public void BeginDraw()
{
EditorZoomArea.Begin(_canvas.Zoom, _canvas.WindowRect);
Rect drawArea =
new Rect(
_canvas.Position - _canvas.WindowRect.position / _canvas.Zoom,
Vector2.one * _canvas.CanvasSize);
GUILayout.BeginArea(drawArea);
}
public void EndDraw()
{
GUILayout.EndArea();
EditorZoomArea.End();
}