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the gasp portion of patch 1675210: support for ClearType

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git-svn-id: svn://svn.code.sf.net/p/fonttools/code/trunk@529 4cde692c-a291-49d1-8350-778aa11640f8
This commit is contained in:
jvr 2008-03-01 16:43:24 +00:00
parent 212ea14706
commit b018bf7120
1 changed files with 8 additions and 2 deletions
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10
Lib/fontTools/ttLib/tables/_g_a_s_p.py
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@ -3,6 +3,8 @@ import struct
from fontTools.misc.textTools import safeEval from fontTools.misc.textTools import safeEval
GASP_SYMMETRIC_GRIDFIT = 0x0008
GASP_SYMMETRIC_SMOOTHING = 0x0004
GASP_DOGRAY = 0x0002 GASP_DOGRAY = 0x0002
GASP_GRIDFIT = 0x0001 GASP_GRIDFIT = 0x0001
@ -10,7 +12,7 @@ class table__g_a_s_p(DefaultTable.DefaultTable):
def decompile(self, data, ttFont): def decompile(self, data, ttFont):
self.version, numRanges = struct.unpack(">HH", data[:4]) self.version, numRanges = struct.unpack(">HH", data[:4])
assert self.version == 0, "unknown 'gasp' format: %s" % self.version assert 0 <= self.version <= 1, "unknown 'gasp' format: %s" % self.version
data = data[4:] data = data[4:]
self.gaspRange = {} self.gaspRange = {}
for i in range(numRanges): for i in range(numRanges):
@ -20,12 +22,16 @@ class table__g_a_s_p(DefaultTable.DefaultTable):
assert not data, "too much data" assert not data, "too much data"
def compile(self, ttFont): def compile(self, ttFont):
version = 0 # ignore self.version
numRanges = len(self.gaspRange) numRanges = len(self.gaspRange)
data = struct.pack(">HH", 0, numRanges) data = []
items = self.gaspRange.items() items = self.gaspRange.items()
items.sort() items.sort()
for rangeMaxPPEM, rangeGaspBehavior in items: for rangeMaxPPEM, rangeGaspBehavior in items:
data = data + struct.pack(">HH", rangeMaxPPEM, rangeGaspBehavior) data = data + struct.pack(">HH", rangeMaxPPEM, rangeGaspBehavior)
if rangeGaspBehavior & ~(GASP_GRIDFIT | GASP_DOGRAY):
version = 1
data = struct.pack(">HH", version, numRanges) + data
return data return data
def toXML(self, writer, ttFont): def toXML(self, writer, ttFont):