Implement XASH_LOW_MEMORY, memory-reduced configuration

common/port.h

@@ -126,6 +126,9 @@ GNU General Public License for more details.
 		#define XASH_ALLOW_SAVERESTORE_OFFSETS
 	#endif
 #endif //WIN32
+#ifndef XASH_LOW_MEMORY
+#define XASH_LOW_MEMORY 0
+#endif
 
 #include <stdlib.h>
 #include <string.h>

engine/client/cl_game.c

@@ -1123,8 +1123,9 @@ void CL_InitEdicts( void )
 	Assert( clgame.entities == NULL );
 
 	if( !clgame.mempool ) return; // Host_Error without client
-
-	CL_UPDATE_BACKUP = ( cl.maxclients == 1 ) ? SINGLEPLAYER_BACKUP : MULTIPLAYER_BACKUP;
+#if XASH_LOW_MEMORY != 2
+	CL_UPDATE_BACKUP = ( cl.maxclients <= 1 ) ? SINGLEPLAYER_BACKUP : MULTIPLAYER_BACKUP;
+#endif
 	cls.num_client_entities = CL_UPDATE_BACKUP * NUM_PACKET_ENTITIES;
 	cls.packet_entities = Mem_Realloc( clgame.mempool, cls.packet_entities, sizeof( entity_state_t ) * cls.num_client_entities );
 	clgame.entities = Mem_Calloc( clgame.mempool, sizeof( cl_entity_t ) * clgame.maxEntities );

engine/client/cl_parse.c

@@ -21,9 +21,9 @@ GNU General Public License for more details.
 #include "shake.h"
 #include "hltv.h"
 #include "input.h"
-
+#if XASH_LOW_MEMORY != 2
 int CL_UPDATE_BACKUP = SINGLEPLAYER_BACKUP;
-
+#endif
 /*
 ===============
 CL_UserMsgStub
@@ -881,7 +881,7 @@ void CL_ParseServerData( sizebuf_t *msg )
 	cl.playernum = MSG_ReadByte( msg );
 	cl.maxclients = MSG_ReadByte( msg );
 	clgame.maxEntities = MSG_ReadWord( msg );
-	clgame.maxEntities = bound( 600, clgame.maxEntities, MAX_EDICTS );
+	clgame.maxEntities = bound( 30, clgame.maxEntities, MAX_EDICTS );
 	clgame.maxModels = MSG_ReadWord( msg );
 	Q_strncpy( clgame.mapname, MSG_ReadString( msg ), MAX_STRING );
 	Q_strncpy( clgame.maptitle, MSG_ReadString( msg ), MAX_STRING );
@@ -2394,7 +2394,7 @@ void CL_ParseLegacyServerData( sizebuf_t *msg )
 	cl.playernum = MSG_ReadByte( msg );
 	cl.maxclients = MSG_ReadByte( msg );
 	clgame.maxEntities = MSG_ReadWord( msg );
-	clgame.maxEntities = bound( 600, clgame.maxEntities, 4096 );
+	clgame.maxEntities = bound( 30, clgame.maxEntities, 4096 );
 	clgame.maxModels = 512;
 	Q_strncpy( clgame.mapname, MSG_ReadString( msg ), MAX_STRING );
 	Q_strncpy( clgame.maptitle, MSG_ReadString( msg ), MAX_STRING );

engine/client/client.h

@@ -96,7 +96,11 @@ typedef struct
 #define ANGLE_MASK		(ANGLE_BACKUP - 1)
 
 #define CL_UPDATE_MASK	(CL_UPDATE_BACKUP - 1)
+#if XASH_LOW_MEMORY == 2
+#define CL_UPDATE_BACKUP SINGLEPLAYER_BACKUP
+#else
 extern int CL_UPDATE_BACKUP;
+#endif
 
 #define SIGNONS		2		// signon messages to receive before connected
 #define INVALID_HANDLE	0xFFFF		// for XashXT cache system

engine/client/console.c

@@ -37,15 +37,19 @@ static qboolean g_utf8 = false;
 #define COLOR_DEFAULT	'7'
 #define CON_HISTORY		64
 #define MAX_DBG_NOTIFY	128
+#if XASH_LOW_MEMORY
+#define CON_NUMFONTS	1		// do not load different font textures
+#define CON_TEXTSIZE	32768	// max scrollback buffer characters in console (32 kb)
+#define CON_MAXLINES	2048	// max scrollback buffer lines in console
+#else
 #define CON_NUMFONTS	3	// maxfonts
-
+#define CON_TEXTSIZE	1048576	// max scrollback buffer characters in console (1 Mb)
+#define CON_MAXLINES	16384	// max scrollback buffer lines in console
+#endif
 #define CON_LINES( i )	(con.lines[(con.lines_first + (i)) % con.maxlines])
 #define CON_LINES_COUNT	con.lines_count
 #define CON_LINES_LAST()	CON_LINES( CON_LINES_COUNT - 1 )
 
