Text Rendering issue

[maa3x]

Description

I’m attempting to create a searchable PDF using your package. I have PDF files containing scanned books and their OCR data. However, the output PDF file contains ???? instead of the actual content.

Steps to Reproduce

func MakeSearchablePDF(src, dst string, pages []*models.OCRPage) error {
	data, err := os.ReadFile(src)
	if err != nil {
		return errz.E("read source PDF file", err)
	}
	fontData, err := os.ReadFile("/Users/matrix/Downloads/Noto_Naskh_Arabic/static/NotoNaskhArabic-Regular.ttf")
	if err != nil {
		return errz.E("read font file", err)
	}

	doc, err := gpdf.Open(data, template.WithFont("NotoNaskhArabic", fontData))
	if err != nil {
		return errz.E("open PDF document", err)
	}

	for i := range pages {
		err := doc.Overlay(i, func(pb *template.PageBuilder) {
			fmt.Println("Putting tokens on page", i)
			for _, b := range pages[i].Blocks {
				for _, l := range b.Lines {
					for _, t := range l.Tokens {
						x := float64(t.BoundingBox.X1+t.BoundingBox.X2) / 2 * 100
						y := float64(t.BoundingBox.Y2+t.BoundingBox.Y1) / 2 * 100
						pb.Absolute(document.Pct(x), document.Pct(y), func(cb *template.ColBuilder) {
							cb.Text(t.Content, template.FontFamily("NotoNaskhArabic"))
						})
					}
				}
			}
		})
		if err != nil {
			return errz.F("set overlay on page %d: %w", i, err)
		}
	}

	data, err = doc.Save()
	if err != nil {
		return errz.E("export searchable PDF document", err)
	}
	if err := os.WriteFile(dst, data, 0o644); err != nil {
		return errz.E("write searchable PDF file", err)
	}
	return nil
}

Expected Behavior

Content Rendered as overlay on the pages.

Actual Behavior

?????

Go Version

go version go1.26.5 darwin/arm64

gpdf Version

v1.0.11

PDF Viewer (if relevant)

No response