protected override RequestedAction PostPrepareSourceBitmap(ImageState s)
{
if (s.sourceBitmap == null)
{
return(RequestedAction.None);
}
bool focusFaces = ("faces".Equals(s.settings["c.focus"], StringComparison.OrdinalIgnoreCase));
bool showFaces = "true".Equals(s.settings["f.show"], StringComparison.OrdinalIgnoreCase);
List <Face> faces = null;
//Perform face detection for either (or both) situations
if (showFaces || focusFaces)
{
using (var detector = ConfigureDetection(s.settings)) {
//Store faces
s.Data["faces"] = faces = detector.DetectFeatures(s.sourceBitmap);
}
//Store points
List <PointF> points = new List <PointF>();
foreach (Face r in faces)
{
points.Add(new PointF(r.X, r.Y)); points.Add(new PointF(r.X2, r.Y2));
}
s.layout.AddInvisiblePolygon("faces", points.ToArray());
}
//Capture and rewrite requests with &c.focus=faces
if (focusFaces)
{
//Write the face points as focus values
List <double> focusPoints = new List <double>();
foreach (Face r in faces)
{
focusPoints.Add(r.X); focusPoints.Add(r.Y); focusPoints.Add(r.X2); focusPoints.Add(r.Y2);
}
NameValueCollectionExtensions.SetList <double>(s.settings, "c.focus", focusPoints.ToArray(), false);
}
return(RequestedAction.None);
}