Popn_Tools/popnhax
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high_framerate: half timer speed

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CrazyRedMachine 2024-07-14 22:27:35 +02:00
parent 7f98200729
commit fbe248f880
1 changed files with 38 additions and 0 deletions
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38
popnhax/dllmain.cc
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@ -7856,6 +7856,43 @@ static bool get_music_limit_from_file(const char *filepath, uint32_t *limit){
return true;
}
bool g_timer_flipflop = 0;
void (*real_timer_increase)(void);
void hook_timer_increase()
{
__asm("cmp byte ptr [_g_timer_flipflop], 0\n");
__asm("je skip_cancel_increase\n");
__asm("dec dword ptr [ebp+0x44]\n");
__asm("dec byte ptr [_g_timer_flipflop]\n"); // 1 -> 0
__asm("jmp leave_timer_increase_hook\n");
__asm("skip_cancel_increase:\n");
__asm("inc byte ptr [_g_timer_flipflop]\n"); // 0 -> 1
__asm("leave_timer_increase_hook:\n");
real_timer_increase();
}
static bool patch_half_timer_speed()
{
DWORD dllSize = 0;
char *data = getDllData(g_game_dll_fn, &dllSize);
{
int64_t pattern_offset = search(data, dllSize, "\xFF\x45\x44\x3B\x75\x04", 6, 0);
if (pattern_offset == -1) {
LOG("popnhax: high_framerate: cannot find timer increase function\n");
return false;
}
uint64_t patch_addr = (int64_t)data + pattern_offset + 0x03;
MH_CreateHook((LPVOID)patch_addr, (LPVOID)hook_timer_increase,
(void **)&real_timer_increase);
}
LOG("popnhax: high_framerate: halve timer speed\n");
return true;
}
static bool patch_afp_framerate(uint16_t fps)
{
DWORD framerate = fps;
@ -8323,6 +8360,7 @@ BOOL APIENTRY DllMain(HMODULE hModule, DWORD ul_reason_for_call, LPVOID lpReserv
if (config.high_framerate)
{
patch_afp_framerate(config.high_framerate_fps);
patch_half_timer_speed();
config.fps_uncap = true;
}