wine/dlls/ddraw/surface_user.c
2006-05-23 14:11:13 +02:00

676 lines
20 KiB
C

/* User-based primary surface driver
*
* Copyright 2000-2001 TransGaming Technologies Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "config.h"
#include <assert.h>
#include <stdlib.h>
#include <string.h>
#include "winerror.h"
#include "wine/debug.h"
#include "ddraw_private.h"
WINE_DEFAULT_DEBUG_CHANNEL(ddraw);
/* if you use OWN_WINDOW, don't use SYNC_UPDATE, or you may get trouble */
/* #define SYNC_UPDATE */
/*
* FIXME: This does not work any more because the created window has its own
* thread queue that cannot be manipulated by application threads.
* #define OWN_WINDOW
*/
#ifdef OWN_WINDOW
static void User_create_own_window(IDirectDrawSurfaceImpl* This);
static void User_destroy_own_window(IDirectDrawSurfaceImpl* This);
#endif
#ifndef SYNC_UPDATE
static DWORD CALLBACK User_update_thread(LPVOID);
#endif
static void User_copy_to_screen(IDirectDrawSurfaceImpl* This, LPCRECT rc);
static HWND get_display_window(IDirectDrawSurfaceImpl* This, LPPOINT pt);
static const IDirectDrawSurface7Vtbl User_IDirectDrawSurface7_VTable;
HRESULT
User_DirectDrawSurface_Construct(IDirectDrawSurfaceImpl* This,
IDirectDrawImpl* pDD,
const DDSURFACEDESC2* pDDSD)
{
USER_PRIV_VAR(priv, This);
HRESULT hr;
TRACE("(%p,%p,%p)\n",This,pDD,pDDSD);
hr = DIB_DirectDrawSurface_Construct(This, pDD, pDDSD);
if (FAILED(hr)) return hr;
ICOM_INIT_INTERFACE(This, IDirectDrawSurface7,
User_IDirectDrawSurface7_VTable);
This->final_release = User_DirectDrawSurface_final_release;
This->duplicate_surface = User_DirectDrawSurface_duplicate_surface;
This->lock_update = User_DirectDrawSurface_lock_update;
This->unlock_update = User_DirectDrawSurface_unlock_update;
This->flip_data = User_DirectDrawSurface_flip_data;
This->flip_update = User_DirectDrawSurface_flip_update;
This->get_dc = User_DirectDrawSurface_get_dc;
This->release_dc = User_DirectDrawSurface_release_dc;
This->set_palette = User_DirectDrawSurface_set_palette;
This->update_palette = User_DirectDrawSurface_update_palette;
This->get_gamma_ramp = User_DirectDrawSurface_get_gamma_ramp;
This->set_gamma_ramp = User_DirectDrawSurface_set_gamma_ramp;
This->get_display_window = User_DirectDrawSurface_get_display_window;
if (This->surface_desc.ddsCaps.dwCaps & DDSCAPS_PRIMARYSURFACE)
{
#ifdef OWN_WINDOW
DirectDrawSurface_RegisterClass();
#endif
#ifndef SYNC_UPDATE
InitializeCriticalSection(&priv->user.crit);
priv->user.refresh_event = CreateEventW(NULL, TRUE, FALSE, NULL);
priv->user.update_event = CreateEventW(NULL, FALSE, FALSE, NULL);
priv->user.update_thread = CreateThread(NULL, 0, User_update_thread, This, 0, NULL);
#ifdef OWN_WINDOW
if (This->ddraw_owner->cooperative_level & DDSCL_FULLSCREEN) {
/* wait for window creation (or update thread destruction) */
while (WaitForMultipleObjects(1, &priv->user.update_thread, FALSE, 100) == WAIT_TIMEOUT)
if (This->more.lpDDRAWReserved) break;
if (!This->more.lpDDRAWReserved) {
