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ql-print: add a simple printing tool

master
Přemysl Janouch 1 year ago
parent
commit
10380a7901
Signed by: Přemysl Janouch <p@janouch.name> GPG Key ID: A0420B94F92B9493
1 changed files with 88 additions and 0 deletions
  1. +88
    -0
      ql-print/main.go

+ 88
- 0
ql-print/main.go View File

@@ -0,0 +1,88 @@
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")

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); err != nil {
log.Fatalln(err)
}
}

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