cheetah
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go-snake-label
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cheetah 2 weeks ago
commit d1a64da3e9
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5
go.mod
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module git.cheetah.cat/cheetah/go-snake-label
go 1.22.5
require gopkg.in/gographics/imagick.v2 v2.7.0

2
go.sum
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gopkg.in/gographics/imagick.v2 v2.7.0 h1:Acluvnk5MhtETFX4EVnt9NbjC32ROaaC3bx6nJueHJk=
gopkg.in/gographics/imagick.v2 v2.7.0/go.mod h1:/QVPLV/iKdNttRKthmDkeeGg+vdHurVEPc8zkU0XgBk=

52
lib/common.go
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package lib
import "gopkg.in/gographics/imagick.v2/imagick"
func ConvertPDF2PNG(pdfFile, pngFile string, dpi int, rot int) (err error) {
mw := imagick.NewMagickWand()
defer mw.Destroy()
err = mw.SetResolution(float64(dpi), float64(dpi))
if err != nil {
return err
}
err = mw.ReadImage(pdfFile)
if err != nil {
return err
}
if mw.GetNumberImages() > 1 {
mw = mw.MergeImageLayers(imagick.IMAGE_LAYER_FLATTEN)
}
drawingWand := imagick.NewDrawingWand()
defer drawingWand.Destroy()
pixelWand := imagick.NewPixelWand()
defer pixelWand.Destroy()
pixelWand.SetColor("white")
drawingWand.SetFillColor(pixelWand)
err = mw.RotateImage(pixelWand, float64(rot))
if err != nil {
return err
}
//mw.SetIteratorIndex(0)
err = mw.SetImageAlphaChannel(imagick.ALPHA_CHANNEL_DEACTIVATE)
if err != nil {
return err
}
err = mw.SetImageFormat("png")
if err != nil {
return err
}
err = mw.WriteImage(pngFile)
if err != nil {
return err
}
//
return nil
}

301
lib/dhl.go
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package lib
import (
"fmt"
"gopkg.in/gographics/imagick.v2/imagick"
)
func DHLPrivat(inputFile, outputFile string) (err error) {
canvasWidth := uint(1642)
canvasHeight := uint(696)
//
srcWand := imagick.NewMagickWand()
defer srcWand.Destroy()
if err = srcWand.ReadImage(inputFile); err != nil {
return err
}
var (
barcodeSizeX int = 710
barcodeSizeY int = 320
scSize int = 296
)
sections := []struct {
srcX, srcY, srcW, srcH,
tgtX, tgtY, tgtW, tgtH,
rot int
}{
{ // Kopf
1964, 106, 1124, 94,
0, 0, 890, 74,
0,
},
{ // Adresse
1964, 210, 785, 625,
0, 95, 580, 465,
0,
},
{ // Sicherheitscode
2763, 215, scSize, scSize,
594, 90, scSize, scSize,
0,
},
{ // Sicherheitscode Text
3075, 244, 20, 194,
645, 395, 200, 20,
270,
},
{ // Bahntransport
2802, 679, 234, 154,
666, 465, 152, 100,
0,
},
{ //Sendungsdaten
1964, 933, 1124, 152,
0, 576, 890, 120,
0,
},
{ // Leitcode/Routingcode
2181, 1526, barcodeSizeX, barcodeSizeY,
930, 20, barcodeSizeX, barcodeSizeY,
0,
},
{ // Identcode/Sendungsnummer
2181, 1940, barcodeSizeX, barcodeSizeY,
930, 376, barcodeSizeX, barcodeSizeY,
0,
},
}
outputWand := imagick.NewMagickWand()
defer outputWand.Destroy()
drawingWand := imagick.NewDrawingWand()
defer drawingWand.Destroy()
pixelWand := imagick.NewPixelWand()
defer pixelWand.Destroy()
// Set canvas size for the output image
pixelWand.SetColor("white")
drawingWand.SetFillColor(pixelWand)
err = outputWand.NewImage(canvasWidth, canvasHeight, pixelWand)
if err != nil {
return err
}
for i, section := range sections {
cropped := srcWand.Clone()
defer cropped.Destroy()
