Update to 1.21.2

src/main/java/com/replaymod/render/mixin/Mixin_UseGuiFramebufferDuringGuiRendering.java

@@ -0,0 +1,30 @@
+package com.replaymod.render.mixin;
+
+import com.replaymod.render.hooks.MinecraftClientExt;
+import net.minecraft.client.MinecraftClient;
+import net.minecraft.client.gl.Framebuffer;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Unique;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable;
+
+@Mixin(MinecraftClient.class)
+public abstract class Mixin_UseGuiFramebufferDuringGuiRendering implements MinecraftClientExt {
+
+    @Unique
+    private Framebuffer framebufferDelegate;
+
+    @Override
+    public void setFramebufferDelegate(Framebuffer framebuffer) {
+        this.framebufferDelegate = framebuffer;
+    }
+
+    @Inject(method = "getFramebuffer", at = @At("HEAD"), cancellable = true)
+    private void useGuiFramebuffer(CallbackInfoReturnable<Framebuffer> ci) {
+        Framebuffer delegate = this.framebufferDelegate;
+        if (delegate != null) {
+            ci.setReturnValue(delegate);
+        }
+    }
+}