Refactor Skulls to separate them from their entity renderer.

(Most mods would just create their own TESR class for custom skulls)

src/main/java/com/minelittlepony/render/PonySkullRenderer.java

@@ -1,16 +1,13 @@
 package com.minelittlepony.render;
 
-import java.util.HashMap;
-import java.util.Map;
-
-import javax.annotation.Nullable;
-
-import org.lwjgl.opengl.GL11;
-
 import com.minelittlepony.MineLittlePony;
 import com.minelittlepony.PonyConfig;
 import com.minelittlepony.ducks.IRenderItem;
 import com.minelittlepony.pony.data.Pony;
+import com.minelittlepony.render.skull.PlayerSkullRenderer;
+import com.minelittlepony.render.skull.SkeletonSkullRenderer;
+import com.minelittlepony.render.skull.WitherSkullRenderer;
+import com.minelittlepony.render.skull.ZombieSkullRenderer;
 import com.mojang.authlib.GameProfile;
 import com.mumfrey.liteloader.util.ModUtilities;
 import net.minecraft.client.renderer.GlStateManager;
@@ -18,16 +15,35 @@ import net.minecraft.client.renderer.tileentity.TileEntitySkullRenderer;
 import net.minecraft.tileentity.TileEntitySkull;
 import net.minecraft.util.EnumFacing;
 import net.minecraft.util.ResourceLocation;
+import org.lwjgl.opengl.GL11;
+
+import java.util.HashMap;
+import java.util.Map;
+import javax.annotation.Nullable;
 
 /**
  * PonySkullRenderer! It renders ponies as skulls, or something...
  */
 public class PonySkullRenderer extends TileEntitySkullRenderer implements IRenderItem {
 
+    private static final int SKELETON = 0;
+    private static final int WITHER = 1;
+    private static final int ZOMBIE = 2;
+    private static final int PLAYER = 3;
+    private static final int CREEPER = 4;
+    private static final int DRAGON = 5;
+
     public static PonySkullRenderer ponyInstance = new PonySkullRenderer();
     private static TileEntitySkullRenderer backup = null;
 
-    private static final Map<Integer, ISkull> skullMap = new HashMap<Integer, ISkull>();
+    private final Map<Integer, ISkull> skullMap = new HashMap<>();
+
+    private PonySkullRenderer() {
+        skullMap.put(SKELETON, new SkeletonSkullRenderer());
+        skullMap.put(WITHER, new WitherSkullRenderer());
+        skullMap.put(ZOMBIE, new ZombieSkullRenderer());
+        skullMap.put(PLAYER, new PlayerSkullRenderer());
+    }
 
     /**
      * Resolves the games skull renderer to either a specialised pony skull renderer
@@ -61,7 +77,7 @@ public class PonySkullRenderer extends TileEntitySkullRenderer implements IRende
     @Override
     public void renderSkull(float x, float y, float z, EnumFacing facing, float rotation, int skullType, @Nullable GameProfile profile, int destroyStage, float animateTicks) {
 
-        ISkull skull = skullMap.getOrDefault(skullType, null);
+        ISkull skull = skullMap.get(skullType);
 
         if (skull == null || !skull.canRender(MineLittlePony.getConfig())) {
             if (backup != null) {
@@ -150,12 +166,6 @@ public class PonySkullRenderer extends TileEntitySkullRenderer implements IRende
      */
     public interface ISkull {
 
-        public static final int SKELETON = 0;
-        public static final int WITHER = 1;
-        public static final int ZOMBIE = 2;
-        public static final int PLAYER = 3;
-        public static final int CREEPER = 4;
-        public static final int DRAGON = 5;
 
         void preRender(boolean transparency);
 
@@ -166,10 +176,5 @@ public class PonySkullRenderer extends TileEntitySkullRenderer implements IRende
         ResourceLocation getSkinResource(@Nullable GameProfile profile);
 
         void bindPony(Pony pony);
-
-        default ISkull register(int metadataId) {
-            PonySkullRenderer.skullMap.put(metadataId, this);
-            return this;
-        }
     }
 }

src/main/java/com/minelittlepony/render/player/RenderPonyPlayer.java

@@ -1,14 +1,9 @@
 package com.minelittlepony.render.player;
 
