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xserver/hw/xwin/winpfbdd.c

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/*
*Copyright (C) 1994-2000 The XFree86 Project, Inc. All Rights Reserved.
*
*Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
*"Software"), to deal in the Software without restriction, including
*without limitation the rights to use, copy, modify, merge, publish,
*distribute, sublicense, and/or sell copies of the Software, and to
*permit persons to whom the Software is furnished to do so, subject to
*the following conditions:
*
*The above copyright notice and this permission notice shall be
*included in all copies or substantial portions of the Software.
*
*THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
*EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
*MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
*NONINFRINGEMENT. IN NO EVENT SHALL THE XFREE86 PROJECT BE LIABLE FOR
*ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
*CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
*WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
*Except as contained in this notice, the name of the XFree86 Project
*shall not be used in advertising or otherwise to promote the sale, use
*or other dealings in this Software without prior written authorization
*from the XFree86 Project.
*
* Authors: Dakshinamurthy Karra
* Suhaib M Siddiqi
* Peter Busch
* Harold L Hunt II
*/
#ifdef HAVE_XWIN_CONFIG_H
#include <xwin-config.h>
#endif
#include "win.h"
/*
* Local function prototypes
*/
static Bool
winAllocateFBPrimaryDD (ScreenPtr pScreen);
static Bool
winCloseScreenPrimaryDD (int nIndex, ScreenPtr pScreen);
static Bool
winInitVisualsPrimaryDD (ScreenPtr pScreen);
static Bool
winAdjustVideoModePrimaryDD (ScreenPtr pScreen);
static Bool
winActivateAppPrimaryDD (ScreenPtr pScreen);
static Bool
winHotKeyAltTabPrimaryDD (ScreenPtr pScreen);
/*
* Create a DirectDraw primary surface
*/
static Bool
winAllocateFBPrimaryDD (ScreenPtr pScreen)
{
winScreenPriv(pScreen);
winScreenInfo *pScreenInfo = pScreenPriv->pScreenInfo;
HRESULT ddrval = DD_OK;
DDSURFACEDESC ddsd;
DDSURFACEDESC *pddsdPrimary = NULL;
DDSURFACEDESC *pddsdOffscreen = NULL;
RECT rcClient;
ErrorF ("winAllocateFBPrimaryDD\n");
/* Get client area location in screen coords */
GetClientRect (pScreenPriv->hwndScreen, &rcClient);
MapWindowPoints (pScreenPriv->hwndScreen,
HWND_DESKTOP,
(LPPOINT)&rcClient, 2);
/* Create a DirectDraw object, store the address at lpdd */
ddrval = (*g_fpDirectDrawCreate) (NULL, &pScreenPriv->pdd, NULL);
if (ddrval != DD_OK)
FatalError ("winAllocateFBPrimaryDD - Could not start DirectDraw\n");
/* Get a DirectDraw2 interface pointer */
ddrval = IDirectDraw_QueryInterface (pScreenPriv->pdd,
&IID_IDirectDraw2,
(LPVOID*) &pScreenPriv->pdd2);
if (FAILED (ddrval))
{
ErrorF ("winAllocateFBShadowDD - Failed DD2 query: %08x\n",
(unsigned int) ddrval);
return FALSE;
}
ErrorF ("winAllocateFBPrimaryDD - Created and initialized DD\n");
/* Are we windowed or fullscreen? */
if (pScreenInfo->fFullScreen)
{
/* Full screen mode */
ddrval = IDirectDraw2_SetCooperativeLevel (pScreenPriv->pdd2,
pScreenPriv->hwndScreen,
