Refactor source layout

Introduce compat source sets and move all kotlin sources to the main directory

[no changelog]

24 files changed, 1672 insertions, 0 deletions

diff --git a/src/main/kotlin/features/texturepack/AlwaysPredicate.kt b/src/main/kotlin/features/texturepack/AlwaysPredicate.kt
new file mode 100644
index 0000000..4dd28df
--- /dev/null
+++ b/src/main/kotlin/features/texturepack/AlwaysPredicate.kt
@@ -0,0 +1,17 @@
+
+package moe.nea.firmament.features.texturepack
+
+import com.google.gson.JsonElement
+import net.minecraft.item.ItemStack
+
+object AlwaysPredicate : FirmamentModelPredicate {
+    override fun test(stack: ItemStack): Boolean {
+        return true
+    }
+
+    object Parser : FirmamentModelPredicateParser {
+        override fun parse(jsonElement: JsonElement): FirmamentModelPredicate {
+            return AlwaysPredicate
+        }
+    }
+}
diff --git a/src/main/kotlin/features/texturepack/AndPredicate.kt b/src/main/kotlin/features/texturepack/AndPredicate.kt
new file mode 100644
index 0000000..55a4f32
--- /dev/null
+++ b/src/main/kotlin/features/texturepack/AndPredicate.kt
@@ -0,0 +1,26 @@
+
+package moe.nea.firmament.features.texturepack
+
+import com.google.gson.JsonArray
+import com.google.gson.JsonElement
+import com.google.gson.JsonObject
+import net.minecraft.item.ItemStack
+
+class AndPredicate(val children: Array<FirmamentModelPredicate>) : FirmamentModelPredicate {
+    override fun test(stack: ItemStack): Boolean {
+        return children.all { it.test(stack) }
+    }
+
+    object Parser : FirmamentModelPredicateParser {
+        override fun parse(jsonElement: JsonElement): FirmamentModelPredicate {
+            val children =
+                (jsonElement as JsonArray)
+                    .flatMap {
+                        CustomModelOverrideParser.parsePredicates(it as JsonObject)
+                    }
+                    .toTypedArray()
+            return AndPredicate(children)
+        }
+
+    }
+}
diff --git a/src/main/kotlin/features/texturepack/BakedModelExtra.kt b/src/main/kotlin/features/texturepack/BakedModelExtra.kt
new file mode 100644
index 0000000..ae1f6d5
--- /dev/null
+++ b/src/main/kotlin/features/texturepack/BakedModelExtra.kt
@@ -0,0 +1,9 @@
+
+package moe.nea.firmament.features.texturepack
+
+import net.minecraft.client.render.model.BakedModel
+
+interface BakedModelExtra {
+    fun getHeadModel_firmament(): BakedModel?
+    fun setHeadModel_firmament(headModel: BakedModel?)
+}
diff --git a/src/main/kotlin/features/texturepack/BakedOverrideData.kt b/src/main/kotlin/features/texturepack/BakedOverrideData.kt
new file mode 100644
index 0000000..c012883
--- /dev/null
+++ b/src/main/kotlin/features/texturepack/BakedOverrideData.kt
@@ -0,0 +1,8 @@
+
+package moe.nea.firmament.features.texturepack
+
+interface BakedOverrideData {
+    fun getFirmamentOverrides(): Array<FirmamentModelPredicate>?
+    fun setFirmamentOverrides(overrides: Array<FirmamentModelPredicate>?)
