public sd2.PathGradientBrush GetBrush(RectangleF rect)
{
var scale = 1f;
var bounds = rect;
if (Matrix != null)
{
bounds = Matrix.Inverse().TransformRectangle(bounds);
}
scale = GradientHelper.GetRadialScale(Center, Radius, GradientOrigin, bounds);
if (brush == null || lastScale != scale)
{
lastScale = scale;
var scaledRect = new RectangleF(GradientOrigin - (GradientOrigin - Center + Radius) * scale, GradientOrigin + (Center + Radius - GradientOrigin) * scale);
var path = new sd2.GraphicsPath();
path.AddEllipse(scaledRect.ToSD());
brush = new sd2.PathGradientBrush(path);
brush.CenterColor = StartColor.ToSD();
brush.CenterPoint = GradientOrigin.ToSD();
brush.WrapMode = wrapMode.ToSD();
brush.SurroundColors = new[] { EndColor.ToSD() };
if (Matrix != null)
{
brush.MultiplyTransform(Matrix.ToSD());
}
if (scale > 1f)
{
var paths = GradientHelper.GetGradientStops(StartColor.ToSD(), EndColor.ToSD(), scale, wrapMode);
brush.InterpolationColors = new sd2.ColorBlend
{
Positions = paths.Reverse().Select(r => 1f - r.Item1).ToArray(),
Colors = paths.Reverse().Select(r => r.Item2).ToArray()
};
}
}
return(brush);
}