cvar
: CVT Variations Table¶
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class
fontTools.ttLib.tables._c_v_a_r.
table__c_v_a_r
(tag=None)[source]¶ -
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dependencies
= ['cvt ', 'fvar']¶
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merge
(m, tables)¶
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TupleVariation¶
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class
fontTools.ttLib.tables.TupleVariation.
TupleVariation
(axes, coordinates)[source] -
calcInferredDeltas
(origCoords, endPts)[source]
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compile
(axisTags, sharedCoordIndices={}, pointData=None)[source]
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compileCoord
(axisTags)[source]
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static
compileDeltaValues_
(deltas, bytearr=None)[source] [value1, value2, value3, …] –> bytearray
Emits a sequence of runs. Each run starts with a byte-sized header whose 6 least significant bits (header & 0x3F) indicate how many values are encoded in this run. The stored length is the actual length minus one; run lengths are thus in the range [1..64]. If the header byte has its most significant bit (0x80) set, all values in this run are zero, and no data follows. Otherwise, the header byte is followed by ((header & 0x3F) + 1) signed values. If (header & 0x40) is clear, the delta values are stored as signed bytes; if (header & 0x40) is set, the delta values are signed 16-bit integers.
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compileDeltas
()[source]
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compileIntermediateCoord
(axisTags)[source]
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static
compilePoints
(points)[source]
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static
decompileCoord_
(axisTags, data, offset)[source]
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static
decompileDeltas_
(numDeltas, data, offset)[source] (numDeltas, data, offset) –> ([delta, delta, …], newOffset)
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static
decompilePoints_
(numPoints, data, offset, tableTag)[source] (numPoints, data, offset, tableTag) –> ([point1, point2, …], newOffset)
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static
encodeDeltaRunAsBytes_
(deltas, offset, bytearr)[source]
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static
encodeDeltaRunAsWords_
(deltas, offset, bytearr)[source]
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static
encodeDeltaRunAsZeroes_
(deltas, offset, bytearr)[source]
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fromXML
(name, attrs, _content)[source]
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getCoordWidth
()[source] Return 2 if coordinates are (x, y) as in gvar, 1 if single values as in cvar, or 0 if empty.
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static
getTupleSize_
(flags, axisCount)[source]
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getUsedPoints
()[source]
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hasImpact
()[source] Returns True if this TupleVariation has any visible impact.
If the result is False, the TupleVariation can be omitted from the font without making any visible difference.
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optimize
(origCoords, endPts, tolerance=0.5, isComposite=False)[source]
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roundDeltas
()[source]
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scaleDeltas
(scalar)[source]
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toXML
(writer, axisTags)[source]
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fontTools.ttLib.tables.TupleVariation.
compileSharedTuples
(axisTags, variations, MAX_NUM_SHARED_COORDS=4096)[source]
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fontTools.ttLib.tables.TupleVariation.
compileTupleVariationStore
(variations, pointCount, axisTags, sharedTupleIndices, useSharedPoints=True)[source]
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fontTools.ttLib.tables.TupleVariation.
decompileSharedTuples
(axisTags, sharedTupleCount, data, offset)[source]
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fontTools.ttLib.tables.TupleVariation.
decompileTupleVariationStore
(tableTag, axisTags, tupleVariationCount, pointCount, sharedTuples, data, pos, dataPos)[source]
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fontTools.ttLib.tables.TupleVariation.
decompileTupleVariation_
(pointCount, sharedTuples, sharedPoints, tableTag, axisTags, data, tupleData)[source]
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fontTools.ttLib.tables.TupleVariation.
inferRegion_
(peak)[source] Infer start and end for a (non-intermediate) region
This helper function computes the applicability region for variation tuples whose INTERMEDIATE_REGION flag is not set in the TupleVariationHeader structure. Variation tuples apply only to certain regions of the variation space; outside that region, the tuple has no effect. To make the binary encoding more compact, TupleVariationHeaders can omit the intermediateStartTuple and intermediateEndTuple fields.