DDSCL_FULLSCREEN
| DDSCL_EXCLUSIVE);
if (FAILED (ddrval))
FatalError ("winAllocateFBPrimaryDD - Could not set "
"cooperative level\n");
/* Change the video mode to the mode requested */
ddrval = IDirectDraw2_SetDisplayMode (pScreenPriv->pdd2,
pScreenInfo->dwWidth,
pScreenInfo->dwHeight,
pScreenInfo->dwBPP,
pScreenInfo->dwRefreshRate,
0);
if (FAILED (ddrval))
FatalError ("winAllocateFBPrimaryDD - Could not set "
"full screen display mode\n");
}
else
{
/* Windowed mode */
ddrval = IDirectDraw2_SetCooperativeLevel (pScreenPriv->pdd2,
pScreenPriv->hwndScreen,
DDSCL_NORMAL);
if (FAILED (ddrval))
FatalError ("winAllocateFBPrimaryDD - Could not set "
"cooperative level\n");
}
/* Describe the primary surface */
ZeroMemory (&ddsd, sizeof (ddsd));
ddsd.dwSize = sizeof (ddsd);
ddsd.dwFlags = DDSD_CAPS;
ddsd.ddsCaps.dwCaps = DDSCAPS_PRIMARYSURFACE;
/* Create the primary surface */
ddrval = IDirectDraw2_CreateSurface (pScreenPriv->pdd2,
&ddsd,
&pScreenPriv->pddsPrimary,
NULL);
if (FAILED (ddrval))
FatalError ("winAllocateFBPrimaryDD - Could not create primary "
"surface %08x\n", (unsigned int) ddrval);
ErrorF ("winAllocateFBPrimaryDD - Created primary\n");
/* Allocate a DD surface description for our screen privates */
pddsdPrimary = pScreenPriv->pddsdPrimary
= malloc (sizeof (DDSURFACEDESC));
if (pddsdPrimary == NULL)
FatalError ("winAllocateFBPrimaryDD - Could not allocate surface "
"description memory\n");
ZeroMemory (pddsdPrimary, sizeof (*pddsdPrimary));
pddsdPrimary->dwSize = sizeof (*pddsdPrimary);
/* Describe the offscreen surface to be created */
/*
* NOTE: Do not use a DDSCAPS_VIDEOMEMORY surface,
* as drawing, locking, and unlocking take forever
* with video memory surfaces. In addition,
* video memory is a somewhat scarce resource,
* so you shouldn't be allocating video memory when
* you have the option of using system memory instead.
*/
ZeroMemory (&ddsd, sizeof (ddsd));
ddsd.dwSize = sizeof (ddsd);
ddsd.dwFlags = DDSD_CAPS | DDSD_HEIGHT | DDSD_WIDTH;
ddsd.ddsCaps.dwCaps = DDSCAPS_OFFSCREENPLAIN | DDSCAPS_SYSTEMMEMORY;
ddsd.dwHeight = pScreenInfo->dwHeight;
ddsd.dwWidth = pScreenInfo->dwWidth;
/* Create the shadow surface */
ddrval = IDirectDraw2_CreateSurface (pScreenPriv->pdd2,
&ddsd,
&pScreenPriv->pddsOffscreen,
NULL);
if (ddrval != DD_OK)
FatalError ("winAllocateFBPrimaryDD - Could not create shadow "
"surface\n");
ErrorF ("winAllocateFBPrimaryDD - Created offscreen\n");
/* Allocate a DD surface description for our screen privates */
pddsdOffscreen = pScreenPriv->pddsdOffscreen
= malloc (sizeof (DDSURFACEDESC));
if (pddsdOffscreen == NULL)
FatalError ("winAllocateFBPrimaryDD - Could not allocate surface "
"description memory\n");
ZeroMemory (pddsdOffscreen, sizeof (*pddsdOffscreen));
pddsdOffscreen->dwSize = sizeof (*pddsdOffscreen);
ErrorF ("winAllocateFBPrimaryDD - Locking primary\n");
/* Lock the primary surface */
ddrval = IDirectDrawSurface2_Lock (pScreenPriv->pddsPrimary,
pScreenInfo->fFullScreen ? NULL:&rcClient,
pddsdPrimary,
DDLOCK_WAIT,
NULL);
if (ddrval != DD_OK || pddsdPrimary->lpSurface == NULL)
FatalError ("winAllocateFBPrimaryDD - Could not lock "
"primary surface\n");