ERR("window creation failed\n");
}
}
#endif
#else
#ifdef OWN_WINDOW
User_create_own_window(This);
#endif
#endif
if (!This->more.lpDDRAWReserved)
This->more.lpDDRAWReserved = (LPVOID)pDD->window;
}
return DIB_DirectDrawSurface_alloc_dc(This, &priv->user.cached_dc);
}
HRESULT
User_DirectDrawSurface_Create(IDirectDrawImpl *pDD,
const DDSURFACEDESC2 *pDDSD,
LPDIRECTDRAWSURFACE7 *ppSurf,
IUnknown *pUnkOuter)
{
IDirectDrawSurfaceImpl* This;
HRESULT hr;
assert(pUnkOuter == NULL);
This = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY,
sizeof(*This) + sizeof(User_DirectDrawSurfaceImpl));
if (This == NULL) return E_OUTOFMEMORY;
This->private = (User_DirectDrawSurfaceImpl*)(This+1);
hr = User_DirectDrawSurface_Construct(This, pDD, pDDSD);
if (FAILED(hr))
HeapFree(GetProcessHeap(), 0, This);
else
*ppSurf = ICOM_INTERFACE(This, IDirectDrawSurface7);
return hr;
}
void User_DirectDrawSurface_final_release(IDirectDrawSurfaceImpl* This)
{
USER_PRIV_VAR(priv, This);
if (This->surface_desc.ddsCaps.dwCaps & DDSCAPS_PRIMARYSURFACE)
{
#ifndef SYNC_UPDATE
HANDLE event = priv->user.update_event;
priv->user.update_event = 0;
SetEvent(event);
TRACE("waiting for update thread to terminate...\n");
#ifdef OWN_WINDOW
/* dispatch any waiting sendmessages */
{
MSG msg;
PeekMessageA(&msg, 0, 0, 0, PM_NOREMOVE);
}
/* to avoid deadlocks, allow SendMessages from update thread
* through while we wait for it */
while (MsgWaitForMultipleObjects(1, &priv->user.update_thread, FALSE,
INFINITE, QS_SENDMESSAGE) == WAIT_OBJECT_0+1)
{
MSG msg;
PeekMessageA(&msg, 0, 0, 0, PM_NOREMOVE);
}
#else
WaitForSingleObject(priv->user.update_thread,INFINITE);
#endif
TRACE("update thread terminated\n");
CloseHandle(event);
CloseHandle(priv->user.update_thread);
CloseHandle(priv->user.refresh_event);
DeleteCriticalSection(&priv->user.crit);
#else
#ifdef OWN_WINDOW
User_destroy_own_window(This);
#endif
#endif
This->more.lpDDRAWReserved = 0;
#ifdef OWN_WINDOW
DirectDrawSurface_UnregisterClass();
#endif
}
DIB_DirectDrawSurface_free_dc(This, priv->user.cached_dc);
DIB_DirectDrawSurface_final_release(This);
}
static int User_DirectDrawSurface_init_wait(IDirectDrawSurfaceImpl* This)
{
USER_PRIV_VAR(priv, This);
int need_wait;
EnterCriticalSection(&priv->user.crit);
priv->user.wait_count++;
need_wait = priv->user.in_refresh;
LeaveCriticalSection(&priv->user.crit);
return need_wait;
}
static void User_DirectDrawSurface_end_wait(IDirectDrawSurfaceImpl* This)
{
USER_PRIV_VAR(priv, This);
EnterCriticalSection(&priv->user.crit);
if (!--priv->user.wait_count)
ResetEvent(priv->user.refresh_event);
LeaveCriticalSection(&priv->user.crit);
}
static void User_DirectDrawSurface_wait_update(IDirectDrawSurfaceImpl* This)
{
USER_PRIV_VAR(priv, This);
if (priv->user.in_refresh) {
if (User_DirectDrawSurface_init_wait(This))
WaitForSingleObject(priv->user.refresh_event, 2);
User_DirectDrawSurface_end_wait(This);
}
}
void User_DirectDrawSurface_lock_update(IDirectDrawSurfaceImpl* This,