+
+}
diff --git a/src/main/kotlin/features/texturepack/CustomBlockTextures.kt b/src/main/kotlin/features/texturepack/CustomBlockTextures.kt
new file mode 100644
index 0000000..0f2c2e6
--- /dev/null
+++ b/src/main/kotlin/features/texturepack/CustomBlockTextures.kt
@@ -0,0 +1,295 @@
+@file:UseSerializers(BlockPosSerializer::class, IdentifierSerializer::class)
+
+package moe.nea.firmament.features.texturepack
+
+import java.util.concurrent.CompletableFuture
+import net.fabricmc.loader.api.FabricLoader
+import kotlinx.serialization.ExperimentalSerializationApi
+import kotlinx.serialization.KSerializer
+import kotlinx.serialization.Serializable
+import kotlinx.serialization.Transient
+import kotlinx.serialization.UseSerializers
+import kotlinx.serialization.descriptors.SerialDescriptor
+import kotlinx.serialization.encoding.Decoder
+import kotlinx.serialization.encoding.Encoder
+import kotlinx.serialization.json.JsonDecoder
+import kotlinx.serialization.json.JsonElement
+import kotlinx.serialization.json.JsonPrimitive
+import kotlinx.serialization.serializer
+import kotlin.jvm.optionals.getOrNull
+import net.minecraft.block.Block
+import net.minecraft.block.BlockState
+import net.minecraft.client.render.model.BakedModel
+import net.minecraft.client.util.ModelIdentifier
+import net.minecraft.registry.RegistryKey
+import net.minecraft.registry.RegistryKeys
+import net.minecraft.resource.ResourceManager
+import net.minecraft.resource.SinglePreparationResourceReloader
+import net.minecraft.util.Identifier
+import net.minecraft.util.math.BlockPos
+import net.minecraft.util.profiler.Profiler
+import moe.nea.firmament.Firmament
+import moe.nea.firmament.annotations.Subscribe
+import moe.nea.firmament.events.BakeExtraModelsEvent
+import moe.nea.firmament.events.EarlyResourceReloadEvent
+import moe.nea.firmament.events.FinalizeResourceManagerEvent
+import moe.nea.firmament.events.SkyblockServerUpdateEvent
+import moe.nea.firmament.features.texturepack.CustomGlobalTextures.logger
+import moe.nea.firmament.util.IdentifierSerializer
+import moe.nea.firmament.util.MC
+import moe.nea.firmament.util.SBData
+import moe.nea.firmament.util.SkyBlockIsland
+import moe.nea.firmament.util.json.BlockPosSerializer
+import moe.nea.firmament.util.json.SingletonSerializableList
+
+
+object CustomBlockTextures {
+    @Serializable
+    data class CustomBlockOverride(
+        val modes: @Serializable(SingletonSerializableList::class) List<String>,
+        val area: List<Area>? = null,
+        val replacements: Map<Identifier, Replacement>,
+    )
+
+    @Serializable(with = Replacement.Serializer::class)
+    data class Replacement(
+        val block: Identifier,
+        val sound: Identifier?,
+    ) {
+
+        @Transient
+        val blockModelIdentifier get() = ModelIdentifier(block.withPrefixedPath("block/"), "firmament")
+
+        @Transient
+        val bakedModel: BakedModel by lazy(LazyThreadSafetyMode.NONE) {
+            MC.instance.bakedModelManager.getModel(blockModelIdentifier)
+        }
+
+        @OptIn(ExperimentalSerializationApi::class)
+        @kotlinx.serialization.Serializer(Replacement::class)
+        object DefaultSerializer : KSerializer<Replacement>
+
+        object Serializer : KSerializer<Replacement> {
+            val delegate = serializer<JsonElement>()
+            override val descriptor: SerialDescriptor
+                get() = delegate.descriptor
+
+            override fun deserialize(decoder: Decoder): Replacement {
+                val jsonElement = decoder.decodeSerializableValue(delegate)
+                if (jsonElement is JsonPrimitive) {
+                    require(jsonElement.isString)
+                    return Replacement(Identifier.tryParse(jsonElement.content)!!, null)
+                }
+                return (decoder as JsonDecoder).json.decodeFromJsonElement(DefaultSerializer, jsonElement)
+            }
+
+            override fun serialize(encoder: Encoder, value: Replacement) {
+                encoder.encodeSerializableValue(DefaultSerializer, value)
+            }
+        }
+    }
+
+    @Serializable
+    data class Area(
+        val min: BlockPos,
+        val max: BlockPos,
+    ) {
+        @Transient
+        val realMin = BlockPos(
+            minOf(min.x, max.x),
+            minOf(min.y, max.y),
