Initial revision

1 files changed, 1362 insertions, 0 deletions

diff --git a/hw/xwin/winshaddd.c b/hw/xwin/winshaddd.c
new file mode 100644
index 000000000..9c14ebf34
--- /dev/null
+++ b/hw/xwin/winshaddd.c
@@ -0,0 +1,1362 @@
+/*
+ *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
+ */
+/* $XFree86: xc/programs/Xserver/hw/xwin/winshaddd.c,v 1.23 2003/02/12 15:01:38 alanh Exp $ */
+
+#include "win.h"
+
+/*
+ * FIXME: Headers are broken, DEFINE_GUID doesn't work correctly,
+ * so we have to redefine it here.
+ */
+#ifdef DEFINE_GUID
+#undef DEFINE_GUID
+#define DEFINE_GUID(n,l,w1,w2,b1,b2,b3,b4,b5,b6,b7,b8) GUID_EXT const GUID n GUID_SECT = {l,w1,w2,{b1,b2,b3,b4,b5,b6,b7,b8}}
+#endif /* DEFINE_GUID */
+
+
+/*
+ * FIXME: Headers are broken, IID_IDirectDraw4 has to be defined
+ * here manually.  Should be handled by ddraw.h
+ */
+#ifndef IID_IDirectDraw2
+DEFINE_GUID( IID_IDirectDraw2,0xB3A6F3E0,0x2B43,0x11CF,0xA2,0xDE,0x00,0xAA,0x00,0xB9,0x33,0x56 );
+#endif /* IID_IDirectDraw2 */
+
+
+/*
+ * Create the primary surface and attach the clipper.
+ * Used for both the initial surface creation and during
+ * WM_DISPLAYCHANGE messages.
+ */
+
+Bool
+winCreatePrimarySurfaceShadowDD (ScreenPtr pScreen)
+{
+  winScreenPriv(pScreen);
+  HRESULT		ddrval = DD_OK;
+  DDSURFACEDESC		ddsd;
+
+  /* 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))
+    {
+      ErrorF ("winCreatePrimarySurfaceShadowDD - Could not create primary "
+	      "surface: %08x\n", ddrval);
+      return FALSE;
+    }
+  
+#if CYGDEBUG
+  ErrorF ("winCreatePrimarySurfaceShadowDD - Created primary surface\n");
+#endif
+
+  /*
+   * Attach a clipper to the primary surface that will clip our blits to our
+   * display window.
+   */
+  ddrval = IDirectDrawSurface2_SetClipper (pScreenPriv->pddsPrimary,
+					   pScreenPriv->pddcPrimary);
+  if (FAILED (ddrval))
+    {
+      ErrorF ("winCreatePrimarySurfaceShadowDD - Primary attach clipper "
+	      "failed: %08x\n",
+	      ddrval);
+      return FALSE;
+    }
+
+#if CYGDEBUG
+  ErrorF ("winCreatePrimarySurfaceShadowDD - Attached clipper to "
+	  "primary surface\n");
+#endif
+
+  /* Everything was correct */
+  return TRUE;
+}
+
+
+/*
+ * Detach the clipper and release the primary surface.
+ * Called from WM_DISPLAYCHANGE.
+ */
+
+Bool
+winReleasePrimarySurfaceShadowDD (ScreenPtr pScreen)
+{
+  winScreenPriv(pScreen);
+
+  ErrorF ("winReleasePrimarySurfaceShadowDD - Hello\n");
+
+  /* Release the primary surface and clipper, if they exist */
+  if (pScreenPriv->pddsPrimary)
+    {
+      /*
+       * Detach the clipper from the primary surface.
+       * NOTE: We do this explicity for clarity.  The Clipper is not released.
+       */
+      IDirectDrawSurface2_SetClipper (pScreenPriv->pddsPrimary,
+				      NULL);
+
+      ErrorF ("winReleasePrimarySurfaceShadowDD - Detached clipper\n");
+
+      /* Release the primary surface */
+      IDirectDrawSurface2_Release (pScreenPriv->pddsPrimary);
+      pScreenPriv->pddsPrimary = NULL;
+    }
+
+  ErrorF ("winReleasePrimarySurfaceShadowDD - Released primary surface\n");
+
+  return TRUE;
+}
+
+
+/*
+ * Create a DirectDraw surface for the shadow framebuffer; also create
+ * a primary surface object so we can blit to the display.
+ * 
+ * Install a DirectDraw clipper on our primary surface object
+ * that clips our blits to the unobscured client area of our display window.
