private ICanvasImage CreateEdgeDetection()
{
textLabel = requiresWin10;
var edgeDetectionEffect = new EdgeDetectionEffect
{
Source = bitmapTiger
};
// Animation changes the edge detection settings.
animationFunction = elapsedTime =>
{
edgeDetectionEffect.Amount = 0.7f + (float)Math.Sin(elapsedTime * 2) * 0.3f;
edgeDetectionEffect.BlurAmount = Math.Max((float)Math.Sin(elapsedTime * 0.7) * 2, 0);
};
return edgeDetectionEffect;
}
ICanvasImage GetSelectionBorder(ICanvasImage mask, float zoomFactor)
{
// Scale so our border will always be the same width no matter how the image is zoomed.
var scaleToCurrentZoom = new ScaleEffect
{
Source = mask,
Scale = new Vector2(zoomFactor)
};
// Find edges of the selection.
var detectEdges = new EdgeDetectionEffect
{
Source = scaleToCurrentZoom,
Amount = 0.1f
};
// Colorize.
var colorItMagenta = new ColorMatrixEffect
{
Source = detectEdges,
ColorMatrix = new Matrix5x4
{
M11 = 1,
M13 = 1,
M14 = 1,
}
};
// Scale back to the original size.
return new ScaleEffect
{
Source = colorItMagenta,
Scale = new Vector2(1 / zoomFactor)
};
}
