/**
@mainpage The Poppler Qt4 interface library

The Poppler Qt4 interface library, libpoppler-qt4, is a library that
allows Qt4 programmers to easily load and render PDF files. The
Poppler Qt4 interface library uses poppler internally to do its job,
but the Qt4 programmer will never have to worry about poppler
internals.


@section help Current Status

At the time this document was written (December '05) the Poppler Qt4
interface library was still somewhat experimental. From the two
rendering engines offered by the library, only the splash engine works
well and has been tested.


@section refimpl Example Programs

Examples programs can be found in the qt4/test directory. The poppler
Qt4 interface library is also used in the development version of KDE's
document viewer kviewshell. The source files for kviewshell's PDF
plugin can be found on the subversion server of the KDE project, under
<a
href="http://websvn.kde.org/trunk/KDE/kdegraphics/kviewshell/plugins/pdf">this
URL</a>.


@section req How to use the Poppler Qt4 interface library in three easy steps

Programmer who would like to use the Poppler Qt4 interface library
simply need to add the following two lines to their C++ source files:

@code
#define UNSTABLE_POPPLER_QT4
#include <poppler-qt4.h>
@endcode

The #define statement is required at the moment. You indicate that you
think you know what you are doing, and understand that the API is
subject to change.

A PDF document can then be loaded as follows.
@code
QString filename;

Poppler::Document* document = Poppler::Document::load(filename.ascii());
if (!document || document->isLocked()) {

  ... error message ....

  delete document;
  return;
}
@endcode

Pages can be rendered to QPixmaps with the following commands.

@code
// Paranoid safety check
if (document == 0) {
  ... error message ...
  return;
}

// Access page of the PDF file
Poppler::Page* pdfPage = document->page(pageNumber);  // Document starts at page 0
if (pdfPage == 0) {
  ... error message ...
  return;
}

// Generate a QPixmap of the rendered page
QPixmap* pixmap = pdfPage->splashRenderToPixmap(0, 0, 0, 0, xres, yres );
if (pixmap == 0) {
  ... error message ...
  return;
}

... use pixmap ...

delete pixmap;
@endcode

Finally, don't forget to destroy the document.

@code
delete document;
@endcode
 */