Add make-address-labels

Signed-off-by: Glenn Lewis <6598971+gmlewis@users.noreply.github.com>

.gitignore

@@ -1,3 +1,5 @@
 *.png
 *.dxf
 *.sh
+*.txt
+*.pdf

cmd/font2mbt/main.go

@@ -274,6 +274,19 @@ func (g *glyphT) regenerateFace() {
 	g.d = d.String()
 }
 
+func runeToMbtString(s string) string {
+	switch s {
+	case `"`:
+		return `\"`
+	case `\`:
+		return `\\`
+	case "\t", "\n", "\r":
+		return fmt.Sprintf(`\x%x`, s)
+	default:
+		return s
+	}
+}
+
 func writeFont(fontData *webfont.FontData) {
 	p := &processor{glyphs: map[string]*glyphT{}}
 	if err := webfont.ParseNeededGlyphs(fontData, "", p); err != nil { // DEBUGGING ONLY
@@ -290,13 +303,7 @@ func writeFont(fontData *webfont.FontData) {
 	for _, unicode := range keys {
 		glyph := p.glyphs[unicode]
 
-		mbtChar := string(unicode)
-		switch mbtChar {
-		case `"`:
-			mbtChar = `\"`
-		case `\`:
-			mbtChar = `\\`
-		}
+		mbtChar := runeToMbtString(unicode)
 
 		lines = append(lines, fmt.Sprintf(`"%v": {`, mbtChar))
 		lines = append(lines, fmt.Sprintf(`  char: "%v",`, mbtChar))

cmd/font2mbt/main_test.go

@@ -1,7 +1,40 @@
 package main
 
+import "testing"
+
 func String(s string) *string { return &s }
 
+func TestRuneToMbtString(t *testing.T) {
+	t.Parallel()
+	tests := []struct {
+		s    string
+		want string
+	}{
+		{
+			s:    "\t",
+			want: `\x09`,
+		},
+		{
+			s:    "\r",
+			want: `\x0d`,
+		},
+		{
+			s:    "\n",
+			want: `\x0a`,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.s, func(t *testing.T) {
+			got := runeToMbtString(tt.s)
+
+			if got != tt.want {
+				t.Errorf("runeToMbtString(%q) = '%v', want '%v'", tt.s, got, tt.want)
+			}
+		})
+	}
+}
+
 /* removed regeneration
 func TestProcessor_Letter_a(t *testing.T) {
 	g := &webfont.Glyph{

examples/make-address-labels/BalsamiqSans-Regular.json

@@ -0,0 +1 @@
+{"Tp":"TrueType","Name":"BalsamiqSans-Regular","Desc":{"Ascent":900,"Descent":-300,"CapHeight":715,"Flags":32,"FontBBox":{"Xmin":-385,"Ymin":-346,"Xmax":1306,"Ymax":1134},"ItalicAngle":0,"StemV":70,"MissingWidth":465},"Up":-75,"Ut":50,"Cw":[465,465,465,465,465,465,465,465,465,465,465,465,465,465,465,465,465,465,465,465,465,465,465,465,465,465,465,465,465,465,465,465,270,209,373,643,711,944,663,224,360,371,467,669,182,366,195,452,588,387,590,615,610,573,611,491,583,578,202,206,697,715,761,507,922,611,685,711,729,659,596,750,731,310,540,645,575,863,752,762,629,778,711,605,601,732,618,911,566,584,613,375,424,342,527,618,193,566,563,532,573,593,309,577,553,234,238,490,223,827,564,568,580,584,361,495,307,557,480,671,468,452,478,426,205,428,704,465,757,465,217,517,354,772,566,611,291,1052,667,286,1060,465,613,465,465,268,185,423,423,260,659,871,385,854,554,305,984,465,500,636,270,214,624,644,627,622,206,635,294,803,446,528,667,389,782,317,461,652,432,380,193,621,654,112,211,333,423,557,896,954,905,471,613,619,598,601,605,613,946,711,693,637,667,685,288,309,288,288,729,767,730,777,762,789,799,668,786,727,701,687,703,584,643,558,568,566,566,572,566,566,854,532,602,602,602,602,237,237,237,216,610,565,557,570,564,568,563,646,563,549,549,561,563,452,540,432],"Enc":"cp1252","Diff":"","File":"BalsamiqSans-Regular.z","Size1":0,"Size2":0,"OriginalSize":389840,"N":0,"DiffN":0}

