1 files changed, 352 insertions, 336 deletions
diff --git a/xorg-server/hw/xwin/winengine.c b/xorg-server/hw/xwin/winengine.c
index fb9aed8a0..1e3ee2bef 100644
--- a/xorg-server/hw/xwin/winengine.c
+++ b/xorg-server/hw/xwin/winengine.c
@@ -1,336 +1,352 @@
-/*
- *Copyright (C) 2001-2004 Harold L Hunt II 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 HAROLD L HUNT II 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 Harold L Hunt II
- *shall not be used in advertising or otherwise to promote the sale, use
- *or other dealings in this Software without prior written authorization
- *from Harold L Hunt II.
- *
- * Authors:	Harold L Hunt II
- */
-
-#ifdef HAVE_XWIN_CONFIG_H
-#include <xwin-config.h>
-#endif
-#include "win.h"
-#include "winmsg.h"
-
-
-/*
- * External global variables
- */
-
-extern const GUID _IID_IDirectDraw4;
-
-
-/*
- * Detect engines supported by current Windows version
- * DirectDraw version and hardware
- */
-
-void
-winDetectSupportedEngines (void)
-{
-  OSVERSIONINFO		osvi;
-
-  /* Initialize the engine support flags */
-  g_dwEnginesSupported = WIN_SERVER_SHADOW_GDI;
-
-#ifdef XWIN_NATIVEGDI
-  g_dwEnginesSupported |= WIN_SERVER_NATIVE_GDI;
-#endif
-
-  /* Get operating system version information */
-  ZeroMemory (&osvi, sizeof (osvi));
-  osvi.dwOSVersionInfoSize = sizeof (osvi);
-  GetVersionEx (&osvi);
-
-  /* Branch on platform ID */
-  switch (osvi.dwPlatformId)
-    {
-    case VER_PLATFORM_WIN32_NT:
-      /* Engine 4 is supported on NT only */
-      winErrorFVerb (2, "winDetectSupportedEngines - Windows NT/2000/XP\n");
-      break;
-
-    case VER_PLATFORM_WIN32_WINDOWS:
-      /* Engine 4 is supported on NT only */
-      winErrorFVerb (2, "winDetectSupportedEngines - Windows 95/98/Me\n");
-      break;
-    }
-
-  /* Do we have DirectDraw? */
-  if (g_hmodDirectDraw != NULL)
-    {
-      LPDIRECTDRAW	lpdd = NULL;
-      LPDIRECTDRAW4	lpdd4 = NULL;
-      HRESULT		ddrval;
-
-      /* Was the DirectDrawCreate function found? */
-      if (g_fpDirectDrawCreate == NULL)
-	{
-	  /* No DirectDraw support */
-	  return;
-	}
-
-      /* DirectDrawCreate exists, try to call it */
-      /* Create a DirectDraw object, store the address at lpdd */
-      ddrval = (*g_fpDirectDrawCreate) (NULL,
-					(void**) &lpdd,
-					NULL);
-      if (FAILED (ddrval))
-	{
-	  /* No DirectDraw support */
-	  winErrorFVerb (2, "winDetectSupportedEngines - DirectDraw not installed\n");
-	  return;
-	}
-      else
-	{
-	  /* We have DirectDraw */
-	  winErrorFVerb (2, "winDetectSupportedEngines - DirectDraw installed\n");
-	  g_dwEnginesSupported |= WIN_SERVER_SHADOW_DD;
-
-#ifdef XWIN_PRIMARYFB
-	  /* Allow PrimaryDD engine if NT */
-	  if (osvi.dwPlatformId == VER_PLATFORM_WIN32_NT)
-	    {
-	      g_dwEnginesSupported |= WIN_SERVER_PRIMARY_DD;
-	      winErrorFVerb (2, "winDetectSupportedEngines - Allowing PrimaryDD\n");
-	    }
-#endif
-	}
-      
-      /* Try to query for DirectDraw4 interface */
-      ddrval = IDirectDraw_QueryInterface (lpdd,
-					   &IID_IDirectDraw4,
