[poppler] Get text formatting info

[Albert Astals Cid]

El dimarts, 26 de juliol de 2022, a les 14:34:20 (CEST), Martin Delille va 
escriure:
> Hi,
> 
> I have this little piece of code that print the content of a PDF file and
> convert it to a sequence of image:
> 
> bool showPDF(const QString &fileName) {
>         bool result = false;
> 
>         if (auto document = Poppler::Document::load(fileName)) {
>                 if (document->isLocked()) {
>                         qCritical() << "Document is locked:" << fileName <<
> "\n";
>                 } else {
>                         qDebug() << "pages: " << document->numPages() <<
> "\n";
> 
>                         for (int i = 0; i < document->numPages(); i++) {
>                                 qDebug() << "page:" << i << "\n";
>                                 auto page = document->page(i);
> 
>                                 for (auto &text : page->textList()) {
>                                         qDebug() << "\ttext: " <<
> text->boundingBox().x()
>                                                   << " / " <<
> text->boundingBox().y()
>                                                   << " " << text->text()
>                                                   << "\n";
>                                 }
> 
>                                 auto image = page->renderToImage(300, 300);
>                                 image.save(QString("%0.%1.jpg")
>                                            .arg(fileName,
> 
> QString::number(i).rightJustified(3, '0')));
>                                 break;
>                         }
> 
>                         for (auto font : document->fonts()) {
>                                 qDebug() << font.name();
> 
>                         }
>                 }
>         }
> 
>         return result;
> }
> 
> How can I extract text formatting information like boldness and font size ?
> I can’t find the link between text and font items.

As you have discovered that information is not exposed in the Qt frontend.

You can use the cpp frontend 

https://poppler.freedesktop.org/api/cpp/classpoppler_1_1text__box.html

or propose a patch for the Qt frontend to expose that information.

Cheers,
  Albert	

> 
> Martin