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added codabar support

This commit is contained in:
boombuler 2013-12-13 18:43:18 +01:00
parent e5d11acdbf
commit 987cf1bccc
2 changed files with 88 additions and 0 deletions
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36
codabar/codabarcode.go Normal file
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package codabar
import (
"github.com/boombuler/barcode"
"github.com/boombuler/barcode/utils"
"image"
"image/color"
)
type codabarcode struct {
*utils.BitList
content string
}
func (c *codabarcode) Content() string {
return c.content
}
func (c *codabarcode) Metadata() barcode.Metadata {
return barcode.Metadata{"Codabar", 1}
}
func (c *codabarcode) ColorModel() color.Model {
return color.Gray16Model
}
func (c *codabarcode) Bounds() image.Rectangle {
return image.Rect(0, 0, c.Len(), 1)
}
func (c *codabarcode) At(x, y int) color.Color {
if c.GetBit(x) {
return color.Black
}
return color.White
}

52
codabar/encoder.go Normal file
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package codabar
import (
"fmt"
"github.com/boombuler/barcode"
"github.com/boombuler/barcode/utils"
"regexp"
)
var encodingTable map[rune][]bool = map[rune][]bool{
'0': []bool{true, false, true, false, true, false, false, true, true},
'1': []bool{true, false, true, false, true, true, false, false, true},
'2': []bool{true, false, true, false, false, true, false, true, true},
'3': []bool{true, true, false, false, true, false, true, false, true},
'4': []bool{true, false, true, true, false, true, false, false, true},
'5': []bool{true, true, false, true, false, true, false, false, true},
'6': []bool{true, false, false, true, false, true, false, true, true},
'7': []bool{true, false, false, true, false, true, true, false, true},
'8': []bool{true, false, false, true, true, false, true, false, true},
'9': []bool{true, true, false, true, false, false, true, false, true},
'-': []bool{true, false, true, false, false, true, true, false, true},
'$': []bool{true, false, true, true, false, false, true, false, true},
':': []bool{true, true, false, true, false, true, true, false, true, true},
'/': []bool{true, true, false, true, true, false, true, false, true, true},
'.': []bool{true, true, false, true, true, false, true, true, false, true},
'+': []bool{true, false, true, true, false, false, true, true, false, false, true, true},
'A': []bool{true, false, true, true, false, false, true, false, false, true},
'B': []bool{true, false, true, false, false, true, false, false, true, true},
'C': []bool{true, false, false, true, false, false, true, false, true, true},
'D': []bool{true, false, true, false, false, true, true, false, false, true},
}
func Encode(content string) (barcode.Barcode, error) {
checkValid, _ := regexp.Compile(`[ABCD][0123456789\-\$\:/\.\+]*[ABCD]$`)
if content == "!" || checkValid.ReplaceAllString(content, "!") != "!" {
return nil, fmt.Errorf("can not encode \"%s\"", content)
}
resBits := new(utils.BitList)
for i, r := range content {
if i > 0 {
resBits.AddBit(false)
}
bits, ok := encodingTable[r]
if !ok {
return nil, fmt.Errorf("can not encode \"%s\"", content)
}
for _, bit := range bits {
resBits.AddBit(bit)
}
}
return &codabarcode{resBits, content}, nil
}