int lwGetPolygonTags( picoMemStream_t *fp, int cksize, lwTagList *tlist,
lwPolygonList *plist ){
unsigned int type;
int rlen = 0, i, j;
set_flen( 0 );
type = getU4( fp );
rlen = get_flen();
if ( rlen < 0 ) {
return 0;
}
if ( type != ID_SURF && type != ID_PART && type != ID_SMGP ) {
_pico_memstream_seek( fp, cksize - 4, PICO_SEEK_CUR );
return 1;
}
while ( rlen < cksize ) {
i = getVX( fp ) + plist->offset;
j = getVX( fp ) + tlist->offset;
rlen = get_flen();
if ( rlen < 0 || rlen > cksize ) {
return 0;
}
switch ( type ) {
case ID_SURF: plist->pol[ i ].surf = ( lwSurface * ) ( (size_t)j ); break;
case ID_PART: plist->pol[ i ].part = j; break;
case ID_SMGP: plist->pol[ i ].smoothgrp = j; break;
}
}
return 1;
}
lwSurface *lwGetSurface( picoMemStream_t *fp, int cksize ){
lwSurface *surf;
lwTexture *tex;
lwPlugin *shdr;
unsigned int id, type;
unsigned short sz;
int pos, rlen;
/* allocate the Surface structure */
surf = _pico_calloc( 1, sizeof( lwSurface ) );
if ( !surf ) {
goto Fail;
}
/* non-zero defaults */
surf->color.rgb[ 0 ] = 0.78431f;
surf->color.rgb[ 1 ] = 0.78431f;
surf->color.rgb[ 2 ] = 0.78431f;
surf->diffuse.val = 1.0f;
surf->glossiness.val = 0.4f;
surf->bump.val = 1.0f;
surf->eta.val = 1.0f;
surf->sideflags = 1;
/* remember where we started */
set_flen( 0 );
pos = _pico_memstream_tell( fp );
/* names */
surf->name = getS0( fp );
surf->srcname = getS0( fp );
/* first subchunk header */
id = getU4( fp );
sz = getU2( fp );
if ( 0 > get_flen() ) {
goto Fail;
}
/* process subchunks as they're encountered */
while ( 1 ) {
sz += sz & 1;
set_flen( 0 );
switch ( id ) {
case ID_COLR:
surf->color.rgb[ 0 ] = getF4( fp );
surf->color.rgb[ 1 ] = getF4( fp );
surf->color.rgb[ 2 ] = getF4( fp );
surf->color.eindex = getVX( fp );
break;
case ID_LUMI:
surf->luminosity.val = getF4( fp );
surf->luminosity.eindex = getVX( fp );
break;
case ID_DIFF:
surf->diffuse.val = getF4( fp );
surf->diffuse.eindex = getVX( fp );
break;
case ID_SPEC:
surf->specularity.val = getF4( fp );
surf->specularity.eindex = getVX( fp );
break;
case ID_GLOS:
surf->glossiness.val = getF4( fp );
surf->glossiness.eindex = getVX( fp );
break;
case ID_REFL:
surf->reflection.val.val = getF4( fp );
surf->reflection.val.eindex = getVX( fp );
break;
case ID_RFOP:
surf->reflection.options = getU2( fp );
break;
case ID_RIMG:
surf->reflection.cindex = getVX( fp );
break;
case ID_RSAN:
surf->reflection.seam_angle = getF4( fp );
break;
case ID_TRAN:
surf->transparency.val.val = getF4( fp );
surf->transparency.val.eindex = getVX( fp );
break;
case ID_TROP:
surf->transparency.options = getU2( fp );
break;
case ID_TIMG:
surf->transparency.cindex = getVX( fp );
break;
case ID_RIND:
surf->eta.val = getF4( fp );
surf->eta.eindex = getVX( fp );
break;
case ID_TRNL:
surf->translucency.val = getF4( fp );
surf->translucency.eindex = getVX( fp );
break;
case ID_BUMP:
surf->bump.val = getF4( fp );
surf->bump.eindex = getVX( fp );
break;
case ID_SMAN:
surf->smooth = getF4( fp );
break;
