protected override unsafe void Map(Color32 *pixels, int len)
{
setGradient ??= DGradient.FromUnityGradient(gradient);
for (int ii = 0; ii < len; ++ii)
{
ref Color32 pixel = ref pixels[ii];
var a = pixel.a;
if (a > byte.MinValue)
{
pixel = setGradient.Evaluate32(pixel.r / 255f);
pixel.a = a;
}
}
public WrapGradient(DGradient grad) => g = grad;
