/***  $Id: win_fb.c,v 1.3 2005/06/08 02:36:27 weiym Exp $**  **  win_fb.c: A subdriver of shadow NEWGAL engine for Windows WVFB 4bpp/1bpp.****  Copyring (C) 2003 ~ 2005 Feynman Software.*//*** 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA*/#include <stdio.h>#include <stdlib.h>#include "mgconfig.h"#if defined (_NEWGAL_ENGINE_SHADOW) && defined (WIN32) && defined (__TARGET_WVFB__)#include "windows.h"static HANDLE hMutex;static HANDLE hScreen;static LPVOID lpScreen;int wvfb_shadow_available (void){	hMutex = OpenMutex (MUTEX_MODIFY_STATE, FALSE, "WVFBScreenObject");	if (hMutex == 0 || hMutex == (HANDLE)ERROR_FILE_NOT_FOUND) {	    fprintf (stderr, "WVFB is not available!\n");		return 0;	}	return 1;}void *wvfb_shadow_init (){	hScreen = OpenFileMapping (FILE_MAP_ALL_ACCESS, FALSE, "WVFBScreenMap");	if (hScreen == NULL) {	    fprintf (stderr, "Could not open file mapping object WVFBScreenMap.");		return NULL;	}	lpScreen = MapViewOfFile (hScreen, FILE_MAP_ALL_ACCESS, 0, 0, 0);	if (lpScreen == NULL) {	    fprintf (stderr, "Could not map view of file.");		return NULL;	}	return (void *)lpScreen;}void wvfb_shadow_close (void){	UnmapViewOfFile (lpScreen);	CloseHandle (hScreen);	CloseHandle (hMutex);}void wvfb_shadow_lock (void){	WaitForSingleObject (hMutex, INFINITE);}void wvfb_shadow_unlock (void){	ReleaseMutex (hMutex);}#endif /* _NEWGAL_ENGINE_SHADOW && WIN32 && __TARGET_WVFB__ */