I want to print a DHL label using a label printer.
The DHL label consists of 2 parts: The left half of the image is just info that I can keep to myself. The right part of the PDF is what should actually be printed.
I would therefore like to cut away the left part of the PDF.
I do not want to make it blank, but I really I want to cut if off.
How could I do this?
You essentially want to cut away one half of the PDF page; looking at you screenshot most likely the lower half.
Using iTextSharp 5.5.13.3 you can do that like this:
var testFile = #"new pdf1.pdf";
var resultFile = #"new pdf1-Cut.pdf";
using (PdfReader pdfReader = new PdfReader(testFile))
using (PdfStamper pdfStamper = new PdfStamper(pdfReader, File.Create(resultFile)))
{
for (int i = 1; i <= pdfReader.NumberOfPages; i++)
{
Rectangle cropBox = pdfReader.GetCropBox(i);
PdfArray newCropBox = new PdfArray(new float[] {
cropBox.Left, (cropBox.Bottom + cropBox.Top) / 2,
cropBox.Right, cropBox.Top });
PdfDictionary pageDictionary = pdfReader.GetPageN(i);
pageDictionary.Put(PdfName.CROPBOX, newCropBox);
pageDictionary.Put(PdfName.MEDIABOX, newCropBox);
}
}
(CutPages test CutInHalfForTmighty)
Before
After
Related
Using iText 7.1.9 java edition, I am attempting to add an image to a PDF at a fixed/absolute location, if the PDF is not landscape then I rotate it 90 degrees, however, once the page is rotated the origin point (was bottom left corner) also rotates (now at the top left corner and rotated 90 degrees), so when I insert the image it ends up rotated and uses the wrong origin point. See the two example PDF linked below for a visual of what is happening.
Is there any way to change a page origin point to the bottom left corner after a page is rotated? Is there a better way to rotate a page than using PdfDocument.getPage(p).setRotation?
Should I simply rotate the image and do some math to work out the new location for any additional elements? I have attempted rotating the image using imageData.setRotation(90) but it appears to do nothing.
The following are the inputs using the PDF attached at the bottom of this question:
//String pdfPath = "before_expected.pdf";
//String pdfDest = "after_expected.pdf";
//Or
String pdfPath = "before_unexpected.pdf";
String pdfDest = "after_unexpected.pdf";
The following is my code to rotate pages and add the image:
//Open existing PDF
FileInputStream inputStream = new FileInputStream(pdfPath);
PdfReader reader = new PdfReader(inputStream).setUnethicalReading(true);
//Create new PDF
FileOutputStream outputStream = new FileOutputStream(pdfDest);
PdfWriter writer = new PdfWriter(outputStream);
PdfDocument pdfDocument = new PdfDocument(reader, writer);
//Load sample image
ImageData imageData = ImageDataFactory.create("C:/sample_image.png");
Image image = new Image(imageData);
//Get root element of PDF
Document document = new Document(pdfDocument);
//Get orientation
Rectangle pageSize = pdfDocument.getPage(1).getPageSize();
System.out.println("Original rotation " + pdfDocument.getPage(1).getRotation() + System.lineSeparator() + pageSize.toString());
//Rotate 90 if page is not landscape - placeholder
if (pageSize.getHeight() > pageSize.getWidth())
{
pdfDocument.getPage(1).setRotation(pdfDocument.getPage(1).getRotation() + 90);
}
//Find page size
Rectangle currentPageSize = pdfDocument.getPage(1).getPageSizeWithRotation();
//Locate image 40% across page and 20% up page
float absoluteXpos = currentPageSize.getWidth() * 0.4f;
float absoluteYpos = currentPageSize.getHeight() * 0.2f;
System.out.println("Image location from origin: " + absoluteXpos + ", "+absoluteYpos);
//Add image
image.setFixedPosition(absoluteXpos, absoluteYpos);
document.add(image);
//Removed code to close any tidy up
document.close();
The output from the second PDF (before_unexpected.pdf) shows that it is rotated, but as mentioned above, rotating the page further appears to make no difference for adding additional content:
Original rotation 90
Rectangle: 842.0x1191.0
Image location from origin: 336.80002, 238.2
Here are the PDF files I used for testing:
The first two images show expected/desired behaviour, the last two show how the image is inserted in the wrong spot (based on the incorrect origin/rotation).
