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sklad: import label printing capability from label-tool

This commit is contained in:
Přemysl Eric Janouch 2019-04-14 21:25:21 +02:00
parent 4dade55387
commit ea45784554
Signed by: p
GPG Key ID: A0420B94F92B9493
4 changed files with 91 additions and 51 deletions
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52
label-tool/main.go
View File

@ -4,60 +4,20 @@ import (
"errors"
"html/template"
"image"
"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/imgutil"
"janouch.name/sklad/label"
"janouch.name/sklad/ql"
)
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 := imgutil.Scale{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>
@ -183,12 +143,12 @@ func handle(w http.ResponseWriter, r *http.Request) {
params.Scale = 3
}
var label image.Image
var img image.Image
if mediaInfo != nil {
label = &imgutil.LeftRotate{Image: genLabelForHeight(
params.Text, mediaInfo.PrintAreaPins, params.Scale)}
img = &imgutil.LeftRotate{Image: label.GenLabelForHeight(
font, params.Text, mediaInfo.PrintAreaPins, params.Scale)}
if r.FormValue("print") != "" {
if err := printer.Print(label); err != nil {
if err := printer.Print(img); err != nil {
log.Println("print error:", err)
}
}
@ -206,7 +166,7 @@ func handle(w http.ResponseWriter, r *http.Request) {
}
w.Header().Set("Content-Type", "image/png")
if err := png.Encode(w, label); err != nil {
if err := png.Encode(w, img); err != nil {
http.Error(w, err.Error(), 500)
return
}

21
sklad/db.go
View File

@ -7,6 +7,8 @@ import (
"os"
"strings"
"time"
"janouch.name/sklad/bdf"
)
type Series struct {
@ -46,6 +48,9 @@ type Database struct {
Prefix string // prefix for all container IDs
Series []*Series // all known series
Containers []*Container // all known containers
BDFPath string // path to bitmap font file
BDFScale int // integer scaling for the bitmap font
}
var (
@ -57,6 +62,8 @@ var (
indexSeries = map[string]*Series{}
indexContainer = map[ContainerId]*Container{}
indexChildren = map[ContainerId][]*Container{}
labelFont *bdf.Font
)
// TODO: Some functions to add, remove and change things in the database.
@ -192,6 +199,20 @@ func loadDatabase() error {
}
}
// Prepare label printing.
if db.BDFScale <= 0 {
db.BDFScale = 1
}
if f, err := os.Open(db.BDFPath); err != nil {
return fmt.Errorf("cannot load label font: %s", err)
} else {
defer f.Close()
if labelFont, err = bdf.NewFromBDF(f); err != nil {
return fmt.Errorf("cannot load label font: %s", err)
}
}
// Open database log file for appending.
if dbLog, err = os.OpenFile(dbPath+".log",
os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644); err != nil {

13
sklad/label.tmpl Normal file
View File

@ -0,0 +1,13 @@
{{ define "Title" }}Tisk štítku{{ end }}
{{ define "Content" }}
<h2>Tisk štítku pro {{ .Id }}</h2>
{{ if .UnknownId }}
<p>Neznámý obal.
{{ else if .Error }}
<p>Tisk selhal: {{ .Error }}
{{ else }}
<p>Tisk proběhl úspěšně.
{{ end }}
{{ end }}

56
sklad/main.go
View File

@ -1,6 +1,7 @@
package main
import (
"errors"
"html/template"
"io"
"log"
@ -9,6 +10,10 @@ import (
"os"
"path/filepath"
"time"
"janouch.name/sklad/imgutil"
"janouch.name/sklad/label"
"janouch.name/sklad/ql"
)
var templates = map[string]*template.Template{}
@ -170,18 +175,59 @@ func handleSearch(w http.ResponseWriter, r *http.Request) {
executeTemplate("search.tmpl", w, &params)
}
func printLabel(id string) error {
printer, err := ql.Open()
if err != nil {
return err
}
if printer == nil {
return errors.New("no suitable printer found")
}
defer printer.Close()
printer.StatusNotify = func(status *ql.Status) {
log.Printf("\x1b[1mreceived status\x1b[m\n%+v\n%s",
status[:], status)
}
if err := printer.Initialize(); err != nil {
return err
}
if err := printer.UpdateStatus(); err != nil {
return err
}
mediaInfo := ql.GetMediaInfo(
printer.LastStatus.MediaWidthMM(),
printer.LastStatus.MediaLengthMM(),
)
if mediaInfo == nil {
return errors.New("unknown media")
}
return printer.Print(&imgutil.LeftRotate{Image: label.GenLabelForHeight(
labelFont, id, mediaInfo.PrintAreaPins, db.BDFScale)})
}
func handleLabel(w http.ResponseWriter, r *http.Request) {
if r.Method != http.MethodPost {
w.WriteHeader(http.StatusMethodNotAllowed)
return
}
id := r.FormValue("id")
_ = id
params := struct {
Id string
UnknownId bool
Error error
}{
Id: r.FormValue("id"),
}
// TODO: See if such a container exists, print a label on the printer.
params := struct{}{}
if c := indexContainer[ContainerId(params.Id)]; c == nil {
params.UnknownId = true
} else {
params.Error = printLabel(params.Id)
}
executeTemplate("label.tmpl", w, &params)
}