1 files changed, 43 insertions, 24 deletions

diff --git a/vendor/github.com/skip2/go-qrcode/qrcode.go b/vendor/github.com/skip2/go-qrcode/qrcode.go
index 9428d863..d0541bcb 100644
--- a/vendor/github.com/skip2/go-qrcode/qrcode.go
+++ b/vendor/github.com/skip2/go-qrcode/qrcode.go
@@ -51,6 +51,7 @@ package qrcode
 import (
 	"bytes"
 	"errors"
+	"fmt"
 	"image"
 	"image/color"
 	"image/png"
@@ -135,6 +136,9 @@ type QRCode struct {
 	ForegroundColor color.Color
 	BackgroundColor color.Color
 
+	// Disable the QR Code border.
+	DisableBorder bool
+
 	encoder *dataEncoder
 	version qrCodeVersion
 
@@ -193,12 +197,16 @@ func New(content string, level RecoveryLevel) (*QRCode, error) {
 		version: *chosenVersion,
 	}
 
-	q.encode(chosenVersion.numTerminatorBitsRequired(encoded.Len()))
-
 	return q, nil
 }
 
-func newWithForcedVersion(content string, version int, level RecoveryLevel) (*QRCode, error) {
+// NewWithForcedVersion constructs a QRCode of a specific version.
+//
+//	var q *qrcode.QRCode
+//	q, err := qrcode.NewWithForcedVersion("my content", 25, qrcode.Medium)
+//
+// An error occurs in case of invalid version.
+func NewWithForcedVersion(content string, version int, level RecoveryLevel) (*QRCode, error) {
 	var encoder *dataEncoder
 
 	switch {
@@ -209,7 +217,7 @@ func newWithForcedVersion(content string, version int, level RecoveryLevel) (*QR
 	case version >= 27 && version <= 40:
 		encoder = newDataEncoder(dataEncoderType27To40)
 	default:
-		log.Fatalf("Invalid version %d (expected 1-40 inclusive)", version)
+		return nil, fmt.Errorf("Invalid version %d (expected 1-40 inclusive)", version)
 	}
 
 	var encoded *bitset.Bitset
@@ -225,6 +233,13 @@ func newWithForcedVersion(content string, version int, level RecoveryLevel) (*QR
 		return nil, errors.New("cannot find QR Code version")
 	}
 
+	if encoded.Len() > chosenVersion.numDataBits() {
+		return nil, fmt.Errorf("Cannot encode QR code: content too large for fixed size QR Code version %d (encoded length is %d bits, maximum length is %d bits)",
+			version,
+			encoded.Len(),
+			chosenVersion.numDataBits())
+	}
+
 	q := &QRCode{
 		Content: content,
 
@@ -239,8 +254,6 @@ func newWithForcedVersion(content string, version int, level RecoveryLevel) (*QR
 		version: *chosenVersion,
 	}
 
-	q.encode(chosenVersion.numTerminatorBitsRequired(encoded.Len()))
-
 	return q, nil
 }
 
@@ -251,6 +264,9 @@ func newWithForcedVersion(content string, version int, level RecoveryLevel) (*QR
 // The bitmap includes the required "quiet zone" around the QR Code to aid
 // decoding.
 func (q *QRCode) Bitmap() [][]bool {
+	// Build QR code.
+	q.encode()
+
 	return q.symbol.bitmap()
 }
 
@@ -268,6 +284,9 @@ func (q *QRCode) Bitmap() [][]bool {
 // negative number to increase the scale of the image. e.g. a size of -5 causes
 // each module (QR Code "pixel") to be 5px in size.
 func (q *QRCode) Image(size int) image.Image {
+	// Build QR code.
+	q.encode()
+
 	// Minimum pixels (both width and height) required.
 	realSize := q.symbol.size
 
@@ -282,12 +301,7 @@ func (q *QRCode) Image(size int) image.Image {
 		size = realSize
 	}
 
-	// Size of each module drawn.
-	pixelsPerModule := size / realSize
-
-	// Center the symbol within the image.
-	offset := (size - realSize*pixelsPerModule) / 2
-
+	// Output image.
 	rect := image.Rectangle{Min: image.Point{0, 0}, Max: image.Point{size, size}}
 
 	// Saves a few bytes to have them in this order
@@ -295,18 +309,21 @@ func (q *QRCode) Image(size int) image.Image {
 	img := image.NewPaletted(rect, p)
 	fgClr := uint8(img.Palette.Index(q.ForegroundColor))
 
+	// QR code bitmap.
 	bitmap := q.symbol.bitmap()
-	for y, row := range bitmap {
-		for x, v := range row {
+
+	// Map each image pixel to the nearest QR code module.
+	modulesPerPixel := float64(realSize) / float64(size)
+	for y := 0; y < size; y++ {
+		y2 := int(float64(y) * modulesPerPixel)
+		for x := 0; x < size; x++ {
+			x2 := int(float64(x) * modulesPerPixel)
+
+			v := bitmap[y2][x2]
+
 			if v {
-				startX := x*pixelsPerModule + offset
-				startY := y*pixelsPerModule + offset
-				for i := startX; i < startX+pixelsPerModule; i++ {
-					for j := startY; j < startY+pixelsPerModule; j++ {
-						pos := img.PixOffset(i, j)
-						img.Pix[pos] = fgClr
-					}
-				}
+				pos := img.PixOffset(x, y)
+				img.Pix[pos] = fgClr
 			}
 		}
 	}
@@ -371,7 +388,9 @@ func (q *QRCode) WriteFile(size int, filename string) error {
 // encode completes the steps required to encode the QR Code. These include
 // adding the terminator bits and padding, splitting the data into blocks and
 // applying the error correction, and selecting the best data mask.
-func (q *QRCode) encode(numTerminatorBits int) {
+func (q *QRCode) encode() {
+	numTerminatorBits := q.version.numTerminatorBitsRequired(q.data.Len())
+
 	q.addTerminatorBits(numTerminatorBits)
 	q.addPadding()
 
@@ -384,7 +403,7 @@ func (q *QRCode) encode(numTerminatorBits int) {
 		var s *symbol
 		var err error
 
-		s, err = buildRegularSymbol(q.version, mask, encoded)
+		s, err = buildRegularSymbol(q.version, mask, encoded, !q.DisableBorder)
 
 		if err != nil {
 			log.Panic(err.Error())