ErrorF ("winAllocateFBPrimaryDD - Locked primary\n");
/* We don't know how to deal with anything other than RGB */
if (!(pddsdPrimary->ddpfPixelFormat.dwFlags & DDPF_RGB))
FatalError ("winAllocateFBPrimaryDD - Color format other than RGB\n");
/* Grab the pitch from the surface desc */
pScreenInfo->dwStride = (pddsdPrimary->u1.lPitch * 8)
/ pScreenInfo->dwBPP;
/* Save the pointer to our surface memory */
pScreenInfo->pfb = pddsdPrimary->lpSurface;
/* Grab the color depth and masks from the surface description */
pScreenPriv->dwRedMask = pddsdPrimary->ddpfPixelFormat.u2.dwRBitMask;
pScreenPriv->dwGreenMask = pddsdPrimary->ddpfPixelFormat.u3.dwGBitMask;
pScreenPriv->dwBlueMask = pddsdPrimary->ddpfPixelFormat.u4.dwBBitMask;
ErrorF ("winAllocateFBPrimaryDD - Returning\n");
return TRUE;
}
static void
winFreeFBPrimaryDD (ScreenPtr pScreen)
{
winScreenPriv(pScreen);
winScreenInfo *pScreenInfo = pScreenPriv->pScreenInfo;
/* Free the offscreen surface, if there is one */
if (pScreenPriv->pddsOffscreen)
{
IDirectDrawSurface2_Unlock (pScreenPriv->pddsOffscreen, NULL);
IDirectDrawSurface2_Release (pScreenPriv->pddsOffscreen);
pScreenPriv->pddsOffscreen = NULL;
}
/* Release the primary surface, if there is one */
if (pScreenPriv->pddsPrimary)
{
IDirectDrawSurface2_Unlock (pScreenPriv->pddsPrimary, NULL);
IDirectDrawSurface2_Release (pScreenPriv->pddsPrimary);
pScreenPriv->pddsPrimary = NULL;
}
/* Free the DirectDraw object, if there is one */
if (pScreenPriv->pdd)
{
IDirectDraw2_RestoreDisplayMode (pScreenPriv->pdd);
IDirectDraw2_Release (pScreenPriv->pdd);
pScreenPriv->pdd = NULL;
}
/* Invalidate the ScreenInfo's fb pointer */
pScreenInfo->pfb = NULL;
}
static Bool
winInitScreenPrimaryDD(ScreenPtr pScreen)
{
return winAllocateFBPrimaryDD(pScreen);
}
/*
* Call the wrapped CloseScreen function.
*
* Free our resources and private structures.
*/
static Bool
winCloseScreenPrimaryDD (int nIndex, ScreenPtr pScreen)
{
winScreenPriv(pScreen);
winScreenInfo *pScreenInfo = pScreenPriv->pScreenInfo;
Bool fReturn;
ErrorF ("winCloseScreenPrimaryDD - Freeing screen resources\n");
/* Flag that the screen is closed */
pScreenPriv->fClosed = TRUE;
pScreenPriv->fActive = FALSE;
/* Call the wrapped CloseScreen procedure */
WIN_UNWRAP(CloseScreen);
fReturn = (*pScreen->CloseScreen) (nIndex, pScreen);
/* Delete the window property */
RemoveProp (pScreenPriv->hwndScreen, WIN_SCR_PROP);
winFreeFBPrimaryDD(pScreen);
/* Delete tray icon, if we have one */
if (!pScreenInfo->fNoTrayIcon)
winDeleteNotifyIcon (pScreenPriv);
/* Free the exit confirmation dialog box, if it exists */
if (g_hDlgExit != NULL)
{
DestroyWindow (g_hDlgExit);
g_hDlgExit = NULL;
}
/* Kill our window */
if (pScreenPriv->hwndScreen)
{
DestroyWindow (pScreenPriv->hwndScreen);
pScreenPriv->hwndScreen = NULL;
}
/* Kill our screeninfo's pointer to the screen */
pScreenInfo->pScreen = NULL;
/* Free the screen privates for this screen */
free ((pointer) pScreenPriv);
return fReturn;
}
/*
* Tell mi what sort of visuals we need.
*
* Generally we only need one visual, as our screen can only
* handle one format at a time, I believe. You may want
* to verify that last sentence.
