStream)out).toByteArray());
2) Not working, getting java.io.IOException: Error: Header doesn't contain versioninfo
ByteArrayOutputStream outputStream = new ByteArrayOutputStream( );
for (int i = 1; i <= reader.getNumberOfPages(); i++)
{
outputStream.write(reader.getPageContent(i));
}
PDDocument pdDocument = new PDDocument().load(outputStream.toByteArray( );)
Is there any other way to get byte array from PDFReader.
Let's take a the question from a different angle. It seems to me that you want to render a PDF page by page. If so, then your question is all wrong. Extracting the page content stream will not be sufficient as I already indicated: not a single renderer will be able to render such a stream because you don't pass any resources such as fonts, Form and Image XObjects,...
If you want to render separate pages from a PDF, you need to burst the document into separate single page full-blown PDF documents. These single page documents need to contain all the necessary information to render the page. This isn't memory friendly: suppose that you have a 100 KByte document of 10 pages where every page shows an 80 KByte logo, you'll end up with 10 documents that are each at least 80 KByte (times 10 makes already 800 KByte which is much more than the 10-page document where a single Image XObject is shared by the 10 pages).
You'd need to do something like this:
PdfReader reader = new PdfReader("source.pdf");
int n = reader.getNumberOfPages();
reader close();
ByteArrayOutputStream boas;
PdfStamper stamper;
for (int i = 0; i < n; ) {
reader = new PdfReader("source.pdf");
reader.selectPages(String.valueOf(++i));
baos = new ByteArrayOutputStream();
stamper = new PdfStamper(reader, baos);
stamper.close();
doSomethingWithBytes(baos.toByteArray);
}
In this case, baos.toByteArray() will contain the bytes of a valid PDF file. This wasn't the case in any of your attempts.
PdfReader reader = new PdfReader("source.pdf");
byte byteArray[] = reader.getPageContent(1); // page 1
Also have a look at this link
I'm using iText for stamping a watermark (text: "SuperEasy You Done") on PDF files as described in How to watermark PDFs using text or images? (TransparentWatermark2.java). See project source code on GitHub.
Now an example of the PDF I'm getting is this one (the rest of the document is omitted):
As you can see the watermark is centered and horizontal.
I'd like to keep it centered in the middle of the page, but rotate it "45" degrees, so it rotates anticlockwise. Something like this:
This is the code for stamping the watermark on a given byte array (pdf documents only for me right now)
/**
* Returns the same document with the watermark stamped on it.
* #param documentBytes Byte array of the pdf which is going to be returned with the watermark
* #return byte[] with the same byte array provided but now with the watermark stamped on it.
* #throws IOException If any IO exception occurs while adding the watermark
* #throws DocumentException If any DocumentException exception occurs while adding the watermark
*/
private byte[] getDocumentWithWaterMark(byte[] documentBytes) throws IOException, DocumentException {
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
// pdf
PdfReader reader = new PdfReader(documentBytes);
int n = reader.getNumberOfPages();
PdfStamper stamper = new PdfStamper(reader, outputStream);
// text watermark
Font font = new Font(Font.HELVETICA, 60);
Phrase phrase = new Phrase("SuperEasy You Done", font);
// transparency
PdfGState gs1 = new PdfGState();
gs1.setFillOpacity(0.06f);
// properties
PdfContentByte over;
Rectangle pagesize;
float x, y;
// loop over every page (in case more than one page)
for (int i = 1; i <= n; i++) {
pagesize = reader.getPageSizeWithRotation(i);
x = (pagesize.getLeft() + pagesize.getRight()) / 2;
y = (pagesize.getTop() + pagesize.getBottom()) / 2;
over = stamper.getOverContent(i);
over.saveState();
over.setGState(gs1);
// add text
ColumnText.showTextAligned(over, Element.ALIGN_CENTER, phrase, x, y, 0);
over.restoreState();
}
stamper.close();
reader.close();
return outputStream.toByteArray();
}
PS: I read this, but it didn't help:
http://itext.2136553.n4.nabble.com/rotate-a-watermark-td2155042.html
You just need to specify the desired rotation angle as the 6th parameter in this line:
ColumnText.showTextAligned(over, Element.ALIGN_CENTER, phrase, x, y, 0); // rotate 0 grades in this case
If the specified value is positive ( > 0) the rotation is anticlockwise, otherwise (< 0) the rotation is clockwise.
