QtPdfium

QtPdfium is a Qt module that renders PDF files using the pdfium project by google. It render PDF pages into QImage.

Installation

To use the library you must first install it in the same location as your Qt installation. Here is an example on Linux/Mac:

git clone --recursive https://github.com/paulovap/qtpdfium
cd qtpdfium
qmake
make
make install (might need sudo)

After that you are ready to use it. Remember to build for each platform you want. (Desktop, Android, iOS…)

Usage

The API consists in only two classes: QPdfium and QPdfiumPage.

To load a PDF file, simply do:

#include <QtPdfium/QPdfium>

QPdfium pdf("mypdf.pdf");
qDebug() << pdf.isValid(); //should return true

You can get the number of pages with QPdfium::pageCount()

You can access pages by index:

#include <QtPdfium/QPdfium>

QPdfium pdf("mypdf.pdf");
QPdfiumPage page =  pdf.page(0);
qDebug() << page.width(); // should show something!

To generate the image:

#include <QtPdfium/QPdfium>

QPdfium pdf("mypdf.pdf");
QPdfiumPage page =  pdf.page(0);
QImage image = page.image(3); //renders it 3 times bigger

And for extracting text:

#include <QtPdfium/QPdfium>

QPdfium pdf("mypdf.pdf");
QPdfiumPage page =  pdf.page(0);
QString pageText = page.text();

Note: On iOS you need to initialize QtPdfium manually since it is statically linked. Just create a global object like this:

#ifdef Q_OS_IOS
    //Since it's static library on IOS we need to initialize it by hand
    PdfiumGlobal global;
#endif

And that’s it.

Future work

• Load pdf with encryption (passwords)
• Text manipulation (find, extract, cursor…)
• Partial rendering
• Render to other devices (gl surface, so on…)

Contributing

Feel free to help. 😃

License

BSD