Added hair, facial hair, magic mirror (#452)

* Added hair, facial hair, magic mirror

* I forgot to commit the textures lmao

* Use shader to fix hair color blending

Content.Client/GameObjects/Components/Mobs/HairComponent.cs

@@ -0,0 +1,100 @@
+using Content.Shared.GameObjects.Components.Mobs;
+using Content.Shared.Preferences.Appearance;
+using Robust.Client.GameObjects;
+using Robust.Client.Graphics.Shaders;
+using Robust.Client.Interfaces.GameObjects.Components;
+using Robust.Shared.GameObjects;
+using Robust.Shared.IoC;
+using Robust.Shared.Maths;
+using Robust.Shared.Prototypes;
+
+namespace Content.Client.GameObjects.Components.Mobs
+{
+    [RegisterComponent]
+    public sealed class HairComponent : SharedHairComponent
+    {
+        private const string HairShaderName = "hair";
+        private const string HairColorParameter = "hairColor";
+
+#pragma warning disable 649
+        [Dependency] private readonly IPrototypeManager _prototypeManager;
+#pragma warning restore 649
+
+        private ShaderInstance _facialHairShader;
+        private ShaderInstance _hairShader;
+
+        public override void Initialize()
+        {
+            base.Initialize();
+
+            var shaderProto = _prototypeManager.Index<ShaderPrototype>(HairShaderName);
+
+            _facialHairShader = shaderProto.InstanceUnique();
+            _hairShader = shaderProto.InstanceUnique();
+        }
+
+        protected override void Startup()
+        {
+            base.Startup();
+
+            if (Owner.TryGetComponent(out ISpriteComponent sprite))
+            {
+                sprite.LayerSetShader(HumanoidVisualLayers.Hair, _hairShader);
+                sprite.LayerSetShader(HumanoidVisualLayers.FacialHair, _facialHairShader);
+            }
+        }
+
+        public override string FacialHairStyleName
+        {
+            get => base.FacialHairStyleName;
+            set
+            {
+                base.FacialHairStyleName = value;
+                UpdateHairStyle();
+            }
+        }
+
+        public override string HairStyleName
+        {
+            get => base.HairStyleName;
+            set
+            {
+                base.HairStyleName = value;
+                UpdateHairStyle();
+            }
+        }
+
+        public override Color HairColor
+        {
+            get => base.HairColor;
+            set
+            {
+                base.HairColor = value;
+                UpdateHairStyle();
+            }
+        }
+
+        public override Color FacialHairColor
+        {
+            get => base.FacialHairColor;
+            set
+            {
+                base.FacialHairColor = value;
+                UpdateHairStyle();
+            }
+        }
+
+        private void UpdateHairStyle()
+        {
+            var sprite = Owner.GetComponent<SpriteComponent>();
+
+            _hairShader?.SetParameter(HairColorParameter, HairColor);
+            _facialHairShader?.SetParameter(HairColorParameter, FacialHairColor);
+
+            sprite.LayerSetState(HumanoidVisualLayers.Hair,
+                HairStyles.HairStylesMap[HairStyleName ?? HairStyles.DefaultHairStyle]);
+            sprite.LayerSetState(HumanoidVisualLayers.FacialHair,
+                HairStyles.FacialHairStylesMap[FacialHairStyleName ?? HairStyles.DefaultFacialHairStyle]);
+        }
+    }
+}