 import com.minelittlepony.MineLittlePony;
-import com.minelittlepony.PonyConfig;
 import com.minelittlepony.ducks.IRenderPony;
 import com.minelittlepony.model.ModelWrapper;
-import com.minelittlepony.model.components.ModelDeadMau5Ears;
 import com.minelittlepony.pony.data.Pony;
-import com.minelittlepony.pony.data.PonyLevel;
-import com.minelittlepony.render.PonySkull;
-import com.minelittlepony.render.PonySkullRenderer.ISkull;
 import com.minelittlepony.render.RenderPony;
 import com.minelittlepony.render.layer.LayerDJPon3Head;
 import com.minelittlepony.render.layer.LayerEntityOnPonyShoulder;
@@ -17,74 +12,17 @@ import com.minelittlepony.render.layer.LayerPonyArmor;
 import com.minelittlepony.render.layer.LayerPonyCape;
 import com.minelittlepony.render.layer.LayerPonyCustomHead;
 import com.minelittlepony.render.layer.LayerPonyElytra;
-import com.mojang.authlib.GameProfile;
-import com.mojang.authlib.minecraft.MinecraftProfileTexture;
-import com.mojang.authlib.minecraft.MinecraftProfileTexture.Type;
-import com.voxelmodpack.hdskins.HDSkinManager;
-import net.minecraft.client.Minecraft;
 import net.minecraft.client.entity.AbstractClientPlayer;
 import net.minecraft.client.renderer.GlStateManager;
 import net.minecraft.client.renderer.entity.RenderManager;
 import net.minecraft.client.renderer.entity.RenderPlayer;
 import net.minecraft.client.renderer.entity.layers.LayerArrow;
-import net.minecraft.client.resources.DefaultPlayerSkin;
 import net.minecraft.entity.Entity;
-import net.minecraft.entity.player.EntityPlayer;
 import net.minecraft.util.EnumHandSide;
 import net.minecraft.util.ResourceLocation;
 
-import java.util.Map;
-
 public class RenderPonyPlayer extends RenderPlayer implements IRenderPony<AbstractClientPlayer> {
 
-    public static final ISkull SKULL = new PonySkull() {
-
-        private final ModelDeadMau5Ears deadMau5 = new ModelDeadMau5Ears();
-
-        @Override
-        public boolean canRender(PonyConfig config) {
-            return config.getPonyLevel() != PonyLevel.HUMANS;
-        }
-
-        @Override
-        public void preRender(boolean transparency) {
-            GlStateManager.enableBlendProfile(GlStateManager.Profile.PLAYER_SKIN);
-
-            if (!transparency) {
-                RenderPony.enableModelRenderProfile();
-            }
-        }
-
-        @Override
-        public ResourceLocation getSkinResource(GameProfile profile) {
-            if (profile != null) {
-                deadMau5.setVisible("deadmau5".equals(profile.getName()));
-
-                ResourceLocation skin = HDSkinManager.INSTANCE.getTextures(profile).get(Type.SKIN);
-                if (skin != null) {
-                    return skin;
-                }
-
-                Minecraft minecraft = Minecraft.getMinecraft();
-                Map<Type, MinecraftProfileTexture> map = minecraft.getSkinManager().loadSkinFromCache(profile);
-
-                if (map.containsKey(Type.SKIN)) {
-                    return minecraft.getSkinManager().loadSkin(map.get(Type.SKIN), Type.SKIN);
-                } else {
-                    return DefaultPlayerSkin.getDefaultSkin(EntityPlayer.getUUID(profile));
-                }
-            }
-
-            return DefaultPlayerSkin.getDefaultSkinLegacy();
-        }
-
-        @Override
-        public void render(float animateTicks, float rotation, float scale) {
-            super.render(animateTicks, rotation, scale);
-            deadMau5.render(null, animateTicks, 0, 0, rotation, 0, scale);
-        }
-    }.register(ISkull.PLAYER);
-
     protected final RenderPony<AbstractClientPlayer> renderPony = new RenderPony<>(this);
 
     public RenderPonyPlayer(RenderManager manager, boolean useSmallArms, ModelWrapper model) {
@@ -192,4 +130,5 @@ public class RenderPonyPlayer extends RenderPlayer implements IRenderPony<Abstra
     public Pony getEntityPony(AbstractClientPlayer player) {
         return MineLittlePony.getInstance().getManager().getPony(player);
     }
+
 }

src/main/java/com/minelittlepony/render/ponies/RenderPonySkeleton.java

@@ -1,13 +1,8 @@
 package com.minelittlepony.render.ponies;
 
