// worldio.cpp: loading & saving of maps and savegames
#include "cube.h"
#import "Entity.h"
struct persistent_entity {
short x, y, z; // cube aligned position
short attr1;
uchar type; // type is one of the above
uchar attr2, attr3, attr4;
};
void
backup(OFString *name, OFString *backupname)
{
[OFFileManager.defaultManager removeItemAtPath:backupname];
[OFFileManager.defaultManager moveItemAtPath:name toPath:backupname];
}
static OFString *cgzname, *bakname, *pcfname, *mcfname;
static void
setnames(OFString *name)
{
OFCharacterSet *cs =
[OFCharacterSet characterSetWithCharactersInString:@"/\\"];
OFRange range = [name rangeOfCharacterFromSet:cs];
OFString *pakname, *mapname;
if (range.location != OFNotFound) {
pakname = [name substringToIndex:range.location];
mapname = [name substringFromIndex:range.location + 1];
} else {
pakname = @"base";
mapname = name;
}
cgzname = [[OFString alloc]
initWithFormat:@"packages/%@/%@.cgz", pakname, mapname];
bakname = [[OFString alloc] initWithFormat:@"packages/%@/%@_%d.BAK",
pakname, mapname, lastmillis];
pcfname = [[OFString alloc]
initWithFormat:@"packages/%@/package.cfg", pakname];
mcfname = [[OFString alloc]
initWithFormat:@"packages/%@/%@.cfg", pakname, mapname];
}
// the optimize routines below are here to reduce the detrimental effects of
// messy mapping by setting certain properties (vdeltas and textures) to
// neighbouring values wherever there is no visible difference. This allows the
// mipmapper to generate more efficient mips. the reason it is done on save is
// to reduce the amount spend in the mipmapper (as that is done in realtime).
inline bool
nhf(struct sqr *s)
{
return s->type != FHF && s->type != CHF;
}
void
voptimize() // reset vdeltas on non-hf cubes
{
loop(x, ssize) loop(y, ssize)
{
struct sqr *s = S(x, y);
if (x && y) {
if (nhf(s) && nhf(S(x - 1, y)) &&
nhf(S(x - 1, y - 1)) && nhf(S(x, y - 1)))
s->vdelta = 0;
} else
s->vdelta = 0;
}
}
static void
topt(struct sqr *s, bool *wf, bool *uf, int *wt, int *ut)
{
struct sqr *o[4];
o[0] = SWS(s, 0, -1, ssize);
o[1] = SWS(s, 0, 1, ssize);
o[2] = SWS(s, 1, 0, ssize);
o[3] = SWS(s, -1, 0, ssize);
*wf = true;
*uf = true;
if (SOLID(s)) {
loopi(4) if (!SOLID(o[i]))
{
*wf = false;
*wt = s->wtex;
*ut = s->utex;
return;
}
} else {
loopi(4) if (!SOLID(o[i]))
{
if (o[i]->floor < s->floor) {
*wt = s->wtex;
*wf = false;
}
if (o[i]->ceil > s->ceil) {
*ut = s->utex;
*uf = false;
}
}
}
}
void
toptimize() // FIXME: only does 2x2, make atleast for 4x4 also
{
bool wf[4], uf[4];
struct sqr *s[4];
for (int x = 2; x < ssize - 4; x += 2) {
for (int y = 2; y < ssize - 4; y += 2) {
s[0] = S(x, y);
int wt = s[0]->wtex, ut = s[0]->utex;
topt(s[0], &wf[0], &uf[0], &wt, &ut);
topt(s[1] = SWS(s[0], 0, 1, ssize), &wf[1], &uf[1], &wt,
&ut);
topt(s[2] = SWS(s[0], 1, 1, ssize), &wf[2], &uf[2], &wt,
&ut);
topt(s[3] = SWS(s[0], 1, 0, ssize), &wf[3], &uf[3], &wt,
&ut);
loopi(4)
{
if (wf[i])
s[i]->wtex = wt;
if (uf[i])
s[i]->utex = ut;
}
}
}
}
// these two are used by getmap/sendmap.. transfers compressed maps directly
void
writemap(OFString *mname, int msize, uchar *mdata)
{
setnames(mname);
backup(cgzname, bakname);
FILE *f = fopen([cgzname cStringWithEncoding:OFLocale.encoding], "wb");
if (!f) {
conoutf(@"could not write map to %@", cgzname);
return;
}
fwrite(mdata, 1, msize, f);
fclose(f);
conoutf(@"wrote map %@ as file %@", mname, cgzname);
}
OFData *
readmap(OFString *mname)
{
setnames(mname);
return [OFData dataWithContentsOfFile:mname];
}
// save map as .cgz file. uses 2 layers of compression: first does simple
// run-length encoding and leaves out data for certain kinds of cubes, then zlib
// removes the last bits of redundancy. Both passes contribute greatly to the
// miniscule map sizes.
