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The OpenType spec (in the section on `"normalization" of OpenType Font Variations <https://docs.microsoft.com/en-us/typography/opentype/spec/otvaroverview#coordinate-scales-and-normalization>`_)
defines the required method for converting floating point values to
fixed-point. In particular it specifies the following rounding strategy:
for fractional values of 0.5 and higher, take the next higher integer;
for other fractional values, truncate.
This function rounds the floating-point value according to this strategy
in preparation for conversion to fixed-point.
Args:
value (float): The input floating-point value.
Returns
float: The rounded value.
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z }|| z S )a" Round to nearest multiple of factor and return shortest decimal representation.
This chooses the float that is closer to a multiple of the given factor while
having the shortest decimal representation (the least number of fractional decimal
digits).
For example, given the following:
>>> nearestMultipleShortestRepr(-0.61883544921875, 1.0/(1<<14))
'-0.61884'
Useful when you need to serialize or print a fixed-point number (or multiples
thereof, such as F2Dot14 fractions of 180 degrees in COLRv1 PaintRotate) in
a human-readable form.
Args:
value (value): The value to be rounded and serialized.
factor (float): The value which the result is a close multiple of.
Returns:
str: A compact string representation of the value.
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