113 lines
2.1 KiB
C++
113 lines
2.1 KiB
C++
|
/*++
|
||
|
|
|
||
|
|
Copyright (c) 2000 Microsoft Corporation
|
||
|
|
|
||
|
|
Module Name:
|
||
|
|
|
||
|
|
ForceDirectDrawEmulation.cpp
|
||
|
|
|
||
|
|
Abstract:
|
||
|
|
|
||
|
|
Some applications don't handle aspects of hardware acceleration correctly.
|
||
|
|
For example, Dragon Lore 2 creates a surface and assumes that the pitch is
|
||
|
|
double the width for 16bpp. However, this is not always the case.
|
||
|
|
DirectDraw exposes this through the lPitch parameter when a surface is
|
||
|
|
locked.
|
||
|
|
|
||
|
|
The fix is to force DirectDraw into emulation, in which case all surfaces
|
||
|
|
will be in system memory and so the pitch really will be related to the
|
||
|
|
width.
|
||
|
|
|
||
|
|
Notes:
|
||
|
|
|
||
|
|
This is a general purpose shim.
|
||
|
|
|
||
|
|
History:
|
||
|
|
|
||
|
|
03/11/2000 linstev Created
|
||
|
|
|
||
|
|
--*/
|
||
|
|
|
||
|
|
#include "precomp.h"
|
||
|
|
|
||
|
|
IMPLEMENT_SHIM_BEGIN(ForceDirectDrawEmulation)
|
||
|
|
#include "ShimHookMacro.h"
|
||
|
|
|
||
|
|
APIHOOK_ENUM_BEGIN
|
||
|
|
APIHOOK_ENUM_ENTRY(RegQueryValueExA)
|
||
|
|
APIHOOK_ENUM_END
|
||
|
|
|
||
|
|
/*++
|
||
|
|
|
||
|
|
Force DirectDraw into emulation.
|
||
|
|
|
||
|
|
--*/
|
||
|
|
|
||
|
|
LONG
|
||
|
|
APIHOOK(RegQueryValueExA)(
|
||
|
|
HKEY hKey,
|
||
|
|
LPSTR lpValueName,
|
||
|
|
LPDWORD lpReserved,
|
||
|
|
LPDWORD lpType,
|
||
|
|
LPBYTE lpData,
|
||
|
|
LPDWORD lpcbData
|
||
|
|
)
|
||
|
|
{
|
||
|
|
if (lpValueName && _stricmp("EmulationOnly", lpValueName) == 0)
|
||
|
|
{
|
||
|
|
LONG lRet = ERROR_SUCCESS;
|
||
|
|
if (lpType)
|
||
|
|
{
|
||
|
|
*lpType = REG_DWORD;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (lpData && !lpcbData)
|
||
|
|
{
|
||
|
|
return ERROR_INVALID_PARAMETER;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (lpData)
|
||
|
|
{
|
||
|
|
if (*lpcbData >= 4)
|
||
|
|
{
|
||
|
|
*((DWORD *)lpData) = 1;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
lRet = ERROR_MORE_DATA;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (lpcbData)
|
||
|
|
{
|
||
|
|
*lpcbData = 4;
|
||
|
|
}
|
||
|
|
|
||
|
|
return lRet;
|
||
|
|
}
|
||
|
|
|
||
|
|
return ORIGINAL_API(RegQueryValueExA)(
|
||
|
|
hKey,
|
||
|
|
lpValueName,
|
||
|
|
lpReserved,
|
||
|
|
lpType,
|
||
|
|
lpData,
|
||
|
|
lpcbData);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*++
|
||
|
|
|
||
|
|
Register hooked functions
|
||
|
|
|
||
|
|
--*/
|
||
|
|
|
||
|
|
HOOK_BEGIN
|
||
|
|
|
||
|
|
APIHOOK_ENTRY(ADVAPI32.DLL, RegQueryValueExA)
|
||
|
|
|
||
|
|
HOOK_END
|
||
|
|
|
||
|
|
|
||
|
|
IMPLEMENT_SHIM_END
|
||
|
|
|