def CompareDirs(font1, font2):
"""Compares fonts by assuming font1/2 are dirs containing METADATA.pb."""
m1 = fonts.Metadata(font1)
m2 = fonts.Metadata(font2)
subsets_to_compare = fonts.UniqueSort(m1.subsets, m2.subsets)
subsets_to_compare.remove('menu')
subsets_to_compare.append('all')
font_filename1 = os.path.join(font1, fonts.RegularWeight(m1))
font_filename2 = os.path.join(font2, fonts.RegularWeight(m2))
if FLAGS.diff_coverage:
print 'Subset Coverage Change (codepoints)'
for subset in subsets_to_compare:
DiffCoverage(font_filename1, font_filename2, subset)
print CompareSize(font_filename1, font_filename2)
def DiffTables(font_filename1, font_filename2):
"""Prints a table-by-table size comparison of two fonts.
Args:
font_filename1: The first font to compare.
font_filename2: The second font to compare.
Returns:
String describing size difference. One line per unique table in either font.
"""
result = [' Table Changes Delta-Bytes(from=>to) % Change']
result.append(' -------------------------------------------------')
sfnt1 = sfnt.SFNTReader(open(font_filename1))
sfnt2 = sfnt.SFNTReader(open(font_filename2))
font_sz1 = os.stat(font_filename1).st_size
sum_tables1 = 0
sum_tables2 = 0
table_l1_l2s = []
for t in fonts.UniqueSort(sfnt1.tables, sfnt2.tables, _KNOWN_TABLES):
table1_sz = sfnt1.tables[t].length if t in sfnt1 else 0
table2_sz = sfnt2.tables[t].length if t in sfnt2 else 0
sum_tables1 += table1_sz
sum_tables2 += table2_sz
table_l1_l2s.append((t, table1_sz, table2_sz))
for (table, table1_sz, table2_sz) in table_l1_l2s:
delta_pct = float(table2_sz - table1_sz) / font_sz1 * 100
result.append(
' %s %+6d %06d => %06d %+10.1f%%' %
(table, table2_sz - table1_sz, table1_sz, table2_sz, delta_pct))
delta_pct = float(sum_tables2 - sum_tables1) / font_sz1 * 100
result.append(
' TOTAL %+6d %06d => %06d %+10.1f%%' %
(sum_tables2 - sum_tables1, sum_tables1, sum_tables2, delta_pct))
return '\n'.join(result)