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pdf: Simplify Type 3 font character encoding #30520

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Merged
merged 1 commit into from
Sep 8, 2025
+9 −7
Merged

pdf: Simplify Type 3 font character encoding #30520

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16 changes: 9 additions & 7 deletions lib/matplotlib/backends/backend_pdf.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1180,13 +1180,11 @@ def embedTTFType3(font, characters, descriptor):
'Widths': widthsObject
}

from encodings import cp1252

# Make the "Widths" array
def get_char_width(charcode):
s = ord(cp1252.decoding_table[charcode])
width = font.load_char(
s, flags=LoadFlags.NO_SCALE | LoadFlags.NO_HINTING).horiAdvance
charcode,
flags=LoadFlags.NO_SCALE | LoadFlags.NO_HINTING).horiAdvance
return cvt(width)
with warnings.catch_warnings():
# Ignore 'Required glyph missing from current font' warning
Expand Down Expand Up @@ -2331,9 +2329,13 @@ def draw_tex(self, gc, x, y, s, prop, angle, *, mtext=None):
self.draw_path(boxgc, path, mytrans, gc._rgb)

def encode_string(self, s, fonttype):
if fonttype in (1, 3):
return s.encode('cp1252', 'replace')
return s.encode('utf-16be', 'replace')
match fonttype:
case 1:
return s.encode('cp1252', 'replace')
case 3:
return s.encode('latin-1', 'replace')
case _:
return s.encode('utf-16be', 'replace')

def draw_text(self, gc, x, y, s, prop, angle, ismath=False, mtext=None):
# docstring inherited
Expand Down
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