case ID_SIDE:
surf->sideflags = getU2( fp );
break;
case ID_CLRH:
surf->color_hilite.val = getF4( fp );
surf->color_hilite.eindex = getVX( fp );
break;
case ID_CLRF:
surf->color_filter.val = getF4( fp );
surf->color_filter.eindex = getVX( fp );
break;
case ID_ADTR:
surf->add_trans.val = getF4( fp );
surf->add_trans.eindex = getVX( fp );
break;
case ID_SHRP:
surf->dif_sharp.val = getF4( fp );
surf->dif_sharp.eindex = getVX( fp );
break;
case ID_GVAL:
surf->glow.val = getF4( fp );
surf->glow.eindex = getVX( fp );
break;
case ID_LINE:
surf->line.enabled = 1;
if ( sz >= 2 ) {
surf->line.flags = getU2( fp );
}
if ( sz >= 6 ) {
surf->line.size.val = getF4( fp );
}
if ( sz >= 8 ) {
surf->line.size.eindex = getVX( fp );
}
break;
case ID_ALPH:
surf->alpha_mode = getU2( fp );
surf->alpha = getF4( fp );
break;
case ID_AVAL:
surf->alpha = getF4( fp );
break;
case ID_BLOK:
type = getU4( fp );
switch ( type ) {
case ID_IMAP:
case ID_PROC:
case ID_GRAD:
tex = lwGetTexture( fp, sz - 4, type );
if ( !tex ) {
goto Fail;
}
if ( !add_texture( surf, tex ) ) {
lwFreeTexture( tex );
}
set_flen( 4 + get_flen() );
break;
case ID_SHDR:
shdr = lwGetShader( fp, sz - 4 );
if ( !shdr ) {
goto Fail;
}
lwListInsert( (void **) &surf->shader, shdr, (void *) compare_shaders );
++surf->nshaders;
set_flen( 4 + get_flen() );
break;
}
break;
default:
break;
}
/* error while reading current subchunk? */
rlen = get_flen();
if ( rlen < 0 || rlen > sz ) {
goto Fail;
}
/* skip unread parts of the current subchunk */
if ( rlen < sz ) {
_pico_memstream_seek( fp, sz - rlen, PICO_SEEK_CUR );
}
/* end of the SURF chunk? */
if ( cksize <= _pico_memstream_tell( fp ) - pos ) {
break;
}
/* get the next subchunk header */
set_flen( 0 );
id = getU4( fp );
sz = getU2( fp );
if ( 6 != get_flen() ) {
goto Fail;
}
}
return surf;
Fail:
if ( surf ) {
lwFreeSurface( surf );
}
return NULL;
}
int lwGetImageMap( picoMemStream_t *fp, int rsz, lwTexture *tex ){
unsigned int id;
unsigned short sz;
int rlen, pos;
pos = _pico_memstream_tell( fp );
id = getU4( fp );
sz = getU2( fp );
if ( 0 > get_flen() ) {
return 0;
}
while ( 1 ) {
sz += sz & 1;
set_flen( 0 );
switch ( id ) {
case ID_TMAP:
if ( !lwGetTMap( fp, sz, &tex->tmap ) ) {
return 0;
}
break;
case ID_PROJ:
tex->param.imap.projection = getU2( fp );
break;
case ID_VMAP:
tex->param.imap.vmap_name = getS0( fp );
break;
case ID_AXIS:
tex->param.imap.axis = getU2( fp );
break;
case ID_IMAG:
tex->param.imap.cindex = getVX( fp );
break;
case ID_WRAP:
tex->param.imap.wrapw_type = getU2( fp );
tex->param.imap.wraph_type = getU2( fp );
break;
case ID_WRPW:
tex->param.imap.wrapw.val = getF4( fp );
tex->param.imap.wrapw.eindex = getVX( fp );
break;
case ID_WRPH:
tex->param.imap.wraph.val = getF4( fp );
tex->param.imap.wraph.eindex = getVX( fp );
break;
case ID_AAST:
tex->param.imap.aas_flags = getU2( fp );
tex->param.imap.aa_strength = getF4( fp );
break;
case ID_PIXB:
tex->param.imap.pblend = getU2( fp );
break;
case ID_STCK:
tex->param.imap.stck.val = getF4( fp );
