From 78048b70b92e7eadb4d8f8641f8c57e41c0d1cba Mon Sep 17 00:00:00 2001
From: LostLuma <lilly@lostluma.net>
Date: Sat, 2 Sep 2023 15:37:18 +0200
Subject: [PATCH] Add information about reduced frame rate to debug screen

---
 .../impl/mixin/DebugScreenOverlayMixin.java   | 31 +++++++++++++++++++
 src/main/resources/dynamic_fps.mixins.json    |  1 +
 2 files changed, 32 insertions(+)
 create mode 100644 src/main/java/dynamic_fps/impl/mixin/DebugScreenOverlayMixin.java

diff --git a/src/main/java/dynamic_fps/impl/mixin/DebugScreenOverlayMixin.java b/src/main/java/dynamic_fps/impl/mixin/DebugScreenOverlayMixin.java
new file mode 100644
index 00000000..1565ad04
--- /dev/null
+++ b/src/main/java/dynamic_fps/impl/mixin/DebugScreenOverlayMixin.java
@@ -0,0 +1,31 @@
+package dynamic_fps.impl.mixin;
+
+import java.util.List;
+import java.util.Locale;
+
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable;
+
+import dynamic_fps.impl.DynamicFPSMod;
+import dynamic_fps.impl.PowerState;
+import net.minecraft.client.gui.components.DebugScreenOverlay;
+
+@Mixin(DebugScreenOverlay.class)
+public class DebugScreenOverlayMixin {
+	/*
+	 * Insert information about effective frame rate below misleading FPS counter.
+	 */
+	@Inject(method = "getGameInformation", at = @At("RETURN"))
+	private void onGetGameInformation(CallbackInfoReturnable<List<String>> callbackInfo) {
+		var status = DynamicFPSMod.powerState();
+
+		if (status != PowerState.FOCUSED) {
+			var result = callbackInfo.getReturnValue();
+			int target = DynamicFPSMod.targetFrameRate();
+
+			result.add(2, String.format(Locale.ROOT, "§c[Dynamic FPS] FPS: %s P: %s§r", target, status.toString().toLowerCase()));
+		}
+	}
+}
diff --git a/src/main/resources/dynamic_fps.mixins.json b/src/main/resources/dynamic_fps.mixins.json
index ca49df0a..3c29163e 100644
--- a/src/main/resources/dynamic_fps.mixins.json
+++ b/src/main/resources/dynamic_fps.mixins.json
@@ -4,6 +4,7 @@
 	"compatibilityLevel": "JAVA_17",
 	"mixins": [],
 	"client": [
+		"DebugScreenOverlayMixin",
 		"GameRendererMixin",
 		"GuiMixin",
 		"LoadingOverlayMixin",