Remove QuadEmitter

And remove EMI support. I'm not sure it survived the 1.21.4 recipe
changes :(.

.editorconfig

@@ -27,7 +27,7 @@ indent_size = 2
 [*.yml]
 indent_size = 2
 
-[{*.kt,*.kts}]
+[*.{kt,kts}]
 ij_kotlin_code_style_defaults = KOTLIN_OFFICIAL
 ij_kotlin_continuation_indent_size = 4
 ij_kotlin_spaces_around_equality_operators = true
@@ -39,3 +39,14 @@ ij_kotlin_allow_trailing_comma_on_call_site = true
 ij_kotlin_method_parameters_wrap = off
 ij_kotlin_call_parameters_wrap = off
 ij_kotlin_extends_list_wrap = off
+
+ktlint_code_style = intellij_idea
+ktlint_standard_class-naming = disabled
+ktlint_standard_class-signature = disabled
+ktlint_standard_function-naming = disabled
+ktlint_standard_no-wildcard-imports = disabled
+
+# FIXME: These two are disable right now as they're over-eager in putting things
+#  on the same line. We should set max_line_length and handle this properly.
+ktlint_standard_function-signature = disabled
+ktlint_standard_function-expression-body = disabled

.github/ISSUE_TEMPLATE/bug_report.yaml

@@ -11,7 +11,8 @@ body:
         What version of Minecraft are you using? If your version is not listed, please try to reproduce on one of the supported versions.
     options:
       - 1.20.1
-      - 1.21.x
+      - 1.21.1
+      - 1.21.7
   validations:
     required: true
 - type: input

CONTRIBUTING.md

@@ -88,8 +88,8 @@ You'll first need to [set up a development environment as above](#setting-up-a-d
 
 Once this is set up, you can now run `./gradlew docWebsite`. This generates documentation from our Lua and Java code,
 writing the resulting HTML into `./projects/web/build/site`, which can then be opened in a browser. When iterating on
-documentation, you can instead run `./gradlew docWebsite -t`, which will rebuild documentation every time you change a
-file.
+documentation, you can instead run `./gradlew :web:assemble -x :web:compileTeaVM -t`, which will rebuild documentation
+every time you change a file.
 
 Documentation is built using [illuaminate] which, while not currently documented (somewhat ironic), is largely the same
 as [ldoc][ldoc]. Documentation comments are written in Markdown, though note that we do not support many GitHub-specific

buildSrc/build.gradle.kts

@@ -25,6 +25,7 @@ repositories {
         name = "Fabric"
         content {
             includeGroup("net.fabricmc")
+            includeGroup("net.fabricmc.unpick")
         }
     }
 

buildSrc/src/main/kotlin/cc-tweaked.fabric.gradle.kts

@@ -4,10 +4,7 @@
 
 /** Default configuration for Fabric projects. */
 
-import cc.tweaked.gradle.CCTweakedExtension
-import cc.tweaked.gradle.CCTweakedPlugin
-import cc.tweaked.gradle.IdeaRunConfigurations
-import cc.tweaked.gradle.MinecraftConfigurations
+import cc.tweaked.gradle.*
 
 plugins {
     `java-library`
@@ -67,3 +64,9 @@ dependencies {
 tasks.ideaSyncTask {
     doLast { IdeaRunConfigurations(project).patch() }
 }
+
+tasks.named("checkDependencyConsistency", DependencyCheck::class.java) {
+    val libs = project.extensions.getByType<VersionCatalogsExtension>().named("libs")
+    // Minecraft depends on asm, but Fabric forces it to a more recent version
+    override(libs.findLibrary("asm").get(), "9.9")
+}

buildSrc/src/main/kotlin/cc-tweaked.forge.gradle.kts

@@ -6,7 +6,6 @@
 
 import cc.tweaked.gradle.CCTweakedExtension
 import cc.tweaked.gradle.CCTweakedPlugin
-import cc.tweaked.gradle.IdeaRunConfigurations
 import cc.tweaked.gradle.MinecraftConfigurations
 
 plugins {

buildSrc/src/main/kotlin/cc-tweaked.java-convention.gradle.kts

@@ -29,7 +29,7 @@ base.archivesName.convention("cc-tweaked-$mcVersion-${project.name}")
 
 java {
     toolchain {
-        languageVersion= CCTweakedPlugin.JAVA_VERSION
+        languageVersion = CCTweakedPlugin.JAVA_VERSION
     }
 
     withSourcesJar()
@@ -50,7 +50,6 @@ repositories {
             includeGroup("com.simibubi.create")
             includeGroup("net.commoble.morered")
             includeGroup("dev.architectury")
-            includeGroup("dev.emi")
             includeGroup("maven.modrinth")
             includeGroup("me.shedaniel.cloth")
             includeGroup("me.shedaniel")
@@ -93,6 +92,7 @@ sourceSets.all {
             check("InvalidBlockTag", CheckSeverity.OFF) // Broken by @cc.xyz
             check("InlineMeSuggester", CheckSeverity.OFF) // Minecraft uses @Deprecated liberally
             // Too many false positives right now. Maybe we need an indirection for it later on.
+            check("AssignmentExpression", CheckSeverity.OFF) // I'm a bad person.
             check("ReferenceEquality", CheckSeverity.OFF)
             check("EnumOrdinal", CheckSeverity.OFF) // For now. We could replace most of these with EnumMap.
             check("OperatorPrecedence", CheckSeverity.OFF) // For now.
@@ -121,7 +121,6 @@ tasks.compileTestJava {
     }
 }
 
-
 tasks.withType(JavaCompile::class.java).configureEach {
     options.encoding = "UTF-8"
 }
@@ -170,7 +169,7 @@ tasks.test {
 
 tasks.withType(JacocoReport::class.java).configureEach {
     reports.xml.required = true
-    reports.html.required =true
+    reports.html.required = true
 }
 
 project.plugins.withType(CCTweakedPlugin::class.java) {
@@ -194,30 +193,23 @@ spotless {
     fun FormatExtension.defaults() {
         endWithNewline()
         trimTrailingWhitespace()
-        indentWithSpaces(4)
+        leadingTabsToSpaces(4)
     }
 
     java {
         defaults()
+        importOrder("", "javax|java", "\\#")
         removeUnusedImports()
     }
 
-    val ktlintConfig = mapOf(
-        "ktlint_standard_no-wildcard-imports" to "disabled",
-        "ktlint_standard_class-naming" to "disabled",
-        "ktlint_standard_function-naming" to "disabled",
-        "ij_kotlin_allow_trailing_comma" to "true",
-        "ij_kotlin_allow_trailing_comma_on_call_site" to "true",
-    )
-
     kotlinGradle {
         defaults()
-        ktlint().editorConfigOverride(ktlintConfig)
+        ktlint()
     }
 
     kotlin {
         defaults()
-        ktlint().editorConfigOverride(ktlintConfig)
+        ktlint()
     }
 }
 

buildSrc/src/main/kotlin/cc/tweaked/gradle/ExecTasks.kt

@@ -5,10 +5,8 @@
 package cc.tweaked.gradle
 
 import org.gradle.api.file.DirectoryProperty
-import org.gradle.api.provider.Property
 import org.gradle.api.tasks.AbstractExecTask
 import org.gradle.api.tasks.OutputDirectory
-import java.io.File
 
 abstract class ExecToDir : AbstractExecTask<ExecToDir>(ExecToDir::class.java) {
     @get:OutputDirectory

buildSrc/src/main/kotlin/cc/tweaked/gradle/IdeaRunConfigurations.kt

@@ -25,7 +25,6 @@ import javax.xml.xpath.XPathFactory
  * Would be good to PR some (or all) of these changes upstream at some point.
  *
  * @see net.fabricmc.loom.configuration.ide.idea.IdeaSyncTask
- * @see net.minecraftforge.gradle.common.util.runs.IntellijRunGenerator
  */
 internal class IdeaRunConfigurations(project: Project) {
     private val rootProject = project.rootProject
@@ -35,22 +34,6 @@ internal class IdeaRunConfigurations(project: Project) {
     private val writer = TransformerFactory.newInstance().newTransformer()
 
     private val ideaDir = rootProject.file(".idea/")
-    private val buildDir: Lazy<String?> = lazy {
-        val ideaMisc = ideaDir.resolve("misc.xml")
-
-        try {
-            val doc = Files.newBufferedReader(ideaMisc.toPath()).use {
-                documentBuilder.parse(InputSource(it))
-            }
-            val node =
-                xpath.evaluate("//component[@name=\"ProjectRootManager\"]/output", doc, XPathConstants.NODE) as Node
-            val attr = node.attributes.getNamedItem("url") as Attr
-            attr.value.removePrefix("file://")
-        } catch (e: Exception) {
-            LOGGER.error("Failed to find root directory", e)
-            null
-        }
-    }
 
     fun patch() = synchronized(LOCK) {
         val runConfigDir = ideaDir.resolve("runConfigurations")
@@ -58,10 +41,9 @@ internal class IdeaRunConfigurations(project: Project) {
 
         Files.list(runConfigDir.toPath()).use {
             for (configuration in it) {
-                val filename = configuration.fileName.toString();
+                val filename = configuration.fileName.toString()
                 when {
                     filename.endsWith("_fabric.xml") -> patchFabric(configuration)
-                    filename.startsWith("forge_") && filename.endsWith(".xml") -> patchForge(configuration)
                     else -> {}
                 }
             }
@@ -72,65 +54,6 @@ internal class IdeaRunConfigurations(project: Project) {
         setXml("//configuration", "folderName") { "Fabric" }
     }
 
-    private fun patchForge(path: Path) = withXml(path) {
-        val configId = path.fileName.toString().removePrefix("forge_").removeSuffix(".xml")
-        val sourceSet = forgeConfigs[configId]
-        if (sourceSet == null) {
-            LOGGER.error("[{}] Cannot map run configuration to a known source set", path)
-            return@withXml
-        }
-
-        setXml("//configuration", "folderName") { "Forge" }
-        setXml("//configuration/module", "name") { "${rootProject.name}.forge.$sourceSet" }
-
-        if (buildDir.value == null) return@withXml
-        setXml("//configuration/envs/env[@name=\"MOD_CLASSES\"]", "value") { classpath ->
-            val classes = classpath!!.split(':')
-            val newClasses = mutableListOf<String>()
-            fun appendUnique(x: String) {
-                if (!newClasses.contains(x)) newClasses.add(x)
-            }
-
-            for (entry in classes) {
-                if (!entry.contains("/out/")) {
-                    appendUnique(entry)
-                    continue
-                }
-
-                val match = CLASSPATH_ENTRY.matchEntire(entry)
-                if (match != null) {
-                    val modId = match.groups["modId"]!!.value
-                    val proj = match.groups["proj"]!!.value
-                    var component = match.groups["component"]!!.value
-                    if (component == "production") component = "main"
-
-                    appendUnique(forgeModEntry(modId, proj, component))
-                } else {
-                    LOGGER.warn("[{}] Unknown classpath entry {}", path, entry)
-                    appendUnique(entry)
-                }
-            }
-
-            // Ensure common code is on the classpath
-            for (proj in listOf("common", "common-api")) {
-                for (component in listOf("main", "client")) {
-                    appendUnique(forgeModEntry("computercraft", proj, component))
-                }
-            }
-
-            if (newClasses.any { it.startsWith("cctest%%") }) {
-                appendUnique(forgeModEntry("cctest", "core", "testFixtures"))
-                appendUnique(forgeModEntry("cctest", "common", "testFixtures"))
-                appendUnique(forgeModEntry("cctest", "common", "testMod"))
-            }
-
-            newClasses.joinToString(":")
-        }
-    }
-
-    private fun forgeModEntry(mod: String, project: String, component: String) =
-        "$mod%%${buildDir.value}/production/${rootProject.name}.$project.$component"
-
     private fun LocatedDocument.setXml(xpath: String, attribute: String, value: (String?) -> String) {
         val node = this@IdeaRunConfigurations.xpath.evaluate(xpath, document, XPathConstants.NODE) as Node?
         if (node == null) {
@@ -159,16 +82,5 @@ internal class IdeaRunConfigurations(project: Project) {
     companion object {
         private val LOGGER = Logging.getLogger(IdeaRunConfigurations::class.java)
         private val LOCK = Any()
-
-        private val CLASSPATH_ENTRY =
-            Regex("(?<modId>[a-z]+)%%\\\$PROJECT_DIR\\\$/projects/(?<proj>[a-z-]+)/out/(?<component>\\w+)/(?<type>[a-z]+)\$")
-
-        private val forgeConfigs = mapOf(
-            "runClient" to "client",
-            "runData" to "main",
-            "runGameTestServer" to "testMod",
-            "runServer" to "main",
-            "runTestClient" to "testMod",
-        )
     }
 }

buildSrc/src/main/kotlin/cc/tweaked/gradle/XmlUtil.kt

@@ -1,16 +0,0 @@
-// SPDX-FileCopyrightText: 2022 The CC: Tweaked Developers
-//
-// SPDX-License-Identifier: MPL-2.0
-
-package cc.tweaked.gradle
-
-import groovy.util.Node
-import groovy.util.NodeList
-
-object XmlUtil {
-    fun findChild(node: Node, name: String): Node? = when (val child = node.get(name)) {
-        is Node -> child
-        is NodeList -> child.singleOrNull() as Node?
-        else -> null
-    }
-}

config/checkstyle/checkstyle.xml

@@ -129,7 +129,7 @@ SPDX-License-Identifier: MPL-2.0
         <module name="LocalFinalVariableName" />
         <module name="LocalVariableName" />
         <module name="MemberName">
-            <property name="format" value="^\$?[a-z][a-zA-Z0-9]*$" />
+            <property name="format" value="^(computercraft\$|\$)?[a-z][a-zA-Z0-9]*$" />
         </module>
         <module name="MethodName">
             <property name="format" value="^(computercraft\$)?[a-z][a-zA-Z0-9]*$" />

crowdin.yml

@@ -12,6 +12,7 @@ files:
         de: de_de    # German
         es-ES: es_es # Spanish
         fr: fr_fr    # French
+        hu: hu_hu    # Hungarian
         it: it_it    # Italian
         ja: ja_jp    # Japanese
         ko: ko_kr    # Korean

gradle.properties

@@ -12,7 +12,7 @@ neogradle.subsystems.conventions.runs.enabled=false
 
 # Mod properties
 isUnstable=true
-modVersion=1.115.1
+modVersion=1.116.1
 
 # Minecraft properties: We want to configure this here so we can read it in settings.gradle
-mcVersion=1.21.1
+mcVersion=1.21.10

gradle/libs.versions.toml

@@ -7,26 +7,26 @@
 # Minecraft
 # MC version is specified in gradle.properties, as we need that in settings.gradle.
 # Remember to update corresponding versions in fabric.mod.json/neoforge.mods.toml
-fabric-api = "0.102.1+1.21.1"
-fabric-loader = "0.15.11"
-neoForge = "21.1.9"
-neoForgeSpi = "8.0.1"
+fabric-api = "0.135.0+1.21.10"
+fabric-loader = "0.17.3"
+neoForge = "21.10.6-beta"
+neoMergeTool = "2.0.0"
 mixin = "0.8.5"
-parchment = "2024.07.28"
-parchmentMc = "1.21"
-yarn = "1.21.1+build.1"
+parchment = "2025.10.12"
+parchmentMc = "1.21.10"
+yarn = "1.21.10+build.2"
 
 # Core dependencies (these versions are tied to the version Minecraft uses)
-fastutil = "8.5.12"
-guava = "32.1.2-jre"
-netty = "4.1.97.Final"
-slf4j = "2.0.9"
+fastutil = "8.5.15"
+guava = "33.3.1-jre"
+netty = "4.1.118.Final"
+slf4j = "2.0.16"
 
 # Core dependencies (independent of Minecraft)
-asm = "9.6"
+asm = "9.7.1"
 autoService = "1.1.1"
 checkerFramework = "3.42.0"
-cobalt = { strictly = "0.9.5" }
+cobalt = { strictly = "0.9.6" }
 commonsCli = "1.6.0"
 jetbrainsAnnotations = "24.1.0"
 jspecify = "1.0.0"
@@ -36,16 +36,15 @@ kotlin-coroutines = "1.10.1"
 nightConfig = "3.8.1"
 
 # Minecraft mods
-emi = "1.1.7+1.21"
-fabricPermissions = "0.3.1"
-iris-fabric = "1.8.0-beta.3+1.21-fabric"
-iris-forge = "1.8.0-beta.3+1.21-neoforge"
-jei = "19.8.2.99"
-modmenu = "11.0.0-rc.4"
+fabricPermissions = "0.3.3"
+iris-fabric = "1.9.1+1.21.7-fabric"
+iris-forge = "1.9.1+1.21.7-neoforge"
+jei = "26.0.0.1"
+modmenu = "16.0.0-rc.1"
 moreRed = "6.0.0.3"
-rei = "16.0.729"
-sodium-fabric = "mc1.21-0.6.0-beta.1-fabric"
-sodium-forge = "mc1.21-0.6.0-beta.1-neoforge"
+rei = "18.0.800"
+sodium-fabric = "mc1.21.6-0.6.13-fabric"
+sodium-forge = "mc1.21.6-0.6.13-neoforge"
 mixinExtra = "0.3.5"
 create-forge = "6.0.0-6"
 create-fabric = "0.5.1-f-build.1467+mc1.20.1"
@@ -58,24 +57,24 @@ junitPlatform = "1.11.4"
 jmh = "1.37"
 
 # Build tools
-cctJavadoc = "1.8.3"
-checkstyle = "10.21.2"
-errorProne-core = "2.36.0"
+cctJavadoc = "1.8.5"
+checkstyle = "10.23.1"
+errorProne-core = "2.38.0"
 errorProne-plugin = "4.1.0"
-fabric-loom = "1.9.2"
+fabric-loom = "1.11.8"
 githubRelease = "2.5.2"
 gradleVersions = "0.50.0"
 ideaExt = "1.1.7"
-illuaminate = "0.1.0-74-gf1551d5"
+illuaminate = "0.1.0-83-g1131f68"
 lwjgl = "3.3.3"
 minotaur = "2.8.7"
-modDevGradle = "2.0.74"
-nullAway = "0.12.3"
+modDevGradle = "2.0.113"
+nullAway = "0.12.7"
 shadow = "8.3.1"
-spotless = "6.23.3"
+spotless = "7.0.2"
 taskTree = "2.1.1"
-teavm = "0.11.0-SQUID.1"
-vanillaExtract = "0.2.0"
+teavm = "0.13.0-SQUID.1"
+vanillaExtract = "0.3.0"
 versionCatalogUpdate = "0.8.1"
 
 [libraries]
@@ -87,7 +86,7 @@ checkerFramework = { module = "org.checkerframework:checker-qual", version.ref =
 cobalt = { module = "cc.tweaked:cobalt", version.ref = "cobalt" }
 commonsCli = { module = "commons-cli:commons-cli", version.ref = "commonsCli" }
 fastutil = { module = "it.unimi.dsi:fastutil", version.ref = "fastutil" }
-neoForgeSpi = { module = "net.neoforged:neoforgespi", version.ref = "neoForgeSpi" }
+neoMergeTool = { module = "net.neoforged:mergetool", version.ref = "neoMergeTool" }
 guava = { module = "com.google.guava:guava", version.ref = "guava" }
 jetbrainsAnnotations = { module = "org.jetbrains:annotations", version.ref = "jetbrainsAnnotations" }
 jspecify = { module = "org.jspecify:jspecify", version.ref = "jspecify" }
@@ -106,16 +105,15 @@ slf4j = { module = "org.slf4j:slf4j-api", version.ref = "slf4j" }
 # Minecraft mods
 create-fabric = { module = "com.simibubi.create:create-fabric-1.20.1", version.ref = "create-fabric" }
 create-forge = { module = "com.simibubi.create:create-1.21.1", version.ref = "create-forge" }
-emi = { module = "dev.emi:emi-xplat-mojmap", version.ref = "emi" }
 fabric-api = { module = "net.fabricmc.fabric-api:fabric-api", version.ref = "fabric-api" }
 fabric-junit = { module = "net.fabricmc:fabric-loader-junit", version.ref = "fabric-loader" }
 fabric-loader = { module = "net.fabricmc:fabric-loader", version.ref = "fabric-loader" }
 fabricPermissions = { module = "me.lucko:fabric-permissions-api", version.ref = "fabricPermissions" }
 iris-fabric = { module = "maven.modrinth:iris", version.ref = "iris-fabric" }
 iris-forge = { module = "maven.modrinth:iris", version.ref = "iris-forge" }
-jei-api = { module = "mezz.jei:jei-1.21-common-api", version.ref = "jei" }
-jei-fabric = { module = "mezz.jei:jei-1.21-fabric", version.ref = "jei" }
-jei-forge = { module = "mezz.jei:jei-1.21-neoforge", version.ref = "jei" }
+jei-api = { module = "mezz.jei:jei-1.21.10-common-api", version.ref = "jei" }
+jei-fabric = { module = "mezz.jei:jei-1.21.10-fabric", version.ref = "jei" }
+jei-forge = { module = "mezz.jei:jei-1.21.10-neoforge", version.ref = "jei" }
 mixin = { module = "org.spongepowered:mixin", version.ref = "mixin" }
 mixinExtra = { module = "io.github.llamalad7:mixinextras-common", version.ref = "mixinExtra" }
 modmenu = { module = "com.terraformersmc:modmenu", version.ref = "modmenu" }
@@ -188,7 +186,7 @@ externalMods-common = ["iris-forge", "jei-api", "nightConfig-core", "nightConfig
 externalMods-forge-compile = ["moreRed", "iris-forge", "jei-api"]
 externalMods-forge-runtime = ["jei-forge"]
 externalMods-fabric-compile = ["fabricPermissions", "iris-fabric", "jei-api", "rei-api", "rei-builtin"]
-externalMods-fabric-runtime = ["jei-fabric", "modmenu"]
+externalMods-fabric-runtime = []
 
 # Testing
 test = ["junit-jupiter-api", "junit-jupiter-params", "hamcrest", "jqwik-api"]

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.12-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.14.3-bin.zip
 networkTimeout=10000
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME

gradlew

@@ -114,7 +114,7 @@ case "$( uname )" in                #(
   NONSTOP* )        nonstop=true ;;
 esac
 
-CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+CLASSPATH="\\\"\\\""
 
 
 # Determine the Java command to use to start the JVM.
@@ -205,7 +205,7 @@ fi
 DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
 
 # Collect all arguments for the java command:
-#   * DEFAULT_JVM_OPTS, JAVA_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
 #     and any embedded shellness will be escaped.
 #   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
 #     treated as '${Hostname}' itself on the command line.
@@ -213,7 +213,7 @@ DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
 set -- \
         "-Dorg.gradle.appname=$APP_BASE_NAME" \
         -classpath "$CLASSPATH" \
-        org.gradle.wrapper.GradleWrapperMain \
+        -jar "$APP_HOME/gradle/wrapper/gradle-wrapper.jar" \
         "$@"
 
 # Stop when "xargs" is not available.

gradlew.bat

@@ -70,11 +70,11 @@ goto fail
 :execute
 @rem Setup the command line
 
-set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+set CLASSPATH=
 
 
 @rem Execute Gradle
-"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" -jar "%APP_HOME%\gradle\wrapper\gradle-wrapper.jar" %*
 
 :end
 @rem End local scope for the variables with windows NT shell

package.json

@@ -12,11 +12,11 @@
     "tslib": "^2.0.3"
   },
   "devDependencies": {
-    "@rollup/plugin-node-resolve": "^15.2.1",
+    "@rollup/plugin-node-resolve": "^16.0.0",
     "@rollup/plugin-typescript": "^12.0.0",
     "@rollup/plugin-url": "^8.0.1",
     "@swc/core": "^1.3.92",
-    "@types/node": "^22.0.0",
+    "@types/node": "^24.0.0",
     "lightningcss": "^1.22.0",
     "preact-render-to-string": "^6.2.1",
     "rehype": "^13.0.0",

projects/common-api/src/client/java/dan200/computercraft/api/client/ModelLocation.java

@@ -1,84 +0,0 @@
-// SPDX-FileCopyrightText: 2024 The CC: Tweaked Developers
-//
-// SPDX-License-Identifier: MPL-2.0
-
-package dan200.computercraft.api.client;
-
-import dan200.computercraft.api.client.turtle.TurtleUpgradeModeller;
-import dan200.computercraft.impl.client.ClientPlatformHelper;
-import net.minecraft.client.resources.model.BakedModel;
-import net.minecraft.client.resources.model.ModelManager;
-import net.minecraft.client.resources.model.ModelResourceLocation;
-import net.minecraft.resources.ResourceLocation;
-import org.jspecify.annotations.Nullable;
-
-import java.util.stream.Stream;
-
-/**
- * The location of a model to load. This may either be:
- *
- * <ul>
- *     <li>A {@link ModelResourceLocation}, referencing an already baked model (such as {@code minecraft:dirt#inventory}).</li>
- *     <li>
- *         A {@link ResourceLocation}, referencing a path to a model resource (such as {@code minecraft:item/dirt}.
- *         These models will be baked and stored in the {@link ModelManager} in a loader-specific way.
- *     </li>
- * </ul>
- */
-public final class ModelLocation {
-    /**
-     * The location of the model.
-     * <p>
-     * When {@link #resourceLocation} is null, this is the location of the model to load. When {@link #resourceLocation}
-     * is non-null, this is the "standalone" variant of the model resource — this is used by NeoForge's implementation
-     * of {@link ClientPlatformHelper#getModel(ModelManager, ModelResourceLocation, ResourceLocation)} to fetch the
-     * model from the model manger. It is not used on Fabric.
-     */
-    private final ModelResourceLocation modelLocation;
-    private final @Nullable ResourceLocation resourceLocation;
-
-    private ModelLocation(ModelResourceLocation modelLocation, @Nullable ResourceLocation resourceLocation) {
-        this.modelLocation = modelLocation;
-        this.resourceLocation = resourceLocation;
-    }
-
-    /**
-     * Create a {@link ModelLocation} from model in the model manager.
-     *
-     * @param location The name of the model to load.
-     * @return The new {@link ModelLocation} instance.
-     */
-    public static ModelLocation ofModel(ModelResourceLocation location) {
-        return new ModelLocation(location, null);
-    }
-
-    /**
-     * Create a {@link ModelLocation} from a resource.
-     *
-     * @param location The location of the model resource, such as {@code minecraft:item/dirt}.
-     * @return The new {@link ModelLocation} instance.
-     */
-    public static ModelLocation ofResource(ResourceLocation location) {
-        return new ModelLocation(new ModelResourceLocation(location, "standalone"), location);
-    }
-
-    /**
-     * Get this model from the provided model manager.
-     *
-     * @param manager The model manger.
-     * @return This model, or the missing model if it could not be found.
-     */
-    public BakedModel getModel(ModelManager manager) {
-        return ClientPlatformHelper.get().getModel(manager, modelLocation, resourceLocation);
-    }
-
-    /**
-     * Get the models this model location depends on.
-     *
-     * @return A list of models that this model location depends on.
-     * @see TurtleUpgradeModeller#getDependencies()
-     */
-    public Stream<ResourceLocation> getDependencies() {
-        return resourceLocation == null ? Stream.empty() : Stream.of(resourceLocation);
-    }
-}

projects/common-api/src/client/java/dan200/computercraft/api/client/StandaloneModel.java

@@ -0,0 +1,181 @@
+// SPDX-FileCopyrightText: 2025 The CC: Tweaked Developers
+//
+// SPDX-License-Identifier: MPL-2.0
+
+package dan200.computercraft.api.client;
+
+import com.google.common.base.Suppliers;
+import com.mojang.blaze3d.vertex.PoseStack;
+import com.mojang.blaze3d.vertex.SheetedDecalTextureGenerator;
+import com.mojang.blaze3d.vertex.VertexConsumer;
+import dan200.computercraft.api.client.turtle.TurtleUpgradeModel;
+import net.minecraft.client.multiplayer.ClientLevel;
+import net.minecraft.client.renderer.RenderType;
+import net.minecraft.client.renderer.Sheets;
+import net.minecraft.client.renderer.SubmitNodeCollector;
+import net.minecraft.client.renderer.block.model.BakedQuad;
+import net.minecraft.client.renderer.feature.ModelFeatureRenderer;
+import net.minecraft.client.renderer.item.BlockModelWrapper;
+import net.minecraft.client.renderer.item.ItemModel;
+import net.minecraft.client.renderer.item.ItemModelResolver;
+import net.minecraft.client.renderer.item.ItemStackRenderState;
+import net.minecraft.client.renderer.texture.TextureAtlasSprite;
+import net.minecraft.client.resources.model.BlockModelRotation;
+import net.minecraft.client.resources.model.ModelBaker;
+import net.minecraft.client.resources.model.ModelBakery;
+import net.minecraft.client.resources.model.ResolvedModel;
+import net.minecraft.resources.ResourceLocation;
+import net.minecraft.util.ARGB;
+import net.minecraft.world.entity.ItemOwner;
+import net.minecraft.world.item.ItemDisplayContext;
+import net.minecraft.world.item.ItemStack;
+import org.joml.Vector3f;
+import org.jspecify.annotations.Nullable;
+
+import java.util.List;
+import java.util.function.Supplier;
+
+/**
+ * A standalone model.
+ * <p>
+ * This is very similar to vanilla's {@link BlockModelWrapper}, but suitable for use in both {@link ItemModel}s and
+ * block models. This is primarily intended for use with {@link TurtleUpgradeModel}s.
+ */
+public final class StandaloneModel {
+    private final List<BakedQuad> quads;
+    private final boolean useBlockLight;
+    private final TextureAtlasSprite particleIcon;
+    private final RenderType renderType;
+    private final Supplier<Vector3f[]> extents;
+
+    /**
+     * Construct a new {@link StandaloneModel}.
+     *
+     * @param quads          The list of quads which form this model.
+     * @param usesBlockLight Whether this uses block lighting. See {@link ItemStackRenderState.LayerRenderState#setUsesBlockLight(boolean)}.
+     * @param particleIcon   The sprite for the model's particles. See {@link ItemStackRenderState.LayerRenderState#setParticleIcon(TextureAtlasSprite)}.
+     * @param renderType     The render type for this model.
+     */
+    public StandaloneModel(List<BakedQuad> quads, boolean usesBlockLight, TextureAtlasSprite particleIcon, RenderType renderType) {
+        this.quads = quads;
+        this.useBlockLight = usesBlockLight;
+        this.particleIcon = particleIcon;
+        this.renderType = renderType;
+        this.extents = Suppliers.memoize(() -> BlockModelWrapper.computeExtents(quads));
+    }
+
+    /**
+     * Load a model from a {@link ModelBaker} and bake it.
+     *
+     * @param model The model id to load.
+     * @param baker The model baker.
+     * @return The baked {@link StandaloneModel}.
+     */
+    public static StandaloneModel of(ResourceLocation model, ModelBaker baker) {
+        return of(baker.getModel(model), baker);
+    }
+
+    /**
+     * Bake a {@link ResolvedModel} into a {@link StandaloneModel}.
+     *
+     * @param model The resolved model.
+     * @param baker The model baker.
+     * @return The baked {@link StandaloneModel}.
+     */
+    public static StandaloneModel of(ResolvedModel model, ModelBaker baker) {
+        return baker.compute(new CacheKey(model));
+    }
+
+    private record CacheKey(ResolvedModel model) implements ModelBaker.SharedOperationKey<StandaloneModel> {
+        @Override
+        public StandaloneModel compute(ModelBaker baker) {
+            return ofUncached(model(), baker);
+        }
+
+        @Override
+        public boolean equals(Object other) {
+            return other instanceof CacheKey(var otherModel) && model() == otherModel;
+        }
+
+        @Override
+        public int hashCode() {
+            return System.identityHashCode(model());
+        }
+    }
+
+    private static StandaloneModel ofUncached(ResolvedModel model, ModelBaker baker) {
+        var slots = model.getTopTextureSlots();
+        return new StandaloneModel(
+            model.bakeTopGeometry(slots, baker, BlockModelRotation.X0_Y0).getAll(),
+            model.getTopGuiLight().lightLikeBlock(),
+            model.resolveParticleSprite(slots, baker),
+            Sheets.translucentItemSheet()
+        );
+    }
+
+    /**
+     * Set up an {@link ItemStackRenderState.LayerRenderState} to render this model.
+     *
+     * @param layer The layer to set up.
+     * @see ItemModel#update(ItemStackRenderState, ItemStack, ItemModelResolver, ItemDisplayContext, ClientLevel, ItemOwner, int)
+     */
+    public void setupItemLayer(ItemStackRenderState.LayerRenderState layer) {
+        layer.setExtents(extents);
+        layer.setRenderType(renderType);
+        layer.setUsesBlockLight(useBlockLight);
+        layer.setParticleIcon(particleIcon);
+        layer.prepareQuadList().addAll(quads);
+    }
+
+    /**
+     * Render the model directly.
+     *
+     * @param transform The current pose stack transformations.
+     * @param collector The node collector to render to.
+     * @param light     The current light texture coordinate.
+     * @param overlay   The current overlay texture coordinate.
+     */
+    public void submit(PoseStack transform, SubmitNodeCollector collector, int light, int overlay) {
+        submit(transform, collector, light, overlay, null, null);
+    }
+
+    /**
+     * Render the model directly.
+     *
+     * @param transform        The current pose stack transformations.
+     * @param collector        The node collector to render to.
+     * @param light            The current light texture coordinate.
+     * @param overlay          The current overlay texture coordinate.
+     * @param tints            The tints for this model.
+     * @param crumblingOverlay The current breaking progress.
+     */
+    public void submit(PoseStack transform, SubmitNodeCollector collector, int light, int overlay, int @Nullable [] tints, ModelFeatureRenderer.@Nullable CrumblingOverlay crumblingOverlay) {
+        collector.submitCustomGeometry(transform, renderType, (pose, buffer) -> render(pose, buffer, tints, light, overlay));
+
+        if (crumblingOverlay != null && renderType.affectsCrumbling()) {
+            // FIXME: We need a custom hook here, which renders to crumblingBufferSource. Currently the DESTROY_TYPES
+            //  buffer gets flushed before the main model gets rendered.
+            collector.submitCustomGeometry(transform, ModelBakery.DESTROY_TYPES.get(crumblingOverlay.progress()), (pose, buffer) ->
+                render(pose, new SheetedDecalTextureGenerator(buffer, crumblingOverlay.cameraPose(), 1.0f), null, light, overlay)
+            );
+        }
+    }
+
+    private void render(PoseStack.Pose pose, VertexConsumer buffer, int @Nullable [] tints, int light, int overlay) {
+        for (var quad : quads) {
+            float r, g, b, a;
+            var idx = quad.tintIndex();
+            if (tints != null && idx >= 0 && idx < tints.length) {
+                var tint = tints[idx];
+                r = ARGB.red(tint) / 255.0f;
+                g = ARGB.green(tint) / 255.0f;
+                b = ARGB.blue(tint) / 255.0f;
+                a = ARGB.alpha(tint) / 255.0f;
+            } else {
+                r = g = b = a = 1.0f;
+            }
+
+            buffer.putBulkData(pose, quad, r, g, b, a, light, overlay);
+        }
+    }
+}

projects/common-api/src/client/java/dan200/computercraft/api/client/TransformedModel.java

@@ -1,66 +0,0 @@
-// SPDX-FileCopyrightText: 2020 The CC: Tweaked Developers
-//
-// SPDX-License-Identifier: MPL-2.0
-
-
-package dan200.computercraft.api.client;
-
-import com.mojang.math.Transformation;
-import dan200.computercraft.impl.client.ClientPlatformHelper;
-import net.minecraft.client.Minecraft;
-import net.minecraft.client.resources.model.BakedModel;
-import net.minecraft.client.resources.model.ModelResourceLocation;
-import net.minecraft.resources.ResourceLocation;
-import net.minecraft.world.item.ItemStack;
-
-/**
- * A model to render, combined with a transformation matrix to apply.
- *
- * @param model  The model.
- * @param matrix The transformation matrix.
- */
-public record TransformedModel(BakedModel model, Transformation matrix) {
-    public TransformedModel(BakedModel model) {
-        this(model, Transformation.identity());
-    }
-
-    /**
-     * Look up a model in the model bakery and construct a {@link TransformedModel} with no transformation.
-     *
-     * @param location The location of the model to load.
-     * @return The new {@link TransformedModel} instance.
-     */
-    public static TransformedModel of(ModelLocation location) {
-        var modelManager = Minecraft.getInstance().getModelManager();
-        return new TransformedModel(location.getModel(modelManager));
-    }
-
-    /**
-     * Look up a model in the model bakery and construct a {@link TransformedModel} with no transformation.
-     *
-     * @param location The location of the model to load.
-     * @return The new {@link TransformedModel} instance.
-     * @see ModelLocation#ofModel(ModelResourceLocation)
-     */
-    public static TransformedModel of(ModelResourceLocation location) {
-        var modelManager = Minecraft.getInstance().getModelManager();
-        return new TransformedModel(modelManager.getModel(location));
-    }
-
-    /**
-     * Look up a model in the model bakery and construct a {@link TransformedModel} with no transformation.
-     *
-     * @param location The location of the model to load.
-     * @return The new {@link TransformedModel} instance.
-     * @see ModelLocation#ofResource(ResourceLocation)
-     */
-    public static TransformedModel of(ResourceLocation location) {
-        var modelManager = Minecraft.getInstance().getModelManager();
-        return new TransformedModel(ClientPlatformHelper.get().getModel(modelManager, location));
-    }
-
-    public static TransformedModel of(ItemStack item, Transformation transform) {
-        var model = Minecraft.getInstance().getItemRenderer().getItemModelShaper().getItemModel(item);
-        return new TransformedModel(model, transform);
-    }
-}

projects/common-api/src/client/java/dan200/computercraft/api/client/turtle/BasicUpgradeModel.java

@@ -0,0 +1,87 @@
+// SPDX-FileCopyrightText: 2025 The CC: Tweaked Developers
+//
+// SPDX-License-Identifier: MPL-2.0
+
+package dan200.computercraft.api.client.turtle;
+
+import com.mojang.serialization.MapCodec;
+import com.mojang.serialization.codecs.RecordCodecBuilder;
+import dan200.computercraft.api.ComputerCraftAPI;
+import dan200.computercraft.api.client.StandaloneModel;
+import dan200.computercraft.api.turtle.ITurtleUpgrade;
+import dan200.computercraft.api.turtle.TurtleSide;
+import dan200.computercraft.api.upgrades.UpgradeData;
+import net.minecraft.client.renderer.block.model.ItemTransform;
+import net.minecraft.client.renderer.item.BlockModelWrapper;
+import net.minecraft.client.renderer.item.ItemModelResolver;
+import net.minecraft.client.renderer.item.ItemStackRenderState;
+import net.minecraft.client.resources.model.ModelBaker;
+import net.minecraft.resources.ResourceLocation;
+
+/**
+ * A {@link TurtleUpgradeModel} that renders a basic model.
+ * <p>
+ * This is the {@link TurtleUpgradeModel} equivalent of {@link BlockModelWrapper}.
+ */
+public final class BasicUpgradeModel implements TurtleUpgradeModel {
+    public static final ResourceLocation ID = ResourceLocation.fromNamespaceAndPath(ComputerCraftAPI.MOD_ID, "sided");
+    public static final MapCodec<? extends TurtleUpgradeModel.Unbaked> CODEC = RecordCodecBuilder.<Unbaked>mapCodec(instance -> instance.group(
+        ResourceLocation.CODEC.fieldOf("left").forGetter(Unbaked::left),
+        ResourceLocation.CODEC.fieldOf("right").forGetter(Unbaked::right)
+    ).apply(instance, Unbaked::new));
+
+    private final StandaloneModel left;
+    private final StandaloneModel right;
+
+    private BasicUpgradeModel(StandaloneModel left, StandaloneModel right) {
+        this.left = left;
+        this.right = right;
+    }
+
+    /**
+     * Create an unbaked {@link BasicUpgradeModel}.
+     *
+     * @param left  The model when equipped on the left.
+     * @param right The model when equipped on the right.
+     * @return The unbaked turtle upgrade model.
+     */
+    public static TurtleUpgradeModel.Unbaked unbaked(ResourceLocation left, ResourceLocation right) {
+        return new Unbaked(left, right);
+    }
+
+    private StandaloneModel getModel(TurtleSide side) {
+        return switch (side) {
+            case LEFT -> left;
+            case RIGHT -> right;
+        };
+    }
+
+    @Override
+    public void renderForItem(UpgradeData<ITurtleUpgrade> upgrade, TurtleSide side, ItemStackRenderState renderer, ItemModelResolver resolver, ItemTransform transform, int seed) {
+        renderer.appendModelIdentityElement(this);
+        renderer.appendModelIdentityElement(side);
+        renderer.appendModelIdentityElement(transform);
+
+        var layer = renderer.newLayer();
+        layer.setTransform(transform);
+        getModel(side).setupItemLayer(layer);
+    }
+
+    private record Unbaked(ResourceLocation left, ResourceLocation right) implements TurtleUpgradeModel.Unbaked {
+        @Override
+        public MapCodec<? extends TurtleUpgradeModel.Unbaked> type() {
+            return CODEC;
+        }
+
+        @Override
+        public TurtleUpgradeModel bake(ModelBaker baker) {
+            return new BasicUpgradeModel(StandaloneModel.of(left(), baker), StandaloneModel.of(right(), baker));
+        }
+
+        @Override
+        public void resolveDependencies(Resolver resolver) {
+            resolver.markDependency(left());
+            resolver.markDependency(right());
+        }
+    }
+}

projects/common-api/src/client/java/dan200/computercraft/api/client/turtle/ItemUpgradeModel.java

@@ -0,0 +1,131 @@
+// SPDX-FileCopyrightText: 2025 The CC: Tweaked Developers
+//
+// SPDX-License-Identifier: MPL-2.0
+
+package dan200.computercraft.api.client.turtle;
+
+import com.mojang.blaze3d.vertex.PoseStack;
+import com.mojang.math.Axis;
+import com.mojang.math.Transformation;
+import com.mojang.serialization.MapCodec;
+import dan200.computercraft.api.ComputerCraftAPI;
+import dan200.computercraft.api.turtle.ITurtleUpgrade;
+import dan200.computercraft.api.turtle.TurtleSide;
+import dan200.computercraft.api.upgrades.UpgradeData;
+import net.minecraft.client.renderer.SubmitNodeCollector;
+import net.minecraft.client.renderer.block.model.ItemTransform;
+import net.minecraft.client.renderer.item.ItemModelResolver;
+import net.minecraft.client.renderer.item.ItemStackRenderState;
+import net.minecraft.client.renderer.item.TrackingItemStackRenderState;
+import net.minecraft.client.renderer.special.SpecialModelRenderer;
+import net.minecraft.client.resources.model.ModelBaker;
+import net.minecraft.core.component.DataComponentPatch;
+import net.minecraft.resources.ResourceLocation;
+import net.minecraft.world.item.ItemDisplayContext;
+import net.minecraft.world.item.ItemStack;
+import org.joml.Matrix4f;
+import org.joml.Vector3f;
+import org.jspecify.annotations.Nullable;
+
+import java.util.Set;
+
+/**
+ * A sic {@link TurtleUpgradeModel} that renders the upgrade's {@linkplain ITurtleUpgrade#getUpgradeItem(DataComponentPatch)
+ * upgrade item}.
+ * <p>
+ * This uses appropriate transformations for "flat" items, namely those extending the {@literal minecraft:item/generated}
+ * model type. It will not appear correct for 3D models with additional depth, such as blocks.
+ */
+public final class ItemUpgradeModel implements TurtleUpgradeModel {
+    private static final TurtleUpgradeModel.Unbaked UNBAKED = new Unbaked();
+    private static final TurtleUpgradeModel INSTANCE = new ItemUpgradeModel();
+
+    public static final ResourceLocation ID = ResourceLocation.fromNamespaceAndPath(ComputerCraftAPI.MOD_ID, "item");
+    public static final MapCodec<TurtleUpgradeModel.Unbaked> CODEC = MapCodec.unit(UNBAKED);
+
+    private static final TransformedRenderer LEFT = computeRenderer(TurtleSide.LEFT);
+    private static final TransformedRenderer RIGHT = computeRenderer(TurtleSide.RIGHT);
+
+    private ItemUpgradeModel() {
+    }
+
+    /**
+     * Get the unbaked {@link ItemUpgradeModel}.
+     *
+     * @return The unbaked item upgrade model.
+     */
+    public static TurtleUpgradeModel.Unbaked unbaked() {
+        return UNBAKED;
+    }
+
+    @Override
+    public void renderForItem(UpgradeData<ITurtleUpgrade> upgrade, TurtleSide side, ItemStackRenderState renderer, ItemModelResolver resolver, ItemTransform transform, int seed) {
+        renderer.appendModelIdentityElement(this);
+
+        var childState = new TrackingItemStackRenderState();
+        resolver.updateForTopItem(childState, upgrade.getUpgradeItem(), ItemDisplayContext.NONE, null, null, seed);
+        if (!childState.isEmpty()) {
+            renderer.appendModelIdentityElement(childState.getModelIdentity());
+            renderer.appendModelIdentityElement(transform);
+
+            var layer = renderer.newLayer();
+            layer.setTransform(transform);
+            layer.setupSpecialModel(getRenderer(side), childState);
+        }
+    }
+
+    private static final class Unbaked implements TurtleUpgradeModel.Unbaked {
+        @Override
+        public MapCodec<? extends TurtleUpgradeModel.Unbaked> type() {
+            return CODEC;
+        }
+
+        @Override
+        public TurtleUpgradeModel bake(ModelBaker baker) {
+            return INSTANCE;
+        }
+
+        @Override
+        public void resolveDependencies(Resolver resolver) {
+        }
+    }
+
+    private static TransformedRenderer computeRenderer(TurtleSide side) {
+        var pose = new Matrix4f();
+        pose.translate(0.5f, 0.5f, 0.5f);
+        pose.rotate(Axis.YN.rotationDegrees(90f));
+        pose.rotate(Axis.ZP.rotationDegrees(90f));
+        pose.translate(0.0f, 0.0f, side == TurtleSide.RIGHT ? -0.4065f : 0.4065f);
+        return new TransformedRenderer(new Transformation(pose));
+    }
+
+    private static TransformedRenderer getRenderer(TurtleSide side) {
+        return switch (side) {
+            case LEFT -> LEFT;
+            case RIGHT -> RIGHT;
+        };
+    }
+
+    private record TransformedRenderer(Transformation transform) implements SpecialModelRenderer<ItemStackRenderState> {
+        @Override
+        public void submit(
+            @Nullable ItemStackRenderState state, ItemDisplayContext context, PoseStack poseStack, SubmitNodeCollector sink,
+            int light, int overlay, boolean foil, int outlineColour
+        ) {
+            if (state == null) return;
+            poseStack.pushPose();
+            poseStack.mulPose(transform.getMatrix());
+            state.submit(poseStack, sink, light, overlay, outlineColour);
+            poseStack.popPose();
+        }
+
+        @Override
+        public void getExtents(Set<Vector3f> set) {
+        }
+
+        @Override
+        public @Nullable ItemStackRenderState extractArgument(ItemStack itemStack) {
+            return null;
+        }
+    }
+}

projects/common-api/src/client/java/dan200/computercraft/api/client/turtle/RegisterTurtleUpgradeModel.java