tex->param.imap.stck.eindex = getVX( fp );
break;
case ID_TAMP:
tex->param.imap.amplitude.val = getF4( fp );
tex->param.imap.amplitude.eindex = getVX( fp );
break;
default:
break;
}
/* error while reading the current subchunk? */
rlen = get_flen();
if ( rlen < 0 || rlen > sz ) {
return 0;
}
/* skip unread parts of the current subchunk */
if ( rlen < sz ) {
_pico_memstream_seek( fp, sz - rlen, PICO_SEEK_CUR );
}
/* end of the image map? */
if ( rsz <= _pico_memstream_tell( fp ) - pos ) {
break;
}
/* get the next subchunk header */
set_flen( 0 );
id = getU4( fp );
sz = getU2( fp );
if ( 6 != get_flen() ) {
return 0;
}
}
set_flen( _pico_memstream_tell( fp ) - pos );
return 1;
}
int lwGetTMap( picoMemStream_t *fp, int tmapsz, lwTMap *tmap ){
unsigned int id;
unsigned short sz;
int rlen, pos, i;
pos = _pico_memstream_tell( fp );
id = getU4( fp );
sz = getU2( fp );
if ( 0 > get_flen() ) {
return 0;
}
while ( 1 ) {
sz += sz & 1;
set_flen( 0 );
switch ( id ) {
case ID_SIZE:
for ( i = 0; i < 3; i++ )
tmap->size.val[ i ] = getF4( fp );
tmap->size.eindex = getVX( fp );
break;
case ID_CNTR:
for ( i = 0; i < 3; i++ )
tmap->center.val[ i ] = getF4( fp );
tmap->center.eindex = getVX( fp );
break;
case ID_ROTA:
for ( i = 0; i < 3; i++ )
tmap->rotate.val[ i ] = getF4( fp );
tmap->rotate.eindex = getVX( fp );
break;
case ID_FALL:
tmap->fall_type = getU2( fp );
for ( i = 0; i < 3; i++ )
tmap->falloff.val[ i ] = getF4( fp );
tmap->falloff.eindex = getVX( fp );
break;
case ID_OREF:
tmap->ref_object = getS0( fp );
break;
case ID_CSYS:
tmap->coord_sys = getU2( fp );
break;
default:
break;
}
/* error while reading the current subchunk? */
rlen = get_flen();
if ( rlen < 0 || rlen > sz ) {
return 0;
}
/* skip unread parts of the current subchunk */
if ( rlen < sz ) {
_pico_memstream_seek( fp, sz - rlen, PICO_SEEK_CUR );
}
/* end of the TMAP subchunk? */
if ( tmapsz <= _pico_memstream_tell( fp ) - pos ) {
break;
}
/* get the next subchunk header */
set_flen( 0 );
id = getU4( fp );
sz = getU2( fp );
if ( 6 != get_flen() ) {
return 0;
}
}
set_flen( _pico_memstream_tell( fp ) - pos );
return 1;
}
int lwGetTHeader( picoMemStream_t *fp, int hsz, lwTexture *tex ){
unsigned int id;
unsigned short sz;
int pos, rlen;
/* remember where we started */
set_flen( 0 );
pos = _pico_memstream_tell( fp );
/* ordinal string */
tex->ord = getS0( fp );
/* first subchunk header */
id = getU4( fp );
sz = getU2( fp );
if ( 0 > get_flen() ) {
return 0;
}
/* process subchunks as they're encountered */
while ( 1 ) {
sz += sz & 1;
set_flen( 0 );
switch ( id ) {
case ID_CHAN:
tex->chan = getU4( fp );
break;
case ID_OPAC:
tex->opac_type = getU2( fp );
tex->opacity.val = getF4( fp );
tex->opacity.eindex = getVX( fp );
break;
case ID_ENAB:
tex->enabled = getU2( fp );
break;
case ID_NEGA:
tex->negative = getU2( fp );
break;
case ID_AXIS:
tex->axis = getU2( fp );
break;
default:
break;
}
/* error while reading current subchunk? */
rlen = get_flen();
