ShaderInterface for 4mask

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public static class ShaderInterface {

    public enum ShaderMask {
        Head = 0,
        Body = 1,
        Legs = 2,
        Foot = 3
    }

    private static string[] maskName =
    {
        "_HeadTex",
        "_BodyTex",
        "_LegsTex",
        "_FootTex"
    };
    private static string[] maskToggleName =
    {
        "_HeadShow",
        "_BodyShow",
        "_LegsShow",
        "_FootShow"
    };

    private static Dictionary<GameObject, Material> gos = new Dictionary<GameObject, Material>();
    private static Dictionary<SpriteRenderer, Material> spr = new Dictionary<SpriteRenderer, Material>();

    public static void SetMask(Material material, Texture2D texture, ShaderMask smask) {
        string mask = maskName[(int) smask];
        if (material != null) {
            material.SetTexture(mask, texture);
            SetToggleMask(material, true, smask);
        }
        else {
            SetToggleMask(material, false, smask);
        }
    }

    public static void SetMask(SpriteRenderer renderer, Texture2D texture, ShaderMask smask) {
        Material material;
        if (spr.ContainsKey(renderer)) {
            material = spr[renderer];
        }
        else {
            material = renderer.material;
            spr.Add(renderer, material);
        }
        SetMask(material, texture, smask);
    }

    public static void SetTexture(GameObject go, Texture2D texture, ShaderMask smask) {
        Material material;
        if (gos.ContainsKey(go)) {
            material = gos[go];
        }
        else {
            material = go.GetComponent<SpriteRenderer>().material;
            gos.Add(go, material);
        }
        SetMask(material, texture, smask);
    }

    public static void SetToggleMask(Material material, bool state, ShaderMask smask) {
        string mask = maskToggleName[(int) smask];
        material.SetFloat(mask, state ? 1f : 0f);
    }

    public static void SetToggleMask(SpriteRenderer renderer, bool state, ShaderMask smask) {
        Material material;
        if (spr.ContainsKey(renderer)) {
            material = spr[renderer];
        }
        else {
            material = renderer.material;
            spr.Add(renderer, material);
        }
        SetToggleMask(material, state, smask);
    }

    public static void SetToggleMask(GameObject go, bool state, ShaderMask smask) {
        Material material;
        if (gos.ContainsKey(go)) {
            material = gos[go];
        }
        else {
            material = go.GetComponent<SpriteRenderer>().material;
            gos.Add(go, material);
        }
        SetToggleMask(material, state, smask);
    }

    public static void ClearCache() {
        gos.Clear();
        spr.Clear();
    }
}