@@ -0,0 +1,25 @@
+// SPDX-FileCopyrightText: 2023 The CC: Tweaked Developers
+//
+// SPDX-License-Identifier: MPL-2.0
+
+package dan200.computercraft.api.client.turtle;
+
+import com.mojang.serialization.MapCodec;
+import net.minecraft.resources.ResourceLocation;
+
+/**
+ * A functional interface to register a {@link TurtleUpgradeModel}.
+ * <p>
+ * This interface is largely intended to be used from multi-loader code, to allow sharing registration code between
+ * multiple loaders.
+ */
+@FunctionalInterface
+public interface RegisterTurtleUpgradeModel {
+    /**
+     * Register a {@link TurtleUpgradeModel}.
+     *
+     * @param id    The id used for this type of upgrade model.
+     * @param model The codec used to read/decode an upgrade model.
+     */
+    void register(ResourceLocation id, MapCodec<? extends TurtleUpgradeModel.Unbaked> model);
+}

projects/common-api/src/client/java/dan200/computercraft/api/client/turtle/RegisterTurtleUpgradeModeller.java

@@ -1,26 +0,0 @@
-// SPDX-FileCopyrightText: 2023 The CC: Tweaked Developers
-//
-// SPDX-License-Identifier: MPL-2.0
-
-package dan200.computercraft.api.client.turtle;
-
-import dan200.computercraft.api.turtle.ITurtleUpgrade;
-import dan200.computercraft.api.upgrades.UpgradeType;
-
-/**
- * A functional interface to register a {@link TurtleUpgradeModeller} for a class of turtle upgrades.
- * <p>
- * This interface is largely intended to be used from multi-loader code, to allow sharing registration code between
- * multiple loaders.
- */
-@FunctionalInterface
-public interface RegisterTurtleUpgradeModeller {
-    /**
-     * Register a {@link TurtleUpgradeModeller}.
-     *
-     * @param type     The turtle upgrade type.
-     * @param modeller The upgrade modeller.
-     * @param <T>      The type of the turtle upgrade.
-     */
-    <T extends ITurtleUpgrade> void register(UpgradeType<T> type, TurtleUpgradeModeller<T> modeller);
-}

projects/common-api/src/client/java/dan200/computercraft/api/client/turtle/SelectUpgradeModel.java

@@ -0,0 +1,201 @@
+// SPDX-FileCopyrightText: 2025 The CC: Tweaked Developers
+//
+// SPDX-License-Identifier: MPL-2.0
+
+package dan200.computercraft.api.client.turtle;
+
+import com.google.common.collect.HashMultiset;
+import com.google.common.collect.Multiset;
+import com.mojang.datafixers.util.Pair;
+import com.mojang.serialization.Codec;
+import com.mojang.serialization.DataResult;
+import com.mojang.serialization.MapCodec;
+import com.mojang.serialization.codecs.RecordCodecBuilder;
+import dan200.computercraft.api.ComputerCraftAPI;
+import dan200.computercraft.api.turtle.ITurtleUpgrade;
+import dan200.computercraft.api.turtle.TurtleSide;
+import dan200.computercraft.api.upgrades.UpgradeData;
+import it.unimi.dsi.fastutil.objects.Object2ObjectOpenHashMap;
+import net.minecraft.Util;
+import net.minecraft.client.renderer.block.model.ItemTransform;
+import net.minecraft.client.renderer.item.ItemModelResolver;
+import net.minecraft.client.renderer.item.ItemStackRenderState;
+import net.minecraft.client.renderer.item.SelectItemModel;
+import net.minecraft.client.resources.model.MissingBlockModel;
+import net.minecraft.client.resources.model.ModelBaker;
+import net.minecraft.core.component.DataComponentType;
+import net.minecraft.resources.ResourceLocation;
+import org.jspecify.annotations.Nullable;
+
+import java.util.*;
+import java.util.stream.Collectors;
+
+/**
+ * A {@link TurtleUpgradeModel} which selects between different models based on the value of a component in
+ * {@linkplain UpgradeData#data() the upgrade's data}.
+ * <p>
+ * This is the {@link TurtleUpgradeModel} equivalent of {@link SelectItemModel}.
+ *
+ * @param <T> The type of value to switch on.
+ */
+public final class SelectUpgradeModel<T> implements TurtleUpgradeModel {
+    public static final ResourceLocation ID = ResourceLocation.fromNamespaceAndPath(ComputerCraftAPI.MOD_ID, "select");
+    public static final MapCodec<? extends TurtleUpgradeModel.Unbaked> CODEC = RecordCodecBuilder.<Unbaked<?>>mapCodec(instance -> instance.group(
+        Cases.CODEC.forGetter(Unbaked::cases),
+        TurtleUpgradeModel.CODEC.optionalFieldOf("fallback").forGetter(Unbaked::fallback)
+    ).apply(instance, Unbaked::new));
+
+    private final DataComponentType<T> component;
+    private final Map<T, TurtleUpgradeModel> cases;
+    private final TurtleUpgradeModel fallback;
+
+    private SelectUpgradeModel(DataComponentType<T> component, Map<T, TurtleUpgradeModel> cases, TurtleUpgradeModel fallback) {
+        this.component = component;
+        this.cases = cases;
+        this.fallback = fallback;
+    }
+
+    private TurtleUpgradeModel getModel(UpgradeData<ITurtleUpgrade> upgrade) {
+        var value = upgrade.get(component);
+        if (value == null) return fallback;
+
+        var model = cases.get(value);
+        return model != null ? model : fallback;
+    }
+
+    @Override
+    public void renderForItem(UpgradeData<ITurtleUpgrade> upgrade, TurtleSide side, ItemStackRenderState renderer, ItemModelResolver resolver, ItemTransform transform, int seed) {
+        getModel(upgrade).renderForItem(upgrade, side, renderer, resolver, transform, seed);
+    }
+
+    private record Unbaked<T>(
+        Cases<T> cases,
+        Optional<TurtleUpgradeModel.Unbaked> fallback
+    ) implements TurtleUpgradeModel.Unbaked {
+        private static final TurtleUpgradeModel.Unbaked MISSING = BasicUpgradeModel.unbaked(MissingBlockModel.LOCATION, MissingBlockModel.LOCATION);
+
+        @Override
+        public MapCodec<? extends TurtleUpgradeModel.Unbaked> type() {
+            return CODEC;
+        }
+
+        @Override
+        public TurtleUpgradeModel bake(ModelBaker baker) {
+            Map<T, TurtleUpgradeModel> cases = new Object2ObjectOpenHashMap<>();
+            for (var condition : cases().cases()) {
+                var model = condition.getSecond().bake(baker);
+                for (var when : condition.getFirst()) cases.put(when, model);
+            }
+
+            return new SelectUpgradeModel<>(cases().component(), cases, fallback().orElse(MISSING).bake(baker));
+        }
+
+        @Override
+        public void resolveDependencies(Resolver resolver) {
+            cases().cases().forEach(x -> x.getSecond().resolveDependencies(resolver));
+            fallback().orElse(MISSING).resolveDependencies(resolver);
+        }
+    }
+
+    private record Cases<T>(DataComponentType<T> component, List<Pair<List<T>, TurtleUpgradeModel.Unbaked>> cases) {
+        private static final MapCodec<Cases<?>> CODEC = DataComponentType.CODEC.dispatchMap("property", Cases::component, Util.memoize(Cases::codec));
+
+        private static <T> MapCodec<Cases<T>> codec(DataComponentType<T> component) {
+            return RecordCodecBuilder.mapCodec(instance -> instance.group(
+                MapCodec.unit(component).forGetter(Cases::component),
+                caseCodec(component.codecOrThrow()).listOf().fieldOf("cases").validate(Cases::validate).forGetter(Cases::cases)
+            ).apply(instance, Cases<T>::new));
+        }
+
+        private static <T> Codec<Pair<List<T>, TurtleUpgradeModel.Unbaked>> caseCodec(Codec<T> codec) {
+            return RecordCodecBuilder.create(instance -> instance.group(
+                codec.listOf().fieldOf("when").forGetter(Pair::getFirst),
+                TurtleUpgradeModel.CODEC.fieldOf("model").forGetter(Pair::getSecond)
+            ).apply(instance, Pair::new));
+        }
+
+        private static <T> DataResult<List<Pair<List<T>, TurtleUpgradeModel.Unbaked>>> validate(List<Pair<List<T>, TurtleUpgradeModel.Unbaked>> cases) {
+            Multiset<T> multiset = HashMultiset.create();
+            for (var condition : cases) multiset.addAll(condition.getFirst());
+
+            if (multiset.isEmpty()) return DataResult.error(() -> "Empty cases");
+            if (multiset.size() != multiset.entrySet().size()) {
+                return DataResult.error(() -> "Duplicate case conditions: " + multiset.entrySet().stream()
+                    .filter(x -> x.getCount() > 1)
+                    .map(x -> Objects.toString(x.getElement()))
+                    .collect(Collectors.joining(", ")));
+            }
+
+            return DataResult.success(cases);
+        }
+    }
+
+    /**
+     * Create a {@link SelectUpgradeModel} that selects a model based on a component.
+     *
+     * @param component The component to select.
+     * @param <T>       The type the component stores.
+     * @return A {@link Builder}.
+     */
+    public static <T> Builder<T> onComponent(DataComponentType<T> component) {
+        return new Builder<>(component);
+    }
+
+    /**
+     * A builder for constructing {@link SelectUpgradeModel}s.
+     *
+     * @param <T> The type of value to switch on.
+     */
+    public static final class Builder<T> {
+        private final DataComponentType<T> component;
+        private final List<Pair<List<T>, TurtleUpgradeModel.Unbaked>> cases = new ArrayList<>();
+        private TurtleUpgradeModel.@Nullable Unbaked fallback;
+
+        private Builder(DataComponentType<T> component) {
+            this.component = component;
+        }
+
+        /**
+         * Add a case to our model.
+         *
+         * @param value The value for this case.
+         * @param model The model to use.
+         * @return {@code this}, for chaining.
+         */
+        public Builder<T> when(T value, TurtleUpgradeModel.Unbaked model) {
+            return when(List.of(value), model);
+        }
+
+        /**
+         * Add a case to our model.
+         *
+         * @param values The value(s) for this case.
+         * @param model  The model to use.
+         * @return {@code this}, for chaining.
+         */
+        public Builder<T> when(List<T> values, TurtleUpgradeModel.Unbaked model) {
+            cases.add(Pair.of(values, model));
+            return this;
+        }
+
+        /**
+         * Add a fallback value, when no previous value matches or the component is not present.
+         *
+         * @param model The fallback model.
+         * @return {@code this}, for chaining.
+         */
+        public Builder<T> fallback(TurtleUpgradeModel.Unbaked model) {
+            this.fallback = model;
+            return this;
+        }
+
+        /**
+         * Convert this builder into an unbaked model.
+         *
+         * @return The unbaked {@link SelectUpgradeModel}.
+         */
+        public TurtleUpgradeModel.Unbaked create() {
+            return new Unbaked<>(new Cases<>(component, cases), Optional.ofNullable(fallback));
+        }
+    }
+}

projects/common-api/src/client/java/dan200/computercraft/api/client/turtle/TurtleUpgradeModel.java

@@ -0,0 +1,93 @@
+// SPDX-FileCopyrightText: 2025 The CC: Tweaked Developers
+//
+// SPDX-License-Identifier: MPL-2.0
+
+package dan200.computercraft.api.client.turtle;
+
+import com.mojang.serialization.Codec;
+import com.mojang.serialization.MapCodec;
+import dan200.computercraft.api.ComputerCraftAPI;
+import dan200.computercraft.api.turtle.ITurtleUpgrade;
+import dan200.computercraft.api.turtle.TurtleSide;
+import dan200.computercraft.api.upgrades.UpgradeData;
+import dan200.computercraft.impl.client.ComputerCraftAPIClientService;
+import net.minecraft.client.multiplayer.ClientLevel;
+import net.minecraft.client.renderer.block.model.ItemTransform;
+import net.minecraft.client.renderer.item.ItemModel;
+import net.minecraft.client.renderer.item.ItemModelResolver;
+import net.minecraft.client.renderer.item.ItemStackRenderState;
+import net.minecraft.client.resources.model.ModelBaker;
+import net.minecraft.client.resources.model.ResolvableModel;
+import net.minecraft.world.entity.ItemOwner;
+import net.minecraft.world.item.ItemDisplayContext;
+import net.minecraft.world.item.ItemStack;
+
+/**
+ * The model for a {@link ITurtleUpgrade}.
+ * <p>
+ * Turtle upgrade models are very similar to vanilla's {@link ItemModel}. Each upgrade's model is defined in JSON, and
+ * loaded from resource packs with other assets.
+ * <p>
+ * In most cases, upgrades can use one of the existing implementations of {@link TurtleUpgradeModel} (e.g.
+ * {@link BasicUpgradeModel} or {@link ItemUpgradeModel}), and do not need to subclass it. However, in the cases where
+ * a custom model is required, one should use
+ * {@code dan200.computercraft.api.client.FabricComputerCraftAPIClient#registerTurtleUpgradeModel} to register a
+ * model on Fabric and {@code dan200.computercraft.api.client.turtle.RegisterTurtleModelEvent} to register one
+ * on Forge.
+ * <p>
+ * See {@link ITurtleUpgrade} for a full example of registering turtle upgrades and their models.
+ *
+ * @see RegisterTurtleUpgradeModel For multi-loader registration support.
+ * @see ItemUpgradeModel A {@code TurtleUpgradeModel} which uses the upgrade's item.
+ * @see BasicUpgradeModel A {@code TurtleUpgradeModel} which renders a simple model.
+ */
+public interface TurtleUpgradeModel {
+    /**
+     * The directory from which turtle upgrade models are loaded. This may be used by data generators.
+     */
+    String SOURCE = ComputerCraftAPI.MOD_ID + "/turtle_upgrade";
+
+    /**
+     * The codec used to read/write {@linkplain TurtleUpgradeModel.Unbaked unbaked upgrade models}.
+     */
+    Codec<TurtleUpgradeModel.Unbaked> CODEC = Codec.lazyInitialized(() -> ComputerCraftAPIClientService.get().getTurtleUpgradeModelCodec());
+
+    /**
+     * Render this upgrade to an {@link ItemStackRenderState}. This is used for rendering the item form of the upgrade.
+     * <p>
+     * Like with {@link ItemModel}, implementations must be careful to call {@link ItemStackRenderState#appendModelIdentityElement}
+     * where appropriate.
+     *
+     * @param upgrade   The upgrade being rendered.
+     * @param side      Which side of the turtle (left or right) the upgrade is equipped on.
+     * @param renderer  The render state to draw to.
+     * @param resolver  The model resolver.
+     * @param transform The root model's transformation.
+     * @param seed      The current model seed.
+     * @see ItemModel#update(ItemStackRenderState, ItemStack, ItemModelResolver, ItemDisplayContext, ClientLevel, ItemOwner, int)
+     */
+    void renderForItem(UpgradeData<ITurtleUpgrade> upgrade, TurtleSide side, ItemStackRenderState renderer, ItemModelResolver resolver, ItemTransform transform, int seed);
+
+    /**
+     * An unbaked turtle model. Much like other unbaked models (e.g. {@link ItemModel.Unbaked}), this should resolve
+     * any dependencies and returned the fully-resolved model.
+     */
+    interface Unbaked extends ResolvableModel {
+        /**
+         * The {@link MapCodec} used to read/write this unbaked model.
+         *
+         * @return The codec used to read/write this model.
+         * @see ItemModel.Unbaked#type()
+         */
+        MapCodec<? extends Unbaked> type();
+
+        /**
+         * Bake this turtle model.
+         *
+         * @param baker The current model baker
+         * @return The baked upgrade model.
+         * @see ItemModel.Unbaked#bake(ItemModel.BakingContext)
+         */
+        TurtleUpgradeModel bake(ModelBaker baker);
+    }
+}

projects/common-api/src/client/java/dan200/computercraft/api/client/turtle/TurtleUpgradeModeller.java

@@ -1,112 +0,0 @@
-// SPDX-FileCopyrightText: 2022 The CC: Tweaked Developers
-//
-// SPDX-License-Identifier: MPL-2.0
-
-package dan200.computercraft.api.client.turtle;
-
-import dan200.computercraft.api.client.ModelLocation;
-import dan200.computercraft.api.client.TransformedModel;
-import dan200.computercraft.api.turtle.ITurtleAccess;
-import dan200.computercraft.api.turtle.ITurtleUpgrade;
-import dan200.computercraft.api.turtle.TurtleSide;
-import net.minecraft.client.resources.model.UnbakedModel;
-import net.minecraft.core.component.DataComponentPatch;
-import net.minecraft.resources.ResourceLocation;
-import org.jspecify.annotations.Nullable;
-
-import java.util.stream.Stream;
-
-/**
- * Provides models for a {@link ITurtleUpgrade}.
- * <p>
- * Use {@code dan200.computercraft.api.client.FabricComputerCraftAPIClient#registerTurtleUpgradeModeller} to register a
- * modeller on Fabric and {@code dan200.computercraft.api.client.turtle.RegisterTurtleModellersEvent} to register one
- * on Forge.
- *
- * <h2>Example</h2>
- * <h3>Fabric</h3>
- * {@snippet class=com.example.examplemod.FabricExampleModClient region=turtle_modellers}
- *
- * <h3>Forge</h3>
- * {@snippet class=com.example.examplemod.FabricExampleModClient region=turtle_modellers}
- *
- * @param <T> The type of turtle upgrade this modeller applies to.
- * @see RegisterTurtleUpgradeModeller For multi-loader registration support.
- */
-public interface TurtleUpgradeModeller<T extends ITurtleUpgrade> {
-    /**
-     * Obtain the model to be used when rendering a turtle peripheral.
-     * <p>
-     * When the current turtle is {@literal null}, this function should be constant for a given upgrade, side and data.
-     *
-     * @param upgrade The upgrade that you're getting the model for.
-     * @param turtle  Access to the turtle that the upgrade resides on. This will be null when getting item models.
-     * @param side    Which side of the turtle (left or right) the upgrade resides on.
-     * @param data    Upgrade data instance for current turtle side.
-     * @return The model that you wish to be used to render your upgrade.
-     */
-    TransformedModel getModel(T upgrade, @Nullable ITurtleAccess turtle, TurtleSide side, DataComponentPatch data);
-
-    /**
-     * Get the models that this turtle modeller depends on.
-     * <p>
-     * Models included in this stream will be loaded and baked alongside item and block models, and so may be referenced
-     * by {@link TransformedModel#of(ResourceLocation)}. You do not need to override this method if you will load models
-     * by other means.
-     *
-     * @return A list of models that this modeller depends on.
-     * @see UnbakedModel#getDependencies()
-     */
-    default Stream<ResourceLocation> getDependencies() {
-        return Stream.of();
-    }
-
-    /**
-     * A basic {@link TurtleUpgradeModeller} which renders using the upgrade's {@linkplain ITurtleUpgrade#getUpgradeItem(DataComponentPatch)}
-     * upgrade item}.
-     * <p>
-     * This uses appropriate transformations for "flat" items, namely those extending the {@literal minecraft:item/generated}
-     * model type. It will not appear correct for 3D models with additional depth, such as blocks.
-     *
-     * @param <T> The type of the turtle upgrade.
-     * @return The constructed modeller.
-     */
-    @SuppressWarnings("unchecked")
-    static <T extends ITurtleUpgrade> TurtleUpgradeModeller<T> flatItem() {
-        return (TurtleUpgradeModeller<T>) TurtleUpgradeModellers.UPGRADE_ITEM;
-    }
-
-    /**
-     * Construct a {@link TurtleUpgradeModeller} which has a single model for the left and right side.
-     *
-     * @param left  The model to use on the left.
-     * @param right The model to use on the right.
-     * @param <T>   The type of the turtle upgrade.
-     * @return The constructed modeller.
-     */
-    static <T extends ITurtleUpgrade> TurtleUpgradeModeller<T> sided(ResourceLocation left, ResourceLocation right) {
-        return sided(ModelLocation.ofResource(left), ModelLocation.ofResource(right));
-    }
-
-    /**
-     * Construct a {@link TurtleUpgradeModeller} which has a single model for the left and right side.
-     *
-     * @param left  The model to use on the left.
-     * @param right The model to use on the right.
-     * @param <T>   The type of the turtle upgrade.
-     * @return The constructed modeller.
-     */
-    static <T extends ITurtleUpgrade> TurtleUpgradeModeller<T> sided(ModelLocation left, ModelLocation right) {
-        return new TurtleUpgradeModeller<>() {
-            @Override
-            public TransformedModel getModel(T upgrade, @Nullable ITurtleAccess turtle, TurtleSide side, DataComponentPatch data) {
-                return TransformedModel.of(side == TurtleSide.LEFT ? left : right);
-            }
-
-            @Override
-            public Stream<ResourceLocation> getDependencies() {
-                return Stream.of(left, right).flatMap(ModelLocation::getDependencies);
-            }
-        };
-    }
-}

projects/common-api/src/client/java/dan200/computercraft/api/client/turtle/TurtleUpgradeModellers.java

@@ -1,45 +0,0 @@
-// SPDX-FileCopyrightText: 2022 The CC: Tweaked Developers
-//
-// SPDX-License-Identifier: MPL-2.0
-
-package dan200.computercraft.api.client.turtle;
-
-import com.mojang.math.Transformation;
-import dan200.computercraft.api.client.TransformedModel;
-import dan200.computercraft.api.turtle.ITurtleAccess;
-import dan200.computercraft.api.turtle.ITurtleUpgrade;
-import dan200.computercraft.api.turtle.TurtleSide;
-import dan200.computercraft.impl.client.ClientPlatformHelper;
-import net.minecraft.client.Minecraft;
-import net.minecraft.core.component.DataComponentPatch;
-import org.joml.Matrix4f;
-import org.jspecify.annotations.Nullable;
-
-final class TurtleUpgradeModellers {
-    private static final Transformation leftTransform = getMatrixFor(-0.4065f);
-    private static final Transformation rightTransform = getMatrixFor(0.4065f);
-
-    private static Transformation getMatrixFor(float offset) {
-        var matrix = new Matrix4f();
-        matrix.set(new float[]{
-            0.0f, 0.0f, -1.0f, 1.0f + offset,
-            1.0f, 0.0f, 0.0f, 0.0f,
-            0.0f, -1.0f, 0.0f, 1.0f,
-            0.0f, 0.0f, 0.0f, 1.0f,
-        });
-        matrix.transpose();
-        return new Transformation(matrix);
-    }
-
-    static final TurtleUpgradeModeller<ITurtleUpgrade> UPGRADE_ITEM = new UpgradeItemModeller();
-
-    private static final class UpgradeItemModeller implements TurtleUpgradeModeller<ITurtleUpgrade> {
-        @Override
-        public TransformedModel getModel(ITurtleUpgrade upgrade, @Nullable ITurtleAccess turtle, TurtleSide side, DataComponentPatch data) {
-            var stack = upgrade.getUpgradeItem(data);
-            var model = Minecraft.getInstance().getItemRenderer().getItemModelShaper().getItemModel(stack);
-            if (stack.hasFoil()) model = ClientPlatformHelper.get().createdFoiledModel(model);
-            return new TransformedModel(model, side == TurtleSide.LEFT ? leftTransform : rightTransform);
-        }
-    }
-}

projects/common-api/src/client/java/dan200/computercraft/impl/client/ClientPlatformHelper.java

@@ -1,70 +0,0 @@
-// SPDX-FileCopyrightText: 2022 The CC: Tweaked Developers
-//
-// SPDX-License-Identifier: MPL-2.0
-
-package dan200.computercraft.impl.client;
-
-import dan200.computercraft.api.client.ModelLocation;
-import dan200.computercraft.impl.Services;
-import net.minecraft.client.renderer.RenderType;
-import net.minecraft.client.resources.model.BakedModel;
-import net.minecraft.client.resources.model.ModelManager;
-import net.minecraft.client.resources.model.ModelResourceLocation;
-import net.minecraft.resources.ResourceLocation;
-import org.jetbrains.annotations.ApiStatus;
-import org.jspecify.annotations.Nullable;
-
-@ApiStatus.Internal
-public interface ClientPlatformHelper {
-    /**
-     * Get a model from a resource.
-     *
-     * @param manager          The model manager.
-     * @param resourceLocation The model resourceLocation.
-     * @return The baked model.
-     * @see ModelLocation
-     */
-    BakedModel getModel(ModelManager manager, ResourceLocation resourceLocation);
-
-    /**
-     * Set a model from a {@link ModelResourceLocation} or {@link ResourceLocation}.
-     * <p>
-     * This is largely equivalent to {@code resourceLocation == null ? manager.getModel(modelLocation) : getModel(manager, resourceLocation)},
-     * but allows pre-computing {@code modelLocation} (if needed).
-     *
-     * @param manager          The model manager.
-     * @param modelLocation    The location of the model to load.
-     * @param resourceLocation The location of the resource, if trying to load from a resource.
-     * @return The baked model.
-     * @see ModelLocation
-     */
-    BakedModel getModel(ModelManager manager, ModelResourceLocation modelLocation, @Nullable ResourceLocation resourceLocation);
-
-    /**
-     * Wrap this model in a version which renders a foil/enchantment glint.
-     *
-     * @param model The model to wrap.
-     * @return The wrapped model.
-     * @see RenderType#glint()
-     */
-    BakedModel createdFoiledModel(BakedModel model);
-
-    static ClientPlatformHelper get() {
-        var instance = Instance.INSTANCE;
-        return instance == null ? Services.raise(ClientPlatformHelper.class, Instance.ERROR) : instance;
-    }
-
-    final class Instance {
-        static final @Nullable ClientPlatformHelper INSTANCE;
-        static final @Nullable Throwable ERROR;
-
-        static {
-            var helper = Services.tryLoad(ClientPlatformHelper.class);
-            INSTANCE = helper.instance();
-            ERROR = helper.error();
-        }
-
-        private Instance() {
-        }
-    }
-}

projects/common-api/src/client/java/dan200/computercraft/impl/client/ComputerCraftAPIClientService.java

@@ -0,0 +1,40 @@
+// SPDX-FileCopyrightText: 2025 The CC: Tweaked Developers
+//
+// SPDX-License-Identifier: MPL-2.0
+
+package dan200.computercraft.impl.client;
+
+import com.mojang.serialization.Codec;
+import dan200.computercraft.api.client.turtle.TurtleUpgradeModel;
+import dan200.computercraft.impl.Services;
+import org.jetbrains.annotations.ApiStatus;
+import org.jspecify.annotations.Nullable;
+
+/**
+ * Bridge between implementation
+ * <p>
+ * Do <strong>NOT</strong> directly reference this class. It exists for internal use by the API.
+ */
+@ApiStatus.Internal
+public interface ComputerCraftAPIClientService {
+    static ComputerCraftAPIClientService get() {
+        var instance = Instance.INSTANCE;
+        return instance == null ? Services.raise(ComputerCraftAPIClientService.class, Instance.ERROR) : instance;
+    }
+
+    Codec<TurtleUpgradeModel.Unbaked> getTurtleUpgradeModelCodec();
+
+    final class Instance {
+        static final @Nullable ComputerCraftAPIClientService INSTANCE;
+        static final @Nullable Throwable ERROR;
+
+        static {
+            var helper = Services.tryLoad(ComputerCraftAPIClientService.class);
+            INSTANCE = helper.instance();
+            ERROR = helper.error();
+        }
+
+        private Instance() {
+        }
+    }
+}

projects/common-api/src/main/java/dan200/computercraft/api/ComputerCraftAPI.java

@@ -11,8 +11,6 @@ import dan200.computercraft.api.lua.GenericSource;
 import dan200.computercraft.api.lua.IComputerSystem;
 import dan200.computercraft.api.lua.ILuaAPI;
 import dan200.computercraft.api.lua.ILuaAPIFactory;
-import dan200.computercraft.api.media.IMedia;
-import dan200.computercraft.api.media.MediaProvider;
 import dan200.computercraft.api.network.PacketNetwork;
 import dan200.computercraft.api.network.wired.WiredElement;
 import dan200.computercraft.api.network.wired.WiredNode;
@@ -142,19 +140,6 @@ public final class ComputerCraftAPI {
         return getInstance().getBundledRedstoneOutput(world, pos, side);
     }
 
-    /**
-     * Registers a media provider to provide {@link IMedia} implementations for Items.
-     *
-     * @param provider The media provider to register.
-     * @see MediaProvider
-     * @deprecated Prefer {@code dan200.computercraft.api.media.MediaLookup} (Fabric) or
-     * {@code dan200.computercraft.api.media.MediaCapability} (NeoForge).
-     */
-    @Deprecated
-    public static void registerMediaProvider(MediaProvider provider) {
-        getInstance().registerMediaProvider(provider);
-    }
-
     /**
      * Attempt to get the game-wide wireless network.
      *

projects/common-api/src/main/java/dan200/computercraft/api/ComputerCraftTags.java

@@ -28,6 +28,20 @@ public class ComputerCraftTags {
         public static final TagKey<Item> WIRED_MODEM = make("wired_modem");
         public static final TagKey<Item> MONITOR = make("monitor");
 
+        /**
+         * Floppy disks. Both the read/write version, and treasure disks.
+         *
+         * @since 1.116.0
+         */
+        public static final TagKey<Item> DISKS = make("disks");
+
+        /**
+         * All pocket computers.
+         *
+         * @since 1.116.0
+         */
+        public static final TagKey<Item> POCKET_COMPUTERS = make("pocket_computers");
+
         /**
          * Items which can be {@linkplain Item#use(Level, Player, InteractionHand) used} when calling
          * {@code turtle.place()}.

projects/common-api/src/main/java/dan200/computercraft/api/component/ComputerComponents.java

@@ -6,6 +6,7 @@ package dan200.computercraft.api.component;
 
 import dan200.computercraft.api.ComputerCraftAPI;
 import dan200.computercraft.api.pocket.IPocketAccess;
+import dan200.computercraft.api.pocket.PocketComputer;
 import dan200.computercraft.api.turtle.ITurtleAccess;
 
 /**
@@ -20,7 +21,7 @@ public class ComputerComponents {
     /**
      * The {@link IPocketAccess} associated with a pocket computer.
      */
-    public static final ComputerComponent<IPocketAccess> POCKET = ComputerComponent.create(ComputerCraftAPI.MOD_ID, "pocket");
+    public static final ComputerComponent<PocketComputer> POCKET = ComputerComponent.create(ComputerCraftAPI.MOD_ID, "pocket");
 
     /**
      * This component is only present on "command computers", and other computers with admin capabilities.

projects/common-api/src/main/java/dan200/computercraft/api/detail/ComponentDetailProvider.java

@@ -51,10 +51,10 @@ public abstract class ComponentDetailProvider<T> implements DetailProvider<DataC
      * This method is always called on the server thread, so it is safe to interact with the world here, but you should
      * take care to avoid long blocking operations as this will stall the server and other computers.
      *
-     * @param data The full details to be returned for this item stack. New properties should be added to this map.
-     * @param item The component to provide details for.
+     * @param data      The full details to be returned for this item stack. New properties should be added to this map.
+     * @param component The component to provide details for.
      */
-    public abstract void provideComponentDetails(Map<? super String, Object> data, T item);
+    public abstract void provideComponentDetails(Map<? super String, Object> data, T component);
 
     @Override
     public final void provideDetails(Map<? super String, Object> data, DataComponentHolder holder) {

projects/common-api/src/main/java/dan200/computercraft/api/media/MediaProvider.java

@@ -1,26 +0,0 @@
-// Copyright Daniel Ratcliffe, 2011-2022. This API may be redistributed unmodified and in full only.
-//
-// SPDX-License-Identifier: LicenseRef-CCPL
-
-package dan200.computercraft.api.media;
-
-import net.minecraft.world.item.ItemStack;
-import org.jspecify.annotations.Nullable;
-
-/**
- * This interface is used to provide {@link IMedia} implementations for {@link ItemStack}.
- *
- * @see dan200.computercraft.api.ComputerCraftAPI#registerMediaProvider(MediaProvider)
- */
-@FunctionalInterface
-public interface MediaProvider {
-    /**
-     * Produce an IMedia implementation from an ItemStack.
-     *
-     * @param stack The stack from which to extract the media information.
-     * @return An {@link IMedia} implementation, or {@code null} if the item is not something you wish to handle
-     * @see dan200.computercraft.api.ComputerCraftAPI#registerMediaProvider(MediaProvider)
-     */
-    @Nullable
-    IMedia getMedia(ItemStack stack);
-}

projects/common-api/src/main/java/dan200/computercraft/api/pocket/IPocketAccess.java

@@ -7,60 +7,15 @@ package dan200.computercraft.api.pocket;
 import dan200.computercraft.api.upgrades.UpgradeBase;
 import dan200.computercraft.api.upgrades.UpgradeData;
 import net.minecraft.core.component.DataComponentPatch;
-import net.minecraft.server.level.ServerLevel;
-import net.minecraft.world.entity.Entity;
 import net.minecraft.world.item.ItemStack;
-import net.minecraft.world.phys.Vec3;
 import org.jetbrains.annotations.ApiStatus;
 import org.jspecify.annotations.Nullable;
 
 /**
- * Wrapper class for pocket computers.
+ * Access to a pocket computer for {@linkplain IPocketUpgrade pocket upgrades}.
  */
 @ApiStatus.NonExtendable
-public interface IPocketAccess {
-    /**
-     * Get the level in which the pocket computer exists.
-     *
-     * @return The pocket computer's level.
-     */
-    ServerLevel getLevel();
-
-    /**
-     * Get the position of the pocket computer.
-     *
-     * @return The pocket computer's position.
-     */
-    Vec3 getPosition();
-
-    /**
-     * Gets the entity holding this item.
-     * <p>
-     * This must be called on the server thread.
-     *
-     * @return The holding entity, or {@code null} if none exists.
-     */
-    @Nullable
-    Entity getEntity();
-
-    /**
-     * Get the colour of this pocket computer as a RGB number.
-     *
-     * @return The colour this pocket computer is. This will be a RGB colour between {@code 0x000000} and
-     * {@code 0xFFFFFF} or -1 if it has no colour.
-     * @see #setColour(int)
-     */
-    int getColour();
-
-    /**
-     * Set the colour of the pocket computer to a RGB number.
-     *
-     * @param colour The colour this pocket computer should be changed to. This should be a RGB colour between
-     *               {@code 0x000000} and {@code 0xFFFFFF} or -1 to reset to the default colour.
-     * @see #getColour()
-     */
-    void setColour(int colour);
-
+public interface IPocketAccess extends PocketComputer {
     /**
      * Get the colour of this pocket computer's light as a RGB number.
      *
@@ -92,7 +47,8 @@ public interface IPocketAccess {
     /**
      * Set the upgrade for this pocket computer, also updating the item stack.
      * <p>
-     * Note this method is not thread safe - it must be called from the server thread.
+     * This method can only be called from the main server thread, when this computer is {@linkplain #isActive() is
+     * active}.
      *
      * @param upgrade The new upgrade to set it to, may be {@code null}.
      * @see #getUpgrade()
@@ -114,6 +70,9 @@ public interface IPocketAccess {
 
     /**
      * Update the upgrade-specific data.
+     * <p>
+     * This method can only be called from the main server thread, when this computer is {@linkplain #isActive() is
+     * active}.
      *
      * @param data The new upgrade data.
      * @see #getUpgradeData()

projects/common-api/src/main/java/dan200/computercraft/api/pocket/IPocketUpgrade.java

@@ -12,7 +12,7 @@ import dan200.computercraft.impl.ComputerCraftAPIService;
 import net.minecraft.core.Registry;
 import net.minecraft.resources.ResourceKey;
 import net.minecraft.resources.ResourceLocation;
-import net.minecraft.world.level.Level;
+import net.minecraft.server.level.ServerLevel;
 import org.jspecify.annotations.Nullable;
 
 /**
@@ -71,7 +71,7 @@ public interface IPocketUpgrade extends UpgradeBase {
     /**
      * Called when the pocket computer is right clicked.
      *
-     * @param world      The world the computer is in.
+     * @param level      The world the computer is in.
      * @param access     The access object for the pocket item stack.
      * @param peripheral The peripheral for this upgrade.
      * @return {@code true} to stop the GUI from opening, otherwise false. You should always provide some code path
@@ -79,7 +79,7 @@ public interface IPocketUpgrade extends UpgradeBase {
      * access the GUI.
      * @see #createPeripheral(IPocketAccess)
      */
-    default boolean onRightClick(Level world, IPocketAccess access, @Nullable IPeripheral peripheral) {
+    default boolean onRightClick(ServerLevel level, IPocketAccess access, @Nullable IPeripheral peripheral) {
         return false;
     }
 }

projects/common-api/src/main/java/dan200/computercraft/api/pocket/PocketComputer.java

@@ -0,0 +1,81 @@
+// SPDX-FileCopyrightText: 2025 The CC: Tweaked Developers
+//
+// SPDX-License-Identifier: MPL-2.0
+
+package dan200.computercraft.api.pocket;
+
+import net.minecraft.server.level.ServerLevel;
+import net.minecraft.world.entity.Entity;
+import net.minecraft.world.phys.Vec3;
+import org.jetbrains.annotations.ApiStatus;
+import org.jspecify.annotations.Nullable;
+
+/**
+ * A pocket computer.
+ *
+ * @see IPocketAccess
+ * @see dan200.computercraft.api.component.ComputerComponents#POCKET
+ */
+@ApiStatus.NonExtendable
+public interface PocketComputer {
+    /**
+     * Get the level in which the pocket computer exists.
+     *
+     * @return The pocket computer's level.
+     */
+    ServerLevel getLevel();
+
+    /**
+     * Get the position of the pocket computer.
+     *
+     * @return The pocket computer's position.
+     */
+    Vec3 getPosition();
+
+    /**
+     * Gets the entity holding this item.
+     * <p>
+     * This must be called on the server thread.
+     *
+     * @return The holding entity, or {@code null} if none exists.
+     */
+    @Nullable
+    Entity getEntity();
+
+    /**
+     * Check whether this pocket computer is currently being held by a player, lectern, or other valid entity.
+     * <p>
+     * As pocket computers are backed by item stacks, you must check for validity before updating the computer.
+     * <p>
+     * This must be called on the server thread.
+     *
+     * @return Whether this computer is active.
+     */
+    boolean isActive();
+
+    /**
+     * Get the colour of this pocket computer as an RGB number.
+     *
+     * <p>
+     * This method can only be called from the main server thread, when this computer is {@linkplain #isActive() is
+     * active}.
+     *
+     * @return The colour this pocket computer is. This will be a RGB colour between {@code 0x000000} and
+     * {@code 0xFFFFFF} or -1 if it has no colour.
+     * @see #setColour(int)
+     */
+    int getColour();
+
+    /**
+     * Set the colour of the pocket computer to an RGB number.
+     * <p>
+     * This method can only be called from the main server thread, when this computer is {@linkplain #isActive() is
+     * active}.
+     *
+     * @param colour The colour this pocket computer should be changed to. This should be a RGB colour between
+     *               {@code 0x000000} and {@code 0xFFFFFF} or -1 to reset to the default colour.
+     * @see #getColour()
+     */
+    void setColour(int colour);
+
+}

projects/common-api/src/main/java/dan200/computercraft/api/turtle/ITurtleUpgrade.java

@@ -51,16 +51,6 @@ import java.util.function.Function;
  * <h4>Forge</h4>
  * {@snippet class=com.example.examplemod.ForgeExampleMod region=turtle_upgrades}
  *
- * <h3>Rendering the upgrade</h3>
- * Next, we need to register a model for our upgrade. This is done by registering a
- * {@link dan200.computercraft.api.client.turtle.TurtleUpgradeModeller} for your upgrade type.
- *
- * <h4>Fabric</h4>
- * {@snippet class=com.example.examplemod.FabricExampleModClient region=turtle_modellers}
- *
- * <h4>Forge</h4>
- * {@snippet class=com.example.examplemod.FabricExampleModClient region=turtle_modellers}
- *
  * <h3 id="datagen">Registering the upgrade itself</h3>
  * Upgrades themselves are loaded from datapacks when a level is loaded. In order to register our new upgrade, we must
  * create a new JSON file at {@code data/<my_mod>/computercraft/turtle_upgrade/<my_upgrade_id>.json}.
@@ -71,8 +61,15 @@ import java.util.function.Function;
  * by the type itself. As our upgrade was defined with {@link UpgradeType#simpleWithCustomItem(Function)}, the
  * {@code "item"} field will construct our upgrade with {@link Items#COMPASS}.
  * <p>
- * Rather than manually creating the file, it is recommended to use data-generators to generate this file. First, we
- * register our new upgrades into a {@linkplain PatchedRegistries patched registry}.
+ * Similarly, {@linkplain dan200.computercraft.api.client.turtle.TurtleUpgradeModel the upgrade's model} is loaded from
+ * a resource pack, and so we must also create a new JSON file at
+ * {@code assets/<my_mod>/computercraft/turtle_upgrade/<my_upgrade_id>.json}.
+ *
+ * {@snippet file=assets/examplemod/computercraft/turtle_upgrade/example_turtle_upgrade.json}
+ *
+ * Rather than manually creating these file, it is recommended to use data-generators to generate this file. First, we
+ * register our new upgrades into a {@linkplain PatchedRegistries patched registry}. Models must similarly be
+ * registered.
  *
  * {@snippet class=com.example.examplemod.data.TurtleUpgradeProvider region=body}
  *

projects/common-api/src/main/java/dan200/computercraft/api/turtle/TurtleSide.java

@@ -4,17 +4,33 @@
 
 package dan200.computercraft.api.turtle;
 
+import com.mojang.serialization.Codec;
+import net.minecraft.util.StringRepresentable;
+
 /**
  * An enum representing the two sides of the turtle that a turtle upgrade might reside.
  */
-public enum TurtleSide {
+public enum TurtleSide implements StringRepresentable {
     /**
      * The turtle's left side (where the pickaxe usually is on a Wireless Mining Turtle).
      */
-    LEFT,
+    LEFT("left"),
 
     /**
      * The turtle's right side (where the modem usually is on a Wireless Mining Turtle).
      */
-    RIGHT,
+    RIGHT("right");
+
+    public static final Codec<TurtleSide> CODEC = StringRepresentable.fromEnum(TurtleSide::values);
+
+    private final String name;
+
+    TurtleSide(String name) {
+        this.name = name;
+    }
+
+    @Override
+    public String getSerializedName() {
+        return name;
+    }
 }

projects/common-api/src/main/java/dan200/computercraft/api/upgrades/UpgradeData.java

@@ -7,8 +7,11 @@ package dan200.computercraft.api.upgrades;
 import dan200.computercraft.api.pocket.IPocketUpgrade;
 import dan200.computercraft.api.turtle.ITurtleUpgrade;
 import net.minecraft.core.Holder;
+import net.minecraft.core.component.DataComponentGetter;
 import net.minecraft.core.component.DataComponentPatch;
+import net.minecraft.core.component.DataComponentType;
 import net.minecraft.world.item.ItemStack;
+import org.jspecify.annotations.Nullable;
 