+            minOf(min.z, max.z),
+        )
+
+        @Transient
+        val realMax = BlockPos(
+            maxOf(min.x, max.x),
+            maxOf(min.y, max.y),
+            maxOf(min.z, max.z),
+        )
+
+        fun roughJoin(other: Area): Area {
+            return Area(
+                BlockPos(
+                    minOf(realMin.x, other.realMin.x),
+                    minOf(realMin.y, other.realMin.y),
+                    minOf(realMin.z, other.realMin.z),
+                ),
+                BlockPos(
+                    maxOf(realMax.x, other.realMax.x),
+                    maxOf(realMax.y, other.realMax.y),
+                    maxOf(realMax.z, other.realMax.z),
+                )
+            )
+        }
+
+        fun contains(blockPos: BlockPos): Boolean {
+            return (blockPos.x in realMin.x..realMax.x) &&
+                (blockPos.y in realMin.y..realMax.y) &&
+                (blockPos.z in realMin.z..realMax.z)
+        }
+    }
+
+    data class LocationReplacements(
+        val lookup: Map<Block, List<BlockReplacement>>
+    )
+
+    data class BlockReplacement(
+        val checks: List<Area>?,
+        val replacement: Replacement,
+    ) {
+        val roughCheck by lazy(LazyThreadSafetyMode.NONE) {
+            if (checks == null || checks.size < 3) return@lazy null
+            checks.reduce { acc, next -> acc.roughJoin(next) }
+        }
+    }
+
+    data class BakedReplacements(val data: Map<SkyBlockIsland, LocationReplacements>)
+
+    var allLocationReplacements: BakedReplacements = BakedReplacements(mapOf())
+    var currentIslandReplacements: LocationReplacements? = null
+
+    fun refreshReplacements() {
+        val location = SBData.skyblockLocation
+        val replacements =
+            if (CustomSkyBlockTextures.TConfig.enableBlockOverrides) location?.let(allLocationReplacements.data::get)
+            else null
+        val lastReplacements = currentIslandReplacements
+        currentIslandReplacements = replacements
+        if (lastReplacements != replacements) {
+            MC.nextTick {
+                MC.worldRenderer.chunks?.chunks?.forEach {
+                    // false schedules rebuilds outside a 27 block radius to happen async
+                    it.scheduleRebuild(false)
+                }
+                sodiumReloadTask?.run()
+            }
+        }
+    }
+
+    private val sodiumReloadTask = runCatching {
+        Class.forName("moe.nea.firmament.compat.sodium.SodiumChunkReloader").getConstructor().newInstance() as Runnable
+    }.getOrElse {
+        if (FabricLoader.getInstance().isModLoaded("sodium"))
+            logger.error("Could not create sodium chunk reloader")
+        null
+    }
+
+
+    fun matchesPosition(replacement: BlockReplacement, blockPos: BlockPos?): Boolean {
+        if (blockPos == null) return true
+        val rc = replacement.roughCheck
+        if (rc != null && !rc.contains(blockPos)) return false
+        val areas = replacement.checks
+        if (areas != null && !areas.any { it.contains(blockPos) }) return false
+        return true
+    }
+
+    @JvmStatic
+    fun getReplacementModel(block: BlockState, blockPos: BlockPos?): BakedModel? {
+        return getReplacement(block, blockPos)?.bakedModel
+    }
+
+    @JvmStatic
+    fun getReplacement(block: BlockState, blockPos: BlockPos?): Replacement? {
+        if (isInFallback() && blockPos == null) return null
+        val replacements = currentIslandReplacements?.lookup?.get(block.block) ?: return null
+        for (replacement in replacements) {
+            if (replacement.checks == null || matchesPosition(replacement, blockPos))
+                return replacement.replacement
+        }
+        return null
+    }
+
+
+    @Subscribe
+    fun onLocation(event: SkyblockServerUpdateEvent) {
+        refreshReplacements()
+    }
+
+    @Volatile
+    var preparationFuture: CompletableFuture<BakedReplacements> = CompletableFuture.completedFuture(BakedReplacements(
+        mapOf()))
+
+    val insideFallbackCall = ThreadLocal.withInitial { 0 }
+
+    @JvmStatic
+    fun enterFallbackCall() {
+        insideFallbackCall.set(insideFallbackCall.get() + 1)
+    }
+
+    fun isInFallback() = insideFallbackCall.get() > 0
+
+    @JvmStatic
+    fun exitFallbackCall() {
