C++ refexport_t类代码示例

/*
==============
VID_LoadRefresh
==============
*/
qboolean VID_LoadRefresh( char *name )
{
	refimport_t	ri;
#ifndef REF_HARD_LINKED	
	GetRefAPI_t	GetRefAPI;
#endif	
	char	fn[MAX_OSPATH];
	struct stat st;
	extern uid_t saved_euid;
	FILE *fp;
	
	if ( reflib_active )
	{
		if (KBD_Close_fp)
			KBD_Close_fp();
		if (RW_IN_Shutdown_fp)
			RW_IN_Shutdown_fp();
		KBD_Close_fp = NULL;
		RW_IN_Shutdown_fp = NULL;
		re.Shutdown();
		VID_FreeReflib ();
	}
	
#ifndef REF_HARD_LINKED
	// Vladimir
	// load config
	char so_file [MAX_QPATH];	// Conf: /{fs_basedir}/{gamedir}/quake2.conf
	
	Com_sprintf(so_file, sizeof(so_file), "%s/quake2.conf", FS_Gamedir() ); 
		
	Sys_Printf( "------- Loading %s (%s) -------\n", name, so_file );

	//regain root
	seteuid(saved_euid);

	// read config
	if ((fp = fopen(so_file, "r")) == NULL) {
		Com_Printf( "LoadLibrary(\"%s\") failed: can't open %s (required for location of ref libraries)\n", name, so_file);
		return false;
	}
	fgets(fn, sizeof(fn), fp);
	fclose(fp);
	while (*fn && isspace(fn[strlen(fn) - 1]))
		fn[strlen(fn) - 1] = 0;

	// Vladimir Append /lib
	strcat(fn, "/lib"); 
	strcat(fn, name);

	// permission checking
	if (strstr(fn, "softx") == NULL) { // softx doesn't require root
		if (stat(fn, &st) == -1) {
			Com_Printf( "LoadLibrary(\"%s\" - %s) failed: %s\n", name, fn, strerror(errno));
			return false;
		}
	} else {
		// softx requires we give up root now
		setreuid(getuid(), getuid());
		setegid(getgid());
	}

	if ( ( reflib_library = dlopen( fn, RTLD_LAZY | RTLD_GLOBAL ) ) == 0 )
	{
		Com_Printf( "LoadLibrary(\"%s\", %s) failed: %s\n", name , fn, dlerror());
		return false;
	}

    Sys_Printf( "LoadLibrary(\"%s\")\n", fn );
	
#endif

	ri.Cmd_AddCommand = Cmd_AddCommand;
	ri.Cmd_RemoveCommand = Cmd_RemoveCommand;
	ri.Cmd_Argc = Cmd_Argc;
	ri.Cmd_Argv = Cmd_Argv;
	ri.Cmd_ExecuteText = Cbuf_ExecuteText;
	ri.Con_Printf = VID_Printf;
	ri.Sys_Error = VID_Error;
	ri.FS_LoadFile = FS_LoadFile;
	ri.FS_FreeFile = FS_FreeFile;
	ri.FS_Gamedir = FS_Gamedir;
	ri.Cvar_Get = Cvar_Get;
	ri.Cvar_Set = Cvar_Set;
	ri.Cvar_SetValue = Cvar_SetValue;
	ri.Vid_GetModeInfo = VID_GetModeInfo;
	ri.Vid_MenuInit = VID_MenuInit;
	ri.Vid_NewWindow = VID_NewWindow;

	ri.Vid_SwapBuffers = VID_SwapBuffers; // Vladimir JNI swap buffers
	
#ifndef REF_HARD_LINKED	
	if ( ( GetRefAPI = (void *) dlsym( reflib_library, "GetRefAPI" ) ) == 0 )
		Com_Error( ERR_FATAL, "dlsym failed on %s", name );
#endif

//.........这里部分代码省略.........