*/
static Bool
winInitVisualsPrimaryDD (ScreenPtr pScreen)
{
winScreenPriv(pScreen);
winScreenInfo *pScreenInfo = pScreenPriv->pScreenInfo;
DWORD dwRedBits, dwGreenBits, dwBlueBits;
/* Count the number of ones in each color mask */
dwRedBits = winCountBits (pScreenPriv->dwRedMask);
dwGreenBits = winCountBits (pScreenPriv->dwGreenMask);
dwBlueBits = winCountBits (pScreenPriv->dwBlueMask);
/* Store the maximum number of ones in a color mask as the bitsPerRGB */
if (dwRedBits > dwGreenBits && dwRedBits > dwBlueBits)
pScreenPriv->dwBitsPerRGB = dwRedBits;
else if (dwGreenBits > dwRedBits && dwGreenBits > dwBlueBits)
pScreenPriv->dwBitsPerRGB = dwGreenBits;
else
pScreenPriv->dwBitsPerRGB = dwBlueBits;
ErrorF ("winInitVisualsPrimaryDD - Masks: %08x %08x %08x bpRGB: %d\n",
(unsigned int) pScreenPriv->dwRedMask,
(unsigned int) pScreenPriv->dwGreenMask,
(unsigned int) pScreenPriv->dwBlueMask,
(int) pScreenPriv->dwBitsPerRGB);
/* Create a single visual according to the Windows screen depth */
switch (pScreenInfo->dwDepth)
{
case 24:
case 16:
case 15:
if (!miSetVisualTypesAndMasks (pScreenInfo->dwDepth,
TrueColorMask,
pScreenPriv->dwBitsPerRGB,
TrueColor,
pScreenPriv->dwRedMask,
pScreenPriv->dwGreenMask,
pScreenPriv->dwBlueMask))
{
ErrorF ("winInitVisualsPrimaryDD - "
"miSetVisualTypesAndMasks failed\n");
return FALSE;
}
break;
case 8:
#if CYGDEBUG
winDebug ("winInitVisuals - Calling miSetVisualTypesAndMasks\n");
#endif /* CYGDEBUG */
if (!miSetVisualTypesAndMasks (pScreenInfo->dwDepth,
PseudoColorMask,
pScreenPriv->dwBitsPerRGB,
PseudoColor,
pScreenPriv->dwRedMask,
pScreenPriv->dwGreenMask,
pScreenPriv->dwBlueMask))
{
ErrorF ("winInitVisualsPrimaryDD - "
"miSetVisualTypesAndMasks failed\n");
return FALSE;
}
#if CYGDEBUG
winDebug ("winInitVisualsPrimaryDD - Returned from "
"miSetVisualTypesAndMasks\n");
#endif /* CYGDEBUG */
break;
default:
ErrorF ("winInitVisualsPrimaryDD - Unknown screen depth\n");
return FALSE;
}
ErrorF ("winInitVisualsPrimaryDD - Returning\n");
return TRUE;
}
static Bool
winAdjustVideoModePrimaryDD (ScreenPtr pScreen)
{
winScreenPriv(pScreen);
winScreenInfo *pScreenInfo = pScreenPriv->pScreenInfo;
HDC hdc = NULL;
DWORD dwBPP;
/* We're in serious trouble if we can't get a DC */
hdc = GetDC (NULL);
if (hdc == NULL)
{
ErrorF ("winAdjustVideoModePrimaryDD - GetDC failed\n");
return FALSE;
}
/* Query GDI for current display depth */
dwBPP = GetDeviceCaps (hdc, BITSPIXEL);
/* DirectDraw can only change the depth in fullscreen mode */
if (!(pScreenInfo->fFullScreen &&
(pScreenInfo->dwBPP != WIN_DEFAULT_BPP)))
{
/* Otherwise, We'll use GDI's depth */
pScreenInfo->dwBPP = dwBPP;
}
/* Release our DC */
ReleaseDC (NULL, hdc);
return TRUE;
}
/*
* We need to blit our offscreen fb to
* the screen when we are activated, and we need to point
* the fb code back to the primary surface memory.
*/
static Bool
winActivateAppPrimaryDD (ScreenPtr pScreen)
{
winScreenPriv(pScreen);
winScreenInfo *pScreenInfo = pScreenPriv->pScreenInfo;
RECT rcSrc, rcClient;
HRESULT ddrval = DD_OK;
/* Check for errors */
if (pScreenPriv == NULL
|| pScreenPriv->pddsPrimary == NULL
|| pScreenPriv->pddsOffscreen == NULL)
return FALSE;
/* Check for do-nothing */
if (!pScreenPriv->fActive)
return TRUE;
/* We are activating */
ddrval = IDirectDrawSurface2_IsLost (pScreenPriv->pddsOffscreen);
if (ddrval == DD_OK)
{
IDirectDrawSurface2_Unlock (pScreenPriv->pddsOffscreen,
NULL);
/*
* We don't check for an error from Unlock, because it
* doesn't matter if the Unlock failed.