+        insideFallbackCall.set(insideFallbackCall.get() - 1)
+    }
+
+    @Subscribe
+    fun onEarlyReload(event: EarlyResourceReloadEvent) {
+        preparationFuture = CompletableFuture
+            .supplyAsync(
+                { prepare(event.resourceManager) }, event.preparationExecutor)
+    }
+
+    @Subscribe
+    fun bakeExtraModels(event: BakeExtraModelsEvent) {
+        preparationFuture.join().data.values
+            .flatMap { it.lookup.values }
+            .flatten()
+            .mapTo(mutableSetOf()) { it.replacement.blockModelIdentifier }
+            .forEach { event.addNonItemModel(it) }
+    }
+
+    private fun prepare(manager: ResourceManager): BakedReplacements {
+        val resources = manager.findResources("overrides/blocks") {
+            it.namespace == "firmskyblock" && it.path.endsWith(".json")
+        }
+        val map = mutableMapOf<SkyBlockIsland, MutableMap<Block, MutableList<BlockReplacement>>>()
+        for ((file, resource) in resources) {
+            val json =
+                Firmament.tryDecodeJsonFromStream<CustomBlockOverride>(resource.inputStream)
+                    .getOrElse { ex ->
+                        logger.error("Failed to load block texture override at $file", ex)
+                        continue
+                    }
+            for (mode in json.modes) {
+                val island = SkyBlockIsland.forMode(mode)
+                val islandMpa = map.getOrPut(island, ::mutableMapOf)
+                for ((blockId, replacement) in json.replacements) {
+                    val block = MC.defaultRegistries.getWrapperOrThrow(RegistryKeys.BLOCK)
+                        .getOptional(RegistryKey.of(RegistryKeys.BLOCK, blockId))
+                        .getOrNull()
+                    if (block == null) {
+                        logger.error("Failed to load block texture override at ${file}: unknown block '$blockId'")
+                        continue
+                    }
+                    val replacements = islandMpa.getOrPut(block.value(), ::mutableListOf)
+                    replacements.add(BlockReplacement(json.area, replacement))
+                }
+            }
+        }
+
+        return BakedReplacements(map.mapValues { LocationReplacements(it.value) })
+    }
+
+    @JvmStatic
+    fun patchIndigo(orig: BakedModel, pos: BlockPos, state: BlockState): BakedModel {
+        return getReplacementModel(state, pos) ?: orig
+    }
+
+    @Subscribe
+    fun onStart(event: FinalizeResourceManagerEvent) {
+        event.resourceManager.registerReloader(object :
+                                                   SinglePreparationResourceReloader<BakedReplacements>() {
+            override fun prepare(manager: ResourceManager, profiler: Profiler): BakedReplacements {
+                return preparationFuture.join()
+            }
+
+            override fun apply(prepared: BakedReplacements, manager: ResourceManager, profiler: Profiler?) {
+                allLocationReplacements = prepared
+                refreshReplacements()
+            }
+        })
+    }
+}
diff --git a/src/main/kotlin/features/texturepack/CustomGlobalArmorOverrides.kt b/src/main/kotlin/features/texturepack/CustomGlobalArmorOverrides.kt
new file mode 100644
index 0000000..23577ee
--- /dev/null
+++ b/src/main/kotlin/features/texturepack/CustomGlobalArmorOverrides.kt
@@ -0,0 +1,106 @@
+
+@file:UseSerializers(IdentifierSerializer::class)
+
+package moe.nea.firmament.features.texturepack
+
+import kotlinx.serialization.SerialName
+import kotlinx.serialization.Serializable
+import kotlinx.serialization.Transient
+import kotlinx.serialization.UseSerializers
+import net.minecraft.item.ArmorMaterial
+import net.minecraft.item.ItemStack
+import net.minecraft.resource.ResourceManager
+import net.minecraft.resource.SinglePreparationResourceReloader
+import net.minecraft.util.Identifier
+import net.minecraft.util.profiler.Profiler
+import moe.nea.firmament.Firmament
+import moe.nea.firmament.annotations.Subscribe
+import moe.nea.firmament.events.FinalizeResourceManagerEvent
+import moe.nea.firmament.events.subscription.SubscriptionOwner
+import moe.nea.firmament.features.FirmamentFeature
+import moe.nea.firmament.features.texturepack.CustomGlobalTextures.logger
+import moe.nea.firmament.util.IdentifierSerializer