+ */
+
+Bool
+winAllocateFBShadowDD (ScreenPtr pScreen)
+{
+  winScreenPriv(pScreen);
+  winScreenInfo		*pScreenInfo = pScreenPriv->pScreenInfo;  
+  HRESULT		ddrval = DD_OK;
+  DDSURFACEDESC		ddsd;
+  DDSURFACEDESC		*pddsdShadow = NULL;
+
+#if CYGDEBUG
+  ErrorF ("winAllocateFBShadowDD\n");
+#endif
+
+  /* Create a clipper */
+  ddrval = (*g_fpDirectDrawCreateClipper) (0,
+					   &pScreenPriv->pddcPrimary,
+					   NULL);
+  if (FAILED (ddrval))
+    {
+      ErrorF ("winAllocateFBShadowDD - Could not create clipper: %08x\n",
+	      ddrval);
+      return FALSE;
+    }
+
+#if CYGDEBUG
+  ErrorF ("winAllocateFBShadowDD - Created a clipper\n");
+#endif
+
+  /* Get a device context for the screen  */
+  pScreenPriv->hdcScreen = GetDC (pScreenPriv->hwndScreen);
+
+  /* Attach the clipper to our display window */
+  ddrval = IDirectDrawClipper_SetHWnd (pScreenPriv->pddcPrimary,
+				       0,
+				       pScreenPriv->hwndScreen);
+  if (FAILED (ddrval))
+    {
+      ErrorF ("winAllocateFBShadowDD - Clipper not attached to "
+	      "window: %08x\n",
+	      ddrval);
+      return FALSE;
+    }
+
+#if CYGDEBUG
+  ErrorF ("winAllocateFBShadowDD - Attached clipper to window\n");
+#endif
+
+  /* Create a DirectDraw object, store the address at lpdd */
+  ddrval = (*g_fpDirectDrawCreate) (NULL, &pScreenPriv->pdd, NULL);
+  if (FAILED (ddrval))
+    {
+      ErrorF ("winAllocateFBShadowDD - Could not start DirectDraw: %08x\n",
+	      ddrval);
+      return FALSE;
+    }
+
+#if CYGDEBUG
+  ErrorF ("winAllocateFBShadowDD () - Created and initialized DD\n");
+#endif
+
+  /* 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",
+	      ddrval);
+      return FALSE;
+    }
+
+  /* Are we full screen? */
+  if (pScreenInfo->fFullScreen)
+    {
+      DDSURFACEDESC	ddsdCurrent;
+      DWORD		dwRefreshRateCurrent = 0;
+      HDC		hdc = NULL;
+
+      /* Set the cooperative level to full screen */
+      ddrval = IDirectDraw2_SetCooperativeLevel (pScreenPriv->pdd2,
+						 pScreenPriv->hwndScreen,
+						 DDSCL_EXCLUSIVE
+						 | DDSCL_FULLSCREEN);
+      if (FAILED (ddrval))
+	{
+	  ErrorF ("winAllocateFBShadowDD - Could not set "
+		  "cooperative level: %08x\n",
+		  ddrval);
+	  return FALSE;
+	}
+
+      /*
+       * We only need to get the current refresh rate for comparison
+       * if a refresh rate has been passed on the command line.
+       */
+      if (pScreenInfo->dwRefreshRate != 0)
+	{
+	  ZeroMemory (&ddsdCurrent, sizeof (ddsdCurrent));
+	  ddsdCurrent.dwSize = sizeof (ddsdCurrent);
+	  
+	  /* Get information about current display settings */
+	  ddrval = IDirectDraw2_GetDisplayMode (pScreenPriv->pdd2,
+						&ddsdCurrent);
+	  if (FAILED (ddrval))
+	    {
+	      ErrorF ("winAllocateFBShadowDD - Could not get current "
+		      "refresh rate: %08x.  Continuing.\n",
+		      ddrval);
+	      dwRefreshRateCurrent = 0;
+	    }
+	  else
+	    {
+	      /* Grab the current refresh rate */
+	      dwRefreshRateCurrent = ddsdCurrent.u2.dwRefreshRate;
+	    }
+	}
+
+      /* Clean up the refresh rate */
+      if (dwRefreshRateCurrent == pScreenInfo->dwRefreshRate)
+	{
+	  /*
+	   * Refresh rate is non-specified or equal to current.
+	   */
+	  pScreenInfo->dwRefreshRate = 0;
+	}
+
+      /* Grab a device context for the screen */
+      hdc = GetDC (NULL);
+      if (hdc == NULL)
+	{
+	  ErrorF ("winAllocateFBShadowDD - GetDC () failed\n");
+	  return FALSE;
+	}
+
+      /* Only change the video mode when different than current mode */
+      if (!pScreenInfo->fMultipleMonitors
+	  && (pScreenInfo->dwWidth != GetSystemMetrics (SM_CXSCREEN)
+	      || pScreenInfo->dwHeight != GetSystemMetrics (SM_CYSCREEN)
+	      || pScreenInfo->dwBPP != GetDeviceCaps (hdc, BITSPIXEL)
+	      || pScreenInfo->dwRefreshRate != 0))
+	{
+	  ErrorF ("winAllocateFBShadowDD - Changing video mode\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))
+	    {
+	      ErrorF ("winAllocateFBShadowDD - Could not set "\
+		      "full screen display mode: %08x\n",
+		      ddrval);
+	      return FALSE;
+	    }
+	}
+      else
+	{
+	  ErrorF ("winAllocateFBShadowDD - Not changing video mode\n");
+	}
+
+      /* Release our DC */
+      ReleaseDC (NULL, hdc);
+      hdc = NULL;
+    }
+  else
+    {
+      /* Set the cooperative level for windowed mode */
+      ddrval = IDirectDraw2_SetCooperativeLevel (pScreenPriv->pdd2,
+						 pScreenPriv->hwndScreen,
+						 DDSCL_NORMAL);
+      if (FAILED (ddrval))
+	{
+	  ErrorF ("winAllocateFBShadowDD - Could not set "\
+		  "cooperative level: %08x\n",
+		  ddrval);
+	  return FALSE;
+	}
+    }
+
+  /* Create the primary surface */
+  if (!winCreatePrimarySurfaceShadowDD (pScreen))
+    {
+      ErrorF ("winAllocateFBShadowDD - winCreatePrimarySurfaceShadowDD "
+	      "failed\n");
+      return FALSE;
+    }
+
+  /* Describe the shadow 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->pddsShadow,
