Fix top skin layers not being rendered in mob drop recipes

src/main/kotlin/moe/nea/firmament/gui/entity/GuiPlayer.kt

@@ -39,6 +39,10 @@ class GuiPlayer(world: ClientWorld?, profile: GameProfile?) : AbstractClientPlay
         return false
     }
 
+    override fun shouldRenderName(): Boolean {
+        return false
+    }
+
     var skinTexture: Identifier = DefaultSkinHelper.getSkinTextures(this.getUuid()).texture
     var capeTexture: Identifier? = null
     var model: Model = Model.WIDE

src/main/kotlin/moe/nea/firmament/gui/entity/ModifyPlayerSkin.kt

@@ -7,11 +7,17 @@
 package moe.nea.firmament.gui.entity
 
 import com.google.gson.JsonObject
+import com.google.gson.JsonPrimitive
+import kotlin.experimental.and
+import kotlin.experimental.or
 import net.minecraft.client.util.SkinTextures
 import net.minecraft.entity.LivingEntity
+import net.minecraft.entity.player.PlayerEntity
+import net.minecraft.entity.player.PlayerModelPart
 import net.minecraft.util.Identifier
 
 object ModifyPlayerSkin : EntityModifier {
+    val playerModelPartIndex = PlayerModelPart.entries.associateBy { it.getName() }
     override fun apply(entity: LivingEntity, info: JsonObject): LivingEntity {
         require(entity is GuiPlayer)
         info["cape"]?.let {
@@ -24,7 +30,21 @@ object ModifyPlayerSkin : EntityModifier {
             entity.model = if (it.asBoolean) SkinTextures.Model.SLIM else SkinTextures.Model.WIDE
         }
         info["parts"]?.let {
-            // TODO: support parts
+            var trackedData = entity.dataTracker.get(PlayerEntity.PLAYER_MODEL_PARTS)
+            if (it is JsonPrimitive && it.isBoolean) {
+                trackedData = (if (it.asBoolean) -1 else 0).toByte()
+            } else {
+                val obj = it.asJsonObject
+                for ((k, v) in obj.entrySet()) {
+                    val part = playerModelPartIndex[k]!!
+                    trackedData = if (v.asBoolean) {
+                        trackedData and (part.bitFlag.inv().toByte())
+                    } else {
+                        trackedData or (part.bitFlag.toByte())
+                    }
+                }
+            }
+            entity.dataTracker.set(PlayerEntity.PLAYER_MODEL_PARTS, trackedData)
         }
         return entity
     }

src/main/resources/firmament.accesswidener

@@ -19,3 +19,5 @@ accessible method net/minecraft/client/gui/DrawContext drawTexturedQuad (Lnet/mi
 mutable field net/minecraft/screen/slot/Slot x I
 mutable field net/minecraft/screen/slot/Slot y I
 
+accessible field net/minecraft/entity/player/PlayerEntity PLAYER_MODEL_PARTS Lnet/minecraft/entity/data/TrackedData;
+