Merge pull request #84 from zhaori96/allow-other-depths

Allow other color schemes and models for barcodes.

aztec/azteccode.go

@@ -13,10 +13,11 @@ type aztecCode struct {
 	*utils.BitList
 	size    int
 	content []byte
+	color   barcode.ColorScheme
 }
 
-func newAztecCode(size int) *aztecCode {
+func newAztecCode(size int, color barcode.ColorScheme) *aztecCode {
-	return &aztecCode{utils.NewBitList(size * size), size, nil}
+	return &aztecCode{utils.NewBitList(size * size), size, nil, barcode.ColorScheme16}
 }
 
 func (c *aztecCode) Content() string {
@@ -28,7 +29,11 @@ func (c *aztecCode) Metadata() barcode.Metadata {
 }
 
 func (c *aztecCode) ColorModel() color.Model {
-	return color.Gray16Model
+	return c.color.Model
+}
+
+func (c *aztecCode) ColorScheme() barcode.ColorScheme {
+	return c.color
 }
 
 func (c *aztecCode) Bounds() image.Rectangle {
@@ -37,9 +42,9 @@ func (c *aztecCode) Bounds() image.Rectangle {
 
 func (c *aztecCode) At(x, y int) color.Color {
 	if c.GetBit(x*c.size + y) {
-		return color.Black
+		return c.color.Foreground
 	}
-	return color.White
+	return c.color.Background
 }
 
 func (c *aztecCode) set(x, y int) {

aztec/encoder.go

@@ -124,6 +124,11 @@ func drawBullsEye(matrix *aztecCode, center, size int) {
 
 // Encode returns an aztec barcode with the given content
 func Encode(data []byte, minECCPercent int, userSpecifiedLayers int) (barcode.Barcode, error) {
+	return EncodeWithColor(data, minECCPercent, userSpecifiedLayers, barcode.ColorScheme16)
+}
+
+// Encode returns an aztec barcode with the given content and color scheme
+func EncodeWithColor(data []byte, minECCPercent int, userSpecifiedLayers int, color barcode.ColorScheme) (barcode.Barcode, error) {
 	bits := highlevelEncode(data)
 	eccBits := ((bits.Len() * minECCPercent) / 100) + 11
 	totalSizeBits := bits.Len() + eccBits
@@ -215,7 +220,7 @@ func Encode(data []byte, minECCPercent int, userSpecifiedLayers int) (barcode.Ba
 			alignmentMap[origCenter+i] = center + newOffset + 1
 		}
 	}
-	code := newAztecCode(matrixSize)
+	code := newAztecCode(matrixSize, color)
 	code.content = data
 
 	// draw data bits

barcode.go

@@ -1,6 +1,8 @@
 package barcode
 
-import "image"
+import (
+	"image"
+)
 
 const (
 	TypeAztec           = "Aztec"
@@ -40,3 +42,7 @@ type BarcodeIntCS interface {
 	Barcode
 	CheckSum() int
 }
+
+type BarcodeColor interface {
+	ColorScheme() ColorScheme
+}

codabar/encoder.go

@@ -32,8 +32,8 @@ var encodingTable = map[rune][]bool{
 	'D': []bool{true, false, true, false, false, true, true, false, false, true},
 }
 
-// Encode creates a codabar barcode for the given content
+// Encode creates a codabar barcode for the given content and color scheme
-func Encode(content string) (barcode.Barcode, error) {
+func EncodeWithColor(content string, color barcode.ColorScheme) (barcode.Barcode, error) {
 	checkValid, _ := regexp.Compile(`[ABCD][0123456789\-\$\:/\.\+]*[ABCD]$`)
 	if content == "!" || checkValid.ReplaceAllString(content, "!") != "!" {
 		return nil, fmt.Errorf("can not encode \"%s\"", content)
@@ -45,5 +45,10 @@ func Encode(content string) (barcode.Barcode, error) {
 		}
 		resBits.AddBit(encodingTable[r]...)
 	}
-	return utils.New1DCode(barcode.TypeCodabar, content, resBits), nil
+	return utils.New1DCodeWithColor(barcode.TypeCodabar, content, resBits, color), nil
+}
+
+// Encode creates a codabar barcode for the given content
+func Encode(content string) (barcode.Barcode, error) {
+	return EncodeWithColor(content, barcode.ColorScheme16)
 }

code128/encode.go

@@ -155,8 +155,8 @@ func getCodeIndexList(content []rune) *utils.BitList {
 	return result
 }
 