-					   (LPVOID*) &lpdd4);
-      if (SUCCEEDED (ddrval))
-	{
-	  /* We have DirectDraw4 */
-	  winErrorFVerb (2, "winDetectSupportedEngines - DirectDraw4 installed\n");
-	  g_dwEnginesSupported |= WIN_SERVER_SHADOW_DDNL;
-	}
-
-      /* Cleanup DirectDraw interfaces */
-      if (lpdd4 != NULL)
-	IDirectDraw_Release (lpdd4);
-      if (lpdd != NULL)
-	IDirectDraw_Release (lpdd);
-    }
-
-  winErrorFVerb (2, "winDetectSupportedEngines - Returning, supported engines %08x\n",
-	  (unsigned int) g_dwEnginesSupported);
-}
-
-
-/*
- * Set the engine type, depending on the engines
- * supported for this screen, and whether the user
- * suggested an engine type
- */
-
-Bool
-winSetEngine (ScreenPtr pScreen)
-{
-  winScreenPriv(pScreen);
-  winScreenInfo		*pScreenInfo = pScreenPriv->pScreenInfo;
-  HDC			hdc;
-  DWORD			dwBPP;
-
-  /* Get a DC */
-  hdc = GetDC (NULL);
-  if (hdc == NULL)
-    {
-      ErrorF ("winSetEngine - Couldn't get an HDC\n");
-      return FALSE;
-    }
-
-  /*
-   * pScreenInfo->dwBPP may be 0 to indicate that the current screen
-   * depth is to be used.  Thus, we must query for the current display
-   * depth here.
-   */
-  dwBPP = GetDeviceCaps (hdc, BITSPIXEL);
-
-  /* Release the DC */
-  ReleaseDC (NULL, hdc);
-  hdc = NULL;
-
-  /* ShadowGDI is the only engine that supports windowed PseudoColor */
-  if (dwBPP == 8 && !pScreenInfo->fFullScreen)
-    {
-      winErrorFVerb (2, "winSetEngine - Windowed && PseudoColor => ShadowGDI\n");
-      pScreenInfo->dwEngine = WIN_SERVER_SHADOW_GDI;
-
-      /* Set engine function pointers */
-      winSetEngineFunctionsShadowGDI (pScreen);
-      return TRUE;
-    }
-
-  /* ShadowGDI is the only engine that supports Multi Window Mode */
-  if (
-#ifdef XWIN_MULTIWINDOWEXTWM
-      pScreenInfo->fMWExtWM
-#else
-      FALSE
-#endif
-#ifdef XWIN_MULTIWINDOW
-      || pScreenInfo->fMultiWindow
-#else
-      || FALSE
-#endif
-      )
-    {
-      winErrorFVerb (2, "winSetEngine - Multi Window or Rootless => ShadowGDI\n");
-      pScreenInfo->dwEngine = WIN_SERVER_SHADOW_GDI;
-
-      /* Set engine function pointers */
-      winSetEngineFunctionsShadowGDI (pScreen);
-      return TRUE;
-    }
-
-  /* If the user's choice is supported, we'll use that */
-  if (g_dwEnginesSupported & pScreenInfo->dwEnginePreferred)
-    {
-      winErrorFVerb (2, "winSetEngine - Using user's preference: %d\n",
-	      (int) pScreenInfo->dwEnginePreferred);
-      pScreenInfo->dwEngine = pScreenInfo->dwEnginePreferred;
-
-      /* Setup engine function pointers */
-      switch (pScreenInfo->dwEngine)
-	{
-	case WIN_SERVER_SHADOW_GDI:
-	  winSetEngineFunctionsShadowGDI (pScreen);
-	  break;
-	case WIN_SERVER_SHADOW_DD:
-	  winSetEngineFunctionsShadowDD (pScreen);
-	  break;
-	case WIN_SERVER_SHADOW_DDNL:
-	  winSetEngineFunctionsShadowDDNL (pScreen);
-	  break;
-#ifdef XWIN_PRIMARYFB
-	case WIN_SERVER_PRIMARY_DD:
-	  winSetEngineFunctionsPrimaryDD (pScreen);
-	  break;
-#endif
-#ifdef XWIN_NATIVEGDI
-	case WIN_SERVER_NATIVE_GDI:
-	  winSetEngineFunctionsNativeGDI (pScreen);
