From 7bc28a25d846931a784f85e04d130b0e7ebe2971 Mon Sep 17 00:00:00 2001
From: PeachyPeach <72323920+PeachyPeachSM64@users.noreply.github.com>
Date: Thu, 20 Nov 2025 02:44:43 +0100
Subject: [PATCH] Fix HOOK_ON_HUD_RENDER rate at 30hz (#1022)

---
 src/pc/djui/djui.c | 20 +++++++++++++++++++-
 1 file changed, 19 insertions(+), 1 deletion(-)

diff --git a/src/pc/djui/djui.c b/src/pc/djui/djui.c
index 37145208f..5c79ff3c6 100644
--- a/src/pc/djui/djui.c
+++ b/src/pc/djui/djui.c
@@ -18,6 +18,8 @@
 #include "pc/utils/misc.h"
 
 static Gfx* sSavedDisplayListHead = NULL;
+static Gfx* sHookHudRenderGfx = NULL;
+static size_t sHookHudRenderGfxSize = 0;
 
 struct DjuiRoot* gDjuiRoot = NULL;
 struct DjuiText* gDjuiPauseOptions = NULL;
@@ -187,7 +189,23 @@ void djui_render(void) {
         djui_base_render(&sDjuiRootBehind->base);
     }
 
-    smlua_call_event_hooks(HOOK_ON_HUD_RENDER, djui_reset_hud_params);
+    // To maintain consistency with other hooks, HOOK_ON_HUD_RENDER must run at 30 fps
+    // During interpolated frames, copy the generated display list without running the hook again
+    if (!sDjuiRendered60fps) {
+        Gfx *hookHudRenderStart = gDisplayListHead;
+        smlua_call_event_hooks(HOOK_ON_HUD_RENDER, djui_reset_hud_params);
+        size_t gfxSize = sizeof(Gfx) * (gDisplayListHead - hookHudRenderStart);
+        if (gfxSize > 0) {
+            if (gfxSize > sHookHudRenderGfxSize) {
+                sHookHudRenderGfx = realloc(sHookHudRenderGfx, gfxSize);
+            }
+            memcpy(sHookHudRenderGfx, hookHudRenderStart, gfxSize);
+        }
+        sHookHudRenderGfxSize = gfxSize;
+    } else if (sHookHudRenderGfx != NULL && sHookHudRenderGfxSize > 0) {
+        memcpy(gDisplayListHead, sHookHudRenderGfx, sHookHudRenderGfxSize);
+        gDisplayListHead += sHookHudRenderGfxSize / sizeof(Gfx);
+    }
 
     djui_panel_update();
     djui_popup_update();