The qt driver uses the the Qt library (either Qt4 or Qt5) to produce plots in the PDF, EPS (Encapsulated PostScript), PNG, JPEG, TIFF, SVG, BMP, and PPM file formats. Text and graphics are antialised, font selection is done automatically for any given unicode glyph requested using the recommended fontconfig approach, and complex text layout is used to render text. As a result this driver is considered to be one of our two best (our cairo driver described in the section called “The cairo driver” is the other) file device drivers.