Font:getDPIScale
Gets the DPI scale factor of the Font.

The DPI scale factor represents relative pixel density. A DPI scale factor of 2 means the font's glyphs have twice the pixel density in each dimension (4 times as many pixels in the same area) compared to a font with a DPI scale factor of 1.

The font size of TrueType fonts is scaled internally by the font's specified DPI scale factor. By default, LÖVE uses the screen's DPI scale factor when creating TrueType fonts.
dpiscale = Font:getDPIScale()
dpiscale number The DPI scale factor of the Font.