-	  break;
-#endif
-	default:
-	  FatalError ("winSetEngine - Invalid engine type\n");
-	}
-      return TRUE;
-    }
-
-  /* ShadowDDNL has good performance, so why not */
-  if (g_dwEnginesSupported & WIN_SERVER_SHADOW_DDNL)
-    {
-      winErrorFVerb (2, "winSetEngine - Using Shadow DirectDraw NonLocking\n");
-      pScreenInfo->dwEngine = WIN_SERVER_SHADOW_DDNL;
-
-      /* Set engine function pointers */
-      winSetEngineFunctionsShadowDDNL (pScreen);
-      return TRUE;
-    }
-
-  /* ShadowDD is next in line */
-  if (g_dwEnginesSupported & WIN_SERVER_SHADOW_DD)
-    {
-      winErrorFVerb (2, "winSetEngine - Using Shadow DirectDraw\n");
-      pScreenInfo->dwEngine = WIN_SERVER_SHADOW_DD;
-
-      /* Set engine function pointers */
-      winSetEngineFunctionsShadowDD (pScreen);
-      return TRUE;
-    }
-
-  /* ShadowGDI is next in line */
-  if (g_dwEnginesSupported & WIN_SERVER_SHADOW_GDI)
-    {
-      winErrorFVerb (2, "winSetEngine - Using Shadow GDI DIB\n");
-      pScreenInfo->dwEngine = WIN_SERVER_SHADOW_GDI;
-
-      /* Set engine function pointers */
-      winSetEngineFunctionsShadowGDI (pScreen);
-      return TRUE;
-    }
-
-  return TRUE;
-}
-
-
-/*
- * Get procedure addresses for DirectDrawCreate and DirectDrawCreateClipper
- */
-
-Bool
-winGetDDProcAddresses (void)
-{
-  Bool			fReturn = TRUE;
-  
-  /* Load the DirectDraw library */
-  g_hmodDirectDraw = LoadLibraryEx ("ddraw.dll", NULL, 0);
-  if (g_hmodDirectDraw == NULL)
-    {
-      ErrorF ("winGetDDProcAddresses - Could not load ddraw.dll\n");
-      fReturn = TRUE;
-      goto winGetDDProcAddresses_Exit;
-    }
-
-  /* Try to get the DirectDrawCreate address */
-  g_fpDirectDrawCreate = GetProcAddress (g_hmodDirectDraw,
-					 "DirectDrawCreate");
-  if (g_fpDirectDrawCreate == NULL)
-    {
-      ErrorF ("winGetDDProcAddresses - Could not get DirectDrawCreate "
-	      "address\n");
-      fReturn = TRUE;
-      goto winGetDDProcAddresses_Exit;
-    }
-
-  /* Try to get the DirectDrawCreateClipper address */
-  g_fpDirectDrawCreateClipper = GetProcAddress (g_hmodDirectDraw,
-						"DirectDrawCreateClipper");
-  if (g_fpDirectDrawCreateClipper == NULL)
-    {
-      ErrorF ("winGetDDProcAddresses - Could not get "
-	      "DirectDrawCreateClipper address\n");
-      fReturn = FALSE;
-      goto winGetDDProcAddresses_Exit;
-    }
-
-  /*
-   * Note: Do not unload ddraw.dll here.  Do it in GiveUp
-   */
-
- winGetDDProcAddresses_Exit:
-  /* Unload the DirectDraw library if we failed to initialize */
-  if (!fReturn && g_hmodDirectDraw != NULL)
-    {
-      FreeLibrary (g_hmodDirectDraw);
-      g_hmodDirectDraw = NULL;
-    }
-  
-  return fReturn;
-}
+/*
+ *Copyright (C) 2001-2004 Harold L Hunt II 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 HAROLD L HUNT II 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 Harold L Hunt II
+ *shall not be used in advertising or otherwise to promote the sale, use
+ *or other dealings in this Software without prior written authorization
+ *from Harold L Hunt II.
