Hooking DX9 Present & Reset

[exp111]

Hey,

I've started now writing some stuff for MW2 and I now wanted to make a gui/ingame menu.
As I like the ImGui menus (and have some menus already written for it) and wanted to use it here to.

The problem is I just can't seem to get it working.
I'm swapping the pointer to the original present/reset to my own functions (in the gameoverlayrenderer.dll) but they don't seem to get called.

My code to swap them (should work for all dx9 games):

Hooks::present_addr = FindPattern("gameoverlayrenderer.dll", Signatures::Present) + 2;
Hooks::reset_addr = FindPattern("gameoverlayrenderer.dll", Signatures::Reset) + 2;

Hooks::original_present = **reinterpret_cast<decltype(&Hooks::original_present)*>(Hooks::present_addr);
Hooks::original_reset = **reinterpret_cast<decltype(&Hooks::original_reset)*>(Hooks::reset_addr);

**reinterpret_cast<void***>(Hooks::present_addr) = reinterpret_cast<void*>(&Hooks::user_present);
**reinterpret_cast<void***>(Hooks::reset_addr) = reinterpret_cast<void*>(&Hooks::user_reset);

The original functions addresses are found but it doesn't get called. It's weird as the Steam overlay works fine

Did anyone get it an ImGui menu working? Appreciate any help

[moofmonkey]

Sorry if late, but there's some info.
1. Hook release in GameOverlayRenderer64.dll \x48\x89\x05\xCC\xCC\xCC\xCC\x48\x8D\x15\xCC\xCC\x CC\xCC\x48\x8B\x4B\x68 xxx????xxx????xxxx (x64 pattern for variable reference)
2. Do things here: init WndProc, hook EndScene, etc.
For me that code is... (comments aren't mine)

ULONG __stdcall hkRelease(IDirect3DDevice9* thisptr) {
	// Perform general setup tasks when this function is called for the first time.
	static bool is_initialized = false;
	static bool init_running = false;

	if (!is_initialized) {
		while (init_running) Sleep(40);
		if (is_initialized) goto skip;
		init_running = true;

		static HWND console_hwnd = GetConsoleHwnd();
		EnumWindows([](HWND hwnd, LPARAM game_pid) -> BOOL {
			// Skip windows not belonging to the game process.
			DWORD hwnd_pid = NULL;

			GetWindowThreadProcessId(hwnd, &hwnd_pid);

			if (hwnd_pid != game_pid || hwnd == console_hwnd)
				return TRUE;

			// Set the target window handle and stop the callback.
			game_hwnd = hwnd;

			return FALSE;
		}, GetCurrentProcessId());

		if (game_hwnd != NULL) {
			// Swap out the window message handler for our own, allowing us to intercept input events.
			game_wndproc = reinterpret_cast<WNDPROC>(SetWindowLongPtr(game_hwnd, GWLP_WNDPROC, LONG_PTR(hkWndProc)));
			g_pRenderer = new Renderer(thisptr);
			pOriginalRender = (HRESULT(__stdcall*)(IDirect3DDevice9*)) DetourPointer(pOriginalRender_Restore = *(void***)thisptr + 42, hkRender); // endscene

			// Perform final ImGui setup tasks and..
			ImGui_ImplDX9_Init(game_hwnd, thisptr);

			// ..we're all done!
			is_initialized = true;
		}
		init_running = false;
		skip:;
	}

	return pOriginalRelease(thisptr);
}

3. ???
4. PROFIT