 /**
  * An upgrade (i.e. a {@link ITurtleUpgrade}) and its current upgrade data.
@@ -17,7 +20,9 @@ import net.minecraft.world.item.ItemStack;
  * @param data   The upgrade's data.
  * @param <T>    The type of upgrade, either {@link ITurtleUpgrade} or {@link IPocketUpgrade}.
  */
-public record UpgradeData<T extends UpgradeBase>(Holder.Reference<T> holder, DataComponentPatch data) {
+public record UpgradeData<T extends UpgradeBase>(
+    Holder.Reference<T> holder, DataComponentPatch data
+) implements DataComponentGetter {
     /**
      * A utility method to construct a new {@link UpgradeData} instance.
      *
@@ -66,4 +71,17 @@ public record UpgradeData<T extends UpgradeBase>(Holder.Reference<T> holder, Dat
     public ItemStack getUpgradeItem() {
         return upgrade().getUpgradeItem(data).copy();
     }
+
+    /**
+     * Get a component from the upgrade's {@link #data()} .
+     *
+     * @param component The component get.
+     * @param <U>       The type of the component's value.
+     * @return The component, or {@code null} if not present.
+     */
+    @Override
+    public <U> @Nullable U get(DataComponentType<? extends U> component) {
+        var result = data().get(component);
+        return result == null ? null : result.orElse(null);
+    }
 }

projects/common-api/src/main/java/dan200/computercraft/api/upgrades/UpgradeType.java

@@ -39,7 +39,7 @@ import java.util.function.Function;
  * @see ITurtleUpgrade
  * @see IPocketUpgrade
  */
-public interface UpgradeType<T extends UpgradeBase> {
+public sealed interface UpgradeType<T extends UpgradeBase> permits UpgradeTypeImpl {
     /**
      * The codec to read and write this upgrade from a datapack.
      *

projects/common-api/src/main/java/dan200/computercraft/impl/ComputerCraftAPIService.java

@@ -12,7 +12,6 @@ import dan200.computercraft.api.filesystem.Mount;
 import dan200.computercraft.api.filesystem.WritableMount;
 import dan200.computercraft.api.lua.GenericSource;
 import dan200.computercraft.api.lua.ILuaAPIFactory;
-import dan200.computercraft.api.media.MediaProvider;
 import dan200.computercraft.api.media.PrintoutContents;
 import dan200.computercraft.api.network.PacketNetwork;
 import dan200.computercraft.api.network.wired.WiredElement;
@@ -60,8 +59,6 @@ public interface ComputerCraftAPIService {
 
     int getBundledRedstoneOutput(Level world, BlockPos pos, Direction side);
 
-    void registerMediaProvider(MediaProvider provider);
-
     PacketNetwork getWirelessNetwork(MinecraftServer server);
 
     void registerAPIFactory(ILuaAPIFactory factory);

projects/common/build.gradle.kts

@@ -39,7 +39,6 @@ dependencies {
     compileOnly(libs.mixin)
     compileOnly(libs.mixinExtra)
     compileOnly(libs.bundles.externalMods.common)
-    clientCompileOnly(variantOf(libs.emi) { classifier("api") })
 
     annotationProcessorEverywhere(libs.autoService)
     testFixturesAnnotationProcessor(libs.autoService)

projects/common/src/client/java/dan200/computercraft/client/ClientHooks.java

@@ -6,12 +6,12 @@ package dan200.computercraft.client;
 
 import com.mojang.blaze3d.audio.Channel;
 import com.mojang.blaze3d.vertex.PoseStack;
-import dan200.computercraft.api.turtle.TurtleSide;
+import com.mojang.math.Axis;
 import dan200.computercraft.client.pocket.ClientPocketComputers;
 import dan200.computercraft.client.render.CableHighlightRenderer;
+import dan200.computercraft.client.render.ExtendedItemFrameRenderState;
 import dan200.computercraft.client.render.PocketItemRenderer;
 import dan200.computercraft.client.render.PrintoutItemRenderer;
-import dan200.computercraft.client.render.monitor.MonitorBlockEntityRenderer;
 import dan200.computercraft.client.render.monitor.MonitorHighlightRenderer;
 import dan200.computercraft.client.render.monitor.MonitorRenderState;
 import dan200.computercraft.client.sound.SpeakerManager;
@@ -21,26 +21,22 @@ import dan200.computercraft.shared.media.items.PrintoutItem;
 import dan200.computercraft.shared.peripheral.modem.wired.CableBlock;
 import dan200.computercraft.shared.peripheral.modem.wired.CableModemVariant;
 import dan200.computercraft.shared.peripheral.modem.wired.CableShapes;
-import dan200.computercraft.shared.peripheral.monitor.MonitorBlockEntity;
 import dan200.computercraft.shared.pocket.items.PocketComputerItem;
-import dan200.computercraft.shared.turtle.blocks.TurtleBlockEntity;
 import dan200.computercraft.shared.util.PauseAwareTimer;
 import dan200.computercraft.shared.util.WorldUtil;
 import net.minecraft.client.Camera;
 import net.minecraft.client.Minecraft;
 import net.minecraft.client.renderer.MultiBufferSource;
+import net.minecraft.client.renderer.SubmitNodeCollector;
+import net.minecraft.client.renderer.entity.state.ItemFrameRenderState;
 import net.minecraft.client.sounds.AudioStream;
 import net.minecraft.client.sounds.SoundEngine;
 import net.minecraft.core.BlockPos;
 import net.minecraft.world.InteractionHand;
-import net.minecraft.world.entity.decoration.ItemFrame;
 import net.minecraft.world.item.ItemStack;
 import net.minecraft.world.level.block.state.BlockState;
 import net.minecraft.world.phys.BlockHitResult;
 import net.minecraft.world.phys.HitResult;
-import org.jspecify.annotations.Nullable;
-
-import java.util.function.Consumer;
 
 /**
  * Event listeners for client-only code.
@@ -71,29 +67,31 @@ public final class ClientHooks {
     }
 
     public static boolean drawHighlight(PoseStack transform, MultiBufferSource bufferSource, Camera camera, BlockHitResult hit) {
+        // TODO: Reconsider this API once https://github.com/FabricMC/fabric/pull/4906/ is merged.
         return CableHighlightRenderer.drawHighlight(transform, bufferSource, camera, hit)
             || MonitorHighlightRenderer.drawHighlight(transform, bufferSource, camera, hit);
     }
 
     public static boolean onRenderHeldItem(
-        PoseStack transform, MultiBufferSource render, int lightTexture, InteractionHand hand,
+        PoseStack transform, SubmitNodeCollector collector, int lightTexture, InteractionHand hand,
         float pitch, float equipProgress, float swingProgress, ItemStack stack
     ) {
         if (stack.getItem() instanceof PocketComputerItem) {
-            PocketItemRenderer.INSTANCE.renderItemFirstPerson(transform, render, lightTexture, hand, pitch, equipProgress, swingProgress, stack);
+            PocketItemRenderer.INSTANCE.renderItemFirstPerson(transform, collector, lightTexture, hand, pitch, equipProgress, swingProgress, stack);
             return true;
         }
         if (stack.getItem() instanceof PrintoutItem) {
-            PrintoutItemRenderer.INSTANCE.renderItemFirstPerson(transform, render, lightTexture, hand, pitch, equipProgress, swingProgress, stack);
+            PrintoutItemRenderer.INSTANCE.renderItemFirstPerson(transform, collector, lightTexture, hand, pitch, equipProgress, swingProgress, stack);
             return true;
         }
 
         return false;
     }
 
-    public static boolean onRenderItemFrame(PoseStack transform, MultiBufferSource render, ItemFrame frame, ItemStack stack, int light) {
-        if (stack.getItem() instanceof PrintoutItem) {
-            PrintoutItemRenderer.onRenderInFrame(transform, render, frame, stack, light);
+    public static boolean onRenderItemFrame(PoseStack transform, SubmitNodeCollector render, ItemFrameRenderState frame, ExtendedItemFrameRenderState state) {
+        if (state.printoutData != null) {
+            transform.mulPose(Axis.ZP.rotationDegrees(frame.rotation * 360.0f / 8.0f));
+            PrintoutItemRenderer.onRenderInFrame(transform, render, frame, state.printoutData, state.isBook);
             return true;
         }
 
@@ -104,62 +102,20 @@ public final class ClientHooks {
         SpeakerManager.onPlayStreaming(engine, channel, stream);
     }
 
-    /**
-     * Add additional information about the currently targeted block to the debug screen.
-     *
-     * @param addText A callback which adds a single line of text.
-     */
-    public static void addBlockDebugInfo(Consumer<String> addText) {
-        var minecraft = Minecraft.getInstance();
-        if (!minecraft.getDebugOverlay().showDebugScreen() || minecraft.level == null) return;
-        if (minecraft.hitResult == null || minecraft.hitResult.getType() != HitResult.Type.BLOCK) return;
-
-        var tile = minecraft.level.getBlockEntity(((BlockHitResult) minecraft.hitResult).getBlockPos());
-
-        if (tile instanceof MonitorBlockEntity monitor) {
-            addText.accept("");
-            addText.accept(
-                String.format("Targeted monitor: (%d, %d), %d x %d", monitor.getXIndex(), monitor.getYIndex(), monitor.getWidth(), monitor.getHeight())
-            );
-        } else if (tile instanceof TurtleBlockEntity turtle) {
-            addText.accept("");
-            addText.accept("Targeted turtle:");
-            addText.accept(String.format("Id: %d", turtle.getComputerID()));
-            addTurtleUpgrade(addText, turtle, TurtleSide.LEFT);
-            addTurtleUpgrade(addText, turtle, TurtleSide.RIGHT);
-        }
-    }
-
-    private static void addTurtleUpgrade(Consumer<String> out, TurtleBlockEntity turtle, TurtleSide side) {
-        var upgrade = turtle.getAccess().getUpgradeWithData(side);
-        if (upgrade != null) out.accept(String.format("Upgrade[%s]: %s", side, upgrade.holder().key().location()));
-    }
-
-    /**
-     * Add additional information about the game to the debug screen.
-     *
-     * @param addText A callback which adds a single line of text.
-     */
-    public static void addGameDebugInfo(Consumer<String> addText) {
-        if (MonitorBlockEntityRenderer.hasRenderedThisFrame() && Minecraft.getInstance().getDebugOverlay().showDebugScreen()) {
-            addText.accept("[CC:T] Monitor renderer: " + MonitorBlockEntityRenderer.currentRenderer());
-        }
-    }
-
-    public static @Nullable BlockState getBlockBreakingState(BlockState state, BlockPos pos) {
+    public static BlockState getBlockBreakingState(BlockState state, BlockPos pos) {
         // Only apply to cables which have both a cable and modem
         if (state.getBlock() != ModRegistry.Blocks.CABLE.get()
             || !state.getValue(CableBlock.CABLE)
             || state.getValue(CableBlock.MODEM) == CableModemVariant.None
         ) {
-            return null;
+            return state;
         }
 
         var hit = Minecraft.getInstance().hitResult;
-        if (hit == null || hit.getType() != HitResult.Type.BLOCK) return null;
+        if (hit == null || hit.getType() != HitResult.Type.BLOCK) return state;
         var hitPos = ((BlockHitResult) hit).getBlockPos();
 
-        if (!hitPos.equals(pos)) return null;
+        if (!hitPos.equals(pos)) return state;
 
         return WorldUtil.isVecInside(CableShapes.getModemShape(state), hit.getLocation().subtract(pos.getX(), pos.getY(), pos.getZ()))
             ? state.getBlock().defaultBlockState().setValue(CableBlock.MODEM, state.getValue(CableBlock.MODEM))

projects/common/src/client/java/dan200/computercraft/client/ClientRegistry.java

@@ -4,60 +4,59 @@
 
 package dan200.computercraft.client;
 
-import com.mojang.brigadier.CommandDispatcher;
-import com.mojang.brigadier.arguments.IntegerArgumentType;
-import com.mojang.brigadier.builder.LiteralArgumentBuilder;
-import com.mojang.brigadier.builder.RequiredArgumentBuilder;
-import dan200.computercraft.api.ComputerCraftAPI;
-import dan200.computercraft.api.client.turtle.RegisterTurtleUpgradeModeller;
-import dan200.computercraft.api.client.turtle.TurtleUpgradeModeller;
+import com.mojang.serialization.MapCodec;
+import dan200.computercraft.api.client.StandaloneModel;
+import dan200.computercraft.api.client.turtle.*;
 import dan200.computercraft.client.gui.*;
-import dan200.computercraft.client.pocket.ClientPocketComputers;
+import dan200.computercraft.client.item.colour.PocketComputerLight;
+import dan200.computercraft.client.item.model.TurtleOverlayModel;
+import dan200.computercraft.client.item.properties.PocketComputerStateProperty;
+import dan200.computercraft.client.item.properties.TurtleShowElfOverlay;
+import dan200.computercraft.client.model.LecternBookModel;
+import dan200.computercraft.client.model.LecternPocketModel;
+import dan200.computercraft.client.model.LecternPrintoutModel;
+import dan200.computercraft.client.platform.ClientPlatformHelper;
+import dan200.computercraft.client.platform.ModelKey;
 import dan200.computercraft.client.render.CustomLecternRenderer;
-import dan200.computercraft.client.render.RenderTypes;
 import dan200.computercraft.client.render.TurtleBlockEntityRenderer;
 import dan200.computercraft.client.render.monitor.MonitorBlockEntityRenderer;
-import dan200.computercraft.client.turtle.TurtleModemModeller;
-import dan200.computercraft.client.turtle.TurtleUpgradeModellers;
-import dan200.computercraft.core.util.Colour;
+import dan200.computercraft.client.turtle.TurtleOverlay;
+import dan200.computercraft.client.turtle.TurtleOverlayManager;
+import dan200.computercraft.client.turtle.TurtleUpgradeModelManager;
 import dan200.computercraft.shared.ModRegistry;
-import dan200.computercraft.shared.command.CommandComputerCraft;
-import dan200.computercraft.shared.computer.core.ComputerState;
-import dan200.computercraft.shared.computer.core.ServerContext;
 import dan200.computercraft.shared.computer.inventory.AbstractComputerMenu;
-import dan200.computercraft.shared.media.items.DiskItem;
-import dan200.computercraft.shared.turtle.TurtleOverlay;
-import net.minecraft.Util;
-import net.minecraft.client.Minecraft;
-import net.minecraft.client.color.item.ItemColor;
+import net.minecraft.client.color.item.ItemTintSource;
+import net.minecraft.client.gui.components.debug.DebugScreenEntry;
+import net.minecraft.client.gui.render.pip.PictureInPictureRenderer;
+import net.minecraft.client.gui.render.state.pip.PictureInPictureRenderState;
 import net.minecraft.client.gui.screens.MenuScreens;
 import net.minecraft.client.gui.screens.Screen;
 import net.minecraft.client.gui.screens.inventory.MenuAccess;
-import net.minecraft.client.multiplayer.ClientLevel;
-import net.minecraft.client.renderer.ShaderInstance;
+import net.minecraft.client.model.geom.ModelLayerLocation;
+import net.minecraft.client.model.geom.builders.LayerDefinition;
+import net.minecraft.client.renderer.MultiBufferSource;
 import net.minecraft.client.renderer.blockentity.BlockEntityRendererProvider;
 import net.minecraft.client.renderer.blockentity.BlockEntityRenderers;
-import net.minecraft.client.renderer.item.ClampedItemPropertyFunction;
-import net.minecraft.client.renderer.item.ItemProperties;
-import net.minecraft.network.chat.Component;
+import net.minecraft.client.renderer.item.ItemModel;
+import net.minecraft.client.renderer.item.properties.conditional.ConditionalItemModelProperty;
+import net.minecraft.client.renderer.item.properties.select.SelectItemModelProperty;
+import net.minecraft.client.resources.model.MissingBlockModel;
+import net.minecraft.client.resources.model.ModelBaker;
+import net.minecraft.client.resources.model.ModelManager;
+import net.minecraft.client.resources.model.ResolvableModel;
 import net.minecraft.resources.ResourceLocation;
-import net.minecraft.server.packs.resources.PreparableReloadListener;
-import net.minecraft.server.packs.resources.ResourceProvider;
-import net.minecraft.util.FastColor;
-import net.minecraft.world.entity.LivingEntity;
+import net.minecraft.server.packs.resources.ResourceManager;
 import net.minecraft.world.inventory.AbstractContainerMenu;
 import net.minecraft.world.inventory.MenuType;
-import net.minecraft.world.item.Item;
-import net.minecraft.world.item.ItemStack;
-import net.minecraft.world.item.component.DyedItemColor;
-import net.minecraft.world.level.ItemLike;
-import org.jspecify.annotations.Nullable;
 
-import java.io.File;
-import java.io.IOException;
-import java.util.Collection;
+import java.util.Map;
+import java.util.Objects;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.Executor;
 import java.util.function.BiConsumer;
-import java.util.function.Consumer;
+import java.util.function.BiFunction;
+import java.util.function.Function;
 import java.util.function.Supplier;
 
 /**
@@ -72,6 +71,19 @@ public final class ClientRegistry {
     private ClientRegistry() {
     }
 
+    private static final Map<ResourceLocation, ModelKey<StandaloneModel>> models = new ConcurrentHashMap<>();
+
+    public static ModelKey<StandaloneModel> getModel(ResourceLocation model) {
+        return models.computeIfAbsent(model, m -> ClientPlatformHelper.get().createModelKey(m::toString));
+    }
+
+    public static StandaloneModel getModel(ModelManager manager, ResourceLocation modelId) {
+        var model = getModel(modelId).get(manager);
+        if (model != null) return model;
+
+        return Objects.requireNonNull(getModel(MissingBlockModel.LOCATION).get(manager));
+    }
+
     /**
      * Register any client-side objects which don't have to be done on the main thread.
      */
@@ -83,25 +95,6 @@ public final class ClientRegistry {
         BlockEntityRenderers.register(ModRegistry.BlockEntities.LECTERN.get(), CustomLecternRenderer::new);
     }
 
-    /**
-     * Register any client-side objects which must be done on the main thread.
-     *
-     * @param itemProperties Callback to register item properties.
-     */
-    public static void registerMainThread(RegisterItemProperty itemProperties) {
-        registerItemProperty(itemProperties, "state",
-            new UnclampedPropertyFunction((stack, world, player, random) -> {
-                var computer = ClientPocketComputers.get(stack);
-                return (computer == null ? ComputerState.OFF : computer.getState()).ordinal();
-            }),
-            ModRegistry.Items.POCKET_COMPUTER_NORMAL, ModRegistry.Items.POCKET_COMPUTER_ADVANCED
-        );
-        registerItemProperty(itemProperties, "coloured",
-            (stack, world, player, random) -> DyedItemColor.getOrDefault(stack, -1) != -1 ? 1 : 0,
-            ModRegistry.Items.POCKET_COMPUTER_NORMAL, ModRegistry.Items.POCKET_COMPUTER_ADVANCED
-        );
-    }
-
     public static void registerMenuScreens(RegisterMenuScreen register) {
         register.<AbstractComputerMenu, ComputerScreen<AbstractComputerMenu>>register(ModRegistry.Menus.COMPUTER.get(), ComputerScreen::new);
         register.<AbstractComputerMenu, NoTermComputerScreen<AbstractComputerMenu>>register(ModRegistry.Menus.POCKET_COMPUTER_NO_TERM.get(), NoTermComputerScreen::new);
@@ -116,138 +109,112 @@ public final class ClientRegistry {
         <M extends AbstractContainerMenu, U extends Screen & MenuAccess<M>> void register(MenuType<? extends M> type, MenuScreens.ScreenConstructor<M, U> factory);
     }
 
-    public static void registerTurtleModellers(RegisterTurtleUpgradeModeller register) {
-        register.register(ModRegistry.TurtleUpgradeTypes.SPEAKER.get(), TurtleUpgradeModeller.sided(
-            ResourceLocation.fromNamespaceAndPath(ComputerCraftAPI.MOD_ID, "block/turtle_speaker_left"),
-            ResourceLocation.fromNamespaceAndPath(ComputerCraftAPI.MOD_ID, "block/turtle_speaker_right")
-        ));
-        register.register(ModRegistry.TurtleUpgradeTypes.WORKBENCH.get(), TurtleUpgradeModeller.sided(
-            ResourceLocation.fromNamespaceAndPath(ComputerCraftAPI.MOD_ID, "block/turtle_crafting_table_left"),
-            ResourceLocation.fromNamespaceAndPath(ComputerCraftAPI.MOD_ID, "block/turtle_crafting_table_right")
-        ));
-        register.register(ModRegistry.TurtleUpgradeTypes.WIRELESS_MODEM.get(), new TurtleModemModeller());
-        register.register(ModRegistry.TurtleUpgradeTypes.TOOL.get(), TurtleUpgradeModeller.flatItem());
-    }
-
-    @SafeVarargs
-    private static void registerItemProperty(RegisterItemProperty itemProperties, String name, ClampedItemPropertyFunction getter, Supplier<? extends Item>... items) {
-        var id = ResourceLocation.fromNamespaceAndPath(ComputerCraftAPI.MOD_ID, name);
-        for (var item : items) itemProperties.register(item.get(), id, getter);
-    }
-
-    /**
-     * Register an item property via {@link ItemProperties#register}. Forge and Fabric expose different methods, so we
-     * supply this via mod-loader-specific code.
-     */
-    public interface RegisterItemProperty {
-        void register(Item item, ResourceLocation name, ClampedItemPropertyFunction property);
-    }
-
-    public static void registerReloadListeners(Consumer<PreparableReloadListener> register, Minecraft minecraft) {
-        register.accept(GuiSprites.initialise(minecraft.getTextureManager()));
+    public static void registerTurtleModels(RegisterTurtleUpgradeModel register) {
+        register.register(BasicUpgradeModel.ID, BasicUpgradeModel.CODEC);
+        register.register(ItemUpgradeModel.ID, ItemUpgradeModel.CODEC);
+        register.register(SelectUpgradeModel.ID, SelectUpgradeModel.CODEC);
     }
 
     private static final ResourceLocation[] EXTRA_MODELS = {
         TurtleOverlay.ELF_MODEL,
+        TurtleBlockEntityRenderer.NORMAL_TURTLE_MODEL,
+        TurtleBlockEntityRenderer.ADVANCED_TURTLE_MODEL,
         TurtleBlockEntityRenderer.COLOUR_TURTLE_MODEL,
+        MissingBlockModel.LOCATION,
     };
 
-    public static void registerExtraModels(Consumer<ResourceLocation> register, Collection<ResourceLocation> extraModels) {
-        for (var model : EXTRA_MODELS) register.accept(model);
-        extraModels.forEach(register);
-        TurtleUpgradeModellers.getDependencies().forEach(register);
-    }
-
-    public static void registerItemColours(BiConsumer<ItemColor, ItemLike> register) {
-        register.accept(
-            (stack, layer) -> layer == 1 ? DiskItem.getColour(stack) : -1,
-            ModRegistry.Items.DISK.get()
-        );
-
-        register.accept(
-            (stack, layer) -> layer == 1 ? DyedItemColor.getOrDefault(stack, Colour.BLUE.getARGB()) : -1,
-            ModRegistry.Items.TREASURE_DISK.get()
-        );
-
-        register.accept(ClientRegistry::getPocketColour, ModRegistry.Items.POCKET_COMPUTER_NORMAL.get());
-        register.accept(ClientRegistry::getPocketColour, ModRegistry.Items.POCKET_COMPUTER_ADVANCED.get());
-
-        register.accept(ClientRegistry::getTurtleColour, ModRegistry.Blocks.TURTLE_NORMAL.get());
-        register.accept(ClientRegistry::getTurtleColour, ModRegistry.Blocks.TURTLE_ADVANCED.get());
-    }
-
-    private static int getPocketColour(ItemStack stack, int layer) {
-        return switch (layer) {
-            default -> -1;
-            case 1 -> DyedItemColor.getOrDefault(stack, -1); // Frame colour
-            case 2 -> { // Light colour
-                var computer = ClientPocketComputers.get(stack);
-                yield computer == null || computer.getLightState() == -1 ? Colour.BLACK.getARGB() : FastColor.ARGB32.opaque(computer.getLightState());
-            }
-        };
-    }
-
-    private static int getTurtleColour(ItemStack stack, int layer) {
-        return layer == 0 ? DyedItemColor.getOrDefault(stack, -1) : -1;
-    }
-
-    public static void registerShaders(ResourceProvider resources, BiConsumer<ShaderInstance, Consumer<ShaderInstance>> load) throws IOException {
-        RenderTypes.registerShaders(resources, load);
-    }
-
-    private record UnclampedPropertyFunction(
-        ClampedItemPropertyFunction function
-    ) implements ClampedItemPropertyFunction {
-        @Override
-        public float unclampedCall(ItemStack stack, @Nullable ClientLevel level, @Nullable LivingEntity entity, int layer) {
-            return function.unclampedCall(stack, level, entity, layer);
-        }
-
-        @Deprecated
-        @Override
-        public float call(ItemStack stack, @Nullable ClientLevel level, @Nullable LivingEntity entity, int layer) {
-            return function.unclampedCall(stack, level, entity, layer);
-        }
+    /**
+     * Additional models to load.
+     *
+     * @param turtleOverlays The unbaked turtle models.
+     * @param turtleUpgrades The unbaked turtle upgrades.
+     * @see #gatherExtraModels(ResourceManager, Executor)
+     * @see #registerExtraModels(RegisterExtraModels, ExtraModels)
+     */
+    public record ExtraModels(
+        Map<ResourceLocation, TurtleOverlay.Unbaked> turtleOverlays,
+        Map<ResourceLocation, TurtleUpgradeModel.Unbaked> turtleUpgrades
+    ) {
     }
 
     /**
-     * Register client-side commands.
+     * Gather the list of extra models to load.
      *
-     * @param dispatcher The dispatcher to register the commands to.
-     * @param sendError  A function to send an error message.
-     * @param <T>        The type of the client-side command context.
+     * @param resources The current resource manager.
+     * @param executor  The executor to schedule loading on.
+     * @return A promise which contains our extra models.
      */
-    public static <T> void registerClientCommands(CommandDispatcher<T> dispatcher, BiConsumer<T, Component> sendError) {
-        dispatcher.register(LiteralArgumentBuilder.<T>literal(CommandComputerCraft.CLIENT_OPEN_FOLDER)
-            .requires(x -> Minecraft.getInstance().getSingleplayerServer() != null)
-            .then(RequiredArgumentBuilder.<T, Integer>argument("computer_id", IntegerArgumentType.integer(0))
-                .executes(c -> handleOpenComputerCommand(c.getSource(), sendError, c.getArgument("computer_id", Integer.class)))
-            ));
+    public static CompletableFuture<ExtraModels> gatherExtraModels(ResourceManager resources, Executor executor) {
+        var turtleOverlays = TurtleOverlayManager.loader().load(resources, executor);
+        var turtleUpgrades = TurtleUpgradeModelManager.loader().load(resources, executor);
+        return turtleOverlays.thenCombine(turtleUpgrades, ExtraModels::new);
     }
 
     /**
-     * Handle the {@link CommandComputerCraft#CLIENT_OPEN_FOLDER} command.
-     *
-     * @param context   The command context.
-     * @param sendError A function to send an error message.
-     * @param id        The computer's id.
-     * @param <T>       The type of the client-side command context.
-     * @return {@code 1} if a folder was opened, {@code 0} otherwise.
+     * A callback used to register a model for a {@link ModelKey}.
      */
-    private static <T> int handleOpenComputerCommand(T context, BiConsumer<T, Component> sendError, int id) {
-        var server = Minecraft.getInstance().getSingleplayerServer();
-        if (server == null) {
-            sendError.accept(context, Component.literal("Not on a single-player server"));
-            return 0;
+    public interface RegisterExtraModels {
+        default <U extends ResolvableModel, T> void register(ModelKey<T> key, U unbaked, BiFunction<U, ModelBaker, T> bake) {
+            register(key, unbaked, ResolvableModel::resolveDependencies, bake);
         }
 
-        var file = new File(ServerContext.get(server).storageDir().toFile(), "computer/" + id);
-        if (!file.isDirectory()) {
-            sendError.accept(context, Component.literal("Computer's folder does not exist"));
-            return 0;
-        }
+        /**
+         * Register an extra model.
+         * <p>
+         * This accepts functions to resolve dependencies and bake the model. While this would be conceptually nicer as
+         * an interface, it would require multiple adaptors to convert between "upgrade model", "a"bstract model" and
+         * "platform-specific model", so working with functions is cleaner.
+         *
+         * @param key     The model key for this model.
+         * @param unbaked The unbaked model.
+         * @param resolve The function to resolve dependencies for this model.
+         * @param bake    The function to bake this model.
+         * @param <U>     The type of unbaked model.
+         * @param <T>     The type of baked model.
+         */
+        <U, T> void register(ModelKey<T> key, U unbaked, BiConsumer<U, ResolvableModel.Resolver> resolve, BiFunction<U, ModelBaker, T> bake);
+    }
 
-        Util.getPlatform().openFile(file);
-        return 1;
+    public static void registerExtraModels(RegisterExtraModels register, ExtraModels models) {
+        for (var model : EXTRA_MODELS) {
+            register.register(getModel(model), model, (id, r) -> r.markDependency(id), StandaloneModel::of);
+        }
+        TurtleOverlayManager.loader().register(register, models.turtleOverlays());
+        TurtleUpgradeModelManager.loader().register(register, models.turtleUpgrades());
+    }
+
+    public static void registerItemModels(BiConsumer<ResourceLocation, MapCodec<? extends ItemModel.Unbaked>> register) {
+        register.accept(TurtleOverlayModel.ID, TurtleOverlayModel.CODEC);
+        register.accept(dan200.computercraft.client.item.model.TurtleUpgradeModel.ID, dan200.computercraft.client.item.model.TurtleUpgradeModel.CODEC);
+    }
+
+    public static void registerItemColours(BiConsumer<ResourceLocation, MapCodec<? extends ItemTintSource>> register) {
+        register.accept(PocketComputerLight.ID, PocketComputerLight.CODEC);
+    }
+
+    public static void registerSelectItemProperties(BiConsumer<ResourceLocation, SelectItemModelProperty.Type<?, ?>> register) {
+        register.accept(PocketComputerStateProperty.ID, PocketComputerStateProperty.TYPE);
+    }
+
+    public static void registerConditionalItemProperties(BiConsumer<ResourceLocation, MapCodec<? extends ConditionalItemModelProperty>> register) {
+        register.accept(TurtleShowElfOverlay.ID, TurtleShowElfOverlay.CODEC);
+    }
+
+    public static void registerLayerDefinitions(BiConsumer<ModelLayerLocation, Supplier<LayerDefinition>> register) {
+        register.accept(LecternBookModel.LAYER, LecternBookModel::createLayer);
+        register.accept(LecternPrintoutModel.LAYER, LecternPrintoutModel::createLayer);
+        register.accept(LecternPocketModel.LAYER, LecternPocketModel::createLayer);
+    }
+
+    public interface RegisterPictureInPictureRenderer {
+        <T extends PictureInPictureRenderState> void register(Class<T> state, Function<MultiBufferSource.BufferSource, PictureInPictureRenderer<T>> factory);
+    }
+
+    public static void registerPictureInPictureRenderers(RegisterPictureInPictureRenderer register) {
+        register.register(PrintoutScreen.PrintoutRenderState.class, PrintoutScreen.PrintoutPictureRenderer::new);
+    }
+
+    public static void registerDebugScreenEntries(BiConsumer<ResourceLocation, DebugScreenEntry> register) {
+        register.accept(LookingAtBlockEntityDebugEntry.ID, LookingAtBlockEntityDebugEntry.create());
     }
 }

projects/common/src/client/java/dan200/computercraft/client/CustomModelManager.java

@@ -0,0 +1,95 @@
+// SPDX-FileCopyrightText: 2025 The CC: Tweaked Developers
+//
+// SPDX-License-Identifier: MPL-2.0
+
+package dan200.computercraft.client;
+
+import com.mojang.serialization.Codec;
+import com.mojang.serialization.JsonOps;
+import dan200.computercraft.client.platform.ClientPlatformHelper;
+import dan200.computercraft.client.platform.ModelKey;
+import dan200.computercraft.shared.util.ResourceUtils;
+import net.minecraft.client.resources.model.ModelBaker;
+import net.minecraft.client.resources.model.ModelManager;
+import net.minecraft.client.resources.model.ResolvableModel;
+import net.minecraft.resources.FileToIdConverter;
+import net.minecraft.resources.ResourceLocation;
+import net.minecraft.server.packs.resources.ResourceManager;
+
+import java.util.Map;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.Executor;
+import java.util.function.BiFunction;
+
+/**
+ * A manager for loading custom models. This is responsible for {@linkplain #load(ResourceManager, Executor) loading
+ * models from resource packs}, {@linkplain #register(ClientRegistry.RegisterExtraModels, Map) registering them as
+ * extra models}, and then {@linkplain #get(ModelManager, ResourceLocation) looking them up}.
+ *
+ * @param <U> The type of unbaked model.
+ * @param <T> The type of baked model.
+ */
+public class CustomModelManager<U extends ResolvableModel, T> {
+    private final String kind;
+    private final FileToIdConverter lister;
+    private final Codec<U> codec;
+    private final BiFunction<U, ModelBaker, T> bake;
+
+    private final ModelKey<T> missingModelKey;
+    private final U missingModel;
+
+    private final Map<ResourceLocation, ModelKey<T>> modelKeys = new ConcurrentHashMap<>();
+
+    public CustomModelManager(String kind, FileToIdConverter lister, Codec<U> codec, BiFunction<U, ModelBaker, T> bake, U missingModel) {
+        this.kind = kind;
+        this.lister = lister;
+        this.codec = codec;
+        this.bake = bake;
+
+        this.missingModelKey = ClientPlatformHelper.get().createModelKey(() -> "Missing " + kind);
+        this.missingModel = missingModel;
+    }
+
+    private ModelKey<T> getModelKey(ResourceLocation id) {
+        return modelKeys.computeIfAbsent(id, o -> ClientPlatformHelper.get().createModelKey(() -> kind + " " + o));
+    }
+
+    /**
+     * Load our models from resources.
+     *
+     * @param resources The current resource manager.
+     * @param executor  The executor to schedule work on.
+     * @return The map of unbaked models.
+     */
+    public CompletableFuture<Map<ResourceLocation, U>> load(ResourceManager resources, Executor executor) {
+        return ResourceUtils.load(resources, executor, kind, lister, JsonOps.INSTANCE, codec);
+    }
+
+    /**
+     * Register our unbaked models.
+     *
+     * @param register The callback to register models with.
+     * @param models   The models to register.
+     */
+    public void register(ClientRegistry.RegisterExtraModels register, Map<ResourceLocation, U> models) {
+        models.forEach((id, model) -> register.register(getModelKey(id), model, bake));
+        register.register(missingModelKey, missingModel, bake);
+    }
+
+    /**
+     * Find the model with the given id. If the model does not exist, then the missing model is returned instead.
+     *
+     * @param modelManager The model manager.
+     * @param id           The model id.
+     * @return The loaded model.
+     */
+    public T get(ModelManager modelManager, ResourceLocation id) {
+        var model = getModelKey(id).get(modelManager);
+        if (model != null) return model;
+
+        var missing = missingModelKey.get(modelManager);
+        if (missing == null) throw new IllegalStateException("Models have not yet been loaded.");
+        return missing;
+    }
+}

projects/common/src/client/java/dan200/computercraft/client/gui/AbstractComputerScreen.java

@@ -23,6 +23,8 @@ import net.minecraft.client.Minecraft;
 import net.minecraft.client.gui.GuiGraphics;
 import net.minecraft.client.gui.components.events.GuiEventListener;
 import net.minecraft.client.gui.screens.inventory.AbstractContainerScreen;
+import net.minecraft.client.input.KeyEvent;
+import net.minecraft.client.input.MouseButtonEvent;
 import net.minecraft.network.chat.Component;
 import net.minecraft.world.entity.player.Inventory;
 import net.minecraft.world.item.ItemStack;
@@ -99,30 +101,39 @@ public abstract class AbstractComputerScreen<T extends AbstractComputerMenu> ext
 
         if (uploadNagDeadline != Long.MAX_VALUE && Util.getNanos() >= uploadNagDeadline) {
             new ItemToast(minecraft(), displayStack, NO_RESPONSE_TITLE, NO_RESPONSE_MSG, ItemToast.TRANSFER_NO_RESPONSE_TOKEN)
-                .showOrReplace(minecraft().getToasts());
+                .showOrReplace(minecraft().getToastManager());
             uploadNagDeadline = Long.MAX_VALUE;
         }
     }
 
     @Override
-    public boolean keyPressed(int key, int scancode, int modifiers) {
+    public boolean keyPressed(KeyEvent event) {
         // Forward the tab key to the terminal, rather than moving between controls.
-        if (key == GLFW.GLFW_KEY_TAB && getFocused() != null && getFocused() == terminal) {
-            return getFocused().keyPressed(key, scancode, modifiers);
+        if (event.key() == GLFW.GLFW_KEY_TAB && getFocused() != null && getFocused() == terminal) {
+            return getFocused().keyPressed(event);
         }
 
-        return super.keyPressed(key, scancode, modifiers);
+        return super.keyPressed(event);
     }
 
     @Override
-    public boolean mouseReleased(double x, double y, int button) {
+    public boolean mouseReleased(MouseButtonEvent event) {
         // Reimplement ContainerEventHandler.mouseReleased, as it's not called in vanilla (it is in Forge, but that
         // shouldn't matter).
         setDragging(false);
-        var child = getChildAt(x, y);
-        if (child.isPresent() && child.get().mouseReleased(x, y, button)) return true;
+        var child = getChildAt(event.x(), event.y());
+        if (child.isPresent() && child.get().mouseReleased(event)) return true;
 
-        return super.mouseReleased(x, y, button);
+        return super.mouseReleased(event);
+    }
+
+    @Override
+    public boolean mouseScrolled(double mouseX, double mouseY, double scrollX, double scrollY) {
+        // Reimplement ContainerEventHandler.mouseScrolled, as AbstractContainerScreen overrides it.
+        var child = getChildAt(mouseX, mouseY);
+        if (child.isPresent() && child.get().mouseScrolled(mouseX, mouseY, scrollX, scrollY)) return true;
+
+        return super.mouseScrolled(mouseX, mouseY, scrollX, scrollY);
     }
 
     @Override
@@ -132,8 +143,8 @@ public abstract class AbstractComputerScreen<T extends AbstractComputerMenu> ext
     }
 
     @Override
-    public boolean mouseClicked(double x, double y, int button) {
-        var changed = super.mouseClicked(x, y, button);
+    public boolean mouseClicked(MouseButtonEvent event, boolean doubleClick) {
+        var changed = super.mouseClicked(event, doubleClick);
         // Clicking the terminate/shutdown button steals focus, which means then pressing "enter" will click the button
         // again. Restore the focus to the terminal in these cases.
         if (getFocused() instanceof DynamicImageButton) setFocused(terminal);
@@ -141,9 +152,9 @@ public abstract class AbstractComputerScreen<T extends AbstractComputerMenu> ext
     }
 
     @Override
-    public boolean mouseDragged(double x, double y, int button, double deltaX, double deltaY) {
-        return (getFocused() != null && getFocused().mouseDragged(x, y, button, deltaX, deltaY))
-            || super.mouseDragged(x, y, button, deltaX, deltaY);
+    public boolean mouseDragged(MouseButtonEvent event, double deltaX, double deltaY) {
+        return (getFocused() != null && getFocused().mouseDragged(event, deltaX, deltaY))
+            || super.mouseDragged(event, deltaX, deltaY);
     }
 
     @Override

projects/common/src/client/java/dan200/computercraft/client/gui/ComputerScreen.java

@@ -6,11 +6,10 @@ package dan200.computercraft.client.gui;
 
 import dan200.computercraft.client.gui.widgets.ComputerSidebar;
 import dan200.computercraft.client.gui.widgets.TerminalWidget;
-import dan200.computercraft.client.render.ComputerBorderRenderer;
-import dan200.computercraft.client.render.RenderTypes;
-import dan200.computercraft.client.render.SpriteRenderer;
+import dan200.computercraft.core.util.Nullability;
 import dan200.computercraft.shared.computer.inventory.AbstractComputerMenu;
 import net.minecraft.client.gui.GuiGraphics;
+import net.minecraft.client.renderer.RenderPipelines;
 import net.minecraft.network.chat.Component;
 import net.minecraft.world.entity.player.Inventory;
 
@@ -40,14 +39,16 @@ public final class ComputerScreen<T extends AbstractComputerMenu> extends Abstra
     public void renderBg(GuiGraphics graphics, float partialTicks, int mouseX, int mouseY) {
         // Draw a border around the terminal
         var terminal = getTerminal();
-        var spriteRenderer = SpriteRenderer.createForGui(graphics, RenderTypes.GUI_SPRITES);
         var computerTextures = GuiSprites.getComputerTextures(family);
 
-        ComputerBorderRenderer.render(
-            spriteRenderer, computerTextures,
-            terminal.getX(), terminal.getY(), terminal.getWidth(), terminal.getHeight(), false
+        graphics.blitSprite(
+            RenderPipelines.GUI_TEXTURED, computerTextures.border(),
+            terminal.getX() - BORDER, terminal.getY() - BORDER, terminal.getWidth() + BORDER * 2, terminal.getHeight() + BORDER * 2
+        );
+
+        graphics.blitSprite(
+            RenderPipelines.GUI_TEXTURED, Nullability.assertNonNull(computerTextures.sidebar()),
+            leftPos, topPos + sidebarYOffset, AbstractComputerMenu.SIDEBAR_WIDTH, ComputerSidebar.HEIGHT
         );
-        ComputerSidebar.renderBackground(spriteRenderer, computerTextures, leftPos, topPos + sidebarYOffset);
-        graphics.flush(); // Flush to ensure background textures are drawn before foreground.
     }
 }

projects/common/src/client/java/dan200/computercraft/client/gui/DiskDriveScreen.java

@@ -7,6 +7,7 @@ package dan200.computercraft.client.gui;
 import dan200.computercraft.shared.peripheral.diskdrive.DiskDriveMenu;
 import net.minecraft.client.gui.GuiGraphics;
 import net.minecraft.client.gui.screens.inventory.AbstractContainerScreen;
+import net.minecraft.client.renderer.RenderPipelines;
 import net.minecraft.network.chat.Component;
 import net.minecraft.resources.ResourceLocation;
 import net.minecraft.world.entity.player.Inventory;
@@ -23,7 +24,7 @@ public class DiskDriveScreen extends AbstractContainerScreen<DiskDriveMenu> {
 
     @Override
     protected void renderBg(GuiGraphics graphics, float partialTicks, int mouseX, int mouseY) {
-        graphics.blit(BACKGROUND, leftPos, topPos, 0, 0, imageWidth, imageHeight);
+        graphics.blit(RenderPipelines.GUI_TEXTURED, BACKGROUND, leftPos, topPos, 0, 0, imageWidth, imageHeight, 256, 256);
     }
 
     @Override

projects/common/src/client/java/dan200/computercraft/client/gui/GuiSprites.java

@@ -7,9 +7,6 @@ package dan200.computercraft.client.gui;
 import dan200.computercraft.api.ComputerCraftAPI;
 import dan200.computercraft.client.render.ComputerBorderRenderer;
 import dan200.computercraft.shared.computer.core.ComputerFamily;
-import net.minecraft.client.renderer.texture.TextureAtlasSprite;
-import net.minecraft.client.renderer.texture.TextureManager;
-import net.minecraft.client.resources.TextureAtlasHolder;
 import net.minecraft.resources.ResourceLocation;
 import org.jspecify.annotations.Nullable;
 
@@ -19,10 +16,7 @@ import java.util.stream.Stream;
 /**
  * Sprite sheet for all GUI texutres in the mod.
  */
-public final class GuiSprites extends TextureAtlasHolder {
-    public static final ResourceLocation SPRITE_SHEET = ResourceLocation.fromNamespaceAndPath(ComputerCraftAPI.MOD_ID, "gui");
-    public static final ResourceLocation TEXTURE = SPRITE_SHEET.withPath(x -> "textures/atlas/" + x + ".png");
-
+public final class GuiSprites {
     public static final ButtonTextures TURNED_OFF = button("turned_off");
     public static final ButtonTextures TURNED_ON = button("turned_on");
     public static final ButtonTextures TERMINATE = button("terminate");
@@ -32,6 +26,9 @@ public final class GuiSprites extends TextureAtlasHolder {
     public static final ComputerTextures COMPUTER_COMMAND = computer("command", false, true);
     public static final ComputerTextures COMPUTER_COLOUR = computer("colour", true, false);
 
+    private GuiSprites() {
+    }
+
     private static ButtonTextures button(String name) {
         return new ButtonTextures(
             ResourceLocation.fromNamespaceAndPath(ComputerCraftAPI.MOD_ID, "buttons/" + name),
@@ -47,34 +44,6 @@ public final class GuiSprites extends TextureAtlasHolder {
         );
     }
 
