public virtual void Update(IClipper clipper)
{
var matrix = this.Camera.Matrix;
var camera = new Camera(matrix);
var oldOffset = this.DataOrigin;
var oldSize = this.DataSize;
var oldPosition = this.ClipOrigin;
var matrixOffset = new Point(-matrix.OffsetX, -matrix.OffsetY);
this.Update();
var newOffset = this.DataOrigin;
var newSize = this.DataSize;
if (newSize.Width < oldSize.Width &&
(oldPosition.X + oldOffset.X) == matrixOffset.X)
{
var h = Math.Max(oldSize.Height, newSize.Height);
var rect = new Rectangle(
newSize.Width,
matrix.OffsetY,
oldSize.Width - newSize.Width,
h);
clipper.Add(RectangleShape.Hull(camera.ToSource(rect), 0, false));
}
if (newSize.Height < oldSize.Height &&
(oldPosition.Y + oldOffset.Y) == matrixOffset.Y)
{
var w = Math.Max(oldSize.Width, newSize.Width);
var rect = new Rectangle(
matrix.OffsetX,
newSize.Height,
w,
oldSize.Height - newSize.Height);
clipper.Add(RectangleShape.Hull(camera.ToSource(rect), 0, false));
}
if (newOffset.X != oldOffset.X || newOffset.Y != oldOffset.Y)
{
clipper.RenderAll = true;
}
}
public override Point[] Measure(Matrix matrix, int delta, bool extend)
{
if (Data == null)
{
return(null);
}
var location = Point.Zero;
if (OuterShape != null)
{
location = OuterShape.Location;
}
var hull = RectangleShape.Hull(new Rectangle(location, Data.Size), delta, extend);
if (matrix != null && !matrix.IsIdentity)
{
matrix.Transform(hull);
}
return(hull);
}