Add warnings regarding OptiFine Fast Render

build.gradle

@@ -132,7 +132,7 @@ def commonManifest = {
     attributes 'Implementation-Vendor': 'covers1624'
     attributes 'Implementation-Version': version
     attributes 'Implementation-Timestamp': new Date().format("yyyy-MM-dd'T'HH:mm:ssZ")
-    attributes 'MixinConfigs': 'mixins.codechickenlib.json'
+    attributes 'MixinConfigs': 'mixins.codechickenlib.json,mixins.codechickenlib.optifine.json'
 }
 
 jar {

src/main/java/codechicken/lib/internal/optifine/OptiFineGameSettingsBridge.java

@@ -0,0 +1,8 @@
+package codechicken.lib.internal.optifine;
+
+public interface OptiFineGameSettingsBridge {
+
+    boolean bridge$isFastRender();
+
+    void bridge$setFastRender(boolean value);
+}

src/main/java/codechicken/lib/internal/optifine/OptiFineGuiListener.java

@@ -0,0 +1,59 @@
+package codechicken.lib.internal.optifine;
+
+import codechicken.lib.CodeChickenLib;
+import net.minecraft.client.GameSettings;
+import net.minecraft.client.Minecraft;
+import net.minecraft.client.gui.screen.MainMenuScreen;
+import net.minecraft.client.gui.toasts.SystemToast;
+import net.minecraft.util.Util;
+import net.minecraft.util.text.TranslationTextComponent;
+import net.minecraftforge.api.distmarker.Dist;
+import net.minecraftforge.client.event.GuiScreenEvent;
+import net.minecraftforge.eventbus.api.SubscribeEvent;
+import net.minecraftforge.fml.common.Mod;
+
+@Mod.EventBusSubscriber (modid = CodeChickenLib.MOD_ID, value = Dist.CLIENT)
+public class OptiFineGuiListener {
+
+    private static boolean notified;
+    private static long firstRenderTime;
+    private static long previousMouseX;
+    private static long previousMouseY;
+
+    @SubscribeEvent
+    public static void onDrawScreen(GuiScreenEvent.DrawScreenEvent.Post event) {
+        if (notified || !(event.getGui() instanceof MainMenuScreen)) {
+            return;
+        }
+
+        GameSettings gameSettings = Minecraft.getInstance().options;
+        if (!(gameSettings instanceof OptiFineGameSettingsBridge) || !((OptiFineGameSettingsBridge) gameSettings).bridge$isFastRender()) {
+            notified = true;
+            return;
+        }
+
+        if (firstRenderTime == 0) {
+            firstRenderTime = Util.getMillis();
+            previousMouseX = event.getMouseX();
+            previousMouseY = event.getMouseY();
+            return;
+        }
+
+        // Wait for fade in effect
+        if (Util.getMillis() - firstRenderTime < 1000) {
+            return;
+        }
+
+        // Wait for user input
+        if (previousMouseX == event.getMouseX() && previousMouseY == event.getMouseY()) {
+            return;
+        }
+
+        notified = true;
+        Minecraft.getInstance().getToasts().addToast(new SystemToast(
+                SystemToast.Type.TUTORIAL_HINT,
+                new TranslationTextComponent("ccl.optifine.toast.title"),
+                new TranslationTextComponent("ccl.optifine.toast.description")
+        ));
+    }
+}