-    private static @Nullable GuiSprites instance;
-
-    private GuiSprites(TextureManager textureManager) {
-        super(textureManager, TEXTURE, SPRITE_SHEET);
-    }
-
-    /**
-     * Initialise the singleton {@link GuiSprites} instance.
-     *
-     * @param textureManager The current texture manager.
-     * @return The singleton {@link GuiSprites} instance, to register as resource reload listener.
-     */
-    public static GuiSprites initialise(TextureManager textureManager) {
-        if (instance != null) throw new IllegalStateException("GuiSprites has already been initialised");
-        return instance = new GuiSprites(textureManager);
-    }
-
-    /**
-     * Lookup a texture on the atlas.
-     *
-     * @param texture The texture to find.
-     * @return The sprite on the atlas.
-     */
-    public static TextureAtlasSprite get(ResourceLocation texture) {
-        if (instance == null) throw new IllegalStateException("GuiSprites has not been initialised");
-        return instance.getSprite(texture);
-    }
-
     /**
      * Get the appropriate textures to use for a particular computer family.
      *

projects/common/src/client/java/dan200/computercraft/client/gui/ItemToast.java

@@ -5,9 +5,11 @@
 package dan200.computercraft.client.gui;
 
 import net.minecraft.client.Minecraft;
+import net.minecraft.client.gui.Font;
 import net.minecraft.client.gui.GuiGraphics;
 import net.minecraft.client.gui.components.toasts.Toast;
-import net.minecraft.client.gui.components.toasts.ToastComponent;
+import net.minecraft.client.gui.components.toasts.ToastManager;
+import net.minecraft.client.renderer.RenderPipelines;
 import net.minecraft.network.chat.Component;
 import net.minecraft.resources.ResourceLocation;
 import net.minecraft.util.FormattedCharSequence;
@@ -35,8 +37,9 @@ public class ItemToast implements Toast {
     private final Object token;
     private final int width;
 
-    private boolean isNew = true;
-    private long firstDisplay;
+    private boolean changed = true;
+    private long lastChanged;
+    private Visibility visibility = Visibility.HIDE;
 
     public ItemToast(Minecraft minecraft, ItemStack stack, Component title, Component message, Object token) {
         this.stack = stack;
@@ -48,10 +51,10 @@ public class ItemToast implements Toast {
         width = Math.max(MAX_LINE_SIZE, this.message.stream().mapToInt(font::width).max().orElse(MAX_LINE_SIZE)) + MARGIN * 3 + IMAGE_SIZE;
     }
 
-    public void showOrReplace(ToastComponent toasts) {
+    public void showOrReplace(ToastManager toasts) {
         var existing = toasts.getToast(ItemToast.class, getToken());
         if (existing != null) {
-            existing.isNew = true;
+            existing.changed = true;
         } else {
             toasts.addToast(this);
         }
@@ -73,28 +76,22 @@ public class ItemToast implements Toast {
     }
 
     @Override
-    public Visibility render(GuiGraphics graphics, ToastComponent component, long time) {
-        if (isNew) {
+    public Visibility getWantedVisibility() {
+        return visibility;
+    }
 
-            firstDisplay = time;
-            isNew = false;
+    @Override
+    public void update(ToastManager toastManager, long time) {
+        if (changed) {
+            lastChanged = time;
+            changed = false;
         }
+        visibility = time - lastChanged < DISPLAY_TIME * toastManager.getNotificationDisplayTimeMultiplier() ? Visibility.SHOW : Visibility.HIDE;
+    }
 
-        if (width == 160 && message.size() <= 1) {
-            graphics.blitSprite(TEXTURE, 0, 0, width, height());
-        } else {
-
-            var height = height();
-
-            var bottom = Math.min(4, height - 28);
-            renderBackgroundRow(graphics, width, 0, 0, 28);
-
-            for (var i = 28; i < height - bottom; i += 10) {
-                renderBackgroundRow(graphics, width, 16, i, Math.min(16, height - i - bottom));
-            }
-
-            renderBackgroundRow(graphics, width, 32 - bottom, height - bottom, bottom);
-        }
+    @Override
+    public void render(GuiGraphics graphics, Font font, long time) {
+        graphics.blitSprite(RenderPipelines.GUI_TEXTURED, TEXTURE, 0, 0, width(), height());
 
         var textX = MARGIN;
         if (!stack.isEmpty()) {
@@ -102,23 +99,9 @@ public class ItemToast implements Toast {
             graphics.renderFakeItem(stack, MARGIN, MARGIN + height() / 2 - IMAGE_SIZE);
         }
 
-        graphics.drawString(component.getMinecraft().font, title, textX, MARGIN, 0xff500050, false);
+        graphics.drawString(font, title, textX, MARGIN, 0xff500050, false);
         for (var i = 0; i < message.size(); ++i) {
-            graphics.drawString(component.getMinecraft().font, message.get(i), textX, LINE_SPACING + (i + 1) * LINE_SPACING, 0xff000000, false);
+            graphics.drawString(font, message.get(i), textX, LINE_SPACING + (i + 1) * LINE_SPACING, 0xff000000, false);
         }
-
-        return time - firstDisplay < DISPLAY_TIME ? Visibility.SHOW : Visibility.HIDE;
-    }
-
-    private static void renderBackgroundRow(GuiGraphics graphics, int x, int u, int y, int height) {
-        var leftOffset = u == 0 ? 20 : 5;
-        var rightOffset = Math.min(60, x - leftOffset);
-
-        graphics.blitSprite(TEXTURE, 160, 32, 0, u, 0, y, leftOffset, height);
-        for (var k = leftOffset; k < x - rightOffset; k += 64) {
-            graphics.blitSprite(TEXTURE, 160, 32, 32, u, k, y, Math.min(64, x - k - rightOffset), height);
-        }
-
-        graphics.blitSprite(TEXTURE, 160, 32, 160 - rightOffset, u, x - rightOffset, y, rightOffset, height);
     }
 }

projects/common/src/client/java/dan200/computercraft/client/gui/KeyConverter.java

@@ -0,0 +1,40 @@
+// SPDX-FileCopyrightText: 2025 The CC: Tweaked Developers
+//
+// SPDX-License-Identifier: MPL-2.0
+
+package dan200.computercraft.client.gui;
+
+import org.lwjgl.glfw.GLFW;
+
+/**
+ * Supports for converting/translating key codes.
+ */
+public class KeyConverter {
+    /**
+     * GLFW's key events refer to the physical key code, rather than the "actual" key code (with keyboard layout
+     * applied).
+     * <p>
+     * This makes sense for WASD-style input, but is a right pain for keyboard shortcuts — this function attempts to
+     * translate those keys back to their "actual" key code. See also
+     * <a href="https://github.com/glfw/glfw/issues/1502"> this discussion on GLFW's GitHub.</a>
+     *
+     * @param key      The current key code.
+     * @param scanCode The current scan code.
+     * @return The translated key code.
+     */
+    public static int physicalToActual(int key, int scanCode) {
+        var name = GLFW.glfwGetKeyName(key, scanCode);
+        if (name == null || name.length() != 1) return key;
+
+        // If we've got a single character as the key name, treat that as the ASCII value of the key,
+        // and map that back to a key code.
+        var character = name.charAt(0);
+
+        // 0-9 and A-Z map directly to their GLFW key (they're the same ASCII code).
+        if ((character >= '0' && character <= '9') || (character >= 'A' && character <= 'Z')) return character;
+        // a-z map to GLFW_KEY_{A,Z}
+        if (character >= 'a' && character <= 'z') return GLFW.GLFW_KEY_A + (character - 'a');
+
+        return key;
+    }
+}

projects/common/src/client/java/dan200/computercraft/client/gui/LookingAtBlockEntityDebugEntry.java

@@ -0,0 +1,96 @@
+// SPDX-FileCopyrightText: 2025 The CC: Tweaked Developers
+//
+// SPDX-License-Identifier: MPL-2.0
+
+package dan200.computercraft.client.gui;
+
+import dan200.computercraft.api.ComputerCraftAPI;
+import dan200.computercraft.api.turtle.TurtleSide;
+import dan200.computercraft.shared.ModRegistry;
+import dan200.computercraft.shared.peripheral.monitor.MonitorBlockEntity;
+import dan200.computercraft.shared.turtle.blocks.TurtleBlockEntity;
+import net.minecraft.SharedConstants;
+import net.minecraft.client.Minecraft;
+import net.minecraft.client.gui.components.debug.DebugEntryLookingAtBlock;
+import net.minecraft.client.gui.components.debug.DebugScreenDisplayer;
+import net.minecraft.client.gui.components.debug.DebugScreenEntry;
+import net.minecraft.resources.ResourceLocation;
+import net.minecraft.world.level.Level;
+import net.minecraft.world.level.block.entity.BlockEntity;
+import net.minecraft.world.level.block.entity.BlockEntityType;
+import net.minecraft.world.level.chunk.LevelChunk;
+import net.minecraft.world.phys.BlockHitResult;
+import net.minecraft.world.phys.HitResult;
+import org.jspecify.annotations.Nullable;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.function.BiConsumer;
+
+/**
+ * A {@link DebugScreenEntry} that provides information about the currently looked at block entity.
+ *
+ * @see DebugEntryLookingAtBlock
+ */
+public final class LookingAtBlockEntityDebugEntry implements DebugScreenEntry {
+    public static final ResourceLocation ID = ResourceLocation.fromNamespaceAndPath(ComputerCraftAPI.MOD_ID, "looking_at_block_entity");
+
+    private final Map<BlockEntityType<?>, BiConsumer<List<String>, BlockEntity>> blockEntityEmitters = new HashMap<>();
+
+    private LookingAtBlockEntityDebugEntry() {
+    }
+
+    @Override
+    public void display(DebugScreenDisplayer displayer, @Nullable Level level, @Nullable LevelChunk clientChunk, @Nullable LevelChunk serverChunk) {
+        var entity = Minecraft.getInstance().getCameraEntity();
+        var trueLevel = SharedConstants.DEBUG_SHOW_SERVER_DEBUG_VALUES ? level : Minecraft.getInstance().level;
+        if (entity == null || trueLevel == null) return;
+
+        var hitResult = entity.pick(20.0, 0.0F, false);
+        if (hitResult.getType() != HitResult.Type.BLOCK) return;
+
+        var blockEntity = trueLevel.getBlockEntity(((BlockHitResult) hitResult).getBlockPos());
+        if (blockEntity == null) return;
+        var emitter = blockEntityEmitters.get(blockEntity.getType());
+        if (emitter == null) return;
+
+        List<String> lines = new ArrayList<>();
+        emitter.accept(lines, blockEntity);
+        displayer.addToGroup(ID, lines);
+    }
+
+    @SuppressWarnings("unchecked")
+    private <T extends BlockEntity> LookingAtBlockEntityDebugEntry register(BlockEntityType<T> type, BiConsumer<List<String>, T> emit) {
+        blockEntityEmitters.put(type, (BiConsumer<List<String>, BlockEntity>) emit);
+        return this;
+    }
+
+    public static DebugScreenEntry create() {
+        return new LookingAtBlockEntityDebugEntry()
+            .register(ModRegistry.BlockEntities.MONITOR_NORMAL.get(), LookingAtBlockEntityDebugEntry::debugMonitor)
+            .register(ModRegistry.BlockEntities.MONITOR_ADVANCED.get(), LookingAtBlockEntityDebugEntry::debugMonitor)
+            .register(ModRegistry.BlockEntities.TURTLE_NORMAL.get(), LookingAtBlockEntityDebugEntry::debugTurtle)
+            .register(ModRegistry.BlockEntities.TURTLE_ADVANCED.get(), LookingAtBlockEntityDebugEntry::debugTurtle);
+    }
+
+    private static void debugMonitor(List<String> lines, MonitorBlockEntity monitor) {
+        lines.add(
+            String.format("Targeted monitor: (%d, %d), %d x %d", monitor.getXIndex(), monitor.getYIndex(), monitor.getWidth(), monitor.getHeight())
+        );
+    }
+
+    private static void debugTurtle(List<String> lines, TurtleBlockEntity turtle) {
+        lines.add("Targeted turtle:");
+        lines.add(String.format("Id: %d", turtle.getComputerID()));
+        addTurtleUpgrade(lines, turtle, TurtleSide.LEFT);
+        addTurtleUpgrade(lines, turtle, TurtleSide.RIGHT);
+    }
+
+    private static void addTurtleUpgrade(List<String> out, TurtleBlockEntity turtle, TurtleSide side) {
+        var upgrade = turtle.getAccess().getUpgradeWithData(side);
+        if (upgrade != null) out.add(String.format("Upgrade[%s]: %s", side, upgrade.holder().key().location()));
+    }
+
+}

projects/common/src/client/java/dan200/computercraft/client/gui/NoTermComputerScreen.java

@@ -10,9 +10,11 @@ import dan200.computercraft.core.util.Nullability;
 import dan200.computercraft.shared.computer.inventory.AbstractComputerMenu;
 import net.minecraft.client.KeyMapping;
 import net.minecraft.client.Minecraft;
+import net.minecraft.client.ScrollWheelHandler;
 import net.minecraft.client.gui.GuiGraphics;
 import net.minecraft.client.gui.screens.Screen;
 import net.minecraft.client.gui.screens.inventory.MenuAccess;
+import net.minecraft.client.input.KeyEvent;
 import net.minecraft.network.chat.Component;
 import net.minecraft.world.entity.player.Inventory;
 import org.jspecify.annotations.Nullable;
@@ -32,6 +34,8 @@ public class NoTermComputerScreen<T extends AbstractComputerMenu> extends Screen
     private final Terminal terminalData;
     private @Nullable TerminalWidget terminal;
 
+    private final ScrollWheelHandler scrollHandler = new ScrollWheelHandler();
+
     public NoTermComputerScreen(T menu, Inventory player, Component title) {
         super(title);
         this.menu = menu;
@@ -67,7 +71,12 @@ public class NoTermComputerScreen<T extends AbstractComputerMenu> extends Screen
 
     @Override
     public boolean mouseScrolled(double mouseX, double mouseY, double scrollX, double scrollY) {
-        Objects.requireNonNull(minecraft().player).getInventory().swapPaint(scrollY);
+        var direction = scrollHandler.onMouseScroll(scrollX, scrollY);
+        var inventory = Objects.requireNonNull(minecraft().player).getInventory();
+        inventory.setSelectedSlot(ScrollWheelHandler.getNextScrollWheelSelection(
+            direction.y == 0 ? -direction.x : direction.y, inventory.getSelectedSlot(), Inventory.getSelectionSize()
+        ));
+
         return super.mouseScrolled(mouseX, mouseY, scrollX, scrollY);
     }
 
@@ -83,13 +92,13 @@ public class NoTermComputerScreen<T extends AbstractComputerMenu> extends Screen
     }
 
     @Override
-    public final boolean keyPressed(int key, int scancode, int modifiers) {
+    public final boolean keyPressed(KeyEvent event) {
         // Forward the tab key to the terminal, rather than moving between controls.
-        if (key == GLFW.GLFW_KEY_TAB && getFocused() != null && getFocused() == terminal) {
-            return getFocused().keyPressed(key, scancode, modifiers);
+        if (event.key() == GLFW.GLFW_KEY_TAB && getFocused() != null && getFocused() == terminal) {
+            return getFocused().keyPressed(event);
         }
 
-        return super.keyPressed(key, scancode, modifiers);
+        return super.keyPressed(event);
     }
 
     @Override
@@ -100,7 +109,7 @@ public class NoTermComputerScreen<T extends AbstractComputerMenu> extends Screen
         var lines = font.split(Component.translatable("gui.computercraft.pocket_computer_overlay"), (int) (width * 0.8));
         var y = 10;
         for (var line : lines) {
-            graphics.drawString(font, line, (width / 2) - (font.width(line) / 2), y, 0xFFFFFF, true);
+            graphics.drawString(font, line, (width / 2) - (font.width(line) / 2), y, 0xFFFFFFFF, true);
             y += 9;
         }
     }

projects/common/src/client/java/dan200/computercraft/client/gui/OptionScreen.java

@@ -10,6 +10,7 @@ import net.minecraft.client.gui.components.AbstractWidget;
 import net.minecraft.client.gui.components.Button;
 import net.minecraft.client.gui.components.MultiLineLabel;
 import net.minecraft.client.gui.screens.Screen;
+import net.minecraft.client.renderer.RenderPipelines;
 import net.minecraft.network.chat.Component;
 import net.minecraft.resources.ResourceLocation;
 import org.jspecify.annotations.Nullable;
@@ -87,14 +88,15 @@ public final class OptionScreen extends Screen {
     @Override
     public void render(GuiGraphics graphics, int mouseX, int mouseY, float partialTicks) {
         // Render the actual texture.
-        graphics.blit(BACKGROUND, x, y, 0, 0, innerWidth, PADDING);
-        graphics.blit(BACKGROUND,
+        graphics.blit(RenderPipelines.GUI_TEXTURED, BACKGROUND, x, y, 0, 0, innerWidth, PADDING, 256, 256);
+        graphics.blit(RenderPipelines.GUI_TEXTURED, BACKGROUND,
             x, y + PADDING, 0, PADDING, innerWidth, innerHeight - PADDING * 2,
-            innerWidth, PADDING
+            innerWidth, PADDING,
+            256, 256
         );
-        graphics.blit(BACKGROUND, x, y + innerHeight - PADDING, 0, 256 - PADDING, innerWidth, PADDING);
+        graphics.blit(RenderPipelines.GUI_TEXTURED, BACKGROUND, x, y + innerHeight - PADDING, 0, 256 - PADDING, innerWidth, PADDING, 256, 256);
 
-        assertNonNull(messageRenderer).renderLeftAlignedNoShadow(graphics, x + PADDING, y + PADDING, FONT_HEIGHT, 0x404040);
+        assertNonNull(messageRenderer).render(graphics, MultiLineLabel.Align.LEFT, +PADDING, y + PADDING, FONT_HEIGHT, false, 0x404040);
         super.render(graphics, mouseX, mouseY, partialTicks);
     }
 

projects/common/src/client/java/dan200/computercraft/client/gui/PrinterScreen.java

@@ -7,6 +7,7 @@ package dan200.computercraft.client.gui;
 import dan200.computercraft.shared.peripheral.printer.PrinterMenu;
 import net.minecraft.client.gui.GuiGraphics;
 import net.minecraft.client.gui.screens.inventory.AbstractContainerScreen;
+import net.minecraft.client.renderer.RenderPipelines;
 import net.minecraft.network.chat.Component;
 import net.minecraft.resources.ResourceLocation;
 import net.minecraft.world.entity.player.Inventory;
@@ -23,9 +24,11 @@ public class PrinterScreen extends AbstractContainerScreen<PrinterMenu> {
 
     @Override
     protected void renderBg(GuiGraphics graphics, float partialTicks, int mouseX, int mouseY) {
-        graphics.blit(BACKGROUND, leftPos, topPos, 0, 0, imageWidth, imageHeight);
+        graphics.blit(RenderPipelines.GUI_TEXTURED, BACKGROUND, leftPos, topPos, 0, 0, imageWidth, imageHeight, 256, 256);
 
-        if (getMenu().isPrinting()) graphics.blit(BACKGROUND, leftPos + 34, topPos + 21, 176, 0, 25, 45);
+        if (getMenu().isPrinting()) {
+            graphics.blit(RenderPipelines.GUI_TEXTURED, BACKGROUND, leftPos + 34, topPos + 21, 176, 0, 25, 45, 256, 256);
+        }
     }
 
     @Override

projects/common/src/client/java/dan200/computercraft/client/gui/PrintoutScreen.java

@@ -4,28 +4,38 @@
 
 package dan200.computercraft.client.gui;
 
+import com.mojang.blaze3d.vertex.PoseStack;
+import dan200.computercraft.client.render.PrintoutRenderer;
 import dan200.computercraft.core.terminal.TextBuffer;
 import dan200.computercraft.shared.ModRegistry;
 import dan200.computercraft.shared.media.PrintoutMenu;
 import dan200.computercraft.shared.media.items.PrintoutData;
 import net.minecraft.client.gui.GuiGraphics;
+import net.minecraft.client.gui.navigation.ScreenRectangle;
+import net.minecraft.client.gui.render.pip.PictureInPictureRenderer;
+import net.minecraft.client.gui.render.state.GuiElementRenderState;
+import net.minecraft.client.gui.render.state.pip.PictureInPictureRenderState;
 import net.minecraft.client.gui.screens.inventory.AbstractContainerScreen;
+import net.minecraft.client.input.KeyEvent;
+import net.minecraft.client.renderer.LightTexture;
+import net.minecraft.client.renderer.MultiBufferSource;
 import net.minecraft.network.chat.Component;
 import net.minecraft.world.entity.player.Inventory;
 import net.minecraft.world.inventory.AbstractContainerMenu;
 import net.minecraft.world.inventory.ContainerListener;
 import net.minecraft.world.item.ItemStack;
+import org.joml.Matrix3x2f;
+import org.jspecify.annotations.Nullable;
 import org.lwjgl.glfw.GLFW;
 
 import java.util.Objects;
 
 import static dan200.computercraft.client.render.PrintoutRenderer.*;
-import static dan200.computercraft.client.render.RenderTypes.FULL_BRIGHT_LIGHTMAP;
 
 /**
  * The GUI for printed pages and books.
  *
- * @see dan200.computercraft.client.render.PrintoutRenderer
+ * @see PrintoutRenderer
  */
 public final class PrintoutScreen extends AbstractContainerScreen<PrintoutMenu> implements ContainerListener {
     private PrintoutInfo printout = PrintoutInfo.DEFAULT;
@@ -78,18 +88,18 @@ public final class PrintoutScreen extends AbstractContainerScreen<PrintoutMenu>
     }
 
     @Override
-    public boolean keyPressed(int key, int scancode, int modifiers) {
-        if (key == GLFW.GLFW_KEY_RIGHT) {
+    public boolean keyPressed(KeyEvent event) {
+        if (event.key() == GLFW.GLFW_KEY_RIGHT) {
             nextPage();
             return true;
         }
 
-        if (key == GLFW.GLFW_KEY_LEFT) {
+        if (event.key() == GLFW.GLFW_KEY_LEFT) {
             previousPage();
             return true;
         }
 
-        return super.keyPressed(key, scancode, modifiers);
+        return super.keyPressed(event);
     }
 
     @Override
@@ -113,13 +123,11 @@ public final class PrintoutScreen extends AbstractContainerScreen<PrintoutMenu>
     @Override
     protected void renderBg(GuiGraphics graphics, float partialTicks, int mouseX, int mouseY) {
         // Push the printout slightly forward, to avoid clipping into the background.
-        graphics.pose().pushPose();
-        graphics.pose().translate(0, 0, 1);
-
-        drawBorder(graphics.pose(), graphics.bufferSource(), leftPos, topPos, 0, page, printout.pages(), printout.book(), FULL_BRIGHT_LIGHTMAP);
-        drawText(graphics.pose(), graphics.bufferSource(), leftPos + X_TEXT_MARGIN, topPos + Y_TEXT_MARGIN, PrintoutData.LINES_PER_PAGE * page, FULL_BRIGHT_LIGHTMAP, printout.text(), printout.colour());
-
-        graphics.pose().popPose();
+        graphics.guiRenderState.submitPicturesInPictureState(new PrintoutRenderState(
+            leftPos - COVER_SIZE - 32, leftPos + X_SIZE + COVER_SIZE + 32,
+            topPos - COVER_SIZE, topPos + Y_SIZE + COVER_SIZE,
+            printout, page, new Matrix3x2f(graphics.pose()), graphics.scissorStack.peek()
+        ));
     }
 
     @Override
@@ -144,4 +152,58 @@ public final class PrintoutScreen extends AbstractContainerScreen<PrintoutMenu>
             return new PrintoutInfo(pages, book, text, colours);
         }
     }
+
+    public record PrintoutRenderState(
+        int x0, int x1, int y0, int y1, PrintoutInfo printout, int page, Matrix3x2f pose,
+        @Nullable ScreenRectangle scissorArea, @Nullable ScreenRectangle bounds
+    ) implements PictureInPictureRenderState {
+        private PrintoutRenderState(
+            int x0, int x1, int y0, int y1, PrintoutInfo printout, int page, Matrix3x2f pose, @Nullable ScreenRectangle scissorArea
+        ) {
+            this(x0, x1, y0, y1, printout, page, pose, scissorArea, PictureInPictureRenderState.getBounds(x0, x1, y0, y1, scissorArea));
+        }
+
+        @Override
+        public float scale() {
+            return 1.0f;
+        }
+    }
+
+    /**
+     * PIP renderer for printouts.
+     * <p>
+     * We prefer using a PIP (rather than a {@link GuiElementRenderState}), as {@link PrintoutRenderer} renders with
+     * multiple z-levels.
+     */
+    public static final class PrintoutPictureRenderer extends PictureInPictureRenderer<PrintoutRenderState> {
+        public PrintoutPictureRenderer(MultiBufferSource.BufferSource bufferSource) {
+            super(bufferSource);
+        }
+
+        @Override
+        protected void renderToTexture(PrintoutRenderState state, PoseStack pose) {
+            pose.pushPose();
+            pose.translate(-0.5f * X_SIZE, -(Y_SIZE + COVER_SIZE), 0);
+            pose.scale(1.0f, 1.0f, -1.0f);
+
+            var buffer = bufferSource.getBuffer(PrintoutRenderer.BACKGROUND);
+            drawBorder(pose.last().pose(), buffer, 0, 0, 0, state.page(), state.printout().pages(), state.printout().book(), LightTexture.FULL_BRIGHT);
+
+            drawText(
+                pose, bufferSource, X_TEXT_MARGIN, Y_TEXT_MARGIN, PrintoutData.LINES_PER_PAGE * state.page(), LightTexture.FULL_BRIGHT,
+                state.printout().text(), state.printout().colour()
+            );
+            pose.popPose();
+        }
+
+        @Override
+        public Class<PrintoutRenderState> getRenderStateClass() {
+            return PrintoutRenderState.class;
+        }
+
+        @Override
+        protected String getTextureLabel() {
+            return "Printout";
+        }
+    }
 }

projects/common/src/client/java/dan200/computercraft/client/gui/TurtleScreen.java

@@ -7,12 +7,12 @@ package dan200.computercraft.client.gui;
 import dan200.computercraft.api.ComputerCraftAPI;
 import dan200.computercraft.client.gui.widgets.ComputerSidebar;
 import dan200.computercraft.client.gui.widgets.TerminalWidget;
-import dan200.computercraft.client.render.RenderTypes;
-import dan200.computercraft.client.render.SpriteRenderer;
+import dan200.computercraft.core.util.Nullability;
 import dan200.computercraft.shared.computer.core.ComputerFamily;
 import dan200.computercraft.shared.computer.inventory.AbstractComputerMenu;
 import dan200.computercraft.shared.turtle.inventory.TurtleMenu;
 import net.minecraft.client.gui.GuiGraphics;
+import net.minecraft.client.renderer.RenderPipelines;
 import net.minecraft.network.chat.Component;
 import net.minecraft.resources.ResourceLocation;
 import net.minecraft.world.entity.player.Inventory;
@@ -49,8 +49,11 @@ public class TurtleScreen extends AbstractComputerScreen<TurtleMenu> {
     @Override
     protected void renderBg(GuiGraphics graphics, float partialTicks, int mouseX, int mouseY) {
         var advanced = family == ComputerFamily.ADVANCED;
-        var texture = advanced ? BACKGROUND_ADVANCED : BACKGROUND_NORMAL;
-        graphics.blit(texture, leftPos + AbstractComputerMenu.SIDEBAR_WIDTH, topPos, 0, 0, 0, TEX_WIDTH, TEX_HEIGHT, FULL_TEX_SIZE, FULL_TEX_SIZE);
+        graphics.blit(
+            RenderPipelines.GUI_TEXTURED, advanced ? BACKGROUND_ADVANCED : BACKGROUND_NORMAL,
+            leftPos + AbstractComputerMenu.SIDEBAR_WIDTH, topPos, 0, 0,
+            TEX_WIDTH, TEX_HEIGHT, FULL_TEX_SIZE, FULL_TEX_SIZE
+        );
 
         // Render selected slot
         var slot = getMenu().getSelectedSlot();
@@ -58,14 +61,15 @@ public class TurtleScreen extends AbstractComputerScreen<TurtleMenu> {
             var slotX = slot % 4;
             var slotY = slot / 4;
             graphics.blitSprite(
-                advanced ? SELECTED_ADVANCED : SELECTED_NORMAL,
-                leftPos + TURTLE_START_X - 2 + slotX * 18, topPos + PLAYER_START_Y - 2 + slotY * 18, 0, 22, 22
+                RenderPipelines.GUI_TEXTURED, advanced ? SELECTED_ADVANCED : SELECTED_NORMAL,
+                leftPos + TURTLE_START_X - 2 + slotX * 18, topPos + PLAYER_START_Y - 2 + slotY * 18, 22, 22
             );
         }
 
         // Render sidebar
-        var spriteRenderer = SpriteRenderer.createForGui(graphics, RenderTypes.GUI_SPRITES);
-        ComputerSidebar.renderBackground(spriteRenderer, GuiSprites.getComputerTextures(family), leftPos, topPos + sidebarYOffset);
-        graphics.flush(); // Flush to ensure background textures are drawn before foreground.
+        graphics.blitSprite(
+            RenderPipelines.GUI_TEXTURED, Nullability.assertNonNull(GuiSprites.getComputerTextures(family).sidebar()),
+            leftPos, topPos + sidebarYOffset, AbstractComputerMenu.SIDEBAR_WIDTH, ComputerSidebar.HEIGHT
+        );
     }
 }

projects/common/src/client/java/dan200/computercraft/client/gui/widgets/ComputerSidebar.java

@@ -6,9 +6,7 @@ package dan200.computercraft.client.gui.widgets;
 
 import dan200.computercraft.client.gui.GuiSprites;
 import dan200.computercraft.client.gui.widgets.DynamicImageButton.HintedMessage;
-import dan200.computercraft.client.render.SpriteRenderer;
 import dan200.computercraft.shared.computer.core.InputHandler;
-import dan200.computercraft.shared.computer.inventory.AbstractComputerMenu;
 import net.minecraft.client.gui.components.AbstractWidget;
 import net.minecraft.network.chat.Component;
 
@@ -24,12 +22,9 @@ public final class ComputerSidebar {
     private static final int ICON_MARGIN = 2;
 
     private static final int CORNERS_BORDER = 3;
-    private static final int FULL_BORDER = CORNERS_BORDER + ICON_MARGIN;
 
     private static final int BUTTONS = 2;
-    private static final int HEIGHT = (ICON_HEIGHT + ICON_MARGIN * 2) * BUTTONS + CORNERS_BORDER * 2;
-
-    private static final int TEX_HEIGHT = 14;
+    public static final int HEIGHT = (ICON_HEIGHT + ICON_MARGIN * 2) * BUTTONS + CORNERS_BORDER * 2;
 
     private ComputerSidebar() {
     }
@@ -63,14 +58,6 @@ public final class ComputerSidebar {
         ));
     }
 
-    public static void renderBackground(SpriteRenderer renderer, GuiSprites.ComputerTextures textures, int x, int y) {
-        var texture = textures.sidebar();
-        if (texture == null) throw new NullPointerException(textures + " has no sidebar texture");
-        var sprite = GuiSprites.get(texture);
-
-        renderer.blitVerticalSliced(sprite, x, y, AbstractComputerMenu.SIDEBAR_WIDTH, HEIGHT, FULL_BORDER, FULL_BORDER, TEX_HEIGHT);
-    }
-
     private static void toggleComputer(BooleanSupplier isOn, InputHandler input) {
         if (isOn.getAsBoolean()) {
             input.shutdown();

projects/common/src/client/java/dan200/computercraft/client/gui/widgets/DynamicImageButton.java

@@ -4,12 +4,12 @@
 
 package dan200.computercraft.client.gui.widgets;
 
-import com.mojang.blaze3d.systems.RenderSystem;
 import it.unimi.dsi.fastutil.booleans.Boolean2ObjectFunction;
 import net.minecraft.ChatFormatting;
 import net.minecraft.client.gui.GuiGraphics;
 import net.minecraft.client.gui.components.Button;
 import net.minecraft.client.gui.components.Tooltip;
+import net.minecraft.client.renderer.RenderPipelines;
 import net.minecraft.network.chat.Component;
 import net.minecraft.resources.ResourceLocation;
 import org.jspecify.annotations.Nullable;
@@ -48,10 +48,7 @@ public class DynamicImageButton extends Button {
         setTooltip(message.tooltip());
 
         var texture = this.texture.get(isHoveredOrFocused());
-
-        RenderSystem.disableDepthTest();
-        graphics.blitSprite(texture, getX(), getY(), 0, width, height);
-        RenderSystem.enableDepthTest();
+        graphics.blitSprite(RenderPipelines.GUI_TEXTURED, texture, getX(), getY(), width, height);
     }
 
     public record HintedMessage(Component message, Tooltip tooltip) {

projects/common/src/client/java/dan200/computercraft/client/gui/widgets/TerminalWidget.java

@@ -4,7 +4,9 @@
 
 package dan200.computercraft.client.gui.widgets;
 
-import dan200.computercraft.client.render.RenderTypes;
+import com.mojang.blaze3d.pipeline.RenderPipeline;
+import com.mojang.blaze3d.vertex.VertexConsumer;
+import dan200.computercraft.client.gui.KeyConverter;
 import dan200.computercraft.client.render.text.FixedWidthFontRenderer;
 import dan200.computercraft.core.terminal.Terminal;
 import dan200.computercraft.core.util.StringUtil;
@@ -14,8 +16,18 @@ import net.minecraft.client.gui.GuiGraphics;
 import net.minecraft.client.gui.components.AbstractWidget;
 import net.minecraft.client.gui.narration.NarratedElementType;
 import net.minecraft.client.gui.narration.NarrationElementOutput;
-import net.minecraft.client.gui.screens.Screen;
+import net.minecraft.client.gui.navigation.ScreenRectangle;
+import net.minecraft.client.gui.render.TextureSetup;
+import net.minecraft.client.gui.render.state.GuiElementRenderState;
+import net.minecraft.client.input.CharacterEvent;
+import net.minecraft.client.input.KeyEvent;
+import net.minecraft.client.input.MouseButtonEvent;
+import net.minecraft.client.renderer.LightTexture;
+import net.minecraft.client.renderer.RenderPipelines;
 import net.minecraft.network.chat.Component;
+import org.joml.Matrix3x2f;
+import org.joml.Matrix4f;
+import org.jspecify.annotations.Nullable;
 import org.lwjgl.glfw.GLFW;
 
 import java.util.BitSet;
@@ -68,22 +80,22 @@ public class TerminalWidget extends AbstractWidget {
     }
 
     @Override
-    public boolean charTyped(char ch, int modifiers) {
-        var terminalChar = StringUtil.unicodeToTerminal(ch);
+    public boolean charTyped(CharacterEvent event) {
+        var terminalChar = StringUtil.unicodeToTerminal(event.codepoint());
         if (StringUtil.isTypableChar(terminalChar)) computer.charTyped((byte) terminalChar);
         return true;
     }
 
     @Override
-    public boolean keyPressed(int key, int scancode, int modifiers) {
-        if (key == GLFW.GLFW_KEY_ESCAPE) return false;
-        if (Screen.isPaste(key)) {
+    public boolean keyPressed(KeyEvent event) {
+        if (event.key() == GLFW.GLFW_KEY_ESCAPE) return false;
+        if (event.isPaste()) {
             paste();
             return true;
         }
 
-        if ((modifiers & GLFW.GLFW_MOD_CONTROL) != 0) {
-            switch (key) {
+        if ((event.modifiers() & GLFW.GLFW_MOD_CONTROL) != 0) {
+            switch (KeyConverter.physicalToActual(event.key(), event.scancode())) {
                 case GLFW.GLFW_KEY_T -> {
                     if (terminateTimer < 0) terminateTimer = 0;
                 }
@@ -96,11 +108,11 @@ public class TerminalWidget extends AbstractWidget {
             }
         }
 
-        if (key >= 0 && terminateTimer < KEY_SUPPRESS_DELAY && rebootTimer < KEY_SUPPRESS_DELAY && shutdownTimer < KEY_SUPPRESS_DELAY) {
+        if (event.key() >= 0 && terminateTimer < KEY_SUPPRESS_DELAY && rebootTimer < KEY_SUPPRESS_DELAY && shutdownTimer < KEY_SUPPRESS_DELAY) {
             // Queue the "key" event and add to the down set
-            var repeat = keysDown.get(key);
-            keysDown.set(key);
-            computer.keyDown(key, repeat);
+            var repeat = keysDown.get(event.key());
+            keysDown.set(event.key());
+            computer.keyDown(event.key(), repeat);
         }
 
         return true;
@@ -112,14 +124,14 @@ public class TerminalWidget extends AbstractWidget {
     }
 
     @Override
-    public boolean keyReleased(int key, int scancode, int modifiers) {
+    public boolean keyReleased(KeyEvent event) {
         // Queue the "key_up" event and remove from the down set
-        if (key >= 0 && keysDown.get(key)) {
-            keysDown.set(key, false);
-            computer.keyUp(key);
+        if (event.key() >= 0 && keysDown.get(event.key())) {
+            keysDown.set(event.key(), false);
+            computer.keyUp(event.key());
         }
 
-        switch (key) {
+        switch (KeyConverter.physicalToActual(event.key(), event.scancode())) {
             case GLFW.GLFW_KEY_T -> terminateTimer = -1;
             case GLFW.GLFW_KEY_R -> rebootTimer = -1;
             case GLFW.GLFW_KEY_S -> shutdownTimer = -1;
@@ -131,18 +143,18 @@ public class TerminalWidget extends AbstractWidget {
     }
 
     @Override
-    public boolean mouseClicked(double mouseX, double mouseY, int button) {
-        if (!inTermRegion(mouseX, mouseY)) return false;
-        if (!hasMouseSupport() || button < 0 || button > 2) return false;
+    public boolean mouseClicked(MouseButtonEvent event, boolean doubleClick) {
+        if (!inTermRegion(event.x(), event.y())) return false;
+        if (!hasMouseSupport() || event.button() < 0 || event.button() > 2) return false;
 
-        var charX = (int) ((mouseX - innerX) / FONT_WIDTH);
-        var charY = (int) ((mouseY - innerY) / FONT_HEIGHT);
+        var charX = (int) ((event.x() - innerX) / FONT_WIDTH);
+        var charY = (int) ((event.y() - innerY) / FONT_HEIGHT);
         charX = Math.min(Math.max(charX, 0), terminal.getWidth() - 1);
         charY = Math.min(Math.max(charY, 0), terminal.getHeight() - 1);
 
-        computer.mouseClick(button + 1, charX + 1, charY + 1);
+        computer.mouseClick(event.button() + 1, charX + 1, charY + 1);
 
-        lastMouseButton = button;
+        lastMouseButton = event.button();
         lastMouseX = charX;
         lastMouseY = charY;
 
@@ -150,16 +162,16 @@ public class TerminalWidget extends AbstractWidget {
     }
 
     @Override
-    public boolean mouseReleased(double mouseX, double mouseY, int button) {
-        if (!inTermRegion(mouseX, mouseY)) return false;
-        if (!hasMouseSupport() || button < 0 || button > 2) return false;
+    public boolean mouseReleased(MouseButtonEvent event) {
+        if (!inTermRegion(event.x(), event.y())) return false;
+        if (!hasMouseSupport() || event.button() < 0 || event.button() > 2) return false;
 
-        var charX = (int) ((mouseX - innerX) / FONT_WIDTH);
-        var charY = (int) ((mouseY - innerY) / FONT_HEIGHT);
+        var charX = (int) ((event.x() - innerX) / FONT_WIDTH);
+        var charY = (int) ((event.y() - innerY) / FONT_HEIGHT);
         charX = Math.min(Math.max(charX, 0), terminal.getWidth() - 1);
         charY = Math.min(Math.max(charY, 0), terminal.getHeight() - 1);
 
-        if (lastMouseButton == button) {
+        if (lastMouseButton == event.button()) {
             computer.mouseUp(lastMouseButton + 1, charX + 1, charY + 1);
             lastMouseButton = -1;
         }
@@ -171,17 +183,17 @@ public class TerminalWidget extends AbstractWidget {
     }
 
     @Override
-    public boolean mouseDragged(double mouseX, double mouseY, int button, double v2, double v3) {
-        if (!inTermRegion(mouseX, mouseY)) return false;
-        if (!hasMouseSupport() || button < 0 || button > 2) return false;
+    public boolean mouseDragged(MouseButtonEvent event, double v2, double v3) {
+        if (!inTermRegion(event.x(), event.y())) return false;
+        if (!hasMouseSupport() || event.button() < 0 || event.button() > 2) return false;
 
-        var charX = (int) ((mouseX - innerX) / FONT_WIDTH);
-        var charY = (int) ((mouseY - innerY) / FONT_HEIGHT);
+        var charX = (int) ((event.x() - innerX) / FONT_WIDTH);
+        var charY = (int) ((event.y() - innerY) / FONT_HEIGHT);
         charX = Math.min(Math.max(charX, 0), terminal.getWidth() - 1);
         charY = Math.min(Math.max(charY, 0), terminal.getHeight() - 1);
 
-        if (button == lastMouseButton && (charX != lastMouseX || charY != lastMouseY)) {
-            computer.mouseDrag(button + 1, charX + 1, charY + 1);
+        if (event.button() == lastMouseButton && (charX != lastMouseX || charY != lastMouseY)) {
+            computer.mouseDrag(event.button() + 1, charX + 1, charY + 1);
             lastMouseX = charX;
             lastMouseY = charY;
         }
@@ -254,12 +266,23 @@ public class TerminalWidget extends AbstractWidget {
     public void renderWidget(GuiGraphics graphics, int mouseX, int mouseY, float partialTicks) {
         if (!visible) return;
 
-        var emitter = FixedWidthFontRenderer.toVertexConsumer(graphics.pose(), graphics.bufferSource().getBuffer(RenderTypes.TERMINAL));
+        var scissor = graphics.scissorStack.peek();
+        var terminalPose = new Matrix3x2f(graphics.pose());
+        var terminalTextures = TextureSetup.singleTextureWithLightmap(graphics.minecraft.getTextureManager().getTexture(FixedWidthFontRenderer.FONT).getTextureView());
 
-        FixedWidthFontRenderer.drawTerminal(
-            emitter,
-            (float) innerX, (float) innerY, terminal, (float) MARGIN, (float) MARGIN, (float) MARGIN, (float) MARGIN
-        );
+        graphics.guiRenderState.submitGuiElement(new TerminalBackgroundRenderState(
+            innerX, innerY, terminal, terminalPose, terminalTextures,
+            maybeIntersect(scissor, new ScreenRectangle(
+                innerX, innerY, terminal.getWidth() * FONT_WIDTH, terminal.getHeight() * FONT_HEIGHT).transformMaxBounds(graphics.pose())
+            ),
+            scissor
+        ));
+
+        graphics.guiRenderState.submitGuiElement(new TerminalTextRenderState(
+            innerX, innerY, terminal, terminalPose, terminalTextures,
+            maybeIntersect(scissor, new ScreenRectangle(getX(), getY(), getWidth(), getHeight()).transformMaxBounds(graphics.pose())),
+            scissor
+        ));
     }
 
     @Override
@@ -274,4 +297,48 @@ public class TerminalWidget extends AbstractWidget {
     public static int getHeight(int termHeight) {
         return termHeight * FONT_HEIGHT + MARGIN * 2;
     }
+
+    private static @Nullable ScreenRectangle maybeIntersect(@Nullable ScreenRectangle scissor, ScreenRectangle bounds) {
+        return scissor == null ? bounds : bounds.intersection(scissor);
+    }
+
+    private record TerminalBackgroundRenderState(
+        int x, int y, Terminal terminal,
+        Matrix3x2f pose,
+        TextureSetup textureSetup,
+        @Nullable ScreenRectangle bounds,
+        @Nullable ScreenRectangle scissorArea
+    ) implements GuiElementRenderState {
+        @Override
+        public void buildVertices(VertexConsumer buffer) {
+            FixedWidthFontRenderer.drawTerminalBackground(new Matrix4f().mul(pose), buffer, x, y, terminal, MARGIN, MARGIN, MARGIN, MARGIN);
+        }
+
+        @Override
+        public RenderPipeline pipeline() {
+            return RenderPipelines.TEXT;
+        }
+    }
+
+    private record TerminalTextRenderState(
+        int x, int y, Terminal terminal, Matrix3x2f pose, TextureSetup textureSetup,
+        @Nullable ScreenRectangle bounds, @Nullable ScreenRectangle scissorArea
+    ) implements GuiElementRenderState {
+        @Override
+        public void buildVertices(VertexConsumer buffer) {
+            var transform = new Matrix4f().mul(pose);
+            FixedWidthFontRenderer.drawTerminalForeground(transform, buffer, x, y, terminal);
+            FixedWidthFontRenderer.drawCursor(transform, buffer, x, y, terminal);
+
+            // The GUI renderer requires that the buffer is non-empty. Add a zero-size vertex so we always have something.
+            for (var i = 0; i < 4; i++) {
+                buffer.addVertex(0, 0, 0).setColor(0x00ffffff).setUv(0, 0).setLight(LightTexture.FULL_BRIGHT);
+            }
+        }
+
+        @Override
+        public RenderPipeline pipeline() {
+            return RenderPipelines.TEXT;
+        }
+    }
 }

projects/common/src/client/java/dan200/computercraft/client/integration/IrisShaderMod.java

