Add support for FREX Flawless Frames API (fixes #150)

src/main/java/com/replaymod/render/hooks/ForceChunkLoadingHook.java

@@ -1,5 +1,6 @@
 package com.replaymod.render.hooks;
 
+import com.replaymod.render.utils.FlawlessFrames;
 import net.minecraft.client.render.WorldRenderer;
 
 public class ForceChunkLoadingHook {
@@ -9,11 +10,13 @@ public class ForceChunkLoadingHook {
     public ForceChunkLoadingHook(WorldRenderer renderGlobal) {
         this.hooked = renderGlobal;
 
+        FlawlessFrames.setEnabled(true);
         IForceChunkLoading.from(renderGlobal).replayModRender_setHook(this);
     }
 
     public void uninstall() {
         IForceChunkLoading.from(hooked).replayModRender_setHook(null);
+        FlawlessFrames.setEnabled(false);
     }
 
     public interface IBlockOnChunkRebuilds {

src/main/java/com/replaymod/render/rendering/VideoRenderer.java

@@ -23,6 +23,7 @@ import com.replaymod.render.hooks.ForceChunkLoadingHook;
 import com.replaymod.render.metadata.MetadataInjector;
 import com.replaymod.render.mixin.MainWindowAccessor;
 import com.replaymod.render.mixin.WorldRendererAccessor;
+import com.replaymod.render.utils.FlawlessFrames;
 import com.replaymod.replay.ReplayHandler;
 import com.replaymod.replaystudio.pathing.path.Keyframe;
 import com.replaymod.replaystudio.pathing.path.Path;
@@ -707,11 +708,11 @@ public class VideoRenderer implements RenderInfo {
 
     public static String[] checkCompat(RenderSettings settings) {
         //#if FABRIC>=1
-        if (net.fabricmc.loader.api.FabricLoader.getInstance().isModLoaded("sodium")) {
+        if (net.fabricmc.loader.api.FabricLoader.getInstance().isModLoaded("sodium") && !FlawlessFrames.hasSodium()) {
             return new String[] {
-                    "Rendering is not currently supported while Sodium is installed.",
-                    "See https://github.com/ReplayMod/ReplayMod/issues/150",
-                    "For now, you need to uninstall Sodium before rendering!"
+                    "Rendering is not supported with your Sodium version.",
+                    "It is missing support for the FREX Flawless Frames API.",
+                    "Either update to the latest version or uninstall Sodium before rendering!",
             };
         }
         //#if MC>=11700
@@ -721,7 +722,6 @@ public class VideoRenderer implements RenderInfo {
         //$$             "ODS export requires Iris to be installed for Minecraft 1.17 and above.",
         //$$             "Note that it is nevertheless incompatible with other shaders and will simply replace them.",
         //$$             "Get it from: https://irisshaders.net/",
-        //$$             "Use the Standalone version! Sodium is not currently compatible with rendering!",
         //$$     };
         //$$ }
         //#endif

src/main/java/com/replaymod/render/utils/FlawlessFrames.java

@@ -0,0 +1,40 @@
+package com.replaymod.render.utils;
+
+import java.util.List;
+import java.util.concurrent.CopyOnWriteArrayList;
+import java.util.function.Consumer;
+import java.util.function.Function;
+
+import static com.replaymod.core.ReplayMod.MOD_ID;
+
+/**
+ * Uses the "Flawless Frames" FREX feature which allows us to instruct third-party mods to sacrifice performance (even
+ * beyond the point where it can no longer achieve interactive frame rates) in exchange for a noticeable boost to
+ * quality.
+ * In particular also to force-load all chunks with Canvas/Sodium/Bobby.
+ *
+ * See https://github.com/grondag/frex/pull/9
+ */
+public class FlawlessFrames {
+    private static final List<Consumer<Boolean>> CONSUMERS = new CopyOnWriteArrayList<>();
+    private static boolean hasSodium;
+
+    private FlawlessFrames() {}
+
+    public static void registerConsumer(Function<String, Consumer<Boolean>> provider) {
+        Consumer<Boolean> consumer = provider.apply(MOD_ID);
+        CONSUMERS.add(consumer);
+
+        if (provider.getClass().getName().contains(".sodium.") || consumer.getClass().getName().contains(".sodium.")) {
+            hasSodium = true;
+        }
+    }
+
+    public static void setEnabled(boolean enabled) {
+        CONSUMERS.forEach(it -> it.accept(enabled));
+    }
+
+    public static boolean hasSodium() {
+        return hasSodium;
+    }
+}