LPCRECT pRect, DWORD dwFlags)
{
#if 0
if (!(dwFlags & DDLOCK_WRITEONLY))
User_copy_from_screen(This, pRect);
#endif
if (dwFlags & DDLOCK_WAIT) User_DirectDrawSurface_wait_update(This);
if (pRect) {
This->lastlockrect = *pRect;
} else {
This->lastlockrect.left = This->lastlockrect.right = 0;
}
}
void User_DirectDrawSurface_unlock_update(IDirectDrawSurfaceImpl* This,
LPCRECT pRect)
{
if (This->surface_desc.ddsCaps.dwCaps & DDSCAPS_PRIMARYSURFACE)
{
#ifdef SYNC_UPDATE
User_copy_to_screen(This, pRect);
#else
USER_PRIV_VAR(priv, This);
SetEvent(priv->user.update_event);
#endif
}
}
void User_DirectDrawSurface_set_palette(IDirectDrawSurfaceImpl* This,
IDirectDrawPaletteImpl* pal)
{
USER_PRIV_VAR(priv, This);
if (!pal) {
FIXME("selecting null palette\n");
/* I don't think selecting GDI object 0 will work, we should select
* the original palette, returned by the first SelectPalette */
SelectPalette(priv->user.cached_dc, 0, FALSE);
return;
}
SelectPalette(priv->user.cached_dc, pal->hpal, FALSE);
DIB_DirectDrawSurface_set_palette(This, pal);
}
void User_DirectDrawSurface_update_palette(IDirectDrawSurfaceImpl* This,
IDirectDrawPaletteImpl* pal,
DWORD dwStart, DWORD dwCount,
LPPALETTEENTRY palent)
{
#ifndef SYNC_UPDATE
USER_PRIV_VAR(priv, This);
#endif
DIB_DirectDrawSurface_update_palette(This, pal, dwStart, dwCount, palent);
/* FIXME: realize palette on display window */
#ifndef SYNC_UPDATE
/* with async updates, it's probably cool to force an update */
SetEvent(priv->user.update_event);
#endif
}
HRESULT User_DirectDrawSurface_duplicate_surface(IDirectDrawSurfaceImpl* This,
LPDIRECTDRAWSURFACE7* ppDup)
{
return User_DirectDrawSurface_Create(This->ddraw_owner,
&This->surface_desc, ppDup, NULL);
}
BOOL User_DirectDrawSurface_flip_data(IDirectDrawSurfaceImpl* front,
IDirectDrawSurfaceImpl* back,
DWORD dwFlags)
{
USER_PRIV_VAR(front_priv, front);
USER_PRIV_VAR(back_priv, back);
{
HDC tmp;
tmp = front_priv->user.cached_dc;
front_priv->user.cached_dc = back_priv->user.cached_dc;
back_priv->user.cached_dc = tmp;
}
return DIB_DirectDrawSurface_flip_data(front, back, dwFlags);
}
void User_DirectDrawSurface_flip_update(IDirectDrawSurfaceImpl* This, DWORD dwFlags)
{
#ifdef SYNC_UPDATE
This->lastlockrect.left = This->lastlockrect.right = 0;
assert(This->surface_desc.ddsCaps.dwCaps & DDSCAPS_PRIMARYSURFACE);
User_copy_to_screen(This,NULL);
#else
USER_PRIV_VAR(priv, This);
assert(This->surface_desc.ddsCaps.dwCaps & DDSCAPS_PRIMARYSURFACE);
if (dwFlags & DDFLIP_WAIT) User_DirectDrawSurface_wait_update(This);
This->lastlockrect.left = This->lastlockrect.right = 0;
SetEvent(priv->user.update_event);
#endif
}
HRESULT User_DirectDrawSurface_get_dc(IDirectDrawSurfaceImpl* This, HDC* phDC)
{
USER_PRIV_VAR(priv, This);
*phDC = priv->user.cached_dc;
return S_OK;
}
HRESULT User_DirectDrawSurface_release_dc(IDirectDrawSurfaceImpl* This,
HDC hDC)
{
return S_OK;
}
HRESULT User_DirectDrawSurface_get_gamma_ramp(IDirectDrawSurfaceImpl* This,
DWORD dwFlags,
