CODEWITHSUNDEEP
uwpgraphics2dwin2dwindows-composition-api
Muzib
Muzib

Reputation: 2581

How to add effect on CanvasGeometry

It seems to me that all the effects available in Win2D are for drawing image.

What about CanvasGeometry? How do I draw a CanvasGeometry using, say glowing effect ?

Thanks.

Upvotes: 2

Views: 232

Answers (1)

Nico Zhu
Nico Zhu

Reputation: 32775

Geometry objects provide a means of drawing and manipulating geometric shapes. It has CreatePolygon,CreatePathmethod could be used to create geometric shapes.

For glowing effect, you could refer this code sample.

private void DoEffect(CanvasDrawingSession ds, Size size, float amount)
{
    size.Width = size.Width - ExpandAmount;
    size.Height = size.Height - ExpandAmount;

    var offset = (float)(ExpandAmount / 2);           

    using (var textLayout = CreateTextLayout(ds, size))
    using (var textCommandList = new CanvasCommandList(ds))
    {
        using (var textDs = textCommandList.CreateDrawingSession())
        {                     
            textDs.DrawTextLayout(textLayout, 0, 0, GlowColor);
        }

         glowEffectGraph.Setup(textCommandList, amount);
         ds.DrawImage(glowEffectGraph.Output, offset, offset);

         ds.DrawTextLayout(textLayout, offset, offset, TextColor);
     }
}

Upvotes: 1

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