Add support for smaller lightmaps

Large lightmap can be disabled for very low-end hardware. A BSP file with a smaller lightmap (_sml.bsp) will be used instead of the standard one if the map supports it

code/cgame/cg_main.c

@@ -204,6 +204,25 @@ void CG_RegisterCvars(void)
     temp            = cgi.Cvar_Get("sv_running", "0", 0);
     cgs.localServer = temp->integer;
 }
+/*
+===============
+CG_UseLargeLightmaps
+
+Added in 2.0
+Returns true if the standard BSP file should be used, false if the smaller lightmap BSP file should be used
+===============
+*/
+qboolean CG_UseLargeLightmaps(const char* mapName) {
+	char buffer[MAX_QPATH];
+
+	Com_sprintf(buffer, sizeof(buffer), "maps/%s_sml.bsp", mapName);
+
+	if (cgi.FS_ReadFile(buffer, NULL, qtrue) == -1) {
+		return qtrue;
+	}
+
+	return cgi.Cvar_Get("r_largemap", "0", 0)->integer;
+}
 
 /*
 ================

code/cgame/cg_servercmds.c

@@ -190,8 +190,12 @@ void CG_ParseServerinfo(void)
         Q_strncpyz(map, mapname, sizeof(map));
     }
 
-    Com_sprintf(cgs.mapname, sizeof(cgs.mapname), "maps/%s.bsp", map);
-
+    if (CG_UseLargeLightmaps(mapname)) {
+        Com_sprintf(cgs.mapname, sizeof(cgs.mapname), "maps/%s.bsp", map);
+    } else {
+        Com_sprintf(cgs.mapname, sizeof(cgs.mapname), "maps/%s_sml.bsp", map);
+    }
+
     // hide/show huds
     if (cgs.gametype) {
         cgi.Cmd_Execute(EXEC_NOW, "ui_addhud hud_timelimit\n");

code/client/cl_cgame.cpp

@@ -923,7 +923,13 @@ void CL_InitCGame( void ) {
 	// find the current mapname
 	info = cl.gameState.stringData + cl.gameState.stringOffsets[ CS_SERVERINFO ];
 	mapname = Info_ValueForKey( info, "mapname" );
-	Com_sprintf( cl.mapname, sizeof( cl.mapname ), "maps/%s.bsp", mapname );
+
+	if (CL_UseLargeLightmap(mapname)) {
+		Com_sprintf(cl.mapname, sizeof(cl.mapname), "maps/%s.bsp", mapname);
+	} else {
+		// Added in 2.0
+		Com_sprintf(cl.mapname, sizeof(cl.mapname), "maps/%s_sml.bsp", mapname);
+	}
 
 	S_BeginRegistration();
 	CL_ShutdownCGame();

code/client/cl_main.cpp

@@ -172,6 +172,26 @@ void CL_ServerStatusResponse( netadr_t from, msg_t *msg );
 
 static qboolean cl_bCLSystemStarted = qfalse;
 
+/*
+===============
+CL_UseLargeLightmap
+
+Added in 2.0
+Returns true if the standard BSP file should be used, false if the smaller lightmap BSP file should be used
+===============
+*/
+qboolean CL_UseLargeLightmap(const char* mapName) {
+	char buffer[MAX_QPATH];
+
+	Com_sprintf(buffer, sizeof(buffer), "maps/%s_sml.bsp", mapName);
+
+	if (FS_ReadFileEx(buffer, NULL, qtrue) == -1) {
+		return qtrue;
+	}
+
+	return Cvar_Get("r_largemap", "0", 0)->integer;
+}
+
 /*
 ===============
 CL_CDDialog

code/client/cl_ui.cpp

@@ -5799,8 +5799,15 @@ void UI_BeginLoad(const char *pszMapName)
 
         loadName = "maps/";
         loadName += pszMapName;
+        mapfile = loadName;
         loadName += ".min";
-        mapfile = loadName + ".bsp";
+
+        if (CL_UseLargeLightmap(pszMapName)) {
+            mapfile += ".bsp";
+        } else {
+            // Added in 2.0
+            mapfile += "_sml.bsp";
+        }
 
         if (UI_ArchiveLoadMapinfo(mapfile)) {
             cls.loading = SS_LOADING2;

code/null/null_client.c

@@ -129,3 +129,7 @@ qboolean CL_FinishedIntro( void ) {
 int R_CountTextureMemory() {
     return 0;
 }
+
+qboolean CL_UseLargeLightmap(const char* mapName) {
+	return qtrue;
+}

code/qcommon/qcommon.h

@@ -1217,6 +1217,9 @@ void	CL_ForwardCommandToServer( const char *string );
 // things like godmode, noclip, etc, are commands directed to the server,
 // so when they are typed in at the console, they will need to be forwarded.
 