*/
}
/* Restore both surfaces, just cause I like it that way */
IDirectDrawSurface2_Restore (pScreenPriv->pddsOffscreen);
IDirectDrawSurface2_Restore (pScreenPriv->pddsPrimary);
/* Get client area in screen coords */
GetClientRect (pScreenPriv->hwndScreen, &rcClient);
MapWindowPoints (pScreenPriv->hwndScreen,
HWND_DESKTOP,
(LPPOINT)&rcClient, 2);
/* Setup a source rectangle */
rcSrc.left = 0;
rcSrc.top = 0;
rcSrc.right = pScreenInfo->dwWidth;
rcSrc.bottom = pScreenInfo->dwHeight;
ddrval = IDirectDrawSurface2_Blt (pScreenPriv->pddsPrimary,
&rcClient,
pScreenPriv->pddsOffscreen,
&rcSrc,
DDBLT_WAIT,
NULL);
if (ddrval != DD_OK)
FatalError ("winActivateAppPrimaryDD () - Failed blitting offscreen "
"surface to primary surface %08x\n", (unsigned int) ddrval);
/* Lock the primary surface */
ddrval = IDirectDrawSurface2_Lock (pScreenPriv->pddsPrimary,
&rcClient,
pScreenPriv->pddsdPrimary,
DDLOCK_WAIT,
NULL);
if (ddrval != DD_OK
|| pScreenPriv->pddsdPrimary->lpSurface == NULL)
FatalError ("winActivateAppPrimaryDD () - Could not lock "
"primary surface\n");
/* Notify FB of the new memory pointer */
winUpdateFBPointer (pScreen,
pScreenPriv->pddsdPrimary->lpSurface);
/*
* Register the Alt-Tab combo as a hotkey so we can copy
* the primary framebuffer before the display mode changes
*/
RegisterHotKey (pScreenPriv->hwndScreen, 1, MOD_ALT, 9);
return TRUE;
}
/*
* Handle the Alt+Tab hotkey.
*
* We need to save the primary fb to an offscreen fb when
* we get deactivated, and point the fb code at the offscreen
* fb for the duration of the deactivation.
*/
static Bool
winHotKeyAltTabPrimaryDD (ScreenPtr pScreen)
{
winScreenPriv(pScreen);
winScreenInfo *pScreenInfo = pScreenPriv->pScreenInfo;
RECT rcClient, rcSrc;
HRESULT ddrval = DD_OK;
ErrorF ("\nwinHotKeyAltTabPrimaryDD\n\n");
/* Alt+Tab was pressed, we will lose focus very soon */
pScreenPriv->fActive = FALSE;
/* Check for error conditions */
if (pScreenPriv->pddsPrimary == NULL
|| pScreenPriv->pddsOffscreen == NULL)
return FALSE;
/* Get client area in screen coords */
GetClientRect (pScreenPriv->hwndScreen, &rcClient);
MapWindowPoints (pScreenPriv->hwndScreen,
HWND_DESKTOP,
(LPPOINT)&rcClient, 2);
/* Did we loose the primary surface? */
ddrval = IDirectDrawSurface2_IsLost (pScreenPriv->pddsPrimary);
if (ddrval == DD_OK)
{
ddrval = IDirectDrawSurface2_Unlock (pScreenPriv->pddsPrimary,
NULL);
if (FAILED (ddrval))
FatalError ("winHotKeyAltTabPrimaryDD - Failed unlocking primary "
"surface\n");
}
/* Setup a source rectangle */
rcSrc.left = 0;
rcSrc.top = 0;
rcSrc.right = pScreenInfo->dwWidth;
rcSrc.bottom = pScreenInfo->dwHeight;
/* Blit the primary surface to the offscreen surface */
ddrval = IDirectDrawSurface2_Blt (pScreenPriv->pddsOffscreen,
NULL, /* should be rcDest */
pScreenPriv->pddsPrimary,
NULL,
DDBLT_WAIT,
