Implement a Mininum Version for QR Code generation

.issues/go.mod

@@ -3,7 +3,9 @@ module issues
 go 1.19
 
 require (
-	github.com/yeqown/go-qrcode/v2 v2.2.2
 	github.com/skip2/go-qrcode v0.0.0-20200617195104-da1b6568686e
+	github.com/yeqown/go-qrcode/v2 v2.2.5
+	github.com/yeqown/go-qrcode/writer/compressed v1.0.1
 )
 
+require github.com/yeqown/reedsolomon v1.0.0 // indirect

cmd/qrcode/go.mod

@@ -14,12 +14,14 @@ require (
 	github.com/cpuguy83/go-md2man/v2 v2.0.0-20190314233015-f79a8a8ca69d // indirect
 	github.com/fogleman/gg v1.3.0 // indirect
 	github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0 // indirect
-	github.com/mattn/go-runewidth v0.0.9 // indirect
+	github.com/mattn/go-runewidth v0.0.16 // indirect
 	github.com/nsf/termbox-go v1.1.1 // indirect
+	github.com/rivo/uniseg v0.4.7 // indirect
 	github.com/russross/blackfriday/v2 v2.0.1 // indirect
 	github.com/shurcooL/sanitized_anchor_name v1.0.0 // indirect
 	github.com/yeqown/reedsolomon v1.0.0 // indirect
-	golang.org/x/image v0.18.0 // indirect
+	golang.org/x/image v0.24.0 // indirect
+	gopkg.in/yaml.v3 v3.0.0 // indirect
 )
 
 //replace (

cmd/wasm/go.mod

@@ -12,5 +12,6 @@ require (
 	github.com/fogleman/gg v1.3.0 // indirect
 	github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0 // indirect
 	github.com/yeqown/reedsolomon v1.0.0 // indirect
-	golang.org/x/image v0.10.0 // indirect
+	golang.org/x/image v0.24.0 // indirect
+	gopkg.in/yaml.v3 v3.0.0 // indirect
 )

encoder.go

@@ -93,7 +93,6 @@ func newEncoder(m encMode, ec ecLevel, v version) *encoder {
 // Encode ...
 // 1. encode raw data into bitset
 // 2. append _defaultPadding data
-//
 func (e *encoder) Encode(byts []byte) (*binary.Binary, error) {
 	e.dst = binary.New()
 	e.data = byts
@@ -293,7 +292,6 @@ type analyzeEncFunc func(byte) bool
 // case2: could not use EncModeNumeric, but you can find all of them in character mapping, use EncModeAlphanumeric.
 // case3: could not use EncModeAlphanumeric, but you can find all of them in ISO-8859-1 character set, use EncModeByte.
 // case4: could not use EncModeByte, use EncModeJP, no more choice.
-//
 func analyzeEncodeModeFromRaw(raw []byte) encMode {
 	analyzeFnMapping := map[encMode]analyzeEncFunc{
 		EncModeNumeric:      analyzeNum,

encoder_option.go

@@ -16,6 +16,10 @@ type encodingOption struct {
 	// Version of target QR code.
 	Version int
 
+	// MinimumVersion specifies the minimum version of target QR code.
+	// If the automatically analyzed version is lower than this, this minimum will be used.
+	MinimumVersion int
+
 	// EncMode specifies which encMode to use
 	EncMode encMode
 
@@ -69,3 +73,16 @@ func WithVersion(version int) EncodeOption {
 		option.Version = version
 	})
 }
+
+// WithMinimumVersion sets the minimum version of target QR code.
+// If the automatically analyzed version is lower than this minimum,
+// the minimum version will be used instead.
+func WithMinimumVersion(version int) EncodeOption {
+	return newFnEncodingOption(func(option *encodingOption) {
+		if version < 1 || version > _VERSION_COUNT {
+			return
+		}
+
+		option.MinimumVersion = version
+	})
+}

example/go.mod

@@ -6,7 +6,7 @@ require (
 	github.com/yeqown/go-qrcode v1.5.10
 	github.com/yeqown/go-qrcode/v2 v2.2.5
 	github.com/yeqown/go-qrcode/writer/file v0.0.0-20250211110803-2fa59f4d4375
-	github.com/yeqown/go-qrcode/writer/standard v1.2.4
+	github.com/yeqown/go-qrcode/writer/standard v1.3.0
 	github.com/yeqown/go-qrcode/writer/terminal v1.1.1
 )
 

example/with-minimum-version/.gitignore

@@ -0,0 +1 @@
+*.png

example/with-minimum-version/README.md

@@ -0,0 +1,44 @@
+# QR Code with Minimum Version Example
+
+This example demonstrates how to use the `WithMinimumVersion` option to ensure that a QR code has at least a specific version level.
+
+## What is QR Code Version?
+
+QR code versions range from 1 to 40, with higher versions supporting more data capacity and having larger dimensions:
+- Version 1: 21x21 modules
+- Version 9: 53x53 modules  
+- Version 40: 177x177 modules
+
+The formula is: dimension = (version × 4) + 17
+
+## Why Use Minimum Version?
+
+Sometimes you want to ensure a QR code has a minimum size or capacity, even if the content would fit in a smaller version:
+
+1. **Consistency**: Keep QR codes the same size across different content lengths
+2. **Future-proofing**: Reserve capacity for potential content expansion
+3. **Readability**: Larger QR codes are easier to scan from a distance
+4. **Design requirements**: Match specific design or layout requirements
+
+## Usage
+
+```go
+qrc, err := qrcode.NewWith("your-text-here",
+    qrcode.WithMinimumVersion(9),
+    qrcode.WithErrorCorrectionLevel(qrcode.ErrorCorrectionQuart),
+)
+```
+
+## Running the Example
+
+```bash
+go run main.go
+```
+
+This will generate two QR codes:
+1. `qrcode_minimum_version_9.png` - A QR code with minimum version 9 (53x53 modules)
+2. `qrcode_auto_version.png` - The same content with automatic version selection (much smaller)
+
+## Note
+
+If the content naturally requires a version higher than the minimum, the higher version will be used. The minimum version only applies when the automatic version would be lower.