-import com.minelittlepony.PonyConfig;
 import com.minelittlepony.model.PMAPI;
 import com.minelittlepony.render.RenderPonyMob;
-import com.minelittlepony.render.PonySkull;
-import com.minelittlepony.render.PonySkullRenderer.ISkull;
 import com.minelittlepony.render.layer.LayerPonyStrayOverlay;
-import com.mojang.authlib.GameProfile;
-
 import net.minecraft.client.renderer.GlStateManager;
 import net.minecraft.client.renderer.entity.RenderManager;
 import net.minecraft.entity.monster.AbstractSkeleton;
@@ -21,18 +16,6 @@ public class RenderPonySkeleton<Skeleton extends AbstractSkeleton> extends Rende
     public static final ResourceLocation WITHER = new ResourceLocation("minelittlepony", "textures/entity/skeleton/skeleton_wither_pony.png");
     public static final ResourceLocation STRAY = new ResourceLocation("minelittlepony", "textures/entity/skeleton/stray_pony.png");
 
-    public static final ISkull SKULL = new PonySkull() {
-        @Override
-        public boolean canRender(PonyConfig config) {
-            return config.skeletons;
-        }
-
-        @Override
-        public ResourceLocation getSkinResource(GameProfile profile) {
-            return RenderPonySkeleton.SKELETON;
-        }
-    }.register(ISkull.SKELETON);
-
     public RenderPonySkeleton(RenderManager manager) {
         super(manager, PMAPI.skeleton);
     }
@@ -57,18 +40,6 @@ public class RenderPonySkeleton<Skeleton extends AbstractSkeleton> extends Rende
 
     public static class Wither extends RenderPonySkeleton<EntityWitherSkeleton> {
 
-        public static final ISkull SKULL = new PonySkull() {
-            @Override
-            public boolean canRender(PonyConfig config) {
-                return config.skeletons;
-            }
-
-            @Override
-            public ResourceLocation getSkinResource(GameProfile profile) {
-                return RenderPonySkeleton.WITHER;
-            }
-        }.register(ISkull.WITHER);
-
         public Wither(RenderManager rm) {
             super(rm);
         }

src/main/java/com/minelittlepony/render/ponies/RenderPonyZombie.java

@@ -1,12 +1,7 @@
 package com.minelittlepony.render.ponies;
 
-import com.minelittlepony.PonyConfig;
 import com.minelittlepony.model.PMAPI;
 import com.minelittlepony.render.RenderPonyMob;
-import com.minelittlepony.render.PonySkull;
-import com.minelittlepony.render.PonySkullRenderer.ISkull;
-import com.mojang.authlib.GameProfile;
-
 import net.minecraft.client.renderer.GlStateManager;
 import net.minecraft.client.renderer.entity.RenderManager;
 import net.minecraft.entity.monster.EntityGiantZombie;
@@ -19,18 +14,6 @@ public class RenderPonyZombie<Zombie extends EntityZombie> extends RenderPonyMob
     public static final ResourceLocation ZOMBIE = new ResourceLocation("minelittlepony", "textures/entity/zombie/zombie_pony.png");
     public static final ResourceLocation HUSK = new ResourceLocation("minelittlepony", "textures/entity/zombie/husk_pony.png");
 
-    public static final ISkull SKULL = new PonySkull() {
-        @Override
-        public boolean canRender(PonyConfig config) {
-            return config.zombies;
-        }
-
-        @Override
-        public ResourceLocation getSkinResource(GameProfile profile) {
-            return RenderPonyZombie.ZOMBIE;
-        }
-    }.register(ISkull.ZOMBIE);
-
     public RenderPonyZombie(RenderManager manager) {
         super(manager, PMAPI.zombie);
     }

