[greatlrd] 31469: documented : EngLockDirectDrawSurface small optimize of EngLockDirectDrawSurface, EngDxIoctl,

Author: greatlrd
Date: Thu Dec 27 22:24:22 2007
New Revision: 31469

URL: http://svn.reactos.org/svn/reactos?rev=31469&view=rev
Log:
documented : EngLockDirectDrawSurface
small optimize of EngLockDirectDrawSurface, EngDxIoctl,

Modified:
    trunk/reactos/subsystems/win32/win32k/ntddraw/eng.c

Modified: trunk/reactos/subsystems/win32/win32k/ntddraw/eng.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/subsystems/win32/win32k/ntd...
==============================================================================
--- trunk/reactos/subsystems/win32/win32k/ntddraw/eng.c (original)
+++ trunk/reactos/subsystems/win32/win32k/ntddraw/eng.c Thu Dec 27 22:24:22 2007
@@ -143,37 +143,49 @@
            ULONG ulBufferSize)
 {
     PGD_ENGDXIOCTL pfnEngDxIoctl = (PGD_ENGDXIOCTL)gpDxFuncs[DXG_INDEX_DxDdIoctl].pfn;
-
-    if (pfnEngDxIoctl == NULL)
-    {
-        DPRINT1("Warring no pfnEngDxIoctl");
-        return DDERR_UNSUPPORTED;
-    }
+    DWORD retVal = DDERR_UNSUPPORTED;

DPRINT1("Calling on dxg.sys pfnEngDxIoctl");
-    return pfnEngDxIoctl(ulIoctl, pBuffer, ulBufferSize);
-}
-
-/************************************************************************/
-/* EngLockDirectDrawSurface                                             */
-/************************************************************************/
+
+    if (pfnEngDxIoctl != NULL)
+    {
+        retVal = pfnEngDxIoctl(ulIoctl, pBuffer, ulBufferSize);
+    }
+
+    return retVal;
+}
+
+/*++
+* @name EngLockDirectDrawSurface
+* @implemented
+*
+* The function EngUnlockDirectDrawSurface locking the dx surface
+
+* @param HANDLE hSurface
+* The handle of a surface
+*
+* @return
+* This return vaild or NULL pointer to PDD_SURFACE_LOCAL object
+*
+* @remarks.
+* None
+*
+*--*/
 PDD_SURFACE_LOCAL
 STDCALL
 EngLockDirectDrawSurface(HANDLE hSurface)
 {
-    PGD_ENGLOCKDIRECTDRAWSURFACE pfnEngLockDirectDrawSurface = NULL;
-    INT i;
-
-    DXG_GET_INDEX_FUNCTION(DXG_INDEX_DxDdLockDirectDrawSurface, pfnEngLockDirectDrawSurface);
-
-    if (pfnEngLockDirectDrawSurface == NULL)
-    {
-        DPRINT1("Warring no pfnEngLockDirectDrawSurface");
-        return DDHAL_DRIVER_NOTHANDLED;
-    }
+    PGD_ENGLOCKDIRECTDRAWSURFACE pfnEngLockDirectDrawSurface = (PGD_ENGLOCKDIRECTDRAWSURFACE)gpDxFuncs[DXG_INDEX_DxDdLockDirectDrawSurface].pfn;
+    PDD_SURFACE_LOCAL retVal = NULL;

DPRINT1("Calling on dxg.sys pfnEngLockDirectDrawSurface");
-    return pfnEngLockDirectDrawSurface(hSurface);
+
+    if (pfnEngLockDirectDrawSurface != NULL)
+    {
+       retVal = pfnEngLockDirectDrawSurface(hSurface);
+    }
+
+    return retVal;
 }