a number, it is interpreted as the desired point size and returned unchanged.
Otherwise SPEC must be a string consisting of a number and an optional type.
The type may be the strings \"px\", \"pix\", or \"pixel\" (pixels), \"pt\" or
a number, it is interpreted as the desired point size and returned unchanged.
Otherwise SPEC must be a string consisting of a number and an optional type.
The type may be the strings \"px\", \"pix\", or \"pixel\" (pixels), \"pt\" or