if ( rlen < 0 || rlen > sz ) {
return 0;
}
/* skip unread parts of the current subchunk */
if ( rlen < sz ) {
_pico_memstream_seek( fp, sz - rlen, PICO_SEEK_CUR );
}
/* end of the texture header subchunk? */
if ( hsz <= _pico_memstream_tell( fp ) - pos ) {
break;
}
/* get the next subchunk header */
set_flen( 0 );
id = getU4( fp );
sz = getU2( fp );
if ( 6 != get_flen() ) {
return 0;
}
}
set_flen( _pico_memstream_tell( fp ) - pos );
return 1;
}
lwEnvelope *lwGetEnvelope( FILE *fp, int cksize )
{
lwEnvelope *env;
lwKey *key;
lwPlugin *plug;
unsigned int id;
unsigned short sz;
float f[ 4 ];
int i, nparams, pos, rlen;
/* allocate the Envelope structure */
env = calloc( 1, sizeof( lwEnvelope ));
if ( !env ) goto Fail;
/* remember where we started */
set_flen( 0 );
pos = ftell( fp );
/* index */
env->index = getVX( fp );
/* first subchunk header */
id = getU4( fp );
sz = getU2( fp );
if ( 0 > get_flen() ) goto Fail;
/* process subchunks as they're encountered */
while ( 1 ) {
sz += sz & 1;
set_flen( 0 );
switch ( id ) {
case ID_TYPE:
env->type = getU2( fp );
break;
case ID_NAME:
env->name = getS0( fp );
break;
case ID_PRE:
env->behavior[ 0 ] = getU2( fp );
break;
case ID_POST:
env->behavior[ 1 ] = getU2( fp );
break;
case ID_KEY:
key = calloc( 1, sizeof( lwKey ));
if ( !key ) goto Fail;
key->time = getF4( fp );
key->value = getF4( fp );
lwListInsert( &env->key, key, compare_keys );
env->nkeys++;
break;
case ID_SPAN:
if ( !key ) goto Fail;
key->shape = getU4( fp );
nparams = ( sz - 4 ) / 4;
if ( nparams > 4 ) nparams = 4;
for ( i = 0; i < nparams; i++ )
f[ i ] = getF4( fp );
switch ( key->shape ) {
case ID_TCB:
key->tension = f[ 0 ];
key->continuity = f[ 1 ];
key->bias = f[ 2 ];
break;
case ID_BEZI:
case ID_HERM:
case ID_BEZ2:
for ( i = 0; i < nparams; i++ )
key->param[ i ] = f[ i ];
break;
}
break;
case ID_CHAN:
plug = calloc( 1, sizeof( lwPlugin ));
if ( !plug ) goto Fail;
plug->name = getS0( fp );
plug->flags = getU2( fp );
plug->data = getbytes( fp, sz - get_flen() );
lwListAdd( &env->cfilter, plug );
env->ncfilters++;
break;
default:
break;
}
/* error while reading current subchunk? */
rlen = get_flen();
if ( rlen < 0 || rlen > sz ) goto Fail;
/* skip unread parts of the current subchunk */
if ( rlen < sz )
fseek( fp, sz - rlen, SEEK_CUR );
/* end of the ENVL chunk? */
rlen = ftell( fp ) - pos;
if ( cksize < rlen ) goto Fail;
if ( cksize == rlen ) break;
/* get the next subchunk header */
set_flen( 0 );
id = getU4( fp );
sz = getU2( fp );
if ( 6 != get_flen() ) goto Fail;
}
return env;
Fail:
lwFreeEnvelope( env );
return NULL;
}
lwClip *lwGetClip( FILE *fp, int cksize )
{
lwClip *clip;
lwPlugin *filt;
unsigned int id;
unsigned short sz;
int pos, rlen;
/* allocate the Clip structure */
clip = calloc( 1, sizeof( lwClip ));
if ( !clip ) goto Fail;
clip->contrast.val = 1.0f;
clip->brightness.val = 1.0f;
clip->saturation.val = 1.0f;
clip->gamma.val = 1.0f;
/* remember where we started */
set_flen( 0 );
pos = ftell( fp );
/* index */