@@ -6,12 +6,11 @@ package dan200.computercraft.client.integration;
 
 import com.google.auto.service.AutoService;
 import com.mojang.blaze3d.vertex.VertexFormat;
-import dan200.computercraft.client.render.RenderTypes;
 import dan200.computercraft.client.render.text.DirectFixedWidthFontRenderer;
 import dan200.computercraft.shared.platform.PlatformHelper;
 import net.irisshaders.iris.api.v0.IrisApi;
 import net.irisshaders.iris.api.v0.IrisTextVertexSink;
-import net.minecraft.util.FastColor;
+import net.minecraft.client.renderer.LightTexture;
 
 import java.nio.ByteBuffer;
 import java.util.Optional;
@@ -31,33 +30,31 @@ public class IrisShaderMod implements ShaderMod.Provider {
         }
 
         @Override
-        public DirectFixedWidthFontRenderer.QuadEmitter getQuadEmitter(int vertexCount, IntFunction<ByteBuffer> makeBuffer) {
-            return IrisApi.getInstance().getMinorApiRevision() >= 1
-                ? new IrisQuadEmitter(vertexCount, makeBuffer)
-                : super.getQuadEmitter(vertexCount, makeBuffer);
+        public DirectFixedWidthFontRenderer.QuadEmitter getQuadEmitter(int quadCount, IntFunction<ByteBuffer> makeBuffer) {
+            return new IrisQuadEmitter(quadCount, makeBuffer);
         }
 
-        private static final class IrisQuadEmitter implements DirectFixedWidthFontRenderer.QuadEmitter {
+        private static final class IrisQuadEmitter extends DirectFixedWidthFontRenderer.QuadEmitter {
             private final IrisTextVertexSink sink;
 
-            private IrisQuadEmitter(int vertexCount, IntFunction<ByteBuffer> makeBuffer) {
-                sink = IrisApi.getInstance().createTextVertexSink(vertexCount, makeBuffer);
+            private IrisQuadEmitter(int vertexCount, IntFunction<ByteBuffer> builder) {
+                sink = IrisApi.getInstance().createTextVertexSink(vertexCount, builder);
+            }
+
+            @Override
+            public ByteBuffer byteBuffer() {
+                return sink.getUnderlyingByteBuffer();
+            }
+
+            @Override
+            public void quad(float x1, float y1, float x2, float y2, float z, int colour, float u1, float v1, float u2, float v2) {
+                sink.quad(x1, y1, x2, y2, z, colour, u1, v1, u2, v2, LightTexture.FULL_BRIGHT);
             }
 
             @Override
             public VertexFormat format() {
                 return sink.getUnderlyingVertexFormat();
             }
-
-            @Override
-            public ByteBuffer buffer() {
-                return sink.getUnderlyingByteBuffer();
-            }
-
-            @Override
-            public void quad(float x1, float y1, float x2, float y2, float z, int colour, float u1, float v1, float u2, float v2) {
-                sink.quad(x1, y1, x2, y2, z, FastColor.ABGR32.fromArgb32(colour), u1, v1, u2, v2, RenderTypes.FULL_BRIGHT_LIGHTMAP);
-            }
         }
     }
 }

projects/common/src/client/java/dan200/computercraft/client/integration/ShaderMod.java

@@ -4,15 +4,15 @@
 
 package dan200.computercraft.client.integration;
 
-import dan200.computercraft.client.render.RenderTypes;
 import dan200.computercraft.client.render.text.DirectFixedWidthFontRenderer;
-import dan200.computercraft.client.render.vbo.DirectVertexBuffer;
 
 import java.nio.ByteBuffer;
 import java.util.Optional;
 import java.util.ServiceLoader;
 import java.util.function.IntFunction;
 
+import static dan200.computercraft.client.render.text.FixedWidthFontRenderer.TERMINAL_TEXT;
+
 /**
  * Find the currently loaded shader mod (if present) and provides utilities for interacting with it.
  */
@@ -31,16 +31,14 @@ public class ShaderMod {
     }
 
     /**
-     * Get an appropriate quad emitter for use with {@link DirectVertexBuffer} and {@link DirectFixedWidthFontRenderer} .
+     * Get an appropriate quad emitter for use with a vertex buffer and {@link DirectFixedWidthFontRenderer} .
      *
-     * @param vertexCount The number of vertices.
-     * @param makeBuffer  A function to allocate a temporary buffer.
+     * @param quadCount  The number of quads.
+     * @param makeBuffer A function to allocate a temporary buffer.
      * @return The quad emitter.
      */
-    public DirectFixedWidthFontRenderer.QuadEmitter getQuadEmitter(int vertexCount, IntFunction<ByteBuffer> makeBuffer) {
-        return new DirectFixedWidthFontRenderer.ByteBufferEmitter(
-            makeBuffer.apply(RenderTypes.TERMINAL.format().getVertexSize() * vertexCount * 4)
-        );
+    public DirectFixedWidthFontRenderer.QuadEmitter getQuadEmitter(int quadCount, IntFunction<ByteBuffer> makeBuffer) {
+        return new DirectFixedWidthFontRenderer.ByteBufferEmitter(makeBuffer.apply(TERMINAL_TEXT.format().getVertexSize() * quadCount * 4));
     }
 
     public interface Provider {

projects/common/src/client/java/dan200/computercraft/client/integration/emi/EMIComputerCraft.java

@@ -1,49 +0,0 @@
-// SPDX-FileCopyrightText: 2023 The CC: Tweaked Developers
-//
-// SPDX-License-Identifier: MPL-2.0
-
-package dan200.computercraft.client.integration.emi;
-
-import dan200.computercraft.api.turtle.TurtleSide;
-import dan200.computercraft.shared.ModRegistry;
-import dan200.computercraft.shared.integration.RecipeModHelpers;
-import dan200.computercraft.shared.pocket.items.PocketComputerItem;
-import dan200.computercraft.shared.turtle.items.TurtleItem;
-import dev.emi.emi.api.EmiEntrypoint;
-import dev.emi.emi.api.EmiPlugin;
-import dev.emi.emi.api.EmiRegistry;
-import dev.emi.emi.api.stack.Comparison;
-import dev.emi.emi.api.stack.EmiStack;
-import net.minecraft.client.Minecraft;
-import net.minecraft.world.item.ItemStack;
-
-import java.util.function.BiPredicate;
-
-@EmiEntrypoint
-public class EMIComputerCraft implements EmiPlugin {
-    @Override
-    public void register(EmiRegistry registry) {
-        registry.setDefaultComparison(ModRegistry.Items.TURTLE_NORMAL.get(), turtleComparison);
-        registry.setDefaultComparison(ModRegistry.Items.TURTLE_ADVANCED.get(), turtleComparison);
-
-        registry.setDefaultComparison(ModRegistry.Items.POCKET_COMPUTER_NORMAL.get(), pocketComparison);
-        registry.setDefaultComparison(ModRegistry.Items.POCKET_COMPUTER_ADVANCED.get(), pocketComparison);
-
-        for (var stack : RecipeModHelpers.getExtraStacks(Minecraft.getInstance().level.registryAccess())) {
-            registry.addEmiStack(EmiStack.of(stack));
-        }
-    }
-
-    private static final Comparison turtleComparison = compareStacks((left, right)
-        -> TurtleItem.getUpgrade(left, TurtleSide.LEFT) == TurtleItem.getUpgrade(right, TurtleSide.LEFT)
-        && TurtleItem.getUpgrade(left, TurtleSide.RIGHT) == TurtleItem.getUpgrade(right, TurtleSide.RIGHT));
-
-    private static final Comparison pocketComparison = compareStacks((left, right) -> PocketComputerItem.getUpgrade(left) == PocketComputerItem.getUpgrade(right));
-
-    private static Comparison compareStacks(BiPredicate<ItemStack, ItemStack> test) {
-        return Comparison.of((left, right) -> {
-            ItemStack leftStack = left.getItemStack(), rightStack = right.getItemStack();
-            return leftStack.getItem() == rightStack.getItem() && test.test(leftStack, rightStack);
-        });
-    }
-}

projects/common/src/client/java/dan200/computercraft/client/integration/jei/JEIComputerCraft.java

@@ -8,14 +8,14 @@ import dan200.computercraft.api.ComputerCraftAPI;
 import dan200.computercraft.api.turtle.TurtleSide;
 import dan200.computercraft.shared.ModRegistry;
 import dan200.computercraft.shared.integration.RecipeModHelpers;
-import dan200.computercraft.shared.media.items.DiskItem;
+import dan200.computercraft.shared.pocket.core.PocketSide;
 import dan200.computercraft.shared.pocket.items.PocketComputerItem;
 import dan200.computercraft.shared.turtle.items.TurtleItem;
 import mezz.jei.api.IModPlugin;
 import mezz.jei.api.JeiPlugin;
 import mezz.jei.api.constants.RecipeTypes;
 import mezz.jei.api.constants.VanillaTypes;
-import mezz.jei.api.ingredients.subtypes.IIngredientSubtypeInterpreter;
+import mezz.jei.api.ingredients.subtypes.ISubtypeInterpreter;
 import mezz.jei.api.registration.IAdvancedRegistration;
 import mezz.jei.api.registration.ISubtypeRegistration;
 import mezz.jei.api.runtime.IJeiRuntime;
@@ -23,6 +23,7 @@ import net.minecraft.client.Minecraft;
 import net.minecraft.core.RegistryAccess;
 import net.minecraft.resources.ResourceLocation;
 import net.minecraft.world.item.ItemStack;
+import net.minecraft.world.item.component.DyedItemColor;
 
 import java.util.List;
 
@@ -46,7 +47,7 @@ public class JEIComputerCraft implements IModPlugin {
 
     @Override
     public void registerAdvanced(IAdvancedRegistration registry) {
-        registry.addRecipeManagerPlugin(new RecipeResolver(getRegistryAccess()));
+        registry.addSimpleRecipeManagerPlugin(RecipeTypes.CRAFTING, new RecipeResolver(getRegistryAccess()));
     }
 
     @Override
@@ -62,7 +63,7 @@ public class JEIComputerCraft implements IModPlugin {
         // Hide all upgrade recipes
         var category = registry.createRecipeLookup(RecipeTypes.CRAFTING);
         category.get().forEach(wrapper -> {
-            if (RecipeModHelpers.shouldRemoveRecipe(wrapper.id())) {
+            if (RecipeModHelpers.shouldRemoveRecipe(wrapper.id().location())) {
                 registry.hideRecipes(RecipeTypes.CRAFTING, List.of(wrapper));
             }
         });
@@ -71,7 +72,7 @@ public class JEIComputerCraft implements IModPlugin {
     /**
      * Distinguishes turtles by upgrades and family.
      */
-    private static final IIngredientSubtypeInterpreter<ItemStack> turtleSubtype = (stack, ctx) -> {
+    private static final ISubtypeInterpreter<ItemStack> turtleSubtype = (stack, ctx) -> {
         var name = new StringBuilder("turtle:");
 
         // Add left and right upgrades to the identifier
@@ -87,12 +88,15 @@ public class JEIComputerCraft implements IModPlugin {
     /**
      * Distinguishes pocket computers by upgrade and family.
      */
-    private static final IIngredientSubtypeInterpreter<ItemStack> pocketSubtype = (stack, ctx) -> {
+    private static final ISubtypeInterpreter<ItemStack> pocketSubtype = (stack, ctx) -> {
         var name = new StringBuilder("pocket:");
 
         // Add the upgrade to the identifier
-        var upgrade = PocketComputerItem.getUpgradeWithData(stack);
-        if (upgrade != null) name.append(upgrade.holder().key().location());
+        var back = PocketComputerItem.getUpgradeWithData(stack, PocketSide.BACK);
+        var bottom = PocketComputerItem.getUpgradeWithData(stack, PocketSide.BOTTOM);
+        if (back != null) name.append(back.holder().key().location());
+        if (back != null && bottom != null) name.append('|');
+        if (bottom != null) name.append(bottom.holder().key().location());
 
         return name.toString();
     };
@@ -100,7 +104,7 @@ public class JEIComputerCraft implements IModPlugin {
     /**
      * Distinguishes disks by colour.
      */
-    private static final IIngredientSubtypeInterpreter<ItemStack> diskSubtype = (stack, ctx) -> Integer.toString(DiskItem.getColour(stack));
+    private static final ISubtypeInterpreter<ItemStack> diskSubtype = (stack, ctx) -> Integer.toString(DyedItemColor.getOrDefault(stack, -1));
 
     private static RegistryAccess getRegistryAccess() {
         return Minecraft.getInstance().level.registryAccess();

projects/common/src/client/java/dan200/computercraft/client/integration/jei/RecipeResolver.java

@@ -8,71 +8,90 @@ import dan200.computercraft.api.ComputerCraftAPI;
 import dan200.computercraft.shared.integration.UpgradeRecipeGenerator;
 import dan200.computercraft.shared.pocket.items.PocketComputerItem;
 import dan200.computercraft.shared.turtle.items.TurtleItem;
-import mezz.jei.api.constants.RecipeTypes;
-import mezz.jei.api.recipe.IFocus;
-import mezz.jei.api.recipe.RecipeType;
-import mezz.jei.api.recipe.advanced.IRecipeManagerPlugin;
-import mezz.jei.api.recipe.category.IRecipeCategory;
+import mezz.jei.api.ingredients.ITypedIngredient;
+import mezz.jei.api.recipe.advanced.ISimpleRecipeManagerPlugin;
 import net.minecraft.core.HolderLookup;
+import net.minecraft.core.registries.Registries;
+import net.minecraft.resources.ResourceKey;
 import net.minecraft.resources.ResourceLocation;
 import net.minecraft.world.item.ItemStack;
-import net.minecraft.world.item.crafting.CraftingRecipe;
-import net.minecraft.world.item.crafting.RecipeHolder;
+import net.minecraft.world.item.crafting.*;
+import net.minecraft.world.item.crafting.display.RecipeDisplay;
+import net.minecraft.world.level.Level;
 
 import java.util.List;
 
-class RecipeResolver implements IRecipeManagerPlugin {
-    private final UpgradeRecipeGenerator<RecipeHolder<CraftingRecipe>> resolver;
-
+class RecipeResolver implements ISimpleRecipeManagerPlugin<RecipeHolder<CraftingRecipe>> {
     /**
      * We need to generate unique ids for each recipe, as JEI will attempt to deduplicate them otherwise.
      */
     private int nextId = 0;
 
+    private final UpgradeRecipeGenerator<RecipeHolder<CraftingRecipe>> resolver;
+
     RecipeResolver(HolderLookup.Provider registries) {
-        resolver = new UpgradeRecipeGenerator<>(
-            x -> new RecipeHolder<>(ResourceLocation.fromNamespaceAndPath(ComputerCraftAPI.MOD_ID, "upgrade_" + nextId++), x),
-            registries
-        );
+        resolver = new UpgradeRecipeGenerator<>(x -> new RecipeHolder<>(
+            ResourceKey.create(Registries.RECIPE, ResourceLocation.fromNamespaceAndPath(ComputerCraftAPI.MOD_ID, "upgrade_" + nextId++)),
+            new CraftingWrapper(x)
+        ), registries);
     }
 
     @Override
-    public <V> List<RecipeType<?>> getRecipeTypes(IFocus<V> focus) {
-        var value = focus.getTypedValue().getIngredient();
-        if (!(value instanceof ItemStack stack)) return List.of();
-
-        return switch (focus.getRole()) {
-            case INPUT ->
-                stack.getItem() instanceof TurtleItem || stack.getItem() instanceof PocketComputerItem || resolver.isUpgrade(stack)
-                    ? List.of(RecipeTypes.CRAFTING)
-                    : List.of();
-            case OUTPUT -> stack.getItem() instanceof TurtleItem || stack.getItem() instanceof PocketComputerItem
-                ? List.of(RecipeTypes.CRAFTING)
-                : List.of();
-            default -> List.of();
-        };
+    public boolean isHandledInput(ITypedIngredient<?> input) {
+        return input.getIngredient() instanceof ItemStack stack
+            && (stack.getItem() instanceof TurtleItem || stack.getItem() instanceof PocketComputerItem || resolver.isUpgrade(stack));
     }
 
     @Override
-    public <T, V> List<T> getRecipes(IRecipeCategory<T> recipeCategory, IFocus<V> focus) {
-        if (!(focus.getTypedValue().getIngredient() instanceof ItemStack stack) || recipeCategory.getRecipeType() != RecipeTypes.CRAFTING) {
-            return List.of();
-        }
-
-        return switch (focus.getRole()) {
-            case INPUT -> cast(RecipeTypes.CRAFTING, resolver.findRecipesWithInput(stack));
-            case OUTPUT -> cast(RecipeTypes.CRAFTING, resolver.findRecipesWithOutput(stack));
-            default -> List.of();
-        };
+    public boolean isHandledOutput(ITypedIngredient<?> output) {
+        return output.getIngredient() instanceof ItemStack stack
+            && (stack.getItem() instanceof TurtleItem || stack.getItem() instanceof PocketComputerItem);
     }
 
     @Override
-    public <T> List<T> getRecipes(IRecipeCategory<T> recipeCategory) {
+    public List<RecipeHolder<CraftingRecipe>> getRecipesForInput(ITypedIngredient<?> input) {
+        return input.getIngredient() instanceof ItemStack stack ? resolver.findRecipesWithInput(stack) : List.of();
+    }
+
+    @Override
+    public List<RecipeHolder<CraftingRecipe>> getRecipesForOutput(ITypedIngredient<?> output) {
+        return output.getIngredient() instanceof ItemStack stack ? resolver.findRecipesWithOutput(stack) : List.of();
+    }
+
+    @Override
+    public List<RecipeHolder<CraftingRecipe>> getAllRecipes() {
         return List.of();
     }
 
-    @SuppressWarnings({ "unchecked", "rawtypes", "UnusedVariable" })
-    private static <T, U> List<T> cast(RecipeType<U> ignoredType, List<U> from) {
-        return (List) from;
+    private record CraftingWrapper(RecipeDisplay recipes) implements CraftingRecipe {
+        @Override
+        public RecipeSerializer<? extends CraftingRecipe> getSerializer() {
+            throw new IllegalStateException("Should not serialise CraftingWrapper");
+        }
+
+        @Override
+        public CraftingBookCategory category() {
+            return CraftingBookCategory.MISC;
+        }
+
+        @Override
+        public boolean matches(CraftingInput input, Level level) {
+            return false;
+        }
+
+        @Override
+        public ItemStack assemble(CraftingInput input, HolderLookup.Provider registries) {
+            return ItemStack.EMPTY;
+        }
+
+        @Override
+        public PlacementInfo placementInfo() {
+            return PlacementInfo.NOT_PLACEABLE;
+        }
+
+        @Override
+        public List<RecipeDisplay> display() {
+            return List.of(recipes);
+        }
     }
 }

projects/common/src/client/java/dan200/computercraft/client/item/colour/PocketComputerLight.java

@@ -0,0 +1,43 @@
+// SPDX-FileCopyrightText: 2025 The CC: Tweaked Developers
+//
+// SPDX-License-Identifier: MPL-2.0
+
+package dan200.computercraft.client.item.colour;
+
+import com.mojang.serialization.MapCodec;
+import com.mojang.serialization.codecs.RecordCodecBuilder;
+import dan200.computercraft.api.ComputerCraftAPI;
+import dan200.computercraft.client.pocket.ClientPocketComputers;
+import dan200.computercraft.client.pocket.PocketComputerData;
+import net.minecraft.client.color.item.ItemTintSource;
+import net.minecraft.client.multiplayer.ClientLevel;
+import net.minecraft.resources.ResourceLocation;
+import net.minecraft.util.ARGB;
+import net.minecraft.util.ExtraCodecs;
+import net.minecraft.world.entity.LivingEntity;
+import net.minecraft.world.item.ItemStack;
+import org.jspecify.annotations.Nullable;
+
+/**
+ * An {@link ItemTintSource} that returns the pocket computer's {@linkplain PocketComputerData#getLightState() light
+ * colour}.
+ *
+ * @param defaultColour The default colour, if the light is not currently on.
+ */
+public record PocketComputerLight(int defaultColour) implements ItemTintSource {
+    public static final ResourceLocation ID = ResourceLocation.fromNamespaceAndPath(ComputerCraftAPI.MOD_ID, "pocket_computer_light");
+    public static final MapCodec<PocketComputerLight> CODEC = RecordCodecBuilder.mapCodec(instance -> instance.group(
+        ExtraCodecs.RGB_COLOR_CODEC.fieldOf("default").forGetter(PocketComputerLight::defaultColour)
+    ).apply(instance, PocketComputerLight::new));
+
+    @Override
+    public int calculate(ItemStack stack, @Nullable ClientLevel level, @Nullable LivingEntity holder) {
+        var computer = ClientPocketComputers.get(stack);
+        return computer == null || computer.getLightState() == -1 ? defaultColour : ARGB.opaque(computer.getLightState());
+    }
+
+    @Override
+    public MapCodec<? extends ItemTintSource> type() {
+        return CODEC;
+    }
+}

projects/common/src/client/java/dan200/computercraft/client/item/model/TurtleOverlayModel.java

@@ -0,0 +1,65 @@
+// SPDX-FileCopyrightText: 2025 The CC: Tweaked Developers
+//
+// SPDX-License-Identifier: MPL-2.0
+
+package dan200.computercraft.client.item.model;
+
+import com.mojang.serialization.MapCodec;
+import com.mojang.serialization.codecs.RecordCodecBuilder;
+import dan200.computercraft.api.ComputerCraftAPI;
+import dan200.computercraft.client.turtle.TurtleOverlay;
+import dan200.computercraft.client.turtle.TurtleOverlayManager;
+import dan200.computercraft.shared.turtle.items.TurtleItem;
+import net.minecraft.client.Minecraft;
+import net.minecraft.client.multiplayer.ClientLevel;
+import net.minecraft.client.renderer.block.model.ItemTransforms;
+import net.minecraft.client.renderer.item.ItemModel;
+import net.minecraft.client.renderer.item.ItemModelResolver;
+import net.minecraft.client.renderer.item.ItemStackRenderState;
+import net.minecraft.resources.ResourceLocation;
+import net.minecraft.world.entity.ItemOwner;
+import net.minecraft.world.item.ItemDisplayContext;
+import net.minecraft.world.item.ItemStack;
+import org.jspecify.annotations.Nullable;
+
+/**
+ * An {@link ItemModel} that renders the {@linkplain TurtleOverlay turtle overlay}.
+ *
+ * @param transforms The item transformations from the base model.
+ * @see TurtleOverlay#model()
+ */
+public record TurtleOverlayModel(ItemTransforms transforms) implements ItemModel {
+    public static final ResourceLocation ID = ResourceLocation.fromNamespaceAndPath(ComputerCraftAPI.MOD_ID, "turtle/overlay");
+    public static final MapCodec<Unbaked> CODEC = RecordCodecBuilder.mapCodec(instance -> instance.group(
+        ResourceLocation.CODEC.fieldOf("transforms").forGetter(Unbaked::base)
+    ).apply(instance, Unbaked::new));
+
+    @Override
+    public void update(ItemStackRenderState state, ItemStack stack, ItemModelResolver resolver, ItemDisplayContext context, @Nullable ClientLevel level, @Nullable ItemOwner holder, int light) {
+        var overlay = TurtleItem.getOverlay(stack);
+        if (overlay == null) return;
+
+        state.appendModelIdentityElement(this);
+        state.appendModelIdentityElement(overlay);
+
+        var layer = state.newLayer();
+        TurtleOverlayManager.get(Minecraft.getInstance().getModelManager(), overlay).model().setupItemLayer(layer);
+        layer.setTransform(transforms().getTransform(context));
+    }
+
+    public record Unbaked(ResourceLocation base) implements ItemModel.Unbaked {
+        @Override
+        public MapCodec<Unbaked> type() {
+            return CODEC;
+        }
+
+        @Override
+        public ItemModel bake(BakingContext bakingContext) {
+            return new TurtleOverlayModel(bakingContext.blockModelBaker().getModel(base).getTopTransforms());
+        }
+
+        @Override
+        public void resolveDependencies(Resolver resolver) {
+        }
+    }
+}

projects/common/src/client/java/dan200/computercraft/client/item/model/TurtleUpgradeModel.java

@@ -0,0 +1,63 @@
+// SPDX-FileCopyrightText: 2025 The CC: Tweaked Developers
+//
+// SPDX-License-Identifier: MPL-2.0
+
+package dan200.computercraft.client.item.model;
+
+import com.mojang.serialization.MapCodec;
+import com.mojang.serialization.codecs.RecordCodecBuilder;
+import dan200.computercraft.api.ComputerCraftAPI;
+import dan200.computercraft.api.turtle.TurtleSide;
+import dan200.computercraft.client.turtle.TurtleUpgradeModelManager;
+import dan200.computercraft.shared.turtle.items.TurtleItem;
+import net.minecraft.client.Minecraft;
+import net.minecraft.client.multiplayer.ClientLevel;
+import net.minecraft.client.renderer.block.model.ItemTransforms;
+import net.minecraft.client.renderer.item.ItemModel;
+import net.minecraft.client.renderer.item.ItemModelResolver;
+import net.minecraft.client.renderer.item.ItemStackRenderState;
+import net.minecraft.resources.ResourceLocation;
+import net.minecraft.world.entity.ItemOwner;
+import net.minecraft.world.item.ItemDisplayContext;
+import net.minecraft.world.item.ItemStack;
+import org.jspecify.annotations.Nullable;
+
+/**
+ * An {@link ItemModel} that renders a turtle upgrade, using its {@link dan200.computercraft.api.client.turtle.TurtleUpgradeModel}.
+ *
+ * @param side The side the upgrade resides on.
+ * @param base The base model. Only used to provide item transforms.
+ */
+public record TurtleUpgradeModel(TurtleSide side, ItemTransforms base) implements ItemModel {
+    public static final ResourceLocation ID = ResourceLocation.fromNamespaceAndPath(ComputerCraftAPI.MOD_ID, "turtle/upgrade");
+    public static final MapCodec<Unbaked> CODEC = RecordCodecBuilder.mapCodec(instance -> instance.group(
+        TurtleSide.CODEC.fieldOf("side").forGetter(Unbaked::side),
+        ResourceLocation.CODEC.fieldOf("transforms").forGetter(Unbaked::base)
+    ).apply(instance, Unbaked::new));
+
+    @Override
+    public void update(ItemStackRenderState state, ItemStack stack, ItemModelResolver resolver, ItemDisplayContext context, @Nullable ClientLevel level, @Nullable ItemOwner holder, int seed) {
+        var upgrade = TurtleItem.getUpgradeWithData(stack, side);
+        if (upgrade == null) return;
+
+        TurtleUpgradeModelManager.get(Minecraft.getInstance().getModelManager(), upgrade.holder())
+            .renderForItem(upgrade, side, state, resolver, base.getTransform(context), seed);
+    }
+
+    public record Unbaked(TurtleSide side, ResourceLocation base) implements ItemModel.Unbaked {
+        @Override
+        public MapCodec<Unbaked> type() {
+            return CODEC;
+        }
+
+        @Override
+        public ItemModel bake(BakingContext bakingContext) {
+            return new TurtleUpgradeModel(side, bakingContext.blockModelBaker().getModel(base).getTopTransforms());
+        }
+
+        @Override
+        public void resolveDependencies(Resolver resolver) {
+            resolver.markDependency(base);
+        }
+    }
+}

projects/common/src/client/java/dan200/computercraft/client/item/properties/PocketComputerStateProperty.java

@@ -0,0 +1,51 @@
+// SPDX-FileCopyrightText: 2025 The CC: Tweaked Developers
+//
+// SPDX-License-Identifier: MPL-2.0
+
+package dan200.computercraft.client.item.properties;
+
+import com.mojang.serialization.Codec;
+import com.mojang.serialization.MapCodec;
+import dan200.computercraft.api.ComputerCraftAPI;
+import dan200.computercraft.client.pocket.ClientPocketComputers;
+import dan200.computercraft.shared.computer.core.ComputerState;
+import net.minecraft.client.multiplayer.ClientLevel;
+import net.minecraft.client.renderer.item.properties.select.SelectItemModelProperty;
+import net.minecraft.resources.ResourceLocation;
+import net.minecraft.world.entity.LivingEntity;
+import net.minecraft.world.item.ItemDisplayContext;
+import net.minecraft.world.item.ItemStack;
+import org.jspecify.annotations.Nullable;
+
+/**
+ * A {@link SelectItemModelProperty} that returns the pocket computer's current state.
+ */
+public final class PocketComputerStateProperty implements SelectItemModelProperty<ComputerState> {
+    public static final ResourceLocation ID = ResourceLocation.fromNamespaceAndPath(ComputerCraftAPI.MOD_ID, "pocket_computer_state");
+    private static final PocketComputerStateProperty INSTANCE = new PocketComputerStateProperty();
+    public static final MapCodec<PocketComputerStateProperty> CODEC = MapCodec.unit(INSTANCE);
+    public static final Type<PocketComputerStateProperty, ComputerState> TYPE = Type.create(CODEC, ComputerState.CODEC);
+
+    private PocketComputerStateProperty() {
+    }
+
+    public static PocketComputerStateProperty create() {
+        return INSTANCE;
+    }
+
+    @Override
+    public ComputerState get(ItemStack stack, @Nullable ClientLevel level, @Nullable LivingEntity holder, int i, ItemDisplayContext context) {
+        var computer = ClientPocketComputers.get(stack);
+        return computer == null ? ComputerState.OFF : computer.getState();
+    }
+
+    @Override
+    public Codec<ComputerState> valueCodec() {
+        return ComputerState.CODEC;
+    }
+
+    @Override
+    public Type<? extends SelectItemModelProperty<ComputerState>, ComputerState> type() {
+        return TYPE;
+    }
+}

projects/common/src/client/java/dan200/computercraft/client/item/properties/TurtleShowElfOverlay.java

@@ -0,0 +1,46 @@
+// SPDX-FileCopyrightText: 2025 The CC: Tweaked Developers
+//
+// SPDX-License-Identifier: MPL-2.0
+
+package dan200.computercraft.client.item.properties;
+
+import com.mojang.serialization.MapCodec;
+import dan200.computercraft.api.ComputerCraftAPI;
+import dan200.computercraft.client.turtle.TurtleOverlay;
+import dan200.computercraft.client.turtle.TurtleOverlayManager;
+import dan200.computercraft.shared.turtle.items.TurtleItem;
+import net.minecraft.client.Minecraft;
+import net.minecraft.client.multiplayer.ClientLevel;
+import net.minecraft.client.renderer.item.properties.conditional.ConditionalItemModelProperty;
+import net.minecraft.resources.ResourceLocation;
+import net.minecraft.world.entity.LivingEntity;
+import net.minecraft.world.item.ItemDisplayContext;
+import net.minecraft.world.item.ItemStack;
+import org.jspecify.annotations.Nullable;
+
+/**
+ * An item property that determines whether the turtle's current {@linkplain TurtleOverlay overlay} is compatible
+ * with the Christmas overlay.
+ *
+ * @see TurtleOverlay#showElfOverlay()
+ */
+public class TurtleShowElfOverlay implements ConditionalItemModelProperty {
+    public static final ResourceLocation ID = ResourceLocation.fromNamespaceAndPath(ComputerCraftAPI.MOD_ID, "turtle/show_elf_overlay");
+    private static final TurtleShowElfOverlay INSTANCE = new TurtleShowElfOverlay();
+    public static final MapCodec<TurtleShowElfOverlay> CODEC = MapCodec.unit(INSTANCE);
+
+    @Override
+    public boolean get(ItemStack stack, @Nullable ClientLevel level, @Nullable LivingEntity holder, int i, ItemDisplayContext context) {
+        var overlay = TurtleOverlayManager.get(Minecraft.getInstance().getModelManager(), TurtleItem.getOverlay(stack));
+        return overlay == null || overlay.showElfOverlay();
+    }
+
+    public static TurtleShowElfOverlay create() {
+        return INSTANCE;
+    }
+
+    @Override
+    public MapCodec<? extends ConditionalItemModelProperty> type() {
+        return CODEC;
+    }
+}

projects/common/src/client/java/dan200/computercraft/client/model/ExtraModels.java

@@ -1,68 +0,0 @@
-// SPDX-FileCopyrightText: 2024 The CC: Tweaked Developers
-//
-// SPDX-License-Identifier: MPL-2.0
-
-package dan200.computercraft.client.model;
-
-import com.google.gson.Gson;
-import com.google.gson.JsonElement;
-import com.google.gson.JsonParseException;
-import com.mojang.serialization.Codec;
-import com.mojang.serialization.JsonOps;
-import dan200.computercraft.api.ComputerCraftAPI;
-import dan200.computercraft.shared.turtle.TurtleOverlay;
-import net.minecraft.resources.ResourceLocation;
-import net.minecraft.server.packs.resources.ResourceManager;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
-import java.io.IOException;
-import java.util.*;
-
-/**
- * A list of extra models to load on the client.
- * <p>
- * This is largely intended for use with {@linkplain TurtleOverlay turtle overlays}. As overlays are stored in a dynamic
- * registry, they are not available when resources are loaded, and so we need a way to request the overlays' models be
- * loaded.
- *
- * @param models The models to load.
- */
-public record ExtraModels(List<ResourceLocation> models) {
-    private static final Logger LOG = LoggerFactory.getLogger(ExtraModels.class);
-    private static final Gson GSON = new Gson();
-
-    /**
-     * The path where the extra models are listed.
-     */
-    public static final ResourceLocation PATH = ResourceLocation.fromNamespaceAndPath(ComputerCraftAPI.MOD_ID, "extra_models.json");
-
-    /**
-     * The coded used to store the extra model file.
-     */
-    public static final Codec<ExtraModels> CODEC = ResourceLocation.CODEC.listOf().xmap(ExtraModels::new, ExtraModels::models);
-
-    /**
-     * Get the list of all extra models to load.
-     *
-     * @param resources The current resource manager.
-     * @return A set of all resources to load.
-     */
-    public static Collection<ResourceLocation> loadAll(ResourceManager resources) {
-        Set<ResourceLocation> out = new HashSet<>();
-
-        for (var path : resources.getResourceStack(PATH)) {
-            ExtraModels models;
-            try (var stream = path.openAsReader()) {
-                models = ExtraModels.CODEC.parse(JsonOps.INSTANCE, GSON.fromJson(stream, JsonElement.class)).getOrThrow(JsonParseException::new);
-            } catch (IOException | RuntimeException e) {
-                LOG.error("Failed to load extra models from {}", path.sourcePackId());
-                continue;
-            }
-
-            out.addAll(models.models());
-        }
-
-        return Collections.unmodifiableCollection(out);
-    }
-}

projects/common/src/client/java/dan200/computercraft/client/model/LecternBookModel.java

@@ -0,0 +1,65 @@
+// SPDX-FileCopyrightText: 2025 The CC: Tweaked Developers
+//
+// SPDX-License-Identifier: MPL-2.0
+
+package dan200.computercraft.client.model;
+
+import dan200.computercraft.api.ComputerCraftAPI;
+import dan200.computercraft.client.render.CustomLecternRenderer;
+import dan200.computercraft.shared.media.items.PrintoutItem;
+import net.minecraft.client.model.Model;
+import net.minecraft.client.model.geom.ModelLayerLocation;
+import net.minecraft.client.model.geom.ModelPart;
+import net.minecraft.client.model.geom.PartPose;
+import net.minecraft.client.model.geom.builders.CubeListBuilder;
+import net.minecraft.client.model.geom.builders.LayerDefinition;
+import net.minecraft.client.model.geom.builders.MeshDefinition;
+import net.minecraft.client.renderer.RenderType;
+import net.minecraft.resources.ResourceLocation;
+import net.minecraft.util.Unit;
+
+import static dan200.computercraft.client.model.LecternPrintoutModelDefinitions.TEXTURE_HEIGHT;
+import static dan200.computercraft.client.model.LecternPrintoutModelDefinitions.TEXTURE_WIDTH;
+
+/**
+ * A model for {@linkplain PrintoutItem printed books} placed on a lectern.
+ *
+ * @see CustomLecternRenderer
+ */
+public final class LecternBookModel extends Model<Unit> {
+    public static final ModelLayerLocation LAYER = new ModelLayerLocation(ResourceLocation.fromNamespaceAndPath(ComputerCraftAPI.MOD_ID, "lectern_book"), "main");
+
+    public LecternBookModel(ModelPart root) {
+        super(root, RenderType::entitySolid);
+    }
+
+    public static LayerDefinition createLayer() {
+        var mesh = new MeshDefinition();
+        var parts = mesh.getRoot();
+
+        parts.addOrReplaceChild(
+            "spine",
+            CubeListBuilder.create().texOffs(12, 15).addBox(-0.005f, -5.0f, -0.5f, 0, 10, 1.0f),
+            PartPose.ZERO
+        );
+
+        var angle = (float) Math.toRadians(5);
+        parts.addOrReplaceChild(
+            "left",
+            CubeListBuilder.create()
+                .texOffs(0, 10).addBox(0, -5.0f, -6.0f, 0, 10, 6.0f)
+                .texOffs(0, 0).addBox(0.005f, -4.0f, -5.0f, 1.0f, 8.0f, 5.0f),
+            PartPose.offsetAndRotation(-0.005f, 0, -0.5f, 0, -angle, 0)
+        );
+
+        parts.addOrReplaceChild(
+            "right",
+            CubeListBuilder.create()
+                .texOffs(14, 10).addBox(0, -5.0f, 0, 0, 10, 6.0f)
+                .texOffs(0, 0).addBox(0.005f, -4.0f, 0, 1.0f, 8.0f, 5.0f),
+            PartPose.offsetAndRotation(-0.005f, 0, 0.5f, 0, angle, 0)
+        );
+
+        return LayerDefinition.create(mesh, TEXTURE_WIDTH, TEXTURE_HEIGHT);
+    }
+}

projects/common/src/client/java/dan200/computercraft/client/model/LecternPocketModel.java

@@ -10,16 +10,22 @@ import dan200.computercraft.client.pocket.PocketComputerData;
 import dan200.computercraft.client.render.CustomLecternRenderer;
 import dan200.computercraft.shared.computer.core.ComputerFamily;
 import dan200.computercraft.shared.pocket.items.PocketComputerItem;
+import net.minecraft.client.model.Model;
+import net.minecraft.client.model.geom.ModelLayerLocation;
 import net.minecraft.client.model.geom.ModelPart;
 import net.minecraft.client.model.geom.PartPose;
 import net.minecraft.client.model.geom.builders.CubeListBuilder;
+import net.minecraft.client.model.geom.builders.LayerDefinition;
 import net.minecraft.client.model.geom.builders.MeshDefinition;
 import net.minecraft.client.renderer.LightTexture;
-import net.minecraft.client.renderer.MultiBufferSource;
 import net.minecraft.client.renderer.RenderType;
+import net.minecraft.client.renderer.Sheets;
+import net.minecraft.client.renderer.SubmitNodeCollector;
+import net.minecraft.client.renderer.texture.OverlayTexture;
 import net.minecraft.client.resources.model.Material;
+import net.minecraft.client.resources.model.MaterialSet;
 import net.minecraft.resources.ResourceLocation;
-import net.minecraft.world.inventory.InventoryMenu;
+import net.minecraft.util.Unit;
 import net.minecraft.world.item.component.DyedItemColor;
 
 /**
@@ -27,18 +33,14 @@ import net.minecraft.world.item.component.DyedItemColor;
  *
  * @see CustomLecternRenderer
  */
-public class LecternPocketModel {
-    public static final ResourceLocation TEXTURE_NORMAL = ResourceLocation.fromNamespaceAndPath(ComputerCraftAPI.MOD_ID, "entity/pocket_computer_normal");
-    public static final ResourceLocation TEXTURE_ADVANCED = ResourceLocation.fromNamespaceAndPath(ComputerCraftAPI.MOD_ID, "entity/pocket_computer_advanced");
-    public static final ResourceLocation TEXTURE_COLOUR = ResourceLocation.fromNamespaceAndPath(ComputerCraftAPI.MOD_ID, "entity/pocket_computer_colour");
-    public static final ResourceLocation TEXTURE_FRAME = ResourceLocation.fromNamespaceAndPath(ComputerCraftAPI.MOD_ID, "entity/pocket_computer_frame");
-    public static final ResourceLocation TEXTURE_LIGHT = ResourceLocation.fromNamespaceAndPath(ComputerCraftAPI.MOD_ID, "entity/pocket_computer_light");
+public class LecternPocketModel extends Model<Unit> {
+    public static final ModelLayerLocation LAYER = new ModelLayerLocation(ResourceLocation.fromNamespaceAndPath(ComputerCraftAPI.MOD_ID, "lectern_pocket"), "main");
 
-    private static final Material MATERIAL_NORMAL = new Material(InventoryMenu.BLOCK_ATLAS, TEXTURE_NORMAL);
-    private static final Material MATERIAL_ADVANCED = new Material(InventoryMenu.BLOCK_ATLAS, TEXTURE_ADVANCED);
-    private static final Material MATERIAL_COLOUR = new Material(InventoryMenu.BLOCK_ATLAS, TEXTURE_COLOUR);
-    private static final Material MATERIAL_FRAME = new Material(InventoryMenu.BLOCK_ATLAS, TEXTURE_FRAME);
-    private static final Material MATERIAL_LIGHT = new Material(InventoryMenu.BLOCK_ATLAS, TEXTURE_LIGHT);
+    public static final Material MATERIAL_NORMAL = Sheets.BLOCK_ENTITIES_MAPPER.apply(ResourceLocation.fromNamespaceAndPath(ComputerCraftAPI.MOD_ID, "pocket_computer_normal"));
+    public static final Material MATERIAL_ADVANCED = Sheets.BLOCK_ENTITIES_MAPPER.apply(ResourceLocation.fromNamespaceAndPath(ComputerCraftAPI.MOD_ID, "pocket_computer_advanced"));
+    public static final Material MATERIAL_COLOUR = Sheets.BLOCK_ENTITIES_MAPPER.apply(ResourceLocation.fromNamespaceAndPath(ComputerCraftAPI.MOD_ID, "pocket_computer_colour"));
+    public static final Material MATERIAL_FRAME = Sheets.BLOCK_ENTITIES_MAPPER.apply(ResourceLocation.fromNamespaceAndPath(ComputerCraftAPI.MOD_ID, "pocket_computer_frame"));
+    public static final Material MATERIAL_LIGHT = Sheets.BLOCK_ENTITIES_MAPPER.apply(ResourceLocation.fromNamespaceAndPath(ComputerCraftAPI.MOD_ID, "pocket_computer_light"));
 
     // The size of the terminal within the model.
     public static final float TERM_WIDTH = 12.0f / 32.0f;
@@ -48,13 +50,11 @@ public class LecternPocketModel {
     private static final int TEXTURE_WIDTH = 48 / 2;
     private static final int TEXTURE_HEIGHT = 48 / 2;
 
-    private final ModelPart root;
-
-    public LecternPocketModel() {
-        root = buildPages();
+    public LecternPocketModel(ModelPart root) {
+        super(root, RenderType::entityCutout);
     }
 
-    private static ModelPart buildPages() {
+    public static LayerDefinition createLayer() {
         var mesh = new MeshDefinition();
         var parts = mesh.getRoot();
         parts.addOrReplaceChild(
@@ -62,29 +62,43 @@ public class LecternPocketModel {
             CubeListBuilder.create().texOffs(0, 0).addBox(0f, -5.0f, -4.0f, 1f, 10.0f, 8.0f),
             PartPose.ZERO
         );
-        return mesh.getRoot().bake(TEXTURE_WIDTH, TEXTURE_HEIGHT);
+        return LayerDefinition.create(mesh, TEXTURE_WIDTH, TEXTURE_HEIGHT);
     }
 
