Unity3d: 2D Pixel Perfect Camera

CameraLayout.cs

using UnityEngine;
using UnityEngine.UI;
using System.Collections;

namespace RutCreate {

	[ExecuteInEditMode]
	public class CameraLayout : MonoBehaviour {
		
		public Vector2 referenceResolution = new Vector2(800f, 600f);
		
		public float referencePixelPerUnit = 100f;

		public Color faceColor = new Color(0f, 0f, 0f, 0f);

		public Color outlineColor = new Color(1f, 1f, 1f);

		private void Start() {
			Reset();
		}

		public void Reset() {
			CanvasScaler[] scalers = FindObjectsOfType<CanvasScaler>();
			foreach (CanvasScaler scaler in scalers) {
				scaler.referenceResolution = referenceResolution;
				scaler.referencePixelsPerUnit = referencePixelPerUnit;
			}

			Camera.main.orthographicSize = referenceResolution.y / referencePixelPerUnit / 2f;
			Camera.main.transform.localPosition = Vector3.zero + Vector3.back * 10f;
		}

		private void OnDrawGizmos() {
			DrawCameraRegion();
		}
		
		private void DrawCameraRegion() {
			Vector3 position = Camera.main.transform.position;
			Vector2 size = Utils.GetCameraSizeInUnit();
			
			Vector3[] vertices = {
				new Vector3(position.x - size.x * 0.5f, position.y + size.y * 0.5f, transform.position.z),
				new Vector3(position.x + size.x * 0.5f, position.y + size.y * 0.5f, transform.position.z),
				new Vector3(position.x + size.x * 0.5f, position.y - size.y * 0.5f, transform.position.z),
				new Vector3(position.x - size.x * 0.5f, position.y - size.y * 0.5f, transform.position.z)
			};
			
			UnityEditor.Handles.DrawSolidRectangleWithOutline(vertices, faceColor, outlineColor);
		}

	}

}

CameraLayoutInspector.cs

using UnityEngine;
using UnityEditor;
using System.Collections;

namespace RutCreate {

	[CustomEditor(typeof(CameraLayout))]
	public class CameraLayoutInspector : Editor {

		public override void OnInspectorGUI() {
			DrawDefaultInspector();

			CameraLayout camLayout = target as CameraLayout;

			if (GUILayout.Button("Reset position and size")) {
				camLayout.Reset();
			}
		}

	}

}