if err := cropped.CropImage(uint(section.srcW), uint(section.srcH), int(section.srcX), int(section.srcY)); err != nil {
return fmt.Errorf("failed to crop section %d: %v", i, err)
}
if section.rot != 0 {
err = cropped.RotateImage(pixelWand, float64(section.rot))
if err != nil {
return fmt.Errorf("failed to rotate section %d: %v", i, err)
}
}
// Resize cropped section (if needed)
if err := cropped.ResizeImage(uint(section.tgtW), uint(section.tgtH), imagick.FILTER_LANCZOS, 1); err != nil {
return fmt.Errorf("failed to resize section %d: %v", i, err)
}
//cropped.WriteImage(fmt.Sprintf("section%d.png", i))
// Composite the cropped section onto the output canvas
if err := outputWand.CompositeImage(cropped, imagick.COMPOSITE_OP_COPY, int(section.tgtX), int(section.tgtY)); err != nil {
return fmt.Errorf("failed to composite section %d: %v", i, err)
}
}
{ // Line
strokeWand := imagick.NewPixelWand()
defer strokeWand.Destroy()
strokeWand.SetColor("black")
lineWand := imagick.NewDrawingWand()
defer lineWand.Destroy()
lineWand.SetStrokeColor(strokeWand)
lineWand.Line(910, 0, 910, float64(canvasHeight))
err = outputWand.DrawImage(lineWand)
if err != nil {
return err
}
}
err = outputWand.SetImageFormat("png")
if err != nil {
return err
}
err = outputWand.WriteImage(outputFile)
if err != nil {
return err
}
//
return nil
}
func DHLPrivatInternational(inputFile, outputFile string) (err error) {
canvasWidth := uint(2232)
canvasHeight := uint(696)
//
srcWand := imagick.NewMagickWand()
defer srcWand.Destroy()
if err = srcWand.ReadImage(inputFile); err != nil {
return err
}
var (
barcodeSizeX int = 1124
barcodeSizeY int = 280
scSize int = 296
)
sections := []struct {
srcX, srcY, srcW, srcH,
tgtX, tgtY, tgtW, tgtH,
rot int
}{
{ // Kopf
1964, 106, 1124, 94,
0, 0, 890, 74,
0,
},
{ // Adresse
1964, 210, 785, 625,
0, 95, 580, 465,
0,
},
{ // Sicherheitscode
2763, 215, scSize, scSize,
594, 90, scSize, scSize,
0,
},
{ // Sicherheitscode Text
3075, 244, 20, 194,
645, 395, 200, 20,
270,
},
{ // Telefonnummer & E-Mail
2768, 743, 300, 60,
590, 495, 300, 60,
0,
},
{ //Sendungsdaten
1964, 933, 1124, 152,
0, 576, 890, 120,
0,
},
{ // Icons / Go Green
1964, 854, 1124, 70,
920, 696, 696, 43,
270,
},
{ // Tracked
1964, 1197, 1124, 122,
986, 696, 696, 76,
270,
},
{ // Tracked Icon
2846, 530, 130, 202,
930, 10, 130, 202,
0,
},
{ // Unzustellbarkeit
1964, 1422, barcodeSizeX, 70,
1100, 4, barcodeSizeX, 70,
0,
},
{ // Leitcode/Routingcode
1964, 1634, barcodeSizeX, barcodeSizeY,
1100, 100, barcodeSizeX, barcodeSizeY,
0,
},
{ // Category Letter
1964, 2000, 160, barcodeSizeY - 20,
1100, 416, 160, barcodeSizeY - 20,
0,
},
{ // Identcode/Sendungsnummer
1964, 2048 + 260, 160, 20,
1100, 416 + 260, 160, 20,
0,
},
{ // Identcode/Sendungsnummer (2)
1964 + 160, 2048, barcodeSizeX - 160, barcodeSizeY,
1100 + 160, 416, barcodeSizeX - 160, barcodeSizeY,
0,
},
}
outputWand := imagick.NewMagickWand()
defer outputWand.Destroy()
drawingWand := imagick.NewDrawingWand()
defer drawingWand.Destroy()
pixelWand := imagick.NewPixelWand()
defer pixelWand.Destroy()
// Set canvas size for the output image
pixelWand.SetColor("white")
drawingWand.SetFillColor(pixelWand)
err = outputWand.NewImage(canvasWidth, canvasHeight, pixelWand)
if err != nil {
return err
}
for i, section := range sections {
