// worldio.cpp: loading & saving of maps and savegames
#include "cube.h"
void
backup(char *name, char *backupname)
{
remove(backupname);
rename(name, backupname);
};
string cgzname, bakname, pcfname, mcfname;
void
setnames(char *name)
{
string pakname, mapname;
char *slash = strpbrk(name, "/\\");
if (slash) {
strn0cpy(pakname, name, slash - name + 1);
strcpy_s(mapname, slash + 1);
} else {
strcpy_s(pakname, "base");
strcpy_s(mapname, name);
};
sprintf_s(cgzname)("packages/%s/%s.cgz", pakname, mapname);
sprintf_s(bakname)(
"packages/%s/%s_%d.BAK", pakname, mapname, lastmillis);
sprintf_s(pcfname)("packages/%s/package.cfg", pakname);
sprintf_s(mcfname)("packages/%s/%s.cfg", pakname, mapname);
path(cgzname);
path(bakname);
};
// 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(sqr *s)
{
return s->type != FHF && s->type != CHF;
};
void
voptimize() // reset vdeltas on non-hf cubes
{
loop(x, ssize) loop(y, ssize)
{
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;
};
};
void
topt(sqr *s, bool &wf, bool &uf, int &wt, int &ut)
{
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];
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(char *mname, int msize, uchar *mdata)
{
setnames(mname);
backup(cgzname, bakname);
FILE *f = fopen(cgzname, "wb");
if (!f) {
conoutf(@"could not write map to %s", cgzname);
return;
};
fwrite(mdata, 1, msize, f);
fclose(f);
conoutf(@"wrote map %s as file %s", mname, cgzname);
}
uchar *
readmap(char *mname, int *msize)
{
setnames(mname);
uchar *mdata = (uchar *)loadfile(cgzname, msize);
if (!mdata) {
conoutf(@"could not read map %s", cgzname);
return NULL;
};
return mdata;
}
// 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(char *mname)
{
resettagareas(); // wouldn't be able to reproduce tagged areas otherwise
voptimize();
toptimize();
if (!*mname)
mname = getclientmap();
setnames(mname);
backup(cgzname, bakname);
gzFile f = gzopen(cgzname, "wb9");
if (!f) {
conoutf(@"could not write map to %s", cgzname);
return;
};
hdr.version = MAPVERSION;
hdr.numents = 0;
loopv(ents) if (ents[i].type != NOTUSED) hdr.numents++;
header tmp = hdr;
endianswap(&tmp.version, sizeof(int), 4);
endianswap(&tmp.waterlevel, sizeof(int), 16);
gzwrite(f, &tmp, sizeof(header));
loopv(ents)
{
if (ents[i].type != NOTUSED) {
entity tmp = ents[i];
endianswap(&tmp, sizeof(short), 4);
gzwrite(f, &tmp, sizeof(persistent_entity));
};
};
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)
{
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 %s", cgzname);
settagareas();
};
void
load_world(char *mname) // still supports all map formats that have existed
// since the earliest cube betas!
{
stopifrecording();
cleardlights();
pruneundos();
setnames(mname);
gzFile f = gzopen(cgzname, "rb9");
if (!f) {
conoutf(@"could not read map %s", cgzname);
return;
};
gzread(f, &hdr, sizeof(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.setsize(0);
loopi(hdr.numents)
{
entity &e = ents.add();
gzread(f, &e, sizeof(persistent_entity));
endianswap(&e, sizeof(short), 4);
e.spawned = false;
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;
sqr *t = NULL;
loopk(cubicsize)
{
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(sqr));
k--;
break;
};
case 254: // only in MAPVERSION<=2
{
memcpy(s, t, sizeof(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) {
sprintf_sd(t)("%d @ %d", type, k);
fatal("while reading map: type out of range: ",
t);
};
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) lookuptexture(i, xs, ys);
conoutf(@"read map %s (%d milliseconds)", cgzname,
SDL_GetTicks() - lastmillis);
conoutf(@"%s", hdr.maptitle);
startmap(mname);
loopl(256)
{
sprintf_sd(aliasname)(
"level_trigger_%d", l); // can this be done smarter?
if (identexists(aliasname))
alias(aliasname, "");
};
execfile("data/default_map_settings.cfg");
execfile(pcfname);
execfile(mcfname);
};
COMMANDN(savemap, save_world, ARG_1STR);