LPDDGAMMARAMP lpGammaRamp)
{
if (This->surface_desc.ddsCaps.dwCaps & DDSCAPS_PRIMARYSURFACE)
{
POINT offset;
HWND hDisplayWnd;
HDC hDisplayDC;
HRESULT hr;
hDisplayWnd = get_display_window(This, &offset);
hDisplayDC = GetDCEx(hDisplayWnd, 0, DCX_CLIPSIBLINGS|DCX_CACHE);
hr = GetDeviceGammaRamp(hDisplayDC, lpGammaRamp) ? DD_OK : DDERR_UNSUPPORTED;
ReleaseDC(hDisplayWnd, hDisplayDC);
return hr;
}
return Main_DirectDrawSurface_get_gamma_ramp(This, dwFlags, lpGammaRamp);
}
HRESULT User_DirectDrawSurface_set_gamma_ramp(IDirectDrawSurfaceImpl* This,
DWORD dwFlags,
LPDDGAMMARAMP lpGammaRamp)
{
if (This->surface_desc.ddsCaps.dwCaps & DDSCAPS_PRIMARYSURFACE)
{
POINT offset;
HWND hDisplayWnd;
HDC hDisplayDC;
HRESULT hr;
hDisplayWnd = get_display_window(This, &offset);
hDisplayDC = GetDCEx(hDisplayWnd, 0, DCX_CLIPSIBLINGS|DCX_CACHE);
hr = SetDeviceGammaRamp(hDisplayDC, lpGammaRamp) ? DD_OK : DDERR_UNSUPPORTED;
ReleaseDC(hDisplayWnd, hDisplayDC);
return hr;
}
return Main_DirectDrawSurface_set_gamma_ramp(This, dwFlags, lpGammaRamp);
}
/* Returns the window that hosts the display.
* *pt is set to the upper left position of the window relative to the
* upper left corner of the surface. */
static HWND get_display_window(IDirectDrawSurfaceImpl* This, LPPOINT pt)
{
memset(pt, 0, sizeof(*pt));
if (This->ddraw_owner->cooperative_level & DDSCL_FULLSCREEN)
{
#ifdef OWN_WINDOW
USER_PRIV_VAR(priv, This);
#if 1
SetWindowPos(priv->user.window, HWND_TOP, 0, 0, 0, 0,
SWP_DEFERERASE|SWP_NOACTIVATE|SWP_NOCOPYBITS|SWP_NOMOVE|
SWP_NOREDRAW|SWP_NOSENDCHANGING|SWP_NOSIZE);
#endif
return priv->user.window;
#else
return This->ddraw_owner->window;
#endif
}
else
{
if (This->clipper != NULL)
{
/* looks silly, but since we don't have the clipper locked */
HWND hWnd = This->clipper->hWnd;
if (hWnd != 0)
{
ClientToScreen(hWnd, pt);
return hWnd;
}
else
{
static BOOL warn = 0;
if (!warn++) FIXME("clipper clip lists not supported\n");
return GetDesktopWindow();
}
}
else
{
static BOOL warn = 0;
if (!warn++) WARN("hosting on root\n");
return GetDesktopWindow();
}
}
}
HWND User_DirectDrawSurface_get_display_window(IDirectDrawSurfaceImpl* This)
{
POINT offset;
return get_display_window(This, &offset);
}
#ifdef OWN_WINDOW
static void User_create_own_window(IDirectDrawSurfaceImpl* This)
{
USER_PRIV_VAR(priv, This);
if (This->ddraw_owner->cooperative_level & DDSCL_FULLSCREEN)
{
priv->user.window = CreateWindowExA(WS_EX_TOPMOST |
WS_EX_LAYERED |
WS_EX_TRANSPARENT,
"WINE_DDRAW", "DirectDraw",
WS_POPUP,
0, 0,
This->surface_desc.dwWidth,
This->surface_desc.dwHeight,
GetDesktopWindow(),
0, 0, This);
This->more.lpDDRAWReserved = (LPVOID)priv->user.window;
SetWindowPos(priv->user.window, HWND_TOP, 0, 0, 0, 0,
SWP_DEFERERASE|SWP_NOACTIVATE|SWP_NOCOPYBITS|SWP_NOMOVE|
SWP_NOREDRAW|SWP_NOSENDCHANGING|SWP_NOSIZE|SWP_SHOWWINDOW);
UpdateWindow(priv->user.window);
}
}
static void User_destroy_own_window(IDirectDrawSurfaceImpl* This)
{
USER_PRIV_VAR(priv, This);