+ *
+ * Authors:	Harold L Hunt II
+ */
+
+#ifdef HAVE_XWIN_CONFIG_H
+#include <xwin-config.h>
+#endif
+#include "win.h"
+#include "winmsg.h"
+
+/*
+ * Global variables for function pointers into
+ * dynamically loaded libraries
+ */
+FARPROC		g_fpDirectDrawCreate = NULL;
+FARPROC		g_fpDirectDrawCreateClipper = NULL;
+
+/*
+  module handle for dynamically loaded directdraw library
+*/
+static HMODULE g_hmodDirectDraw = NULL;
+
+/*
+ * Detect engines supported by current Windows version
+ * DirectDraw version and hardware
+ */
+
+void
+winDetectSupportedEngines (void)
+{
+  OSVERSIONINFO		osvi;
+
+  /* Initialize the engine support flags */
+  g_dwEnginesSupported = WIN_SERVER_SHADOW_GDI;
+
+#ifdef XWIN_NATIVEGDI
+  g_dwEnginesSupported |= WIN_SERVER_NATIVE_GDI;
+#endif
+
+  /* Get operating system version information */
+  ZeroMemory (&osvi, sizeof (osvi));
+  osvi.dwOSVersionInfoSize = sizeof (osvi);
+  GetVersionEx (&osvi);
+
+  /* Branch on platform ID */
+  switch (osvi.dwPlatformId)
+    {
+    case VER_PLATFORM_WIN32_NT:
+      /* Engine 4 is supported on NT only */
+      winErrorFVerb (2, "winDetectSupportedEngines - Windows NT/2000/XP\n");
+      break;
+
+    case VER_PLATFORM_WIN32_WINDOWS:
+      /* Engine 4 is supported on NT only */
+      winErrorFVerb (2, "winDetectSupportedEngines - Windows 95/98/Me\n");
+      break;
+    }
+
+  /* Do we have DirectDraw? */
+  if (g_hmodDirectDraw != NULL)
+    {
+      LPDIRECTDRAW	lpdd = NULL;
+      LPDIRECTDRAW4	lpdd4 = NULL;
+      HRESULT		ddrval;
+
+      /* Was the DirectDrawCreate function found? */
+      if (g_fpDirectDrawCreate == NULL)
+	{
+	  /* No DirectDraw support */
+	  return;
+	}
+
+      /* DirectDrawCreate exists, try to call it */
+      /* Create a DirectDraw object, store the address at lpdd */
+      ddrval = (*g_fpDirectDrawCreate) (NULL,
+					(void**) &lpdd,
+					NULL);
+      if (FAILED (ddrval))
+	{
+	  /* No DirectDraw support */
+	  winErrorFVerb (2, "winDetectSupportedEngines - DirectDraw not installed\n");
+	  return;
+	}
+      else
+	{
+	  /* We have DirectDraw */
+	  winErrorFVerb (2, "winDetectSupportedEngines - DirectDraw installed\n");
+	  g_dwEnginesSupported |= WIN_SERVER_SHADOW_DD;
+
+#ifdef XWIN_PRIMARYFB
+	  /* Allow PrimaryDD engine if NT */
+	  if (osvi.dwPlatformId == VER_PLATFORM_WIN32_NT)
+	    {
+	      g_dwEnginesSupported |= WIN_SERVER_PRIMARY_DD;
+	      winErrorFVerb (2, "winDetectSupportedEngines - Allowing PrimaryDD\n");
+	    }
+#endif
+	}
+      
+      /* Try to query for DirectDraw4 interface */
+      ddrval = IDirectDraw_QueryInterface (lpdd,
+					   &IID_IDirectDraw4,
+					   (LPVOID*) &lpdd4);
+      if (SUCCEEDED (ddrval))
+	{
+	  /* We have DirectDraw4 */
+	  winErrorFVerb (2, "winDetectSupportedEngines - DirectDraw4 installed\n");
+	  g_dwEnginesSupported |= WIN_SERVER_SHADOW_DDNL;
+	}
+