+import moe.nea.firmament.util.IdentityCharacteristics
+import moe.nea.firmament.util.computeNullableFunction
+import moe.nea.firmament.util.skyBlockId
+
+object CustomGlobalArmorOverrides : SubscriptionOwner {
+    @Serializable
+    data class ArmorOverride(
+        @SerialName("item_ids")
+        val itemIds: List<String>,
+        val layers: List<ArmorOverrideLayer>,
+        val overrides: List<ArmorOverrideOverride> = listOf(),
+    ) {
+        @Transient
+        val bakedLayers = bakeLayers(layers)
+    }
+
+    fun bakeLayers(layers: List<ArmorOverrideLayer>): List<ArmorMaterial.Layer> {
+        return layers.map { ArmorMaterial.Layer(it.identifier, it.suffix, it.tint) }
+    }
+
+    @Serializable
+    data class ArmorOverrideLayer(
+        val tint: Boolean = false,
+        val identifier: Identifier,
+        val suffix: String = "",
+    )
+
+    @Serializable
+    data class ArmorOverrideOverride(
+        val predicate: FirmamentModelPredicate,
+        val layers: List<ArmorOverrideLayer>,
+    ) {
+        @Transient
+        val bakedLayers = bakeLayers(layers)
+    }
+
+    override val delegateFeature: FirmamentFeature
+        get() = CustomSkyBlockTextures
+
+    val overrideCache = mutableMapOf<IdentityCharacteristics<ItemStack>, Any>()
+
+    @JvmStatic
+    fun overrideArmor(stack: ItemStack): List<ArmorMaterial.Layer>? {
+        if (!CustomSkyBlockTextures.TConfig.enableArmorOverrides) return null
+        return overrideCache.computeNullableFunction(IdentityCharacteristics(stack)) {
+            val id = stack.skyBlockId ?: return@computeNullableFunction null
+            val override = overrides[id.neuItem] ?: return@computeNullableFunction null
+            for (suboverride in override.overrides) {
+                if (suboverride.predicate.test(stack)) {
+                    return@computeNullableFunction suboverride.bakedLayers
+                }
+            }
+            return@computeNullableFunction override.bakedLayers
+        }
+    }
+
+    var overrides: Map<String, ArmorOverride> = mapOf()
+
+    @Subscribe
+    fun onStart(event: FinalizeResourceManagerEvent) {
+        event.resourceManager.registerReloader(object :
+                                                   SinglePreparationResourceReloader<Map<String, ArmorOverride>>() {
+            override fun prepare(manager: ResourceManager, profiler: Profiler): Map<String, ArmorOverride> {
+                val overrideFiles = manager.findResources("overrides/armor_models") {
+                    it.namespace == "firmskyblock" && it.path.endsWith(".json")
+                }
+                val overrides = overrideFiles.mapNotNull {
+                    Firmament.tryDecodeJsonFromStream<ArmorOverride>(it.value.inputStream).getOrElse { ex ->
+                        logger.error("Failed to load armor texture override at ${it.key}", ex)
+                        null
+                    }
+                }
+                val associatedMap = overrides.flatMap { obj -> obj.itemIds.map { it to obj } }
+                    .toMap()
+                return associatedMap
+            }
+
+            override fun apply(prepared: Map<String, ArmorOverride>, manager: ResourceManager, profiler: Profiler) {
+                overrides = prepared
+            }
+        })
+    }
+
+}
diff --git a/src/main/kotlin/features/texturepack/CustomGlobalTextures.kt b/src/main/kotlin/features/texturepack/CustomGlobalTextures.kt
new file mode 100644
index 0000000..d64c844
--- /dev/null
+++ b/src/main/kotlin/features/texturepack/CustomGlobalTextures.kt
@@ -0,0 +1,167 @@
+
+@file:UseSerializers(IdentifierSerializer::class, CustomModelOverrideParser.FirmamentRootPredicateSerializer::class)
+
+package moe.nea.firmament.features.texturepack
+
+
+import java.util.concurrent.CompletableFuture
+import org.slf4j.LoggerFactory
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable
+import kotlinx.serialization.Serializable
+import kotlinx.serialization.UseSerializers
+import kotlin.jvm.optionals.getOrNull
+import net.minecraft.client.render.item.ItemModels
+import net.minecraft.client.render.model.BakedModel
+import net.minecraft.client.util.ModelIdentifier
+import net.minecraft.item.ItemStack
+import net.minecraft.resource.ResourceManager