+				       NULL);
+  if (FAILED (ddrval))
+    {
+      ErrorF ("winAllocateFBShadowDD - Could not create shadow "\
+	      "surface: %08x\n", ddrval);
+      return FALSE;
+    }
+  
+#if CYGDEBUG
+  ErrorF ("winAllocateFBShadowDD - Created shadow\n");
+#endif
+
+  /* Allocate a DD surface description for our screen privates */
+  pddsdShadow = pScreenPriv->pddsdShadow = malloc (sizeof (DDSURFACEDESC));
+  if (pddsdShadow == NULL)
+    {
+      ErrorF ("winAllocateFBShadowDD - Could not allocate surface "\
+	      "description memory\n");
+      return FALSE;
+    }
+  ZeroMemory (pddsdShadow, sizeof (*pddsdShadow));
+  pddsdShadow->dwSize = sizeof (*pddsdShadow);
+
+#if CYGDEBUG
+  ErrorF ("winAllocateFBShadowDD - Locking shadow\n");
+#endif
+
+  /* Lock the shadow surface */
+  ddrval = IDirectDrawSurface2_Lock (pScreenPriv->pddsShadow,
+				     NULL,
+				     pddsdShadow,
+				     DDLOCK_WAIT,
+				     NULL);
+  if (FAILED (ddrval) || pddsdShadow->lpSurface == NULL)
+    {
+      ErrorF ("winAllocateFBShadowDD - Could not lock shadow "\
+	      "surface: %08x\n", ddrval);
+      return FALSE;
+    }
+
+#if CYGDEBUG
+  ErrorF ("winAllocateFBShadowDD - Locked shadow\n");
+#endif
+
+  /* We don't know how to deal with anything other than RGB */
+  if (!(pddsdShadow->ddpfPixelFormat.dwFlags & DDPF_RGB))
+    {
+      ErrorF ("winAllocateFBShadowDD - Color format other than RGB\n");
+      return FALSE;
+    }
+
+  /* Grab the pitch from the surface desc */
+  pScreenInfo->dwStride = (pddsdShadow->u1.lPitch * 8)
+    / pScreenInfo->dwBPP;
+
+  /* Save the pointer to our surface memory */
+  pScreenInfo->pfb = pddsdShadow->lpSurface;
+  
+  /* Grab the color depth and masks from the surface description */
+  pScreenPriv->dwRedMask = pddsdShadow->ddpfPixelFormat.u2.dwRBitMask;
+  pScreenPriv->dwGreenMask = pddsdShadow->ddpfPixelFormat.u3.dwGBitMask;
+  pScreenPriv->dwBlueMask = pddsdShadow->ddpfPixelFormat.u4.dwBBitMask;
+
+#if CYGDEBUG
+  ErrorF ("winAllocateFBShadowDD - Returning\n");
+#endif
+
+  return TRUE;
+}
+
+
+/*
+ * Transfer the damaged regions of the shadow framebuffer to the display.
+ */
+
+void
+winShadowUpdateDD (ScreenPtr pScreen, 
+		   shadowBufPtr pBuf)
+{
+  winScreenPriv(pScreen);
+  winScreenInfo		*pScreenInfo = pScreenPriv->pScreenInfo;
+  RegionPtr		damage = &pBuf->damage;
+  HRESULT		ddrval = DD_OK;
+  RECT			rcDest, rcSrc;
+  POINT			ptOrigin;
+  DWORD			dwBox = REGION_NUM_RECTS (damage);
+  BoxPtr		pBox = REGION_RECTS (damage);
+  HRGN			hrgnTemp = NULL, hrgnCombined = NULL;
+
+  /*
+   * Return immediately if the app is not active
+   * and we are fullscreen, or if we have a bad display depth
+   */
+  if ((!pScreenPriv->fActive && pScreenInfo->fFullScreen)
+      || pScreenPriv->fBadDepth) return;
+
+  /* Get the origin of the window in the screen coords */
+  ptOrigin.x = pScreenInfo->dwXOffset;
+  ptOrigin.y = pScreenInfo->dwYOffset;
+  MapWindowPoints (pScreenPriv->hwndScreen,
+		   HWND_DESKTOP,
+		   (LPPOINT)&ptOrigin, 1);
+
+  /* Unlock the shadow surface, so we can blit */
+  ddrval = IDirectDrawSurface2_Unlock (pScreenPriv->pddsShadow, NULL);
+  if (FAILED (ddrval))
+    {
+      ErrorF ("winShadowUpdateProcDD - Unlock failed\n");
+      return;
+    }
+
+  /*
+   * Handle small regions with multiple blits,
+   * handle large regions by creating a clipping region and 
+   * doing a single blit constrained to that clipping region.
+   */
+  if (pScreenInfo->dwClipUpdatesNBoxes == 0
+      || dwBox < pScreenInfo->dwClipUpdatesNBoxes)
+    {
+      /* Loop through all boxes in the damaged region */
+      while (dwBox--)
+	{
+	  /* Assign damage box to source rectangle */
+	  rcSrc.left = pBox->x1;
+	  rcSrc.top = pBox->y1;
+	  rcSrc.right = pBox->x2;
+	  rcSrc.bottom = pBox->y2;
+	  
+	  /* Calculate destination rectange */
+	  rcDest.left = ptOrigin.x + rcSrc.left;
+	  rcDest.top = ptOrigin.y + rcSrc.top;
+	  rcDest.right = ptOrigin.x + rcSrc.right;
+	  rcDest.bottom = ptOrigin.y + rcSrc.bottom;
+	  
+	  /* Blit the damaged areas */
+	  ddrval = IDirectDrawSurface2_Blt (pScreenPriv->pddsPrimary,
+					    &rcDest,
+					    pScreenPriv->pddsShadow,
+					    &rcSrc,
+					    DDBLT_WAIT,
+					    NULL);
+	  
+	  /* Get a pointer to the next box */
+	  ++pBox;
+	}
+    }
+  else
+    {
+      BoxPtr		pBoxExtents = REGION_EXTENTS (pScreen, damage);
+
+      /* Compute a GDI region from the damaged region */
+      hrgnCombined = CreateRectRgn (pBox->x1, pBox->y1, pBox->x2, pBox->y2);
+      dwBox--;
+      pBox++;
+      while (dwBox--)
+	{
+	  hrgnTemp = CreateRectRgn (pBox->x1, pBox->y1, pBox->x2, pBox->y2);
+	  CombineRgn (hrgnCombined, hrgnCombined, hrgnTemp, RGN_OR);
+	  DeleteObject (hrgnTemp);
+	  pBox++;
+	}  
+
+      /* Install the GDI region as a clipping region */