In this particular case, for rotating the watermark 45 degrees anticlockwise you just need to write the previous line like this:
ColumnText.showTextAligned(over, Element.ALIGN_CENTER, phrase, x, y, 45f); // 45f means rotate the watermark 45 degrees anticlockwise
By applying this same principle we can achieve any rotation in any direction.
The whole documentation is here: https://itextpdf.com/en/resources/api-documentation under the links for version 5 and version 7.
I would like to add a link in my overlay text. I've read that using Anchor will only work for documents made from scratch but not for existing pdfs. My code is adding an overlay text to every page. My goal is to make a portion of that text clickable. I don't know how to make a link annotation that is part of a phrase.
Here's my code:
int n = reader.getNumberOfPages();
// step 4: we add content
PdfImportedPage page;
PdfCopy.PageStamp stamp;
for (int j = 0; j < n; )
{
++j;
page = writer.getImportedPage(reader, j);
if (i == 1) {
stamp = writer.createPageStamp(page);
Rectangle mediabox = reader.getPageSize(j);
Rectangle crop = new Rectangle(mediabox);
writer.setCropBoxSize(crop);
// add overlay text
Paragraph p = new Paragraph();
p.setAlignment(Element.ALIGN_CENTER);
FONT_URL_OVERLAY.setColor(0, 191, 255);
// get current user
EPerson loggedin = context.getCurrentUser();
String eperson = null;
if (loggedin != null)
{
eperson = loggedin.getFullName();
}
else eperson = "Anonymous";
Phrase downloaded = new Phrase();
Chunk site = new Chunk("My Website",FONT_URL_OVERLAY);
site.setAction(new PdfAction("http://www.mywebsite.com"));
downloaded.add(new Chunk("Downloaded by [" + eperson + "] from ", FONT_OVERLAY));
downloaded.add(site);
downloaded.add(new Chunk(" on ", FONT_OVERLAY));
downloaded.add(new Chunk(new SimpleDateFormat("MMMM d, yyyy").format(new Date()), FONT_OVERLAY));
downloaded.add(new Chunk(" at ", FONT_OVERLAY));
downloaded.add(new Chunk(new SimpleDateFormat("h:mm a z").format(new Date()), FONT_OVERLAY));
p.add(downloaded);
ColumnText.showTextAligned(stamp.getOverContent(), Element.ALIGN_CENTER, p,
crop.getLeft(10), crop.getHeight() / 2 + crop.getBottom(), 90);
stamp.alterContents();
}
writer.addPage(page);
}
So my overlay would looked like this:
Downloaded by [Anonymous] from My Website on February 17, 2015 at 1:20 AM CST
How can I convert My Website to a link annotation? Searching here in SO, I found this post, but I don't know how to apply adding link annotation to a portion of my overlay text.
Thanks in advance.
EDIT: How to add a rotated overlay text with link annotations to existing pdf?
Thanks to Bruno Lowagie for going out of his way in answering my question. Although I originally asked how to add link annotations in an overlay text to existing pdfs, he also catered my questions in the comments section of his answer about setting the coordinates properly if the overlay text were rotated.
You are using ColumnText.showAligned() which is sufficient to add a line of text without any special features, but if you want the anchor to work, you need to use ColumnText differently.
This is shown in the AddLinkAnnotation2 example:
public void manipulatePdf(String src, String dest) throws IOException, DocumentException {
PdfReader reader = new PdfReader(src);
PdfStamper stamper = new PdfStamper(reader, new FileOutputStream(dest));
PdfContentByte canvas = stamper.getOverContent(1);
Font bold = new Font(FontFamily.HELVETICA, 12, Font.BOLD);
Chunk chunk = new Chunk("The Best iText Questions on StackOverflow", bold);
chunk.setAnchor("http://pages.itextpdf.com/ebook-stackoverflow-questions.html");
Phrase p = new Phrase("Download ");
p.add(chunk);
p.add(" and discover more than 200 questions and answers.");
ColumnText ct = new ColumnText(canvas);
ct.setSimpleColumn(36, 700, 559, 750);
ct.addText(p);
ct.go();
stamper.close();
reader.close();
}
In this case, we define a rectangle for a ColumnText object, we add the Phrase to the column, and we go().
If you check the result, link_annotation2.pdf, you'll notice that you can click the words in bold.
There are no plans to support this in ColumnText.showTextAligned(). That is a convenience method that can be used as a short-cut for the handful of lines shown above, but there are some known limitations: lines are not wrapped, interactivity is ignored,...
