RectangleF GetZoomCrop()
{
RectangleF box = SalientBoundingBox();
var bounds = new RectangleF(new PointF(0, 0), ImageSize);
//Clip box to original image bounds
box = PolygonMath.ClipRectangle(box, bounds);
//Crop close
var copySize = PolygonMath.ScaleOutside(box.Size, TargetSize);
//Clip to bounds.
return(PolygonMath.ClipRectangle(PolygonMath.ExpandTo(box, copySize), bounds));
}
protected override RequestedAction LayoutImage(ImageState s)
{
//Only activated if both width and height are specified, and mode=crop.
if (s.settings.Mode != FitMode.Crop || s.settings.Width < 0 || s.settings.Height < 0)
{
return(RequestedAction.None);
}
//Calculate bounding box for all coordinates specified.
double[] focus = NameValueCollectionExtensions.GetList <double>(s.settings, "c.focus", null, 2, 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56, 60, 64, 68, 72);
if (focus == null)
{
return(RequestedAction.None);
}
RectangleF box = PolygonMath.GetBoundingBox(focus);
var bounds = new RectangleF(new PointF(0, 0), s.originalSize);
//Clip box to original image bounds
box = PolygonMath.ClipRectangle(box, bounds);
var targetSize = new SizeF(s.settings.Width, s.settings.Height);
SizeF copySize;
//Now, we can either crop as closely as possible or as loosely as possible.
if (NameValueCollectionExtensions.Get <bool>(s.settings, "c.zoom", false) && box.Width > 0 && box.Height > 0)
{
//Crop close
copySize = PolygonMath.ScaleOutside(box.Size, targetSize);
}
else
{
//Crop minimally
copySize = PolygonMath.ScaleInside(targetSize, bounds.Size);
//Ensure it's outside the box
if (!PolygonMath.FitsInside(box.Size, copySize))
{
copySize = PolygonMath.ScaleOutside(box.Size, copySize);
}
}
//Clip to bounds.
box = PolygonMath.ClipRectangle(PolygonMath.ExpandTo(box, copySize), bounds);
s.copyRect = box;
///What is the vertical and horizontal aspect ratio different in result pixels?
var padding = PolygonMath.ScaleInside(box.Size, targetSize);
padding = new SizeF(targetSize.Width - padding.Width, targetSize.Height - padding.Height);
//So, if we haven't met the aspect ratio yet, what mode will we pass on?
var finalmode = NameValueCollectionExtensions.Get <FitMode>(s.settings, "c.finalmode", FitMode.Pad);
//Crop off 1 or 2 pixels instead of padding without worrying too much
if (finalmode == FitMode.Pad && padding.Width + padding.Height < 3)
{
finalmode = FitMode.Crop;
}
s.settings.Mode = finalmode;
return(RequestedAction.None);
}
