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

[varLib] Build MVAR table

Browse Source 
Does not implement gasp table variations, but the rest should work.
This commit is contained in:
Behdad Esfahbod 2017-04-10 21:01:00 +02:00
parent d8a9ca6db4
commit 8c62165008
1 changed files with 91 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

92
Lib/fontTools/varLib/__init__.py
View File

@ -28,7 +28,7 @@ from fontTools.ttLib.tables._g_l_y_f import GlyphCoordinates
from fontTools.ttLib.tables._g_v_a_r import TupleVariation
from fontTools.ttLib.tables import otTables as ot
from fontTools.varLib import builder, designspace, models
from fontTools.varLib.merger import VariationMerger
from fontTools.varLib.merger import VariationMerger, _all_equal
from collections import OrderedDict
import warnings
import os.path
@ -243,6 +243,95 @@ def _add_HVAR(font, model, master_ttfs, axisTags):
hvar.AdvWidthMap = advanceMapping
hvar.LsbMap = hvar.RsbMap = None
_MVAR_entries = {
'hasc': ('OS/2', 'sTypoAscender'), # horizontal ascender
'hdsc': ('OS/2', 'sTypoDescender'), # horizontal descender
'hlgp': ('OS/2', 'sTypoLineGap'), # horizontal line gap
'hcla': ('OS/2', 'usWinAscent'), # horizontal clipping ascent
'hcld': ('OS/2', 'usWinDescent'), # horizontal clipping descent
'vasc': ('vhea', 'ascent'), # vertical ascender
'vdsc': ('vhea', 'descent'), # vertical descender
'vlgp': ('vhea', 'lineGap'), # vertical line gap
'hcrs': ('hhea', 'caretSlopeRise'), # horizontal caret rise
'hcrn': ('hhea', 'caretSlopeRun'), # horizontal caret run
'hcof': ('hhea', 'caretOffset'), # horizontal caret offset
'vcrs': ('vhea', 'caretSlopeRise'), # vertical caret rise
'vcrn': ('vhea', 'caretSlopeRun'), # vertical caret run
'vcof': ('vhea', 'caretOffset'), # vertical caret offset
'xhgt': ('OS/2', 'sxHeight'), # x height
'cpht': ('OS/2', 'sCapHeight'), # cap height
'sbxs': ('OS/2', 'ySubscriptXSize'), # subscript em x size
'sbys': ('OS/2', 'ySubscriptYSize'), # subscript em y size
'sbxo': ('OS/2', 'ySubscriptXOffset'), # subscript em x offset
'sbyo': ('OS/2', 'ySubscriptYOffset'), # subscript em y offset
'spxs': ('OS/2', 'ySuperscriptXSize'), # superscript em x size
'spys': ('OS/2', 'ySuperscriptYSize'), # superscript em y size
'spxo': ('OS/2', 'ySuperscriptXOffset'), # superscript em x offset
'spyo': ('OS/2', 'ySuperscriptYOffset'), # superscript em y offset
'strs': ('OS/2', 'yStrikeoutSize'), # strikeout size
'stro': ('OS/2', 'yStrikeoutPosition'), # strikeout offset
'unds': ('post', 'underlineThickness'), # underline size
'undo': ('post', 'underlinePosition'), # underline offset
#'gsp0': ('gasp', 'gaspRange[0].rangeMaxPPEM'), # gaspRange[0]
#'gsp1': ('gasp', 'gaspRange[1].rangeMaxPPEM'), # gaspRange[1]
#'gsp2': ('gasp', 'gaspRange[2].rangeMaxPPEM'), # gaspRange[2]
#'gsp3': ('gasp', 'gaspRange[3].rangeMaxPPEM'), # gaspRange[3]
#'gsp4': ('gasp', 'gaspRange[4].rangeMaxPPEM'), # gaspRange[4]
#'gsp5': ('gasp', 'gaspRange[5].rangeMaxPPEM'), # gaspRange[5]
#'gsp6': ('gasp', 'gaspRange[6].rangeMaxPPEM'), # gaspRange[6]
#'gsp7': ('gasp', 'gaspRange[7].rangeMaxPPEM'), # gaspRange[7]
#'gsp8': ('gasp', 'gaspRange[8].rangeMaxPPEM'), # gaspRange[8]
#'gsp9': ('gasp', 'gaspRange[9].rangeMaxPPEM'), # gaspRange[9]
}
def _add_MVAR(font, model, master_ttfs, axisTags):
log.info("Generating MVAR")
store_builder = builder.OnlineVarStoreBuilder(axisTags)
store_builder.setModel(model)
records = []
lastTableTag = None
fontTable = None
tables = None
for tag, (tableTag, itemName) in sorted(_MVAR_entries.items(), key=lambda kv: kv[1]):
if tableTag != lastTableTag:
tables = fontTable = None
if tableTag in font:
# TODO Check all masters have same table set?
fontTable = font[tableTag]
tables = [master[tableTag] for master in master_ttfs]
lastTableTag = tableTag
if tables is None:
continue
# TODO support gasp entries
master_values = [getattr(table, itemName) for table in tables]
if _all_equal(master_values):
base, varIdx = master_values[0], None
else:
base, varIdx = store_builder.storeMasters(master_values)
setattr(fontTable, itemName, base)
if varIdx is None:
continue
log.info(' %s: %s.%s %s', tag, tableTag, itemName, master_values)
rec = ot.MetricsValueRecord()
rec.ValueTag = tag
rec.VarIdx = varIdx
records.append(rec)
assert "MVAR" not in font
MVAR = font["MVAR"] = newTable('MVAR')
mvar = MVAR.table = ot.MVAR()
mvar.Version = 0x00010000
mvar.Reserved = 0
mvar.VarStore = store_builder.finish()
mvar.ValueRecord = sorted(records, key=lambda r: r.ValueTag)
def _merge_OTL(font, model, master_fonts, axisTags, base_idx):
@ -381,6 +470,7 @@ def build(designspace_filename, master_finder=lambda s:s, axisMap=None):
assert 0 == model.mapping[base_idx]
log.info("Building variations tables")
_add_MVAR(gx, model, master_fonts, axisTags)
if 'glyf' in gx:
_add_gvar(gx, model, master_fonts)
_add_HVAR(gx, model, master_fonts, axisTags)