     /**
      * Render the pocket computer model.
      *
-     * @param poseStack     The current pose stack.
-     * @param bufferSource  The buffer source to draw to.
-     * @param packedLight   The current light level.
-     * @param packedOverlay The overlay texture (used for entity hurt animation).
-     * @param family        The computer family.
-     * @param frameColour   The pocket computer's {@linkplain DyedItemColor colour}.
-     * @param lightColour   The pocket computer's {@linkplain PocketComputerData#getLightState() light colour}.
+     * @param poseStack   The current pose stack.
+     * @param collector   The collector to draw to.
+     * @param materials   The current materials
+     * @param packedLight The current light level.
+     * @param family      The computer family.
+     * @param frameColour The pocket computer's {@linkplain DyedItemColor colour}.
+     * @param lightColour The pocket computer's {@linkplain PocketComputerData#getLightState() light colour}.
      */
-    public void render(PoseStack poseStack, MultiBufferSource bufferSource, int packedLight, int packedOverlay, ComputerFamily family, int frameColour, int lightColour) {
+    public void submit(
+        PoseStack poseStack, SubmitNodeCollector collector, MaterialSet materials, int packedLight, ComputerFamily family, int frameColour, int lightColour
+    ) {
         if (frameColour != -1) {
-            root.render(poseStack, MATERIAL_FRAME.buffer(bufferSource, RenderType::entityCutout), packedLight, packedOverlay);
-            root.render(poseStack, MATERIAL_COLOUR.buffer(bufferSource, RenderType::entityCutout), packedLight, packedOverlay, frameColour);
+            collector.submitModel(
+                this, Unit.INSTANCE, poseStack, MATERIAL_FRAME.renderType(RenderType::entityCutout),
+                packedLight, OverlayTexture.NO_OVERLAY, -1, materials.get(MATERIAL_FRAME), 0, null
+            );
+            collector.submitModel(
+                this, Unit.INSTANCE, poseStack, MATERIAL_COLOUR.renderType(RenderType::entityCutout),
+                packedLight, OverlayTexture.NO_OVERLAY, frameColour, materials.get(MATERIAL_COLOUR), 0, null
+            );
         } else {
-            var buffer = (family == ComputerFamily.ADVANCED ? MATERIAL_ADVANCED : MATERIAL_NORMAL).buffer(bufferSource, RenderType::entityCutout);
-            root.render(poseStack, buffer, packedLight, packedOverlay);
+            var material = family == ComputerFamily.ADVANCED ? MATERIAL_ADVANCED : MATERIAL_NORMAL;
+            collector.submitModel(
+                this, Unit.INSTANCE, poseStack, material.renderType(RenderType::entityCutout),
+                packedLight, OverlayTexture.NO_OVERLAY, -1, materials.get(material), 0, null
+            );
         }
 
-        root.render(poseStack, MATERIAL_LIGHT.buffer(bufferSource, RenderType::entityCutout), LightTexture.FULL_BRIGHT, packedOverlay, lightColour);
+        collector.submitModel(
+            this, Unit.INSTANCE, poseStack, MATERIAL_LIGHT.renderType(RenderType::entityCutout),
+            LightTexture.FULL_BRIGHT, OverlayTexture.NO_OVERLAY, lightColour, materials.get(MATERIAL_LIGHT), 0, null
+        );
     }
 }

projects/common/src/client/java/dan200/computercraft/client/model/LecternPrintoutModel.java

@@ -4,52 +4,46 @@
 
 package dan200.computercraft.client.model;
 
-import com.mojang.blaze3d.vertex.PoseStack;
-import com.mojang.blaze3d.vertex.VertexConsumer;
 import dan200.computercraft.api.ComputerCraftAPI;
 import dan200.computercraft.client.render.CustomLecternRenderer;
 import dan200.computercraft.shared.media.items.PrintoutItem;
+import net.minecraft.client.model.Model;
+import net.minecraft.client.model.geom.ModelLayerLocation;
 import net.minecraft.client.model.geom.ModelPart;
 import net.minecraft.client.model.geom.PartPose;
 import net.minecraft.client.model.geom.builders.CubeListBuilder;
+import net.minecraft.client.model.geom.builders.LayerDefinition;
 import net.minecraft.client.model.geom.builders.MeshDefinition;
-import net.minecraft.client.resources.model.Material;
+import net.minecraft.client.renderer.RenderType;
 import net.minecraft.resources.ResourceLocation;
-import net.minecraft.world.inventory.InventoryMenu;
 
 import java.util.List;
 
+import static dan200.computercraft.client.model.LecternPrintoutModelDefinitions.TEXTURE_HEIGHT;
+import static dan200.computercraft.client.model.LecternPrintoutModelDefinitions.TEXTURE_WIDTH;
+
 /**
- * A model for {@linkplain PrintoutItem printouts} placed on a lectern.
- * <p>
- * This provides two models, {@linkplain #renderPages(PoseStack, VertexConsumer, int, int, int) one for a variable
- * number of pages}, and {@linkplain #renderBook(PoseStack, VertexConsumer, int, int) one for books}.
+ * A model for {@linkplain PrintoutItem printouts} placed on a lectern. This renders a variable number of pages (1-3),
+ * stored in {@link State#pages}.
  *
  * @see CustomLecternRenderer
  */
-public class LecternPrintoutModel {
-    public static final ResourceLocation TEXTURE = ResourceLocation.fromNamespaceAndPath(ComputerCraftAPI.MOD_ID, "entity/printout");
-    public static final Material MATERIAL = new Material(InventoryMenu.BLOCK_ATLAS, TEXTURE);
-
-    private static final int TEXTURE_WIDTH = 32;
-    private static final int TEXTURE_HEIGHT = 32;
+public final class LecternPrintoutModel extends Model<LecternPrintoutModel.State> {
+    public static final ModelLayerLocation LAYER = new ModelLayerLocation(ResourceLocation.fromNamespaceAndPath(ComputerCraftAPI.MOD_ID, "lectern_printout"), "main");
 
     private static final String PAGE_1 = "page_1";
     private static final String PAGE_2 = "page_2";
     private static final String PAGE_3 = "page_3";
     private static final List<String> PAGES = List.of(PAGE_1, PAGE_2, PAGE_3);
 
-    private final ModelPart pagesRoot;
-    private final ModelPart bookRoot;
     private final ModelPart[] pages;
 
-    public LecternPrintoutModel() {
-        pagesRoot = buildPages();
-        bookRoot = buildBook();
-        pages = PAGES.stream().map(pagesRoot::getChild).toArray(ModelPart[]::new);
+    public LecternPrintoutModel(ModelPart root) {
+        super(root, RenderType::entitySolid);
+        pages = PAGES.stream().map(root::getChild).toArray(ModelPart[]::new);
     }
 
-    private static ModelPart buildPages() {
+    public static LayerDefinition createLayer() {
         var mesh = new MeshDefinition();
         var parts = mesh.getRoot();
         parts.addOrReplaceChild(
@@ -69,49 +63,20 @@ public class LecternPrintoutModel {
             PartPose.offsetAndRotation(-0.25f, 0, -1.5f, (float) -Math.PI * (2f / 16), 0, 0)
         );
 
-        return mesh.getRoot().bake(TEXTURE_WIDTH, TEXTURE_HEIGHT);
+        return LayerDefinition.create(mesh, TEXTURE_WIDTH, TEXTURE_HEIGHT);
     }
 
-    private static ModelPart buildBook() {
-        var mesh = new MeshDefinition();
-        var parts = mesh.getRoot();
-
-        parts.addOrReplaceChild(
-            "spine",
-            CubeListBuilder.create().texOffs(12, 15).addBox(-0.005f, -5.0f, -0.5f, 0, 10, 1.0f),
-            PartPose.ZERO
-        );
-
-        var angle = (float) Math.toRadians(5);
-        parts.addOrReplaceChild(
-            "left",
-            CubeListBuilder.create()
-                .texOffs(0, 10).addBox(0, -5.0f, -6.0f, 0, 10, 6.0f)
-                .texOffs(0, 0).addBox(0.005f, -4.0f, -5.0f, 1.0f, 8.0f, 5.0f),
-            PartPose.offsetAndRotation(-0.005f, 0, -0.5f, 0, -angle, 0)
-        );
-
-        parts.addOrReplaceChild(
-            "right",
-            CubeListBuilder.create()
-                .texOffs(14, 10).addBox(0, -5.0f, 0, 0, 10, 6.0f)
-                .texOffs(0, 0).addBox(0.005f, -4.0f, 0, 1.0f, 8.0f, 5.0f),
-            PartPose.offsetAndRotation(-0.005f, 0, 0.5f, 0, angle, 0)
-        );
-
-        return mesh.getRoot().bake(TEXTURE_WIDTH, TEXTURE_HEIGHT);
-    }
-
-    public void renderBook(PoseStack poseStack, VertexConsumer buffer, int packedLight, int packedOverlay) {
-        bookRoot.render(poseStack, buffer, packedLight, packedOverlay);
-    }
-
-    public void renderPages(PoseStack poseStack, VertexConsumer buffer, int packedLight, int packedOverlay, int pageCount) {
+    @Override
+    public void setupAnim(State renderState) {
+        var pageCount = renderState.pages;
         if (pageCount > pages.length) pageCount = pages.length;
+
         var i = 0;
         for (; i < pageCount; i++) pages[i].visible = true;
         for (; i < pages.length; i++) pages[i].visible = false;
+    }
 
-        pagesRoot.render(poseStack, buffer, packedLight, packedOverlay);
+    public static class State {
+        public int pages;
     }
 }

projects/common/src/client/java/dan200/computercraft/client/model/LecternPrintoutModelDefinitions.java

@@ -0,0 +1,26 @@
+// SPDX-FileCopyrightText: 2025 The CC: Tweaked Developers
+//
+// SPDX-License-Identifier: MPL-2.0
+
+package dan200.computercraft.client.model;
+
+import dan200.computercraft.api.ComputerCraftAPI;
+import net.minecraft.client.renderer.Sheets;
+import net.minecraft.client.resources.model.Material;
+import net.minecraft.resources.ResourceLocation;
+
+/**
+ * Definitions for the lectern printout model.
+ *
+ * @see LecternBookModel
+ * @see LecternPrintoutModel
+ */
+public final class LecternPrintoutModelDefinitions {
+    public static final Material MATERIAL = Sheets.BLOCK_ENTITIES_MAPPER.apply(ResourceLocation.fromNamespaceAndPath(ComputerCraftAPI.MOD_ID, "printout"));
+
+    static final int TEXTURE_WIDTH = 32;
+    static final int TEXTURE_HEIGHT = 32;
+
+    private LecternPrintoutModelDefinitions() {
+    }
+}

projects/common/src/client/java/dan200/computercraft/client/model/turtle/ModelTransformer.java

@@ -1,92 +0,0 @@
-// SPDX-FileCopyrightText: 2023 The CC: Tweaked Developers
-//
-// SPDX-License-Identifier: MPL-2.0
-
-package dan200.computercraft.client.model.turtle;
-
-import com.mojang.math.Transformation;
-import net.minecraft.client.renderer.block.model.BakedQuad;
-import net.minecraft.client.renderer.block.model.FaceBakery;
-import net.minecraft.client.resources.model.BakedModel;
-import net.minecraft.core.Direction;
-import org.joml.Matrix4f;
-import org.joml.Vector4f;
-import org.jspecify.annotations.Nullable;
-
-import java.util.ArrayList;
-import java.util.List;
-
-/**
- * Applies a {@link Transformation} (or rather a {@link Matrix4f}) to a list of {@link BakedQuad}s.
- * <p>
- * This does a little bit of magic compared with other system (i.e. Forge's {@code QuadTransformers}), as it needs to
- * handle flipping models upside down.
- * <p>
- * This is typically used with a {@link BakedModel} subclass - see the loader-specific projects.
- */
-public class ModelTransformer {
-    private static final int[] INVERSE_ORDER = new int[]{ 3, 2, 1, 0 };
-
-    private static final int STRIDE = FaceBakery.VERTEX_INT_SIZE;
-    private static final int POS_OFFSET = 0;
-
-    protected final Matrix4f transformation;
-    protected final boolean invert;
-    private @Nullable TransformedQuads cache;
-
-    public ModelTransformer(Transformation transformation) {
-        this.transformation = transformation.getMatrix();
-        invert = transformation.getMatrix().determinant() < 0;
-    }
-
-    public List<BakedQuad> transform(List<BakedQuad> quads) {
-        if (quads.isEmpty()) return List.of();
-
-        // We do some basic caching here to avoid recomputing every frame. Most turtle models don't have culled faces,
-        // so it's not worth being smarter here.
-        var cache = this.cache;
-        if (cache != null && quads.equals(cache.original())) return cache.transformed();
-
-        List<BakedQuad> transformed = new ArrayList<>(quads.size());
-        for (var quad : quads) transformed.add(transformQuad(quad));
-        this.cache = new TransformedQuads(quads, transformed);
-        return transformed;
-    }
-
-    private BakedQuad transformQuad(BakedQuad quad) {
-        var inputData = quad.getVertices();
-        var outputData = new int[inputData.length];
-        for (var i = 0; i < 4; i++) {
-            var inStart = STRIDE * i;
-            // Reverse the order of the quads if we're inverting
-            var outStart = getVertexOffset(i, invert);
-            System.arraycopy(inputData, inStart, outputData, outStart, STRIDE);
-
-            // Apply the matrix to our position
-            var inPosStart = inStart + POS_OFFSET;
-            var outPosStart = outStart + POS_OFFSET;
-
-            var x = Float.intBitsToFloat(inputData[inPosStart]);
-            var y = Float.intBitsToFloat(inputData[inPosStart + 1]);
-            var z = Float.intBitsToFloat(inputData[inPosStart + 2]);
-
-            // Transform the position
-            var pos = new Vector4f(x, y, z, 1);
-            transformation.transformProject(pos);
-
-            outputData[outPosStart] = Float.floatToRawIntBits(pos.x());
-            outputData[outPosStart + 1] = Float.floatToRawIntBits(pos.y());
-            outputData[outPosStart + 2] = Float.floatToRawIntBits(pos.z());
-        }
-
-        var direction = Direction.rotate(transformation, quad.getDirection());
-        return new BakedQuad(outputData, quad.getTintIndex(), direction, quad.getSprite(), quad.isShade());
-    }
-
-    public static int getVertexOffset(int vertex, boolean invert) {
-        return (invert ? ModelTransformer.INVERSE_ORDER[vertex] : vertex) * ModelTransformer.STRIDE;
-    }
-
-    private record TransformedQuads(List<BakedQuad> original, List<BakedQuad> transformed) {
-    }
-}

projects/common/src/client/java/dan200/computercraft/client/model/turtle/TurtleModelParts.java

@@ -1,146 +0,0 @@
-// Copyright Daniel Ratcliffe, 2011-2022. Do not distribute without permission.
-//
-// SPDX-License-Identifier: LicenseRef-CCPL
-
-package dan200.computercraft.client.model.turtle;
-
-import com.google.common.cache.CacheBuilder;
-import com.mojang.blaze3d.vertex.PoseStack;
-import com.mojang.math.Transformation;
-import dan200.computercraft.api.client.TransformedModel;
-import dan200.computercraft.api.turtle.ITurtleUpgrade;
-import dan200.computercraft.api.turtle.TurtleSide;
-import dan200.computercraft.api.upgrades.UpgradeData;
-import dan200.computercraft.client.platform.ClientPlatformHelper;
-import dan200.computercraft.client.turtle.TurtleUpgradeModellers;
-import dan200.computercraft.shared.turtle.TurtleOverlay;
-import dan200.computercraft.shared.turtle.items.TurtleItem;
-import dan200.computercraft.shared.util.DataComponentUtil;
-import dan200.computercraft.shared.util.Holiday;
-import net.minecraft.client.Minecraft;
-import net.minecraft.client.resources.model.BakedModel;
-import net.minecraft.client.resources.model.ModelManager;
-import net.minecraft.core.component.DataComponents;
-import net.minecraft.resources.ResourceLocation;
-import net.minecraft.world.item.ItemStack;
-import org.jspecify.annotations.Nullable;
-
-import java.util.ArrayList;
-import java.util.List;
-import java.util.Map;
-import java.util.concurrent.TimeUnit;
-import java.util.function.Function;
-
-/**
- * Combines several individual models together to form a turtle.
- *
- * @param <T> The type of the resulting "baked model".
- */
-public final class TurtleModelParts<T> {
-    private static final Transformation identity, flip;
-
-    static {
-        var stack = new PoseStack();
-        stack.translate(0.5f, 0.5f, 0.5f);
-        stack.scale(1, -1, 1);
-        stack.translate(-0.5f, -0.5f, -0.5f);
-
-        identity = Transformation.identity();
-        flip = new Transformation(stack.last().pose());
-    }
-
-    private record Combination(
-        boolean colour,
-        @Nullable UpgradeData<ITurtleUpgrade> leftUpgrade,
-        @Nullable UpgradeData<ITurtleUpgrade> rightUpgrade,
-        @Nullable TurtleOverlay overlay,
-        boolean christmas,
-        boolean flip
-    ) {
-    }
-
-    private final BakedModel familyModel;
-    private final BakedModel colourModel;
-    private final Function<TransformedModel, BakedModel> transformer;
-    private final Function<Combination, T> buildModel;
-
-    /**
-     * A cache of {@link TransformedModel} to the transformed {@link BakedModel}. This helps us pool the transformed
-     * instances, reducing memory usage and hopefully ensuring their caches are hit more often!
-     */
-    private final Map<TransformedModel, BakedModel> transformCache = CacheBuilder.newBuilder()
-        .concurrencyLevel(1)
-        .expireAfterAccess(30, TimeUnit.SECONDS)
-        .<TransformedModel, BakedModel>build()
-        .asMap();
-
-    /**
-     * A cache of {@link Combination}s to the combined model.
-     */
-    private final Map<Combination, T> modelCache = CacheBuilder.newBuilder()
-        .concurrencyLevel(1)
-        .expireAfterAccess(30, TimeUnit.SECONDS)
-        .<Combination, T>build()
-        .asMap();
-
-    public TurtleModelParts(BakedModel familyModel, BakedModel colourModel, ModelTransformer transformer, Function<List<BakedModel>, T> combineModel) {
-        this.familyModel = familyModel;
-        this.colourModel = colourModel;
-        this.transformer = x -> transformer.transform(x.model(), x.matrix());
-        buildModel = x -> combineModel.apply(buildModel(x));
-    }
-
-    public T getModel(ItemStack stack) {
-        var combination = getCombination(stack);
-        return modelCache.computeIfAbsent(combination, buildModel);
-    }
-
-    private Combination getCombination(ItemStack stack) {
-        var christmas = Holiday.getCurrent() == Holiday.CHRISTMAS;
-        var leftUpgrade = TurtleItem.getUpgradeWithData(stack, TurtleSide.LEFT);
-        var rightUpgrade = TurtleItem.getUpgradeWithData(stack, TurtleSide.RIGHT);
-        var overlay = TurtleItem.getOverlay(stack);
-        var label = DataComponentUtil.getCustomName(stack);
-        var flip = label != null && (label.equals("Dinnerbone") || label.equals("Grumm"));
-
-        return new Combination(stack.has(DataComponents.DYED_COLOR), leftUpgrade, rightUpgrade, overlay, christmas, flip);
-    }
-
-    private List<BakedModel> buildModel(Combination combo) {
-        var mc = Minecraft.getInstance();
-        var modelManager = mc.getItemRenderer().getItemModelShaper().getModelManager();
-
-        var transformation = combo.flip ? flip : identity;
-        var parts = new ArrayList<BakedModel>(4);
-        parts.add(transform(combo.colour() ? colourModel : familyModel, transformation));
-
-        if (combo.overlay() != null) addPart(parts, modelManager, transformation, combo.overlay().model());
-
-        var showChristmas = TurtleOverlay.showElfOverlay(combo.overlay(), combo.christmas());
-        if (showChristmas) addPart(parts, modelManager, transformation, TurtleOverlay.ELF_MODEL);
-
-        addUpgrade(parts, transformation, TurtleSide.LEFT, combo.leftUpgrade());
-        addUpgrade(parts, transformation, TurtleSide.RIGHT, combo.rightUpgrade());
-
-        return parts;
-    }
-
-    private void addPart(List<BakedModel> parts, ModelManager modelManager, Transformation transformation, ResourceLocation model) {
-        parts.add(transform(ClientPlatformHelper.get().getModel(modelManager, model), transformation));
-    }
-
-    private void addUpgrade(List<BakedModel> parts, Transformation transformation, TurtleSide side, @Nullable UpgradeData<ITurtleUpgrade> upgrade) {
-        if (upgrade == null) return;
-        var model = TurtleUpgradeModellers.getModel(upgrade.upgrade(), upgrade.data(), side);
-        parts.add(transform(model.model(), transformation.compose(model.matrix())));
-    }
-
-    private BakedModel transform(BakedModel model, Transformation transformation) {
-        if (transformation.equals(Transformation.identity())) return model;
-        return transformCache.computeIfAbsent(new TransformedModel(model, transformation), transformer);
-    }
-
-    public interface ModelTransformer {
-        BakedModel transform(BakedModel model, Transformation transformation);
-    }
-}

projects/common/src/client/java/dan200/computercraft/client/platform/ClientNetworkContextImpl.java

@@ -4,7 +4,6 @@
 
 package dan200.computercraft.client.platform;
 
-import com.google.auto.service.AutoService;
 import dan200.computercraft.client.ClientTableFormatter;
 import dan200.computercraft.client.gui.AbstractComputerScreen;
 import dan200.computercraft.client.gui.OptionScreen;
@@ -22,11 +21,13 @@ import dan200.computercraft.shared.peripheral.speaker.SpeakerPosition;
 import net.minecraft.client.Minecraft;
 import net.minecraft.core.BlockPos;
 import net.minecraft.core.Holder;
+import net.minecraft.core.registries.Registries;
 import net.minecraft.network.chat.Component;
 import net.minecraft.resources.ResourceLocation;
 import net.minecraft.world.entity.player.Player;
 import net.minecraft.world.item.JukeboxSong;
 import net.minecraft.world.level.Level;
+import net.minecraft.world.level.block.LevelEvent;
 import org.jspecify.annotations.Nullable;
 
 import java.util.UUID;
@@ -34,7 +35,6 @@ import java.util.UUID;
 /**
  * The client-side implementation of {@link ClientNetworkContext}.
  */
-@AutoService(ClientNetworkContext.class)
 public final class ClientNetworkContextImpl implements ClientNetworkContext {
     @Override
     public void handleChatTable(TableBuilder table) {
@@ -62,10 +62,14 @@ public final class ClientNetworkContextImpl implements ClientNetworkContext {
 
     @Override
     public void handlePlayRecord(BlockPos pos, @Nullable Holder<JukeboxSong> song) {
+        var level = Minecraft.getInstance().level;
+        if (level == null) return;
+
         if (song == null) {
-            Minecraft.getInstance().levelRenderer.stopJukeboxSongAndNotifyNearby(pos);
+            level.levelEvent(LevelEvent.SOUND_STOP_JUKEBOX_SONG, pos, 0);
         } else {
-            Minecraft.getInstance().levelRenderer.playJukeboxSong(song, pos);
+            var id = level.registryAccess().lookupOrThrow(Registries.JUKEBOX_SONG).getIdOrThrow(song.value());
+            level.levelEvent(LevelEvent.SOUND_PLAY_JUKEBOX_SONG, pos, id);
         }
     }
 

projects/common/src/client/java/dan200/computercraft/client/platform/ClientPlatformHelper.java

@@ -4,25 +4,38 @@
 
 package dan200.computercraft.client.platform;
 
-import com.mojang.blaze3d.vertex.PoseStack;
-import net.minecraft.client.renderer.MultiBufferSource;
-import net.minecraft.client.resources.model.BakedModel;
+import dan200.computercraft.impl.Services;
+import net.minecraft.client.resources.model.ModelDebugName;
+import org.jetbrains.annotations.Contract;
 import org.jspecify.annotations.Nullable;
 
-public interface ClientPlatformHelper extends dan200.computercraft.impl.client.ClientPlatformHelper {
+public interface ClientPlatformHelper {
     static ClientPlatformHelper get() {
-        return (ClientPlatformHelper) dan200.computercraft.impl.client.ClientPlatformHelper.get();
+        var instance = Instance.INSTANCE;
+        return instance == null ? Services.raise(ClientPlatformHelper.class, Instance.ERROR) : instance;
     }
 
     /**
-     * Render a {@link BakedModel}, using any loader-specific hooks.
+     * Create a new unique {@link ModelKey}.
      *
-     * @param transform     The current matrix transformation to apply.
-     * @param buffers       The current pool of render buffers.
-     * @param model         The model to draw.
-     * @param lightmapCoord The current packed lightmap coordinate.
-     * @param overlayLight  The current overlay light.
-     * @param tints         Block colour tints to apply to the model.
+     * @param name The debug name for this model key.
+     * @param <T>  The type of baked model.
+     * @return The newly created model key.
      */
-    void renderBakedModel(PoseStack transform, MultiBufferSource buffers, BakedModel model, int lightmapCoord, int overlayLight, int @Nullable [] tints);
+    @Contract("_ -> new")
+    <T> ModelKey<T> createModelKey(ModelDebugName name);
+
+    final class Instance {
+        static final @Nullable ClientPlatformHelper INSTANCE;
+        static final @Nullable Throwable ERROR;
+
+        static {
+            var helper = Services.tryLoad(ClientPlatformHelper.class);
+            INSTANCE = helper.instance();
+            ERROR = helper.error();
+        }
+
+        private Instance() {
+        }
+    }
 }

projects/common/src/client/java/dan200/computercraft/client/platform/ModelKey.java

@@ -0,0 +1,24 @@
+// SPDX-FileCopyrightText: 2025 The CC: Tweaked Developers
+//
+// SPDX-License-Identifier: MPL-2.0
+
+package dan200.computercraft.client.platform;
+
+import net.minecraft.client.resources.model.ModelManager;
+import org.jspecify.annotations.Nullable;
+
+/**
+ * A key used to identify extra/standalone models.
+ *
+ * @param <T> The type of baked model.
+ */
+public interface ModelKey<T> {
+    /**
+     * Lookup this model key in the model manager.
+     *
+     * @param manager The model manager.
+     * @return The loaded model, or {@code null} if not available.
+     */
+    @Nullable
+    T get(ModelManager manager);
+}

projects/common/src/client/java/dan200/computercraft/client/render/BlockOutlineRenderer.java

@@ -0,0 +1,47 @@
+// SPDX-FileCopyrightText: 2025 The CC: Tweaked Developers
+//
+// SPDX-License-Identifier: MPL-2.0
+
+package dan200.computercraft.client.render;
+
+import com.mojang.blaze3d.vertex.PoseStack;
+import com.mojang.blaze3d.vertex.VertexConsumer;
+import dan200.computercraft.client.ClientHooks;
+import net.minecraft.client.Camera;
+import net.minecraft.client.Minecraft;
+import net.minecraft.client.renderer.LevelRenderer;
+import net.minecraft.client.renderer.MultiBufferSource;
+import net.minecraft.client.renderer.RenderType;
+import net.minecraft.util.ARGB;
+import net.minecraft.util.CommonColors;
+import net.minecraft.world.phys.BlockHitResult;
+
+/**
+ * Utilities for rendering block outline.
+ *
+ * @see ClientHooks#drawHighlight(PoseStack, MultiBufferSource, Camera, BlockHitResult)
+ */
+public final class BlockOutlineRenderer {
+    private BlockOutlineRenderer() {
+    }
+
+    /**
+     * Render a block outline, handling both normal and high-contrast modes.
+     *
+     * @param bufferSource The buffer source.
+     * @param renderer     The function to render a highlight.
+     * @see LevelRenderer#renderBlockOutline(Camera, MultiBufferSource.BufferSource, PoseStack, boolean)
+     */
+    public static void render(MultiBufferSource bufferSource, Renderer renderer) {
+        var highContrast = Minecraft.getInstance().options.highContrastBlockOutline().get();
+        if (highContrast) renderer.render(bufferSource.getBuffer(RenderType.secondaryBlockOutline()), 0xff000000);
+
+        var colour = highContrast ? CommonColors.HIGH_CONTRAST_DIAMOND : ARGB.color(0x66, CommonColors.BLACK);
+        renderer.render(bufferSource.getBuffer(RenderType.lines()), colour);
+    }
+
+    @FunctionalInterface
+    public interface Renderer {
+        void render(VertexConsumer buffer, int colour);
+    }
+}

projects/common/src/client/java/dan200/computercraft/client/render/CableHighlightRenderer.java

@@ -11,8 +11,7 @@ import dan200.computercraft.shared.peripheral.modem.wired.CableShapes;
 import dan200.computercraft.shared.util.WorldUtil;
 import net.minecraft.client.Camera;
 import net.minecraft.client.renderer.MultiBufferSource;
-import net.minecraft.client.renderer.RenderType;
-import net.minecraft.util.Mth;
+import net.minecraft.client.renderer.ShapeRenderer;
 import net.minecraft.world.phys.BlockHitResult;
 
 public final class CableHighlightRenderer {
@@ -27,11 +26,10 @@ public final class CableHighlightRenderer {
      * @param camera       The current camera.
      * @param hit          The block hit result for the current player.
      * @return If we rendered a custom outline.
-     * @see net.minecraft.client.renderer.LevelRenderer#renderHitOutline
      */
     public static boolean drawHighlight(PoseStack transform, MultiBufferSource bufferSource, Camera camera, BlockHitResult hit) {
         var pos = hit.getBlockPos();
-        var world = camera.getEntity().getCommandSenderWorld();
+        var world = camera.getEntity().level();
 
         var state = world.getBlockState(pos);
 
@@ -49,27 +47,9 @@ public final class CableHighlightRenderer {
         var yOffset = pos.getY() - cameraPos.y();
         var zOffset = pos.getZ() - cameraPos.z();
 
-        var buffer = bufferSource.getBuffer(RenderType.lines());
-        var matrix4f = transform.last().pose();
-        // TODO: Can we just accesstransformer out LevelRenderer.renderShape?
-        shape.forAllEdges((x1, y1, z1, x2, y2, z2) -> {
-            var xDelta = (float) (x2 - x1);
-            var yDelta = (float) (y2 - y1);
-            var zDelta = (float) (z2 - z1);
-            var len = Mth.sqrt(xDelta * xDelta + yDelta * yDelta + zDelta * zDelta);
-            xDelta = xDelta / len;
-            yDelta = yDelta / len;
-            zDelta = zDelta / len;
-
-            buffer
-                .addVertex(matrix4f, (float) (x1 + xOffset), (float) (y1 + yOffset), (float) (z1 + zOffset))
-                .setColor(0, 0, 0, 0.4f)
-                .setNormal(transform.last(), xDelta, yDelta, zDelta);
-            buffer
-                .addVertex(matrix4f, (float) (x2 + xOffset), (float) (y2 + yOffset), (float) (z2 + zOffset))
-                .setColor(0, 0, 0, 0.4f)
-                .setNormal(transform.last(), xDelta, yDelta, zDelta);
-        });
+        BlockOutlineRenderer.render(
+            bufferSource, (buffer, colour) -> ShapeRenderer.renderShape(transform, buffer, shape, xOffset, yOffset, zOffset, colour)
+        );
 
         return true;
     }

projects/common/src/client/java/dan200/computercraft/client/render/ComputerBorderRenderer.java

@@ -1,17 +1,14 @@
-// Copyright Daniel Ratcliffe, 2011-2022. Do not distribute without permission.
+// SPDX-FileCopyrightText: 2025 The CC: Tweaked Developers
 //
-// SPDX-License-Identifier: LicenseRef-CCPL
+// SPDX-License-Identifier: MPL-2.0
 
 package dan200.computercraft.client.render;
 
-import dan200.computercraft.client.gui.GuiSprites;
-import net.minecraft.client.renderer.texture.TextureAtlasSprite;
-
-import static dan200.computercraft.client.render.SpriteRenderer.u;
-import static dan200.computercraft.client.render.SpriteRenderer.v;
+import dan200.computercraft.client.gui.ComputerScreen;
+import net.minecraft.client.resources.metadata.gui.GuiSpriteScaling;
 
 /**
- * Renders the borders of computers, either for a GUI ({@link dan200.computercraft.client.gui.ComputerScreen}) or
+ * Constants for the borders of computers, either for a {@linkplain ComputerScreen GUI} or
  * {@linkplain PocketItemRenderer in-hand pocket computers}.
  */
 public final class ComputerBorderRenderer {
@@ -21,55 +18,13 @@ public final class ComputerBorderRenderer {
     public static final int MARGIN = 2;
 
     /**
-     * The width of the terminal border.
+     * The size of the terminal border.
+     * <p>
+     * This is only used for layout of elements within UI. When rendering, the size of the computer's border is
+     * determined by its {@link GuiSpriteScaling}.
      */
     public static final int BORDER = 12;
 
-    public static final int LIGHT_HEIGHT = 8;
-
-    private static final int TEX_SIZE = 36;
-
     private ComputerBorderRenderer() {
     }
-
-    public static void render(SpriteRenderer renderer, GuiSprites.ComputerTextures textures, int x, int y, int width, int height, boolean withLight) {
-        var endX = x + width;
-        var endY = y + height;
-
-        var border = GuiSprites.get(textures.border());
-
-        // Top bar
-        blitBorder(renderer, border, x - BORDER, y - BORDER, 0, 0, BORDER, BORDER);
-        blitBorder(renderer, border, x, y - BORDER, BORDER, 0, width, BORDER);
-        blitBorder(renderer, border, endX, y - BORDER, BORDER * 2, 0, BORDER, BORDER);
-
-        // Vertical bars
-        blitBorder(renderer, border, x - BORDER, y, 0, BORDER, BORDER, height);
-        blitBorder(renderer, border, endX, y, BORDER * 2, BORDER, BORDER, height);
-
-        // Bottom bar. We allow for drawing a stretched version, which allows for additional elements (such as the
-        // pocket computer's lights).
-        if (withLight) {
-            var pocketBottomTexture = textures.pocketBottom();
-            if (pocketBottomTexture == null) throw new NullPointerException(textures + " has no pocket texture");
-            var pocketBottom = GuiSprites.get(pocketBottomTexture);
-
-            renderer.blitHorizontalSliced(
-                pocketBottom, x - BORDER, endY, width + BORDER * 2, BORDER + LIGHT_HEIGHT,
-                BORDER, BORDER, BORDER * 3
-            );
-        } else {
-            blitBorder(renderer, border, x - BORDER, endY, 0, BORDER * 2, BORDER, BORDER);
-            blitBorder(renderer, border, x, endY, BORDER, BORDER * 2, width, BORDER);
-            blitBorder(renderer, border, endX, endY, BORDER * 2, BORDER * 2, BORDER, BORDER);
-        }
-    }
-
-    private static void blitBorder(SpriteRenderer renderer, TextureAtlasSprite sprite, int x, int y, int u, int v, int width, int height) {
-        renderer.blit(
-            x, y, width, height,
-            u(sprite, u, TEX_SIZE), v(sprite, v, TEX_SIZE),
-            u(sprite, u + BORDER, TEX_SIZE), v(sprite, v + BORDER, TEX_SIZE)
-        );
-    }
 }

projects/common/src/client/java/dan200/computercraft/client/render/CustomLecternRenderer.java

@@ -6,26 +6,36 @@ package dan200.computercraft.client.render;
 
 import com.mojang.blaze3d.vertex.PoseStack;
 import com.mojang.math.Axis;
+import dan200.computercraft.client.model.LecternBookModel;
 import dan200.computercraft.client.model.LecternPocketModel;
 import dan200.computercraft.client.model.LecternPrintoutModel;
+import dan200.computercraft.client.model.LecternPrintoutModelDefinitions;
 import dan200.computercraft.client.pocket.ClientPocketComputers;
 import dan200.computercraft.client.render.text.FixedWidthFontRenderer;
 import dan200.computercraft.core.terminal.Terminal;
 import dan200.computercraft.core.util.Colour;
+import dan200.computercraft.shared.ModRegistry;
+import dan200.computercraft.shared.computer.core.ComputerFamily;
 import dan200.computercraft.shared.lectern.CustomLecternBlockEntity;
 import dan200.computercraft.shared.media.items.PrintoutData;
 import dan200.computercraft.shared.media.items.PrintoutItem;
 import dan200.computercraft.shared.pocket.items.PocketComputerItem;
-import net.minecraft.client.renderer.MultiBufferSource;
 import net.minecraft.client.renderer.RenderType;
-import net.minecraft.client.renderer.blockentity.BlockEntityRenderDispatcher;
+import net.minecraft.client.renderer.SubmitNodeCollector;
 import net.minecraft.client.renderer.blockentity.BlockEntityRenderer;
 import net.minecraft.client.renderer.blockentity.BlockEntityRendererProvider;
 import net.minecraft.client.renderer.blockentity.LecternRenderer;
-import net.minecraft.util.FastColor;
+import net.minecraft.client.renderer.blockentity.state.BlockEntityRenderState;
+import net.minecraft.client.renderer.feature.ModelFeatureRenderer;
+import net.minecraft.client.renderer.state.CameraRenderState;
+import net.minecraft.client.renderer.texture.OverlayTexture;
+import net.minecraft.client.resources.model.MaterialSet;
+import net.minecraft.util.ARGB;
+import net.minecraft.util.Unit;
 import net.minecraft.world.item.component.DyedItemColor;
 import net.minecraft.world.level.block.LecternBlock;
 import net.minecraft.world.phys.Vec3;
+import org.jspecify.annotations.Nullable;
 
 import static dan200.computercraft.client.render.ComputerBorderRenderer.MARGIN;
 import static dan200.computercraft.client.render.text.FixedWidthFontRenderer.FONT_HEIGHT;
@@ -36,63 +46,89 @@ import static dan200.computercraft.client.render.text.FixedWidthFontRenderer.FON
  * <p>
  * This largely follows {@link LecternRenderer}, but with support for multiple types of item.
  */
-public class CustomLecternRenderer implements BlockEntityRenderer<CustomLecternBlockEntity> {
+public class CustomLecternRenderer implements BlockEntityRenderer<CustomLecternBlockEntity, CustomLecternRenderer.State> {
     private static final int POCKET_TERMINAL_RENDER_DISTANCE = 32;
 
-    private final BlockEntityRenderDispatcher berDispatcher;
+    private final MaterialSet materials;
     private final LecternPrintoutModel printoutModel;
+    private final LecternBookModel bookModel;
     private final LecternPocketModel pocketModel;
 
     public CustomLecternRenderer(BlockEntityRendererProvider.Context context) {
-        berDispatcher = context.getBlockEntityRenderDispatcher();
-
-        printoutModel = new LecternPrintoutModel();
-        pocketModel = new LecternPocketModel();
+        materials = context.materials();
+        bookModel = new LecternBookModel(context.bakeLayer(LecternBookModel.LAYER));
+        printoutModel = new LecternPrintoutModel(context.bakeLayer(LecternPrintoutModel.LAYER));
+        pocketModel = new LecternPocketModel(context.bakeLayer(LecternPocketModel.LAYER));
     }
 
     @Override
-    public void render(CustomLecternBlockEntity lectern, float partialTick, PoseStack poseStack, MultiBufferSource buffer, int packedLight, int packedOverlay) {
+    public State createRenderState() {
+        return new State();
+    }
+
+    @Override
+    public void extractRenderState(CustomLecternBlockEntity lectern, State state, float f, Vec3 camera, ModelFeatureRenderer.@Nullable CrumblingOverlay overlay) {
+        BlockEntityRenderer.super.extractRenderState(lectern, state, f, camera, overlay);
+
+        var item = lectern.getItem();
+        if (item.getItem() instanceof PrintoutItem) {
+            state.setPrintout(item.is(ModRegistry.Items.PRINTED_BOOK.get()), PrintoutData.getOrEmpty(item).pages());
+        } else if (item.getItem() instanceof PocketComputerItem pocket) {
+            var computer = ClientPocketComputers.get(item);
+            state.setPocket(
+                pocket.getFamily(), DyedItemColor.getOrDefault(item, -1),
+                ARGB.opaque(computer == null || computer.getLightState() == -1 ? Colour.BLACK.getHex() : computer.getLightState()),
+                // Only render a terminal if we're close to it.
+                computer == null || !Vec3.atCenterOf(lectern.getBlockPos()).closerThan(camera, POCKET_TERMINAL_RENDER_DISTANCE)
+                    ? null : computer.getTerminal()
+            );
+        } else {
+            state.setUnknown();
+        }
+    }
+
+    @Override
+    public void submit(State state, PoseStack poseStack, SubmitNodeCollector collector, CameraRenderState cameraRenderState) {
         poseStack.pushPose();
         poseStack.translate(0.5f, 1.0625f, 0.5f);
-        poseStack.mulPose(Axis.YP.rotationDegrees(-lectern.getBlockState().getValue(LecternBlock.FACING).getClockWise().toYRot()));
+        poseStack.mulPose(Axis.YP.rotationDegrees(-state.blockState.getValue(LecternBlock.FACING).getClockWise().toYRot()));
         poseStack.mulPose(Axis.ZP.rotationDegrees(67.5f));
         poseStack.translate(0, -0.125f, 0);
 
-        var item = lectern.getItem();
-        if (item.getItem() instanceof PrintoutItem printout) {
-            var vertexConsumer = LecternPrintoutModel.MATERIAL.buffer(buffer, RenderType::entitySolid);
-            if (printout.getType() == PrintoutItem.Type.BOOK) {
-                printoutModel.renderBook(poseStack, vertexConsumer, packedLight, packedOverlay);
+        if (state.type == Type.PRINTOUT) {
+            if (state.isBook) {
+                collector.submitModel(
+                    bookModel, Unit.INSTANCE, poseStack, LecternPrintoutModelDefinitions.MATERIAL.renderType(RenderType::entitySolid),
+                    state.lightCoords, OverlayTexture.NO_OVERLAY, -1,
+                    materials.get(LecternPrintoutModelDefinitions.MATERIAL), 0, null
+                );
             } else {
-                printoutModel.renderPages(poseStack, vertexConsumer, packedLight, packedOverlay, PrintoutData.getOrEmpty(item).pages());
+                collector.submitModel(
+                    printoutModel, state.printoutState, poseStack, LecternPrintoutModelDefinitions.MATERIAL.renderType(RenderType::entitySolid),
+                    state.lightCoords, OverlayTexture.NO_OVERLAY, -1,
+                    materials.get(LecternPrintoutModelDefinitions.MATERIAL), 0, null
+                );
             }
-        } else if (item.getItem() instanceof PocketComputerItem pocket) {
-            var computer = ClientPocketComputers.get(item);
-
-            pocketModel.render(
-                poseStack, buffer, packedLight, packedOverlay, pocket.getFamily(), DyedItemColor.getOrDefault(item, -1),
-                FastColor.ARGB32.opaque(computer == null || computer.getLightState() == -1 ? Colour.BLACK.getHex() : computer.getLightState())
-            );
+        } else if (state.type == Type.POCKET_COMPUTER) {
+            pocketModel.submit(poseStack, collector, materials, state.lightCoords, state.pocketFamily, state.pocketColour, state.pocketLight);
 
             // Jiggle the terminal about a bit, so (0, 0) is in the top left of the model's terminal hole.
             poseStack.mulPose(Axis.YP.rotationDegrees(90f));
             poseStack.translate(-0.5 * LecternPocketModel.TERM_WIDTH, 0.5 * LecternPocketModel.TERM_HEIGHT + 1f / 32.0f, 1 / 16.0f);
             poseStack.mulPose(Axis.XP.rotationDegrees(180));
 
-            // Either render the terminal or a black screen, depending on how close we are.
-            var terminal = computer == null ? null : computer.getTerminal();
-            var quadEmitter = FixedWidthFontRenderer.toVertexConsumer(poseStack, buffer.getBuffer(RenderTypes.TERMINAL));
-            if (terminal != null && Vec3.atCenterOf(lectern.getBlockPos()).closerThan(berDispatcher.camera.getPosition(), POCKET_TERMINAL_RENDER_DISTANCE)) {
-                renderPocketTerminal(poseStack, quadEmitter, terminal);
+            // Either render the terminal or a black screen.
+            if (state.pocketTerminal != null) {
+                renderPocketTerminal(poseStack, collector, state.pocketTerminal);
             } else {
-                FixedWidthFontRenderer.drawEmptyTerminal(quadEmitter, 0, 0, LecternPocketModel.TERM_WIDTH, LecternPocketModel.TERM_HEIGHT);
+                FixedWidthFontRenderer.drawEmptyTerminal(poseStack, collector, 0, 0, LecternPocketModel.TERM_WIDTH, LecternPocketModel.TERM_HEIGHT);
             }
         }
 
         poseStack.popPose();
     }
 
-    private static void renderPocketTerminal(PoseStack poseStack, FixedWidthFontRenderer.QuadEmitter quadEmitter, Terminal terminal) {
+    private static void renderPocketTerminal(PoseStack poseStack, SubmitNodeCollector collector, Terminal terminal) {
         var width = terminal.getWidth() * FONT_WIDTH;
         var height = terminal.getHeight() * FONT_HEIGHT;
 
@@ -106,6 +142,48 @@ public class CustomLecternRenderer implements BlockEntityRenderer<CustomLecternB
         var marginX = ((LecternPocketModel.TERM_WIDTH / scale) - width) / 2;
         var marginY = ((LecternPocketModel.TERM_HEIGHT / scale) - height) / 2;
 