src/main/java/codechicken/lib/internal/optifine/OptiFinePlugin.java

@@ -0,0 +1,32 @@
+package codechicken.lib.internal.optifine;
+
+import org.objectweb.asm.tree.ClassNode;
+import org.spongepowered.asm.mixin.extensibility.IMixinConfigPlugin;
+import org.spongepowered.asm.mixin.extensibility.IMixinInfo;
+
+import java.util.List;
+import java.util.Set;
+
+public class OptiFinePlugin implements IMixinConfigPlugin {
+
+    private boolean shouldApplyMixin;
+
+    @Override
+    public void onLoad(String mixinPackage) {
+        try {
+            Class.forName("optifine.OptiFineTransformationService", false, Thread.currentThread().getContextClassLoader());
+            this.shouldApplyMixin = true;
+        } catch (Throwable throwable) {
+            // no-op
+        }
+    }
+
+    //@formatter:off
+    @Override public String getRefMapperConfig() { return null; }
+    @Override public boolean shouldApplyMixin(String targetClassName, String mixinClassName) { return shouldApplyMixin; }
+    @Override public void acceptTargets(Set<String> myTargets, Set<String> otherTargets) { }
+    @Override public List<String> getMixins() { return null; }
+    @Override public void preApply(String targetClassName, ClassNode targetClass, String mixinClassName, IMixinInfo mixinInfo) { }
+    @Override public void postApply(String targetClassName, ClassNode targetClass, String mixinClassName, IMixinInfo mixinInfo) { }
+    //@formatter:on
+}

src/main/java/codechicken/lib/internal/optifine/mixin/GameSettingsMixin.java

@@ -0,0 +1,24 @@
+package codechicken.lib.internal.optifine.mixin;
+
+import codechicken.lib.internal.optifine.OptiFineGameSettingsBridge;
+import net.minecraft.client.GameSettings;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+
+@Mixin (GameSettings.class)
+public abstract class GameSettingsMixin implements OptiFineGameSettingsBridge {
+
+    @SuppressWarnings ({"ShadowTarget", "target"})
+    @Shadow (remap = false)
+    private boolean ofFastRender;
+
+    @Override
+    public boolean bridge$isFastRender() {
+        return ofFastRender;
+    }
+
+    @Override
+    public void bridge$setFastRender(boolean value) {
+        this.ofFastRender = value;
+    }
+}

src/main/java/codechicken/lib/internal/optifine/mixin/GuiPerformanceSettingsOFMixin.java

@@ -0,0 +1,64 @@
+package codechicken.lib.internal.optifine.mixin;
+
+import codechicken.lib.internal.optifine.OptiFineGameSettingsBridge;
+import net.minecraft.client.GameSettings;
+import net.minecraft.client.Minecraft;
+import net.minecraft.client.gui.screen.ConfirmScreen;
+import net.minecraft.client.gui.screen.Screen;
+import net.minecraft.client.gui.widget.Widget;
+import net.minecraft.client.gui.widget.button.OptionButton;
+import net.minecraft.client.settings.IteratableOption;
+import net.minecraft.util.text.ITextComponent;
+import net.minecraft.util.text.TranslationTextComponent;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Pseudo;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+
+@Pseudo
+@Mixin (targets = "net.optifine.gui.GuiPerformanceSettingsOF", remap = false)
+public abstract class GuiPerformanceSettingsOFMixin extends Screen {
+
+    public GuiPerformanceSettingsOFMixin(ITextComponent titleIn) {
+        super(titleIn);
+    }
+
+    @SuppressWarnings ("UnresolvedMixinReference")
+    @Inject (
+            method = "actionPerformed",
+            at = @At(
+                    value = "HEAD"
+            )
+    )
+    private void onActionPerformed(Widget widget, CallbackInfo callbackInfo) {
+        if (!(widget instanceof OptionButton)) {
+            return;
+        }
+
+        OptionButton button = (OptionButton) widget;
+        if (!(button.getOption() instanceof IteratableOption)) {
+            return;
+        }
+
+        IteratableOption option = (IteratableOption) button.getOption();
+        if (!(option.getCaption() instanceof TranslationTextComponent)) {
+            return;
+        }
+
+        TranslationTextComponent translation = (TranslationTextComponent) option.getCaption();
+        if (!translation.getKey().equals("of.options.FAST_RENDER")) {
+            return;
+        }
+
+        GameSettings gameSettings = Minecraft.getInstance().options;
+        if (!(gameSettings instanceof OptiFineGameSettingsBridge) || !((OptiFineGameSettingsBridge) gameSettings).bridge$isFastRender()) {
+            return;
+        }
+
+        Minecraft.getInstance().setScreen(new ConfirmScreen(callback -> {
+            ((OptiFineGameSettingsBridge) gameSettings).bridge$setFastRender(callback);
+            Minecraft.getInstance().setScreen(this);
+        }, new TranslationTextComponent("ccl.optifine.confirm.title"), new TranslationTextComponent("ccl.optifine.confirm.description")));
+    }
+}