if (priv->user.window)
{
SetWindowPos(priv->user.window, 0, 0, 0, 0, 0,
SWP_DEFERERASE|SWP_NOACTIVATE|SWP_NOCOPYBITS|SWP_NOMOVE|SWP_NOZORDER|
SWP_NOREDRAW|SWP_NOSENDCHANGING|SWP_NOSIZE|SWP_HIDEWINDOW);
This->more.lpDDRAWReserved = NULL;
DestroyWindow(priv->user.window);
priv->user.window = 0;
}
}
#endif
#ifndef SYNC_UPDATE
static DWORD CALLBACK User_update_thread(LPVOID arg)
{
IDirectDrawSurfaceImpl *This = (IDirectDrawSurfaceImpl *)arg;
USER_PRIV_VAR(priv, This);
volatile HANDLE *pActive = (volatile HANDLE *)&priv->user.update_event;
HANDLE event = *pActive;
#ifdef OWN_WINDOW
User_create_own_window(This);
#endif
/* the point of this is that many games lock the primary surface
* multiple times per frame; this thread will then simply copy as
* often as it can without keeping the main thread waiting for
* each unlock, thus keeping the frame rate high */
do {
#ifdef OWN_WINDOW
DWORD ret = MsgWaitForMultipleObjects(1, &event, FALSE, INFINITE, QS_ALLINPUT);
MSG msg;
while (PeekMessageA(&msg, 0, 0, 0, PM_REMOVE))
{
switch (msg.message) {
case WM_PAINT:
DispatchMessageA(&msg);
break;
default:
/* since we risk getting keyboard messages posted to us,
* repost posted messages to cooperative window */
PostMessageA(This->ddraw_owner->window, msg.message, msg.wParam, msg.lParam);
}
}
#else
DWORD ret = WaitForSingleObject(event, INFINITE);
#endif
if (ret == WAIT_OBJECT_0)
{
if (*pActive) {
priv->user.in_refresh = TRUE;
User_copy_to_screen(This, NULL);
EnterCriticalSection(&priv->user.crit);
priv->user.in_refresh = FALSE;
if (priv->user.wait_count)
SetEvent(priv->user.refresh_event);
LeaveCriticalSection(&priv->user.crit);
} else
break;
}
else if (ret != WAIT_OBJECT_0+1) break;
} while (TRUE);
SetEvent(priv->user.refresh_event);
#ifdef OWN_WINDOW
User_destroy_own_window(This);
#endif
return 0;
}
#endif
static void User_copy_to_screen(IDirectDrawSurfaceImpl* This, LPCRECT rc)
{
if (This->surface_desc.ddsCaps.dwCaps & DDSCAPS_PRIMARYSURFACE)
{
POINT offset;
HWND hDisplayWnd;
HDC hDisplayDC;
HDC hSurfaceDC;
RECT drawrect;
if (FAILED(This->get_dc(This, &hSurfaceDC)))
return;
hDisplayWnd = get_display_window(This, &offset);
hDisplayDC = GetDCEx(hDisplayWnd, 0, DCX_CLIPSIBLINGS|DCX_CACHE);
#if 0
/* FIXME: this doesn't work... if users really want to run
* X in 8bpp, then we need to call directly into display.drv
* (or Wine's equivalent), and force a private colormap
* without default entries. */
if (This->palette) {
SelectPalette(hDisplayDC, This->palette->hpal, FALSE);
RealizePalette(hDisplayDC); /* sends messages => deadlocks */
}
#endif
drawrect.left = 0;
drawrect.right = This->surface_desc.dwWidth;
drawrect.top = 0;
drawrect.bottom = This->surface_desc.dwHeight;
if (This->clipper) {
RECT xrc;
HWND hwnd = This->clipper->hWnd;
if (hwnd && GetClientRect(hwnd,&xrc)) {
OffsetRect(&xrc,offset.x,offset.y);
IntersectRect(&drawrect,&drawrect,&xrc);
}
}
if (rc)
IntersectRect(&drawrect,&drawrect,rc);
else {
/* Only use this if the caller did not pass a rectangle, since