+      SelectClipRgn (pScreenPriv->hdcScreen, hrgnCombined);
+      DeleteObject (hrgnCombined);
+      hrgnCombined = NULL;
+
+      /* Calculating a bounding box for the source is easy */
+      rcSrc.left = pBoxExtents->x1;
+      rcSrc.top = pBoxExtents->y1;
+      rcSrc.right = pBoxExtents->x2;
+      rcSrc.bottom = pBoxExtents->y2;
+
+      /* Calculating a bounding box for the destination is trickier */
+      rcDest.left = ptOrigin.x + rcSrc.left;
+      rcDest.top = ptOrigin.y + rcSrc.top;
+      rcDest.right = ptOrigin.x + rcSrc.right;
+      rcDest.bottom = ptOrigin.y + rcSrc.bottom;
+      
+      /* Our Blt should be clipped to the invalidated region */
+      ddrval = IDirectDrawSurface2_Blt (pScreenPriv->pddsPrimary,
+					&rcDest,
+					pScreenPriv->pddsShadow,
+					&rcSrc,
+					DDBLT_WAIT,
+					NULL);
+
+      /* Reset the clip region */
+      SelectClipRgn (pScreenPriv->hdcScreen, NULL);
+    }
+
+  /* Relock the shadow surface */
+  ddrval = IDirectDrawSurface2_Lock (pScreenPriv->pddsShadow,
+				     NULL,
+				     pScreenPriv->pddsdShadow,
+				     DDLOCK_WAIT,
+				     NULL);
+  if (FAILED (ddrval))
+    {
+      ErrorF ("winShadowUpdateProcDD - Lock failed\n");
+      return;
+    }
+
+  /* Has our memory pointer changed? */
+  if (pScreenInfo->pfb != pScreenPriv->pddsdShadow->lpSurface)
+    {
+      ErrorF ("winShadowUpdateProcDD - Memory location of the shadow "
+	      "surface has changed, trying to update the root window "
+	      "pixmap header to point to the new address.  If you get "
+	      "this message and Cygwin/XFree86 freezes or crashes "
+	      "after this message then send a problem report and your "
+	      "/tmp/XWin.log file to cygwin-xfree@cygwin.com\n");
+
+      /* Location of shadow framebuffer has changed */
+      pScreenInfo->pfb = pScreenPriv->pddsdShadow->lpSurface;
+      
+      /* Update the screen pixmap */
+      if (!(*pScreen->ModifyPixmapHeader)(pScreen->devPrivate,
+					  pScreen->width,
+					  pScreen->height,
+					  pScreen->rootDepth,
+					  BitsPerPixel (pScreen->rootDepth),
+					  PixmapBytePad (pScreenInfo->dwStride,
+							 pScreenInfo->dwBPP),
+					  pScreenInfo->pfb))
+	{
+	  ErrorF ("winShadowUpdateProcDD - Bits changed, could not "
+		  "notify fb.\n");
+	  return;
+	}
+    }
+}
+
+
+/*
+ * Call the wrapped CloseScreen function.
+ * 
+ * Free our resources and private structures.
+ */
+
+Bool
+winCloseScreenShadowDD (int nIndex, ScreenPtr pScreen)
+{
+  winScreenPriv(pScreen);
+  winScreenInfo		*pScreenInfo = pScreenPriv->pScreenInfo;
+  Bool			fReturn;
+  
+#if CYGDEBUG
+  ErrorF ("winCloseScreenShadowDD - Freeing screen resources\n");
+#endif
+
+  /* Flag that the screen is closed */
+  pScreenPriv->fClosed = TRUE;
+  pScreenPriv->fActive = FALSE;
+
+  /* Call the wrapped CloseScreen procedure */
+  pScreen->CloseScreen = pScreenPriv->CloseScreen;
+  fReturn = (*pScreen->CloseScreen) (nIndex, pScreen);
+
+  /* Free the screen DC */
+  ReleaseDC (pScreenPriv->hwndScreen, pScreenPriv->hdcScreen);
+
+  /* Delete the window property */
+  RemoveProp (pScreenPriv->hwndScreen, WIN_SCR_PROP);
+
+  /* Free the shadow surface, if there is one */
+  if (pScreenPriv->pddsShadow)
+    {
+      IDirectDrawSurface2_Unlock (pScreenPriv->pddsShadow, NULL);
+      IDirectDrawSurface2_Release (pScreenPriv->pddsShadow);
+      pScreenPriv->pddsShadow = NULL;
+    }
+
+  /* Detach the clipper from the primary surface and release the clipper. */
+  if (pScreenPriv->pddcPrimary)
+    {
+      /* Detach the clipper */
+      IDirectDrawSurface2_SetClipper (pScreenPriv->pddsPrimary,
+				      NULL);
+
+      /* Release the clipper object */
+      IDirectDrawClipper_Release (pScreenPriv->pddcPrimary);
+      pScreenPriv->pddcPrimary = NULL;
+    }
+
+  /* Release the primary surface, if there is one */
+  if (pScreenPriv->pddsPrimary)
+    {
+      IDirectDrawSurface2_Release (pScreenPriv->pddsPrimary);
+      pScreenPriv->pddsPrimary = NULL;
+    }
+
+  /* Free the DirectDraw2 object, if there is one */
+  if (pScreenPriv->pdd2)
+    {
+      IDirectDraw2_RestoreDisplayMode (pScreenPriv->pdd2);
+      IDirectDraw2_Release (pScreenPriv->pdd2);
+      pScreenPriv->pdd2 = NULL;
+    }
+
+  /* Free the DirectDraw object, if there is one */
+  if (pScreenPriv->pdd)
+    {
+      IDirectDraw_Release (pScreenPriv->pdd);
+      pScreenPriv->pdd = NULL;
+    }
+
+  /* Kill our window */
+  if (pScreenPriv->hwndScreen)
+    {
+      DestroyWindow (pScreenPriv->hwndScreen);
+      pScreenPriv->hwndScreen = NULL;
+    }
+
+  /* Destroy the thread startup mutex */
+  pthread_mutex_destroy (&pScreenPriv->pmServerStarted);
+
+  /* Kill our screeninfo's pointer to the screen */
+  pScreenInfo->pScreen = NULL;
+
+  /* Invalidate the ScreenInfo's fb pointer */
+  pScreenInfo->pfb = 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.