Click here for the original file for the first pdf
Click here for the processed file for the first pdf
Click here for the original file for the second pdf
Click here for the processed file for the second pdf
First of all, when determining whether the current page is not landscape (if (pageSize.getHeight() > pageSize.getWidth())) you should already use getPageSizeWithRotation() instead of simply getPageSize(). You use this method later on in the code and you should have used it at an earlier point as well.
Secondly, if you want to add some content to the fixed position independent of the page rotation, you can use the following instruction before adding the content:
pdfDocument.getPage(1).setIgnorePageRotationForContent(true);
The complete code:
//Open existing PDF
FileInputStream inputStream = new FileInputStream("C:/in.pdf");
PdfReader reader = new PdfReader(inputStream).setUnethicalReading(true);
//Create new PDF
FileOutputStream outputStream = new FileOutputStream("C:/Users/Alexey/Desktop/exp.pdf");
PdfWriter writer = new PdfWriter(outputStream);
PdfDocument pdfDocument = new PdfDocument(reader, writer);
//Load sample image
ImageData imageData = ImageDataFactory.create("C:/sample_image.png");
Image image = new Image(imageData);
//Get root element of PDF
pdfDocument.getPage(1).setIgnorePageRotationForContent(true);
Document document = new Document(pdfDocument);
//Get orientation
Rectangle pageSize = pdfDocument.getPage(1).getPageSizeWithRotation();
System.out.println("Original rotation " + pdfDocument.getPage(1).getRotation() + System.lineSeparator() + pageSize.toString());
//Rotate 90 if page is not landscape - placeholder
if (pageSize.getHeight() > pageSize.getWidth())
{
pdfDocument.getPage(1).setRotation(pdfDocument.getPage(1).getRotation() + 90);
}
//Find page size
Rectangle currentPageSize = pdfDocument.getPage(1).getPageSizeWithRotation();
//Locate image 40% across page and 20% up page
float absoluteXpos = currentPageSize.getWidth() * 0.4f;
float absoluteYpos = currentPageSize.getHeight() * 0.2f;
System.out.println("Image location from origin: " + absoluteXpos + ", "+absoluteYpos);
//Add image
image.setFixedPosition(absoluteXpos, absoluteYpos);
document.add(image);
//Removed code to close any tidy up
document.close();
It gives me same result for both input files:
I am trying to add a header to existing pdf documents in Java with iText. I can add the header at a fixed place on the document, but all the documents are different page sizes, so it is not always at the top of the page. I have tried getting the page size so that I could calculate the position of the header, but it seems as if the page size is not actually what I want. On some documents, calling reader.getPageSize(i).getTop(20) will place the text in the right place at the top of the page, however, on some different documents it will place it half way down the page. Most of the pages have been scanned be a Xerox copier, if that makes a difference. Here is the code I am using:
PdfReader reader = new PdfReader(readFilePath);
PdfStamper stamper = new PdfStamper(reader, new FileOutputStream(writeFilePath));
BaseFont bf = BaseFont.createFont(BaseFont.HELVETICA, BaseFont.CP1252, BaseFont.NOT_EMBEDDED);
for (int i = 1; i <= reader.getNumberOfPages(); i++) {
PdfContentByte cb = stamper.getOverContent(i);
cb.beginText();
cb.setFontAndSize(bf, 14);
float x = reader.getPageSize(i).getWidth() / 2;
float y = reader.getPageSize(i).getTop(20);
cb.showTextAligned(PdfContentByte.ALIGN_CENTER, "Copy", x, y, 0);
cb.endText();
}
stamper.close();
PDF that works correctly
PDF that works incorrectly
Take a look at the StampHeader1 example. I adapted your code, introducing ColumnText.showTextAligned() and using a Phrase for the sake of simplicity (maybe you can change that part of your code too):
public void manipulatePdf(String src, String dest) throws IOException, DocumentException {
PdfReader reader = new PdfReader(src);
PdfStamper stamper = new PdfStamper(reader, new FileOutputStream(dest));
Phrase header = new Phrase("Copy", new Font(FontFamily.HELVETICA, 14));
for (int i = 1; i <= reader.getNumberOfPages(); i++) {
float x = reader.getPageSize(i).getWidth() / 2;
float y = reader.getPageSize(i).getTop(20);
ColumnText.showTextAligned(
stamper.getOverContent(i), Element.ALIGN_CENTER,
header, x, y, 0);
}
stamper.close();
reader.close();
}
As you have found out, this code assumes that no rotation was defined.
