func (dw *DocWriter) fontKey(f *Font, cpi codepage.CodepageIndex) string {
if f == nil {
panic("fontKey: No font specified.")
}
if f.metrics == nil {
panic("fontKey: font missing metrics.")
}
name := fmt.Sprintf("%s/%s-%s", f.metrics.PostScriptName(), cpi, f.subType)
if key, ok := dw.fontKeys[name]; ok {
return key
}
descriptor := newFontDescriptor(
dw.nextSeq(), 0,
f.metrics.PostScriptName(), f.metrics.Family(),
f.metrics.Flags(),
f.metrics.BoundingBox(),
0, // missingWidth
f.metrics.StemV(),
0, // stemH
f.metrics.ItalicAngle(),
f.metrics.CapHeight(),
f.metrics.XHeight(),
f.metrics.Ascent(),
f.metrics.Descent(),
f.metrics.Leading(),
0, 0) // maxWidth, avgWidth
dw.file.body.add(descriptor)
key := fmt.Sprintf("F%d", len(dw.fontKeys))
dw.fontKeys[name] = key
widths := dw.widthsForFontCodepage(f, cpi)
dw.file.body.add(widths)
var font *simpleFont
switch f.subType {
case "Type1":
encoding, ok := dw.fontEncodings[cpi.String()]
if !ok {
differences := glyphDiffs(codepage.Idx_CP1252, cpi, 32, 255)
encoding = newFontEncoding(dw.nextSeq(), 0, "WinAnsiEncoding", differences)
dw.file.body.add(encoding)
dw.fontEncodings[cpi.String()] = encoding
}
font = newType1Font(
dw.nextSeq(), 0,
f.metrics.PostScriptName(),
32, 255, widths,
descriptor, &indirectObjectRef{encoding})
case "TrueType":
font = newTrueTypeFont(
dw.nextSeq(), 0,
f.metrics.PostScriptName(),
32, 255, widths,
descriptor)
}
dw.file.body.add(font)
dw.resources.fonts[key] = &indirectObjectRef{font}
return key
}
