Create Drop Shadow Effect on SVG Programmatically in C#

Create-Drop-Shadow-feOffset-SVG.cs

// Initialize an object of SVGDocument class
Aspose.Svg.SVGDocument document = new Aspose.Svg.SVGDocument();

// Set SVG Namespace Url
string SvgNamespace = "http://www.w3.org/2000/svg";

// Get root svg element of the document
Aspose.Svg.SVGSVGElement svgElement = document.RootElement;

// Create a defs element and add to the svgElement
Aspose.Svg.SVGDefsElement defsElement = (Aspose.Svg.SVGDefsElement)document.CreateElementNS(SvgNamespace, "defs");
svgElement.AppendChild(defsElement);

// Create a filter element and add to the defsElement
var filterElement = (Aspose.Svg.SVGFilterElement)document.CreateElementNS(SvgNamespace, "filter");
filterElement.Id = "shadow";
filterElement.SetAttribute("x", "-20px");
filterElement.SetAttribute("y", "-20px");
filterElement.SetAttribute("height", "150px");
filterElement.SetAttribute("width", "150px");
defsElement.AppendChild(filterElement);

// Create a feOffset filter primitive and add to the filterElement
var feOffsetElement = (Aspose.Svg.Filters.SVGFEOffsetElement)document.CreateElementNS(SvgNamespace, "feOffset");
feOffsetElement.In1.BaseVal = "SourceAlpha";
feOffsetElement.SetAttribute("result", "offset");
feOffsetElement.SetAttribute("dx", "3");
feOffsetElement.SetAttribute("dy", "3");
filterElement.AppendChild(feOffsetElement);

//// Create a feGaussianBlur filter primitive and add to the filterElement
//var feGaussianBlurElement = (Aspose.Svg.Filters.SVGFEGaussianBlurElement)document.CreateElementNS(SvgNamespace, "feGaussianBlur");
//feGaussianBlurElement.In1.BaseVal = "offset";
//feGaussianBlurElement.StdDeviationX.BaseVal = 3;
//feGaussianBlurElement.StdDeviationY.BaseVal = 3;
//feGaussianBlurElement.SetAttribute("result", "blur");
//filterElement.AppendChild(feGaussianBlurElement);

// Create a feBlend filter primitive and add to the filterElement
var feBlendElement = (Aspose.Svg.Filters.SVGFEBlendElement)document.CreateElementNS(SvgNamespace, "feBlend");
feBlendElement.In1.BaseVal = "SourceGraphic";
feBlendElement.In2.BaseVal = "blur";
feBlendElement.SetAttribute("mode", "normal");
filterElement.AppendChild(feBlendElement);

// Create a text element and add to the svgElement
var textElement = (Aspose.Svg.SVGTextElement)document.CreateElementNS(SvgNamespace, "text");
textElement.Style.FontSize = "5em";
textElement.SetAttribute("x", "20px");
textElement.SetAttribute("fill", "#C0C0C0");
textElement.SetAttribute("y", "100px");
textElement.TextContent = "Aspose.SVG API";
textElement.SetAttribute("filter", "url(#shadow)");
svgElement.InsertBefore(textElement, svgElement.FirstChild);

// Save the SVG document
document.Save(Path.Combine(dataDir, "DropShadow.svg"));