* due to double locking this could be the wrong one ... */
if (This->lastlockrect.left != This->lastlockrect.right)
IntersectRect(&drawrect,&drawrect,&This->lastlockrect);
}
BitBlt(hDisplayDC,
drawrect.left-offset.x, drawrect.top-offset.y,
drawrect.right-drawrect.left, drawrect.bottom-drawrect.top,
hSurfaceDC,
drawrect.left, drawrect.top,
SRCCOPY
);
ReleaseDC(hDisplayWnd, hDisplayDC);
}
}
#if 0
static void User_copy_from_screen(IDirectDrawSurfaceImpl* This, LPCRECT rc)
{
if (This->surface_desc.ddsCaps.dwCaps & DDSCAPS_PRIMARYSURFACE)
{
POINT offset;
HWND hDisplayWnd = get_display_window(This, &offset);
HDC hDisplayDC = GetDC(hDisplayWnd);
RECT drawrect;
drawrect.left = 0;
drawrect.right = This->surface_desc.dwWidth;
drawrect.top = 0;
drawrect.bottom = This->surface_desc.dwHeight;
if (rc)
IntersectRect(&drawrect,&drawrect,rc);
BitBlt(This->hDC,
drawrect.left, drawrect.top,
drawrect.right-drawrect.left, drawrect.bottom-drawrect.top,
hDisplayDC,
drawrect.left+offset.x, drawrect.top+offset.y,
SRCCOPY
);
ReleaseDC(hDisplayWnd, hDisplayDC);
}
}
#endif
static const IDirectDrawSurface7Vtbl User_IDirectDrawSurface7_VTable =
{
Main_DirectDrawSurface_QueryInterface,
Main_DirectDrawSurface_AddRef,
Main_DirectDrawSurface_Release,
Main_DirectDrawSurface_AddAttachedSurface,
Main_DirectDrawSurface_AddOverlayDirtyRect,
DIB_DirectDrawSurface_Blt,
Main_DirectDrawSurface_BltBatch,
DIB_DirectDrawSurface_BltFast,
Main_DirectDrawSurface_DeleteAttachedSurface,
Main_DirectDrawSurface_EnumAttachedSurfaces,
Main_DirectDrawSurface_EnumOverlayZOrders,
Main_DirectDrawSurface_Flip,
Main_DirectDrawSurface_GetAttachedSurface,
Main_DirectDrawSurface_GetBltStatus,
Main_DirectDrawSurface_GetCaps,
Main_DirectDrawSurface_GetClipper,
Main_DirectDrawSurface_GetColorKey,
Main_DirectDrawSurface_GetDC,
Main_DirectDrawSurface_GetFlipStatus,
Main_DirectDrawSurface_GetOverlayPosition,
Main_DirectDrawSurface_GetPalette,
Main_DirectDrawSurface_GetPixelFormat,
Main_DirectDrawSurface_GetSurfaceDesc,
Main_DirectDrawSurface_Initialize,
Main_DirectDrawSurface_IsLost,
Main_DirectDrawSurface_Lock,
Main_DirectDrawSurface_ReleaseDC,
DIB_DirectDrawSurface_Restore,
Main_DirectDrawSurface_SetClipper,
Main_DirectDrawSurface_SetColorKey,
Main_DirectDrawSurface_SetOverlayPosition,
Main_DirectDrawSurface_SetPalette,
Main_DirectDrawSurface_Unlock,
Main_DirectDrawSurface_UpdateOverlay,
Main_DirectDrawSurface_UpdateOverlayDisplay,
Main_DirectDrawSurface_UpdateOverlayZOrder,
Main_DirectDrawSurface_GetDDInterface,
Main_DirectDrawSurface_PageLock,
Main_DirectDrawSurface_PageUnlock,
DIB_DirectDrawSurface_SetSurfaceDesc,
Main_DirectDrawSurface_SetPrivateData,
Main_DirectDrawSurface_GetPrivateData,
Main_DirectDrawSurface_FreePrivateData,
Main_DirectDrawSurface_GetUniquenessValue,
Main_DirectDrawSurface_ChangeUniquenessValue,
Main_DirectDrawSurface_SetPriority,
Main_DirectDrawSurface_GetPriority,
Main_DirectDrawSurface_SetLOD,
Main_DirectDrawSurface_GetLOD
};