example/with-minimum-version/main.go

@@ -0,0 +1,52 @@
+package main
+
+import (
+	"fmt"
+
+	"github.com/yeqown/go-qrcode/v2"
+	"github.com/yeqown/go-qrcode/writer/standard"
+)
+
+func main() {
+	// Example 1: Generate a QR code with minimum version 9
+	// Even though the text "Hello" would fit in a smaller version,
+	// the QR code will be at least version 9
+	qrc, err := qrcode.NewWith("Hello",
+		qrcode.WithMinimumVersion(9),
+		qrcode.WithErrorCorrectionLevel(qrcode.ErrorCorrectionQuart),
+	)
+	if err != nil {
+		panic(fmt.Sprintf("could not generate QRCode: %v", err))
+	}
+
+	w, err := standard.New("./qrcode_minimum_version_9.png", standard.WithQRWidth(20))
+	if err != nil {
+		panic(fmt.Sprintf("could not create writer: %v", err))
+	}
+
+	if err = qrc.Save(w); err != nil {
+		panic(fmt.Sprintf("could not save QRCode: %v", err))
+	}
+
+	fmt.Printf("QR code generated with minimum version 9\n")
+	fmt.Printf("Dimension: %d x %d\n", qrc.Dimension(), qrc.Dimension())
+	fmt.Printf("Expected dimension for version 9: %d x %d\n", 9*4+17, 9*4+17)
+
+	// Example 2: Compare with automatic version selection
+	qrc2, err := qrcode.New("Hello")
+	if err != nil {
+		panic(fmt.Sprintf("could not generate QRCode: %v", err))
+	}
+
+	w2, err := standard.New("./qrcode_auto_version.png", standard.WithQRWidth(20))
+	if err != nil {
+		panic(fmt.Sprintf("could not create writer: %v", err))
+	}
+
+	if err = qrc2.Save(w2); err != nil {
+		panic(fmt.Sprintf("could not save QRCode: %v", err))
+	}
+
+	fmt.Printf("\nFor comparison, QR code with automatic version:\n")
+	fmt.Printf("Dimension: %d x %d (much smaller)\n", qrc2.Dimension(), qrc2.Dimension())
+}

go.work

@@ -3,11 +3,11 @@ go 1.19
 use (
 	.
 	./.issues
+	./cmd/qrcode
+	./cmd/wasm
 	./writer/compressed
+	./writer/file
 	./writer/standard
 	./writer/terminal
-	./writer/file
-	./cmd/qrcode
-	./cmd/wasm
 	example
 )

go.work.sum

@@ -1,70 +1,57 @@
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-github.com/cpuguy83/go-md2man/v2 v2.0.0-20190314233015-f79a8a8ca69d h1:U+s90UTSYgptZMwQh2aRr3LuazLJIa+Pg3Kc1ylSYVY=
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+github.com/cpuguy83/go-md2man/v2 v2.0.0-20190314233015-f79a8a8ca69d/go.mod h1:maD7wRr/U5Z6m/iR4s+kqSMx2CaBsrgA7czyZG/E6dU=
+github.com/fogleman/gg v1.3.0/go.mod h1:R/bRT+9gY/C5z7JzPU0zXsXHKM4/ayA+zqcVNZzPa1k=
+github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0/go.mod h1:E/TSTwGwJL78qG/PmXZO1EjYhfJinVAhrmmHX6Z8B9k=
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-github.com/russross/blackfriday/v2 v2.0.1 h1:lPqVAte+HuHNfhJ/0LC98ESWRz8afy9tM/0RK8m9o+Q=
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-golang.org/x/text v0.22.0/go.mod h1:YRoo4H8PVmsu+E3Ou7cqLVH8oXWIHVoX0jqUWALQhfY=
-golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
-golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
-golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
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-golang.org/x/tools v0.6.0/go.mod h1:Xwgl3UAJ/d3gWutnCtw505GrjyAbvKui8lOU390QaIU=
 golang.org/x/tools v0.21.1-0.20240508182429-e35e4ccd0d2d h1:vU5i/LfpvrRCpgM/VPfJLg5KjxD3E+hfT1SH+d9zLwg=
-golang.org/x/tools v0.21.1-0.20240508182429-e35e4ccd0d2d/go.mod h1:aiJjzUbINMkxbQROHiO6hDPo2LHcIPhhQsa9DLh0yGk=
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-golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
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+gopkg.in/yaml.v2 v2.2.3/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=

mask_evaluation.go

@@ -136,7 +136,6 @@ func rule3(mat *Matrix) (score int) {
 // 5. Subtract 50 from each of these multiples of five and take the absolute qrbool of the result.
 // 6. Divide each of these by five. For example, 10/5 = 2 and 5/5 = 1.
 // 7. Finally, take the smallest of the two numbers and multiply it by 10.
-//
 func rule4(mat *Matrix) int {
 	// prerequisites:
 	//

qrcode.go

@@ -146,6 +146,11 @@ func (q *QRCode) calcVersion() (ver *version, err error) {
 			return nil, err
 		}
 		opt.Version = analyzed.Ver
+
+		// Apply minimum version constraint if set
+		if opt.MinimumVersion > 0 && opt.Version < opt.MinimumVersion {
+			opt.Version = opt.MinimumVersion
+		}
 	}
 
 	q.v = loadVersion(opt.Version, opt.EcLevel)