-        FixedWidthFontRenderer.drawTerminal(quadEmitter, marginX, marginY, terminal, marginY, marginY, marginX, marginX);
+        collector.submitCustomGeometry(poseStack, FixedWidthFontRenderer.TERMINAL_TEXT, (pose, buffer) ->
+            FixedWidthFontRenderer.drawTerminal(pose.pose(), buffer, marginX, marginY, terminal, marginY, marginY, marginX, marginX));
+    }
+
+    private enum Type {
+        PRINTOUT,
+        POCKET_COMPUTER,
+        UNKNOWN,
+    }
+
+    public static final class State extends BlockEntityRenderState {
+        private Type type = Type.PRINTOUT;
+        private boolean isBook;
+        private final LecternPrintoutModel.State printoutState = new LecternPrintoutModel.State();
+
+        private ComputerFamily pocketFamily = ComputerFamily.NORMAL;
+        private int pocketColour;
+        private int pocketLight;
+        private @Nullable Terminal pocketTerminal; // TODO: Make this immutable
+
+        private State() {
+        }
+
+        private void setUnknown() {
+            this.type = Type.UNKNOWN;
+            this.pocketTerminal = null;
+        }
+
+        private void setPrintout(boolean isBook, int pages) {
+            this.type = Type.PRINTOUT;
+            this.isBook = isBook;
+            this.printoutState.pages = pages;
+
+            this.pocketTerminal = null;
+        }
+
+        private void setPocket(ComputerFamily family, int colour, int light, @Nullable Terminal terminal) {
+            this.type = Type.POCKET_COMPUTER;
+            this.pocketFamily = family;
+            this.pocketColour = colour;
+            this.pocketLight = light;
+            this.pocketTerminal = terminal;
+        }
     }
 }

projects/common/src/client/java/dan200/computercraft/client/render/ExtendedItemFrameRenderState.java

@@ -0,0 +1,40 @@
+// SPDX-FileCopyrightText: 2025 The CC: Tweaked Developers
+//
+// SPDX-License-Identifier: MPL-2.0
+
+package dan200.computercraft.client.render;
+
+import com.mojang.blaze3d.vertex.PoseStack;
+import dan200.computercraft.shared.ModRegistry;
+import dan200.computercraft.shared.media.items.PrintoutData;
+import dan200.computercraft.shared.media.items.PrintoutItem;
+import net.minecraft.client.renderer.MultiBufferSource;
+import net.minecraft.client.renderer.entity.state.ItemFrameRenderState;
+import net.minecraft.world.entity.decoration.ItemFrame;
+import net.minecraft.world.item.ItemStack;
+import org.jspecify.annotations.Nullable;
+
+/**
+ * Additional render state attached to a {@link ItemFrameRenderState}.
+ *
+ * @see dan200.computercraft.client.ClientHooks#onRenderItemFrame(PoseStack, MultiBufferSource, ItemFrameRenderState, ExtendedItemFrameRenderState, int)
+ */
+public class ExtendedItemFrameRenderState {
+    public @Nullable PrintoutData printoutData;
+    public boolean isBook;
+
+    /**
+     * Set up the render state from the {@link ItemFrame}'s {@link ItemStack}.
+     *
+     * @param stack The item frame's item.
+     */
+    public void setup(ItemStack stack) {
+        if (stack.getItem() instanceof PrintoutItem) {
+            printoutData = PrintoutData.getOrEmpty(stack);
+            isBook = stack.getItem() == ModRegistry.Items.PRINTED_BOOK.get();
+        } else {
+            printoutData = null;
+            isBook = false;
+        }
+    }
+}

projects/common/src/client/java/dan200/computercraft/client/render/ItemMapLikeRenderer.java

@@ -8,7 +8,7 @@ import com.mojang.blaze3d.vertex.PoseStack;
 import com.mojang.math.Axis;
 import net.minecraft.client.Minecraft;
 import net.minecraft.client.renderer.ItemInHandRenderer;
-import net.minecraft.client.renderer.MultiBufferSource;
+import net.minecraft.client.renderer.SubmitNodeCollector;
 import net.minecraft.util.Mth;
 import net.minecraft.world.InteractionHand;
 import net.minecraft.world.entity.HumanoidArm;
@@ -22,29 +22,29 @@ import java.util.Objects;
 /**
  * A base class for items which have map-like rendering when held in the hand.
  *
- * @see dan200.computercraft.client.ClientHooks#onRenderHeldItem(PoseStack, MultiBufferSource, int, InteractionHand, float, float, float, ItemStack)
+ * @see dan200.computercraft.client.ClientHooks#onRenderHeldItem(PoseStack, SubmitNodeCollector, int, InteractionHand, float, float, float, ItemStack)
  */
 public abstract class ItemMapLikeRenderer {
     /**
      * The main rendering method for the item.
      *
      * @param transform The matrix transformation stack
-     * @param render    The buffer to render to
+     * @param collector The buffer to render to
      * @param stack     The stack to render
      * @param light     The packed lightmap coordinates.
-     * @see ItemInHandRenderer#renderItem(LivingEntity, ItemStack, ItemDisplayContext, boolean, PoseStack, MultiBufferSource, int)
+     * @see ItemInHandRenderer#renderItem(LivingEntity, ItemStack, ItemDisplayContext, PoseStack, SubmitNodeCollector, int)
      */
-    protected abstract void renderItem(PoseStack transform, MultiBufferSource render, ItemStack stack, int light);
+    protected abstract void renderItem(PoseStack transform, SubmitNodeCollector collector, ItemStack stack, int light);
 
-    public void renderItemFirstPerson(PoseStack transform, MultiBufferSource render, int lightTexture, InteractionHand hand, float pitch, float equipProgress, float swingProgress, ItemStack stack) {
+    public void renderItemFirstPerson(PoseStack transform, SubmitNodeCollector collector, int lightTexture, InteractionHand hand, float pitch, float equipProgress, float swingProgress, ItemStack stack) {
         Player player = Objects.requireNonNull(Minecraft.getInstance().player);
 
         transform.pushPose();
         if (hand == InteractionHand.MAIN_HAND && player.getOffhandItem().isEmpty()) {
-            renderItemFirstPersonCenter(transform, render, lightTexture, pitch, equipProgress, swingProgress, stack);
+            renderItemFirstPersonCenter(transform, collector, lightTexture, pitch, equipProgress, swingProgress, stack);
         } else {
             renderItemFirstPersonSide(
-                transform, render, lightTexture,
+                transform, collector, lightTexture,
                 hand == InteractionHand.MAIN_HAND ? player.getMainArm() : player.getMainArm().getOpposite(),
                 equipProgress, swingProgress, stack
             );
@@ -56,15 +56,15 @@ public abstract class ItemMapLikeRenderer {
      * Renders the item to one side of the player.
      *
      * @param transform     The matrix transformation stack
-     * @param render        The buffer to render to
+     * @param collector     The buffer to render to
      * @param combinedLight The current light level
      * @param side          The side to render on
      * @param equipProgress The equip progress of this item
      * @param swingProgress The swing progress of this item
      * @param stack         The stack to render
-     * @see ItemInHandRenderer#renderOneHandedMap(PoseStack, MultiBufferSource, int, float, HumanoidArm, float, ItemStack)
+     * @see ItemInHandRenderer#renderOneHandedMap(PoseStack, SubmitNodeCollector, int, float, HumanoidArm, float, ItemStack)
      */
-    private void renderItemFirstPersonSide(PoseStack transform, MultiBufferSource render, int combinedLight, HumanoidArm side, float equipProgress, float swingProgress, ItemStack stack) {
+    private void renderItemFirstPersonSide(PoseStack transform, SubmitNodeCollector collector, int combinedLight, HumanoidArm side, float equipProgress, float swingProgress, ItemStack stack) {
         var minecraft = Minecraft.getInstance();
         var offset = side == HumanoidArm.RIGHT ? 1f : -1f;
         transform.translate(offset * 0.125f, -0.125f, 0f);
@@ -73,7 +73,7 @@ public abstract class ItemMapLikeRenderer {
         if (!minecraft.player.isInvisible()) {
             transform.pushPose();
             transform.mulPose(Axis.ZP.rotationDegrees(offset * 10f));
-            minecraft.getEntityRenderDispatcher().getItemInHandRenderer().renderPlayerArm(transform, render, combinedLight, equipProgress, swingProgress, side);
+            minecraft.getEntityRenderDispatcher().getItemInHandRenderer().renderPlayerArm(transform, collector, combinedLight, equipProgress, swingProgress, side);
             transform.popPose();
         }
 
@@ -90,7 +90,7 @@ public abstract class ItemMapLikeRenderer {
         transform.mulPose(Axis.XP.rotationDegrees(f2 * -45f));
         transform.mulPose(Axis.YP.rotationDegrees(offset * f2 * -30f));
 
-        renderItem(transform, render, stack, combinedLight);
+        renderItem(transform, collector, stack, combinedLight);
 
         transform.popPose();
     }
@@ -99,15 +99,15 @@ public abstract class ItemMapLikeRenderer {
      * Render an item in the middle of the screen.
      *
      * @param transform     The matrix transformation stack
-     * @param render        The buffer to render to
+     * @param collector     The buffer to render to
      * @param combinedLight The current light level
      * @param pitch         The pitch of the player
      * @param equipProgress The equip progress of this item
      * @param swingProgress The swing progress of this item
      * @param stack         The stack to render
-     * @see ItemInHandRenderer#renderTwoHandedMap(PoseStack, MultiBufferSource, int, float, float, float)
+     * @see ItemInHandRenderer#renderTwoHandedMap(PoseStack, SubmitNodeCollector, int, float, float, float)
      */
-    private void renderItemFirstPersonCenter(PoseStack transform, MultiBufferSource render, int combinedLight, float pitch, float equipProgress, float swingProgress, ItemStack stack) {
+    private void renderItemFirstPersonCenter(PoseStack transform, SubmitNodeCollector collector, int combinedLight, float pitch, float equipProgress, float swingProgress, ItemStack stack) {
         var minecraft = Minecraft.getInstance();
         var renderer = minecraft.getEntityRenderDispatcher().getItemInHandRenderer();
 
@@ -124,8 +124,8 @@ public abstract class ItemMapLikeRenderer {
         if (!minecraft.player.isInvisible()) {
             transform.pushPose();
             transform.mulPose(Axis.YP.rotationDegrees(90.0F));
-            renderer.renderMapHand(transform, render, combinedLight, HumanoidArm.RIGHT);
-            renderer.renderMapHand(transform, render, combinedLight, HumanoidArm.LEFT);
+            renderer.renderMapHand(transform, collector, combinedLight, HumanoidArm.RIGHT);
+            renderer.renderMapHand(transform, collector, combinedLight, HumanoidArm.LEFT);
             transform.popPose();
         }
 
@@ -133,6 +133,6 @@ public abstract class ItemMapLikeRenderer {
         transform.mulPose(Axis.XP.rotationDegrees(rX * 20.0F));
         transform.scale(2.0F, 2.0F, 2.0F);
 
-        renderItem(transform, render, stack, combinedLight);
+        renderItem(transform, collector, stack, combinedLight);
     }
 }

projects/common/src/client/java/dan200/computercraft/client/render/ModelRenderer.java

@@ -1,98 +0,0 @@
-// SPDX-FileCopyrightText: 2023 The CC: Tweaked Developers
-//
-// SPDX-License-Identifier: MPL-2.0
-
-package dan200.computercraft.client.render;
-
-import com.mojang.blaze3d.vertex.PoseStack;
-import com.mojang.blaze3d.vertex.VertexConsumer;
-import dan200.computercraft.client.model.turtle.ModelTransformer;
-import dan200.computercraft.client.platform.ClientPlatformHelper;
-import net.minecraft.client.renderer.MultiBufferSource;
-import net.minecraft.client.renderer.block.model.BakedQuad;
-import net.minecraft.client.renderer.entity.ItemRenderer;
-import net.minecraft.client.resources.model.BakedModel;
-import net.minecraft.world.item.ItemStack;
-import org.joml.Vector4f;
-import org.jspecify.annotations.Nullable;
-
-import java.util.List;
-
-/**
- * Utilities for rendering {@link BakedModel}s and {@link BakedQuad}s.
- */
-public final class ModelRenderer {
-    private ModelRenderer() {
-    }
-
-    /**
-     * Render a list of {@linkplain BakedQuad quads} to a buffer.
-     * <p>
-     * This is not intended to be used directly, but instead by {@link ClientPlatformHelper#renderBakedModel(PoseStack, MultiBufferSource, BakedModel, int, int, int[])}. The
-     * implementation here is pretty similar to {@link ItemRenderer#renderQuadList(PoseStack, VertexConsumer, List, ItemStack, int, int)},
-     * but supports inverted quads (i.e. those with a negative scale).
-     *
-     * @param transform     The current matrix transformation to apply.
-     * @param buffer        The buffer to draw to.
-     * @param quads         The quads to draw.
-     * @param lightmapCoord The current packed lightmap coordinate.
-     * @param overlayLight  The current overlay light.
-     * @param tints         Block colour tints to apply to the model.
-     */
-    public static void renderQuads(PoseStack transform, VertexConsumer buffer, List<BakedQuad> quads, int lightmapCoord, int overlayLight, int @Nullable [] tints) {
-        var matrix = transform.last();
-        var inverted = matrix.pose().determinant() < 0;
-
-        for (var bakedquad : quads) {
-            var tint = -1;
-            if (tints != null && bakedquad.isTinted()) {
-                var idx = bakedquad.getTintIndex();
-                if (idx >= 0 && idx < tints.length) tint = tints[bakedquad.getTintIndex()];
-            }
-
-            putBulkQuad(buffer, matrix, bakedquad, tint, lightmapCoord, overlayLight, inverted);
-        }
-    }
-
-    /**
-     * A version of {@link VertexConsumer#putBulkData(PoseStack.Pose, BakedQuad, float, float, float, float, int, int)} which
-     * will reverse vertex order when the matrix is inverted.
-     *
-     * @param buffer        The buffer to draw to.
-     * @param pose          The current matrix stack.
-     * @param quad          The quad to draw.
-     * @param colour        The tint for this quad.
-     * @param lightmapCoord The lightmap coordinate
-     * @param overlayLight  The overlay light.
-     * @param invert        Whether to reverse the order of this quad.
-     */
-    private static void putBulkQuad(VertexConsumer buffer, PoseStack.Pose pose, BakedQuad quad, int colour, int lightmapCoord, int overlayLight, boolean invert) {
-        var matrix = pose.pose();
-        // It's a little dubious to transform using this matrix rather than the normal matrix. This mirrors the logic in
-        // Direction.rotate (so not out of nowhere!), but is a little suspicious.
-        var dirNormal = quad.getDirection().getNormal();
-        var vector = new Vector4f();
-
-        matrix.transform(dirNormal.getX(), dirNormal.getY(), dirNormal.getZ(), 0.0f, vector).normalize();
-        float normalX = vector.x(), normalY = vector.y(), normalZ = vector.z();
-
-        var vertices = quad.getVertices();
-        for (var vertex = 0; vertex < 4; vertex++) {
-            var i = ModelTransformer.getVertexOffset(vertex, invert);
-
-            var x = Float.intBitsToFloat(vertices[i]);
-            var y = Float.intBitsToFloat(vertices[i + 1]);
-            var z = Float.intBitsToFloat(vertices[i + 2]);
-
-            matrix.transform(x, y, z, 1, vector);
-
-            var u = Float.intBitsToFloat(vertices[i + 4]);
-            var v = Float.intBitsToFloat(vertices[i + 5]);
-            buffer.addVertex(
-                vector.x(), vector.y(), vector.z(),
-                colour, u, v, overlayLight, lightmapCoord,
-                normalX, normalY, normalZ
-            );
-        }
-    }
-}

projects/common/src/client/java/dan200/computercraft/client/render/PocketItemRenderer.java

@@ -13,13 +13,19 @@ import dan200.computercraft.core.util.Colour;
 import dan200.computercraft.shared.computer.core.ComputerFamily;
 import dan200.computercraft.shared.config.Config;
 import dan200.computercraft.shared.pocket.items.PocketComputerItem;
-import net.minecraft.client.renderer.MultiBufferSource;
-import net.minecraft.util.FastColor;
+import net.minecraft.client.Minecraft;
+import net.minecraft.client.renderer.LightTexture;
+import net.minecraft.client.renderer.SubmitNodeCollector;
+import net.minecraft.client.renderer.texture.TextureAtlasSprite;
+import net.minecraft.client.resources.metadata.gui.GuiMetadataSection;
+import net.minecraft.client.resources.metadata.gui.GuiSpriteScaling;
+import net.minecraft.data.AtlasIds;
+import net.minecraft.util.ARGB;
 import net.minecraft.world.item.ItemStack;
 import net.minecraft.world.item.component.DyedItemColor;
-import org.joml.Matrix4f;
 
-import static dan200.computercraft.client.render.ComputerBorderRenderer.*;
+import static dan200.computercraft.client.render.ComputerBorderRenderer.BORDER;
+import static dan200.computercraft.client.render.ComputerBorderRenderer.MARGIN;
 import static dan200.computercraft.client.render.text.FixedWidthFontRenderer.FONT_HEIGHT;
 import static dan200.computercraft.client.render.text.FixedWidthFontRenderer.FONT_WIDTH;
 
@@ -29,11 +35,16 @@ import static dan200.computercraft.client.render.text.FixedWidthFontRenderer.FON
 public final class PocketItemRenderer extends ItemMapLikeRenderer {
     public static final PocketItemRenderer INSTANCE = new PocketItemRenderer();
 
+    /**
+     * The height of the pocket computer's light.
+     */
+    private static final int LIGHT_HEIGHT = 8;
+
     private PocketItemRenderer() {
     }
 
     @Override
-    protected void renderItem(PoseStack transform, MultiBufferSource bufferSource, ItemStack stack, int light) {
+    protected void renderItem(PoseStack transform, SubmitNodeCollector collector, ItemStack stack, int light) {
         var computer = ClientPocketComputers.get(stack);
         var terminal = computer == null ? null : computer.getTerminal();
 
@@ -65,40 +76,109 @@ public final class PocketItemRenderer extends ItemMapLikeRenderer {
         var family = item.getFamily();
         var frameColour = DyedItemColor.getOrDefault(stack, -1);
 
-        var matrix = transform.last().pose();
-        renderFrame(matrix, bufferSource, family, frameColour, light, width, height);
+        renderFrame(transform, collector, family, frameColour, light, width, height);
 
         // Render the light
         var lightColour = computer == null || computer.getLightState() == -1 ? Colour.BLACK.getHex() : computer.getLightState();
-        renderLight(transform, bufferSource, lightColour, width, height);
+        renderLight(transform, collector, lightColour, width, height);
 
-        var quadEmitter = FixedWidthFontRenderer.toVertexConsumer(transform, bufferSource.getBuffer(RenderTypes.TERMINAL));
         if (terminal == null) {
-            FixedWidthFontRenderer.drawEmptyTerminal(quadEmitter, 0, 0, width, height);
+            FixedWidthFontRenderer.drawEmptyTerminal(transform, collector, 0, 0, width, height);
         } else {
-            FixedWidthFontRenderer.drawTerminal(quadEmitter, MARGIN, MARGIN, terminal, MARGIN, MARGIN, MARGIN, MARGIN);
+            collector.submitCustomGeometry(transform, FixedWidthFontRenderer.TERMINAL_TEXT, (pose, buffer) ->
+                FixedWidthFontRenderer.drawTerminal(pose.pose(), buffer, MARGIN, MARGIN, terminal, MARGIN, MARGIN, MARGIN, MARGIN));
         }
 
         transform.popPose();
     }
 
-    private static void renderFrame(Matrix4f transform, MultiBufferSource render, ComputerFamily family, int colour, int light, int width, int height) {
-        var texture = colour != -1 ? GuiSprites.COMPUTER_COLOUR : GuiSprites.getComputerTextures(family);
-
-        var r = (colour >>> 16) & 0xFF;
-        var g = (colour >>> 8) & 0xFF;
-        var b = colour & 0xFF;
-
-        var spriteRenderer = new SpriteRenderer(transform, render.getBuffer(RenderTypes.GUI_SPRITES), 0, light, r, g, b);
-        ComputerBorderRenderer.render(spriteRenderer, texture, 0, 0, width, height, true);
+    private static void renderFrame(PoseStack transform, SubmitNodeCollector submit, ComputerFamily family, int colour, int light, int width, int height) {
+        var textures = colour != -1 ? GuiSprites.COMPUTER_COLOUR : GuiSprites.getComputerTextures(family);
+        var spriteRenderer = new SpriteRenderer(transform, submit, 0, light, colour);
+        renderBorder(spriteRenderer, textures, width, height);
     }
 
-    private static void renderLight(PoseStack transform, MultiBufferSource render, int colour, int width, int height) {
-        var buffer = render.getBuffer(RenderTypes.TERMINAL);
-        FixedWidthFontRenderer.drawQuad(
-            FixedWidthFontRenderer.toVertexConsumer(transform, buffer),
-            width - LIGHT_HEIGHT * 2, height + BORDER / 2.0f, 0.001f, LIGHT_HEIGHT * 2, LIGHT_HEIGHT,
-            FastColor.ARGB32.opaque(colour), RenderTypes.FULL_BRIGHT_LIGHTMAP
+    private static void renderBorder(SpriteRenderer renderer, GuiSprites.ComputerTextures textures, int width, int height) {
+        var sprites = Minecraft.getInstance().getAtlasManager().getAtlasOrThrow(AtlasIds.GUI);
+
+        // Find our border, forcing it to be a nine-sliced texture.
+        var borderSprite = sprites.getSprite(textures.border());
+        var borderSlice = getSlice(borderSprite, DEFAULT_BORDER);
+        var borderBounds = borderSlice.border();
+
+        // And take the separate bottom bit of the pocket computer.
+        var bottomTexture = textures.pocketBottom();
+        if (bottomTexture == null) throw new NullPointerException(textures + " has no pocket texture");
+        var bottomSprite = sprites.getSprite(bottomTexture);
+        var bottomSlice = getSlice(bottomSprite, DEFAULT_BOTTOM);
+        var bottomBounds = bottomSlice.border();
+
+        // Now draw a nine-sliced texture, by stitching together the top parts of the border with the pocket bottom.
+
+        // Top bar
+        renderer.blit(
+            borderSprite, -borderBounds.left(), -borderBounds.top(), borderBounds.left(), borderBounds.top(),
+            0, 0, borderSlice.width(), borderSlice.height()
+        );
+        renderer.blitTiled(
+            borderSprite, 0, -borderBounds.top(), width, borderBounds.top(),
+            borderBounds.left(), 0, borderSlice.width() - borderBounds.left() - borderBounds.right(), borderBounds.top(),
+            borderSlice.width(), borderSlice.height()
+        );
+        renderer.blit(
+            borderSprite, width, -borderBounds.top(), borderBounds.right(), borderBounds.top(),
+            borderSlice.width() - borderBounds.right(), 0, borderSlice.width(), borderSlice.height()
+        );
+
+        // Vertical bars
+        renderer.blitTiled(
+            borderSprite, -borderBounds.left(), 0, borderBounds.left(), height,
+            0, borderBounds.top(), borderBounds.left(), borderSlice.height() - borderBounds.top() - borderBounds.bottom(),
+            borderSlice.width(), borderSlice.height()
+        );
+        renderer.blitTiled(
+            borderSprite, width, 0, borderBounds.right(), height,
+            borderSlice.width() - borderBounds.right(), borderBounds.top(), borderBounds.right(), borderSlice.height() - borderBounds.top() - borderBounds.bottom(),
+            borderSlice.width(), borderSlice.height()
+        );
+
+        // Bottom
+        renderer.blit(
+            bottomSprite, -bottomBounds.left(), height, bottomBounds.left(), bottomSlice.height(),
+            0, 0, bottomSlice.width(), bottomSlice.height()
+        );
+        renderer.blitTiled(
+            bottomSprite, 0, height, width, bottomSlice.height(),
+            bottomBounds.left(), 0, bottomSlice.width() - bottomBounds.left() - bottomBounds.right(), bottomSlice.height(),
+            bottomSlice.width(), bottomSlice.height()
+        );
+        renderer.blit(
+            bottomSprite, width, height, bottomBounds.right(), bottomSlice.height(),
+            bottomSlice.width() - bottomBounds.right(), 0, bottomSlice.width(), bottomSlice.height()
         );
     }
+
+    private static void renderLight(PoseStack transform, SubmitNodeCollector render, int colour, int width, int height) {
+        render.submitCustomGeometry(transform, FixedWidthFontRenderer.TERMINAL_TEXT, (pose, buffer) -> FixedWidthFontRenderer.drawQuad(
+            pose.pose(), buffer,
+            width - LIGHT_HEIGHT * 2, height + BORDER / 2.0f, 0.001f, LIGHT_HEIGHT * 2, LIGHT_HEIGHT,
+            ARGB.opaque(colour), LightTexture.FULL_BRIGHT
+        ));
+    }
+
+    private static final GuiSpriteScaling.NineSlice DEFAULT_BORDER = new GuiSpriteScaling.NineSlice(
+        36, 36, new GuiSpriteScaling.NineSlice.Border(12, 12, 12, 12), false
+    );
+
+    private static final GuiSpriteScaling.NineSlice DEFAULT_BOTTOM = new GuiSpriteScaling.NineSlice(
+        36, 20, new GuiSpriteScaling.NineSlice.Border(12, 0, 12, 0), false
+    );
+
+    private static GuiSpriteScaling.NineSlice getSlice(GuiSpriteScaling scaling, GuiSpriteScaling.NineSlice fallback) {
+        return scaling instanceof GuiSpriteScaling.NineSlice slice ? slice : fallback;
+    }
+
+    private static GuiSpriteScaling.NineSlice getSlice(TextureAtlasSprite sprite, GuiSpriteScaling.NineSlice fallback) {
+        return getSlice(sprite.contents().getAdditionalMetadata(GuiMetadataSection.TYPE).orElse(GuiMetadataSection.DEFAULT).scaling(), fallback);
+    }
 }

projects/common/src/client/java/dan200/computercraft/client/render/PrintoutItemRenderer.java

@@ -6,12 +6,11 @@ package dan200.computercraft.client.render;
 
 import com.mojang.blaze3d.vertex.PoseStack;
 import com.mojang.math.Axis;
+import dan200.computercraft.client.render.text.FixedWidthFontRenderer;
 import dan200.computercraft.shared.ModRegistry;
 import dan200.computercraft.shared.media.items.PrintoutData;
-import dan200.computercraft.shared.media.items.PrintoutItem;
-import net.minecraft.client.renderer.MultiBufferSource;
-import net.minecraft.world.entity.EntityType;
-import net.minecraft.world.entity.decoration.ItemFrame;
+import net.minecraft.client.renderer.SubmitNodeCollector;
+import net.minecraft.client.renderer.entity.state.ItemFrameRenderState;
 import net.minecraft.world.item.ItemStack;
 
 import static dan200.computercraft.client.render.PrintoutRenderer.*;
@@ -30,30 +29,27 @@ public final class PrintoutItemRenderer extends ItemMapLikeRenderer {
     }
 
     @Override
-    protected void renderItem(PoseStack transform, MultiBufferSource render, ItemStack stack, int light) {
+    protected void renderItem(PoseStack transform, SubmitNodeCollector collector, ItemStack stack, int light) {
         transform.mulPose(Axis.XP.rotationDegrees(180f));
         transform.scale(0.42f, 0.42f, -0.42f);
         transform.translate(-0.5f, -0.48f, 0.0f);
 
-        drawPrintout(transform, render, stack, light);
+        drawPrintout(transform, collector, PrintoutData.getOrEmpty(stack), stack.getItem() == ModRegistry.Items.PRINTED_BOOK.get(), light);
     }
 
-    public static void onRenderInFrame(PoseStack transform, MultiBufferSource render, ItemFrame frame, ItemStack stack, int packedLight) {
+    public static void onRenderInFrame(PoseStack transform, SubmitNodeCollector collector, ItemFrameRenderState frame, PrintoutData data, boolean isBook) {
         // Move a little bit forward to ensure we're not clipping with the frame
         transform.translate(0.0f, 0.0f, -0.001f);
         transform.mulPose(Axis.ZP.rotationDegrees(180f));
         transform.scale(0.95f, 0.95f, -0.95f);
         transform.translate(-0.5f, -0.5f, 0.0f);
 
-        var light = frame.getType() == EntityType.GLOW_ITEM_FRAME ? 0xf000d2 : packedLight; // See getLightVal.
-        drawPrintout(transform, render, stack, light);
+        var light = frame.isGlowFrame ? 0xf000d2 : frame.lightCoords; // See getLightCoords.
+        drawPrintout(transform, collector, data, isBook, light);
     }
 
-    private static void drawPrintout(PoseStack transform, MultiBufferSource render, ItemStack stack, int light) {
-        var pageData = stack.getOrDefault(ModRegistry.DataComponents.PRINTOUT.get(), PrintoutData.EMPTY);
-
+    private static void drawPrintout(PoseStack transform, SubmitNodeCollector collector, PrintoutData pageData, boolean book, int light) {
         var pages = pageData.pages();
-        var book = ((PrintoutItem) stack.getItem()).getType() == PrintoutItem.Type.BOOK;
 
         double width = LINE_LENGTH * FONT_WIDTH + X_TEXT_MARGIN * 2;
         double height = LINES_PER_PAGE * FONT_HEIGHT + Y_TEXT_MARGIN * 2;
@@ -76,7 +72,7 @@ public final class PrintoutItemRenderer extends ItemMapLikeRenderer {
         transform.scale(scale, scale, scale);
         transform.translate((max - width) / 2.0, (max - height) / 2.0, 0.0);
 
-        drawBorder(transform, render, 0, 0, -0.01f, 0, pages, book, light);
-        drawText(transform, render, X_TEXT_MARGIN, Y_TEXT_MARGIN, 0, light, pageData.lines());
+        collector.submitCustomGeometry(transform, BACKGROUND, (matrix, buffer) -> drawBorder(matrix.pose(), buffer, 0, 0, -0.01f, 0, pages, book, light));
+        collector.submitCustomGeometry(transform, FixedWidthFontRenderer.TERMINAL_TEXT, (matrix, buffer) -> drawText(matrix.pose(), buffer, X_TEXT_MARGIN, Y_TEXT_MARGIN, 0, light, pageData.lines()));
     }
 }

projects/common/src/client/java/dan200/computercraft/client/render/PrintoutRenderer.java

@@ -11,6 +11,8 @@ import dan200.computercraft.core.terminal.Palette;
 import dan200.computercraft.core.terminal.TextBuffer;
 import dan200.computercraft.shared.media.items.PrintoutData;
 import net.minecraft.client.renderer.MultiBufferSource;
+import net.minecraft.client.renderer.RenderType;
+import net.minecraft.resources.ResourceLocation;
 import org.joml.Matrix4f;
 
 import java.util.List;
@@ -23,6 +25,12 @@ import static dan200.computercraft.shared.media.items.PrintoutData.LINES_PER_PAG
  * {@linkplain PrintoutItemRenderer in-hand/item frame printouts}.
  */
 public final class PrintoutRenderer {
+    /**
+     * Printout's background texture. {@link RenderType#text(ResourceLocation)} is a <em>little</em> questionable, but
+     * it is what maps use, so should behave the same as vanilla in both item frames and in-hand.
+     */
+    public static final RenderType BACKGROUND = RenderType.text(ResourceLocation.fromNamespaceAndPath("computercraft", "textures/gui/printout.png"));
+
     private static final float BG_SIZE = 256.0f;
 
     /**
@@ -58,26 +66,28 @@ public final class PrintoutRenderer {
     private static final int COVER_Y = Y_SIZE;
     private static final int COVER_X = X_SIZE + 4 * X_FOLD_SIZE;
 
+    private static final float BOOK_Z_OFFSET = -0.1f;
+    private static final float PAGE_Z_OFFSET = -0.01f;
+
     private PrintoutRenderer() {
     }
 
     public static void drawText(PoseStack transform, MultiBufferSource bufferSource, int x, int y, int start, int light, TextBuffer[] text, TextBuffer[] colours) {
-        var buffer = bufferSource.getBuffer(RenderTypes.PRINTOUT_TEXT);
-        var emitter = FixedWidthFontRenderer.toVertexConsumer(transform, buffer);
+        var buffer = bufferSource.getBuffer(FixedWidthFontRenderer.TERMINAL_TEXT);
         for (var line = 0; line < LINES_PER_PAGE && line < text.length; line++) {
-            FixedWidthFontRenderer.drawString(emitter,
+            FixedWidthFontRenderer.drawString(
+                transform.last().pose(), buffer,
                 x, y + line * FONT_HEIGHT, text[start + line], colours[start + line],
                 Palette.DEFAULT, light
             );
         }
     }
 
-    public static void drawText(PoseStack transform, MultiBufferSource bufferSource, int x, int y, int start, int light, List<PrintoutData.Line> lines) {
-        var buffer = bufferSource.getBuffer(RenderTypes.PRINTOUT_TEXT);
-        var emitter = FixedWidthFontRenderer.toVertexConsumer(transform, buffer);
+    public static void drawText(Matrix4f matrix4f, VertexConsumer buffer, int x, int y, int start, int light, List<PrintoutData.Line> lines) {
         for (var line = 0; line < LINES_PER_PAGE && line < lines.size(); line++) {
             var lineContents = lines.get(start + line);
-            FixedWidthFontRenderer.drawString(emitter,
+            FixedWidthFontRenderer.drawString(
+                matrix4f, buffer,
                 x, y + line * FONT_HEIGHT,
                 new TextBuffer(lineContents.text()), new TextBuffer(lineContents.foreground()),
                 Palette.DEFAULT, light
@@ -85,13 +95,10 @@ public final class PrintoutRenderer {
         }
     }
 
-    public static void drawBorder(PoseStack transform, MultiBufferSource bufferSource, float x, float y, float z, int page, int pages, boolean isBook, int light) {
-        var matrix = transform.last().pose();
+    public static void drawBorder(Matrix4f matrix, VertexConsumer buffer, float x, float y, float z, int page, int pages, boolean isBook, int light) {
         var leftPages = page;
         var rightPages = pages - page - 1;
 
-        var buffer = bufferSource.getBuffer(RenderTypes.PRINTOUT_BACKGROUND);
-
         if (isBook) {
             // Border
             var offset = offsetAt(pages);
@@ -99,12 +106,12 @@ public final class PrintoutRenderer {
             var right = x + X_SIZE + offset - 4;
 
             // Left and right border
-            drawTexture(matrix, buffer, left - 4, y - 8, z - 0.02f, COVER_X, 0, COVER_SIZE, Y_SIZE + COVER_SIZE * 2, light);
-            drawTexture(matrix, buffer, right, y - 8, z - 0.02f, COVER_X + COVER_SIZE, 0, COVER_SIZE, Y_SIZE + COVER_SIZE * 2, light);
+            drawTexture(matrix, buffer, left - 4, y - 8, z + BOOK_Z_OFFSET, COVER_X, 0, COVER_SIZE, Y_SIZE + COVER_SIZE * 2, light);
+            drawTexture(matrix, buffer, right, y - 8, z + BOOK_Z_OFFSET, COVER_X + COVER_SIZE, 0, COVER_SIZE, Y_SIZE + COVER_SIZE * 2, light);
 
             // Draw centre panel (just stretched texture, sorry).
             drawTexture(matrix, buffer,
-                x - offset, y, z - 0.02f, X_SIZE + offset * 2, Y_SIZE,
+                x - offset, y, z + BOOK_Z_OFFSET, X_SIZE + offset * 2, Y_SIZE,
                 COVER_X + COVER_SIZE / 2.0f, COVER_SIZE, COVER_SIZE, Y_SIZE,
                 light
             );
@@ -112,20 +119,20 @@ public final class PrintoutRenderer {
             var borderX = left;
             while (borderX < right) {
                 double thisWidth = Math.min(right - borderX, X_SIZE);
-                drawTexture(matrix, buffer, borderX, y - 8, z - 0.02f, 0, COVER_Y, (float) thisWidth, COVER_SIZE, light);
-                drawTexture(matrix, buffer, borderX, y + Y_SIZE - 4, z - 0.02f, 0, COVER_Y + COVER_SIZE, (float) thisWidth, COVER_SIZE, light);
+                drawTexture(matrix, buffer, borderX, y - 8, z + BOOK_Z_OFFSET, 0, COVER_Y, (float) thisWidth, COVER_SIZE, light);
+                drawTexture(matrix, buffer, borderX, y + Y_SIZE - 4, z + BOOK_Z_OFFSET, 0, COVER_Y + COVER_SIZE, (float) thisWidth, COVER_SIZE, light);
                 borderX = (float) (borderX + thisWidth);
             }
         }
 
         // Current page background: Z-offset is interleaved between the "zeroth" left/right page and the first
         // left/right page, so that the "bold" border can be drawn over the edge where appropriate.
-        drawTexture(matrix, buffer, x, y, z - 1e-3f * 0.5f, X_FOLD_SIZE * 2, 0, X_SIZE, Y_SIZE, light);
+        drawTexture(matrix, buffer, x, y, z + PAGE_Z_OFFSET, X_FOLD_SIZE * 2, 0, X_SIZE, Y_SIZE, light);
 
         // Left pages
         for (var n = 0; n <= leftPages; n++) {
             drawTexture(matrix, buffer,
-                x - offsetAt(n), y, z - 1e-3f * n,
+                x - offsetAt(n), y, z + PAGE_Z_OFFSET * (n + 1),
                 // Use the left "bold" fold for the outermost page
                 n == leftPages ? 0 : X_FOLD_SIZE, 0,
                 X_FOLD_SIZE, Y_SIZE, light
@@ -135,7 +142,7 @@ public final class PrintoutRenderer {
         // Right pages
         for (var n = 0; n <= rightPages; n++) {
             drawTexture(matrix, buffer,
-                x + (X_SIZE - X_FOLD_SIZE) + offsetAt(n), y, z - 1e-3f * n,
+                x + (X_SIZE - X_FOLD_SIZE) + offsetAt(n), y, z + PAGE_Z_OFFSET * (n + 1),
                 // Two folds, then the main page. Use the right "bold" fold for the outermost page.
                 X_FOLD_SIZE * 2 + X_SIZE + (n == rightPages ? X_FOLD_SIZE : 0), 0,
                 X_FOLD_SIZE, Y_SIZE, light

projects/common/src/client/java/dan200/computercraft/client/render/RenderTypes.java

@@ -1,102 +0,0 @@
-// SPDX-FileCopyrightText: 2021 The CC: Tweaked Developers
-//
-// SPDX-License-Identifier: MPL-2.0
-
-package dan200.computercraft.client.render;
-
-import com.mojang.blaze3d.vertex.DefaultVertexFormat;
-import com.mojang.blaze3d.vertex.VertexFormat;
-import dan200.computercraft.api.ComputerCraftAPI;
-import dan200.computercraft.client.gui.GuiSprites;
-import dan200.computercraft.client.render.monitor.MonitorTextureBufferShader;
-import dan200.computercraft.client.render.text.FixedWidthFontRenderer;
-import net.minecraft.client.renderer.GameRenderer;
-import net.minecraft.client.renderer.RenderStateShard;
-import net.minecraft.client.renderer.RenderType;
-import net.minecraft.client.renderer.ShaderInstance;
-import net.minecraft.resources.ResourceLocation;
-import net.minecraft.server.packs.resources.ResourceProvider;
-import org.jspecify.annotations.Nullable;
-
-import java.io.IOException;
-import java.util.Objects;
-import java.util.function.BiConsumer;
-import java.util.function.Consumer;
-
-/**
- * Shared {@link RenderType}s used throughout the mod.
- */
-public class RenderTypes {
-    public static final int FULL_BRIGHT_LIGHTMAP = (0xF << 4) | (0xF << 20);
-
-    private static @Nullable MonitorTextureBufferShader monitorTboShader;
-
-    /**
-     * Renders a fullbright terminal.
-     */
-    public static final RenderType TERMINAL = RenderType.text(FixedWidthFontRenderer.FONT);
-
-    /**
-     * Renders a monitor with the TBO shader.
-     *
-     * @see MonitorTextureBufferShader
-     */
-    public static final RenderType MONITOR_TBO = Types.MONITOR_TBO;
-
-    /**
-     * A variant of {@link #TERMINAL} which uses the lightmap rather than rendering fullbright.
-     */
-    public static final RenderType PRINTOUT_TEXT = RenderType.text(FixedWidthFontRenderer.FONT);
-
-    /**
-     * Printout's background texture. {@link RenderType#text(ResourceLocation)} is a <em>little</em> questionable, but
-     * it is what maps use, so should behave the same as vanilla in both item frames and in-hand.
-     */
-    public static final RenderType PRINTOUT_BACKGROUND = RenderType.text(ResourceLocation.fromNamespaceAndPath("computercraft", "textures/gui/printout.png"));
-
-    /**
-     * Render type for {@linkplain GuiSprites GUI sprites}.
-     */
-    public static final RenderType GUI_SPRITES = RenderType.text(GuiSprites.TEXTURE);
-
-    public static MonitorTextureBufferShader getMonitorTextureBufferShader() {
-        if (monitorTboShader == null) throw new NullPointerException("MonitorTboShader has not been registered");
-        return monitorTboShader;
-    }
-
-    public static ShaderInstance getTerminalShader() {
-        return Objects.requireNonNull(GameRenderer.getRendertypeTextShader(), "Text shader has not been registered");
-    }
-
-    public static void registerShaders(ResourceProvider resources, BiConsumer<ShaderInstance, Consumer<ShaderInstance>> load) throws IOException {
-        load.accept(
-            new MonitorTextureBufferShader(
-                resources,
-                ComputerCraftAPI.MOD_ID + "/monitor_tbo",
-                MONITOR_TBO.format()
-            ),
-            x -> monitorTboShader = (MonitorTextureBufferShader) x
-        );
-    }
-
-    private static final class Types extends RenderType {
-        private static final RenderStateShard.TextureStateShard TERM_FONT_TEXTURE = new TextureStateShard(
-            FixedWidthFontRenderer.FONT,
-            false, false // blur, minimap
-        );
-
-        static final RenderType MONITOR_TBO = RenderType.create(
-            "monitor_tbo", DefaultVertexFormat.POSITION_TEX, VertexFormat.Mode.TRIANGLE_STRIP, 128,
-            false, false, // useDelegate, needsSorting
-            RenderType.CompositeState.builder()
-                .setTextureState(TERM_FONT_TEXTURE)
-                .setShaderState(new ShaderStateShard(RenderTypes::getMonitorTextureBufferShader))
-                .createCompositeState(false)
-        );
-
-        @SuppressWarnings("UnusedMethod")
-        private Types(String name, VertexFormat format, VertexFormat.Mode mode, int buffer, boolean crumbling, boolean sort, Runnable setup, Runnable teardown) {
-            super(name, format, mode, buffer, crumbling, sort, setup, teardown);
-        }
-    }
-}

projects/common/src/client/java/dan200/computercraft/client/render/SpriteRenderer.java

@@ -4,131 +4,70 @@
 
 package dan200.computercraft.client.render;
 
+import com.mojang.blaze3d.vertex.PoseStack;
 import com.mojang.blaze3d.vertex.VertexConsumer;
 import net.minecraft.client.gui.GuiGraphics;
 import net.minecraft.client.renderer.RenderType;
+import net.minecraft.client.renderer.SubmitNodeCollector;
 import net.minecraft.client.renderer.texture.TextureAtlasSprite;
-import org.joml.Matrix4f;
+
 
 /**
- * A {@link GuiGraphics}-equivalent which is suitable for both rendering in to a GUI and in-world (as part of an entity
- * renderer).
+ * A {@link GuiGraphics}-equivalent renders to a {@link VertexConsumer}. This is suitable for rendering outside of a
+ * GUI, such as part of an entity renderer.
  * <p>
  * This batches all render calls together, though requires that all {@link TextureAtlasSprite}s are on the same sprite
  * sheet.
  */
 public class SpriteRenderer {
-    private final Matrix4f transform;
-    private final VertexConsumer builder;
+    private final PoseStack transform;
+    private final SubmitNodeCollector submit;
     private final int light;
     private final int z;
-    private final int r, g, b;
+    private final int colour;
 
-    public SpriteRenderer(Matrix4f transform, VertexConsumer builder, int z, int light, int r, int g, int b) {
+    public SpriteRenderer(PoseStack transform, SubmitNodeCollector submit, int z, int light, int colour) {
         this.transform = transform;
-        this.builder = builder;
+        this.submit = submit;
         this.z = z;
         this.light = light;
-        this.r = r;
-        this.g = g;
-        this.b = b;
+        this.colour = colour;
     }
 
-    public static SpriteRenderer createForGui(GuiGraphics graphics, RenderType renderType) {
-        return new SpriteRenderer(
-            graphics.pose().last().pose(), graphics.bufferSource().getBuffer(renderType),
-            0, RenderTypes.FULL_BRIGHT_LIGHTMAP, 255, 255, 255
-        );
+    public void blit(TextureAtlasSprite sprite, int x0, int y0, int width, int height, int spriteX, int spriteY, int spriteWidth, int spriteHeight) {
+        if (width == 0 || height == 0) return;
+
+        var x1 = x0 + width;
+        var y1 = y0 + height;
+        var u0 = sprite.getU((float) spriteX / spriteWidth);
+        var u1 = sprite.getU((float) (spriteX + width) / spriteWidth);
+        var v0 = sprite.getV((float) spriteY / spriteHeight);
+        var v1 = sprite.getV((float) (spriteY + height) / spriteHeight);
+
+        submit.submitCustomGeometry(transform, RenderType.text(sprite.atlasLocation()), (t, vertices) -> {
+            vertices.addVertex(t, x0, y1, z).setColor(colour).setUv(u0, v1).setLight(light);
+            vertices.addVertex(t, x1, y1, z).setColor(colour).setUv(u1, v1).setLight(light);
+            vertices.addVertex(t, x1, y0, z).setColor(colour).setUv(u1, v0).setLight(light);
+            vertices.addVertex(t, x0, y0, z).setColor(colour).setUv(u0, v0).setLight(light);
+        });
     }
 