-// Encode creates a Code 128 barcode for the given content
+// Encode creates a Code 128 barcode for the given content and color scheme
-func Encode(content string) (barcode.BarcodeIntCS, error) {
+func EncodeWithColor(content string, color barcode.ColorScheme) (barcode.BarcodeIntCS, error) {
 	contentRunes := strToRunes(content)
 	if len(contentRunes) <= 0 || len(contentRunes) > 80 {
 		return nil, fmt.Errorf("content length should be between 1 and 80 runes but got %d", len(contentRunes))
@@ -180,10 +180,19 @@ func Encode(content string) (barcode.BarcodeIntCS, error) {
 	sum = sum % 103
 	result.AddBit(encodingTable[sum]...)
 	result.AddBit(encodingTable[stopSymbol]...)
-	return utils.New1DCodeIntCheckSum(barcode.TypeCode128, content, result, sum), nil
+	return utils.New1DCodeIntCheckSumWithColor(barcode.TypeCode128, content, result, sum, color), nil
+}
+
+// Encode creates a Code 128 barcode for the given content
+func Encode(content string) (barcode.BarcodeIntCS, error) {
+	return EncodeWithColor(content, barcode.ColorScheme16)
 }
 
 func EncodeWithoutChecksum(content string) (barcode.Barcode, error) {
+	return EncodeWithoutChecksumWithColor(content, barcode.ColorScheme16)
+}
+
+func EncodeWithoutChecksumWithColor(content string, color barcode.ColorScheme) (barcode.Barcode, error) {
 	contentRunes := strToRunes(content)
 	if len(contentRunes) <= 0 || len(contentRunes) > 80 {
 		return nil, fmt.Errorf("content length should be between 1 and 80 runes but got %d", len(contentRunes))
@@ -199,5 +208,5 @@ func EncodeWithoutChecksum(content string) (barcode.Barcode, error) {
 		result.AddBit(encodingTable[idx]...)
 	}
 	result.AddBit(encodingTable[stopSymbol]...)
-	return utils.New1DCode(barcode.TypeCode128, content, result), nil
+	return utils.New1DCodeWithColor(barcode.TypeCode128, content, result, color), nil
 }

code39/encoder.go

@@ -111,9 +111,9 @@ func prepare(content string) (string, error) {
 	return result, nil
 }
 
-// Encode returns a code39 barcode for the given content
+// Encode returns a code39 barcode for the given content and color scheme
 // if includeChecksum is set to true, a checksum character is calculated and added to the content
-func Encode(content string, includeChecksum bool, fullASCIIMode bool) (barcode.BarcodeIntCS, error) {
+func EncodeWithColor(content string, includeChecksum bool, fullASCIIMode bool, color barcode.ColorScheme) (barcode.BarcodeIntCS, error) {
 	if fullASCIIMode {
 		var err error
 		content, err = prepare(content)
@@ -148,5 +148,11 @@ func Encode(content string, includeChecksum bool, fullASCIIMode bool) (barcode.B
 	if err != nil {
 		checkSum = 0
 	}
-	return utils.New1DCodeIntCheckSum(barcode.TypeCode39, content, result, int(checkSum)), nil
+	return utils.New1DCodeIntCheckSumWithColor(barcode.TypeCode39, content, result, int(checkSum), color), nil
+}
+
+// Encode returns a code39 barcode for the given content
+// if includeChecksum is set to true, a checksum character is calculated and added to the content
+func Encode(content string, includeChecksum bool, fullASCIIMode bool) (barcode.BarcodeIntCS, error) {
+	return EncodeWithColor(content, includeChecksum, fullASCIIMode, barcode.ColorScheme16)
 }

code93/encoder.go

@@ -74,9 +74,9 @@ func prepare(content string) (string, error) {
 	return result, nil
 }
 
-// Encode returns a code93 barcode for the given content
+// Encode returns a code93 barcode for the given content and color scheme
 // if includeChecksum is set to true, two checksum characters are calculated and added to the content
-func Encode(content string, includeChecksum bool, fullASCIIMode bool) (barcode.Barcode, error) {
+func EncodeWithColor(content string, includeChecksum bool, fullASCIIMode bool, color barcode.ColorScheme) (barcode.Barcode, error) {
 	if fullASCIIMode {
 		var err error
 		content, err = prepare(content)
@@ -104,7 +104,13 @@ func Encode(content string, includeChecksum bool, fullASCIIMode bool) (barcode.B
 	}
 	result.AddBit(true)
 
