public void Update(CanvasBitmap bitmap, bool redraw = true)
{
Clear();
if (bitmap == null)
{
this.measureBitmap.Dispose();
this.measureBitmap = null;
this.canvas.Width = this.canvas.Height = 0;
CanMeasure = false;
return;
}
var contentSize = bitmap.SizeInPixels;
var width = (int)contentSize.Width + StartX * 2;
var height = (int)contentSize.Height + StartY * 2;
measureBitmap = CreateEmptyBitmap(width, height);
measureBitmap.CopyPixelsFromBitmap(bitmap, StartX, StartY);
this.canvas.Width = width;
this.canvas.Height = height;
magnifier = magnifier ?? new Magnifier(this.canvas);
magnifier.Source = measureBitmap;
if (redraw)
{
this.canvas.Invalidate();
}
CanMeasure = true;
}