NULL);
if (ddrval == DDERR_SURFACELOST)
{
IDirectDrawSurface2_Restore (pScreenPriv->pddsOffscreen);
IDirectDrawSurface2_Restore (pScreenPriv->pddsPrimary);
/* Blit the primary surface to the offscreen surface */
ddrval = IDirectDrawSurface2_Blt (pScreenPriv->pddsOffscreen,
NULL,
pScreenPriv->pddsPrimary,
NULL,
DDBLT_WAIT,
NULL);
if (FAILED (ddrval))
FatalError ("winHotKeyAltTabPrimaryDD - Failed blitting primary "
"surface to offscreen surface: %08x\n",
(unsigned int) ddrval);
}
else
{
FatalError ("winHotKeyAltTabPrimaryDD - Unknown error from "
"Blt: %08dx\n", (unsigned int) ddrval);
}
/* Lock the offscreen surface */
ddrval = IDirectDrawSurface2_Lock (pScreenPriv->pddsOffscreen,
NULL,
pScreenPriv->pddsdOffscreen,
DDLOCK_WAIT,
NULL);
if (ddrval != DD_OK
|| pScreenPriv->pddsdPrimary->lpSurface == NULL)
FatalError ("winHotKeyAltTabPrimaryDD - Could not lock "
"offscreen surface\n");
/* Notify FB of the new memory pointer */
winUpdateFBPointer (pScreen,
pScreenPriv->pddsdOffscreen->lpSurface);
/* Unregister our hotkey */
UnregisterHotKey (pScreenPriv->hwndScreen, 1);
return TRUE;
}
/* Set engine specific functions */
Bool
winSetEngineFunctionsPrimaryDD (ScreenPtr pScreen)
{
winScreenPriv(pScreen);
winScreenInfo *pScreenInfo = pScreenPriv->pScreenInfo;
/* Set our pointers */
pScreenPriv->pwinAllocateFB = winAllocateFBPrimaryDD;
pScreenPriv->pwinFreeFB = winFreeFBPrimaryDD;
pScreenPriv->pwinShadowUpdate = (winShadowUpdateProcPtr) (void (*)(void))NoopDDA;
pScreenPriv->pwinInitScreen = winInitScreenPrimaryDD;
pScreenPriv->pwinCloseScreen = winCloseScreenPrimaryDD;
pScreenPriv->pwinInitVisuals = winInitVisualsPrimaryDD;
pScreenPriv->pwinAdjustVideoMode = winAdjustVideoModePrimaryDD;
if (pScreenInfo->fFullScreen)
pScreenPriv->pwinCreateBoundingWindow = winCreateBoundingWindowFullScreen;
else
pScreenPriv->pwinCreateBoundingWindow = winCreateBoundingWindowWindowed;
pScreenPriv->pwinFinishScreenInit = winFinishScreenInitFB;
pScreenPriv->pwinBltExposedRegions = (winBltExposedRegionsProcPtr) (void (*)(void))NoopDDA;
pScreenPriv->pwinActivateApp = winActivateAppPrimaryDD;
pScreenPriv->pwinRedrawScreen = NULL;
pScreenPriv->pwinRealizeInstalledPalette = NULL;
pScreenPriv->pwinInstallColormap = NULL;
pScreenPriv->pwinStoreColors = NULL;
pScreenPriv->pwinCreateColormap = NULL;
pScreenPriv->pwinDestroyColormap = NULL;
pScreenPriv->pwinHotKeyAltTab = winHotKeyAltTabPrimaryDD;
pScreenPriv->pwinCreatePrimarySurface = (winCreatePrimarySurfaceProcPtr) (void (*)(void))NoopDDA;
pScreenPriv->pwinReleasePrimarySurface = (winReleasePrimarySurfaceProcPtr) (void (*)(void))NoopDDA;
#ifdef XWIN_MULTIWINDOW
pScreenPriv->pwinFinishCreateWindowsWindow =
(winFinishCreateWindowsWindowProcPtr) (void (*)(void))NoopDDA;
#endif
return TRUE;
}
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