From f1a78c8469c54abf2b78bb321847fb196ed59f4c Mon Sep 17 00:00:00 2001
From: CrazyRedMachine <crazyredmachine86@gmail.com>
Date: Thu, 23 May 2024 22:22:20 +0200
Subject: [PATCH] high framerate patch

---
 dist/popnhax/popnhax.xml |  4 ++++
 popnhax/config.h         |  1 +
 popnhax/dllmain.cc       | 36 ++++++++++++++++++++++++++++++++++++
 3 files changed, 41 insertions(+)

diff --git a/dist/popnhax/popnhax.xml b/dist/popnhax/popnhax.xml
index cdd49d5..338c1db 100644
--- a/dist/popnhax/popnhax.xml
+++ b/dist/popnhax/popnhax.xml
@@ -18,6 +18,10 @@
     <!-- Handle favorites through data_mods/<game>.<friendID>.fav files (Note: allows UNLIMITED favorites as well as favorites without an account/server) -->
     <local_favorites __type="bool">0</local_favorites>
 
+  <!-- Framerate -->
+    <!-- Maximize framerate and fix animation speed for a smoother experience (lower visual latency) -->
+    <high_framerate __type="bool">0</high_framerate>
+
   <!-- Classic patches -->
     <!-- Prevent crash on boot when using a different default audio source (aka HDMI audio patch) -->
     <audio_source_fix __type="bool">0</audio_source_fix>
diff --git a/popnhax/config.h b/popnhax/config.h
index 0014780..851e1aa 100644
--- a/popnhax/config.h
+++ b/popnhax/config.h
@@ -65,6 +65,7 @@ struct popnhax_config {
     char custom_track_title_format2[64];
     bool exclude_omni;
     bool partial_entries;
+    bool high_framerate;
 };
 
 #endif
diff --git a/popnhax/dllmain.cc b/popnhax/dllmain.cc
index 44825a5..da984b3 100644
--- a/popnhax/dllmain.cc
+++ b/popnhax/dllmain.cc
@@ -210,6 +210,8 @@ PSMAP_MEMBER_REQ(PSMAP_PROPERTY_TYPE_BOOL, struct popnhax_config, local_favorite
                  "/popnhax/local_favorites")
 PSMAP_MEMBER_REQ(PSMAP_PROPERTY_TYPE_BOOL, struct popnhax_config, ignore_music_limit,
                  "/popnhax/ignore_music_limit")
+PSMAP_MEMBER_REQ(PSMAP_PROPERTY_TYPE_BOOL, struct popnhax_config, high_framerate,
+                 "/popnhax/high_framerate")
 PSMAP_END
 
 enum BufferIndexes {
@@ -7437,6 +7439,34 @@ static bool get_music_limit_from_file(const char *filepath, uint32_t *limit){
     return true;
 }
 
+static bool patch_afp_framerate()
+{
+    DEVMODE lpDevMode;
+    memset(&lpDevMode, 0, sizeof(DEVMODE));
+    lpDevMode.dmSize = sizeof(DEVMODE);
+    lpDevMode.dmDriverExtra = 0;
+
+    if ( EnumDisplaySettings(NULL, ENUM_CURRENT_SETTINGS, &lpDevMode) != 0 )
+    {
+        DWORD framerate = lpDevMode.dmDisplayFrequency;
+        float new_value = 1./framerate;
+
+        char *as_hex = (char*)&new_value;
+
+        if ( !find_and_patch_hex(g_game_dll_fn, "\x82\x9D\x88\x3C", 4, 0, as_hex, 4) )
+        {
+            LOG("popnhax: high_framerate: cannot patch animation speed\n");
+            return false;
+        }
+
+        LOG("popnhax: high_framerate: patched animation speed for %ldHz\n", framerate); 
+        return true;
+    }
+
+    LOG("popnhax: high_framerate: could not retrieve display mode\n"); 
+    return false;
+}
+
 BOOL APIENTRY DllMain(HMODULE hModule, DWORD ul_reason_for_call, LPVOID lpReserved) {
     switch (ul_reason_for_call) {
     case DLL_PROCESS_ATTACH: {
@@ -7816,6 +7846,12 @@ BOOL APIENTRY DllMain(HMODULE hModule, DWORD ul_reason_for_call, LPVOID lpReserv
         if (config.guidese_off)
             option_guide_se_off();
 
+        if (config.high_framerate)
+        {
+            patch_afp_framerate();
+            config.fps_uncap = true;
+        }
+
         if (config.fps_uncap)
             patch_fps_uncap();