https://github.com/moisam/layla-pdflib

An easy to use Java PDF rendering library
https://github.com/moisam/layla-pdflib

java layla-pdflib pdf pdf-library pdf-viewer

Last synced: 2 months ago
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An easy to use Java PDF rendering library

• Host: GitHub
• URL: https://github.com/moisam/layla-pdflib
• Owner: moisam
• License: lgpl-3.0
• Created: 2017-12-18T08:41:38.000Z (over 7 years ago)
• Default Branch: master
• Last Pushed: 2017-12-29T09:23:51.000Z (over 7 years ago)
• Last Synced: 2025-01-06T20:24:22.546Z (4 months ago)
• Topics: java, layla-pdflib, pdf, pdf-library, pdf-viewer
• Language: Java
• Homepage:
• Size: 1.62 MB
• Stars: 1
• Watchers: 0
• Forks: 3
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# Layla-PDFLib

An easy to use Java PDF rendering library

# Why another PDF library

Because PDF is everywhere, and we often need to show PDF files (or parts of) in our programs. Whether you are writing a Java program for the desktop, Android, or any other platform, you will reach the point where you will sometimes need to show PDF for some reason (e.g. help manual). A lot of Java PDF libraries are available out there, but all of them are difficult to use, and need a lot of time and brain power to understand and use. This library promises to be ridiculously easy to use. A few lines of code and you get a PDF page, ready to show on your program. 

# How to use the library

As promised, the library is very easy to use. See the examples below.

## Getting started

The following code shows how to get the first page of a PDF file. It is pretty straight forward.

        PDFReader pdfReader = new PDFReader();

        // parse the PDF document

        PDFDocument pdfDocument = pdfReader.parse("/path/to/file.pdf");

        if(pdfDocument == null) {

            System.out.println("Failed to open PDF. Error: " + pdfReader.getLastError());

            return;

        }

        // get the page count

        int pageCount = pdfDocument.getPageCount();

        if(pageCount > 0) {

                // load the first page as an image

                BufferedImage page = pdfDocument.getPage(0);

                if(page != null) {

                    // show the image on your JFrame or whatever

                }

        } else {

            System.out.println("Failed to get PDF page count.");

        }

## A more complex example

The file `PDFReaderExample.java` under the `reader` source folder contains a fairly decent PDF viewer that opens a PDF file and shows it one page at a time. The comments in the code should make it easy to follow, and edit, the example.

# Caveats

The library follows PDF standard version 1.7. The following features are not fully implemented yet:

* Type 0 and Type 3 fonts

* The transparent image model

* PostScript (PS) forms

* Crypt filters

* Interactive forms

# License

This library is licensed under GNU Lesser General Public License (LGPL) v3.0. This is because many of you will need to include the PDF library in your proprietary or closed source programs, which is fine by me.