-#define CON_TEXTSIZE	1048576	// max scrollback buffer characters in console (1 Mb)
-#define CON_MAXLINES	16384	// max scrollback buffer lines in console
-
 // console color typeing
 rgba_t g_color_table[8] =
 {
@@ -663,7 +667,7 @@ static void Con_LoadConchars( void )
 	int	i, fontSize;
 
 	// load all the console fonts
-	for( i = 0; i < 3; i++ )
+	for( i = 0; i < CON_NUMFONTS; i++ )
 		Con_LoadConsoleFont( i, con.chars + i );
 
 	// select properly fontsize
@@ -673,6 +677,9 @@ static void Con_LoadConchars( void )
 		fontSize = 2;
 	else fontSize = 1;
 
+	if( fontSize > CON_NUMFONTS - 1 )
+		fontSize = CON_NUMFONTS - 1;
+
 	// sets the current font
 	con.lastUsedFont = con.curFont = &con.chars[fontSize];
 }
@@ -929,7 +936,7 @@ choose font size
 */
 void Con_SetFont( int fontNum )
 {
-	fontNum = bound( 0, fontNum, 2 ); 
+	fontNum = bound( 0, fontNum, CON_NUMFONTS - 1 );
 	con.curFont = &con.chars[fontNum];
 }
 
@@ -2359,7 +2366,9 @@ void Con_VidInit( void )
 	Con_CheckResize();
 
 	Con_LoadConchars();
-
+#if XASH_LOW_MEMORY
+	con.background = R_GetBuiltinTexture( REF_BLACK_TEXTURE );
+#else
 	// loading console image
 	if( host.allow_console )
 	{
@@ -2434,6 +2443,7 @@ void Con_VidInit( void )
 	// missed console image will be replaced as gray background like X-Ray or Crysis
 	if( con.background == R_GetBuiltinTexture( REF_DEFAULT_TEXTURE ) || con.background == 0 )
 		con.background = R_GetBuiltinTexture( REF_GRAY_TEXTURE );
+#endif
 }
 
 /*

engine/common/common.h

@@ -141,6 +141,11 @@ typedef enum
 #define MAX_DECALS		512	// touching TE_DECAL messages, etc
 #define MAX_STATIC_ENTITIES	3096	// static entities that moved on the client when level is spawn
 
+#if XASH_LOW_MEMORY == 2
+#define MAX_DECALS		32	// touching TE_DECAL messages, etc
+#define MAX_STATIC_ENTITIES	32	// static entities that moved on the client when level is spawn
+#endif
+
 // filesystem flags
 #define FS_STATIC_PATH  ( 1U << 0 )  // FS_ClearSearchPath will be ignore this path
 #define FS_NOWRITE_PATH ( 1U << 1 )  // default behavior - last added gamedir set as writedir. This flag disables it

engine/common/net_ws.h

@@ -30,7 +30,11 @@ typedef enum
 #define MAX_MULTICAST		8192	// some mods spamming for rain effect
 
 #define MAX_INIT_MSG		0x20000	// max length of possible message
-
+#if XASH_LOW_MEMORY == 2
+#define MAX_INIT_MSG 0x8000
+#define MAX_DATAGRAM 1024
+#define MAX_MULTICAST 1024
+#endif
 // net packets type
 #define NET_HEADER_OUTOFBANDPACKET	-1
 #define NET_HEADER_SPLITPACKET	-2

engine/common/netchan.h

@@ -78,17 +78,24 @@ GNU General Public License for more details.
 #define PORT_SERVER			27015
 
 #define MULTIPLAYER_BACKUP		64	// how many data slots to use when in multiplayer (must be power of 2)
-#define SINGLEPLAYER_BACKUP		16	// same for single player  
+#define SINGLEPLAYER_BACKUP		16	// same for single player
 #define CMD_BACKUP			64	// allow a lot of command backups for very fast systems
 #define CMD_MASK			(CMD_BACKUP - 1)
 #define NUM_PACKET_ENTITIES		256	// 170 Mb for multiplayer with 32 players
 #define MAX_CUSTOM_BASELINES		64
-
 #define NET_LEGACY_EXT_SPLIT		(1U<<1)
 #define NETSPLIT_BACKUP 8
 #define NETSPLIT_BACKUP_MASK (NETSPLIT_BACKUP - 1)
 #define NETSPLIT_HEADER_SIZE 18
 
