Adds label to an image

main.go

package main

import (
	"image"
	"image/color"
	"image/png"
	"os"

	"golang.org/x/image/font"
	"golang.org/x/image/font/basicfont"
	"golang.org/x/image/math/fixed"
)

func main() {
	img := image.NewRGBA(image.Rect(0, 0, 320, 240))

	x, y := 100, 100

	point := fixed.Point26_6{fixed.Int26_6(x * 64), fixed.Int26_6(y * 64)}

	d := &font.Drawer{
		Dst:  img,
		Src:  image.NewUniform(color.Black),
		Face: basicfont.Face7x13,
		Dot:  point,
	}

	d.DrawString("Test 123")

	png.Encode(os.Stdout, img)
}

Face7x13 is a fixed font, how to increase the font size?