How to check whether a font is the requested font

Jessica SnapGene

I'm working on a project where we check whether a specific font is installed when running on Linux. We recently upgraded our Qt version from 5.9.6 to 5.15.1. With 5.9.6 we did:

bool isFontInstalled() 
{
  return QFont("Verdana").exactMatch();
}

Now, with 5.15.1, this returns false even when Verdana is installed. I've tried:

bool isFontInstalled() 
{
  QFontDatabase db;
  auto fontFromDB = db.font( "Verdana", "", 12 );
  return fontFromDB.exactMatch();
}

But this also returns false. I've checked a few other font families, QFont::exactMatch() always returns false. Is this a bug? Or is there some way to construct a font that will be considered an "exact match" for Verdana?

Christian Ehrlicher

@Jessica-SnapGene said in How to check whether a font is the requested font:

Is this a bug?

Maybe, search the bugtracker and create one if you think it's a bug. Don't forget a simple reproducable example in the bugreport.

Jessica SnapGene

I logged this: https://bugreports.qt.io/browse/QTBUG-87267

Looks like it was a bug. I haven't confirmed whether or not it has been fixed, but there's a commit to 5.15 branch. I'll mark this topic solved.