+#if XASH_LOW_MEMORY == 2
+	#define MULTIPLAYER_BACKUP		4	// how many data slots to use when in multiplayer (must be power of 2)
+	#define SINGLEPLAYER_BACKUP		4	// same for single player
+	#define NUM_PACKET_ENTITIES		32	// 170 Mb for multiplayer with 32 players
+	#define MAX_CUSTOM_BASELINES		8
+	#define NET_MAX_FRAGMENT		32768
+#endif
+
 typedef struct netsplit_chain_packet_s
 {
 	// bool vector

engine/common/protocol.h

@@ -133,6 +133,31 @@ GNU General Public License for more details.
 #define MAX_LIGHTSTYLES		64		// original quake limit
 #define MAX_RENDER_DECALS		4096		// max rendering decals per a level
 
+#if XASH_LOW_MEMORY == 2
+// memory reduced protocol, not for use in multiplayer
+#define MAX_VISIBLE_PACKET_BITS	7	// 2048 visible entities per frame (hl1 has 256)
+#define MAX_VISIBLE_PACKET		(1<<MAX_VISIBLE_PACKET_BITS)
+#define MAX_VISIBLE_PACKET_VIS_BYTES	((MAX_VISIBLE_PACKET + 7) / 8)
+
+#define MAX_EVENT_BITS		7
+#define MAX_EVENTS			(1<<MAX_EVENT_BITS)	// 10 bits == 1024 events (the original Half-Life limit)
+
+#define MAX_MODEL_BITS		8		// 12 bits == 4096 models
+#define MAX_SUPPORTED_MODELS		(1<<MAX_MODEL_BITS)
+
+#define MAX_MODELS			256
+
+#define MAX_SOUND_BITS		8
+#define MAX_SOUNDS			(1<<MAX_SOUND_BITS)	// 11 bits == 2048 sounds
+
+#define MAX_CUSTOM_BITS		4
+#define MAX_CUSTOM			(1<<MAX_CUSTOM_BITS)// 10 bits == 1024 generic file
+
+#define MAX_DLIGHTS			16		// dynamic lights (rendered per one frame)
+#define MAX_ELIGHTS			32		// entity only point lights
+#define MAX_RENDER_DECALS		64		// max rendering decals per a level
+#endif
+
 // sound proto
 #define MAX_SND_FLAGS_BITS		14
 #define MAX_SND_CHAN_BITS		4

engine/server/server.h

@@ -32,7 +32,11 @@ GNU General Public License for more details.
 //=============================================================================
 
 #define SV_UPDATE_MASK	(SV_UPDATE_BACKUP - 1)
+#if XASH_LOW_MEMORY == 2
+#define SV_UPDATE_BACKUP SINGLEPLAYER_BACKUP
+#else
 extern int SV_UPDATE_BACKUP;
+#endif
 
 // hostflags
 #define SVF_SKIPLOCALHOST	BIT( 0 )

engine/server/sv_init.c

@@ -17,9 +17,9 @@ GNU General Public License for more details.
 #include "server.h"
 #include "net_encode.h"
 #include "library.h"
-
+#if XASH_LOW_MEMORY != 2
 int SV_UPDATE_BACKUP = SINGLEPLAYER_BACKUP;
-
+#endif
 server_t		sv;	// local server
 server_static_t	svs;	// persistant server info
 svgame_static_t	svgame;	// persistant game info
@@ -752,7 +752,9 @@ void SV_SetupClients( void )
 
 	// feedback for cvar
 	Cvar_FullSet( "maxplayers", va( "%d", svs.maxclients ), FCVAR_LATCH );
+#if XASH_LOW_MEMORY != 2
 	SV_UPDATE_BACKUP = ( svs.maxclients == 1 ) ? SINGLEPLAYER_BACKUP : MULTIPLAYER_BACKUP;
+#endif
 
 	svs.clients = Z_Realloc( svs.clients, sizeof( sv_client_t ) * svs.maxclients );
 	svs.num_client_entities = svs.maxclients * SV_UPDATE_BACKUP * NUM_PACKET_ENTITIES;