-	return utils.New1DCode(barcode.TypeCode93, content, result), nil
+	return utils.New1DCodeWithColor(barcode.TypeCode93, content, result, color), nil
+}
+
+// Encode returns a code93 barcode for the given content
+// if includeChecksum is set to true, two checksum characters are calculated and added to the content
+func Encode(content string, includeChecksum bool, fullASCIIMode bool) (barcode.Barcode, error) {
+	return EncodeWithColor(content, includeChecksum, fullASCIIMode, barcode.ColorScheme16)
 }
 
 func getChecksum(content string, maxWeight int) rune {

color_scheme.go

@@ -0,0 +1,39 @@
+package barcode
+
+import "image/color"
+
+// ColorScheme defines a structure for color schemes used in barcode rendering.
+// It includes the color model, background color, and foreground color.
+type ColorScheme struct {
+	Model      color.Model // Color model to be used (e.g., grayscale, RGB, RGBA)
+	Background color.Color // Color of the background
+	Foreground color.Color // Color of the foreground (e.g., bars in a barcode)
+}
+
+// ColorScheme8 represents a color scheme with 8-bit grayscale colors.
+var ColorScheme8 = ColorScheme{
+	Model:      color.GrayModel,
+	Background: color.Gray{Y: 255},
+	Foreground: color.Gray{Y: 0},
+}
+
+// ColorScheme16 represents a color scheme with 16-bit grayscale colors.
+var ColorScheme16 = ColorScheme{
+	Model:      color.Gray16Model,
+	Background: color.White,
+	Foreground: color.Black,
+}
+
+// ColorScheme24 represents a color scheme with 24-bit RGB colors.
+var ColorScheme24 = ColorScheme{
+	Model:      color.RGBAModel,
+	Background: color.RGBA{255, 255, 255, 255},
+	Foreground: color.RGBA{0, 0, 0, 255},
+}
+
+// ColorScheme32 represents a color scheme with 32-bit RGBA colors, which is similar to ColorScheme24 but typically includes alpha for transparency.
+var ColorScheme32 = ColorScheme{
+	Model:      color.RGBAModel,
+	Background: color.RGBA{255, 255, 255, 255},
+	Foreground: color.RGBA{0, 0, 0, 255},
+}

datamatrix/codelayout.go

@@ -1,8 +1,10 @@
 package datamatrix
 
 import (
-	"github.com/boombuler/barcode/utils"
 	"strconv"
+
+	"github.com/boombuler/barcode"
+	"github.com/boombuler/barcode/utils"
 )
 
 type setValFunc func(byte)
@@ -11,13 +13,15 @@ type codeLayout struct {
 	matrix *utils.BitList
 	occupy *utils.BitList
 	size   *dmCodeSize
+	color  barcode.ColorScheme
 }
 
-func newCodeLayout(size *dmCodeSize) *codeLayout {
+func newCodeLayout(size *dmCodeSize, color barcode.ColorScheme) *codeLayout {
 	result := new(codeLayout)
 	result.matrix = utils.NewBitList(size.MatrixColumns() * size.MatrixRows())
 	result.occupy = utils.NewBitList(size.MatrixColumns() * size.MatrixRows())
 	result.size = size
+	result.color = color
 	return result
 }
 
@@ -159,7 +163,7 @@ func (l *codeLayout) SetValues(data []byte) {
 }
 
 func (l *codeLayout) Merge() *datamatrixCode {
-	result := newDataMatrixCode(l.size)
+	result := newDataMatrixCodeWithColor(l.size, l.color)
 
 	//dotted horizontal lines
 	for r := 0; r < l.size.Rows; r += (l.size.RegionRows() + 2) {

datamatrix/datamatrixcode.go

@@ -12,10 +12,15 @@ type datamatrixCode struct {
 	*utils.BitList
 	*dmCodeSize
 	content string
+	color   barcode.ColorScheme
+}
+
+func newDataMatrixCodeWithColor(size *dmCodeSize, color barcode.ColorScheme) *datamatrixCode {
+	return &datamatrixCode{utils.NewBitList(size.Rows * size.Columns), size, "", color}
 }
 
