public UGRadialGradientBrush(IUGContext context, Vector2 center, float radius, IEnumerable <UGGradientStop> gradientStops, UGEdgeBehavior edgeBehavior)
{
Center = center;
Radius = radius;
EdgeBehavior = edgeBehavior;
Stops = gradientStops.ToArray();
if (Stops.Length < 2)
{
throw new ArgumentException(nameof(gradientStops));
}
unsafe
{
var baseFunction = CGFunctionsHelper.GetCGFunction(EdgeBehavior);
CGFunction.CGFunctionEvaluate function = (data, outData) => baseFunction(Stops, data, outData);
var domain = new nfloat[] { 0, edgeBehavior != UGEdgeBehavior.Clamp ? 1.5F : 1 };
_function = new CGFunction(domain, new nfloat[] { 0, 1, 0, 1, 0, 1, 0, 1 }, function);
}
var cgCenter = Center.ToCGPoint();
var cgRadius = EdgeBehavior != UGEdgeBehavior.Clamp ? 1.5F * Radius : Radius;
using (var colorSpace = CGColorSpace.CreateSrgb())
{
_native = CGShading.CreateRadial(colorSpace, cgCenter, 0F, cgCenter, cgRadius, _function, true, true);
}
}
