Imports github.com/phpdave11/gofpdf golang.org/x/image/font gonum.org/v1/plot/font gonum.org/v1/plot/vg gonum.org/v1/plot/vg/draw gonum.org/v1/plot/vg/fonts Standard library imports bufio bytes fmt image image/color image/png io io/ioutil log math os path/filepath