def get_charset_info(charset):
"""Returns an encoding of the charset as pairs of lengths of runs of chars to skip and
chars to include. Each length is written as length - 1 in hex-- except when length ==
1, which is written as the empty string-- and separated from the next length by a comma.
Thus successive commas indicate a length of 1, a 1 indicates a length of 2, and so on.
Since the minimum representable length is 1, the base is -1 so that the first run (a
skip) of 1 can be output as a comma to then start the first included character at 0 if
need be. Only as many pairs of values as are needed to encode the last run of included
characters."""
ranges = coverage.convert_set_to_ranges(charset)
prev = -1
range_list = []
for start, end in ranges:
range_len = start - 1 - prev
if range_len > 0:
range_list.append('%x' % range_len)
else:
range_list.append('')
range_len = end - start
if range_len > 0:
range_list.append('%x' % range_len)
else:
range_list.append('')
prev = end + 1
return ','.join(range_list)
def get_charset_info(charset):
"""Returns an encoding of the charset as pairs of lengths of runs of chars
to skip and chars to include. Each length is written as length - 1 in
hex-- except when length == 1, which is written as the empty string-- and
separated from the next length by a comma. Thus successive commas
indicate a length of 1, a 1 indicates a length of 2, and so on. Since
the minimum representable length is 1, the base is -1 so that the first
run (a skip) of 1 can be output as a comma to then start the first
included character at 0 if need be. Only as many pairs of values as are
needed to encode the last run of included characters."""
ranges = coverage.convert_set_to_ranges(charset)
prev = -1
range_list = []
for start, end in ranges:
range_len = start - 1 - prev
if range_len > 0:
range_list.append('%x' % range_len)
else:
range_list.append('')
range_len = end - start
if range_len > 0:
range_list.append('%x' % range_len)
else:
range_list.append('')
prev = end + 1
return ','.join(range_list)
def charset_to_ranges(font_charset):
# Ignore basic common characters
charset = font_charset - {0x00, 0x0D, 0x20, 0xA0, 0xFEFF}
ranges = coverage.convert_set_to_ranges(charset)
output_list = []
for start, end in ranges:
output_list.append(('%04X' % start, '%04X' % end))
return output_list
def charset_to_ranges(font_charset):
# Ignore basic common characters
charset = font_charset - {0x00, 0x0D, 0x20, 0xA0, 0xFEFF}
ranges = coverage.convert_set_to_ranges(charset)
output_list = []
for start, end in ranges:
output_list.append(('%04X' % start, '%04X' % end))
return output_list
