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Allow multiple value record types in the same pairpos table (#2776)

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* Use buildPairPosClassesSubtable's ability to promote value records (see #2772)

* Add tests for #2772
This commit is contained in:
Simon Cozens 2022-09-05 14:44:50 +01:00 committed by GitHub
parent 5d5c16207b
commit 64fd837ca1
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GPG Key ID: 4AEE18F83AFDEB23
4 changed files with 111 additions and 15 deletions
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17
Lib/fontTools/otlLib/builder.py
View File

@ -1387,27 +1387,16 @@ class PairPosBuilder(LookupBuilder):
lookup.
"""
builders = {}
builder = None
builder = ClassPairPosSubtableBuilder(self)
for glyphclass1, value1, glyphclass2, value2 in self.pairs:
if glyphclass1 is self.SUBTABLE_BREAK_:
if builder is not None:
builder.addSubtableBreak()
builder.addSubtableBreak()
continue
valFormat1, valFormat2 = 0, 0
if value1:
valFormat1 = value1.getFormat()
if value2:
valFormat2 = value2.getFormat()
builder = builders.get((valFormat1, valFormat2))
if builder is None:
builder = ClassPairPosSubtableBuilder(self)
builders[(valFormat1, valFormat2)] = builder
builder.addPair(glyphclass1, value1, glyphclass2, value2)
subtables = []
if self.glyphPairs:
subtables.extend(buildPairPosGlyphs(self.glyphPairs, self.glyphMap))
for key in sorted(builders.keys()):
subtables.extend(builders[key].subtables())
subtables.extend(builder.subtables())
lookup = self.buildLookup_(subtables)
# Compact the lookup

2
Tests/feaLib/builder_test.py
View File

@ -69,7 +69,7 @@ class BuilderTest(unittest.TestCase):
spec9a spec9b spec9c1 spec9c2 spec9c3 spec9d spec9e spec9f spec9g
spec10
bug453 bug457 bug463 bug501 bug502 bug504 bug505 bug506 bug509
bug512 bug514 bug568 bug633 bug1307 bug1459 bug2276
bug512 bug514 bug568 bug633 bug1307 bug1459 bug2276 variable_bug2772
name size size2 multiple_feature_blocks omitted_GlyphClassDef
ZeroValue_SinglePos_horizontal ZeroValue_SinglePos_vertical
ZeroValue_PairPos_horizontal ZeroValue_PairPos_vertical

4
Tests/feaLib/data/variable_bug2772.fea Normal file
View File

@ -0,0 +1,4 @@
feature kern {
pos [p] g -5;
pos [p] y (wght=1000:-100 wght=200:0);
} kern;

103
Tests/feaLib/data/variable_bug2772.ttx Normal file
View File

@ -0,0 +1,103 @@
<?xml version="1.0" encoding="UTF-8"?>
<ttFont sfntVersion="\x00\x01\x00\x00" ttLibVersion="4.37">
<GDEF>
<Version value="0x00010003"/>
<VarStore Format="1">
<Format value="1"/>
<VarRegionList>
<!-- RegionAxisCount=2 -->
<!-- RegionCount=1 -->
<Region index="0">
<VarRegionAxis index="0">
<StartCoord value="0.0"/>
<PeakCoord value="1.0"/>
<EndCoord value="1.0"/>
</VarRegionAxis>
<VarRegionAxis index="1">
<StartCoord value="0.0"/>
<PeakCoord value="0.0"/>
<EndCoord value="0.0"/>
</VarRegionAxis>
</Region>
</VarRegionList>
<!-- VarDataCount=1 -->
<VarData index="0">
<!-- ItemCount=1 -->
<NumShorts value="0"/>
<!-- VarRegionCount=1 -->
<VarRegionIndex index="0" value="0"/>
<Item index="0" value="[-100]"/>
</VarData>
</VarStore>
</GDEF>
<GPOS>
<Version value="0x00010000"/>
<ScriptList>
<!-- ScriptCount=1 -->
<ScriptRecord index="0">
<ScriptTag value="DFLT"/>
<Script>
<DefaultLangSys>
<ReqFeatureIndex value="65535"/>
<!-- FeatureCount=1 -->
<FeatureIndex index="0" value="0"/>
</DefaultLangSys>
<!-- LangSysCount=0 -->
</Script>
</ScriptRecord>
</ScriptList>
<FeatureList>
<!-- FeatureCount=1 -->
<FeatureRecord index="0">
<FeatureTag value="kern"/>
<Feature>
<!-- LookupCount=1 -->
<LookupListIndex index="0" value="0"/>
</Feature>
</FeatureRecord>
</FeatureList>
<LookupList>
<!-- LookupCount=1 -->
<Lookup index="0">
<LookupType value="2"/>
<LookupFlag value="0"/>
<!-- SubTableCount=1 -->
<PairPos index="0" Format="2">
<Coverage>
<Glyph value="p"/>
</Coverage>
<ValueFormat1 value="68"/>
<ValueFormat2 value="0"/>
<ClassDef1>
</ClassDef1>
<ClassDef2>
<ClassDef glyph="g" class="2"/>
<ClassDef glyph="y" class="1"/>
</ClassDef2>
<!-- Class1Count=1 -->
<!-- Class2Count=3 -->
<Class1Record index="0">
<Class2Record index="0">
<Value1 XAdvance="0"/>
</Class2Record>
<Class2Record index="1">
<Value1 XAdvance="0">
<XAdvDevice>
<StartSize value="0"/>
<EndSize value="0"/>
<DeltaFormat value="32768"/>
</XAdvDevice>
</Value1>
</Class2Record>
<Class2Record index="2">
<Value1 XAdvance="-5"/>
</Class2Record>
</Class1Record>
</PairPos>
</Lookup>
</LookupList>
</GPOS>
</ttFont>