 func newDataMatrixCode(size *dmCodeSize) *datamatrixCode {
-	return &datamatrixCode{utils.NewBitList(size.Rows * size.Columns), size, ""}
+	return &datamatrixCode{utils.NewBitList(size.Rows * size.Columns), size, "", barcode.ColorScheme16}
 }
 
 func (c *datamatrixCode) Content() string {
@@ -27,7 +32,11 @@ func (c *datamatrixCode) Metadata() barcode.Metadata {
 }
 
 func (c *datamatrixCode) ColorModel() color.Model {
-	return color.Gray16Model
+	return c.color.Model
+}
+
+func (c *datamatrixCode) ColorScheme() barcode.ColorScheme {
+	return c.color
 }
 
 func (c *datamatrixCode) Bounds() image.Rectangle {
@@ -36,9 +45,9 @@ func (c *datamatrixCode) Bounds() image.Rectangle {
 
 func (c *datamatrixCode) At(x, y int) color.Color {
 	if c.get(x, y) {
-		return color.Black
+		return c.color.Foreground
 	}
-	return color.White
+	return c.color.Background
 }
 
 func (c *datamatrixCode) get(x, y int) bool {

datamatrix/encoder.go

@@ -7,8 +7,8 @@ import (
 	"github.com/boombuler/barcode"
 )
 
-// Encode returns a Datamatrix barcode for the given content
+// Encode returns a Datamatrix barcode for the given content and color scheme
-func Encode(content string) (barcode.Barcode, error) {
+func EncodeWithColor(content string, color barcode.ColorScheme) (barcode.Barcode, error) {
 	data := encodeText(content)
 
 	var size *dmCodeSize
@@ -23,7 +23,7 @@ func Encode(content string) (barcode.Barcode, error) {
 	}
 	data = addPadding(data, size.DataCodewords())
 	data = ec.calcECC(data, size)
-	code := render(data, size)
+	code := render(data, size, color)
 	if code != nil {
 		code.content = content
 		return code, nil
@@ -31,8 +31,13 @@ func Encode(content string) (barcode.Barcode, error) {
 	return nil, errors.New("unable to render barcode")
 }
 
-func render(data []byte, size *dmCodeSize) *datamatrixCode {
+// Encode returns a Datamatrix barcode for the given content
-	cl := newCodeLayout(size)
+func Encode(content string) (barcode.Barcode, error) {
+	return EncodeWithColor(content, barcode.ColorScheme16)
+}
+
+func render(data []byte, size *dmCodeSize, color barcode.ColorScheme) *datamatrixCode {
+	cl := newCodeLayout(size, color)
 
 	cl.SetValues(data)
 
@@ -69,11 +74,11 @@ func addPadding(data []byte, toCount int) []byte {
 	}
 	for len(data) < toCount {
 		R := ((149 * (len(data) + 1)) % 253) + 1
-		tmp := 129 + R;
+		tmp := 129 + R
-		if (tmp > 254) {
+		if tmp > 254 {
 			tmp = tmp - 254
 		}
-		   
+
 		data = append(data, byte(tmp))
 	}
 	return data

ean/encoder.go

@@ -157,8 +157,8 @@ func encodeEAN13(code string) *utils.BitList {
 	return result
 }
 
-// Encode returns a EAN 8 or EAN 13 barcode for the given code
+// Encode returns a EAN 8 or EAN 13 barcode for the given code and color scheme
-func Encode(code string) (barcode.BarcodeIntCS, error) {
+func EncodeWithColor(code string, color barcode.ColorScheme) (barcode.BarcodeIntCS, error) {
 	var checkSum int
 	if len(code) == 7 || len(code) == 12 {
 		code += string(calcCheckNum(code))
@@ -175,13 +175,18 @@ func Encode(code string) (barcode.BarcodeIntCS, error) {
 	if len(code) == 8 {
 		result := encodeEAN8(code)
 		if result != nil {
-			return utils.New1DCodeIntCheckSum(barcode.TypeEAN8, code, result, checkSum), nil
+			return utils.New1DCodeIntCheckSumWithColor(barcode.TypeEAN8, code, result, checkSum, color), nil
 		}
 	} else if len(code) == 13 {
 		result := encodeEAN13(code)
 		if result != nil {
-			return utils.New1DCodeIntCheckSum(barcode.TypeEAN13, code, result, checkSum), nil
+			return utils.New1DCodeIntCheckSumWithColor(barcode.TypeEAN13, code, result, checkSum, color), nil
 		}
 	}
 	return nil, errors.New("invalid ean code data")
 }
+
+// Encode returns a EAN 8 or EAN 13 barcode for the given code
+func Encode(code string) (barcode.BarcodeIntCS, error) {
+	return EncodeWithColor(code, barcode.ColorScheme16)
+}

pdf417/encoder.go

@@ -12,10 +12,10 @@ const (
 	padding_codeword = 900
 )
 