void	VID_Shutdown (void)
{
    if (re.Shutdown)
	    re.Shutdown ();
}

/*
==============
VID_LoadRefresh
==============
*/
qboolean VID_LoadRefresh( char *name )
{
	refimport_t	ri;
	GetRefAPI_t	GetRefAPI;
	
	if ( reflib_active )
	{
		re.Shutdown();
		VID_FreeReflib ();
	}

	Com_Printf( "------- Loading %s -------\n", name );

	if ( ( reflib_library = LoadLibrary( name ) ) == 0 )
	{
		Com_Printf( "LoadLibrary(\"%s\") failed\n", name );

		return false;
	}

	ri.Cmd_AddCommand = Cmd_AddCommand;
	ri.Cmd_RemoveCommand = Cmd_RemoveCommand;
	ri.Cmd_Argc = Cmd_Argc;
	ri.Cmd_Argv = Cmd_Argv;
	ri.Cmd_ExecuteText = Cbuf_ExecuteText;
	ri.Con_Printf = VID_Printf;
	ri.Sys_Error = VID_Error;
	ri.FS_LoadFile = FS_LoadFile;
	ri.FS_FreeFile = FS_FreeFile;
	ri.FS_Gamedir = FS_Gamedir;
	ri.Cvar_Get = Cvar_Get;
	ri.Cvar_Set = Cvar_Set;
	ri.Cvar_SetValue = Cvar_SetValue;
	ri.Vid_GetModeInfo = VID_GetModeInfo;
	ri.Vid_MenuInit = VID_MenuInit;
	ri.Vid_NewWindow = VID_NewWindow;

	if ( ( GetRefAPI = (void *) GetProcAddress( reflib_library, "GetRefAPI" ) ) == 0 )
		Com_Error( ERR_FATAL, "GetProcAddress failed on %s", name );

	re = GetRefAPI( ri );

	if (re.api_version != API_VERSION)
	{
		VID_FreeReflib ();
		Com_Error (ERR_FATAL, "%s has incompatible api_version", name);
	}

	if ( re.Init( global_hInstance, MainWndProc ) == -1 )
	{
		re.Shutdown();
		VID_FreeReflib ();
		return false;
	}

	Com_Printf( "------------------------------------\n");
	reflib_active = true;

//======
//PGM
	vidref_val = VIDREF_OTHER;
	if(vid_ref)
	{
		if(!strcmp (vid_ref->string, "gl"))
			vidref_val = VIDREF_GL;
		else if(!strcmp(vid_ref->string, "soft"))
			vidref_val = VIDREF_SOFT;
	}
//PGM
//======

	return true;
}

void Com_Frame( void ) {
	try 
	{
		int		timeBeforeFirstEvents = 0, timeBeforeServer = 0, timeBeforeEvents = 0, timeBeforeClient = 0, timeAfter = 0;
		int		msec, minMsec;
		static int	lastTime = 0;

		// write config file if anything changed
		Com_WriteConfiguration(); 

		// if "viewlog" has been modified, show or hide the log console
		if ( com_viewlog->modified ) {
			Sys_ShowConsole( com_viewlog->integer, qfalse );
			com_viewlog->modified = qfalse;
		}

		//
		// main event loop
		//
		if ( com_speeds->integer ) {
			timeBeforeFirstEvents = Sys_Milliseconds ();
		}

		// we may want to spin here if things are going too fast
		if ( com_maxfps->integer > 0 ) {
			minMsec = 1000 / com_maxfps->integer;
		} else {
			minMsec = 1;
		}
		do {
			com_frameTime = Com_EventLoop();
			if ( lastTime > com_frameTime ) {
				lastTime = com_frameTime;		// possible on first frame
			}
			msec = com_frameTime - lastTime;
		} while ( msec < minMsec );
		Cbuf_Execute ();

		lastTime = com_frameTime;

		// mess with msec if needed
		com_frameMsec = msec;
		float fractionMsec=0.0f;
		msec = Com_ModifyMsec( msec, fractionMsec);
	
