Add first wip

go.mod

@@ -0,0 +1,18 @@
+module code.ppl.town/justin/qr_labels
+
+go 1.25.0
+
+require (
+	codeberg.org/go-pdf/fpdf v0.11.1
+	github.com/yeqown/go-qrcode/v2 v2.2.5
+	github.com/yeqown/go-qrcode/writer/standard v1.3.0
+)
+
+require (
+	github.com/fogleman/gg v1.3.0 // indirect
+	github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0 // indirect
+	github.com/pkg/errors v0.9.1 // indirect
+	golang.org/x/image v0.15.0 // indirect
+)
+
+require github.com/yeqown/reedsolomon v1.0.0 // indirect

go.sum

@@ -0,0 +1,24 @@
+codeberg.org/go-pdf/fpdf v0.11.1 h1:U8+coOTDVLxHIXZgGvkfQEi/q0hYHYvEHFuGNX2GzGs=
+codeberg.org/go-pdf/fpdf v0.11.1/go.mod h1:Y0DGRAdZ0OmnZPvjbMp/1bYxmIPxm0ws4tfoPOc4LjU=
+github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/fogleman/gg v1.3.0 h1:/7zJX8F6AaYQc57WQCyN9cAIz+4bCJGO9B+dyW29am8=
+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 h1:DACJavvAHhabrF08vX0COfcOBJRhZ8lUbR+ZWIs0Y5g=
+github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0/go.mod h1:E/TSTwGwJL78qG/PmXZO1EjYhfJinVAhrmmHX6Z8B9k=
+github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
+github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
+github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+github.com/yeqown/go-qrcode/v2 v2.2.5 h1:HCOe2bSjkhZyYoyyNaXNzh4DJZll6inVJQQw+8228Zk=
+github.com/yeqown/go-qrcode/v2 v2.2.5/go.mod h1:uHpt9CM0V1HeXLz+Wg5MN50/sI/fQhfkZlOM+cOTHxw=
+github.com/yeqown/go-qrcode/writer/standard v1.3.0 h1:chdyhEfRtUPgQtuPeaWVGQ/TQx4rE1PqeoW3U+53t34=
+github.com/yeqown/go-qrcode/writer/standard v1.3.0/go.mod h1:O4MbzsotGCvy8upYPCR91j81dr5XLT7heuljcNXW+oQ=
+github.com/yeqown/reedsolomon v1.0.0 h1:x1h/Ej/uJnNu8jaX7GLHBWmZKCAWjEJTetkqaabr4B0=
+github.com/yeqown/reedsolomon v1.0.0/go.mod h1:P76zpcn2TCuL0ul1Fso373qHRc69LKwAw/Iy6g1WiiM=
+golang.org/x/image v0.15.0 h1:kOELfmgrmJlw4Cdb7g/QGuB3CvDrXbqEIww/pNtNBm8=
+golang.org/x/image v0.15.0/go.mod h1:HUYqC05R2ZcZ3ejNQsIHQDQiwWM4JBqmm6MKANTp4LE=
+gopkg.in/yaml.v3 v3.0.0 h1:hjy8E9ON/egN1tAYqKb61G10WtihqetD4sz2H+8nIeA=
+gopkg.in/yaml.v3 v3.0.0/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

main.go

@@ -0,0 +1,95 @@
+package main
+
+import (
+	"fmt"
+	"image/color"
+
+	"codeberg.org/go-pdf/fpdf"
+	"github.com/yeqown/go-qrcode/v2"
+	"github.com/yeqown/go-qrcode/writer/standard"
+)
+
+// 1
+
+var cols = 4
+var rows = 7
+var qrSize = 35
+var offset = qrSize/2 + 5
+
+func main() {
+	qrc, err := qrcode.New("https://nanocat.net")
+	if err != nil {
+		fmt.Printf("could not generate QRCode: %v", err)
+		return
+	}
+
+	b := newBWC()
+	qrBytes := standard.NewWithWriter(&b,
+		standard.WithBuiltinImageEncoder(standard.PNG_FORMAT),
+		standard.WithCircleShape(),
+		standard.WithFgGradient(&standard.LinearGradient{
+			Stops: []standard.ColorStop{{
+				T: 0.0,
+				Color: color.RGBA{
+					R: 255,
+					G: 0,
+					B: 0,
+					A: 0,
+				},
+			}, {
+				T: 1.0,
+				Color: color.RGBA{
+					R: 0,
+					G: 255,
+					B: 0,
+					A: 0,
+				},
+			}},
+			Angle: 45,
+		}), standard.WithLogoImageFileJPEG("cat-pet-animal-domestic-104827.jpeg"),
+	)
+
+	// save file
+	if err = qrc.Save(qrBytes); err != nil {
+		fmt.Printf("could not save image: %v", err)
+	}
+
+	pdf := fpdf.New("P", "mm", "A4", "")
+	pageWidth, pageHeight := pdf.GetPageSize()
+
+	// register the qr
+	pdf.RegisterImageOptionsReader("qr", fpdf.ImageOptions{
+		ImageType:             "png",
+		ReadDpi:               false,
+		AllowNegativePosition: false,
+	}, b)
+
+	pdf.AddPage()
+	pdf.SetFont("Arial", "B", 16)
+
+	text := "foobar"
+	textWidth := pdf.GetStringWidth(text)
+
+	colWidth := pageWidth / float64(cols)
+	rowHeight := pageHeight / float64(rows)
+
+	for i := 0; i < rows; i++ {
+		for j := 0; j < cols; j++ {
+			pdf.Text(colWidth*float64(j)+colWidth/2-textWidth/2,
+				rowHeight*float64(i)+rowHeight/2-float64(offset),
+				text)
+
+			pdf.Image("qr",
+				colWidth*float64(j)+colWidth/2-float64(qrSize)/2, rowHeight*float64(i)+rowHeight/2+float64(offset),
+				float64(qrSize), float64(qrSize),
+				false, "tp", 0, "")
+
+		}
+	}
+
+	err = pdf.OutputFileAndClose("hello.pdf")
+	if err != nil {
+		panic(err)
+	}
+	fmt.Println(pageWidth, pageHeight)
+}

structs.go

@@ -0,0 +1,17 @@
+package main
+
+import "bytes"
+
+type bufferWriteCloser struct {
+	*bytes.Buffer
+}
+
+func (bwc *bufferWriteCloser) Close() error {
+	return nil
+}
+
+func newBWC() bufferWriteCloser {
+	return bufferWriteCloser{
+		Buffer: &bytes.Buffer{},
+	}
+}