Now take a look at the StampHeader2 example. I'm using your "Wrong" file and I've added one extra line:
stamper.setRotateContents(false);
By telling the stamper not to rotate the content I'm adding, I'm adding the content using the coordinates as if the page isn't rotated. Please take a look at the result: stamped_header2.pdf. We added "Copy" at the top of the page, but as the page is rotated, we see the word appear on the side. The word is rotated because the page is rotated.
Maybe that's what you want, maybe it isn't. If it isn't, please take a look at StampHeader3 in which I calculate x and y differently, based on the rotation of the page:
if (reader.getPageRotation(i) % 180 == 0) {
x = reader.getPageSize(i).getWidth() / 2;
y = reader.getPageSize(i).getTop(20);
}
else {
x = reader.getPageSize(i).getHeight() / 2;
y = reader.getPageSize(i).getRight(20);
}
Now the word "Copy" appears on what is perceived as the "top of the page" (but in reality, it could be the side of the page): stamped_header3.pdf
I have a pdf which comprises of some data, followed by some whitespace. I don't know how large the data is, but I'd like to trim off the whitespace following the data
PdfReader reader = new PdfReader(PDFLOCATION);
Rectangle rect = new Rectangle(700, 2000);
Document document = new Document(rect);
PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream(SAVELCATION));
document.open();
int n = reader.getNumberOfPages();
PdfImportedPage page;
for (int i = 1; i <= n; i++) {
document.newPage();
page = writer.getImportedPage(reader, i);
Image instance = Image.getInstance(page);
document.add(instance);
}
document.close();
Is there a way to clip/trim the whitespace for each page in the new document?
This PDF contains vector graphics.
I'm usung iTextPDF, but can switch to any Java library (mavenized, Apache license preferred)
As no actual solution has been posted, here some pointers from the accompanying itext-questions mailing list thread:
As you want to merely trim pages, this is not a case of PdfWriter + getImportedPage usage but instead of PdfStamper usage. Your main code using a PdfStamper might look like this:
PdfReader reader = new PdfReader(resourceStream);
PdfStamper stamper = new PdfStamper(reader, new FileOutputStream("target/test-outputs/test-trimmed-stamper.pdf"));
// Go through all pages
int n = reader.getNumberOfPages();
for (int i = 1; i <= n; i++)
{
Rectangle pageSize = reader.getPageSize(i);
Rectangle rect = getOutputPageSize(pageSize, reader, i);
PdfDictionary page = reader.getPageN(i);
page.put(PdfName.CROPBOX, new PdfArray(new float[]{rect.getLeft(), rect.getBottom(), rect.getRight(), rect.getTop()}));
stamper.markUsed(page);
}
stamper.close();
As you see I also added another argument to your getOutputPageSize method to-be. It is the page number. The amount of white space to trim might differ on different pages after all.
If the source document did not contain vector graphics, you could simply use the iText parser package classes. There even already is a TextMarginFinder based on them. In this case the getOutputPageSize method (with the additional page parameter) could look like this:
private Rectangle getOutputPageSize(Rectangle pageSize, PdfReader reader, int page) throws IOException
{
PdfReaderContentParser parser = new PdfReaderContentParser(reader);
TextMarginFinder finder = parser.processContent(page, new TextMarginFinder());
Rectangle result = new Rectangle(finder.getLlx(), finder.getLly(), finder.getUrx(), finder.getUry());
System.out.printf("Text/bitmap boundary: %f,%f to %f, %f\n", finder.getLlx(), finder.getLly(), finder.getUrx(), finder.getUry());
return result;
}
Using this method with your file test.pdf results in:
As you see the code trims according to text (and bitmap image) content on the page.
To find the bounding box respecting vector graphics, too, you essentially have to do the same but you have to extend the parser framework used here to inform its listeners (the TextMarginFinder essentially is a listener to drawing events sent from the parser framework) about vector graphics operations, too. This is non-trivial, especially if you don't know PDF syntax by heart yet.
If your PDFs to trim are not too generic but can be forced to include some text or bitmap graphics in relevant positions, though, you could use the sample code above (probably with minor changes) anyways.
E.g. if your PDFs always start with text on top and end with text at the bottom, you could change getOutputPageSize to create the result rectangle like this:
Rectangle result = new Rectangle(pageSize.getLeft(), finder.getLly(), pageSize.getRight(), finder.getUry());
This only trims top and bottom empty space:
Depending on your input data pool and requirements this might suffice.