		//
		// server side
		//
		if ( com_speeds->integer ) {
			timeBeforeServer = Sys_Milliseconds ();
		}

		SV_Frame (msec, fractionMsec);


		//
		// client system
		//


	//	if ( !com_dedicated->integer ) 
		{
			//
			// run event loop a second time to get server to client packets
			// without a frame of latency
			//
			if ( com_speeds->integer ) {
				timeBeforeEvents = Sys_Milliseconds ();
			}
			Com_EventLoop();
			Cbuf_Execute ();


			//
			// client side
			//
			if ( com_speeds->integer ) {
				timeBeforeClient = Sys_Milliseconds ();
			}

			CL_Frame (msec, fractionMsec);

			if ( com_speeds->integer ) {
				timeAfter = Sys_Milliseconds ();
			}
		}


		//
		// report timing information
		//
		if ( com_speeds->integer ) {
			int			all, sv, ev, cl;

			all = timeAfter - timeBeforeServer;
			sv = timeBeforeEvents - timeBeforeServer;
			ev = timeBeforeServer - timeBeforeFirstEvents + timeBeforeClient - timeBeforeEvents;
			cl = timeAfter - timeBeforeClient;
			sv -= time_game;
			cl -= time_frontend + time_backend;
//.........这里部分代码省略.........

/*
==============
VID_LoadRefresh
==============
*/
qboolean VID_LoadRefresh( char *name )
{
	refimport_t	ri;
	GetRefAPI_t	GetRefAPI;
	char	fn[MAX_OSPATH];
	struct stat st;
	extern uid_t saved_euid;
	FILE *fp;
	
	if ( reflib_active )
	{
		if (KBD_Close_fp)
			KBD_Close_fp();
		if (RW_IN_Shutdown_fp)
			RW_IN_Shutdown_fp();
		KBD_Close_fp = NULL;
		RW_IN_Shutdown_fp = NULL;
		re.Shutdown();
		VID_FreeReflib ();
	}

	Com_Printf( "------- Loading %s -------\n", name );

	//regain root
	seteuid(saved_euid);

	if ((fp = fopen(so_file, "r")) == NULL) {
		Com_Printf( "LoadLibrary(\"%s\") failed: can't open %s (required for location of ref libraries)\n", name, so_file);
		return false;
	}
	fgets(fn, sizeof(fn), fp);
	fclose(fp);
	while (*fn && isspace(fn[strlen(fn) - 1]))
		fn[strlen(fn) - 1] = 0;

	strcat(fn, "/");
	strcat(fn, name);

	// permission checking
	if (strstr(fn, "softx") == NULL) { // softx doesn't require root
		if (stat(fn, &st) == -1) {
			Com_Printf( "LoadLibrary(\"%s\") failed: %s\n", name, strerror(errno));
			return false;
		}
#if 0
		if (st.st_uid != 0) {
			Com_Printf( "LoadLibrary(\"%s\") failed: ref is not owned by root\n", name);
			return false;
		}
		if ((st.st_mode & 0777) & ~0700) {
			Com_Printf( "LoadLibrary(\"%s\") failed: invalid permissions, must be 700 for security considerations\n", name);
			return false;
		}
#endif
	} else {
		// softx requires we give up root now
		setreuid(getuid(), getuid());
		setegid(getgid());
	}

	if ( ( reflib_library = dlopen( fn, RTLD_LAZY | RTLD_GLOBAL ) ) == 0 )
	{
		Com_Printf( "LoadLibrary(\"%s\") failed: %s\n", name , dlerror());
		return false;
	}

