Creates a PostScript calculator function.
public PdfPostScriptFunction CreatePostScriptFunction(ReadOnlySpan<double> domain, ReadOnlySpan<double> range, string program)
The inputs' ranges: a minimum and a maximum per input.
The outputs' ranges: a minimum and a maximum per output.
The program, in braces, such as { 1 exch sub }; it uses only the operators Table 42 lists.
<< /FunctionType 4 /Domain [...] /Range [...] >> holding the program.ISO 32000-2 §7.10.5, Tables 41 and 42 (PDF 1.3). The program is compiled before the object is added. Records PDF 1.3. A mutation.