protected GradientBrush GetGradientBrush(string fill, GradientBrush child)
{
XElement defE;
if (defs.TryGetValue (fill, out defE)) {
GradientBrush brush = null;
switch (defE.Name.LocalName) {
case "linearGradient":
brush = CreateLinearGradientBrush (defE);
break;
case "radialGradient":
brush = CreateRadialGradientBrush (defE);
break;
default:
throw new NotSupportedException ("Fill " + defE.Name);
}
if (child != null)
{
if (child is RadialGradientBrush && brush is RadialGradientBrush)
{
((RadialGradientBrush)brush).Center = ((RadialGradientBrush)child).Center;
((RadialGradientBrush)brush).Focus = ((RadialGradientBrush)child).Focus;
((RadialGradientBrush)brush).Radius = ((RadialGradientBrush)child).Radius;
} else if (child is LinearGradientBrush && brush is LinearGradientBrush)
{
((LinearGradientBrush)brush).Start = ((LinearGradientBrush)child).Start;
((LinearGradientBrush)brush).End = ((LinearGradientBrush)child).End;
}
brush.AddStops(child.Stops);
}
XNamespace xlink = "http://www.w3.org/1999/xlink";
var parent = defE.Attribute(xlink + "href");
if (parent != null && !string.IsNullOrEmpty(parent.Value))
{
brush = GetGradientBrush(parent.Value.Substring(1), brush);
}
return brush;
} else {
throw new Exception ("Invalid fill url reference: " + fill);
}
}
void WriteStops (GradientBrush gb)
{
w.Indent ();
foreach (var s in gb.Stops) {
w.Write ("<stop stop-color=\"{0}\" offset=\"{1}%\"", s.Color.HtmlString, s.Offset*100);
if (s.Color.A != 255) {
w.Write (" stop-opacity=\"{0}\"", s.Color.Alpha);
}
w.WriteLine (" />", s.Color.HtmlString, s.Offset*100);
}
w.Outdent ();
}