func LoadDemo(ctx *nanovgo.Context) *demo.DemoData { d := &demo.DemoData{} for i := 0; i < 12; i++ { path := fmt.Sprintf("images/image%d.jpg", i+1) d.Images = append(d.Images, ctx.CreateImage(path, 0)) if d.Images[i] == 0 { log.Fatalf("Could not load %s", path) } } d.FontIcons = ctx.CreateFont("icons", "entypo.ttf") if d.FontIcons == -1 { log.Fatalln("Could not add font icons.") } d.FontNormal = ctx.CreateFont("sans", "Roboto-Regular.ttf") if d.FontNormal == -1 { log.Fatalln("Could not add font italic.") } d.FontBold = ctx.CreateFont("sans-bold", "Roboto-Bold.ttf") if d.FontBold == -1 { log.Fatalln("Could not add font bold.") } return d }