package main import ( "image" _ "image/gif" _ "image/jpeg" _ "image/png" "flag" "fmt" "log" "os" "janouch.name/sklad/imgutil" "janouch.name/sklad/ql" ) var scale = flag.Int("scale", 1, "integer upscaling") var rotate = flag.Bool("rotate", false, "print sideways") var redblack = flag.Bool("redblack", false, "red and black print") func main() { flag.Usage = func() { fmt.Fprintf(os.Stderr, "Usage: %s IMAGE\n", os.Args[0]) flag.PrintDefaults() } flag.Parse() if flag.NArg() != 1 { flag.Usage() os.Exit(1) } // Open the picture. f, err := os.Open(flag.Arg(0)) if err != nil { log.Fatalln(err) } defer f.Close() // Load and eventually transform the picture. img, _, err := image.Decode(f) if err != nil { log.Fatalln(err) } if *scale > 1 { img = &imgutil.Scale{Image: img, Scale: *scale} } if *rotate { img = &imgutil.LeftRotate{Image: img} } // Open and initialize the printer. p, err := ql.Open() if err != nil { log.Fatalln(err) } if p == nil { log.Fatalln("no suitable printer found") } if err := p.Initialize(); err != nil { log.Fatalln(err) } if err := p.UpdateStatus(); err != nil { log.Fatalln(err) } // Check the picture against the media in the printer. mi := ql.GetMediaInfo( p.LastStatus.MediaWidthMM(), p.LastStatus.MediaLengthMM(), ) if mi == nil { log.Fatalln("unknown media") } bounds := img.Bounds() dx, dy := bounds.Dx(), bounds.Dy() if dx > mi.PrintAreaPins { log.Fatalln("the image is too wide,", dx, ">", mi.PrintAreaPins, "pt") } if dy > mi.PrintAreaLength && mi.PrintAreaLength != 0 { log.Fatalln("the image is too high,", dy, ">", mi.PrintAreaLength, "pt") } if err := p.Print(img, *redblack); err != nil { log.Fatalln(err) } }