How to hide the validation icon on signed digital signature fields

Q: Is there a way to turn off digital signature validity when rendering a PDF page in Qoppa’s PDF components and libraries? Our application will perform our own internal signature validation. A: Yes, it is possible by simply making a call to the following static method (before loading the signed PDF): PDFRenderHints.setRenderSignatureVerification(false);PDFRenderHints.setRenderSignatureVerification(false); This method sets […]

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Adding a background or foreground image to a PDF page

Here is a sample Java program showing how to add background and foreground images to pages of a PDF document while still keeping all original page content as vector, i.e, the page still contain text, images and any vector drawing commands. This sample uses Qoppa’s PDF library jPDFProcess. This sample program opens a source PDF, […]

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Add text content to a PDF document with Java

Here is a sample code to add text to a PDF document content using Qoppa’s Java PDF Library, jPDFProcess. import java.awt.Color; import java.awt.Font; import com.qoppa.pdfProcess.PDFDocument; import com.qoppa.pdfProcess.PDFGraphics; import com.qoppa.pdfProcess.PDFPage;   public class AddText { public static void main (String [] args) { try { // load PDF document PDFDocument pdfDoc = new PDFDocument ("C:\\myfolder\\input.pdf", null); […]

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jPDFProcess v2015R2 Build Notes

v2015R2 Download Links v2015R2.10 – October 13 2016 JPDF-853 – Fill and do not stroke text highlight shape v2015R2.09 – August 19 2016 JPDF-839 – Make Root Page Tree Node Kids Array safe to null entry v2015R2.08 – August 11 2016 JPDF-811 – Error encountered trying to merge tag structure information due to ParentTree entry […]

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Creating Searchable PDF from Image Files

Q: Can we convert images files into searchable PDF documents, by performing OCR, using Qoppa’s Java PDF library? A: Yes, using jPDProcess, you can do that. 1. Convert Images to PDF Pages The first step is to create a PDF from the images: // create a new PDF document PDFDocument pdfDoc = new PDFDocument(); // […]

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No Tiff Writer Available Exception when Converting PDF to Tiff

Q: I am using jPDFProcess to convert PDF to TIFF and getting the following exception. How can I resolve this exception? A: You need to add the jai image libraries in the classpath. jai_imageio.jar and jai_codec.jar are jar files that contain Java’s ImageIO image encoders and decoders, needed for reading and writing JPEG 2000 and TIFF files.

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PDF OCR With Multiple Languages

To call OCR with multiple languages, for instance English and French, call: com.qoppa.ocr.TessJNI.performOCR("eng+fra", myPage, 200); com.qoppa.ocr.TessJNI.performOCR("eng+fra", myPage, 200);

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New Languages Supported in OCR

v2015R2 added OCR support for non-Latin and CJK languages. New Latin languages have also been added to the available list of languages. Here is a complete list of newly added OCR languages: New OCR Languages: Afrikaans Albanian – shqip Arabic – العربية Azerbaijani – azərbaycan Basque – euskara Belarusian – беларуская Bengali – বাংলা Bulgarian […]

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LiveCycle Dynamic XFA Forms Support in Qoppa’s PDF Library

LiveCycle XFA forms are complex and uncommon PDF forms that are designed to be rendered dynamically from the drawing and layout information present in the XFA definition. This kind of forms are not widely supported and only a couple of vendors are able to render them. Adobe has moved away from dynamic XFA forms and […]

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What individual libraries are included in jPDFProcess?

Q: I read that jPDFProcess includes the functionality found in many of Qoppa’s individual libraries. What does that mean exactly? A: The following libraries are included in the distribution and licensing of jPDFProcess: jPDFAssemble jPDFFields jPDFImages jPDFPrint jPDFSecure jPDFText These libraries all derive from the main library jPDFProcess and were packaged separately to make it […]

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How to identify blank pages in a PDF programmatically

One way to tell if a page is empty in a PDF document is to look at the number of drawing commands on the page. If there is zero command then the page is perfectly empty, which usually means it was programmatically generated to be blank. But sometimes a page can contain a scanned image […]

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ANT Task to Run PDF Processes

Yes, you can define jPDFProcess functions as ANT tasks, and process PDF documents from your ANT processes or workflows. Following is an implementation of two sample ANT tasks: an ant task to convert a PDF page to an image an task to apply a digital signature to a PDF it is very easy to add […]

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J2EE Server – Servlet to Run PDF Processes

