--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mupdf-source/scripts/makesubset.py	Mon Sep 15 11:43:07 2025 +0200
@@ -0,0 +1,76 @@
+#!/usr/bin/env python3
+
+# Convert MES-2 (or WGL4) character set to list of glyphs for font subsetting.
+# Also add small-caps glyph names for small letters and ligatures.
+
+import sys
+
+glyphs = {}
+for line in open("scripts/glyphlist.txt").readlines():
+	if len(line) > 0 and line[0] != '#':
+		n, u = line.rstrip().split(';')
+		if len(u) == 4:
+			u = int(u, base=16)
+			if u >= 0x0000 and u <= 0x001F: continue	# control block 1
+			if u >= 0x007F and u <= 0x009F: continue	# control block 2
+			if u >= 0x2500 and u <= 0x25FF: continue	# Box Drawing, Block Elements, Geometric Shapes
+			if u not in glyphs:
+				glyphs[u] = [n]
+			else:
+				glyphs[u].append(n)
+
+# Ligatures are mapped to 'fi' and 'fl'; we also want them using the 'f_i' convention.
+
+table = {}
+do_small = False
+
+def load_table(fn):
+	for line in open(fn).readlines():
+		is_small = ('SMALL LETTER' in line) or ('SMALL LIGATURE' in line)
+		u = int(line.split()[0], 16)
+		if u in glyphs:
+			for n in glyphs[u]:
+				table[n] = u
+				if do_small and is_small:
+					table[n+'.sc'] = u
+		if u >= 128:
+			table['uni%04X'%u] = u
+			if do_small and is_small:
+				table['uni%04X.sc'%u] = u
+
+def load_ligs():
+	table['ff'] = 0xFB00
+	table['fi'] = 0xFB01
+	table['fl'] = 0xFB02
+	table['ffi'] = 0xFB03
+	table['ffl'] = 0xFB04
+	if do_small:
+		table['f_f.sc'] = 0xFB00
+		table['f_i.sc'] = 0xFB01
+		table['f_l.sc'] = 0xFB02
+		table['f_f_i.sc'] = 0xFB03
+		table['f_f_l.sc'] = 0xFB04
+
+if len(sys.argv) < 2:
+	print('usage: python3 scripts/makesubset.py scripts/MES-2.TXT', file=sys.stderr)
+else:
+	for input in sys.argv[1:]:
+		if input == '-sc':
+			do_small = True
+		elif input == '-lig':
+			load_ligs()
+		else:
+			load_table(input)
+
+	if len(sys.argv) > 2 and sys.argv[2] == '-scdump':
+		smcp = []
+		for n in list(table.keys()):
+			u = table[n]
+			if u > 0 and n.endswith('.sc') and not n.startswith('uni'):
+				smcp.append('{0x%04X, "%s"},' % (u,n))
+		smcp.sort()
+		print('\n\t'.join(smcp))
+	else:
+		list = list(table.keys())
+		list.sort()
+		print(','.join(list))