-// Encodes the given data as PDF417 barcode.
+// Encodes the given data and color scheme as PDF417 barcode.
 // securityLevel should be between 0 and 8. The higher the number, the more
 // additional error-correction codes are added.
-func Encode(data string, securityLevel byte) (barcode.Barcode, error) {
+func EncodeWithColor(data string, securityLevel byte, color barcode.ColorScheme) (barcode.Barcode, error) {
 	if securityLevel >= 9 {
 		return nil, fmt.Errorf("Invalid security level %d", securityLevel)
 	}
@@ -34,6 +34,7 @@ func Encode(data string, securityLevel byte) (barcode.Barcode, error) {
 
 	barcode := new(pdfBarcode)
 	barcode.data = data
+	barcode.color = color
 
 	codeWords, err := encodeData(dataWords, columns, sl)
 	if err != nil {
@@ -70,6 +71,13 @@ func Encode(data string, securityLevel byte) (barcode.Barcode, error) {
 	return barcode, nil
 }
 
+// Encodes the given data as PDF417 barcode.
+// securityLevel should be between 0 and 8. The higher the number, the more
+// additional error-correction codes are added.
+func Encode(data string, securityLevel byte) (barcode.Barcode, error) {
+	return EncodeWithColor(data, securityLevel, barcode.ColorScheme16)
+}
+
 func encodeData(dataWords []int, columns int, sl securitylevel) ([]int, error) {
 	dataCount := len(dataWords)
 

pdf417/pdfcode.go

@@ -12,6 +12,7 @@ type pdfBarcode struct {
 	data  string
 	width int
 	code  *utils.BitList
+	color barcode.ColorScheme
 }
 
 func (c *pdfBarcode) Metadata() barcode.Metadata {
@@ -23,7 +24,11 @@ func (c *pdfBarcode) Content() string {
 }
 
 func (c *pdfBarcode) ColorModel() color.Model {
-	return color.Gray16Model
+	return c.color.Model
+}
+
+func (c *pdfBarcode) ColorScheme() barcode.ColorScheme {
+	return c.color
 }
 
 func (c *pdfBarcode) Bounds() image.Rectangle {
@@ -34,7 +39,7 @@ func (c *pdfBarcode) Bounds() image.Rectangle {
 
 func (c *pdfBarcode) At(x, y int) color.Color {
 	if c.code.GetBit((y/moduleHeight)*c.width + x) {
-		return color.Black
+		return c.color.Foreground
 	}
-	return color.White
+	return c.color.Background
 }

qr/encoder.go

@@ -54,8 +54,8 @@ func (e Encoding) String() string {
 	return ""
 }
 
-// Encode returns a QR barcode with the given content, error correction level and uses the given encoding
+// Encode returns a QR barcode with the given content and color scheme, error correction level and uses the given encoding
-func Encode(content string, level ErrorCorrectionLevel, mode Encoding) (barcode.Barcode, error) {
+func EncodeWithColor(content string, level ErrorCorrectionLevel, mode Encoding, color barcode.ColorScheme) (barcode.Barcode, error) {
 	bits, vi, err := mode.getEncoder()(content, level)
 	if err != nil {
 		return nil, err
@@ -63,19 +63,23 @@ func Encode(content string, level ErrorCorrectionLevel, mode Encoding) (barcode.
 
 	blocks := splitToBlocks(bits.IterateBytes(), vi)
 	data := blocks.interleave(vi)
-	result := render(data, vi)
+	result := render(data, vi, color)
 	result.content = content
 	return result, nil
 }
 
-func render(data []byte, vi *versionInfo) *qrcode {
+func Encode(content string, level ErrorCorrectionLevel, mode Encoding) (barcode.Barcode, error) {
+	return EncodeWithColor(content, level, mode, barcode.ColorScheme16)
+}
+
+func render(data []byte, vi *versionInfo, color barcode.ColorScheme) *qrcode {
 	dim := vi.modulWidth()
 	results := make([]*qrcode, 8)
 	for i := 0; i < 8; i++ {
-		results[i] = newBarcode(dim)
+		results[i] = newBarCodeWithColor(dim, color)
 	}
 