Qoppa’s Java PDF library jPDFProcess can be used directly from a Java Servlet, to process PDF requests. The following sample illustrates this, the servlet loads a PDF document from the file system, adds a watermark to it and then serves the document directly to the client browser: ServletSample.java It would be very easy to add […]

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J2EE Server Rest API to Run PDF Processes

Qoppa’s Java PDF library jPDFProcess can be packaged as a REST API and then deployed to any J2EE server to provide RESTful services. See below. If you are looking for an-easy to install solution, Qoppa Software also offers a Restful API Module as part of Qoppa’s PDF Automation Server that be installed and started by […]

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Command Line to Run PDF Processes

Qoppa’s PDF library jPDFProcess can be used from within a Java command line program, to provide any of its functions through command line options.  By implementing in this way, PDF processing through jPDFProcess can be called from any other application or process to provide PDF functions. To implement the CLI program, a small Java application […]

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Code Sample: Merge 2 PDF files into one in Java using jPDFProcess

This Java program merges two PDF files into a single one using Qoppa’s PDF library jPDFProcess. // Load the two documents PDFDocument pdfDoc1 = new PDFDocument ("input1.pdf", null); PDFDocument pdfDoc2 = new PDFDocument ("input2.pdf", null);   // Append the second document to the first one pdfDoc1.appendDocument(pdfDoc2);   // Save the merged document pdfDoc1.saveDocument ("output.pdf");// Load the […]

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How to add OCR to jPDFProcess

jPDFProcess, Qoppa’s java PDF creation and manipulation library, has an OCR module. Please contact us regarding licensing this additional feature. How to Activate / Implement OCR To get started, you can download: the latest jPDFProcess version from our standard download page: http://www.qoppa.com/pdfprocess/demo/download the JNI native bridge files from here: http://www.qoppa.com/files/pdfprocess/ocr/libtessjni.zip The JNI zip file contains […]

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Linearizing existing PDF documents with Java

Q: Can Qoppa’s Java PDF library, jPDFProcess, create linearized PDF documents and save existing PDF documents as linearized? A: Yes, jPDFProcess can create linearize PDF documents. To linearize a PDF document with jPDFProcess, 2 simple lines of code do the trick: PDFDocument myPDF= new PDFDocument(“file.pdf”); myPDF.saveDocumentLinearized(new FileOutputStream(“linearizedfile.pdf”));PDFDocument myPDF= new PDFDocument(“file.pdf”); myPDF.saveDocumentLinearized(new FileOutputStream(“linearizedfile.pdf”)); What is PDF linearization and why […]

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Saving PDF for Fast Web View Display when streaming

Q: Is there a way to save a PDF optimized for web reading in a way that the the 1st pages of a PDF can be displayed immediately to the user screen while the rest of the PDF continues loading? A: You can use our PDF library jPDFProcess to save PDF documents as “linearized”. Linearized documents contain […]

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PDF overlay and imposition

Q: How can I generate a PDF document from overlaying one PDF document on another? We’re trying to overlay our company’s letterhead onto existing documents. A: Our Java PDF library jPDFProcess can overlay one document on top of another. The function to look at is called appendPageContent and is found at the PDFPage level. Note that the […]

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jPDFProcess Java API

Q: Where can I find jPDFProcess javadoc API? A: You can find the API specification for the latest version of our library jPDFProcess on our website at this link. jPDFProcess is a java library to modify and manipulate PDF documents in Java.

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Code Sample: Print a PDF document in Java using jPDFProcess

A simple Java program that prints a PDF document using Qoppa’s PDF library jPDFProcess. // Load document PDFDocument pdfDoc = new PDFDocument ("input.pdf", null);   // Print the document pdfDoc.print("my printer", null);// Load document PDFDocument pdfDoc = new PDFDocument ("input.pdf", null); // Print the document pdfDoc.print("my printer", null); Download Full Java Sample to Print PDF in […]

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Code Sample: Getting links from a PDF

Links are saved as part of the annotations in a PDF document even though they are not really considered annotations. Links in a PDF document do not specifically have a destination.  Instead, they are more general, they hold a list of actions that can really be anything. We define actions that we support in the com.qoppa.android.pdfViewer.actions […]

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Code Sample: Flatten PDF Interactive Form Fields in Java

This Java program “flattens” field data into the PDF content layer using Qoppa’s PDF library jPDFProcess. This means that the field contents will become part of the PDF content and so the document will not be editable anymore. Click here to view java code. jPDFProcess supports many PDF functions to work with PDF documents within Java. […]

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