+import net.minecraft.resource.SinglePreparationResourceReloader
+import net.minecraft.text.Text
+import net.minecraft.util.Identifier
+import net.minecraft.util.profiler.Profiler
+import moe.nea.firmament.Firmament
+import moe.nea.firmament.annotations.Subscribe
+import moe.nea.firmament.events.BakeExtraModelsEvent
+import moe.nea.firmament.events.EarlyResourceReloadEvent
+import moe.nea.firmament.events.FinalizeResourceManagerEvent
+import moe.nea.firmament.events.ScreenChangeEvent
+import moe.nea.firmament.events.subscription.SubscriptionOwner
+import moe.nea.firmament.features.FirmamentFeature
+import moe.nea.firmament.util.IdentifierSerializer
+import moe.nea.firmament.util.IdentityCharacteristics
+import moe.nea.firmament.util.MC
+import moe.nea.firmament.util.computeNullableFunction
+import moe.nea.firmament.util.json.SingletonSerializableList
+import moe.nea.firmament.util.runNull
+
+object CustomGlobalTextures : SinglePreparationResourceReloader<CustomGlobalTextures.CustomGuiTextureOverride>(),
+    SubscriptionOwner {
+    override val delegateFeature: FirmamentFeature
+        get() = CustomSkyBlockTextures
+
+    class CustomGuiTextureOverride(
+        val classes: List<ItemOverrideCollection>
+    )
+
+    @Serializable
+    data class GlobalItemOverride(
+        val screen: @Serializable(SingletonSerializableList::class) List<Identifier>,
+        val model: Identifier,
+        val predicate: FirmamentModelPredicate,
+    )
+
+    @Serializable
+    data class ScreenFilter(
+        val title: StringMatcher,
+    )
+
+    data class ItemOverrideCollection(
+        val screenFilter: ScreenFilter,
+        val overrides: List<GlobalItemOverride>,
+    )
+
+    @Subscribe
+    fun onStart(event: FinalizeResourceManagerEvent) {
+        MC.resourceManager.registerReloader(this)
+    }
+
+    @Subscribe
+    fun onEarlyReload(event: EarlyResourceReloadEvent) {
+        preparationFuture = CompletableFuture
+            .supplyAsync(
+                {
+                    prepare(event.resourceManager)
+                }, event.preparationExecutor)
+    }
+
+    @Subscribe
+    fun onBakeModels(event: BakeExtraModelsEvent) {
+        for (guiClassOverride in preparationFuture.join().classes) {
+            for (override in guiClassOverride.overrides) {
+                event.addItemModel(ModelIdentifier(override.model, "inventory"))
+            }
+        }
+    }
+
+    @Volatile
+    var preparationFuture: CompletableFuture<CustomGuiTextureOverride> = CompletableFuture.completedFuture(
+        CustomGuiTextureOverride(listOf()))
+
+    override fun prepare(manager: ResourceManager?, profiler: Profiler?): CustomGuiTextureOverride {
+        return preparationFuture.join()
+    }
+
+    override fun apply(prepared: CustomGuiTextureOverride, manager: ResourceManager?, profiler: Profiler?) {
+        this.guiClassOverrides = prepared
+    }
+
+    val logger = LoggerFactory.getLogger(CustomGlobalTextures::class.java)
+    fun prepare(manager: ResourceManager): CustomGuiTextureOverride {
+        val overrideResources =
+            manager.findResources("overrides/item") { it.namespace == "firmskyblock" && it.path.endsWith(".json") }
+                .mapNotNull {
+                    Firmament.tryDecodeJsonFromStream<GlobalItemOverride>(it.value.inputStream).getOrElse { ex ->
+                        logger.error("Failed to load global item override at ${it.key}", ex)
+                        null
+                    }
+                }
+
+        val byGuiClass = overrideResources.flatMap { override -> override.screen.toSet().map { it to override } }
+            .groupBy { it.first }
+        val guiClasses = byGuiClass.entries
+            .mapNotNull {
+                val key = it.key
+                val guiClassResource =
+                    manager.getResource(Identifier.of(key.namespace, "filters/screen/${key.path}.json"))
+                        .getOrNull()
+                        ?: return@mapNotNull runNull {
+                            logger.error("Failed to locate screen filter at $key")
+                        }
+                val screenFilter =
+                    Firmament.tryDecodeJsonFromStream<ScreenFilter>(guiClassResource.inputStream)
+                        .getOrElse { ex ->
