73 lines
2.8 KiB
Markdown
73 lines
2.8 KiB
Markdown
# ZPLGFA Golang Package
|
|
|
|
[](https://godoc.org/github.com/SimonWaldherr/zplgfa)
|
|
[](https://travis-ci.org/SimonWaldherr/zplgfa)
|
|
[](https://coveralls.io/github/SimonWaldherr/zplgfa?branch=master)
|
|
[](https://goreportcard.com/report/github.com/SimonWaldherr/zplgfa)
|
|
[](https://codebeat.co/projects/github-com-simonwaldherr-zplgfa-master)
|
|
[](https://bettercodehub.com/results/SimonWaldherr/zplgfa)
|
|
[](https://app.fossa.io/projects/git%2Bgithub.com%2FSimonWaldherr%2Fzplgfa?ref=badge_shield)
|
|
[](https://raw.githubusercontent.com/SimonWaldherr/zplgfa/master/LICENSE)
|
|
|
|
The ZPLGFA Golang package implements some functions to convert PNG, JPEG and GIF files to ZPL compatible ^GF-elements ([Graphic Fields](https://www.zebra.com/us/en/support-downloads/knowledge-articles/gf-graphic-field-zpl-command.html)).
|
|
|
|
If you need a ready to use application and don't want to hassle around with source code, take a look at the [ZPLGFA CLI Tool](https://github.com/SimonWaldherr/zplgfa/tree/master/cmd/zplgfa) which is based on this package.
|
|
|
|
## install
|
|
|
|
1. [install Golang](https://golang.org/doc/install)
|
|
1. `go get simonwaldherr.de/go/zplgfa`
|
|
|
|
## example
|
|
|
|
```go
|
|
package main
|
|
|
|
import (
|
|
"simonwaldherr.de/go/zplgfa"
|
|
"fmt"
|
|
"image"
|
|
_ "image/gif"
|
|
_ "image/jpeg"
|
|
_ "image/png"
|
|
"log"
|
|
"os"
|
|
)
|
|
|
|
func main() {
|
|
// open file
|
|
file, err := os.Open("label.png")
|
|
if err != nil {
|
|
log.Printf("Warning: could not open the file: %s\n", err)
|
|
return
|
|
}
|
|
|
|
defer file.Close()
|
|
|
|
// load image head information
|
|
config, format, err := image.DecodeConfig(file)
|
|
if err != nil {
|
|
log.Printf("Warning: image not compatible, format: %s, config: %v, error: %s\n", format, config, err)
|
|
}
|
|
|
|
// reset file pointer to the beginning of the file
|
|
file.Seek(0, 0)
|
|
|
|
// load and decode image
|
|
img, _, err := image.Decode(file)
|
|
if err != nil {
|
|
log.Printf("Warning: could not decode the file, %s\n", err)
|
|
return
|
|
}
|
|
|
|
// flatten image
|
|
flat := zplgfa.FlattenImage(img)
|
|
|
|
// convert image to zpl compatible type
|
|
gfimg := zplgfa.ConvertToZPL(flat, zplgfa.CompressedASCII)
|
|
|
|
// output zpl with graphic field date to stdout
|
|
fmt.Println(gfimg)
|
|
}
|
|
|
|
``` |