examples/make-address-labels/go.mod

@@ -0,0 +1,5 @@
+module github.com/gmlewis/go-fonts/examples/make-address-labels
+
+go 1.23.0
+
+require github.com/go-pdf/fpdf v0.9.0

examples/make-address-labels/go.sum

@@ -0,0 +1,2 @@
+github.com/go-pdf/fpdf v0.9.0 h1:PPvSaUuo1iMi9KkaAn90NuKi+P4gwMedWPHhj8YlJQw=
+github.com/go-pdf/fpdf v0.9.0/go.mod h1:oO8N111TkmKb9D7VvWGLvLJlaZUQVPM+6V42pp3iV4Y=

examples/make-address-labels/main.go

@@ -0,0 +1,106 @@
+// -*- compile-command: "go run main.go postcard-labels.txt"; -*-
+
+// make-address-labels reads a text file and generates a PDF that can be used
+// to print on a standard 8.5x11 inch page of 30 labels arranged in a 3x10 grid.
+// Each label is 66mm wide and 25mm high.
+//
+// The format of the text file is:
+//
+// Recipient1 Name
+// Address Line 1
+// Address Line 2
+// Address Line 3
+//
+// Recipient2 Name
+// etc...
+//
+// Usage:
+//
+//	make-address-labels addresses.txt
+//
+// This will write a file called "addresses.pdf".
+package main
+
+import (
+	_ "embed"
+	"flag"
+	"log"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/go-pdf/fpdf"
+)
+
+const (
+	pdfMarginMM   = 10
+	pdfDPI        = 300
+	mmPerInch     = 25.4
+	dpmm          = pdfDPI / mmPerInch // pixels/mm for 300DPI images
+	widthInches   = 8.5
+	heightInches  = 11
+	widthMM       = widthInches * mmPerInch
+	heightMM      = heightInches * mmPerInch
+	labelWidthMM  = 66
+	labelHeightMM = 25
+	numLabelsX    = 3
+	numLabelsY    = 10
+	font1Family   = "Balsamiq Sans"
+)
+
+//go:embed BalsamiqSans-Regular.json
+var BalsamiqSansRegularJSON []byte
+
+//go:embed BalsamiqSans-Regular.z
+var BalsamiqSansRegularZ []byte
+
+func main() {
+	flag.Parse()
+
+	for _, filename := range flag.Args() {
+		process(filename)
+	}
+
+	log.Printf("Done.")
+}
+
+func process(filename string) {
+	buf, err := os.ReadFile(filename)
+	must(err)
+
+	addresses := strings.Split(string(buf), "\n\n")
+	log.Printf("Got %v addresses from %v", len(addresses), filename)
+
+	p := fpdf.NewCustom(&fpdf.InitType{
+		UnitStr: "mm",
+		Size:    fpdf.SizeType{Wd: widthMM, Ht: heightMM},
+	})
+	p.AddPage()
+	p.AddFontFromBytes(font1Family, "", BalsamiqSansRegularJSON, BalsamiqSansRegularZ)
+	p.SetAutoPageBreak(false, 0)
+	p.SetTextColor(0, 0, 0)
+	p.SetFont(font1Family, "", 10)
+	_, lineHeight1 := p.GetFontSize()
+
+	for i, label := range addresses {
+		nx, ny := i%numLabelsX, i/numLabelsX
+		x := pdfMarginMM + float64(nx)*widthMM/numLabelsX
+		y := float64(ny) * (heightMM - pdfMarginMM) / numLabelsY
+		lines := strings.Split(label, "\n")
+		for j, line := range lines {
+			p.SetXY(x, y+(lineHeight1+1.0)*float64(j))
+			// log.Printf("(%v,%v)(%v,%v): %q", nx, ny, x, y, line)
+			p.CellFormat(1, lineHeight1+10.0, line, "", 2, "AL", false, 0, "")
+		}
+	}
+
+	pdfFilename := filepath.Join(filepath.Dir(filename), filepath.Base(filename)+".pdf")
+	must(p.OutputFileAndClose(pdfFilename))
+	log.Printf("Wrote %v", pdfFilename)
+}
+
+func must(err error) {
+	if err != nil {
+		log.Fatal(err)
+	}
+}