+                            logger.error("Failed to load screen filter at $key", ex)
+                            return@mapNotNull null
+                        }
+                ItemOverrideCollection(screenFilter, it.value.map { it.second })
+            }
+        logger.info("Loaded ${overrideResources.size} global item overrides")
+        return CustomGuiTextureOverride(guiClasses)
+    }
+
+    var guiClassOverrides = CustomGuiTextureOverride(listOf())
+
+    var matchingOverrides: Set<ItemOverrideCollection> = setOf()
+
+    @Subscribe
+    fun onOpenGui(event: ScreenChangeEvent) {
+        val newTitle = event.new?.title ?: Text.empty()
+        matchingOverrides = guiClassOverrides.classes
+            .filterTo(mutableSetOf()) { it.screenFilter.title.matches(newTitle) }
+    }
+
+    val overrideCache = mutableMapOf<IdentityCharacteristics<ItemStack>, Any>()
+
+    @JvmStatic
+    fun replaceGlobalModel(
+        models: ItemModels,
+        stack: ItemStack,
+        cir: CallbackInfoReturnable<BakedModel>
+    ) {
+        val value = overrideCache.computeNullableFunction(IdentityCharacteristics(stack)) {
+            for (guiClassOverride in matchingOverrides) {
+                for (override in guiClassOverride.overrides) {
+                    if (override.predicate.test(stack)) {
+                        return@computeNullableFunction models.modelManager.getModel(
+                            ModelIdentifier(override.model, "inventory"))
+                    }
+                }
+            }
+            null
+        }
+        if (value != null)
+            cir.returnValue = value
+    }
+
+
+}
diff --git a/src/main/kotlin/features/texturepack/CustomModelOverrideParser.kt b/src/main/kotlin/features/texturepack/CustomModelOverrideParser.kt
new file mode 100644
index 0000000..a4e7c02
--- /dev/null
+++ b/src/main/kotlin/features/texturepack/CustomModelOverrideParser.kt
@@ -0,0 +1,74 @@
+
+package moe.nea.firmament.features.texturepack
+
+import com.google.gson.JsonObject
+import kotlinx.serialization.KSerializer
+import kotlinx.serialization.descriptors.SerialDescriptor
+import kotlinx.serialization.encoding.Decoder
+import kotlinx.serialization.encoding.Encoder
+import net.minecraft.item.ItemStack
+import net.minecraft.util.Identifier
+
+object CustomModelOverrideParser {
+    object FirmamentRootPredicateSerializer : KSerializer<FirmamentModelPredicate> {
+        val delegateSerializer = kotlinx.serialization.json.JsonObject.serializer()
+        override val descriptor: SerialDescriptor
+            get() = SerialDescriptor("FirmamentModelRootPredicate", delegateSerializer.descriptor)
+
+        override fun deserialize(decoder: Decoder): FirmamentModelPredicate {
+            val json = decoder.decodeSerializableValue(delegateSerializer).intoGson() as JsonObject
+            return AndPredicate(parsePredicates(json).toTypedArray())
+        }
+
+        override fun serialize(encoder: Encoder, value: FirmamentModelPredicate) {
+            TODO("Cannot serialize firmament predicates")
+        }
+    }
+
+    val predicateParsers = mutableMapOf<Identifier, FirmamentModelPredicateParser>()
+
+
+    fun registerPredicateParser(name: String, parser: FirmamentModelPredicateParser) {
+        predicateParsers[Identifier.of("firmament", name)] = parser
+    }
+
+    init {
+        registerPredicateParser("display_name", DisplayNamePredicate.Parser)
+        registerPredicateParser("lore", LorePredicate.Parser)
+        registerPredicateParser("all", AndPredicate.Parser)
+        registerPredicateParser("any", OrPredicate.Parser)
+        registerPredicateParser("not", NotPredicate.Parser)
+        registerPredicateParser("item", ItemPredicate.Parser)
+        registerPredicateParser("extra_attributes", ExtraAttributesPredicate.Parser)
+        registerPredicateParser("pet", PetPredicate.Parser)
+    }
+
+    private val neverPredicate = listOf(
+        object : FirmamentModelPredicate {
+            override fun test(stack: ItemStack): Boolean {
+                return false
+            }
+        }
+    )
+
+    fun parsePredicates(predicates: JsonObject): List<FirmamentModelPredicate> {
+        val parsedPredicates = mutableListOf<FirmamentModelPredicate>()
+        for (predicateName in predicates.keySet()) {
+