-	occupied := newBarcode(dim)
+	occupied := newBarCodeWithColor(dim, color)
 
 	setAll := func(x int, y int, val bool) {
 		occupied.Set(x, y, true)

qr/qrcode.go

@@ -13,6 +13,7 @@ type qrcode struct {
 	dimension int
 	data      *utils.BitList
 	content   string
+	color     barcode.ColorScheme
 }
 
 func (qr *qrcode) Content() string {
@@ -24,7 +25,11 @@ func (qr *qrcode) Metadata() barcode.Metadata {
 }
 
 func (qr *qrcode) ColorModel() color.Model {
-	return color.Gray16Model
+	return qr.color.Model
+}
+
+func (c *qrcode) ColorScheme() barcode.ColorScheme {
+	return c.color
 }
 
 func (qr *qrcode) Bounds() image.Rectangle {
@@ -33,9 +38,9 @@ func (qr *qrcode) Bounds() image.Rectangle {
 
 func (qr *qrcode) At(x, y int) color.Color {
 	if qr.Get(x, y) {
-		return color.Black
+		return qr.color.Foreground
 	}
-	return color.White
+	return qr.color.Background
 }
 
 func (qr *qrcode) Get(x, y int) bool {
@@ -158,9 +163,14 @@ func (qr *qrcode) calcPenaltyRule4() uint {
 	return uint(math.Min(floor, ceil) * 10)
 }
 
-func newBarcode(dim int) *qrcode {
+func newBarCodeWithColor(dim int, color barcode.ColorScheme) *qrcode {
 	res := new(qrcode)
 	res.dimension = dim
 	res.data = utils.NewBitList(dim * dim)
+	res.color = color
 	return res
 }
+
+func newBarcode(dim int) *qrcode {
+	return newBarCodeWithColor(dim, barcode.ColorScheme16)
+}

scaledbarcode.go

@@ -49,11 +49,22 @@ func (bc *intCSscaledBC) CheckSum() int {
 
 // Scale returns a resized barcode with the given width and height.
 func Scale(bc Barcode, width, height int) (Barcode, error) {
+	var fill color.Color
+	if v, ok := bc.(BarcodeColor); ok {
+		fill = v.ColorScheme().Background
+	} else {
+		fill = color.White
+	}
+	return ScaleWithFill(bc, width, height, fill)
+}
+
+// Scale returns a resized barcode with the given width, height and fill color.
+func ScaleWithFill(bc Barcode, width, height int, fill color.Color) (Barcode, error) {
 	switch bc.Metadata().Dimensions {
 	case 1:
-		return scale1DCode(bc, width, height)
+		return scale1DCode(bc, width, height, fill)
 	case 2:
-		return scale2DCode(bc, width, height)
+		return scale2DCode(bc, width, height, fill)
 	}
 
 	return nil, errors.New("unsupported barcode format")
@@ -72,7 +83,7 @@ func newScaledBC(wrapped Barcode, wrapperFunc wrapFunc, rect image.Rectangle) Ba
 	return result
 }
 
-func scale2DCode(bc Barcode, width, height int) (Barcode, error) {
+func scale2DCode(bc Barcode, width, height int, fill color.Color) (Barcode, error) {
 	orgBounds := bc.Bounds()
 	orgWidth := orgBounds.Max.X - orgBounds.Min.X
 	orgHeight := orgBounds.Max.Y - orgBounds.Min.Y
@@ -87,12 +98,12 @@ func scale2DCode(bc Barcode, width, height int) (Barcode, error) {
 
 	wrap := func(x, y int) color.Color {
 		if x < offsetX || y < offsetY {
-			return color.White
+			return fill
 		}
 		x = (x - offsetX) / factor
 		y = (y - offsetY) / factor
 		if x >= orgWidth || y >= orgHeight {
-			return color.White
+			return fill
 		}
 		return bc.At(x, y)
 	}
@@ -104,7 +115,7 @@ func scale2DCode(bc Barcode, width, height int) (Barcode, error) {
 	), nil
 }
 