+      /* Cleanup DirectDraw interfaces */
+      if (lpdd4 != NULL)
+	IDirectDraw_Release (lpdd4);
+      if (lpdd != NULL)
+	IDirectDraw_Release (lpdd);
+    }
+
+  winErrorFVerb (2, "winDetectSupportedEngines - Returning, supported engines %08x\n",
+	  (unsigned int) g_dwEnginesSupported);
+}
+
+
+/*
+ * Set the engine type, depending on the engines
+ * supported for this screen, and whether the user
+ * suggested an engine type
+ */
+
+Bool
+winSetEngine (ScreenPtr pScreen)
+{
+  winScreenPriv(pScreen);
+  winScreenInfo		*pScreenInfo = pScreenPriv->pScreenInfo;
+  HDC			hdc;
+  DWORD			dwBPP;
+
+  /* Get a DC */
+  hdc = GetDC (NULL);
+  if (hdc == NULL)
+    {
+      ErrorF ("winSetEngine - Couldn't get an HDC\n");
+      return FALSE;
+    }
+
+  /*
+   * pScreenInfo->dwBPP may be 0 to indicate that the current screen
+   * depth is to be used.  Thus, we must query for the current display
+   * depth here.
+   */
+  dwBPP = GetDeviceCaps (hdc, BITSPIXEL);
+
+  /* Release the DC */
+  ReleaseDC (NULL, hdc);
+  hdc = NULL;
+
+  /* ShadowGDI is the only engine that supports windowed PseudoColor */
+  if (dwBPP == 8 && !pScreenInfo->fFullScreen)
+    {
+      winErrorFVerb (2, "winSetEngine - Windowed && PseudoColor => ShadowGDI\n");
+      pScreenInfo->dwEngine = WIN_SERVER_SHADOW_GDI;
+
+      /* Set engine function pointers */
+      winSetEngineFunctionsShadowGDI (pScreen);
+      return TRUE;
+    }
+
+  /* ShadowGDI is the only engine that supports Multi Window Mode */
+  if (
+#ifdef XWIN_MULTIWINDOWEXTWM
+      pScreenInfo->fMWExtWM
+#else
+      FALSE
+#endif
+#ifdef XWIN_MULTIWINDOW
+      || pScreenInfo->fMultiWindow
+#else
+      || FALSE
+#endif
+      )
+    {
+      winErrorFVerb (2, "winSetEngine - Multi Window or Rootless => ShadowGDI\n");
+      pScreenInfo->dwEngine = WIN_SERVER_SHADOW_GDI;
+
+      /* Set engine function pointers */
+      winSetEngineFunctionsShadowGDI (pScreen);
+      return TRUE;
+    }
+
+  /* If the user's choice is supported, we'll use that */
+  if (g_dwEnginesSupported & pScreenInfo->dwEnginePreferred)
+    {
+      winErrorFVerb (2, "winSetEngine - Using user's preference: %d\n",
+	      (int) pScreenInfo->dwEnginePreferred);
+      pScreenInfo->dwEngine = pScreenInfo->dwEnginePreferred;
+
+      /* Setup engine function pointers */
+      switch (pScreenInfo->dwEngine)
+	{
+	case WIN_SERVER_SHADOW_GDI:
+	  winSetEngineFunctionsShadowGDI (pScreen);
+	  break;
+	case WIN_SERVER_SHADOW_DD:
+	  winSetEngineFunctionsShadowDD (pScreen);
+	  break;
+	case WIN_SERVER_SHADOW_DDNL:
+	  winSetEngineFunctionsShadowDDNL (pScreen);
+	  break;
+#ifdef XWIN_PRIMARYFB
+	case WIN_SERVER_PRIMARY_DD:
+	  winSetEngineFunctionsPrimaryDD (pScreen);
+	  break;
+#endif
+#ifdef XWIN_NATIVEGDI
+	case WIN_SERVER_NATIVE_GDI:
+	  winSetEngineFunctionsNativeGDI (pScreen);
+	  break;
+#endif
+	default:
+	  FatalError ("winSetEngine - Invalid engine type\n");
+	}
+      return TRUE;
+    }
+
+  /* ShadowDDNL has good performance, so why not */
+  if (g_dwEnginesSupported & WIN_SERVER_SHADOW_DDNL)
+    {
+      winErrorFVerb (2, "winSetEngine - Using Shadow DirectDraw NonLocking\n");
+      pScreenInfo->dwEngine = WIN_SERVER_SHADOW_DDNL;
+
+      /* Set engine function pointers */
+      winSetEngineFunctionsShadowDDNL (pScreen);
+      return TRUE;
+    }
+
+  /* ShadowDD is next in line */
+  if (g_dwEnginesSupported & WIN_SERVER_SHADOW_DD)
+    {
+      winErrorFVerb (2, "winSetEngine - Using Shadow DirectDraw\n");
+      pScreenInfo->dwEngine = WIN_SERVER_SHADOW_DD;
+
+      /* Set engine function pointers */
+      winSetEngineFunctionsShadowDD (pScreen);
+      return TRUE;
+    }
+
+  /* ShadowGDI is next in line */
+  if (g_dwEnginesSupported & WIN_SERVER_SHADOW_GDI)
+    {
+      winErrorFVerb (2, "winSetEngine - Using Shadow GDI DIB\n");
+      pScreenInfo->dwEngine = WIN_SERVER_SHADOW_GDI;
+
+      /* Set engine function pointers */
+      winSetEngineFunctionsShadowGDI (pScreen);
+      return TRUE;
+    }
+
+  return TRUE;
+}
+
+
+/*
+ * Get procedure addresses for DirectDrawCreate and DirectDrawCreateClipper
+ */
+
+Bool
+winGetDDProcAddresses (void)
+{
+  Bool			fReturn = TRUE;
+  
+  /* Load the DirectDraw library */
+  g_hmodDirectDraw = LoadLibraryEx ("ddraw.dll", NULL, 0);
+  if (g_hmodDirectDraw == NULL)
+    {
+      ErrorF ("winGetDDProcAddresses - Could not load ddraw.dll\n");
+      fReturn = TRUE;
+      goto winGetDDProcAddresses_Exit;
+    }
+
+  /* Try to get the DirectDrawCreate address */
+  g_fpDirectDrawCreate = GetProcAddress (g_hmodDirectDraw,
+					 "DirectDrawCreate");
+  if (g_fpDirectDrawCreate == NULL)
+    {
+      ErrorF ("winGetDDProcAddresses - Could not get DirectDrawCreate "
+	      "address\n");
+      fReturn = TRUE;
+      goto winGetDDProcAddresses_Exit;
+    }
+
+  /* Try to get the DirectDrawCreateClipper address */
+  g_fpDirectDrawCreateClipper = GetProcAddress (g_hmodDirectDraw,
+						"DirectDrawCreateClipper");
+  if (g_fpDirectDrawCreateClipper == NULL)
+    {
+      ErrorF ("winGetDDProcAddresses - Could not get "
+	      "DirectDrawCreateClipper address\n");
+      fReturn = FALSE;
+      goto winGetDDProcAddresses_Exit;
+    }
+
+  /*
+   * Note: Do not unload ddraw.dll here.  Do it in GiveUp
+   */
+
+ winGetDDProcAddresses_Exit:
+  /* Unload the DirectDraw library if we failed to initialize */
+  if (!fReturn && g_hmodDirectDraw != NULL)
+    {
+      FreeLibrary (g_hmodDirectDraw);
+      g_hmodDirectDraw = NULL;
+    }
+  
+  return fReturn;
+}
+
+void
+winReleaseDDProcAddresses(void)
+{
+  if (g_hmodDirectDraw != NULL)
+    {
+      FreeLibrary (g_hmodDirectDraw);
+      g_hmodDirectDraw = NULL;
+      g_fpDirectDrawCreate = NULL;
+      g_fpDirectDrawCreateClipper = NULL;
+    }
+}