package main import ( "math" "github.com/fogleman/gg" ) func main() { im1, err := gg.LoadPNG("examples/baboon.png") if err != nil { panic(err) } im2, err := gg.LoadPNG("examples/gopher.png") if err != nil { panic(err) } s1 := im1.Bounds().Size() s2 := im2.Bounds().Size() width := int(math.Max(float64(s1.X), float64(s2.X))) height := s1.Y + s2.Y dc := gg.NewContext(width, height) dc.DrawImage(im1, 0, 0) dc.DrawImage(im2, 0, s1.Y) dc.SavePNG("out.png") }