+ */
+
+Bool
+winInitVisualsShadowDD (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 == 0 || dwGreenBits == 0 || dwBlueBits == 0)
+    pScreenPriv->dwBitsPerRGB = 8;
+  else if (dwRedBits > dwGreenBits && dwRedBits > dwBlueBits)
+    pScreenPriv->dwBitsPerRGB = dwRedBits;
+  else if (dwGreenBits > dwRedBits && dwGreenBits > dwBlueBits)
+    pScreenPriv->dwBitsPerRGB = dwGreenBits;
+  else
+    pScreenPriv->dwBitsPerRGB = dwBlueBits;
+  
+  ErrorF ("winInitVisualsShadowDD - Masks %08x %08x %08x BPRGB %d d %d "
+	  "bpp %d\n",
+	  pScreenPriv->dwRedMask,
+	  pScreenPriv->dwGreenMask,
+	  pScreenPriv->dwBlueMask,
+	  pScreenPriv->dwBitsPerRGB,
+	  pScreenInfo->dwDepth,
+	  pScreenInfo->dwBPP);
+
+  /* Create a single visual according to the Windows screen depth */
+  switch (pScreenInfo->dwDepth)
+    {
+    case 24:
+    case 16:
+    case 15:
+#if defined(XFree86Server)
+      /* Create the real visual */
+      if (!miSetVisualTypesAndMasks (pScreenInfo->dwDepth,
+				     TrueColorMask,
+				     pScreenPriv->dwBitsPerRGB,
+				     TrueColor,
+				     pScreenPriv->dwRedMask,
+				     pScreenPriv->dwGreenMask,
+				     pScreenPriv->dwBlueMask))
+	{
+	  ErrorF ("winInitVisualsShadowDD - miSetVisualTypesAndMasks "
+		  "failed for TrueColor\n");
+	  return FALSE;
+	}
+
+#if WIN_EMULATE_PSEUDO_SUPPORT
+      if (!pScreenInfo->fEmulatePseudo)
+	break;
+
+      /* Setup a pseudocolor visual */
+      if (!miSetVisualTypesAndMasks (8,
+				     PseudoColorMask,
+				     8,
+				     -1,
+				     0,
+				     0,
+				     0))
+	{
+	  ErrorF ("winInitVisualsShadowDD - miSetVisualTypesAndMasks "
+		  "failed for PseudoColor\n");
+	  return FALSE;
+	}
+#endif
+#else /* XFree86Server */
+      /* Create the real visual */
+      if (!fbSetVisualTypesAndMasks (pScreenInfo->dwDepth,
+				     TrueColorMask,
+				     pScreenPriv->dwBitsPerRGB,
+				     pScreenPriv->dwRedMask,
+				     pScreenPriv->dwGreenMask,
+				     pScreenPriv->dwBlueMask))
+	{
+	  ErrorF ("winInitVisualsShadowDD - fbSetVisualTypesAndMasks "
+		  "failed for TrueColor\n");
+	  return FALSE;
+	}
+
+#if WIN_EMULATE_PSEUDO_SUPPORT
+      if (!pScreenInfo->fEmulatePseudo)
+	break;
+
+      /* Setup a pseudocolor visual */
+      if (!fbSetVisualTypesAndMasks (8,
+				     PseudoColorMask,
+				     8,
+				     0,
+				     0,
+				     0))
+	{
+	  ErrorF ("winInitVisualsShadowDD - fbSetVisualTypesAndMasks "
+		  "failed for PseudoColor\n");
+	  return FALSE;
+	}
+#endif
+#endif /* XFree86Server */
+      break;
+
+    case 8:
+#if defined(XFree86Server)
+      if (!miSetVisualTypesAndMasks (pScreenInfo->dwDepth,
+				     pScreenInfo->fFullScreen 
+				     ? PseudoColorMask : StaticColorMask,
+				     pScreenPriv->dwBitsPerRGB,
+				     pScreenInfo->fFullScreen 
+				     ? PseudoColor : StaticColor,
+				     pScreenPriv->dwRedMask,
+				     pScreenPriv->dwGreenMask,
+				     pScreenPriv->dwBlueMask))
+	{
+	  ErrorF ("winInitVisualsShadowDD - miSetVisualTypesAndMasks "
+		  "failed\n");
+	  return FALSE;
+	}
+#else /* XFree86Server */
+      if (!fbSetVisualTypesAndMasks (pScreenInfo->dwDepth,
+				     pScreenInfo->fFullScreen 
+				     ? PseudoColorMask : StaticColorMask,
+				     pScreenPriv->dwBitsPerRGB,
+				     pScreenPriv->dwRedMask,
+				     pScreenPriv->dwGreenMask,
+				     pScreenPriv->dwBlueMask))
+	{
+	  ErrorF ("winInitVisualsShadowDD - fbSetVisualTypesAndMasks "
+		  "failed\n");
+	  return FALSE;
+	}
+#endif /* XFree86Server */
+      break;
+
+    default:
+      ErrorF ("winInitVisualsShadowDD - Unknown screen depth\n");
+      return FALSE;
+    }
+
+#if CYGDEBUG
+  ErrorF ("winInitVisualsShadowDD - Returning\n");
+#endif
+
+  return TRUE;
+}
+
+
+/*
+ * Adjust the user proposed video mode
+ */
+
+Bool
+winAdjustVideoModeShadowDD (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 ("winAdjustVideoModeShadowDD - 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->dwBPP == WIN_DEFAULT_BPP)
+    {
+      /* No -depth parameter passed, let the user know the depth being used */
+      ErrorF ("winAdjustVideoModeShadowDD - Using Windows display "
+	      "depth of %d bits per pixel\n", dwBPP);
+
+      /* Use GDI's depth */
+      pScreenInfo->dwBPP = dwBPP;
+    }
+  else if (pScreenInfo->fFullScreen
+	   && pScreenInfo->dwBPP != dwBPP)
+    {
+      /* FullScreen, and GDI depth differs from -depth parameter */
+      ErrorF ("winAdjustVideoModeShadowDD - FullScreen, using command line "
+	      "bpp: %d\n", pScreenInfo->dwBPP);
+    }
+  else if (dwBPP != pScreenInfo->dwBPP)
+    {
+      /* Windowed, and GDI depth differs from -depth parameter */
+      ErrorF ("winAdjustVideoModeShadowDD - Windowed, command line bpp: "
+	      "%d, using bpp: %d\n", pScreenInfo->dwBPP, dwBPP);
+
+      /* We'll use GDI's depth */
+      pScreenInfo->dwBPP = dwBPP;
+    }
+  
+  /* See if the shadow bitmap will be larger than the DIB size limit */