void
save_world(OFString *mname)
{
resettagareas(); // wouldn't be able to reproduce tagged areas
// otherwise
voptimize();
toptimize();
if (mname.length == 0)
mname = getclientmap();
setnames(mname);
backup(cgzname, bakname);
gzFile f =
gzopen([cgzname cStringWithEncoding:OFLocale.encoding], "wb9");
if (!f) {
conoutf(@"could not write map to %@", cgzname);
return;
}
hdr.version = MAPVERSION;
hdr.numents = 0;
for (Entity *e in ents)
if (e.type != NOTUSED)
hdr.numents++;
struct header tmp = hdr;
endianswap(&tmp.version, sizeof(int), 4);
endianswap(&tmp.waterlevel, sizeof(int), 16);
gzwrite(f, &tmp, sizeof(struct header));
for (Entity *e in ents) {
if (e.type != NOTUSED) {
struct persistent_entity tmp = { e.x, e.y, e.z, e.attr1,
e.type, e.attr2, e.attr3, e.attr4 };
endianswap(&tmp, sizeof(short), 4);
gzwrite(f, &tmp, sizeof(struct persistent_entity));
}
}
struct sqr *t = NULL;
int sc = 0;
#define spurge \
while (sc) { \
gzputc(f, 255); \
if (sc > 255) { \
gzputc(f, 255); \
sc -= 255; \
} else { \
gzputc(f, sc); \
sc = 0; \
} \
}
loopk(cubicsize)
{
struct sqr *s = &world[k];
#define c(f) (s->f == t->f)
// 4 types of blocks, to compress a bit:
// 255 (2): same as previous block + count
// 254 (3): same as previous, except light // deprecated
// SOLID (5)
// anything else (9)
if (SOLID(s)) {
if (t && c(type) && c(wtex) && c(vdelta)) {
sc++;
} else {
spurge;
gzputc(f, s->type);
gzputc(f, s->wtex);
gzputc(f, s->vdelta);
}
} else {
if (t && c(type) && c(floor) && c(ceil) && c(ctex) &&
c(ftex) && c(utex) && c(wtex) && c(vdelta) &&
c(tag)) {
sc++;
} else {
spurge;
gzputc(f, s->type);
gzputc(f, s->floor);
gzputc(f, s->ceil);
gzputc(f, s->wtex);
gzputc(f, s->ftex);
gzputc(f, s->ctex);
gzputc(f, s->vdelta);
gzputc(f, s->utex);
gzputc(f, s->tag);
}
}
t = s;
}
spurge;
gzclose(f);
conoutf(@"wrote map file %@", cgzname);
settagareas();
}
COMMANDN(savemap, save_world, ARG_1STR)
void
load_world(OFString *mname) // still supports all map formats that have existed
// since the earliest cube betas!
