diff options
Diffstat (limited to 'label-exp/main.go')
| -rw-r--r-- | label-exp/main.go | 280 |
1 files changed, 0 insertions, 280 deletions
diff --git a/label-exp/main.go b/label-exp/main.go deleted file mode 100644 index dd4f8c2..0000000 --- a/label-exp/main.go +++ /dev/null @@ -1,280 +0,0 @@ -package main - -import ( - "errors" - "html/template" - "image" - "image/color" - "image/draw" - "image/png" - "log" - "net/http" - "os" - "strconv" - - "github.com/boombuler/barcode" - "github.com/boombuler/barcode/qr" - - "janouch.name/sklad/bdf" - "janouch.name/sklad/ql" -) - -// scaler is a scaling image.Image wrapper. -type scaler struct { - image image.Image - scale int -} - -// ColorModel implements image.Image. -func (s *scaler) ColorModel() color.Model { - return s.image.ColorModel() -} - -// Bounds implements image.Image. -func (s *scaler) Bounds() image.Rectangle { - r := s.image.Bounds() - return image.Rect(r.Min.X*s.scale, r.Min.Y*s.scale, - r.Max.X*s.scale, r.Max.Y*s.scale) -} - -// At implements image.Image. -func (s *scaler) At(x, y int) color.Color { - if x < 0 { - x = x - s.scale + 1 - } - if y < 0 { - y = y - s.scale + 1 - } - return s.image.At(x/s.scale, y/s.scale) -} - -// leftRotate is a 90 degree rotating image.Image wrapper. -type leftRotate struct { - image image.Image -} - -// ColorModel implements image.Image. -func (lr *leftRotate) ColorModel() color.Model { - return lr.image.ColorModel() -} - -// Bounds implements image.Image. -func (lr *leftRotate) Bounds() image.Rectangle { - r := lr.image.Bounds() - // Min is inclusive, Max is exclusive. - return image.Rect(r.Min.Y, -(r.Max.X - 1), r.Max.Y, -(r.Min.X - 1)) -} - -// At implements image.Image. -func (lr *leftRotate) At(x, y int) color.Color { - return lr.image.At(-y, x) -} - -// ----------------------------------------------------------------------------- - -var font *bdf.Font - -func genLabelForHeight(text string, height, scale int) image.Image { - // Create a scaled bitmap of the text label. - textRect, _ := font.BoundString(text) - textImg := image.NewRGBA(textRect) - draw.Draw(textImg, textRect, image.White, image.ZP, draw.Src) - font.DrawString(textImg, image.ZP, text) - - scaledTextImg := scaler{image: textImg, scale: scale} - scaledTextRect := scaledTextImg.Bounds() - - remains := height - scaledTextRect.Dy() - 20 - - width := scaledTextRect.Dx() - if remains > width { - width = remains - } - - // Create a scaled bitmap of the QR code. - qrImg, _ := qr.Encode(text, qr.H, qr.Auto) - qrImg, _ = barcode.Scale(qrImg, remains, remains) - qrRect := qrImg.Bounds() - - // Combine. - combinedRect := image.Rect(0, 0, width, height) - combinedImg := image.NewRGBA(combinedRect) - draw.Draw(combinedImg, combinedRect, image.White, image.ZP, draw.Src) - draw.Draw(combinedImg, - combinedRect.Add(image.Point{X: (width - qrRect.Dx()) / 2, Y: 0}), - qrImg, image.ZP, draw.Src) - - target := image.Rect( - (width-scaledTextRect.Dx())/2, qrRect.Dy()+20, - combinedRect.Max.X, combinedRect.Max.Y) - draw.Draw(combinedImg, target, &scaledTextImg, scaledTextRect.Min, draw.Src) - return combinedImg -} - -var tmpl = template.Must(template.New("form").Parse(` - <!DOCTYPE html> - <html><body> - <h1>PT-CBP label printing tool</h1> - <table><tr> - <td valign=top> - <img border=1 src='?img&scale={{.Scale}}&text={{.Text}}'> - </td> - <td valign=top> - <fieldset> - {{ if .Printer }} - - <p>Printer: {{ .Printer.Manufacturer }} {{ .Printer.Model }} - <p>Tape: - {{ if .Printer.LastStatus }} - {{ .Printer.LastStatus.MediaWidthMM }} mm × - {{ .Printer.LastStatus.MediaLengthMM }} mm - - {{ if .MediaInfo }} - (offset: {{ .MediaInfo.SideMarginPins }} pt, - print area: {{ .MediaInfo.PrintAreaPins }} pt) - {{ else }} - (unknown media) - {{ end }} - - {{ if .Printer.LastStatus.Errors }} - {{ range .Printer.LastStatus.Errors }} - <p>Error: {{ . }} - {{ end }} - {{ end }} - - {{ end }} - {{ if .InitErr }} - {{ .InitErr }} - {{ end }} - - {{ else }} - <p>Error: {{ .PrinterErr }} - {{ end }} - </fieldset> - <form><fieldset> - <p><label for=text>Text:</label> - <input id=text name=text value='{{.Text}}'> - <label for=scale>Scale:</label> - <input id=scale name=scale value='{{.Scale}}' size=1> - <p><input type=submit value='Update'> - <input type=submit name=print value='Update and Print'> - </fieldset></form> - </td> - </tr></table> - </body></html> -`)) - -func getPrinter() (*ql.Printer, error) { - printer, err := ql.Open() - if err != nil { - return nil, err - } - if printer == nil { - return nil, errors.New("no suitable printer found") - } - return printer, nil -} - -func getStatus(printer *ql.Printer) error { - if err := printer.Initialize(); err != nil { - return err - } - if err := printer.UpdateStatus(); err != nil { - return err - } - return nil -} - -func handle(w http.ResponseWriter, r *http.Request) { - if err := r.ParseForm(); err != nil { - http.Error(w, err.Error(), 500) - return - } - - var ( - initErr error - mediaInfo *ql.MediaInfo - ) - printer, printerErr := getPrinter() - if printerErr == nil { - defer printer.Close() - printer.StatusNotify = func(status *ql.Status) { - log.Printf("\x1b[1mreceived status\x1b[m\n%s", status) - } - - if initErr = getStatus(printer); initErr == nil { - mediaInfo = ql.GetMediaInfo( - printer.LastStatus.MediaWidthMM(), - printer.LastStatus.MediaLengthMM(), - ) - } - } - - var params = struct { - Printer *ql.Printer - PrinterErr error - InitErr error - MediaInfo *ql.MediaInfo - Text string - Scale int - }{ - Printer: printer, - PrinterErr: printerErr, - InitErr: initErr, - MediaInfo: mediaInfo, - Text: r.FormValue("text"), - } - - var err error - params.Scale, err = strconv.Atoi(r.FormValue("scale")) - if err != nil { - params.Scale = 3 - } - - var label image.Image - if mediaInfo != nil { - label = &leftRotate{image: genLabelForHeight( - params.Text, mediaInfo.PrintAreaPins, params.Scale)} - if r.FormValue("print") != "" { - if err := printer.Print(label); err != nil { - log.Println("print error:", err) - } - } - } - - if _, ok := r.Form["img"]; !ok { - w.Header().Set("Content-Type", "text/html") - tmpl.Execute(w, ¶ms) - return - } - - if mediaInfo == nil { - http.Error(w, "unknown media", 500) - return - } - - w.Header().Set("Content-Type", "image/png") - if err := png.Encode(w, label); err != nil { - http.Error(w, err.Error(), 500) - return - } -} - -func main() { - var err error - fi, err := os.Open("../../ucs-fonts-75dpi100dpi/100dpi/luBS24.bdf") - if err != nil { - log.Fatalln(err) - } - font, err = bdf.NewFromBDF(fi) - if err != nil { - log.Fatalln(err) - } - if err := fi.Close(); err != nil { - log.Fatalln(err) - } - - log.Println("starting server") - http.HandleFunc("/", handle) - log.Fatal(http.ListenAndServe(":8080", nil)) -} |