+  if (pScreenInfo->dwWidth * pScreenInfo->dwHeight * pScreenInfo->dwBPP
+      >= WIN_DIB_MAXIMUM_SIZE)
+    {
+      ErrorF ("winAdjustVideoModeShadowDD - Requested DirectDraw surface "
+	      "will be larger than %d MB.  The surface may fail to be "
+	      "allocated on Windows 95, 98, or Me, due to a %d MB limit in "
+	      "DIB size.  This limit does not apply to Windows NT/2000, and "
+	      "this message may be ignored on those platforms.\n",
+	      WIN_DIB_MAXIMUM_SIZE_MB, WIN_DIB_MAXIMUM_SIZE_MB);
+    }
+
+  /* Release our DC */
+  ReleaseDC (NULL, hdc);
+  return TRUE;
+}
+
+
+/*
+ * Blt exposed regions to the screen
+ */
+
+Bool
+winBltExposedRegionsShadowDD (ScreenPtr pScreen)
+{
+  winScreenPriv(pScreen);
+  winScreenInfo		*pScreenInfo = pScreenPriv->pScreenInfo;
+  RECT			rcSrc, rcDest;
+  POINT			ptOrigin;
+  HDC			hdcUpdate = NULL;
+  PAINTSTRUCT		ps;
+  HRESULT		ddrval = DD_OK;
+  Bool			fReturn = TRUE;
+  Bool			fLocked = TRUE;
+  int			i;
+
+  /* BeginPaint gives us an hdc that clips to the invalidated region */
+  hdcUpdate = BeginPaint (pScreenPriv->hwndScreen, &ps);
+  if (hdcUpdate == NULL)
+    {
+      ErrorF ("winBltExposedRegionsShadowDD - BeginPaint () returned "
+	      "a NULL device context handle.  Aborting blit attempt.\n");
+      return FALSE;
+    }
+  
+  /* Unlock the shadow surface, so we can blit */
+  ddrval = IDirectDrawSurface2_Unlock (pScreenPriv->pddsShadow, NULL);
+  if (FAILED (ddrval))
+    {
+      fReturn = FALSE;
+      goto winBltExposedRegionsShadowDD_Exit;
+    }
+  else
+    {
+      /* Flag that we have unlocked the shadow surface */
+      fLocked = FALSE;
+    }
+
+  /* Get the origin of the window in the screen coords */
+  ptOrigin.x = pScreenInfo->dwXOffset;
+  ptOrigin.y = pScreenInfo->dwYOffset;
+
+  MapWindowPoints (pScreenPriv->hwndScreen,
+		   HWND_DESKTOP,
+		   (LPPOINT)&ptOrigin, 1);
+  rcDest.left = ptOrigin.x;
+  rcDest.right = ptOrigin.x + pScreenInfo->dwWidth;
+  rcDest.top = ptOrigin.y;
+  rcDest.bottom = ptOrigin.y + pScreenInfo->dwHeight;
+
+  /* Source can be enter shadow surface, as Blt should clip */
+  rcSrc.left = 0;
+  rcSrc.top = 0;
+  rcSrc.right = pScreenInfo->dwWidth;
+  rcSrc.bottom = pScreenInfo->dwHeight;
+
+  /* Try to regain the primary surface and blit again if we've lost it */
+  for (i = 0; i <= WIN_REGAIN_SURFACE_RETRIES; ++i)
+    {
+      /* Our Blt should be clipped to the invalidated region */
+      ddrval = IDirectDrawSurface2_Blt (pScreenPriv->pddsPrimary,
+					&rcDest,
+					pScreenPriv->pddsShadow,
+					&rcSrc,
+					DDBLT_WAIT,
+					NULL);
+      if (ddrval == DDERR_SURFACELOST)
+	{
+	  /* Surface was lost */
+	  ErrorF ("winBltExposedRegionsShadowDD - IDirectDrawSurface2_Blt "
+		  "reported that the primary surface was lost, "
+		  "trying to restore, retry: %d\n", i + 1);
+
+	  /* Try to restore the surface, once */
+	  ddrval = IDirectDrawSurface2_Restore (pScreenPriv->pddsPrimary);
+	  ErrorF ("winBltExposedRegionsShadowDDNL - "
+		  "IDirectDrawSurface2_Restore returned: ");
+	  if (ddrval == DD_OK)
+	    continue;
+	  else if (ddrval == DDERR_WRONGMODE)
+	    ErrorF ("DDERR_WRONGMODE\n");
+	  else if (ddrval == DDERR_INCOMPATIBLEPRIMARY)
+	    ErrorF ("DDERR_INCOMPATIBLEPRIMARY\n");
+	  else if (ddrval == DDERR_UNSUPPORTED)
+	    ErrorF ("DDERR_UNSUPPORTED\n");
+	  else if (ddrval == DDERR_INVALIDPARAMS)
+	    ErrorF ("DDERR_INVALIDPARAMS\n");
+	  else if (ddrval == DDERR_INVALIDOBJECT)
+	    ErrorF ("DDERR_INVALIDOBJECT\n");
+	  else
+	    ErrorF ("unknown error: %08x\n", ddrval);
+
+	  /* Loop around to try the blit one more time */
+	  continue;
+	}
+      else if (FAILED (ddrval))
+	{
+	  fReturn = FALSE;
+	  ErrorF ("winBltExposedRegionsShadowDD - IDirectDrawSurface2_Blt "
+		  "failed, but surface not lost: %08x %d\n", ddrval, ddrval);
+	  goto winBltExposedRegionsShadowDD_Exit;
+	}
+      else
+	{
+	  /* Success, stop looping */
+	  break;
+	}
+    }
+
+  /* Relock the shadow surface */
+  ddrval = IDirectDrawSurface2_Lock (pScreenPriv->pddsShadow,
+				     NULL,
+				     pScreenPriv->pddsdShadow,
+				     DDLOCK_WAIT,
+				     NULL);
+  if (FAILED (ddrval))
+    {
+      fReturn = FALSE;
+      ErrorF ("winBltExposedRegionsShadowDD - IDirectDrawSurface2_Lock "
+	      "failed\n");
+      goto winBltExposedRegionsShadowDD_Exit;
+    }
+  else
+    {
+      /* Indicate that we have relocked the shadow surface */
+      fLocked = TRUE;
+    }
+
+  /* Has our memory pointer changed? */
+  if (pScreenInfo->pfb != pScreenPriv->pddsdShadow->lpSurface)
+    winUpdateFBPointer (pScreen,
+			pScreenPriv->pddsdShadow->lpSurface);
+
+ winBltExposedRegionsShadowDD_Exit:
+  /* EndPaint frees the DC */
+  if (hdcUpdate != NULL)
+    EndPaint (pScreenPriv->hwndScreen, &ps);
+
+  /*
+   * Relock the surface if it is not locked.  We don't care if locking fails,
+   * as it will cause the server to shutdown within a few more operations.