cropped := srcWand.Clone()
defer cropped.Destroy()
if err := cropped.CropImage(uint(section.srcW), uint(section.srcH), int(section.srcX), int(section.srcY)); err != nil {
return fmt.Errorf("failed to crop section %d: %v", i, err)
}
if section.rot != 0 {
err = cropped.RotateImage(pixelWand, float64(section.rot))
if err != nil {
return fmt.Errorf("failed to rotate section %d: %v", i, err)
}
}
// Resize cropped section (if needed)
if err := cropped.ResizeImage(uint(section.tgtW), uint(section.tgtH), imagick.FILTER_LANCZOS, 1); err != nil {
return fmt.Errorf("failed to resize section %d: %v", i, err)
}
// Composite the cropped section onto the output canvas
if err := outputWand.CompositeImage(cropped, imagick.COMPOSITE_OP_COPY, int(section.tgtX), int(section.tgtY)); err != nil {
return fmt.Errorf("failed to composite section %d: %v", i, err)
}
}
{ // Line 1
strokeWand := imagick.NewPixelWand()
defer strokeWand.Destroy()
strokeWand.SetColor("black")
lineWand := imagick.NewDrawingWand()
defer lineWand.Destroy()
lineWand.SetStrokeColor(strokeWand)
lineWand.Line(910, 0, 910, float64(canvasHeight))
lineWand.Line(920, 230, 1070, 230)
lineWand.Line(970, 240, 970, float64(canvasHeight))
lineWand.Line(1080, 0, 1080, float64(canvasHeight))
err = outputWand.DrawImage(lineWand)
if err != nil {
return err
}
}
err = outputWand.SetImageFormat("png")
if err != nil {
return err
}
err = outputWand.WriteImage(outputFile)
if err != nil {
return err
}
//
return nil
}

74
main.go
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package main
import (
"encoding/binary"
"encoding/hex"
"flag"
"fmt"
"math/rand"
"os"
"path"
"time"
"git.cheetah.cat/cheetah/go-snake-label/lib"
"gopkg.in/gographics/imagick.v2/imagick"
)
var src = rand.New(rand.NewSource(time.Now().UnixNano()))
func RandStringBytesMaskImprSrc(n int) string {
b := make([]byte, (n+1)/2)
if _, err := src.Read(b); err != nil {
panic(err)
}
return hex.EncodeToString(b)[:n]
}
func tempPNGPath() string {
return path.Join(os.TempDir(), fmt.Sprintf(RandStringBytesMaskImprSrc(16), ".png"))
}
// sudo apt-get install libmagickwand-dev
func main() {
imagick.Initialize()
defer imagick.Terminate()
inputFile := flag.String("input", "", "input filename")
outputFile := flag.String("output", "", "output filename")
modeSelect := flag.String("mode", "dhlprivat", "mode select (dhlprivat, dhlprivatint)")
flag.Parse()
if len(*inputFile) < 3 {
panic("invalid input file")
}
if len(*outputFile) == 0 {
panic("invalid output file")
}
tempFileName := tempPNGPath()
defer os.Remove(tempFileName)
outputFileName := *outputFile
outputSTDOUT := false
if outputFileName == "-" || outputFileName == "/dev/stdout" {
outputSTDOUT = true
outputFileName = tempPNGPath()
defer os.Remove(outputFileName)
}
switch *modeSelect {
case "dhlprivat":
// scale: 4, // optional, defaults to 4 (288dpi) -- 4.1666 for 300dpi
lib.ConvertPDF2PNG(*inputFile, tempFileName, 288, 90)
lib.DHLPrivat(tempFileName, outputFileName)
case "dhlprivatint":
lib.ConvertPDF2PNG(*inputFile, tempFileName, 288, 90)
lib.DHLPrivatInternational(tempFileName, outputFileName)
}
if outputSTDOUT {
outputBytes, _ := os.ReadFile(outputFileName)
binary.Write(os.Stdout, binary.LittleEndian, outputBytes)
}
}
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