  Com_Printf( "LoadLibrary(\"%s\")\n", fn );

	ri.Cmd_AddCommand = Cmd_AddCommand;
	ri.Cmd_RemoveCommand = Cmd_RemoveCommand;
	ri.Cmd_Argc = Cmd_Argc;
	ri.Cmd_Argv = Cmd_Argv;
	ri.Cmd_ExecuteText = Cbuf_ExecuteText;
	ri.Con_Printf = VID_Printf;
	ri.Sys_Error = VID_Error;
	ri.FS_LoadFile = FS_LoadFile;
	ri.FS_FreeFile = FS_FreeFile;
	ri.FS_Gamedir = FS_Gamedir;
	ri.Cvar_Get = Cvar_Get;
	ri.Cvar_Set = Cvar_Set;
	ri.Cvar_SetValue = Cvar_SetValue;
	ri.Vid_GetModeInfo = VID_GetModeInfo;
	ri.Vid_MenuInit = VID_MenuInit;
	ri.Vid_NewWindow = VID_NewWindow;

	if ( ( GetRefAPI = (void *) dlsym( reflib_library, "GetRefAPI" ) ) == 0 )
		Com_Error( ERR_FATAL, "dlsym failed on %s", name );

	re = GetRefAPI( ri );

	if (re.api_version != API_VERSION)
	{
		VID_FreeReflib ();
		Com_Error (ERR_FATAL, "%s has incompatible api_version", name);
	}
//.........这里部分代码省略.........

/*
====================
MainWndProc

main window procedure
====================
*/
LONG WINAPI MainWndProc (
    HWND    hWnd,
    UINT    uMsg,
    WPARAM  wParam,
    LPARAM  lParam)
{
	LONG			lRet = 0;

	if ( uMsg == MSH_MOUSEWHEEL )
	{
		if ( ( ( int ) wParam ) > 0 )
		{
			Key_Event( K_MWHEELUP, true, sys_msg_time );
			Key_Event( K_MWHEELUP, false, sys_msg_time );
		}
		else
		{
			Key_Event( K_MWHEELDOWN, true, sys_msg_time );
			Key_Event( K_MWHEELDOWN, false, sys_msg_time );
		}
        return DefWindowProc (hWnd, uMsg, wParam, lParam);
	}

	switch (uMsg)
	{
	case WM_MOUSEWHEEL:
		/*
		** this chunk of code theoretically only works under NT4 and Win98
		** since this message doesn't exist under Win95
		*/
		if ( ( short ) HIWORD( wParam ) > 0 )
		{
			Key_Event( K_MWHEELUP, true, sys_msg_time );
			Key_Event( K_MWHEELUP, false, sys_msg_time );
		}
		else
		{
			Key_Event( K_MWHEELDOWN, true, sys_msg_time );
			Key_Event( K_MWHEELDOWN, false, sys_msg_time );
		}
		break;

	case WM_HOTKEY:
		return 0;

	case WM_CREATE:
		cl_hwnd = hWnd;

		MSH_MOUSEWHEEL = RegisterWindowMessage("MSWHEEL_ROLLMSG"); 
        return DefWindowProc (hWnd, uMsg, wParam, lParam);

	case WM_PAINT:
		SCR_DirtyScreen ();	// force entire screen to update next frame
        return DefWindowProc (hWnd, uMsg, wParam, lParam);

	case WM_DESTROY:
		// let sound and input know about this?
		cl_hwnd = NULL;
        return DefWindowProc (hWnd, uMsg, wParam, lParam);

	case WM_ACTIVATE:
		{
			int	fActive, fMinimized;

			// KJB: Watch this for problems in fullscreen modes with Alt-tabbing.
			fActive = LOWORD(wParam);
			fMinimized = (BOOL) HIWORD(wParam);

			AppActivate( fActive != WA_INACTIVE, fMinimized);

			if ( reflib_active )
				re.AppActivate( !( fActive == WA_INACTIVE ) );
		}
        return DefWindowProc (hWnd, uMsg, wParam, lParam);

	case WM_MOVE:
		{
			int		xPos, yPos;
			RECT r;
			int		style;

			if (!vid_fullscreen->value)
			{
				xPos = (short) LOWORD(lParam);    // horizontal position 
				yPos = (short) HIWORD(lParam);    // vertical position 

				r.left   = 0;
				r.top    = 0;
				r.right  = 1;
				r.bottom = 1;

				style = GetWindowLong( hWnd, GWL_STYLE );
				AdjustWindowRect( &r, style, FALSE );
//.........这里部分代码省略.........

