dc.c

这是一个开放源代码的与WINNT/WIN2K/WIN2003兼容的操作系统

/*
 *  ReactOS kernel
 *  Copyright (C) 1998, 1999, 2000, 2001 ReactOS Team
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */
/* $Id: dc.c 26568 2007-04-28 23:46:30Z jimtabor $
 *
 * PROJECT:         ReactOS user32.dll
 * FILE:            lib/user32/windows/input.c
 * PURPOSE:         Input
 * PROGRAMMER:      Casper S. Hornstrup ([e-mail])
 * UPDATE HISTORY:
 *      09-05-2001  CSH  Created
 */

/* INCLUDES ******************************************************************/

#include <user32.h>

#include <wine/debug.h>

/* FUNCTIONS *****************************************************************/

/*
 * @implemented
 */
HDC
STDCALL
GetDC(
  HWND hWnd)
{
  return NtUserGetDC(hWnd);
}


/*
 * @implemented
 */
HDC
STDCALL
GetDCEx(
  HWND hWnd,
  HRGN hrgnClip,
  DWORD flags)
{
  return NtUserGetDCEx(hWnd, hrgnClip, flags);
}


/*
 * @implemented
 */
HDC
STDCALL
GetWindowDC(
  HWND hWnd)
{
  return (HDC)NtUserGetWindowDC(hWnd);
}


BOOL STDCALL GdiReleaseDC(HDC hdc);

/*
 * @implemented
 */
int
STDCALL
ReleaseDC(
  HWND hWnd,
  HDC hDC)
{
  // From msdn: if the DC was not released return zero.
  //            if the DC was released return one.

  if (!hDC) return FALSE; // Null hDC return zero.

  GdiReleaseDC ( hDC ); // Release locals.
  // Win 3.1 throw back, hWnd should be ignored and not used.  
  // Replace with NtUserCallOneParam ((DWORD) hDC, ONEPARAM_ROUTINE_RELEASEDC);
  return NtUserReleaseDC(hWnd, hDC);
}


/*
 * @implemented
 */
HWND
STDCALL
WindowFromDC(
  HDC hDC)
{
  return NtUserWindowFromDC(hDC);
}