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#39 hook GetDeviceCaps - fixes graphcial glitches for Megaman X4

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FunkyFr3sh 2020-09-17 05:49:36 +02:00
parent bbd67907c0
commit 4e6ecfe37c
4 changed files with 16 additions and 0 deletions
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2
inc/hook.h
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@ -23,6 +23,7 @@ typedef LONG (WINAPI* SETWINDOWLONGAPROC)(HWND, int, LONG);
typedef BOOL (WINAPI* ENABLEWINDOWPROC)(HWND, BOOL);
typedef HWND (WINAPI* CREATEWINDOWEXAPROC)(DWORD, LPCSTR, LPCSTR, DWORD, int, int, int, int, HWND, HMENU, HINSTANCE, LPVOID);
typedef BOOL (WINAPI* DESTROYWINDOWPROC)(HWND);
typedef BOOL(WINAPI* GETDEVICECAPSPROC)(HDC, int);
extern GETCURSORPOSPROC real_GetCursorPos;
extern CLIPCURSORPROC real_ClipCursor;
@ -44,6 +45,7 @@ extern SETWINDOWLONGAPROC real_SetWindowLongA;
extern ENABLEWINDOWPROC real_EnableWindow;
extern CREATEWINDOWEXAPROC real_CreateWindowExA;
extern DESTROYWINDOWPROC real_DestroyWindow;
extern GETDEVICECAPSPROC real_GetDeviceCaps;
extern int HookingMethod;
extern BOOL Hook_Active;

1
inc/mouse.h
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@ -25,6 +25,7 @@ LRESULT WINAPI fake_SendMessageA(HWND hWnd, UINT Msg, WPARAM wParam, LPARAM lPar
LONG WINAPI fake_SetWindowLongA(HWND hWnd, int nIndex, LONG dwNewLong);
BOOL WINAPI fake_EnableWindow(HWND hWnd, BOOL bEnable);
BOOL WINAPI fake_DestroyWindow(HWND hWnd);
int WINAPI fake_GetDeviceCaps(HDC hdc, int index);
HWND WINAPI fake_CreateWindowExA(
DWORD dwExStyle, LPCSTR lpClassName, LPCSTR lpWindowName, DWORD dwStyle, int X, int Y,
int nWidth, int nHeight, HWND hWndParent, HMENU hMenu, HINSTANCE hInstance, LPVOID lpParam);

3
src/hook.c
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@ -30,6 +30,7 @@ SETWINDOWLONGAPROC real_SetWindowLongA = SetWindowLongA;
ENABLEWINDOWPROC real_EnableWindow = EnableWindow;
CREATEWINDOWEXAPROC real_CreateWindowExA = CreateWindowExA;
DESTROYWINDOWPROC real_DestroyWindow = DestroyWindow;
GETDEVICECAPSPROC real_GetDeviceCaps = GetDeviceCaps;
void Hook_PatchIAT(HMODULE hMod, char *moduleName, char *functionName, PROC newFunction)
@ -164,6 +165,7 @@ void Hook_Init()
Hook_Create("user32.dll", "EnableWindow", (PROC)fake_EnableWindow, (PROC *)&real_EnableWindow);
Hook_Create("user32.dll", "CreateWindowExA", (PROC)fake_CreateWindowExA, (PROC *)&real_CreateWindowExA);
Hook_Create("user32.dll", "DestroyWindow", (PROC)fake_DestroyWindow, (PROC *)&real_DestroyWindow);
Hook_Create("gdi.dll", "GetDeviceCaps ", (PROC)fake_GetDeviceCaps, (PROC*)&real_GetDeviceCaps);
}
}
@ -193,5 +195,6 @@ void Hook_Exit()
Hook_Revert("user32.dll", "EnableWindow", (PROC)fake_EnableWindow, (PROC *)&real_EnableWindow);
Hook_Revert("user32.dll", "CreateWindowExA", (PROC)fake_CreateWindowExA, (PROC *)&real_CreateWindowExA);
Hook_Revert("user32.dll", "DestroyWindow", (PROC)fake_DestroyWindow, (PROC *)&real_DestroyWindow);
Hook_Revert("gdi.dll", "GetDeviceCaps", (PROC)fake_GetDeviceCaps, (PROC*)&real_GetDeviceCaps);
}
}

10
src/mouse.c
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@ -422,6 +422,16 @@ BOOL WINAPI fake_EnableWindow(HWND hWnd, BOOL bEnable)
return real_EnableWindow(hWnd, bEnable);
}
int WINAPI fake_GetDeviceCaps(HDC hdc, int index)
{
if (ddraw && ddraw->bpp && index == BITSPIXEL)
{
return ddraw->bpp;
}
return real_GetDeviceCaps(hdc, index);
}
BOOL WINAPI fake_DestroyWindow(HWND hWnd)
{
BOOL result = real_DestroyWindow(hWnd);