-    /**
-     * Render a single sprite.
-     *
-     * @param sprite The texture to draw.
-     * @param x      The x position of the rectangle we'll draw.
-     * @param y      The x position of the rectangle we'll draw.
-     * @param width  The width of the rectangle we'll draw.
-     * @param height The height of the rectangle we'll draw.
-     */
-    public void blit(TextureAtlasSprite sprite, int x, int y, int width, int height) {
-        blit(x, y, width, height, sprite.getU0(), sprite.getV0(), sprite.getU1(), sprite.getV1());
-    }
+    public void blitTiled(
+        TextureAtlasSprite sprite,
+        int x, int y, int width, int height,
+        int tileX, int tileY, int tileWidth, int tileHeight, int spriteWidth, int spriteHeight
+    ) {
+        if (width <= 0 || height <= 0) return;
+        if (tileWidth <= 0 || tileHeight <= 0) {
+            throw new IllegalArgumentException("Tiled sprite texture size must be positive, got " + tileWidth + "x" + tileHeight);
+        }
 
-    /**
-     * Render a horizontal 3-sliced texture (i.e. split into left, middle and right). Unlike {@link GuiGraphics#blitNineSliced},
-     * the middle texture is stretched rather than repeated.
-     *
-     * @param sprite       The texture to draw.
-     * @param x            The x position of the rectangle we'll draw.
-     * @param y            The x position of the rectangle we'll draw.
-     * @param width        The width of the rectangle we'll draw.
-     * @param height       The height of the rectangle we'll draw.
-     * @param leftBorder   The width of the left border.
-     * @param rightBorder  The width of the right border.
-     * @param textureWidth The width of the whole texture.
-     */
-    public void blitHorizontalSliced(TextureAtlasSprite sprite, int x, int y, int width, int height, int leftBorder, int rightBorder, int textureWidth) {
-        // TODO(1.20.2)/TODO(1.21.0): Drive this from mcmeta files, like vanilla does.
-        if (width < leftBorder + rightBorder) throw new IllegalArgumentException("width is less than two borders");
-
-        var centerStart = SpriteRenderer.u(sprite, leftBorder, textureWidth);
-        var centerEnd = SpriteRenderer.u(sprite, textureWidth - rightBorder, textureWidth);
-
-        blit(x, y, leftBorder, height, sprite.getU0(), sprite.getV0(), centerStart, sprite.getV1());
-        blit(x + leftBorder, y, width - leftBorder - rightBorder, height, centerStart, sprite.getV0(), centerEnd, sprite.getV1());
-        blit(x + width - rightBorder, y, rightBorder, height, centerEnd, sprite.getV0(), sprite.getU1(), sprite.getV1());
-    }
-
-    /**
-     * Render a vertical 3-sliced texture (i.e. split into top, middle and bottom). Unlike {@link GuiGraphics#blitNineSliced},
-     * the middle texture is stretched rather than repeated.
-     *
-     * @param sprite        The texture to draw.
-     * @param x             The x position of the rectangle we'll draw.
-     * @param y             The x position of the rectangle we'll draw.
-     * @param width         The width of the rectangle we'll draw.
-     * @param height        The height of the rectangle we'll draw.
-     * @param topBorder     The height of the top border.
-     * @param bottomBorder  The height of the bottom border.
-     * @param textureHeight The height of the whole texture.
-     */
-    public void blitVerticalSliced(TextureAtlasSprite sprite, int x, int y, int width, int height, int topBorder, int bottomBorder, int textureHeight) {
-        // TODO(1.20.2)/TODO(1.21.0): Drive this from mcmeta files, like vanilla does.
-        if (width < topBorder + bottomBorder) throw new IllegalArgumentException("height is less than two borders");
-
-        var centerStart = SpriteRenderer.v(sprite, topBorder, textureHeight);
-        var centerEnd = SpriteRenderer.v(sprite, textureHeight - bottomBorder, textureHeight);
-
-        blit(x, y, width, topBorder, sprite.getU0(), sprite.getV0(), sprite.getU1(), centerStart);
-        blit(x, y + topBorder, width, height - topBorder - bottomBorder, sprite.getU0(), centerStart, sprite.getU1(), centerEnd);
-        blit(x, y + height - bottomBorder, width, bottomBorder, sprite.getU0(), centerEnd, sprite.getU1(), sprite.getV1());
-    }
-
-    /**
-     * The low-level blit function, used to render a portion of the sprite sheet. Unlike other functions, this takes uvs rather than a single sprite.
-     *
-     * @param x      The x position of the rectangle we'll draw.
-     * @param y      The x position of the rectangle we'll draw.
-     * @param width  The width of the rectangle we'll draw.
-     * @param height The height of the rectangle we'll draw.
-     * @param u0     The first U coordinate.
-     * @param v0     The first V coordinate.
-     * @param u1     The second U coordinate.
-     * @param v1     The second V coordinate.
-     */
-    public void blit(
-        int x, int y, int width, int height, float u0, float v0, float u1, float v1) {
-        builder.addVertex(transform, x, y + height, z).setColor(r, g, b, 255).setUv(u0, v1).setLight(light);
-        builder.addVertex(transform, x + width, y + height, z).setColor(r, g, b, 255).setUv(u1, v1).setLight(light);
-        builder.addVertex(transform, x + width, y, z).setColor(r, g, b, 255).setUv(u1, v0).setLight(light);
-        builder.addVertex(transform, x, y, z).setColor(r, g, b, 255).setUv(u0, v0).setLight(light);
-    }
-
-    public static float u(TextureAtlasSprite sprite, int x, int width) {
-        return sprite.getU((float) x / width);
-    }
-
-    public static float v(TextureAtlasSprite sprite, int y, int height) {
-        return sprite.getV((float) y / height);
+        for (var xOffset = 0; xOffset < width; xOffset += tileWidth) {
+            var sliceWidth = Math.min(tileWidth, width - xOffset);
+            for (var yOffset = 0; yOffset < height; yOffset += tileHeight) {
+                var sliceHeight = Math.min(tileHeight, height - yOffset);
+                blit(sprite, x + xOffset, y + yOffset, sliceWidth, sliceHeight, tileX, tileY, spriteWidth, spriteHeight);
+            }
+        }
     }
 }

projects/common/src/client/java/dan200/computercraft/client/render/TurtleBlockEntityRenderer.java

@@ -4,154 +4,162 @@
 
 package dan200.computercraft.client.render;
 
+import com.google.errorprone.annotations.concurrent.LazyInit;
 import com.mojang.blaze3d.vertex.PoseStack;
 import com.mojang.math.Axis;
-import com.mojang.math.Transformation;
 import dan200.computercraft.api.ComputerCraftAPI;
+import dan200.computercraft.api.client.StandaloneModel;
+import dan200.computercraft.api.turtle.ITurtleAccess;
 import dan200.computercraft.api.turtle.TurtleSide;
-import dan200.computercraft.client.platform.ClientPlatformHelper;
-import dan200.computercraft.client.turtle.TurtleUpgradeModellers;
-import dan200.computercraft.shared.turtle.TurtleOverlay;
+import dan200.computercraft.client.ClientRegistry;
+import dan200.computercraft.client.turtle.TurtleOverlay;
+import dan200.computercraft.client.turtle.TurtleOverlayManager;
+import dan200.computercraft.client.turtle.TurtleUpgradeModelManager;
+import dan200.computercraft.shared.computer.core.ComputerFamily;
 import dan200.computercraft.shared.turtle.blocks.TurtleBlockEntity;
 import dan200.computercraft.shared.util.Holiday;
 import net.minecraft.client.Minecraft;
-import net.minecraft.client.gui.Font;
-import net.minecraft.client.renderer.MultiBufferSource;
-import net.minecraft.client.renderer.blockentity.BlockEntityRenderDispatcher;
+import net.minecraft.client.renderer.SubmitNodeCollector;
+import net.minecraft.client.renderer.block.model.ItemTransform;
 import net.minecraft.client.renderer.blockentity.BlockEntityRenderer;
 import net.minecraft.client.renderer.blockentity.BlockEntityRendererProvider;
-import net.minecraft.client.resources.model.BakedModel;
+import net.minecraft.client.renderer.blockentity.state.BlockEntityRenderState;
+import net.minecraft.client.renderer.feature.ModelFeatureRenderer;
+import net.minecraft.client.renderer.item.ItemModelResolver;
+import net.minecraft.client.renderer.item.ItemStackRenderState;
+import net.minecraft.client.renderer.state.CameraRenderState;
+import net.minecraft.client.renderer.texture.OverlayTexture;
+import net.minecraft.network.chat.Component;
 import net.minecraft.resources.ResourceLocation;
-import net.minecraft.util.CommonColors;
-import net.minecraft.util.FastColor;
+import net.minecraft.util.ARGB;
 import net.minecraft.world.phys.BlockHitResult;
 import net.minecraft.world.phys.HitResult;
+import net.minecraft.world.phys.Vec3;
 import org.jspecify.annotations.Nullable;
 
-public class TurtleBlockEntityRenderer implements BlockEntityRenderer<TurtleBlockEntity> {
+public class TurtleBlockEntityRenderer implements BlockEntityRenderer<TurtleBlockEntity, TurtleBlockEntityRenderer.State> {
+    public static final ResourceLocation NORMAL_TURTLE_MODEL = ResourceLocation.fromNamespaceAndPath(ComputerCraftAPI.MOD_ID, "block/turtle_normal");
+    public static final ResourceLocation ADVANCED_TURTLE_MODEL = ResourceLocation.fromNamespaceAndPath(ComputerCraftAPI.MOD_ID, "block/turtle_advanced");
     public static final ResourceLocation COLOUR_TURTLE_MODEL = ResourceLocation.fromNamespaceAndPath(ComputerCraftAPI.MOD_ID, "block/turtle_colour");
 
-    private final BlockEntityRenderDispatcher renderer;
-    private final Font font;
+    private final ItemModelResolver itemModelResolver;
 
     public TurtleBlockEntityRenderer(BlockEntityRendererProvider.Context context) {
-        renderer = context.getBlockEntityRenderDispatcher();
-        font = context.getFont();
+        itemModelResolver = context.itemModelResolver();
+    }
+
+    public static final class State extends BlockEntityRenderState {
+        private @Nullable String label;
+        private Vec3 offset = Vec3.ZERO;
+        private int colour;
+        private float yaw;
+        private @LazyInit StandaloneModel model;
+        private @Nullable StandaloneModel overlay;
+        private @Nullable StandaloneModel elfOverlay;
+
+        private float leftAngle;
+        private final ItemStackRenderState leftUpgrade = new ItemStackRenderState();
+
+        private float rightAngle;
+        private final ItemStackRenderState rightUpgrade = new ItemStackRenderState();
+
+        private State() {
+        }
     }
 
     @Override
-    public void render(TurtleBlockEntity turtle, float partialTicks, PoseStack transform, MultiBufferSource buffers, int lightmapCoord, int overlayLight) {
+    public State createRenderState() {
+        return new State();
+    }
+
+    @Override
+    public void extractRenderState(TurtleBlockEntity turtle, State state, float partialTicks, Vec3 camera, ModelFeatureRenderer.@Nullable CrumblingOverlay crumblingOverlay) {
+        BlockEntityRenderer.super.extractRenderState(turtle, state, partialTicks, camera, crumblingOverlay);
+
+        var modelManager = Minecraft.getInstance().getModelManager();
+
+        var hit = Minecraft.getInstance().hitResult;
+        state.label = hit != null && hit.getType() == HitResult.Type.BLOCK && turtle.getBlockPos().equals(((BlockHitResult) hit).getBlockPos())
+            ? turtle.getLabel() : null;
+        state.colour = turtle.getColour();
+        state.offset = turtle.getRenderOffset(partialTicks);
+        state.yaw = turtle.getRenderYaw(partialTicks);
+
+        var modelLocation = state.colour == -1
+            ? (turtle.getFamily() == ComputerFamily.NORMAL ? NORMAL_TURTLE_MODEL : ADVANCED_TURTLE_MODEL)
+            : COLOUR_TURTLE_MODEL;
+        state.model = ClientRegistry.getModel(modelManager, modelLocation);
+
+        var overlay = TurtleOverlayManager.get(modelManager, turtle.getOverlay());
+        state.overlay = overlay == null ? null : overlay.model();
+        state.elfOverlay = Holiday.getCurrent() == Holiday.CHRISTMAS && (overlay == null || overlay.showElfOverlay())
+            ? ClientRegistry.getModel(modelManager, TurtleOverlay.ELF_MODEL)
+            : null;
+
+        state.leftAngle = turtle.getToolRenderAngle(TurtleSide.LEFT, partialTicks);
+        extractUpgrade(turtle.getAccess(), TurtleSide.LEFT, state.leftUpgrade);
+
+        state.rightAngle = turtle.getToolRenderAngle(TurtleSide.RIGHT, partialTicks);
+        extractUpgrade(turtle.getAccess(), TurtleSide.RIGHT, state.rightUpgrade);
+    }
+
+    private void extractUpgrade(ITurtleAccess turtle, TurtleSide side, ItemStackRenderState state) {
+        state.clear();
+        var upgrade = turtle.getUpgradeWithData(side);
+        if (upgrade == null) return;
+
+        TurtleUpgradeModelManager.get(Minecraft.getInstance().getModelManager(), upgrade.holder())
+            .renderForItem(upgrade, side, state, itemModelResolver, ItemTransform.NO_TRANSFORM, 31);
+    }
+
+    @Override
+    public void submit(State state, PoseStack transform, SubmitNodeCollector collector, CameraRenderState camera) {
         transform.pushPose();
 
         // Translate the turtle first, so the label moves with it.
-        var offset = turtle.getRenderOffset(partialTicks);
-        transform.translate(offset.x, offset.y, offset.z);
+        transform.translate(state.offset);
 
-        // Render the label
-        var label = turtle.getLabel();
-        var hit = renderer.cameraHitResult;
-        if (label != null && hit != null && hit.getType() == HitResult.Type.BLOCK && turtle.getBlockPos().equals(((BlockHitResult) hit).getBlockPos())) {
-            var mc = Minecraft.getInstance();
-            var font = this.font;
-
-            transform.pushPose();
-            transform.translate(0.5, 1.2, 0.5);
-            transform.mulPose(mc.getEntityRenderDispatcher().cameraOrientation());
-            transform.scale(0.025f, -0.025f, 0.025f);
-
-            var matrix = transform.last().pose();
-            var opacity = (int) (mc.options.getBackgroundOpacity(0.25f) * 255) << 24;
-            var width = -font.width(label) / 2.0f;
-            font.drawInBatch(label, width, (float) 0, 0x20ffffff, false, matrix, buffers, Font.DisplayMode.SEE_THROUGH, opacity, lightmapCoord);
-            font.drawInBatch(label, width, (float) 0, CommonColors.WHITE, false, matrix, buffers, Font.DisplayMode.NORMAL, 0, lightmapCoord);
-
-            transform.popPose();
+        if (state.label != null) {
+            collector.submitNameTag(
+                transform, new Vec3(0.5, 1.2, 0.5), 0, Component.literal(state.label), false, state.lightCoords,
+                camera.pos.distanceToSqr(Vec3.atCenterOf(state.blockPos)), // TODO: Should we read camera from the render state instead?
+                camera
+            );
         }
 
         // Then apply rotation and flip if needed.
         transform.translate(0.5f, 0.5f, 0.5f);
-        var yaw = turtle.getRenderYaw(partialTicks);
-        transform.mulPose(Axis.YP.rotationDegrees(180.0f - yaw));
-        if (label != null && (label.equals("Dinnerbone") || label.equals("Grumm"))) {
-            transform.scale(1.0f, -1.0f, 1.0f);
-        }
+        transform.mulPose(Axis.YP.rotationDegrees(180.0f - state.yaw));
         transform.translate(-0.5f, -0.5f, -0.5f);
 
-        // Render the turtle
-        var colour = turtle.getColour();
-        var overlay = turtle.getOverlay();
+        state.model.submit(transform, collector, state.lightCoords, OverlayTexture.NO_OVERLAY, state.colour == -1 ? null : new int[]{ ARGB.opaque(state.colour) }, state.breakProgress);
 
-        if (colour == -1) {
-            // Render the turtle using its item model.
-            var modelManager = Minecraft.getInstance().getItemRenderer().getItemModelShaper();
-            var model = modelManager.getItemModel(turtle.getBlockState().getBlock().asItem());
-            if (model == null) model = modelManager.getModelManager().getMissingModel();
-            renderModel(transform, buffers, lightmapCoord, overlayLight, model, null);
-        } else {
-            // Otherwise render it using the colour item.
-            renderModel(transform, buffers, lightmapCoord, overlayLight, COLOUR_TURTLE_MODEL, new int[]{ FastColor.ARGB32.opaque(colour) });
+        if (state.overlay != null) {
+            state.overlay.submit(transform, collector, state.lightCoords, OverlayTexture.NO_OVERLAY);
+        }
+        if (state.elfOverlay != null) {
+            state.elfOverlay.submit(transform, collector, state.lightCoords, OverlayTexture.NO_OVERLAY);
         }
 
-        // Render the overlay
-        if (overlay != null) renderModel(transform, buffers, lightmapCoord, overlayLight, overlay.model(), null);
-
-        // And the Christmas overlay.
-        var showChristmas = TurtleOverlay.showElfOverlay(overlay, Holiday.getCurrent() == Holiday.CHRISTMAS);
-        if (showChristmas) renderModel(transform, buffers, lightmapCoord, overlayLight, TurtleOverlay.ELF_MODEL, null);
-
-        // Render the upgrades
-        renderUpgrade(transform, buffers, lightmapCoord, overlayLight, turtle, TurtleSide.LEFT, partialTicks);
-        renderUpgrade(transform, buffers, lightmapCoord, overlayLight, turtle, TurtleSide.RIGHT, partialTicks);
+        submitUpgrade(transform, collector, state.lightCoords, state.leftAngle, state.leftUpgrade);
+        submitUpgrade(transform, collector, state.lightCoords, state.rightAngle, state.rightUpgrade);
 
         transform.popPose();
     }
 
-    private void renderUpgrade(PoseStack transform, MultiBufferSource buffers, int lightmapCoord, int overlayLight, TurtleBlockEntity turtle, TurtleSide side, float f) {
-        var upgrade = turtle.getUpgrade(side);
-        if (upgrade == null) return;
+    private void submitUpgrade(PoseStack transform, SubmitNodeCollector collector, int lightmapCoord, float angle, ItemStackRenderState state) {
+        if (state.isEmpty()) return;
         transform.pushPose();
 
-        var toolAngle = turtle.getToolRenderAngle(side, f);
+        // Swing the tool
         transform.translate(0.0f, 0.5f, 0.5f);
-        transform.mulPose(Axis.XN.rotationDegrees(toolAngle));
+        transform.mulPose(Axis.XN.rotationDegrees(angle));
         transform.translate(0.0f, -0.5f, -0.5f);
 
-        var model = TurtleUpgradeModellers.getModel(upgrade, turtle.getAccess(), side);
-        applyTransformation(transform, model.matrix());
-        renderModel(transform, buffers, lightmapCoord, overlayLight, model.model(), null);
+        // Then reposition for rendering the item
+        transform.translate(0.5f, 0.5f, 0.5f);
+        state.submit(transform, collector, lightmapCoord, OverlayTexture.NO_OVERLAY, 0);
 
         transform.popPose();
     }
-
-    private void renderModel(PoseStack transform, MultiBufferSource buffers, int lightmapCoord, int overlayLight, ResourceLocation modelLocation, int @Nullable [] tints) {
-        var modelManager = Minecraft.getInstance().getItemRenderer().getItemModelShaper().getModelManager();
-        renderModel(transform, buffers, lightmapCoord, overlayLight, ClientPlatformHelper.get().getModel(modelManager, modelLocation), tints);
-    }
-
-    /**
-     * Render a block model.
-     *
-     * @param transform     The current matrix stack.
-     * @param renderer      The buffer to write to.
-     * @param lightmapCoord The current lightmap coordinate.
-     * @param overlayLight  The overlay light.
-     * @param model         The model to render.
-     * @param tints         Tints for the quads, as an array of RGB values.
-     * @see net.minecraft.client.renderer.block.ModelBlockRenderer#renderModel
-     */
-    private void renderModel(PoseStack transform, MultiBufferSource renderer, int lightmapCoord, int overlayLight, BakedModel model, int @Nullable [] tints) {
-        ClientPlatformHelper.get().renderBakedModel(transform, renderer, model, lightmapCoord, overlayLight, tints);
-    }
-
-    private static void applyTransformation(PoseStack stack, Transformation transformation) {
-        var trans = transformation.getTranslation();
-        stack.translate(trans.x(), trans.y(), trans.z());
-
-        stack.mulPose(transformation.getLeftRotation());
-
-        var scale = transformation.getScale();
-        stack.scale(scale.x(), scale.y(), scale.z());
-
-        stack.mulPose(transformation.getRightRotation());
-    }
 }

projects/common/src/client/java/dan200/computercraft/client/render/monitor/MonitorBlockEntityRenderer.java

@@ -4,111 +4,81 @@
 
 package dan200.computercraft.client.render.monitor;
 
-import com.mojang.blaze3d.platform.GlStateManager;
-import com.mojang.blaze3d.systems.RenderSystem;
 import com.mojang.blaze3d.vertex.PoseStack;
-import com.mojang.blaze3d.vertex.Tesselator;
-import com.mojang.blaze3d.vertex.VertexBuffer;
-import com.mojang.blaze3d.vertex.VertexConsumer;
 import com.mojang.math.Axis;
 import dan200.computercraft.annotations.ForgeOverride;
-import dan200.computercraft.client.FrameInfo;
-import dan200.computercraft.client.integration.ShaderMod;
-import dan200.computercraft.client.render.RenderTypes;
-import dan200.computercraft.client.render.text.DirectFixedWidthFontRenderer;
 import dan200.computercraft.client.render.text.FixedWidthFontRenderer;
-import dan200.computercraft.client.render.vbo.DirectBuffers;
-import dan200.computercraft.client.render.vbo.DirectVertexBuffer;
-import dan200.computercraft.core.terminal.Terminal;
-import dan200.computercraft.core.util.Nullability;
 import dan200.computercraft.shared.config.Config;
 import dan200.computercraft.shared.peripheral.monitor.ClientMonitor;
 import dan200.computercraft.shared.peripheral.monitor.MonitorBlockEntity;
-import dan200.computercraft.shared.peripheral.monitor.MonitorRenderer;
 import dan200.computercraft.shared.util.DirectionUtil;
-import net.minecraft.client.renderer.MultiBufferSource;
+import net.minecraft.client.renderer.SubmitNodeCollector;
 import net.minecraft.client.renderer.blockentity.BlockEntityRenderer;
 import net.minecraft.client.renderer.blockentity.BlockEntityRendererProvider;
+import net.minecraft.client.renderer.blockentity.state.BlockEntityRenderState;
+import net.minecraft.client.renderer.feature.ModelFeatureRenderer;
+import net.minecraft.client.renderer.state.CameraRenderState;
+import net.minecraft.core.Direction;
 import net.minecraft.world.phys.AABB;
-import org.joml.Matrix4f;
+import net.minecraft.world.phys.Vec3;
 import org.jspecify.annotations.Nullable;
-import org.lwjgl.opengl.GL11;
-import org.lwjgl.opengl.GL20;
-import org.lwjgl.opengl.GL31;
-import org.lwjgl.system.MemoryUtil;
-
-import java.nio.ByteBuffer;
-import java.util.function.Consumer;
 
 import static dan200.computercraft.client.render.text.FixedWidthFontRenderer.FONT_HEIGHT;
 import static dan200.computercraft.client.render.text.FixedWidthFontRenderer.FONT_WIDTH;
-import static dan200.computercraft.core.util.Nullability.assertNonNull;
 
-public class MonitorBlockEntityRenderer implements BlockEntityRenderer<MonitorBlockEntity> {
+public class MonitorBlockEntityRenderer implements BlockEntityRenderer<MonitorBlockEntity, MonitorBlockEntityRenderer.State> {
     /**
      * {@link MonitorBlockEntity#RENDER_MARGIN}, but a tiny bit of additional padding to ensure that there is no space between
      * the monitor frame and contents.
      */
     private static final float MARGIN = (float) (MonitorBlockEntity.RENDER_MARGIN * 1.1);
 
-    private static @Nullable ByteBuffer backingBuffer;
-
-    private static long lastFrame = -1;
-
     public MonitorBlockEntityRenderer(BlockEntityRendererProvider.Context context) {
     }
 
     @Override
-    public void render(MonitorBlockEntity monitor, float partialTicks, PoseStack transform, MultiBufferSource bufferSource, int lightmapCoord, int overlayLight) {
-        // Render from the origin monitor
-        var originTerminal = monitor.getOriginClientMonitor();
-        if (originTerminal == null) return;
+    public State createRenderState() {
+        return new State();
+    }
 
-        var origin = originTerminal.getOrigin();
-        var renderState = originTerminal.getRenderState(MonitorRenderState::new);
-        var monitorPos = monitor.getBlockPos();
+    @Override
+    public void extractRenderState(MonitorBlockEntity monitor, State state, float f, Vec3 camera, ModelFeatureRenderer.@Nullable CrumblingOverlay crumblingOverlay) {
+        BlockEntityRenderer.super.extractRenderState(monitor, state, f, camera, crumblingOverlay);
 
-        // Ensure each monitor terminal is rendered only once. We allow rendering a specific tile
-        // multiple times in a single frame to ensure compatibility with shaders which may run a
-        // pass multiple times.
-        var renderFrame = FrameInfo.getRenderFrame();
-        if (renderState.lastRenderFrame == renderFrame && !monitorPos.equals(renderState.lastRenderPos)) {
-            return;
-        }
+        state.direction = monitor.getDirection();
+        state.front = monitor.getFront();
+        state.width = monitor.getWidth();
+        state.height = monitor.getHeight();
+        state.terminal = monitor.getOriginClientMonitor();
+    }
 
-        lastFrame = renderFrame;
-        renderState.lastRenderFrame = renderFrame;
-        renderState.lastRenderPos = monitorPos;
-
-        var originPos = origin.getBlockPos();
+    @Override
+    public void submit(State state, PoseStack transform, SubmitNodeCollector collector, CameraRenderState camera) {
+        if (state.terminal == null) return;
 
         // Determine orientation
-        var dir = origin.getDirection();
-        var front = origin.getFront();
+        var dir = state.direction;
+        var front = state.front;
         var yaw = dir.toYRot();
         var pitch = DirectionUtil.toPitchAngle(front);
 
         // Setup initial transform
         transform.pushPose();
-        transform.translate(
-            originPos.getX() - monitorPos.getX() + 0.5,
-            originPos.getY() - monitorPos.getY() + 0.5,
-            originPos.getZ() - monitorPos.getZ() + 0.5
-        );
+        transform.translate(0.5, 0.5, 0.5);
 
         transform.mulPose(Axis.YN.rotationDegrees(yaw));
         transform.mulPose(Axis.XP.rotationDegrees(pitch));
         transform.translate(
             -0.5 + MonitorBlockEntity.RENDER_BORDER + MonitorBlockEntity.RENDER_MARGIN,
-            origin.getHeight() - 0.5 - (MonitorBlockEntity.RENDER_BORDER + MonitorBlockEntity.RENDER_MARGIN) + 0,
+            state.height - 0.5 - (MonitorBlockEntity.RENDER_BORDER + MonitorBlockEntity.RENDER_MARGIN) + 0,
             0.5
         );
-        var xSize = origin.getWidth() - 2.0 * (MonitorBlockEntity.RENDER_MARGIN + MonitorBlockEntity.RENDER_BORDER);
-        var ySize = origin.getHeight() - 2.0 * (MonitorBlockEntity.RENDER_MARGIN + MonitorBlockEntity.RENDER_BORDER);
+        var xSize = state.width - 2.0 * (MonitorBlockEntity.RENDER_MARGIN + MonitorBlockEntity.RENDER_BORDER);
+        var ySize = state.height - 2.0 * (MonitorBlockEntity.RENDER_MARGIN + MonitorBlockEntity.RENDER_BORDER);
 
         // Draw the contents
-        var terminal = originTerminal.getTerminal();
-        if (terminal != null && !ShaderMod.get().isRenderingShadowPass()) {
+        var terminal = state.terminal.getTerminal();
+        if (terminal != null) {
             // Draw a terminal
             int width = terminal.getWidth(), height = terminal.getHeight();
             int pixelWidth = width * FONT_WIDTH, pixelHeight = height * FONT_HEIGHT;
@@ -117,147 +87,25 @@ public class MonitorBlockEntityRenderer implements BlockEntityRenderer<MonitorBl
             transform.pushPose();
             transform.scale((float) xScale, (float) -yScale, 1.0f);
 
-            var matrix = transform.last().pose();
+            var xMargin = (float) (MARGIN / xScale);
+            var yMargin = (float) (MARGIN / yScale);
 
-            renderTerminal(matrix, originTerminal, renderState, terminal, (float) (MARGIN / xScale), (float) (MARGIN / yScale));
+            collector.submitCustomGeometry(transform, FixedWidthFontRenderer.TERMINAL_TEXT, (pose, buffer) -> {
+                FixedWidthFontRenderer.drawTerminalBackground(pose.pose(), buffer, 0, 0, terminal, yMargin, yMargin, xMargin, xMargin);
+            });
+            collector.submitCustomGeometry(transform, FixedWidthFontRenderer.TERMINAL_TEXT_OFFSET, (pose, buffer) -> {
+                FixedWidthFontRenderer.drawTerminalForeground(pose.pose(), buffer, 0, 0, terminal);
+                FixedWidthFontRenderer.drawCursor(pose.pose(), buffer, 0, 0, terminal);
+            });
 
             transform.popPose();
         } else {
-            FixedWidthFontRenderer.drawEmptyTerminal(
-                FixedWidthFontRenderer.toVertexConsumer(transform, bufferSource.getBuffer(RenderTypes.TERMINAL)),
-                -MARGIN, MARGIN,
-                (float) (xSize + 2 * MARGIN), (float) -(ySize + MARGIN * 2)
-            );
+            FixedWidthFontRenderer.drawEmptyTerminal(transform, collector, -MARGIN, MARGIN, (float) (xSize + 2 * MARGIN), (float) -(ySize + MARGIN * 2));
         }
 
         transform.popPose();
     }
 
-    private static void renderTerminal(
-        Matrix4f matrix, ClientMonitor monitor, MonitorRenderState renderState, Terminal terminal, float xMargin, float yMargin
-    ) {
-        int width = terminal.getWidth(), height = terminal.getHeight();
-        int pixelWidth = width * FONT_WIDTH, pixelHeight = height * FONT_HEIGHT;
-
-        var renderType = currentRenderer();
-        var redraw = monitor.pollTerminalChanged();
-        if (renderState.createBuffer(renderType)) redraw = true;
-
-        switch (renderType) {
-            case TBO -> {
-                if (redraw) {
-                    var terminalBuffer = getBuffer(width * height * 3);
-                    MonitorTextureBufferShader.setTerminalData(terminalBuffer, terminal);
-                    DirectBuffers.setBufferData(GL31.GL_TEXTURE_BUFFER, renderState.tboBuffer, terminalBuffer, GL20.GL_STATIC_DRAW);
-
-                    var uniformBuffer = getBuffer(MonitorTextureBufferShader.UNIFORM_SIZE);
-                    MonitorTextureBufferShader.setUniformData(uniformBuffer, terminal);
-                    DirectBuffers.setBufferData(GL31.GL_UNIFORM_BUFFER, renderState.tboUniform, uniformBuffer, GL20.GL_STATIC_DRAW);
-                }
-
-                // Nobody knows what they're doing!
-                var active = GlStateManager._getActiveTexture();
-                RenderSystem.activeTexture(MonitorTextureBufferShader.TEXTURE_INDEX);
-                GL11.glBindTexture(GL31.GL_TEXTURE_BUFFER, renderState.tboTexture);
-                RenderSystem.activeTexture(active);
-
-                var shader = RenderTypes.getMonitorTextureBufferShader();
-                shader.setupUniform(renderState.tboUniform);
-
-                var buffer = Tesselator.getInstance().begin(RenderTypes.MONITOR_TBO.mode(), RenderTypes.MONITOR_TBO.format());
-                tboVertex(buffer, matrix, -xMargin, -yMargin);
-                tboVertex(buffer, matrix, -xMargin, pixelHeight + yMargin);
-                tboVertex(buffer, matrix, pixelWidth + xMargin, -yMargin);
-                tboVertex(buffer, matrix, pixelWidth + xMargin, pixelHeight + yMargin);
-                RenderTypes.MONITOR_TBO.draw(Nullability.assertNonNull(buffer.build()));
-            }
-            case VBO -> {
-                var backgroundBuffer = assertNonNull(renderState.backgroundBuffer);
-                var foregroundBuffer = assertNonNull(renderState.foregroundBuffer);
-                if (redraw) {
-                    var size = DirectFixedWidthFontRenderer.getVertexCount(terminal);
-
-                    // In an ideal world we could upload these both into one buffer. However, we can't render VBOs with
-                    // a starting and ending offset, and so need to use two buffers instead.
-
-                    renderToBuffer(backgroundBuffer, size, sink ->
-                        DirectFixedWidthFontRenderer.drawTerminalBackground(sink, 0, 0, terminal, yMargin, yMargin, xMargin, xMargin));
-
-                    renderToBuffer(foregroundBuffer, size, sink -> {
-                        DirectFixedWidthFontRenderer.drawTerminalForeground(sink, 0, 0, terminal);
-                        // If the cursor is visible, we append it to the end of our buffer. When rendering, we can either
-                        // render n or n+1 quads and so toggle the cursor on and off.
-                        DirectFixedWidthFontRenderer.drawCursor(sink, 0, 0, terminal);
-                    });
-                }
-
-                // Our VBO renders coordinates in monitor-space rather than world space. A full sized monitor (8x6) will
-                // use positions from (0, 0) to (164*FONT_WIDTH, 81*FONT_HEIGHT) = (984, 729). This is far outside the
-                // normal render distance (~200), and the edges of the monitor fade out due to fog.
-                // There's not really a good way around this, at least without using a custom render type (which the VBO
-                // renderer is trying to avoid!). Instead, we just disable fog entirely by setting the fog start to an
-                // absurdly high value.
-                var oldFogStart = RenderSystem.getShaderFogStart();
-                RenderSystem.setShaderFogStart(1e4f);
-
-                RenderTypes.TERMINAL.setupRenderState();
-
-                // Compose the existing model view matrix with our transformation matrix.
-                var modelView = new Matrix4f(RenderSystem.getModelViewMatrix()).mul(matrix);
-
-                // Render background geometry
-                backgroundBuffer.bind();
-                backgroundBuffer.drawWithShader(modelView, RenderSystem.getProjectionMatrix(), RenderTypes.getTerminalShader());
-
-                // Render foreground geometry with glPolygonOffset enabled.
-                RenderSystem.polygonOffset(-1.0f, -10.0f);
-                RenderSystem.enablePolygonOffset();
-
-                foregroundBuffer.bind();
-                foregroundBuffer.drawWithShader(
-                    modelView, RenderSystem.getProjectionMatrix(), RenderTypes.getTerminalShader(),
-                    // Skip the cursor quad if it is not visible this frame.
-                    FixedWidthFontRenderer.isCursorVisible(terminal) && !FrameInfo.getGlobalCursorBlink()
-                        ? foregroundBuffer.getIndexCount() - RenderTypes.TERMINAL.mode().indexCount(4)
-                        : foregroundBuffer.getIndexCount()
-                );
-
-                // Clear state
-                RenderSystem.polygonOffset(0.0f, -0.0f);
-                RenderSystem.disablePolygonOffset();
-                RenderTypes.TERMINAL.clearRenderState();
-                VertexBuffer.unbind();
-
-                RenderSystem.setShaderFogStart(oldFogStart);
-            }
-            case BEST -> throw new IllegalStateException("Impossible: Should never use BEST renderer");
-        }
-    }
-
-    private static void renderToBuffer(DirectVertexBuffer vbo, int size, Consumer<DirectFixedWidthFontRenderer.QuadEmitter> draw) {
-        var sink = ShaderMod.get().getQuadEmitter(size, MonitorBlockEntityRenderer::getBuffer);
-        var buffer = sink.buffer();
-
-        draw.accept(sink);
-        buffer.flip();
-        vbo.upload(buffer.limit() / sink.format().getVertexSize(), RenderTypes.TERMINAL.mode(), sink.format(), buffer);
-    }
-
-    private static void tboVertex(VertexConsumer builder, Matrix4f matrix, float x, float y) {
-        // We encode position in the UV, as that's not transformed by the matrix.
-        builder.addVertex(matrix, x, y, 0).setUv(x, y);
-    }
-
-    private static ByteBuffer getBuffer(int capacity) {
-        var buffer = backingBuffer;
-        if (buffer == null || buffer.capacity() < capacity) {
-            buffer = backingBuffer = buffer == null ? MemoryUtil.memAlloc(capacity) : MemoryUtil.memRealloc(buffer, capacity);
-        }
-
-        buffer.clear();
-        return buffer;
-    }
-
     @Override
     public int getViewDistance() {
         return Config.monitorDistance;
@@ -268,27 +116,19 @@ public class MonitorBlockEntityRenderer implements BlockEntityRenderer<MonitorBl
         return monitor.getRenderBoundingBox();
     }
 
-    /**
-     * Determine if any monitors were rendered this frame.
-     *
-     * @return Whether any monitors were rendered.
-     */
-    public static boolean hasRenderedThisFrame() {
-        return FrameInfo.getRenderFrame() == lastFrame;
+    @Override
+    public boolean shouldRender(MonitorBlockEntity monitor, Vec3 camera) {
+        return BlockEntityRenderer.super.shouldRender(monitor, camera) && monitor.getXIndex() == 0 && monitor.getYIndex() == 0;
     }
 
-    /**
-     * Get the current renderer to use.
-     *
-     * @return The current renderer. Will not return {@link MonitorRenderer#BEST}.
-     */
-    public static MonitorRenderer currentRenderer() {
-        var current = Config.monitorRenderer;
-        if (current == MonitorRenderer.BEST) current = Config.monitorRenderer = bestRenderer();
-        return current;
-    }
+    public static final class State extends BlockEntityRenderState {
+        private Direction direction = Direction.NORTH;
+        private Direction front = Direction.NORTH;
+        private int width;
+        private int height;
+        private @Nullable ClientMonitor terminal;
 
-    private static MonitorRenderer bestRenderer() {
-        return MonitorRenderer.VBO;
+        private State() {
+        }
     }
 }

projects/common/src/client/java/dan200/computercraft/client/render/monitor/MonitorHighlightRenderer.java

@@ -6,13 +6,12 @@ package dan200.computercraft.client.render.monitor;
 
 import com.mojang.blaze3d.vertex.PoseStack;
 import com.mojang.blaze3d.vertex.VertexConsumer;
+import dan200.computercraft.client.render.BlockOutlineRenderer;
 import dan200.computercraft.shared.peripheral.monitor.MonitorBlockEntity;
 import net.minecraft.client.Camera;
 import net.minecraft.client.renderer.MultiBufferSource;
-import net.minecraft.client.renderer.RenderType;
 import net.minecraft.core.Direction;
 import net.minecraft.world.phys.BlockHitResult;
-import org.joml.Matrix4f;
 
 import java.util.EnumSet;
 
@@ -30,11 +29,10 @@ public final class MonitorHighlightRenderer {
         // Preserve normal behaviour when crouching.
         if (camera.getEntity().isCrouching()) return false;
 
-        var world = camera.getEntity().getCommandSenderWorld();
+        var world = camera.getEntity().level();
         var pos = hit.getBlockPos();
 
-        var tile = world.getBlockEntity(pos);
-        if (!(tile instanceof MonitorBlockEntity monitor)) return false;
+        if (!(world.getBlockEntity(pos) instanceof MonitorBlockEntity monitor)) return false;
 
         // Determine which sides are part of the external faces of the monitor, and so which need to be rendered.
         var faces = EnumSet.allOf(Direction.class);
@@ -49,39 +47,37 @@ public final class MonitorHighlightRenderer {
         transformStack.pushPose();
         transformStack.translate(pos.getX() - cameraPos.x(), pos.getY() - cameraPos.y(), pos.getZ() - cameraPos.z());
 
-        // I wish I could think of a better way to do this
-        var buffer = bufferSource.getBuffer(RenderType.lines());
-        var transform = transformStack.last().pose();
-        var normal = transformStack.last();
-        if (faces.contains(NORTH) || faces.contains(WEST)) line(buffer, transform, normal, 0, 0, 0, UP);
-        if (faces.contains(SOUTH) || faces.contains(WEST)) line(buffer, transform, normal, 0, 0, 1, UP);
-        if (faces.contains(NORTH) || faces.contains(EAST)) line(buffer, transform, normal, 1, 0, 0, UP);
-        if (faces.contains(SOUTH) || faces.contains(EAST)) line(buffer, transform, normal, 1, 0, 1, UP);
-        if (faces.contains(NORTH) || faces.contains(DOWN)) line(buffer, transform, normal, 0, 0, 0, EAST);
-        if (faces.contains(SOUTH) || faces.contains(DOWN)) line(buffer, transform, normal, 0, 0, 1, EAST);
-        if (faces.contains(NORTH) || faces.contains(UP)) line(buffer, transform, normal, 0, 1, 0, EAST);
-        if (faces.contains(SOUTH) || faces.contains(UP)) line(buffer, transform, normal, 0, 1, 1, EAST);
-        if (faces.contains(WEST) || faces.contains(DOWN)) line(buffer, transform, normal, 0, 0, 0, SOUTH);
-        if (faces.contains(EAST) || faces.contains(DOWN)) line(buffer, transform, normal, 1, 0, 0, SOUTH);
-        if (faces.contains(WEST) || faces.contains(UP)) line(buffer, transform, normal, 0, 1, 0, SOUTH);
-        if (faces.contains(EAST) || faces.contains(UP)) line(buffer, transform, normal, 1, 1, 0, SOUTH);
+        var transform = transformStack.last();
+        BlockOutlineRenderer.render(bufferSource, (buffer, colour) -> draw(buffer, transform, faces, colour));
 
         transformStack.popPose();
         return true;
     }
 
-    private static void line(VertexConsumer buffer, Matrix4f transform, PoseStack.Pose normal, float x, float y, float z, Direction direction) {
+    private static void draw(VertexConsumer buffer, PoseStack.Pose transform, EnumSet<Direction> faces, int colour) {
+        // I wish I could think of a better way to do this
+        if (faces.contains(NORTH) || faces.contains(WEST)) line(buffer, transform, 0, 0, 0, UP, colour);
+        if (faces.contains(SOUTH) || faces.contains(WEST)) line(buffer, transform, 0, 0, 1, UP, colour);
+        if (faces.contains(NORTH) || faces.contains(EAST)) line(buffer, transform, 1, 0, 0, UP, colour);
+        if (faces.contains(SOUTH) || faces.contains(EAST)) line(buffer, transform, 1, 0, 1, UP, colour);
+        if (faces.contains(NORTH) || faces.contains(DOWN)) line(buffer, transform, 0, 0, 0, EAST, colour);
+        if (faces.contains(SOUTH) || faces.contains(DOWN)) line(buffer, transform, 0, 0, 1, EAST, colour);
+        if (faces.contains(NORTH) || faces.contains(UP)) line(buffer, transform, 0, 1, 0, EAST, colour);
+        if (faces.contains(SOUTH) || faces.contains(UP)) line(buffer, transform, 0, 1, 1, EAST, colour);
+        if (faces.contains(WEST) || faces.contains(DOWN)) line(buffer, transform, 0, 0, 0, SOUTH, colour);
+        if (faces.contains(EAST) || faces.contains(DOWN)) line(buffer, transform, 1, 0, 0, SOUTH, colour);
+        if (faces.contains(WEST) || faces.contains(UP)) line(buffer, transform, 0, 1, 0, SOUTH, colour);
+        if (faces.contains(EAST) || faces.contains(UP)) line(buffer, transform, 1, 1, 0, SOUTH, colour);
+    }
+
+    private static void line(VertexConsumer buffer, PoseStack.Pose transform, float x, float y, float z, Direction direction, int colour) {
         buffer
             .addVertex(transform, x, y, z)
-            .setColor(0, 0, 0, 0.4f)
-            .setNormal(normal, direction.getStepX(), direction.getStepY(), direction.getStepZ());
+            .setColor(colour)
+            .setNormal(transform, direction.getStepX(), direction.getStepY(), direction.getStepZ());
         buffer
-            .addVertex(transform,
-                x + direction.getStepX(),
-                y + direction.getStepY(),
-                z + direction.getStepZ()
-            )
-            .setColor(0, 0, 0, 0.4f)
-            .setNormal(normal, direction.getStepX(), direction.getStepY(), direction.getStepZ());
+            .addVertex(transform, x + direction.getStepX(), y + direction.getStepY(), z + direction.getStepZ())
+            .setColor(colour)
+            .setNormal(transform, direction.getStepX(), direction.getStepY(), direction.getStepZ());
     }
 }