rewrite

assets/scripts/utils/ttc2ttf.py

@@ -0,0 +1,68 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+#First released as C++ program by Hiroyuki Tsutsumi as part of the free software suite “Beer”
+#I thought porting it to Python could be both a challenge and useful
+
+from sys import argv, exit, getsizeof
+from struct import pack_into, unpack_from
+
+def ceil4(n):
+	"""returns the next integer which is a multiple of 4"""
+	return (n + 3) & ~3
+
+if len(argv)!=2:
+	print("Usage: %s FontCollection.ttc" % argv)
+	exit(2)
+
+filename = argv[1]
+in_file = open(filename, "rb")
+buf     = in_file.read()
+in_file.close()
+
+if filename.lower().endswith(".ttc"):
+	filename = filename[:-4]
+
+
+if buf[:4] != b"ttcf":
+	out_filename = "%s.ttf" % filename
+	out_file = open(out_filename, "wb")
+	out_file.write(buf)
+	#end, so we don’t have to close the files or call exit() here
+else:
+	ttf_count        = unpack_from("!L", buf, 0x08)[0]
+	print("Anzahl enthaltener TTF-Dateien: %s" % ttf_count)
+	ttf_offset_array = unpack_from("!"+ttf_count*"L", buf, 0x0C)
+	for i in range(ttf_count):
+		print("Extrahiere TTF #%s:" % (i+1))
+		table_header_offset = ttf_offset_array[i]
+		print("\tHeader beginnt bei Byte %s" % table_header_offset)
+		table_count =  unpack_from("!H", buf, table_header_offset+0x04)[0]
+		header_length = 0x0C + table_count * 0x10
+		print("\tHeaderlänge: %s Byte" % header_length)
+		
+		table_length = 0
+		for j in range(table_count):
+			length = unpack_from("!L", buf, table_header_offset+0x0C+0x0C+j*0x10)[0]
+			table_length += ceil4(length)
+		
+		total_length = header_length + table_length
+		new_buf = bytearray(total_length)
+		header = unpack_from(header_length*"c", buf, table_header_offset)
+		pack_into(header_length*"c", new_buf, 0, *header)
+		current_offset = header_length
+		
+		for j in range(table_count):
+			offset = unpack_from("!L", buf, table_header_offset+0x0C+0x08+j*0x10)[0]
+			length = unpack_from("!L", buf, table_header_offset+0x0C+0x0C+j*0x10)[0]
+			pack_into("!L", new_buf, 0x0C+0x08+j*0x10, current_offset)
+			current_table = unpack_from(length*"c", buf, offset)
+			pack_into(length*"c", new_buf, current_offset, *current_table)
+			
+			#table_checksum = sum(unpack_from("!"+("L"*length), new_buf, current_offset))
+			#pack_into("!L", new_buf, 0x0C+0x04+j*0x10, table_checksum)
+			
+			current_offset += ceil4(length)
+		
+		out_file = open("%s%d.ttf"%(filename, i), "wb")
+		out_file.write(new_buf)