=> R0 = font handle
R1 = pointer to buffer
R2 = length of buffer
<= R0 = pointer to encoding filename (in buffer)
R1 = pointer to terminating 0 in buffer
R2 = free bytes in buffer
This SWI returns the filename of the encoding file, primarily of use to PDriverPS. The font manager only uses public encoding files with names of the form
font_prefix.Encodings.encoding
PDriverPS uses the private encoding files with names of the form
font_prefix.font_name.Encoding
to find the PostScript names of the font's characters.
See PRM 3, page 491.
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