void
mdfour(unsigned char *out, const unsigned char *in, int n){
struct mdfour md;
mdfour_begin(&md);
mdfour_update(&md, in, n);
mdfour_result(&md, out);
}
static void CalcHash( void **list ) {
struct mdfour md;
file_info_t *info;
size_t len;
mdfour_begin( &md );
while( *list ) {
info = *list++;
len = sizeof( *info ) + strlen( info->name ) - 1;
mdfour_update( &md, ( uint8_t * )info, len );
}
mdfour_result( &md, m_demos.hash );
}
int
get_checksum2(char *buf,int len,char *sum)
{
int i;
static char *buf1;
static int len1;
struct mdfour m;
char tsum[MD4_LENGTH];
if (len > len1) {
if (buf1) free(buf1);
buf1 = (char *)malloc(len+4);
len1 = len;
errno = ENOMEM;
if (!buf1) return -1;
}
mdfour_begin(&m);
memcpy(buf1,buf,len);
if (checksum_seed) {
SIVAL(buf1,len,checksum_seed);
len += 4;
}
for(i = 0; i + CSUM_CHUNK <= len; i += CSUM_CHUNK) {
mdfour_update(&m, (uchar *)(buf1+i), CSUM_CHUNK);
}
if (len - i > 0) {
mdfour_update(&m, (uchar *)(buf1+i), (len-i));
}
mdfour_result(&m, (uchar *)tsum);
memcpy(sum, tsum, SUM_LENGTH);
return 0;
}
void
gl_Mod_MakeAliasModelDisplayLists (model_t *m, aliashdr_t *hdr, void *_m,
int _s, int extra)
{
dstring_t *cache, *fullpath;
unsigned char model_digest[MDFOUR_DIGEST_BYTES];
unsigned char mesh_digest[MDFOUR_DIGEST_BYTES];
int i, j;
int *cmds;
QFile *f;
qboolean remesh = true;
qboolean do_cache = false;
aliasmodel = m;
paliashdr = hdr;
cache = dstring_new ();
fullpath = dstring_new ();
if (!gl_alias_render_tri->int_val) {
if (gl_mesh_cache->int_val
&& gl_mesh_cache->int_val <= paliashdr->mdl.numtris) {
do_cache = true;
mdfour (model_digest, (unsigned char *) _m, _s);
// look for a cached version
dstring_copystr (cache, "glquake/");
dstring_appendstr (cache, m->name);
QFS_StripExtension (m->name + strlen ("progs/"),
cache->str + strlen ("glquake/"));
dstring_appendstr (cache, ".qfms");
QFS_FOpenFile (cache->str, &f);
if (f) {
unsigned char d1[MDFOUR_DIGEST_BYTES];
unsigned char d2[MDFOUR_DIGEST_BYTES];
struct mdfour md;
int len, vers;
int nc = 0, no = 0;
int *c = 0, *vo = 0;
memset (d1, 0, sizeof (d1));
memset (d2, 0, sizeof (d2));
Qread (f, &vers, sizeof (int));
Qread (f, &len, sizeof (int));
Qread (f, &nc, sizeof (int));
Qread (f, &no, sizeof (int));
if (vers == 1 && (nc + no) == len) {
c = malloc (((nc + 1023) & ~1023) * sizeof (c[0]));
vo = malloc (((no + 1023) & ~1023) * sizeof (vo[0]));
if (!c || !vo)
Sys_Error ("gl_mesh.c: out of memory");
Qread (f, c, nc * sizeof (c[0]));
Qread (f, vo, no * sizeof (vo[0]));
Qread (f, d1, MDFOUR_DIGEST_BYTES);
Qread (f, d2, MDFOUR_DIGEST_BYTES);
Qclose (f);
mdfour_begin (&md);
mdfour_update (&md, (unsigned char *) &vers, sizeof(int));
mdfour_update (&md, (unsigned char *) &len, sizeof(int));
mdfour_update (&md, (unsigned char *) &nc, sizeof(int));
mdfour_update (&md, (unsigned char *) &no, sizeof(int));
mdfour_update (&md, (unsigned char *) c, nc * sizeof (c[0]));
mdfour_update (&md, (unsigned char *) vo, no * sizeof (vo[0]));
mdfour_update (&md, d1, MDFOUR_DIGEST_BYTES);
mdfour_result (&md, mesh_digest);
if (memcmp (d2, mesh_digest, MDFOUR_DIGEST_BYTES) == 0
&& memcmp (d1, model_digest, MDFOUR_DIGEST_BYTES) == 0) {
remesh = false;
numcommands = nc;
numorder = no;
if (numcommands > commands_size) {
if (commands)
free (commands);
commands_size = (numcommands + 1023) & ~1023;
commands = c;
} else {
memcpy (commands, c, numcommands * sizeof (c[0]));
free(c);
}
if (numorder > vertexorder_size) {
if (vertexorder)
free (vertexorder);
vertexorder_size = (numorder + 1023) & ~1023;
vertexorder = vo;
} else {
memcpy (vertexorder, vo, numorder * sizeof (vo[0]));
free (vo);
}
}
}
}
}
