private static State <FilterChainState, XElement> BuildGaussianBlur(GaussianBlurFilter filter, CoordinatesConverter converter)
{
var basicElement =
XElementBuilder
.WithName("feGaussianBlur")
.Add(
new XAttribute(
"stdDeviation",
$"{ converter.ScaleDistance( filter.StandardDeviationX )} { converter.ScaleDistance( filter.StandardDeviationY )}"));
return(basicElement.Pipe(BuildIOFilter).Select(x => x.Build()));
}
private static State <FilterChainState, IEnumerable <XElement> > BuildMorphologyFilter(Morphology morphology, CoordinatesConverter converter)
{
var svgRadiusX = converter.ScaleDistance(morphology.RadiusX);
var svgRadiusY = converter.ScaleDistance(morphology.RadiusY);
var core =
XElementBuilder.WithName("feMorphology")
.Add(
new XAttribute("radius", $"{svgRadiusX} {svgRadiusY}"),
new XAttribute("operator", morphology.MorphologyType.ToString())
);
return(BuildIOFilter(core).Select(x => x.Build()).Select(x => new[] { x }.AsEnumerable()));
}
private static State <FilterChainState, XElement> BuildDropShadowFilter(DropShadowFilter filter, CoordinatesConverter converter)
{
var svgVector = filter.ShadowVector.Pipe(converter.ToSvgVector);
var element =
XElementBuilder.WithName("feDropShadow").Add(
new XAttribute("dx", svgVector.Dx),
new XAttribute("dy", svgVector.Dy),
new XAttribute("stdDeviation", converter.ScaleDistance(filter.StdDeviation)));
return(element.Pipe(BuildIOFilter).Select(x => x.Build()));
}
private static State <FilterChainState, IEnumerable <XElement> > BuildDisplacementFilter(DisplacementFilter displacementFilter, CoordinatesConverter converter)
{
var elementCore =
XElementBuilder.WithName("feDisplacementMap")
.Add(
new XAttribute("scale", converter.ScaleDistance(displacementFilter.Scale)),
new XAttribute("xChannelSelector", "R"),
new XAttribute("yChannelSelector", "B")
);
return(BuildTwoInputFilter(elementCore, displacementFilter.DisplacementProvider, converter));
}