Inheritance: SvgTransformableElement, ISharpGDIPath, ISvgClipPathElement, ISharpDoNotPaint, IContainerElement
Esempio n. 1
0
        private GraphicsPath CreateClippingRegion(SvgClipPathElement clipPath)
        {
            GraphicsPath path = new GraphicsPath();

            foreach (XmlNode node in clipPath.ChildNodes)
            {
                if (node.NodeType != XmlNodeType.Element)
                {
                    continue;
                }

                // Handle a case where the clip element has "use" element as a child...
                if (String.Equals(node.LocalName, "use"))
                {
                    SvgUseElement useElement = (SvgUseElement)node;

                    XmlElement refEl = useElement.ReferencedElement;
                    if (refEl != null)
                    {
                        XmlElement refElParent = (XmlElement)refEl.ParentNode;
                        useElement.OwnerDocument.Static = true;
                        useElement.CopyToReferencedElement(refEl);
                        refElParent.RemoveChild(refEl);
                        useElement.AppendChild(refEl);

                        foreach (XmlNode useChild in useElement.ChildNodes)
                        {
                            if (useChild.NodeType != XmlNodeType.Element)
                            {
                                continue;
                            }

                            SvgStyleableElement element = useChild as SvgStyleableElement;
                            if (element != null && element.RenderingHint == SvgRenderingHint.Shape)
                            {
                                GraphicsPath childPath = CreatePath(element);

                                if (childPath != null)
                                {
                                    string clipRule = element.GetPropertyValue("clip-rule");
                                    path.FillMode = (clipRule == "evenodd") ? FillMode.Alternate : FillMode.Winding;

                                    path.AddPath(childPath, true);
                                }
                            }
                        }

                        useElement.RemoveChild(refEl);
                        useElement.RestoreReferencedElement(refEl);
                        refElParent.AppendChild(refEl);
                        useElement.OwnerDocument.Static = false;
                    }
                }
                else
                {
                    SvgStyleableElement element = node as SvgStyleableElement;
                    if (element != null && element.RenderingHint == SvgRenderingHint.Shape)
                    {
                        GraphicsPath childPath = CreatePath(element);

                        if (childPath != null)
                        {
                            string clipRule = element.GetPropertyValue("clip-rule");
                            path.FillMode = (clipRule == "evenodd") ? FillMode.Alternate : FillMode.Winding;

                            path.AddPath(childPath, true);
                        }
                    }
                }
            }

            return path;
        }
Esempio n. 2
0
        private GeometryCollection CreateClippingRegion(SvgClipPathElement clipPath,
            WpfDrawingContext context)
        {
            GeometryCollection geomColl = new GeometryCollection();

            foreach (XmlNode node in clipPath.ChildNodes)
            {
                if (node.NodeType != XmlNodeType.Element)
                {
                    continue;
                }

                // Handle a case where the clip element has "use" element as a child...
                if (String.Equals(node.LocalName, "use"))
                {
                    SvgUseElement useElement = (SvgUseElement)node;

                    XmlElement refEl = useElement.ReferencedElement;
                    if (refEl != null)
                    {
                        XmlElement refElParent = (XmlElement)refEl.ParentNode;
                        useElement.OwnerDocument.Static = true;
                        useElement.CopyToReferencedElement(refEl);
                        refElParent.RemoveChild(refEl);
                        useElement.AppendChild(refEl);

                        foreach (XmlNode useChild in useElement.ChildNodes)
                        {
                            if (useChild.NodeType != XmlNodeType.Element)
                            {
                                continue;
                            }

                            SvgStyleableElement element = useChild as SvgStyleableElement;
                            if (element != null && element.RenderingHint == SvgRenderingHint.Shape)
                            {
                                Geometry childPath = CreateGeometry(element, context.OptimizePath);

                                if (childPath != null)
                                {
                                    geomColl.Add(childPath);
                                }
                            }
                        }

                        useElement.RemoveChild(refEl);
                        useElement.RestoreReferencedElement(refEl);
                        refElParent.AppendChild(refEl);
                        useElement.OwnerDocument.Static = false;
                    }
                }
                else
                {
                    SvgStyleableElement element = node as SvgStyleableElement;
                    if (element != null)
                    {
                        if (element.RenderingHint == SvgRenderingHint.Shape)
                        {
                            Geometry childPath = CreateGeometry(element, context.OptimizePath);

                            if (childPath != null)
                            {
                                geomColl.Add(childPath);
                            }
                        }
                        else if (element.RenderingHint == SvgRenderingHint.Text)
                        {
                            GeometryCollection textGeomColl = GetTextClippingRegion(element, context);
                            if (textGeomColl != null)
                            {
                                for (int i = 0; i < textGeomColl.Count; i++)
                                {
                                    geomColl.Add(textGeomColl[i]);
                                }
                            }
                        }
                    }
                }
            }

            return geomColl;
        }