def __init__(self, path):
self.doc_ = ast.VoltFile()
self.glyphs_ = OrderedSymbolTable()
self.groups_ = SymbolTable()
self.anchors_ = {} # dictionary of SymbolTable() keyed by glyph
self.scripts_ = SymbolTable()
self.langs_ = SymbolTable()
self.lookups_ = SymbolTable()
self.next_token_type_, self.next_token_ = (None, None)
self.next_token_location_ = None
self.make_lexer_(path)
self.advance_lexer_()
def exportVoltAnchors(font):
glyphOrder = [g.name for g in font]
# Save groups and lookups files for each master.
for master in font.masters:
# Collect anchors that need mkmk lookups (base glyph is a mark).
mkmk = set()
for glyph in font:
layer = glyph.layers[master.name]
for anchor in layer.anchors:
name = anchor.name
if not name.startswith('_') and glyph.openTypeGlyphClass == 3:
mkmk.add(name.split('_')[0])
# Collect anchors that need ligature lookups (anchor with index).
ligs = set()
for glyph in font:
layer = glyph.layers[master.name]
for anchor in layer.anchors:
name = anchor.name
if name.startswith('_'):
name = name[1:]
if '_' in name:
ligs.add(name.split('_')[0])
lookups = {}
groups = {}
anchors = []
for glyph in font:
layer = glyph.layers[master.name]
for anchor in layer.anchors:
x = otRound(anchor.x)
y = otRound(anchor.y)
if anchor.name.startswith('_'):
# Mark anchor.
if glyph.openTypeGlyphClass != 3:
# Not a mark glyph? Ignore the anchor or VOLT will error.
continue
name = anchor.name[1:]
# Add to groups. We build groups for mark glyphs by anchor.
group = f'MARK_{name}'
if group not in groups:
groups[group] = set()
groups[group].add(glyph.name)
# mkmk anchors are added to both mark and mkmk lookups
# because they might be used with non-mark bases after
# anchor propagation.
lookupnames = [f'mark_{name}']
if name in mkmk:
lookupnames.append(f'mkmk_{name}')
if name in ligs:
lookupnames.append(f'mark_{name}_ligs')
# Add the glyph to respective lookup(s).
for lookupname in lookupnames:
if lookupname not in lookups:
lookups[lookupname] = _attachment_lookup(
lookupname)
# For mkmk lookups we use individual glyphs, for mark
# lookups we use groups. There is no technical reason
# for this, just how JH likes it.
if lookupname.startswith('mkmk'):
to = ([ast.GlyphName(glyph.name)], name)
lookups[lookupname].pos.coverage_to.append(to)
elif not lookups[lookupname].pos.coverage_to:
to = ([ast.GroupName(group, None)], name)
lookups[lookupname].pos.coverage_to.append(to)
# Add the anchor.
name, comp = f'MARK_{name}', 1
pos = ast.Pos(None, x, y, {}, {}, {})
gid = glyphOrder.index(glyph.name)
anchors.append(
ast.AnchorDefinition(name, gid, glyph.name, comp,
False, pos))
else:
# Base anchor.
name, comp = anchor.name, 1
lookupname = f'mark_{name}'
if '_' in name:
# Split ligature anchor (e.g. “top_1” and use the
# number for ligature component.
name, comp = name.split('_')
lookupname = f'mark_{name}_ligs'
if glyph.openTypeGlyphClass == 3:
# If this is a mark glyph, then add to mkmk lookup.
lookupname = f'mkmk_{name}'
# Add the glyph to respective lookup.
if lookupname not in lookups:
lookups[lookupname] = _attachment_lookup(lookupname)
lookups[lookupname].pos.coverage.add(glyph.name)
# Add the anchor.
pos = ast.Pos(None, x, y, {}, {}, {})
gid = glyphOrder.index(glyph.name)
anchors.append(
ast.AnchorDefinition(name, gid, glyph.name, comp,
False, pos))
# Save groups file.
with open(master.psn + '-anchors.vtg', 'w') as fp:
doc = ast.VoltFile()
for group in groups:
glyphs = tuple(ast.GlyphName(g) for g in sorted(groups[group]))
enum = ast.Enum(glyphs)
doc.statements.append(ast.GroupDefinition(group, enum))
fp.write(str(doc))
# Save lookups file.
with open(master.psn + '-anchors.vtl', 'w') as fp:
doc = ast.VoltFile()
for lookup in lookups.values():
# Sort coverage by glyph ID to be stable.
lookup.pos.coverage = sorted(
[ast.GlyphName(g) for g in lookup.pos.coverage],
key=lambda g: glyphOrder.index(g.glyph),
)
doc.statements.append(lookup)
doc.statements += anchors
fp.write(str(doc))
def exportVoltKerning(font):
# Save groups and lookups files for each master.
for master in font.masters:
classes = {k.name: k.names for k in master.kerning.classes}
pairs = master.kerning.pairs.copy()
format1 = _pair_lookup(r'kern\1_PPF1')
format2 = _pair_lookup(r'kern\2_PPF2')
nullpos = ast.Pos(None, None, None, {}, {}, {})
# Left exceptions
filtered = {}
for left in pairs:
if left.startswith('@'):
names = []
for name in classes[left[1:]]:
if name in pairs:
pairs[name] = {**pairs[left], **pairs[name]}
else:
names.append(name)
filtered[left[1:]] = names
# Right exceptions
rights = set()
for left in pairs:
rights.update(pairs[left])
for right in sorted(rights):
if right.startswith('@'):
names = []
for name in classes[right[1:]]:
if name in rights:
for left in pairs:
if right in pairs[left]:
pairs[left][name] = pairs[left][right]
else:
names.append(name)
filtered[right[1:]] = names
groups = set()
values = {}
for left in pairs:
for right, value in pairs[left].items():
lookup = format1
if left.startswith('@') and right.startswith('@'):
lookup = format2
groups.update([left[1:], right[1:]])
else:
if left.startswith('@') and not filtered[left[1:]]:
continue
if right.startswith('@') and not filtered[right[1:]]:
continue
if left not in lookup.pos.coverages_1:
lookup.pos.coverages_1.append(left)
id1 = lookup.pos.coverages_1.index(left) + 1
if right not in lookup.pos.coverages_2:
lookup.pos.coverages_2.append(right)
id2 = lookup.pos.coverages_2.index(right) + 1
pos = ast.Pos(otRound(float(value)), None, None, {}, {}, {})
lookup.pos.adjust_pair[(id1, id2)] = (pos, nullpos)
_warn_overlapping_classes(master, groups)
# Save groups file.
with open(master.psn + '-kerning.vtg', 'w') as fp:
doc = ast.VoltFile()
for name in sorted(groups):
glyphs = tuple(ast.GlyphName(g) for g in sorted(classes[name]))
enum = ast.Enum(glyphs)
doc.statements.append(ast.GroupDefinition(f'KERN{name}', enum))
fp.write(str(doc))
# Save lookups file.
with open(master.psn + '-kerning.vtl', 'w') as fp:
format1.pos.coverages_1 = _kern_coverage(format1.pos.coverages_1,
filtered)
format1.pos.coverages_2 = _kern_coverage(format1.pos.coverages_2,
filtered)
format2.pos.coverages_1 = _kern_coverage(format2.pos.coverages_1)
format2.pos.coverages_2 = _kern_coverage(format2.pos.coverages_2)
doc = ast.VoltFile()
doc.statements = [format1, format2]
fp.write(str(doc))