Or you can use some other heuristics depending on your knowledge on the input data. If you know something about the positioning of text (e.g. the heading to always be centered and some other text to always start at the left), you can easily extend the TextMarginFinder to take advantage of this knowledge.
Recent (April 2015, iText 5.5.6-SNAPSHOT) improvements
The current development version, 5.5.6-SNAPSHOT, extends the parser package to also include vector graphics parsing. This allows for an extension of iText's original TextMarginFinder class implementing the new ExtRenderListener methods like this:
#Override
public void modifyPath(PathConstructionRenderInfo renderInfo)
{
List<Vector> points = new ArrayList<Vector>();
if (renderInfo.getOperation() == PathConstructionRenderInfo.RECT)
{
float x = renderInfo.getSegmentData().get(0);
float y = renderInfo.getSegmentData().get(1);
float w = renderInfo.getSegmentData().get(2);
float h = renderInfo.getSegmentData().get(3);
points.add(new Vector(x, y, 1));
points.add(new Vector(x+w, y, 1));
points.add(new Vector(x, y+h, 1));
points.add(new Vector(x+w, y+h, 1));
}
else if (renderInfo.getSegmentData() != null)
{
for (int i = 0; i < renderInfo.getSegmentData().size()-1; i+=2)
{
points.add(new Vector(renderInfo.getSegmentData().get(i), renderInfo.getSegmentData().get(i+1), 1));
}
}
for (Vector point: points)
{
point = point.cross(renderInfo.getCtm());
Rectangle2D.Float pointRectangle = new Rectangle2D.Float(point.get(Vector.I1), point.get(Vector.I2), 0, 0);
if (currentPathRectangle == null)
currentPathRectangle = pointRectangle;
else
currentPathRectangle.add(pointRectangle);
}
}
#Override
public Path renderPath(PathPaintingRenderInfo renderInfo)
{
if (renderInfo.getOperation() != PathPaintingRenderInfo.NO_OP)
{
if (textRectangle == null)
textRectangle = currentPathRectangle;
else
textRectangle.add(currentPathRectangle);
}
currentPathRectangle = null;
return null;
}
#Override
public void clipPath(int rule)
{
}
(Full source: MarginFinder.java)
Using this class to trim the white space results in
which is pretty much what one would hope for.
Beware: The implementation above is far from optimal. It is not even correct as it includes all curve control points which is too much. Furthermore it ignores stuff like line width or wedge types. It actually merely is a proof-of-concept.
All test code is in TestTrimPdfPage.java.
I tiied to add a TextBox to the right corner of the existing pdf using c#, but im unable to get it done. I have wrote the following code,but it is not helping in solving the problem, can any body please suggest me
using (MemoryStream stream = new MemoryStream())
{
PdfReader reader = new PdfReader(bytes);
PdfReader.unethicalreading = true;
Paragraph p = new Paragraph();
Document doc = new Document();
using (PdfStamper stamper = new PdfStamper(reader, stream))
{
PdfContentByte canvas = stamper.GetOverContent(1);
iTextSharp.text.Rectangle size = reader.GetPageSizeWithRotation(1);
//PdfContentByte cb = null;
//PdfImportedPage page;
int pages = reader.NumberOfPages;
for (int i = 1; i <= pages; i++)
{
var size1 = reader.GetPageSize(i);
w = size1.Width;
h = size1.Height;
stamper.FormFlattening = true;
TextField tf = new TextField(stamper.Writer, new iTextSharp.text.Rectangle(0, 0, 300, 100), displaytext);
//Change the orientation of the text
tf.Rotation = 0;
stamper.AddAnnotation(tf.GetTextField(), i);
}
}
bytes = stream.ToArray();
}
File.WriteAllBytes(str, bytes);
As the OP clarified in comments to the question, he wants
to add the text as a page content in the right bottom corner of the page and
the page content previously existing there to be removed.
A simple implementation of this would include
first covering the existing page content with a filled rectangle and
then writing text there.