Update 1: in the comment section, you asked an additional question about rotation the content and the link.
Rotating the content isn't difficult. There's even more than one way to do that. Rotating the link isn't trivial, as a link is a type of annotation, and annotations aren't part of the content.
Let's first take a look at AddLinkAnnotation3:
public void manipulatePdf(String src, String dest) throws IOException, DocumentException {
PdfReader reader = new PdfReader(src);
PdfStamper stamper = new PdfStamper(reader, new FileOutputStream(dest));
AffineTransform transform = AffineTransform.getRotateInstance(Math.PI / 6);
stamper.getWriter().setPageEvent(new AddAnnotation(stamper, transform));
PdfContentByte canvas = stamper.getOverContent(1);
Font bold = new Font(FontFamily.HELVETICA, 12, Font.BOLD);
Chunk chunk = new Chunk("The Best iText Questions on StackOverflow", bold);
chunk.setGenericTag("http://pages.itextpdf.com/ebook-stackoverflow-questions.html");
Phrase p = new Phrase("Download ");
p.add(chunk);
p.add(" and discover more than 200 questions and answers.");
canvas.saveState();
canvas.concatCTM(transform);
ColumnText ct = new ColumnText(canvas);
ct.setSimpleColumn(300, 0, 800, 400);
ct.addText(p);
ct.go();
canvas.restoreState();
stamper.close();
reader.close();
}
In this example, we define a tranformation of 30 degrees (Math.PI / 6):
AffineTransform transform = AffineTransform.getRotateInstance(Math.PI / 6);
We use this transformation when rendering the column:
canvas.saveState();
canvas.concatCTM(transform);
// render column
canvas.restoreState();
This rotates the content, but we didn't add any annotation yet. Instead, we define a page event:
stamper.getWriter().setPageEvent(new AddAnnotation(stamper, transform));
and we introduced a generic tag:
chunk.setGenericTag("http://pages.itextpdf.com/ebook-stackoverflow-questions.html");
To add the annotation, we use some magic in the page event implementation:
public class AddAnnotation extends PdfPageEventHelper {
protected PdfStamper stamper;
protected AffineTransform transform;
public AddAnnotation(PdfStamper stamper, AffineTransform transform) {
this.stamper = stamper;
this.transform = transform;
}
#Override
public void onGenericTag(PdfWriter writer, Document document, Rectangle rect, String text) {
float[] pts = {rect.getLeft(), rect.getBottom(), rect.getRight(), rect.getTop()};
transform.transform(pts, 0, pts, 0, 2);
float[] dstPts = {pts[0], pts[1], pts[2], pts[3]};
rect = new Rectangle(dstPts[0], dstPts[1], dstPts[2], dstPts[3]);
PdfAnnotation annot = PdfAnnotation.createLink(writer, rect, PdfAnnotation.HIGHLIGHT_INVERT, new PdfAction(text));
stamper.addAnnotation(annot, 1);
}
}
We create an annotation, but before we do so, we perform a transformation on the rectangle. This makes sure that the text fits the rectangle with the text that needs to be clickable, but... this may not be what you expect:
You may have wanted the rectangle to be rotated, and that's possible, but it's more math. For instance: you could create a polygon that is a better fit: ITextShape Clickable Polygon or path
Fortunately, you don't need an angle of 30 degrees, you want to rotate the text with an angle of 90 degrees. In that case, you don't have the strange effect shown in the above screen shot.
Take a look at AddLinkAnnotation4
public class AddAnnotation extends PdfPageEventHelper {
protected PdfStamper stamper;
protected AffineTransform transform;
public AddAnnotation(PdfStamper stamper, AffineTransform transform) {
this.stamper = stamper;
this.transform = transform;
}
#Override
public void onGenericTag(PdfWriter writer, Document document, Rectangle rect, String text) {
float[] pts = {rect.getLeft(), rect.getBottom(), rect.getRight(), rect.getTop()};
transform.transform(pts, 0, pts, 0, 2);
float[] dstPts = {pts[0], pts[1], pts[2], pts[3]};
rect = new Rectangle(dstPts[0], dstPts[1], dstPts[2], dstPts[3]);
PdfAnnotation annot = PdfAnnotation.createLink(writer, rect, PdfAnnotation.HIGHLIGHT_INVERT, new PdfAction(text));
annot.setBorder(new PdfBorderArray(0, 0, 0));
stamper.addAnnotation(annot, 1);
}
}
As you can see, I've added a single line to remove the border (the border is there by default unless you redefine the PdfBorderArray).
