}
	if d.cb == cbInvalid {
		return UnsupportedError(fmt.Sprintf("bit depth %d, color type %d", d.tmp[8], d.tmp[9]))
	}
	d.width, d.height = int(w), int(h)
	return d.verifyChecksum()
}

func (d *decoder) parsePLTE(length uint32) error {
	np := int(length / 3) // The number of palette entries.
	if length%3 != 0 || np <= 0 || np > 256 || np > 1<<uint(d.depth) {
		return FormatError("bad PLTE length")
	}