shadowfacts/fonttools
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

[kern] Speed up decompiling by 4x

Browse Source 
Mostly by not creating a new object in the hot loop.
This commit is contained in:
Behdad Esfahbod 2015-05-27 16:03:22 -07:00
parent e6f5ba6e9c
commit 4860a88243
1 changed files with 3 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
Lib/fontTools/ttLib/tables/_k_e_r_n.py
View File

@ -102,16 +102,10 @@ class KernTable_format_0(object):
nPairs, searchRange, entrySelector, rangeShift = struct.unpack(">HHHH", data[:8])
data = data[8:]
for k in range(nPairs):
if len(data) < 6:
# buggy kern table
data = b""
break
left, right, value = struct.unpack(">HHh", data[:6])
data = data[6:]
left, right = int(left), int(right)
for k in range(min(nPairs, len(data) // 6)):
left, right, value = struct.unpack(">HHh", data[6*k:6*k+6])
kernTable[(ttFont.getGlyphName(left), ttFont.getGlyphName(right))] = value
if len(data):
if len(data) > 6 * nPairs:
warnings.warn("excess data in 'kern' subtable: %d bytes" % len(data))
def compile(self, ttFont):