The rest of the code is also almost identical. We now define an angle of Math.PI / 2 (90 degrees).
public void manipulatePdf(String src, String dest) throws IOException, DocumentException {
PdfReader reader = new PdfReader(src);
PdfStamper stamper = new PdfStamper(reader, new FileOutputStream(dest));
AffineTransform transform = AffineTransform.getRotateInstance(Math.PI / 2);
stamper.getWriter().setPageEvent(new AddAnnotation(stamper, transform));
PdfContentByte canvas = stamper.getOverContent(1);
Font bold = new Font(FontFamily.HELVETICA, 12, Font.BOLD);
Chunk chunk = new Chunk("The Best iText Questions on StackOverflow", bold);
chunk.setGenericTag("http://pages.itextpdf.com/ebook-stackoverflow-questions.html");
Phrase p = new Phrase("Download ");
p.add(chunk);
p.add(" and discover more than 200 questions and answers.");
canvas.saveState();
canvas.concatCTM(transform);
ColumnText ct = new ColumnText(canvas);
ct.setSimpleColumn(36, -559, 806, -36);
ct.addText(p);
ct.go();
canvas.restoreState();
stamper.close();
reader.close();
}
Note that the lower left corner of the page is the pivot point, hence we need to adapt the coordinates where we add the column, otherwise you'll rotate all the content outside the visible area of the page.
Update 2:
In yet another comment, you are asking about the coordinates you need to use when adding text in a rotated coordinate system.
I made this drawing:
In the top part, you add the word MIDDLE in the middle of a page, but that's not where it will appear: you are rotating everything by 90 degrees, hence the word MIDDLE will rotate outside your page (into the hatched area). The word will be in the PDF, but you'll never see it.
If you look at my code, you see that I use these coordinates:
ct.setSimpleColumn(36, -559, 806, -36);
This is outside the visible area (it's below the actual page dimensions), but as I rotate everything with 90 degrees, it rotates into the visible area.
If you look at my drawing, you can see that the page with coordinates (0, 0), (0, -595), (842, -598) and (842, 0) rotates by 90 degrees and thus gets the coincides with a page with coordinates (0, 0), (595, 0), (595, 842) and (0, 842). That's the type of Math we all learned in high school ;-)
You were adding text at position crop.getLeft(10), crop.getHeight() / 2 + crop.getBottom(). If you know that the text will be rotated by 90 degrees, you should use crop.getHeight() / 2 + crop.getBottom(), -crop.getLeft().
The best way to understand why, is to make a drawing.
We use xhtml to pdf with good success, but a new requirement came up to have headers and page count on every page. We are using newset release of Flying Saucer.
I followed example here: http://today.java.net/pub/a/today/2007/06/26/generating-pdfs-with-flying-saucer-and-itext.html#page-specific-features
...but this would not work. The header would be top left on first page.
If I use the r7 version, headers and page numbering works perfectly, but none of the passed in html is rendered, whilst in r8 the headers\ page numbers are ignored, but the html is rendered perfectly. xHTML used for tests is copied from url above.
I know I must be missing something very simple, if anyone has any ideas\ comments, I would be very grateful to hear.
I think they changed this functionality in r8.... try this method instead:
https://gist.github.com/626264
We use the same method and everything works perfectly, I have however decided not to use flying-saucer's built in headers/footers and use a PdfStamper to add them after the PDF is generated, it works quite well, here is an example.
public void modifyPdf(PdfStamper stamper) {
this.reader = stamper.getReader();
PdfContentByte under = null;
PdfPTable header = null;
PdfPTable footer = null;
final int total = this.reader.getNumberOfPages();
for (int page = 1; page <= total; page++) {
under = stamper.getUnderContent(page);
final PdfDocument doc = under.getPdfDocument();
final Rectangle rect = this.reader.getPageSizeWithRotation(page);
header = ... //build your header
footer = ... // build your footer
final float x = 0;
//write header to PDF
if (header != null) {
float y = (rect.getTop() - 0);
header.writeSelectedRows(0, -1, x, y, under);
}
//write footer to PDF
if (footer != null) {
float y = (rect.getBottom() + 20);
footer.writeSelectedRows(0, -1, x, y, under);
}
}
}
you can build your stamper like this:
final PdfReader reader = new PdfReader(/*your pdf file*/);
final PdfStamper stamper = new PdfStamper(reader, /* output */);
Hope you find this helpful.