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add examples and test cases

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This commit is contained in:
Simon Waldherr
2018-10-19 20:51:21 +02:00
parent ac541f60b5
commit 4cf804ae09
4 changed files with 34 additions and 9 deletions
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10
README.md
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@@ -1,10 +1,10 @@
# ZPLGFA Golang Package # ZPLGFA Golang Package
[![GoDoc](https://godoc.org/github.com/SimonWaldherr/zplgfa?status.svg)](https://godoc.org/github.com/SimonWaldherr/zplgfa) [![GoDoc](https://godoc.org/github.com/SimonWaldherr/zplgfa?status.svg)](https://godoc.org/github.com/SimonWaldherr/zplgfa)
[![Go Report Card](https://goreportcard.com/badge/github.com/SimonWaldherr/zplgfa)](https://goreportcard.com/report/github.com/SimonWaldherr/zplgfa) [![Go Report Card](https://goreportcard.com/badge/github.com/SimonWaldherr/zplgfa)](https://goreportcard.com/report/github.com/SimonWaldherr/zplgfa)
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[![BCH compliance](https://bettercodehub.com/edge/badge/SimonWaldherr/zplgfa?branch=master)](https://bettercodehub.com/results/SimonWaldherr/zplgfa) [![BCH compliance](https://bettercodehub.com/edge/badge/SimonWaldherr/zplgfa?branch=master)](https://bettercodehub.com/results/SimonWaldherr/zplgfa)
[![license](https://img.shields.io/badge/license-MIT-blue.svg)](https://raw.githubusercontent.com/SimonWaldherr/zplgfa/master/LICENSE) [![license](https://img.shields.io/badge/license-MIT-blue.svg)](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)). 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)).

13
example_test.go Normal file
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@@ -0,0 +1,13 @@
package zplgfa_test
import (
"fmt"
"simonwaldherr.de/go/zplgfa"
)
func ExampleCompressASCII() {
str := zplgfa.CompressASCII("FFFFFFFF000000")
fmt.Print(str)
// Output: NFL0
}

9
zplgfa.go
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@@ -87,7 +87,8 @@ func getRepeatCode(repeatCount int, char string) string {
return repeatStr return repeatStr
} }
func compressASCII(in string) string { // CompressASCII compresses the ASCII data of a ZPL Graphic Field using RLE
func CompressASCII(in string) string {
in = strings.ToUpper(in) in = strings.ToUpper(in)
var curChar string var curChar string
var lastChar string var lastChar string
@@ -112,7 +113,7 @@ func compressASCII(in string) string {
curChar = string(in[i]) curChar = string(in[i])
} }
if lastChar != curChar { if lastChar != curChar {
if i-lastCharSince > 8 { if i-lastCharSince > 4 {
repCode = getRepeatCode(i-lastCharSince, lastChar) repCode = getRepeatCode(i-lastCharSince, lastChar)
output += repCode output += repCode
} else { } else {
@@ -175,7 +176,7 @@ func ConvertToGraphicField(source image.Image, graphicType GraphicType) string {
case ASCII: case ASCII:
GraphicFieldData += fmt.Sprintln(hexstr) GraphicFieldData += fmt.Sprintln(hexstr)
case CompressedASCII: case CompressedASCII:
curLine := compressASCII(hexstr) curLine := CompressASCII(hexstr)
if lastLine == curLine { if lastLine == curLine {
GraphicFieldData += ":" GraphicFieldData += ":"
} else { } else {
@@ -186,7 +187,7 @@ func ConvertToGraphicField(source image.Image, graphicType GraphicType) string {
GraphicFieldData += fmt.Sprintf("%s", line) GraphicFieldData += fmt.Sprintf("%s", line)
default: default:
graphicType = CompressedASCII graphicType = CompressedASCII
GraphicFieldData += fmt.Sprintln(compressASCII(hexstr)) GraphicFieldData += fmt.Sprintln(CompressASCII(hexstr))
} }
} }

11
zplgfa_test.go Normal file
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@@ -0,0 +1,11 @@
package zplgfa
import (
"testing"
)
func Test_CompressASCII(t *testing.T) {
if str := CompressASCII("FFFFFFFF000000"); str != "NFL0" {
t.Fatalf("CompressASCII failed")
}
}