if (remesh) {
// build it from scratch
Sys_MaskPrintf (SYS_DEV, "meshing %s...\n", m->name);
BuildTris (); // trifans or lists
if (do_cache) {
// save out the cached version
dsprintf (fullpath, "%s/%s", qfs_gamedir->dir.def, cache->str);
f = QFS_WOpen (fullpath->str, 9);
if (f) {
struct mdfour md;
int vers = 1;
int len = numcommands + numorder;
mdfour_begin (&md);
mdfour_update (&md, (unsigned char *) &vers, sizeof (int));
mdfour_update (&md, (unsigned char *) &len, sizeof (int));
mdfour_update (&md, (unsigned char *) &numcommands,
sizeof (int));
mdfour_update (&md, (unsigned char *) &numorder, sizeof (int));
mdfour_update (&md, (unsigned char *) commands,
numcommands * sizeof (commands[0]));
mdfour_update (&md, (unsigned char *) vertexorder,
numorder * sizeof (vertexorder[0]));
mdfour_update (&md, model_digest, MDFOUR_DIGEST_BYTES);
mdfour_result (&md, mesh_digest);
Qwrite (f, &vers, sizeof (int));
Qwrite (f, &len, sizeof (int));
Qwrite (f, &numcommands, sizeof (int));
Qwrite (f, &numorder, sizeof (int));
Qwrite (f, commands, numcommands * sizeof (commands[0]));
Qwrite (f, vertexorder, numorder * sizeof (vertexorder[0]));
Qwrite (f, model_digest, MDFOUR_DIGEST_BYTES);
Qwrite (f, mesh_digest, MDFOUR_DIGEST_BYTES);
Qclose (f);
}
}
}
// save the data out
paliashdr->poseverts = numorder;
cmds = Hunk_Alloc (numcommands * sizeof (int));
paliashdr->commands = (byte *) cmds - (byte *) paliashdr;
memcpy (cmds, commands, numcommands * sizeof (int));
} else {
tex_coord_t *tex_coord;
numorder = 0;
for (i=0; i < pheader->mdl.numtris; i++) {
add_vertex(triangles[i].vertindex[0]);
add_vertex(triangles[i].vertindex[1]);
add_vertex(triangles[i].vertindex[2]);
}
paliashdr->poseverts = numorder;
tex_coord = Hunk_Alloc (numorder * sizeof(tex_coord_t));
paliashdr->tex_coord = (byte *) tex_coord - (byte *) paliashdr;
for (i=0; i < numorder; i++) {
float s, t;
int k;
k = vertexorder[i];
s = stverts[k].s;
t = stverts[k].t;
if (!triangles[i/3].facesfront && stverts[k].onseam)
s += pheader->mdl.skinwidth / 2; // on back side
s = (s + 0.5) / pheader->mdl.skinwidth;
t = (t + 0.5) / pheader->mdl.skinheight;
tex_coord[i].st[0] = s;
tex_coord[i].st[1] = t;
}
}
if (extra) {
trivertx16_t *verts;
verts = Hunk_Alloc (paliashdr->numposes * paliashdr->poseverts
* sizeof (trivertx16_t));
paliashdr->posedata = (byte *) verts - (byte *) paliashdr;
for (i = 0; i < paliashdr->numposes; i++) {
trivertx_t *pv = poseverts[i];
for (j = 0; j < numorder; j++) {
trivertx16_t v;
// convert MD16's split coordinates into something a little
// saner. The first chunk of vertices is fully compatible with
// IDPO alias models (even the scale). The second chunk is the
// fractional bits of the vertex, giving 8.8. However, it's
// easier for us to multiply everything by 256 and adjust the
// model scale appropriately
VectorMultAdd (pv[vertexorder[j] + hdr->mdl.numverts].v,
256, pv[vertexorder[j]].v, v.v);
v.lightnormalindex =
poseverts[i][vertexorder[j]].lightnormalindex;
*verts++ = v;
}
}
} else {
trivertx_t *verts;
verts = Hunk_Alloc (paliashdr->numposes * paliashdr->poseverts
* sizeof (trivertx_t));
paliashdr->posedata = (byte *) verts - (byte *) paliashdr;
for (i = 0; i < paliashdr->numposes; i++) {
for (j = 0; j < numorder; j++)
*verts++ = poseverts[i][vertexorder[j]];
}
}
dstring_delete (cache);
dstring_delete (fullpath);
}
void
hash_result_as_bytes(struct hash *hash, unsigned char *out)
{
mdfour_result(&hash->md, out);
}
/* return the hash result as 16 binary bytes */
void
hash_result_as_bytes(struct mdfour *md, unsigned char *out)
{
hash_buffer(md, NULL, 0);
mdfour_result(md, out);
}