XyzColor.extrapolate constructor
Constructs a XyzColor from a list of xyz
values on a 0
to 1
scale.
xyz
must not be null and must have exactly 3
or 4
values.
Each of the values must be >= 0
and <= 1
.
Implementation
factory XyzColor.extrapolate(List<double> values) {
assert(values.length == 3 || values.length == 4);
assert(values[0] >= 0);
assert(values[1] >= 0);
assert(values[2] >= 0);
if (values.length == 4) assert(values[3] >= 0 && values[3] <= 1);
final alpha = values.length == 4 ? (values[3] * 255).round() : 255;
return XyzColor(values[0] * 100, values[1] * 100, values[2] * 100, alpha);
}