def _get_ps_font_and_encoding(texname):
tex_font_map = dviread.PsfontsMap(dviread.find_tex_file('pdftex.map'))
font_bunch = tex_font_map[texname]
if font_bunch.filename is None:
raise ValueError(
f"No usable font file found for {font_bunch.psname} "
f"({texname}). The font may lack a Type-1 version.")
font = get_font(font_bunch.filename)
if font_bunch.encoding:
# If psfonts.map specifies an encoding, use it: it gives us a
# mapping of glyph indices to Adobe glyph names; use it to convert
# dvi indices to glyph names and use the FreeType-synthesized
# unicode charmap to convert glyph names to glyph indices (with
# FT_Get_Name_Index/get_name_index), and load the glyph using
# FT_Load_Glyph/load_glyph. (That charmap has a coverage at least
# as good as, and possibly better than, the native charmaps.)
enc = dviread._parse_enc(font_bunch.encoding)
else:
# If psfonts.map specifies no encoding, the indices directly
# map to the font's "native" charmap; so don't use the
# FreeType-synthesized charmap but the native ones (we can't
# directly identify it but it's typically an Adobe charmap), and
# directly load the dvi glyph indices using FT_Load_Char/load_char.
for charmap_name, charmap_code in [
("ADOBE_CUSTOM", 1094992451),
("ADOBE_STANDARD", 1094995778),
]:
try:
font.select_charmap(charmap_code)
except (ValueError, RuntimeError):
pass
else:
break
else:
charmap_name = ""
_log.warning("No supported encoding in font (%s).",
font_bunch.filename)
enc = None
return font, enc
def _get_ps_font_and_encoding(texname):
tex_font_map = dviread.PsfontsMap(dviread.find_tex_file('pdftex.map'))
font_bunch = tex_font_map[texname]
if font_bunch.filename is None:
raise ValueError(
f"No usable font file found for {font_bunch.psname} "
f"({texname}). The font may lack a Type-1 version.")
font = get_font(font_bunch.filename)
if font_bunch.encoding:
# If psfonts.map specifies an encoding, use it: it gives us a
# mapping of glyph indices to Adobe glyph names; use it to convert
# dvi indices to glyph names and use the FreeType-synthesized
# unicode charmap to convert glyph names to glyph indices (with
# FT_Get_Name_Index/get_name_index), and load the glyph using
# FT_Load_Glyph/load_glyph. (That charmap has a coverage at least
# as good as, and possibly better than, the native charmaps.)
enc = dviread._parse_enc(font_bunch.encoding)
else:
# If psfonts.map specifies no encoding, the indices directly
# map to the font's "native" charmap; so don't use the
# FreeType-synthesized charmap but the native ones (we can't
# directly identify it but it's typically an Adobe charmap), and
# directly load the dvi glyph indices using FT_Load_Char/load_char.
for charmap_code in [
1094992451, # ADOBE_CUSTOM.
1094995778, # ADOBE_STANDARD.
]:
try:
font.select_charmap(charmap_code)
except (ValueError, RuntimeError):
pass
else:
break
else:
_log.warning("No supported encoding in font (%s).",
font_bunch.filename)
enc = None
return font, enc