src/main/resources/META-INF/MANIFEST.MF

@@ -1,3 +1,3 @@
 COMMENT: This file exists purely for dev time,
  anything added here should be mirrored in the build.gradle.
-MixinConfigs: mixins.codechickenlib.json
+MixinConfigs: mixins.codechickenlib.json,mixins.codechickenlib.optifine.json

src/main/resources/META-INF/accesstransformer.cfg

@@ -29,3 +29,6 @@ public-f net.minecraft.client.renderer.BlockRendererDispatcher field_175028_a #
 public-f net.minecraft.client.Minecraft field_175618_aM # blockRenderDispatcher
 public net.minecraft.client.renderer.ItemRenderer func_229114_a_(Lnet/minecraft/client/renderer/model/IBakedModel;Lnet/minecraft/item/ItemStack;IILcom/mojang/blaze3d/matrix/MatrixStack;Lcom/mojang/blaze3d/vertex/IVertexBuilder;)V # renderModel
 public net.minecraft.item.ArmorMaterial field_77882_bY # MAX_DAMAGE_ARRAY
+
+# OptiFine
+public net.minecraft.client.AbstractOption func_243220_a()Lnet/minecraft/util/text/ITextComponent; # getBaseMessageTranslation

src/main/resources/assets/codechickenlib/lang/en_us.json

@@ -6,5 +6,9 @@
 	"ccl.commands.killall.success": "Killed %s entities.",
 	"ccl.commands.killall.success.line": "Killed %s",
 	"ccl.commands.count.fail": "Found no entities.",
-	"ccl.commands.count.total": "Found %s entities."
+	"ccl.commands.count.total": "Found %s entities.",
+	"ccl.optifine.toast.title": "OptiFine Incompatibility",
+	"ccl.optifine.toast.description": "FastRender not supported",
+	"ccl.optifine.confirm.title": "OptiFine Incompatibility",
+	"ccl.optifine.confirm.description": "Enabling Fast Render is known to cause rendering issues for forge mods, Please do not report any graphical errors to mod developers with this option turned on. Ensure that you are able to reproduce graphical errors without Optifine installed.\nAre you sure you wish to proceed?"
 }

src/main/resources/data/codechickenlib/lang/en_us.json

@@ -6,5 +6,9 @@
 	"ccl.commands.killall.success": "Killed %s entities.",
 	"ccl.commands.killall.success.line": "Killed %s",
 	"ccl.commands.count.fail": "Found no entities.",
-	"ccl.commands.count.total": "Found %s entities."
+	"ccl.commands.count.total": "Found %s entities.",
+	"ccl.optifine.toast.title": "OptiFine Incompatibility",
+	"ccl.optifine.toast.description": "FastRender not supported",
+	"ccl.optifine.confirm.title": "OptiFine Incompatibility",
+	"ccl.optifine.confirm.description": "Enabling Fast Render is known to cause rendering issues for forge mods, Please do not report any graphical errors to mod developers with this option turned on. Ensure that you are able to reproduce graphical errors without Optifine installed.\nAre you sure you wish to proceed?"
 }

src/main/resources/mixins.codechickenlib.optifine.json

@@ -0,0 +1,13 @@
+{
+	"required": false,
+	"minVersion": "0.8",
+	"package": "codechicken.lib.internal.optifine.mixin",
+	"refmap": "mixins.codechickenlib.refmap.json",
+	"plugin": "codechicken.lib.internal.optifine.OptiFinePlugin",
+	"target": "@env(DEFAULT)",
+	"compatibilityLevel": "JAVA_8",
+	"client" : [
+		"GameSettingsMixin",
+		"GuiPerformanceSettingsOFMixin"
+	]
+}