These tasks can be achieved with these helper methods:
void EmptyTextBoxSimple(PdfStamper stamper, int pageNumber, Rectangle boxArea, BaseColor fillColor)
{
PdfContentByte canvas = stamper.GetOverContent(pageNumber);
canvas.SaveState();
canvas.SetColorFill(fillColor);
canvas.Rectangle(boxArea.Left, boxArea.Bottom, boxArea.Width, boxArea.Height);
canvas.Fill();
canvas.RestoreState();
}
and
ColumnText GenerateTextBox(PdfStamper stamper, int pageNumber, Rectangle boxArea)
{
PdfContentByte canvas = stamper.GetOverContent(pageNumber);
ColumnText columnText = new ColumnText(canvas);
columnText.SetSimpleColumn(boxArea);
return columnText;
}
E.g. like this:
using (PdfReader reader = new PdfReader(source))
using (PdfStamper stamper = new PdfStamper(reader, new FileStream(dest, FileMode.Create)))
{
Rectangle cropBox = reader.GetCropBox(1);
Rectangle bottomRight = new Rectangle(cropBox.GetRight(216), cropBox.Bottom, cropBox.Right, cropBox.GetBottom(146));
EmptyTextBoxSimple(stamper, 1, bottomRight, BaseColor.WHITE);
ColumnText columnText = GenerateTextBox(stamper, 1, bottomRight);
columnText.AddText(new Phrase("Some test text to draw into a text box in the lower right corner of the first page"));
columnText.Go();
}
For this source page
the sample code generates this
Addendum
In a comment the OP indicated
it is working for all files but for some pdf files it is displaying in the middle
Eventually he supplied a sample file for which the issue occurs. And indeed, with this file the issue could be reproduced.
The cause for the issue is that the pages in the sample file use page rotation, something that iText (only) partially allows users to ignore. In particular iText automatically rotates text to be upright after rotation and transforms coordinates, but when retrieving the cropbox of a page, one still has to apply rotation before making use of it coordinates. Thus, a more complete example would be like this:
using (PdfReader reader = new PdfReader(source))
using (PdfStamper stamper = new PdfStamper(reader, new FileStream(dest, FileMode.Create)))
{
Rectangle cropBox = reader.GetCropBox(1);
int rotation = reader.GetPageRotation(1);
while (rotation > 0)
{
cropBox = cropBox.Rotate();
rotation -= 90;
}
Rectangle bottomRight = new Rectangle(cropBox.GetRight(216), cropBox.Bottom, cropBox.Right, cropBox.GetBottom(146));
EmptyTextBoxSimple(stamper, 1, bottomRight, BaseColor.WHITE);
ColumnText columnText = GenerateTextBox(stamper, 1, bottomRight);
columnText.AddText(new Phrase("Some test text to draw into a text box in the lower right corner of the first page"));
columnText.Go();
}
I'm lost at the moment.
What I try to accomplish is adding one PDF on another (like a watermark).
The problem is that I dont seems to understand the coordinate system that is used because
my watermark just behaves unexpected.
The two PDFs have different dimensions.
My target has the following dimensions:
595 height
842 width
The PDF that shall be added has this dimension:
41 height
552 width
In my code I do the following:
public bool AddPdf(ref PdfReader pdfSource, ref PdfReader pdfTarget, ref FileStream destination)
{
PdfStamper stamper = null;
try
{
stamper = new PdfStamper( pdfSource, destination );
PdfImportedPage importatedPage = stamper.GetImportedPage(pdfTarget, 1);
PdfContentByte background;
for (int iPage = 1; iPage <= pdfSource.NumberOfPages; iPage++)
{
background = stamper.GetOverContent(iPage);
background.AddTemplate(importatedPage, 0, 0 + importHeight);
}
}
When I do this I would expect my watermark to appear in the bottom left.
Instead it is somewhere of the page (I dont see it). Just for testing I hardcoded 600 as y position and then it is centered vertically on the page.
Can someone give me a tip please?
So i solved the issue.
The problem was that the sourcepdf had a cropbox - i only needed to correct my x and y position with that information:
PdfStamper stamper = null;
try
{
stamper = new PdfStamper(pdfSource, destination);
PdfImportedPage importatedPage = stamper.GetImportedPage(pdfTarget, 1);
PdfContentByte background;
for (int iPage = 1; iPage <= pdfSource.NumberOfPages; iPage++)
{
background = stamper.GetOverContent(iPage);
// here comes the important part
Rectangle cropBox = pdfSource.GetCropBox(iPage);
float xCorrected = 0 + cropBox.Left;
float yCorrected = 0 + cropBox.Bottom;
background.AddTemplate(importatedPage, xCorrected, yCorrected);
}
}
Take in mind that in case the pdf that you want to stamp on your original has also a cropbox, you need to reduce the x,y by x,y of that cropbox again.