-func scale1DCode(bc Barcode, width, height int) (Barcode, error) {
+func scale1DCode(bc Barcode, width, height int, fill color.Color) (Barcode, error) {
 	orgBounds := bc.Bounds()
 	orgWidth := orgBounds.Max.X - orgBounds.Min.X
 	factor := int(float64(width) / float64(orgWidth))
@@ -116,12 +127,12 @@ func scale1DCode(bc Barcode, width, height int) (Barcode, error) {
 
 	wrap := func(x, y int) color.Color {
 		if x < offsetX {
-			return color.White
+			return fill
 		}
 		x = (x - offsetX) / factor
 
 		if x >= orgWidth {
-			return color.White
+			return fill
 		}
 		return bc.At(x, 0)
 	}

twooffive/encoder.go

@@ -78,8 +78,8 @@ func AddCheckSum(content string) (string, error) {
 	return content + string(utils.IntToRune(sum%10)), nil
 }
 
-// Encode creates a codabar barcode for the given content
+// Encode creates a codabar barcode for the given content and color scheme
-func Encode(content string, interleaved bool) (barcode.Barcode, error) {
+func EncodeWithColor(content string, interleaved bool, color barcode.ColorScheme) (barcode.Barcode, error) {
 	if content == "" {
 		return nil, errors.New("content is empty")
 	}
@@ -131,8 +131,13 @@ func Encode(content string, interleaved bool) (barcode.Barcode, error) {
 	resBits.AddBit(mode.end...)
 
 	if interleaved {
-		return utils.New1DCode(barcode.Type2of5Interleaved, content, resBits), nil
+		return utils.New1DCodeWithColor(barcode.Type2of5Interleaved, content, resBits, color), nil
 	} else {
-		return utils.New1DCode(barcode.Type2of5, content, resBits), nil
+		return utils.New1DCodeWithColor(barcode.Type2of5, content, resBits, color), nil
 	}
 }
+
+// Encode creates a codabar barcode for the given content
+func Encode(content string, interleaved bool) (barcode.Barcode, error) {
+	return EncodeWithColor(content, interleaved, barcode.ColorScheme16)
+}

utils/base1dcode.go

@@ -12,6 +12,7 @@ type base1DCode struct {
 	*BitList
 	kind    string
 	content string
+	color   barcode.ColorScheme
 }
 
 type base1DCodeIntCS struct {
@@ -28,7 +29,11 @@ func (c *base1DCode) Metadata() barcode.Metadata {
 }
 
 func (c *base1DCode) ColorModel() color.Model {
-	return color.Gray16Model
+	return c.color.Model
+}
+
+func (c *base1DCode) ColorScheme() barcode.ColorScheme {
+	return c.color
 }
 
 func (c *base1DCode) Bounds() image.Rectangle {
@@ -37,9 +42,9 @@ func (c *base1DCode) Bounds() image.Rectangle {
 
 func (c *base1DCode) At(x, y int) color.Color {
 	if c.GetBit(x) {
-		return color.Black
+		return c.color.Foreground
 	}
-	return color.White
+	return c.color.Background
 }
 
 func (c *base1DCodeIntCS) CheckSum() int {
@@ -48,10 +53,20 @@ func (c *base1DCodeIntCS) CheckSum() int {
 
 // New1DCodeIntCheckSum creates a new 1D barcode where the bars are represented by the bits in the bars BitList
 func New1DCodeIntCheckSum(codeKind, content string, bars *BitList, checksum int) barcode.BarcodeIntCS {
-	return &base1DCodeIntCS{base1DCode{bars, codeKind, content}, checksum}
+	return &base1DCodeIntCS{base1DCode{bars, codeKind, content, barcode.ColorScheme16}, checksum}
+}
+
+// New1DCodeIntCheckSum creates a new 1D barcode where the bars are represented by the bits in the bars BitList
+func New1DCodeIntCheckSumWithColor(codeKind, content string, bars *BitList, checksum int, color barcode.ColorScheme) barcode.BarcodeIntCS {
+	return &base1DCodeIntCS{base1DCode{bars, codeKind, content, color}, checksum}
 }
 
 // New1DCode creates a new 1D barcode where the bars are represented by the bits in the bars BitList
 func New1DCode(codeKind, content string, bars *BitList) barcode.Barcode {
-	return &base1DCode{bars, codeKind, content}
+	return &base1DCode{bars, codeKind, content, barcode.ColorScheme16}
+}
+
+// New1DCode creates a new 1D barcode where the bars are represented by the bits in the bars BitList
+func New1DCodeWithColor(codeKind, content string, bars *BitList, color barcode.ColorScheme) barcode.Barcode {
+	return &base1DCode{bars, codeKind, content, color}
 }