//RAZFIXME: BAD BAD, maybe? had to move it out of ghoul2_shared.h -> CGhoul2Info_v at the least..
IGhoul2InfoArray &_TheGhoul2InfoArray( void ) {
	return re.TheGhoul2InfoArray();
}

void Menu_Draw ( menuframework_t *menu )
{
	char scratch[MAX_QPATH];
	static int yaw;
//	int maxframe = 29;
	entity_t entity;
	int i;
	menucommon_t *item;
	refdef_t refdef;

	// Draw rotating Quake II Symbol
	memset( &refdef, 0, sizeof( refdef ) );
	memset( &entity, 0, sizeof( entity ) );

	refdef.x = 0;
	refdef.y = 0;
	refdef.width = viddef.width;
	refdef.height = viddef.height;
	refdef.fov_x = 35;
	refdef.fov_y = CalcFov( refdef.fov_x, refdef.width, refdef.height );
	refdef.time = cls.realtime * 0.001;
	refdef.areabits = NULL;
	refdef.num_entities = 1;
	//refdef.lightstyles = 5;			// Gentle Pulse
	refdef.lightstyles = 63;			// Testing (FULLBRIGHT)
	refdef.rdflags = RDF_NOWORLDMODEL;
	refdef.blend[0] = 1.0;
	refdef.blend[1] = 1.0;
	refdef.blend[2] = 1.0;
	refdef.blend[3] = 0.0;
	refdef.dlights = NULL;
	refdef.num_dlights = 0;
	refdef.num_particles = 0;
	refdef.particles = NULL;
	VectorSet(refdef.viewangles, 1.0, 0.0, 0.0);
	VectorClear(refdef.vieworg);

	//if (!strcmp(vid_ref->string, "soft"))
	//	Com_sprintf( scratch, sizeof( scratch ), "models/items/quaddama/tris.md2");
	//else
		Com_sprintf( scratch, sizeof( scratch ), "models/MenuModel/quad.md2");

	entity.model = re.RegisterModel( scratch );
	//entity.Model_Type = 0;
	entity.flags = RF_MINLIGHT | RF_DEPTHHACK | RF_FULLBRIGHT | RF_GLOW | RF_NOSHADOW;
	entity.origin[0] = 80;
	entity.origin[1] = 0;
	entity.origin[2] = -18;	// -18 compensates for the float height of the model
	VectorCopy( entity.origin, entity.oldorigin );
	entity.frame = 0;
	entity.oldframe = 0;
	entity.backlerp = 0.0;
	entity.angles[1] = yaw++;
	if ( ++yaw > 360 )
		yaw -= 360;

	refdef.entities = &entity;

	// Fog the scene
	//refdef.blend[0] = 0.55;
	//refdef.blend[1] = 0.55;
	//refdef.blend[2] = 0.55;
	//refdef.blend[3] = 0.55;

	if (cl_3dmenubg->value)
	{
		// Draw scene
		MenuRefdefActive = 1;
		re.RenderFrame( &refdef );
		//Menu_DrawBackground("q2bg.tga");
	}

	// Draw the menu version information
	if (cl_menustamp->value > 0)
	{
		/*
		1 - Regular string
		2 - Regular string plus drop shadow (green... not effective)
		3 - All green string
		*/
		if (cl_menustamp->value == 1)
		{
			// Draw the text
			Menu_DrawString (viddef.width - (strlen(MENUSTAMP) * FONTSIZE) - (FONTSIZE * 3), viddef.height - FONTSIZE, MENUSTAMP);
		}
		else if (cl_menustamp->value == 2)
		{
			// Draw the drop shadow (we need black characters)
			DrawAltString (viddef.width - (strlen(MENUSTAMP) * FONTSIZE) - (FONTSIZE * 3) - 1, viddef.height - FONTSIZE, MENUSTAMP);

