61 lines
1.8 KiB
Python
61 lines
1.8 KiB
Python
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import pytest
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from fontTools.varLib.models import VariationModel
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from fontTools.varLib.varStore import OnlineVarStoreBuilder, VarStoreInstancer
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from fontTools.ttLib.tables._f_v_a_r import Axis
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@pytest.mark.parametrize(
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"locations, masterValues",
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[
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(
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[{}, {"a": 1}],
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[
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[10, 20],
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[100, 2000],
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[100, 22000],
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],
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),
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(
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[{}, {"a": 1}, {"b": 1}, {"a": 1, "b": 1}],
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[
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[10, 20, 40, 60],
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[100, 2000, 400, 6000],
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[100, 22000, 4000, 30000],
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],
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),
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],
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)
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def test_onlineVarStoreBuilder(locations, masterValues):
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axisTags = sorted({k for loc in locations for k in loc})
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model = VariationModel(locations)
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builder = OnlineVarStoreBuilder(axisTags)
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builder.setModel(model)
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expectedDeltasAndVarIdxs = []
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for masters in masterValues:
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base, *deltas = model.getDeltas(masters)
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varIdx = builder.storeDeltas(deltas)
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expectedDeltasAndVarIdxs.append((deltas, varIdx))
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varStore = builder.finish()
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varData = varStore.VarData
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for deltas, varIdx in expectedDeltasAndVarIdxs:
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major, minor = varIdx >> 16, varIdx & 0xFFFF
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storedDeltas = varData[major].Item[minor]
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assert deltas == storedDeltas
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fvarAxes = [buildAxis(axisTag) for axisTag in axisTags]
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instancer = VarStoreInstancer(varStore, fvarAxes)
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for masters, (deltas, varIdx) in zip(masterValues, expectedDeltasAndVarIdxs):
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base, *rest = masters
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for expectedValue, loc in zip(masters, locations):
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instancer.setLocation(loc)
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value = base + instancer[varIdx]
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assert expectedValue == value
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def buildAxis(axisTag):
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axis = Axis()
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axis.axisTag = axisTag
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return axis
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