win32ss/reactx/dxg/eng.c

   1 /*
   2  * COPYRIGHT:        See COPYING in the top level directory
   3  * PROJECT:          ReactOS kernel
   4  * PURPOSE:          Native driver for dxg implementation
   5  * FILE:             drivers/directx/dxg/main.c
   6  * PROGRAMER:        Magnus olsen (magnus@greatlord.com)
   7  * REVISION HISTORY:
   8  *       30/12-2007   Magnus Olsen
   9  */
  10
  11 #include <dxg_int.h>
  12
  13 PDD_SURFACE_LOCAL
  14 NTAPI
  15 DxDdLockDirectDrawSurface(HANDLE hDdSurface)
  16 {
  17    PEDD_SURFACE pEDDSurface = NULL;
  18    PDD_SURFACE_LOCAL pSurfacelcl = NULL;
  19
  20    pEDDSurface = DdHmgLock(hDdSurface, ObjType_DDSURFACE_TYPE, FALSE);
  21    if (pEDDSurface != NULL)
  22    {
  23         pSurfacelcl = &pEDDSurface->ddsSurfaceLocal;
  24    }
  25
  26    return pSurfacelcl;
  27 }
  28
  29 BOOL
  30 NTAPI
  31 DxDdUnlockDirectDrawSurface(PDD_SURFACE_LOCAL pSurface)
  32 {
  33     BOOL retVal = FALSE;
  34     //PEDD_SURFACE pEDDSurface  = NULL;
  35
  36     if (pSurface)
  37     {
  38         // pEDDSurface = (PEDD_SURFACE)( ((PBYTE)pSurface) - sizeof(DD_BASEOBJECT));
  39         // InterlockedDecrement(&pEDDSurface->pobj.cExclusiveLock);
  40         retVal = TRUE;
  41     }
  42
  43     return retVal;
  44 }