			// Draw the text
			Menu_DrawString (viddef.width - (strlen(MENUSTAMP) * FONTSIZE) - (FONTSIZE * 3), viddef.height - FONTSIZE - 1, MENUSTAMP);
		}
		else if (cl_menustamp->value == 3)
		{
			// Draw the text
			DrawAltString (viddef.width - (strlen(MENUSTAMP) * FONTSIZE) - (FONTSIZE * 3), viddef.height - FONTSIZE, MENUSTAMP);
		}
	}

//.........这里部分代码省略.........

/*
============================
CL_StartHunkUsers

After the server has cleared the hunk, these will need to be restarted
This is the only place that any of these functions are called from
============================
*/
void CL_StartHunkUsers( void ) {
	if ( !com_cl_running->integer ) {
		return;
	}

	if ( !cls.rendererStarted ) {
#ifdef _XBOX
		//if ((!com_sv_running->integer || com_errorEntered) && !vidRestartReloadMap)
		//{
		//	// free up some memory
		//	extern void SV_ClearLastLevel(void);
		//	SV_ClearLastLevel();
		//}
#endif

		cls.rendererStarted = qtrue;
		re.BeginRegistration( &cls.glconfig );

		// load character sets
//		cls.charSetShader = re.RegisterShaderNoMip( "gfx/2d/bigchars" );
		cls.charSetShader = re.RegisterShaderNoMip( "gfx/2d/charsgrid_med" );
		cls.whiteShader = re.RegisterShader( "white" );
//		cls.consoleShader = re.RegisterShader( "console" );
		g_console_field_width = cls.glconfig.vidWidth / SMALLCHAR_WIDTH - 2;
		kg.g_consoleField.widthInChars = g_console_field_width;
#ifndef _IMMERSION
		//-------
		//	The latest Immersion Force Feedback system initializes here, not through
		//	win32 input system. Therefore, the window handle is valid :)
		//-------

		// now that the renderer has started up we know that the global hWnd is now valid,
		//	so we can now go ahead and (re)setup the input stuff that needs hWnds for DI...
		//  (especially Force feedback)...
		//
		static qboolean bOnceOnly = qfalse;	// only do once, not every renderer re-start
		if (!bOnceOnly)
		{
			bOnceOnly = qtrue;
			extern void Sys_In_Restart_f( void );
			Sys_In_Restart_f();
		}

#ifdef _XBOX
		if (vidRestartReloadMap)
		{
			int checksum;
			CM_LoadMap(va("maps/%s.bsp", cl_mapname->string), qfalse, &checksum);
			RE_LoadWorldMap(va("maps/%s.bsp", cl_mapname->string));
			vidRestartReloadMap = qfalse;
		}
#endif // _XBOX

#endif // _IMMERSION
	}

	if ( !cls.soundStarted ) {
		cls.soundStarted = qtrue;
		S_Init();
	}

	if ( !cls.soundRegistered ) {
		cls.soundRegistered = qtrue;
		S_BeginRegistration();
	}

#ifdef _IMMERSION
	if ( !cls.forceStarted ) {
		cls.forceStarted = qtrue;
		CL_InitFF();
	}
#endif // _IMMERSION

#if !defined (_XBOX)	//i guess xbox doesn't want the ui loaded all the time?
	//we require the ui to be loaded here or else it crashes trying to access the ui on command line map loads
	if ( !cls.uiStarted ) {
		cls.uiStarted = qtrue;
		CL_InitUI();
	}
#endif

//	if ( !cls.cgameStarted && cls.state > CA_CONNECTED && cls.state != CA_CINEMATIC ) {
	if ( !cls.cgameStarted && cls.state > CA_CONNECTED && (cls.state != CA_CINEMATIC && !CL_IsRunningInGameCinematic()) ) 
	{
		cls.cgameStarted = qtrue;
		CL_InitCGame();
	}
}