src/main/java/com/minelittlepony/render/skull/PlayerSkullRenderer.java

@@ -0,0 +1,66 @@
+package com.minelittlepony.render.skull;
+
+import com.minelittlepony.PonyConfig;
+import com.minelittlepony.model.components.ModelDeadMau5Ears;
+import com.minelittlepony.pony.data.PonyLevel;
+import com.minelittlepony.render.PonySkull;
+import com.minelittlepony.render.RenderPony;
+import com.mojang.authlib.GameProfile;
+import com.mojang.authlib.minecraft.MinecraftProfileTexture;
+import com.voxelmodpack.hdskins.HDSkinManager;
+import net.minecraft.client.Minecraft;
+import net.minecraft.client.renderer.GlStateManager;
+import net.minecraft.client.resources.DefaultPlayerSkin;
+import net.minecraft.entity.player.EntityPlayer;
+import net.minecraft.util.ResourceLocation;
+
+import java.util.Map;
+import javax.annotation.Nullable;
+
+public class PlayerSkullRenderer extends PonySkull {
+
+    private final ModelDeadMau5Ears deadMau5 = new ModelDeadMau5Ears();
+
+    @Override
+    public boolean canRender(PonyConfig config) {
+        return config.getPonyLevel() != PonyLevel.HUMANS;
+    }
+
+    @Override
+    public void preRender(boolean transparency) {
+        GlStateManager.enableBlendProfile(GlStateManager.Profile.PLAYER_SKIN);
+
+        if (!transparency) {
+            RenderPony.enableModelRenderProfile();
+        }
+    }
+
+    @Override
+    public ResourceLocation getSkinResource(@Nullable GameProfile profile) {
+        if (profile != null) {
+            deadMau5.setVisible("deadmau5".equals(profile.getName()));
+
+            ResourceLocation skin = HDSkinManager.INSTANCE.getTextures(profile).get(MinecraftProfileTexture.Type.SKIN);
+            if (skin != null) {
+                return skin;
+            }
+
+            Minecraft minecraft = Minecraft.getMinecraft();
+            Map<MinecraftProfileTexture.Type, MinecraftProfileTexture> map = minecraft.getSkinManager().loadSkinFromCache(profile);
+
+            if (map.containsKey(MinecraftProfileTexture.Type.SKIN)) {
+                return minecraft.getSkinManager().loadSkin(map.get(MinecraftProfileTexture.Type.SKIN), MinecraftProfileTexture.Type.SKIN);
+            } else {
+                return DefaultPlayerSkin.getDefaultSkin(EntityPlayer.getUUID(profile));
+            }
+        }
+
+        return DefaultPlayerSkin.getDefaultSkinLegacy();
+    }
+
+    @Override
+    public void render(float animateTicks, float rotation, float scale) {
+        super.render(animateTicks, rotation, scale);
+        deadMau5.render(null, animateTicks, 0, 0, rotation, 0, scale);
+    }
+}

src/main/java/com/minelittlepony/render/skull/SkeletonSkullRenderer.java

@@ -0,0 +1,22 @@
+package com.minelittlepony.render.skull;
+
+import com.minelittlepony.PonyConfig;
+import com.minelittlepony.render.PonySkull;
+import com.minelittlepony.render.ponies.RenderPonySkeleton;
+import com.mojang.authlib.GameProfile;
+import net.minecraft.util.ResourceLocation;
+
+import javax.annotation.Nullable;
+
+public class SkeletonSkullRenderer extends PonySkull {
+
+    @Override
+    public boolean canRender(PonyConfig config) {
+        return config.skeletons;
+    }
+
+    @Override
+    public ResourceLocation getSkinResource(@Nullable GameProfile profile) {
+        return RenderPonySkeleton.SKELETON;
+    }
+}

src/main/java/com/minelittlepony/render/skull/WitherSkullRenderer.java

@@ -0,0 +1,22 @@
+package com.minelittlepony.render.skull;
+
+import com.minelittlepony.PonyConfig;
+import com.minelittlepony.render.PonySkull;
+import com.minelittlepony.render.ponies.RenderPonySkeleton;
+import com.mojang.authlib.GameProfile;
+import net.minecraft.util.ResourceLocation;
+
+import javax.annotation.Nullable;
+
+public class WitherSkullRenderer extends PonySkull {
+
+    @Override
+    public boolean canRender(PonyConfig config) {
+        return config.skeletons;
+    }
+
+    @Override
+    public ResourceLocation getSkinResource(@Nullable GameProfile profile) {
+        return RenderPonySkeleton.WITHER;
+    }
+}

src/main/java/com/minelittlepony/render/skull/ZombieSkullRenderer.java

@@ -0,0 +1,22 @@
+package com.minelittlepony.render.skull;
+
+import com.minelittlepony.PonyConfig;
+import com.minelittlepony.render.PonySkull;
+import com.minelittlepony.render.ponies.RenderPonyZombie;
+import com.mojang.authlib.GameProfile;
+import net.minecraft.util.ResourceLocation;
+
+import javax.annotation.Nullable;
+
+public class ZombieSkullRenderer extends PonySkull {
+
+    @Override
+    public boolean canRender(PonyConfig config) {
+        return config.zombies;
+    }
+
+    @Override
+    public ResourceLocation getSkinResource(@Nullable GameProfile profile) {
+        return RenderPonyZombie.ZOMBIE;
+    }
+}

src/main/java/com/minelittlepony/render/skull/package-info.java

@@ -0,0 +1,7 @@
+@MethodsReturnNonnullByDefault
+@ParametersAreNonnullByDefault
+package com.minelittlepony.render.skull;
+
+import mcp.MethodsReturnNonnullByDefault;
+
+import javax.annotation.ParametersAreNonnullByDefault;