func (dw *DocWriter) widthsForFontCodepage(f *font.Font, cpi codepage.CodepageIndex) *indirectObject { var widths [256]int upm := f.UnitsPerEm() // Avoid divide by zero error for unusual fonts. if upm > 0 { for i, r := range cpi.Map() { designWidth, _ := f.AdvanceWidth(r) widths[i] = designWidth * 1000 / upm } } pdfWidths := arrayFromInts(widths[32:]) ioWidths := &indirectObject{dw.nextSeq(), 0, &pdfWidths} return ioWidths }