/*
==============
VID_LoadRefresh
==============
*/
qboolean VID_LoadRefresh( char *name )
{
	refimport_t	ri;
	GetRefAPI_t	GetRefAPI;
	char	fn[MAX_OSPATH];
	char	*path;
	struct stat st;
	extern uid_t saved_euid;
	
	if ( reflib_active )
	{
		if (KBD_Close_fp)
			KBD_Close_fp();
		if (RW_IN_Shutdown_fp)
			RW_IN_Shutdown_fp();
		KBD_Close_fp = NULL;
		RW_IN_Shutdown_fp = NULL;
		re.Shutdown();
		VID_FreeReflib ();
	}

	Com_Printf( "------- Loading %s -------\n", name );

	//regain root
	seteuid(saved_euid);

	path = Cvar_Get ("basedir", DEFAULT_BASEDIR, CVAR_NOSET)->string;

	snprintf (fn, MAX_OSPATH, "%s/%s", path, name );
	
	if (stat(fn, &st) == -1) {
		path = Cvar_Get ("libdir", DEFAULT_LIBDIR, CVAR_NOSET)->string;
		snprintf (fn, MAX_OSPATH, "%s/%s", path, name );
		if (stat(fn, &st) == -1) {
			Com_Printf( "LoadLibrary(\"%s\") failed: %s\n", name, strerror(errno));
			return false;
		}
	}
	
	// permission checking
	if (strstr(fn, "softx") == NULL &&
	    strstr(fn, "glx") == NULL &&
	    strstr(fn, "softsdl") == NULL &&
	    strstr(fn, "sdlgl") == NULL) { // softx doesn't require root	
#if 0
		if (st.st_uid != 0) {
			Com_Printf( "LoadLibrary(\"%s\") failed: ref is not owned by root\n", name);
			return false;
		}
		if ((st.st_mode & 0777) & ~0700) {
			Com_Printf( "LoadLibrary(\"%s\") failed: invalid permissions, must be 700 for security considerations\n", name);
			return false;
		}
#endif
	} else {
		// softx requires we give up root now
		setreuid(getuid(), getuid());
		setegid(getgid());
	}

	if ( ( reflib_library = dlopen( fn, RTLD_LAZY ) ) == 0 )
	{
		Com_Printf( "LoadLibrary(\"%s\") failed: %s\n", name , dlerror());
		return false;
	}

	Com_Printf( "LoadLibrary(\"%s\")\n", fn );

	ri.Cmd_AddCommand = Cmd_AddCommand;
	ri.Cmd_RemoveCommand = Cmd_RemoveCommand;
	ri.Cmd_Argc = Cmd_Argc;
	ri.Cmd_Argv = Cmd_Argv;
	ri.Cmd_ExecuteText = Cbuf_ExecuteText;
	ri.Con_Printf = VID_Printf;
	ri.Sys_Error = VID_Error;
	ri.FS_LoadFile = FS_LoadFile;
	ri.FS_FreeFile = FS_FreeFile;
	ri.FS_Gamedir = FS_Gamedir;
	ri.Cvar_Get = Cvar_Get;
	ri.Cvar_Set = Cvar_Set;
	ri.Cvar_SetValue = Cvar_SetValue;
	ri.Vid_GetModeInfo = VID_GetModeInfo;
	ri.Vid_MenuInit = VID_MenuInit;
	ri.Vid_NewWindow = VID_NewWindow;

	#ifdef QMAX
	ri.SetParticlePics = SetParticleImages;
	#endif

	if ( ( GetRefAPI = (void *) dlsym( reflib_library, "GetRefAPI" ) ) == 0 )
		Com_Error( ERR_FATAL, "dlsym failed on %s", name );

	re = GetRefAPI( ri );

	if (re.api_version != API_VERSION)
//.........这里部分代码省略.........