+   */
+  if (!fLocked)
+    {
+      IDirectDrawSurface2_Lock (pScreenPriv->pddsShadow,
+				NULL,
+				pScreenPriv->pddsdShadow,
+				DDLOCK_WAIT,
+				NULL);
+
+      /* Has our memory pointer changed? */
+      if (pScreenInfo->pfb != pScreenPriv->pddsdShadow->lpSurface)
+	winUpdateFBPointer (pScreen,
+			    pScreenPriv->pddsdShadow->lpSurface);
+      
+      fLocked = TRUE;
+    }
+  return fReturn;
+}
+
+
+/*
+ * Do any engine-specific appliation-activation processing
+ */
+
+Bool
+winActivateAppShadowDD (ScreenPtr pScreen)
+{
+  winScreenPriv(pScreen);
+
+  /*
+   * Do we have a surface?
+   * Are we active?
+   * Are we fullscreen?
+   */
+  if (pScreenPriv != NULL
+      && pScreenPriv->pddsPrimary != NULL
+      && pScreenPriv->fActive)
+    {
+      /* Primary surface was lost, restore it */
+      IDirectDrawSurface2_Restore (pScreenPriv->pddsPrimary);
+    }
+
+  return TRUE;
+}
+
+
+/*
+ * Reblit the shadow framebuffer to the screen.
+ */
+
+Bool
+winRedrawScreenShadowDD (ScreenPtr pScreen)
+{
+  winScreenPriv(pScreen);
+  winScreenInfo		*pScreenInfo = pScreenPriv->pScreenInfo;
+  HRESULT		ddrval = DD_OK;
+  RECT			rcSrc, rcDest;
+  POINT			ptOrigin;
+
+  /* Get the origin of the window in the screen coords */
+  ptOrigin.x = pScreenInfo->dwXOffset;
+  ptOrigin.y = pScreenInfo->dwYOffset;
+  MapWindowPoints (pScreenPriv->hwndScreen,
+		   HWND_DESKTOP,
+		   (LPPOINT)&ptOrigin, 1);
+  rcDest.left = ptOrigin.x;
+  rcDest.right = ptOrigin.x + pScreenInfo->dwWidth;
+  rcDest.top = ptOrigin.y;
+  rcDest.bottom = ptOrigin.y + pScreenInfo->dwHeight;
+
+  /* Source can be entire shadow surface, as Blt should clip for us */
+  rcSrc.left = 0;
+  rcSrc.top = 0;
+  rcSrc.right = pScreenInfo->dwWidth;
+  rcSrc.bottom = pScreenInfo->dwHeight;
+
+  /* Redraw the whole window, to take account for the new colors */
+  ddrval = IDirectDrawSurface2_Blt (pScreenPriv->pddsPrimary,
+				    &rcDest,
+				    pScreenPriv->pddsShadow,
+				    &rcSrc,
+				    DDBLT_WAIT,
+				    NULL);
+  if (FAILED (ddrval))
+    {
+      ErrorF ("winRedrawScreenShadowDD - IDirectDrawSurface_Blt () "
+	      "failed: %08x\n",
+	      ddrval);
+    }
+
+  return TRUE;
+}
+
+
+/*
+ * Realize the currently installed colormap
+ */
+
+Bool
+winRealizeInstalledPaletteShadowDD (ScreenPtr pScreen)
+{
+  return TRUE;
+}
+
+
+/*
+ * Install the specified colormap
+ */
+
+Bool
+winInstallColormapShadowDD (ColormapPtr pColormap)
+{
+  ScreenPtr		pScreen = pColormap->pScreen;
+  winScreenPriv(pScreen);
+  winCmapPriv(pColormap);
+  HRESULT		ddrval = DD_OK;
+
+  /* Install the DirectDraw palette on the primary surface */
+  ddrval = IDirectDrawSurface2_SetPalette (pScreenPriv->pddsPrimary,
+					   pCmapPriv->lpDDPalette);
+  if (FAILED (ddrval))
+    {
+      ErrorF ("winInstallColormapShadowDD - Failed installing the "
+	      "DirectDraw palette.\n");
+      return FALSE;
+    }
+
+  /* Save a pointer to the newly installed colormap */
+  pScreenPriv->pcmapInstalled = pColormap;
+
+  return TRUE;
+}
+
+
+/*
+ * Store the specified colors in the specified colormap
+ */
+
+Bool
+winStoreColorsShadowDD (ColormapPtr pColormap, 
+			int ndef,
+			xColorItem *pdefs)
+{
+  ScreenPtr		pScreen = pColormap->pScreen;
+  winScreenPriv(pScreen);
+  winCmapPriv(pColormap);
+  ColormapPtr		curpmap = pScreenPriv->pcmapInstalled;
+  HRESULT		ddrval = DD_OK;
+  
+  /* Put the X colormap entries into the Windows logical palette */
+  ddrval = IDirectDrawPalette_SetEntries (pCmapPriv->lpDDPalette,
+					  0,
+					  pdefs[0].pixel,
+					  ndef,
+					  pCmapPriv->peColors 
+					  + pdefs[0].pixel);
+  if (FAILED (ddrval))
+    {
+      ErrorF ("winStoreColorsShadowDDNL - SetEntries () failed\n");
+      return FALSE;
+    }
+
+  /* Don't install the DirectDraw palette if the colormap is not installed */
+  if (pColormap != curpmap)
