void SpriteCache::init()
{
if (ff != NULL)
fclose(ff);
ff = NULL;
changeMaxSize(elements);
cachesize = 0;
lockedSize = 0;
liststart = -1;
listend = -1;
lastLoad = -2;
maxCacheSize = DEFAULTCACHESIZE;
}
void SpriteCache::initFile_adjustBuffers(short numspri)
{
// adjust the buffers to the sprite file size
changeMaxSize(numspri + 1);
}
int SpriteCache::initFile(const char *filnam)
{
short vers;
char buff[20];
short numspri = 0;
int vv, wdd, htt;
long spr_initial_offs = 0;
int spriteFileID = 0;
for (vv = 0; vv < elements; vv++) {
images[vv] = NULL;
offsets[vv] = 0;
}
ff = clibfopen((char *)filnam, "rb");
if (ff == NULL)
return -1;
spr_initial_offs = ftell(ff);
fread(&vers, 2, 1, ff);
// read the "Sprite File" signature
fread(&buff[0], 13, 1, ff);
if ((vers < 4) || (vers > 6)) {
fclose(ff);
ff = NULL;
return -1;
}
// unknown version
buff[13] = 0;
if (strcmp(buff, spriteFileSig)) {
fclose(ff);
ff = NULL;
return -1;
}
if (vers == 4)
this->spritesAreCompressed = false;
else if (vers == 5)
this->spritesAreCompressed = true;
else if (vers >= 6)
{
this->spritesAreCompressed = (fgetc(ff) == 1);
spriteFileID = getw(ff);
}
if (vers < 5) {
// skip the palette
fseek(ff, 256 * 3, SEEK_CUR);
}
fread(&numspri, 2, 1, ff);
if (vers < 4)
numspri = 200;
#ifdef THIS_IS_THE_ENGINE
// adjust the buffers to the sprite file size
changeMaxSize(numspri + 1);
#endif
// if there is a sprite index file, use it
if (loadSpriteIndexFile(spriteFileID, spr_initial_offs, numspri))
{
// Succeeded
return 0;
}
// failed, delete the index file because it's invalid
unlink(spindexfilename);
// no sprite index file, manually index it
for (vv = 0; vv <= numspri; vv++) {
offsets[vv] = ftell(ff);
flags[vv] = 0;
int coldep = getshort(ff);
if (coldep == 0) {
offsets[vv] = 0;
images[vv] = NULL;
#ifdef THIS_IS_THE_ENGINE
// make it a blue cup, to avoid crashes
spritewidth[vv] = spritewidth[0];
spriteheight[vv] = spriteheight[0];
offsets[vv] = offsets[0];
flags[vv] = SPRCACHEFLAG_DOESNOTEXIST;
#else
// no sprite ... blank it out
spritewidth[vv] = 0;
spriteheight[vv] = 0;
offsets[vv] = 0;
#endif
if (feof(ff))
break;
continue;
}
if (feof(ff))
break;
if (vv >= elements)
break;
images[vv] = NULL;
wdd = getshort(ff);
htt = getshort(ff);
spritewidth[vv] = wdd;
spriteheight[vv] = htt;
get_new_size_for_sprite(vv, wdd, htt, spritewidth[vv], spriteheight[vv]);
long spriteDataSize;
if (vers == 5) {
spriteDataSize = getw(ff);
}
else {
spriteDataSize = wdd * coldep * htt;
}
fseek(ff, spriteDataSize, SEEK_CUR);
}
sprite0InitialOffset = offsets[0];
return 0;
}
