62 lines
1.4 KiB
Markdown
62 lines
1.4 KiB
Markdown
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# ZPLGFA Golang Package
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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)).
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## install
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1. [install Golang](https://golang.org/doc/install)
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1. `go get simonwaldherr.de/go/zplgfa`
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## example
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```go
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package main
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import (
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"simonwaldherr.de/go/zplgfa"
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"fmt"
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"image"
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_ "image/gif"
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_ "image/jpeg"
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_ "image/png"
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"log"
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"os"
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)
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func main() {
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// open file
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file, err := os.Open("label.png")
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if err != nil {
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log.Printf("Warning: could not open the file: %s\n", err)
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return
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}
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defer file.Close()
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// load image head information
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config, format, err := image.DecodeConfig(file)
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if err != nil {
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log.Printf("Warning: image not compatible, format: %s, config: %v, error: %s\n", format, config, err)
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}
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// reset file pointer to the beginning of the file
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file.Seek(0, 0)
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// load and decode image
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img, _, err := image.Decode(file)
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if err != nil {
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log.Printf("Warning: could not decode the file, %s\n", err)
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return
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}
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// flatten image
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flat := zplgfa.FlattenImage(img)
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// convert image to zpl compatible type
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gfimg := zplgfa.ConvertToZPL(flat, zplgfa.CompressedASCII)
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// output zpl with graphic field date to stdout
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fmt.Println(gfimg)
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}
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```
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