clip->index = getI4( fp );
/* first subchunk header */
clip->type = getU4( fp );
sz = getU2( fp );
if ( 0 > get_flen() ) goto Fail;
sz += sz & 1;
set_flen( 0 );
switch ( clip->type ) {
case ID_STIL:
clip->source.still.name = getS0( fp );
break;
case ID_ISEQ:
clip->source.seq.digits = getU1( fp );
clip->source.seq.flags = getU1( fp );
clip->source.seq.offset = getI2( fp );
getU2( fp ); /* Legacy Cruft: Nothing to see here */
clip->source.seq.start = getI2( fp );
clip->source.seq.end = getI2( fp );
clip->source.seq.prefix = getS0( fp );
clip->source.seq.suffix = getS0( fp );
break;
case ID_ANIM:
clip->source.anim.name = getS0( fp );
clip->source.anim.server = getS0( fp );
rlen = get_flen();
clip->source.anim.data = getbytes( fp, sz - rlen );
break;
case ID_XREF:
clip->source.xref.index = getI4( fp );
clip->source.xref.string = getS0( fp );
break;
case ID_STCC:
clip->source.cycle.lo = getI2( fp );
clip->source.cycle.hi = getI2( fp );
clip->source.cycle.name = getS0( fp );
break;
default:
break;
}
/* error while reading current subchunk? */
rlen = get_flen();
if ( rlen < 0 || rlen > sz ) goto Fail;
/* skip unread parts of the current subchunk */
if ( rlen < sz )
fseek( fp, sz - rlen, SEEK_CUR );
/* end of the CLIP chunk? */
rlen = ftell( fp ) - pos;
if ( cksize < rlen ) goto Fail;
if ( cksize == rlen )
return clip;
/* process subchunks as they're encountered */
id = getU4( fp );
sz = getU2( fp );
if ( 0 > get_flen() ) goto Fail;
while ( 1 ) {
sz += sz & 1;
set_flen( 0 );
switch ( id ) {
case ID_TIME:
clip->start_time = getF4( fp );
clip->duration = getF4( fp );
clip->frame_rate = getF4( fp );
break;
case ID_CONT:
clip->contrast.val = getF4( fp );
clip->contrast.eindex = getVX( fp );
break;
case ID_BRIT:
clip->brightness.val = getF4( fp );
clip->brightness.eindex = getVX( fp );
break;
case ID_SATR:
clip->saturation.val = getF4( fp );
clip->saturation.eindex = getVX( fp );
break;
case ID_HUE:
clip->hue.val = getF4( fp );
clip->hue.eindex = getVX( fp );
break;
case ID_GAMM:
clip->gamma.val = getF4( fp );
clip->gamma.eindex = getVX( fp );
break;
case ID_NEGA:
clip->negative = getU2( fp );
break;
case ID_IFLT:
case ID_PFLT:
filt = calloc( 1, sizeof( lwPlugin ));
if ( !filt ) goto Fail;
filt->name = getS0( fp );
filt->flags = getU2( fp );
rlen = get_flen();
filt->data = getbytes( fp, sz - rlen );
if ( id == ID_IFLT ) {
lwListAdd( &clip->ifilter, filt );
clip->nifilters++;
}
else {
lwListAdd( &clip->pfilter, filt );
clip->npfilters++;
}
break;
default:
break;
}
/* error while reading current subchunk? */
rlen = get_flen();
if ( rlen < 0 || rlen > sz ) goto Fail;
/* skip unread parts of the current subchunk */
if ( rlen < sz )
fseek( fp, sz - rlen, SEEK_CUR );
/* end of the CLIP chunk? */
rlen = ftell( fp ) - pos;
if ( cksize < rlen ) goto Fail;
if ( cksize == rlen ) break;
/* get the next chunk header */
set_flen( 0 );
id = getU4( fp );
sz = getU2( fp );
if ( 6 != get_flen() ) goto Fail;
}
return clip;
Fail:
lwFreeClip( clip );
return NULL;
}