{
stopifrecording();
cleardlights();
pruneundos(0);
setnames(mname);
gzFile f =
gzopen([cgzname cStringWithEncoding:OFLocale.encoding], "rb9");
if (!f) {
conoutf(@"could not read map %@", cgzname);
return;
}
gzread(f, &hdr, sizeof(struct header) - sizeof(int) * 16);
endianswap(&hdr.version, sizeof(int), 4);
if (strncmp(hdr.head, "CUBE", 4) != 0)
fatal(@"while reading map: header malformatted");
if (hdr.version > MAPVERSION)
fatal(@"this map requires a newer version of cube");
if (sfactor < SMALLEST_FACTOR || sfactor > LARGEST_FACTOR)
fatal(@"illegal map size");
if (hdr.version >= 4) {
gzread(f, &hdr.waterlevel, sizeof(int) * 16);
endianswap(&hdr.waterlevel, sizeof(int), 16);
} else {
hdr.waterlevel = -100000;
}
[ents removeAllObjects];
loopi(hdr.numents)
{
struct persistent_entity tmp;
gzread(f, &tmp, sizeof(struct persistent_entity));
endianswap(&tmp, sizeof(short), 4);
Entity *e = [Entity entity];
e.x = tmp.x;
e.y = tmp.y;
e.z = tmp.z;
e.attr1 = tmp.attr1;
e.type = tmp.type;
e.attr2 = tmp.attr2;
e.attr3 = tmp.attr3;
e.attr4 = tmp.attr4;
[ents addObject:e];
if (e.type == LIGHT) {
if (!e.attr2)
e.attr2 = 255; // needed for MAPVERSION<=2
if (e.attr1 > 32)
e.attr1 = 32; // 12_03 and below
}
}
free(world);
setupworld(hdr.sfactor);
char texuse[256];
loopi(256) texuse[i] = 0;
struct sqr *t = NULL;
loopk(cubicsize)
{
struct sqr *s = &world[k];
int type = gzgetc(f);
switch (type) {
case 255: {
int n = gzgetc(f);
for (int i = 0; i < n; i++, k++)
memcpy(&world[k], t, sizeof(struct sqr));
k--;
break;
}
case 254: // only in MAPVERSION<=2
{
memcpy(s, t, sizeof(struct sqr));
s->r = s->g = s->b = gzgetc(f);
gzgetc(f);
break;
}
case SOLID: {
s->type = SOLID;
s->wtex = gzgetc(f);
s->vdelta = gzgetc(f);
if (hdr.version <= 2) {
gzgetc(f);
gzgetc(f);
}
s->ftex = DEFAULT_FLOOR;
s->ctex = DEFAULT_CEIL;
s->utex = s->wtex;
s->tag = 0;
s->floor = 0;
s->ceil = 16;
break;
}
default: {
if (type < 0 || type >= MAXTYPE)
fatal(@"while reading map: type out of range: "
@"%d @ %d",
type, k);
s->type = type;
s->floor = gzgetc(f);
s->ceil = gzgetc(f);
if (s->floor >= s->ceil)
s->floor = s->ceil - 1; // for pre 12_13
s->wtex = gzgetc(f);
s->ftex = gzgetc(f);
s->ctex = gzgetc(f);
if (hdr.version <= 2) {
gzgetc(f);
gzgetc(f);
}
s->vdelta = gzgetc(f);
s->utex = (hdr.version >= 2) ? gzgetc(f) : s->wtex;
s->tag = (hdr.version >= 5) ? gzgetc(f) : 0;
s->type = type;
}
}
s->defer = 0;
t = s;
texuse[s->wtex] = 1;
if (!SOLID(s))
texuse[s->utex] = texuse[s->ftex] = texuse[s->ctex] = 1;
}
gzclose(f);
calclight();
settagareas();
int xs, ys;
loopi(256) if (texuse[i]) lookuptexture(i, &xs, &ys);
conoutf(@"read map %@ (%d milliseconds)", cgzname,
SDL_GetTicks() - lastmillis);
conoutf(@"%s", hdr.maptitle);
startmap(mname);
loopl(256)
{
// can this be done smarter?
OFString *aliasname =
[OFString stringWithFormat:@"level_trigger_%d", l];
if (identexists(aliasname))
alias(aliasname, @"");
}
OFIRI *gameDataIRI = Cube.sharedInstance.gameDataIRI;
execfile([gameDataIRI
IRIByAppendingPathComponent:@"data/default_map_settings.cfg"]);
execfile([gameDataIRI IRIByAppendingPathComponent:pcfname]);
execfile([gameDataIRI IRIByAppendingPathComponent:mcfname]);
}