+    {
+      return TRUE;
+    }
+
+  if (!winInstallColormapShadowDD (pColormap))
+    {
+      ErrorF ("winStoreColorsShadowDDNL - Failed installing colormap\n");
+      return FALSE;
+    }
+
+  return TRUE;
+}
+
+
+/*
+ * Colormap initialization procedure
+ */
+
+Bool
+winCreateColormapShadowDD (ColormapPtr pColormap)
+{
+  HRESULT		ddrval = DD_OK;
+  ScreenPtr		pScreen = pColormap->pScreen;
+  winScreenPriv(pScreen);
+  winCmapPriv(pColormap);
+  
+  /* Create a DirectDraw palette */
+  ddrval = IDirectDraw2_CreatePalette (pScreenPriv->pdd,
+				       DDPCAPS_8BIT | DDPCAPS_ALLOW256,
+				       pCmapPriv->peColors,
+				       &pCmapPriv->lpDDPalette,
+				       NULL);
+  if (FAILED (ddrval))
+    {
+      ErrorF ("winCreateColormapShadowDDNL - CreatePalette failed\n");
+      return FALSE;
+    }
+
+  return TRUE;
+}
+
+
+/*
+ * Colormap destruction procedure
+ */
+
+Bool
+winDestroyColormapShadowDD (ColormapPtr pColormap)
+{
+  winScreenPriv(pColormap->pScreen);
+  winCmapPriv(pColormap);
+  HRESULT		ddrval = DD_OK;
+
+  /*
+   * Is colormap to be destroyed the default?
+   *
+   * Non-default colormaps should have had winUninstallColormap
+   * called on them before we get here.  The default colormap
+   * will not have had winUninstallColormap called on it.  Thus,
+   * we need to handle the default colormap in a special way.
+   */
+  if (pColormap->flags & IsDefault)
+    {
+#if CYGDEBUG
+      ErrorF ("winDestroyColormapShadowDDNL - Destroying default "
+	      "colormap\n");
+#endif
+      
+      /*
+       * FIXME: Walk the list of all screens, popping the default
+       * palette out of each screen device context.
+       */
+      
+      /* Pop the palette out of the primary surface */
+      ddrval = IDirectDrawSurface2_SetPalette (pScreenPriv->pddsPrimary,
+					       NULL);
+      if (FAILED (ddrval))
+	{
+	  ErrorF ("winDestroyColormapShadowDDNL - Failed freeing the "
+		  "default colormap DirectDraw palette.\n");
+	  return FALSE;
+	}
+
+      /* Clear our private installed colormap pointer */
+      pScreenPriv->pcmapInstalled = NULL;
+    }
+  
+  /* Release the palette */
+  IDirectDrawPalette_Release (pCmapPriv->lpDDPalette);
+ 
+  /* Invalidate the colormap privates */
+  pCmapPriv->lpDDPalette = NULL;
+
+  return TRUE;
+}
+
+
+/*
+ * Set engine specific functions
+ */
+
+Bool
+winSetEngineFunctionsShadowDD (ScreenPtr pScreen)
+{
+  winScreenPriv(pScreen);
+  winScreenInfo		*pScreenInfo = pScreenPriv->pScreenInfo;
+  
+  /* Set our pointers */
+  pScreenPriv->pwinAllocateFB = winAllocateFBShadowDD;
+  pScreenPriv->pwinShadowUpdate = winShadowUpdateDD;
+  pScreenPriv->pwinCloseScreen = winCloseScreenShadowDD;
+  pScreenPriv->pwinInitVisuals = winInitVisualsShadowDD;
+  pScreenPriv->pwinAdjustVideoMode = winAdjustVideoModeShadowDD;
+  if (pScreenInfo->fFullScreen)
+    pScreenPriv->pwinCreateBoundingWindow = winCreateBoundingWindowFullScreen;
+  else
+    pScreenPriv->pwinCreateBoundingWindow = winCreateBoundingWindowWindowed;
+  pScreenPriv->pwinFinishScreenInit = winFinishScreenInitFB;
+  pScreenPriv->pwinBltExposedRegions = winBltExposedRegionsShadowDD;
+  pScreenPriv->pwinActivateApp = winActivateAppShadowDD;
+  pScreenPriv->pwinRedrawScreen = winRedrawScreenShadowDD;
+  pScreenPriv->pwinRealizeInstalledPalette
+    = winRealizeInstalledPaletteShadowDD;
+  pScreenPriv->pwinInstallColormap = winInstallColormapShadowDD;
+  pScreenPriv->pwinStoreColors = winStoreColorsShadowDD;
+  pScreenPriv->pwinCreateColormap = winCreateColormapShadowDD;
+  pScreenPriv->pwinDestroyColormap = winDestroyColormapShadowDD;
+  pScreenPriv->pwinHotKeyAltTab = (winHotKeyAltTabProcPtr) (void (*)())NoopDDA;
+  pScreenPriv->pwinCreatePrimarySurface = winCreatePrimarySurfaceShadowDD;
+  pScreenPriv->pwinReleasePrimarySurface = winReleasePrimarySurfaceShadowDD;
+
+  return TRUE;
+}
+