void *Z_Malloc(int iSize, memtag_t eTag, qboolean bZeroit, int unusedAlign)
#endif
{	
	gbMemFreeupOccured = qfalse;

	if (iSize == 0)
	{
		zoneHeader_t *pMemory = (zoneHeader_t *) &gZeroMalloc;
		return &pMemory[1];
	}

	// Add in tracking info and round to a longword...  (ignore longword aligning now we're not using contiguous blocks)
	//
//	int iRealSize = (iSize + sizeof(zoneHeader_t) + sizeof(zoneTail_t) + 3) & 0xfffffffc;
	int iRealSize = (iSize + sizeof(zoneHeader_t) + sizeof(zoneTail_t));

	// Allocate a chunk...
	//
	zoneHeader_t *pMemory = NULL;
	while (pMemory == NULL)
	{
		#ifdef _WIN32
		if (gbMemFreeupOccured)
		{
			Sleep(1000);	// sleep for a second, so Windows has a chance to shuffle mem to de-swiss-cheese it
		}
		#endif

		if (bZeroit) {
			pMemory = (zoneHeader_t *) calloc ( iRealSize, 1 );
		} else {
			pMemory = (zoneHeader_t *) malloc ( iRealSize );
		}
		if (!pMemory)
		{
			// new bit, if we fail to malloc memory, try dumping some of the cached stuff that's non-vital and try again...
			//

			// ditch the BSP cache...
			//
			if (CM_DeleteCachedMap(qfalse))
			{
				gbMemFreeupOccured = qtrue;
				continue;		// we've just ditched a whole load of memory, so try again with the malloc
			}


			// ditch any sounds not used on this level...
			//
			extern qboolean SND_RegisterAudio_LevelLoadEnd(qboolean bDeleteEverythingNotUsedThisLevel);
			if (SND_RegisterAudio_LevelLoadEnd(qtrue))
			{
				gbMemFreeupOccured = qtrue;
				continue;		// we've dropped at least one sound, so try again with the malloc
			}


			// ditch any image_t's (and associated GL texture mem) not used on this level...
			//
			if (re.RegisterImages_LevelLoadEnd())
			{
				gbMemFreeupOccured = qtrue;
				continue;		// we've dropped at least one image, so try again with the malloc
			}


			// ditch the model-binaries cache...  (must be getting desperate here!)
			//
			if (re.RegisterModels_LevelLoadEnd(qtrue))
			{
				gbMemFreeupOccured = qtrue;
				continue;
			}

			// as a last panic measure, dump all the audio memory, but not if we're in the audio loader 
			//	(which is annoying, but I'm not sure how to ensure we're not dumping any memory needed by the sound
			//	currently being loaded if that was the case)...
			//
			// note that this keeps querying until it's freed up as many bytes as the requested size, but freeing
			//	several small blocks might not mean that one larger one is satisfiable after freeup, however that'll
			//	just make it go round again and try for freeing up another bunch of blocks until the total is satisfied 
			//	again (though this will have freed twice the requested amount in that case), so it'll either work 
			//	eventually or not free up enough and drop through to the final ERR_DROP. No worries...
			//
			extern qboolean gbInsideLoadSound;			
			extern int SND_FreeOldestSound(void);	// I had to add a void-arg version of this because of link issues, sigh
			if (!gbInsideLoadSound)
			{
				int iBytesFreed = SND_FreeOldestSound();
				if (iBytesFreed)
				{						
					int iTheseBytesFreed = 0;
					while ( (iTheseBytesFreed = SND_FreeOldestSound()) != 0)
					{
						iBytesFreed += iTheseBytesFreed;
						if (iBytesFreed >= iRealSize)
							break;	// early opt-out since we've managed to recover enough (mem-contiguity issues aside)
					}
					gbMemFreeupOccured = qtrue;
					continue;
//.........这里部分代码省略.........