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How to add watermark with rotate 45 to pdf (aspose java)

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#1

hi friends,


i have tired to add watermark to pdf but there’re 3 options, on90, on180 and on270. i want to add on45 from left bottom corner to right top corner. is it possible if it how can i.

thanks for all suggest,

Best regards.
#2

Hi,


Thanks for contacting support.

Currently the Rotation enumeration in com.aspose.pdf package does not support 45 degree angle. For the sake of implementation, I have logged this requirement as PDFNEWJAVA-34182 in our issue tracking system. The development team will further look into the details of this requirement and will keep you posted on the status of correction. Please be patient and spare us little time.

However as a workaround, you may try using com.aspose.pdf.facades package. Please try using the following code snippet to accomplish your requirement.

[Java]

//open
document<o:p></o:p>

com.aspose.pdf.facades.PdfFileStamp fileStamp = new com.aspose.pdf.facades.PdfFileStamp();

fileStamp.bindPdf("c:/pdftest/SpecialCharacters_test2.pdf");

//get total number of pages

int totalPages = new com.aspose.pdf.facades.PdfFileInfo("c:/pdftest/SpecialCharacters_test2.pdf").getNumberOfPages();

//create formatted text for page number

com.aspose.pdf.facades.FormattedText formattedText = new com.aspose.pdf.facades.FormattedText("Page # Of " + totalPages, java.awt.Color.BLUE, java.awt.Color.GRAY, com.aspose.pdf.facades.FontStyle.Courier, com.aspose.pdf.facades.EncodingType.Winansi, false, 14);

//set starting number for first page; you might want to start from 2 or more

fileStamp.setStartingNumber(1);

//add page number

// fileStamp.addPageNumber(formattedText, 0);

com.aspose.pdf.facades.Stamp stamp = new com.aspose.pdf.facades.Stamp();

stamp.bindLogo(formattedText);

stamp.setRotation(45f);

fileStamp.addStamp(stamp);

//save updated PDF file

fileStamp.save("c:/pdftest/Stamped_45_Degree.pdf");

fileStamp.close();

#3

hi,


thanks for reply, i tried it and got successfully result. it useful for us.


thanks a lot,

Best regards.
#4

Hi there,


Thanks for your feedback. It is good to know that your issue has been fixed.

In addition to above suggested resolution. Please note to rotate stamp to arbitrary angle you need to use setRotateAngle() method in com.aspose.pdf package as following.

Document pdfDocument
= new Document(myDir

  • “helloworld.pdf”);<o:p></o:p>

//create image stamp

ImageStamp imageStamp = new ImageStamp(myDir + "aspose_pdf.jpg");

imageStamp.setBackground(true);

imageStamp.setXIndent(100);

imageStamp.setYIndent(100);

imageStamp.setHeight(300);

imageStamp.setWidth(300);

//imageStamp.setRotate(Rotation.on270);

imageStamp.setRotateAngle(45);

imageStamp.setOpacity(0.5);

imageStamp.setStampId(421);

//add stamp to particular page

pdfDocument.getPages().get_Item(1).addStamp(imageStamp);

//save output document

pdfDocument.save(myDir + "ImageStamp_output45.pdf");


Please feel free to contact us for any further assistance.


Best Regards,

#5

hi Ahmed,


firstly thanks for suggest, i tried both of them. imageStamp not useful for us because we create watermark dynamically, and apply to all pages. in fact we need some properties both of them,

such as formattedText, setStartingNumber(), background(true), setRotation(), setWidth - Height

thanks for all supports,

Best regards.
#6

Hi,


Thanks for sharing the feedback. We are glad to hear that your requirement can be accomplished while using either of the above stated approaches. Please continue using our API and in the event of any further query, please feel free to contact.
#7

hi nayyer.


can you please provide code for this that does the automatic calculation based on the string given? the code above are hard coded coordinates.

i have successfully done it with text watermark in a vertical position. but my calculations are off when it is diagonal
#8

Hi Chit,


Thanks for your inquriy. You may convert your string to float for the purpose, please check following code snippet. However if there is some difference in your requirement and my understanding then please share some more details along with sample code, we will look into it and will guide you accordingly.

com.aspose.pdf.facades.Stamp stamp = new
com.aspose.pdf.facades.Stamp();<o:p></o:p>

stamp.bindLogo(formattedText);

float f = Float.parseFloat("60");

stamp.setRotation(f);

fileStamp.addStamp(stamp);


Best Regards,
#9

hi tilal. thank you. i sent you email with my code

#10

Hi Chit,


Thanks for your email, but I am afraid the code is incomplete. Please share your sample working code, it will help us to replicate the issue and guide you accordingly.

Best Regards,
#11

Hi Chit,


I am afraid the code is again incomplete. Please share sample code as email attachment instead email body.

We are sorry for the inconvenience.

Best Regards,
#12

Hi Chit,


Thanks for your inquriy. Please note for multiline Text Stamp use addNewLineText property to add new line in FormattedText object instead creating separate stamp for each line, and use Vertical and Horizontal alignment properties of TextStamp to adjust stamp text automatically. Hopefully following code will help you to accomplish the task. However if there is difference in your requirement and my understanding then please share some more details, so we will guide you accordingly.

ArrayList watermark = new ArrayList<>();<o:p></o:p>

watermark.add("Test Line 1");

watermark.add("Test Line 2");

watermark.add("Test Line 3");

Document pdfDocument = new Document();

pdfDocument.getPages().add();

ArrayList textStamps = new ArrayList<>();

// arrange muliline text stamp text

FormattedText ft = new FormattedText(watermark.get(0), java.awt.Color.LIGHT_GRAY,

"Helvetica", EncodingType.Winansi, false, 80);

for (int i=1; i<watermark.size(); i++) {

ft.addNewLineText(watermark.get(i));

}

TextStamp stamp = new TextStamp(ft);

stamp.setBackground(true);

stamp.setOpacity(0.5);

stamp.setRotateAngle(-45);

stamp.setTextAlignment(VerticalAlignment.Center);

stamp.setHorizontalAlignment(HorizontalAlignment.Center);

stamp.setVerticalAlignment(VerticalAlignment.Center);

// add stamp to page collection

pdfDocument.getPages().get_Item(1).addStamp(stamp);

pdfDocument.save("test.pdf");


Best Regards,
#13

hi tilal. thank you for the code. it works


however, text is selectable. how to do this?

in my previous code, i called stamp.setDraw(true). however, only the last text gets shown in the page.
#14

Hi Chit,


Thanks for the additional information. I have tested the scenario and noticed that setDraw property hides some contents of text stamp, so logged a ticket PDFJAVA-36390 in our issue tracking system for further investigation and rectification.

We are sorry for the inconvenience.

Best Regards,