+qboolean CL_UseLargeLightmap(const char* mapName);
+// returns true if the standard BSP file should be used
+
 void CL_CDDialog( void );
 // bring up the "need a cd to play" dialog
 

code/renderergl1/tr_init.c

@@ -102,6 +102,7 @@ cvar_t	*r_depthbits;
 cvar_t	*r_colorbits;
 cvar_t	*r_stereo;
 cvar_t	*r_primitives;
+cvar_t	*r_largemap;
 cvar_t	*r_textureDetails;
 cvar_t	*r_texturebits;
 
@@ -1346,11 +1347,18 @@ void R_Register( void )
 
 	r_picmip = ri.Cvar_Get ("r_picmip", "1", CVAR_ARCHIVE | CVAR_LATCH );
 	r_picmip_cap = ri.Cvar_Get ("r_picmip_cap", "0", CVAR_ARCHIVE | CVAR_LATCH );
+    if (r_picmip->integer < r_picmip_cap->integer) {
+        ri.Cvar_Set("r_picmip", r_picmip_cap->integer);
+    }
+
+    if (r_picmip->integer < 2) {
+        r_largemap = ri.Cvar_Get("r_largemap", "1", 0);
+	} else {
+		r_largemap = ri.Cvar_Get("r_largemap", "0", 0);
+	}
+
 	r_roundImagesDown = ri.Cvar_Get ("r_roundImagesDown", "1", CVAR_ARCHIVE | CVAR_LATCH );
 	r_colorMipLevels = ri.Cvar_Get ("r_colorMipLevels", "0", CVAR_LATCH );
-	if (r_picmip->integer < r_picmip_cap->integer) {
-		ri.Cvar_Set("r_picmip", r_picmip_cap->integer);
-	}
 	AssertCvarRange( r_picmip, 0, 16, qtrue );
 	r_textureDetails = ri.Cvar_Get("r_textureDetails", "1", 33);
 	r_texturebits = ri.Cvar_Get( "r_texturebits", "0", CVAR_ARCHIVE | CVAR_LATCH );

code/renderergl1/tr_local.h

@@ -1451,6 +1451,7 @@ extern cvar_t	*r_primitives;			// "0" = based on compiled vertex array existance
 										// "2" = glDrawElements triangles
 										// "-1" = no drawing
 
+extern cvar_t	*r_largemap;
 extern cvar_t	*r_inGameVideo;				// controls whether in game video should be draw
 extern cvar_t	*r_fastsky;				// controls whether sky should be cleared or drawn
 extern cvar_t	*r_fastdlights;

code/server/sv_ccmds.c

@@ -193,7 +193,12 @@ static void SV_Map_f( void ) {
 
 	// make sure the level exists before trying to change, so that
 	// a typo at the server console won't end the game
-	Com_sprintf( expanded, sizeof( expanded ), "maps/%s.bsp", map );
+	// Added in 2.0
+	if ( CL_UseLargeLightmap( mapname ) ) {
+		Com_sprintf( expanded, sizeof( expanded ), "maps/%s.bsp", map );
+	} else {
+		Com_sprintf( expanded, sizeof( expanded ), "maps/%s_sml.bsp", map );
+	}
 	if( FS_ReadFile( expanded, NULL ) == -1 ) {
 		Com_Printf( "Can't find map %s\n", expanded );
 		return;

code/server/sv_init.c

@@ -697,7 +697,12 @@ void SV_SpawnServer( const char *server, qboolean loadgame, qboolean restart, qb
 		char filename[ MAX_QPATH ];
 
 		TIKI_FreeAll();
-		Com_sprintf( filename, sizeof( filename ), "maps/%s.bsp", mapname );
+		if ( CL_UseLargeLightmap( mapname ) ) {
+			Com_sprintf( filename, sizeof( filename ), "maps/%s.bsp", mapname );
+		} else {
+			// Added in 2.0
+			Com_sprintf( filename, sizeof( filename ), "maps/%s_sml.bsp", mapname );
+		}
 		CM_LoadMap( filename, qfalse, &checksum );
 
 		// set checksum