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Simplyfy D3D8 Hook and enable hooking at runtime instead of only at launch

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This commit is contained in:
Daniel S. 2019-11-20 20:46:58 +01:00
parent 8c1acb3e85
commit 1f83c25129
1 changed files with 10 additions and 33 deletions
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41
ScrapHacks/ScrapHack/D3D8_Hook.h
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@ -1,6 +1,8 @@
#pragma once #pragma once
#include <Windows.h>
#include <d3d8.h> #include <d3d8.h>
#include <d3dx8.h> #include <d3dx8.h>
#include <dxerr8.h>
uintmax_t frame = 0; uintmax_t frame = 0;
DWORD *GetVTable(void *addr) DWORD *GetVTable(void *addr)
{ {
@ -53,37 +55,6 @@ HRESULT WINAPI H_EndScene(LPDIRECT3DDEVICE8 dev)
return hook->func<t_func>(Render(dev)); return hook->func<t_func>(Render(dev));
} }
HRESULT WINAPI H_CreateDevice(void *pDirect3D, unsigned int uiAdapter, D3DDEVTYPE pDeviceType, HWND hFocusWindow,
unsigned long ulBehaviorFlags, D3DPRESENT_PARAMETERS *pPresentationParameters,
LPDIRECT3DDEVICE8 *ppReturnedDeviceInterface)
{
typedef HRESULT(WINAPI * t_func)(void *, unsigned int, D3DDEVTYPE, HWND, unsigned long, D3DPRESENT_PARAMETERS *, LPDIRECT3DDEVICE8 *);
shared_ptr<Hook> hook = Hook::get(H_CreateDevice);
HRESULT ret = hook->func<t_func>(pDirect3D, uiAdapter, pDeviceType, hFocusWindow, ulBehaviorFlags, pPresentationParameters, ppReturnedDeviceInterface);
cout << "CreateDevice -> " << ret << endl;
void *EndScene = reinterpret_cast<void *>(GetVTable(ppReturnedDeviceInterface[0])[35]);
cout << "EndScene @ " << EndScene << endl; // EndScene
Hook::addr(EndScene, H_EndScene);
Hook::drop(H_CreateDevice);
return ret;
}
LPDIRECT3D8 WINAPI H_Direct3DCreate8(unsigned int SDKVersion)
{
typedef LPDIRECT3D8(_stdcall * t_func)(unsigned int);
shared_ptr<Hook> hook = Hook::get(H_Direct3DCreate8);
LPDIRECT3D8 ret = hook->func<t_func>(SDKVersion);
cout << "D3D8-Create: " << SDKVersion << " -> " << ret << endl;
void *CreateDevice = reinterpret_cast<void *>(GetVTable(ret)[15]);
void *Release = reinterpret_cast<void *>(GetVTable(ret)[2]);
cout << "CreateDevice @ " << CreateDevice << endl; // CreateDevice
Hook::addr(CreateDevice, H_CreateDevice);
Hook::drop(H_Direct3DCreate8);
return ret;
}
void unhook_d3d8() void unhook_d3d8()
{ {
if (hFont != INVALID_HANDLE_VALUE) if (hFont != INVALID_HANDLE_VALUE)
@ -99,7 +70,13 @@ void unhook_d3d8()
void hook_d3d8() void hook_d3d8()
{ {
typedef void(_cdecl * t_func)();
hFont = CreateFont(20, 0, 0, 0, FW_BOLD, 0, 0, 0, ANSI_CHARSET, 0, 0, 0, 0, "Verdana"); hFont = CreateFont(20, 0, 0, 0, FW_BOLD, 0, 0, 0, ANSI_CHARSET, 0, 0, 0, 0, "Verdana");
hBrush = CreateSolidBrush(D3DCOLOR_ARGB(25, 0, 0, 0)); hBrush = CreateSolidBrush(D3DCOLOR_ARGB(25, 0, 0, 0));
Hook::module("d3d8.dll", "Direct3DCreate8", H_Direct3DCreate8); Hook::addr(ptr<void>(0x853954,0x2a3d8,0,4*35,0),H_EndScene);
shared_ptr<Hook> hook = Hook::get(hook_d3d8);
hook->func_void<t_func>();
hook->disable();
Hook::drop(hook_d3d8);
return;
} }