private async Task RenderSvg(IRandomAccessStream writeStream)
{
var sharedDevice = CanvasDevice.GetSharedDevice();
using (var offscreen = new CanvasRenderTarget(sharedDevice, (float)InkControl.RenderSize.Width, (float)InkControl.RenderSize.Height, 96))
{
using (var session = offscreen.CreateDrawingSession())
{
var svgDocument = new CanvasSvgDocument(sharedDevice);
svgDocument.Root.SetStringAttribute("viewBox", $"0 0 {InkControl.RenderSize.Width} {InkControl.RenderSize.Height}");
foreach (var stroke in InkControl.InkPresenter.StrokeContainer.GetStrokes())
{
var canvasGeometry = CanvasGeometry.CreateInk(session, new[] { stroke }).Outline(); //.Simplify(CanvasGeometrySimplification.Lines);
var pathReceiver = new CanvasGeometryToSvgPathReader();
canvasGeometry.SendPathTo(pathReceiver);
var element = svgDocument.Root.CreateAndAppendNamedChildElement("path");
element.SetStringAttribute("d", pathReceiver.Path);
var color = stroke.DrawingAttributes.Color;
element.SetColorAttribute("fill", color);
//if (stroke.DrawingAttributes.DrawAsHighlighter)
// element.SetFloatAttribute("fill-opacity", .9f);
}
await svgDocument.SaveAsync(writeStream);
}
}
}
private async void Save_Clicked(object sender, RoutedEventArgs e)
{
if (svgDocument == null)
{
return;
}
using (var stream = await ApplicationData.Current.LocalFolder.OpenStreamForWriteAsync(
"SvgExample.svg",
CreationCollisionOption.ReplaceExisting))
{
await svgDocument.SaveAsync(stream.AsRandomAccessStream());
}
}