lwPlugin *lwGetShader( picoMemStream_t *fp, int bloksz ){
lwPlugin *shdr;
unsigned int id;
unsigned short sz;
int hsz, rlen, pos;
shdr = _pico_calloc( 1, sizeof( lwPlugin ) );
if ( !shdr ) {
return NULL;
}
pos = _pico_memstream_tell( fp );
set_flen( 0 );
hsz = getU2( fp );
shdr->ord = getS0( fp );
id = getU4( fp );
sz = getU2( fp );
if ( 0 > get_flen() ) {
goto Fail;
}
while ( hsz > 0 ) {
sz += sz & 1;
hsz -= sz;
if ( id == ID_ENAB ) {
shdr->flags = getU2( fp );
break;
}
else {
_pico_memstream_seek( fp, sz, PICO_SEEK_CUR );
id = getU4( fp );
sz = getU2( fp );
}
}
id = getU4( fp );
sz = getU2( fp );
if ( 0 > get_flen() ) {
goto Fail;
}
while ( 1 ) {
sz += sz & 1;
set_flen( 0 );
switch ( id ) {
case ID_FUNC:
shdr->name = getS0( fp );
rlen = get_flen();
shdr->data = getbytes( fp, sz - rlen );
break;
default:
break;
}
/* error while reading the 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 shader block? */
if ( bloksz <= _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;
}
}
set_flen( _pico_memstream_tell( fp ) - pos );
return shdr;
Fail:
lwFreePlugin( shdr );
return NULL;
}
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 lwGetProcedural( 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_AXIS:
tex->param.proc.axis = getU2( fp );
break;
case ID_VALU:
tex->param.proc.value[ 0 ] = getF4( fp );
if ( sz >= 8 ) {
tex->param.proc.value[ 1 ] = getF4( fp );
}
if ( sz >= 12 ) {
tex->param.proc.value[ 2 ] = getF4( fp );
}
break;
case ID_FUNC:
tex->param.proc.name = getS0( fp );
rlen = get_flen();
tex->param.proc.data = getbytes( fp, sz - rlen );
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 procedural block? */
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 lwGetGradient( picoMemStream_t *fp, int rsz, lwTexture *tex ){
unsigned int id;
unsigned short sz;
int rlen, pos, i, j, nkeys;
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_PNAM:
tex->param.grad.paramname = getS0( fp );
break;
case ID_INAM:
tex->param.grad.itemname = getS0( fp );
break;
case ID_GRST:
tex->param.grad.start = getF4( fp );
break;
case ID_GREN:
tex->param.grad.end = getF4( fp );
break;
case ID_GRPT:
tex->param.grad.repeat = getU2( fp );
break;
case ID_FKEY:
nkeys = sz / sizeof( lwGradKey );
tex->param.grad.key = _pico_calloc( nkeys, sizeof( lwGradKey ) );
if ( !tex->param.grad.key ) {
return 0;
}
for ( i = 0; i < nkeys; i++ ) {
tex->param.grad.key[ i ].value = getF4( fp );
for ( j = 0; j < 4; j++ )
tex->param.grad.key[ i ].rgba[ j ] = getF4( fp );
}
break;
case ID_IKEY:
nkeys = sz / 2;
tex->param.grad.ikey = _pico_calloc( nkeys, sizeof( short ) );
if ( !tex->param.grad.ikey ) {
return 0;
}
for ( i = 0; i < nkeys; i++ )
tex->param.grad.ikey[ i ] = 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 gradient? */
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 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 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;
}
lwSurface *lwGetSurface5( picoMemStream_t *fp, int cksize, lwObject *obj )
{
lwSurface *surf;
lwTexture *tex;
lwPlugin *shdr;
char *s;
float v[ 3 ];
unsigned int id, flags;
unsigned short sz;
int pos, rlen, i;
tex = NULL;
shdr = NULL;
/* 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 );
/* name */
surf->name = 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 ] = getU1( fp ) / 255.0f;
surf->color.rgb[ 1 ] = getU1( fp ) / 255.0f;
surf->color.rgb[ 2 ] = getU1( fp ) / 255.0f;
break;
case ID_FLAG:
flags = getU2( fp );
if ( flags & 4 ) surf->smooth = 1.56207f;
if ( flags & 8 ) surf->color_hilite.val = 1.0f;
if ( flags & 16 ) surf->color_filter.val = 1.0f;
if ( flags & 128 ) surf->dif_sharp.val = 0.5f;
if ( flags & 256 ) surf->sideflags = 3;
if ( flags & 512 ) surf->add_trans.val = 1.0f;
break;
case ID_LUMI:
surf->luminosity.val = getI2( fp ) / 256.0f;
break;
case ID_VLUM:
surf->luminosity.val = getF4( fp );
break;
case ID_DIFF:
surf->diffuse.val = getI2( fp ) / 256.0f;
break;
case ID_VDIF:
surf->diffuse.val = getF4( fp );
break;
case ID_SPEC:
surf->specularity.val = getI2( fp ) / 256.0f;
break;
case ID_VSPC:
surf->specularity.val = getF4( fp );
break;
case ID_GLOS:
surf->glossiness.val = ( float ) log( getU2( fp )) / 20.7944f;
break;
case ID_SMAN:
surf->smooth = getF4( fp );
break;
case ID_REFL:
surf->reflection.val.val = getI2( fp ) / 256.0f;
break;
case ID_RFLT:
surf->reflection.options = getU2( fp );
break;
case ID_RIMG:
s = getS0( fp );
surf->reflection.cindex = add_clip( s, &obj->clip, &obj->nclips );
surf->reflection.options = 3;
break;
case ID_RSAN:
surf->reflection.seam_angle = getF4( fp );
break;
case ID_TRAN:
surf->transparency.val.val = getI2( fp ) / 256.0f;
break;
case ID_RIND:
surf->eta.val = getF4( fp );
break;
case ID_BTEX:
s = getbytes( fp, sz );
tex = get_texture( s );
lwListAdd( (void *) &surf->bump.tex, tex );
break;
case ID_CTEX:
s = getbytes( fp, sz );
tex = get_texture( s );
lwListAdd( (void *) &surf->color.tex, tex );
break;
case ID_DTEX:
s = getbytes( fp, sz );
tex = get_texture( s );
lwListAdd( (void *) &surf->diffuse.tex, tex );
break;
case ID_LTEX:
s = getbytes( fp, sz );
tex = get_texture( s );
lwListAdd( (void *) &surf->luminosity.tex, tex );
break;
case ID_RTEX:
s = getbytes( fp, sz );
tex = get_texture( s );
lwListAdd( (void *) &surf->reflection.val.tex, tex );
break;
case ID_STEX:
s = getbytes( fp, sz );
tex = get_texture( s );
lwListAdd( (void *) &surf->specularity.tex, tex );
break;
case ID_TTEX:
s = getbytes( fp, sz );
tex = get_texture( s );
lwListAdd( (void *) &surf->transparency.val.tex, tex );
break;
case ID_TFLG:
flags = getU2( fp );
i = 0; // greebo: initialise to fix compiler warnings
if ( flags & 1 ) i = 0;
if ( flags & 2 ) i = 1;
if ( flags & 4 ) i = 2;
tex->axis = i;
if ( tex->type == ID_IMAP )
tex->param.imap.axis = i;
else
tex->param.proc.axis = i;
if ( flags & 8 ) tex->tmap.coord_sys = 1;
if ( flags & 16 ) tex->negative = 1;
if ( flags & 32 ) tex->param.imap.pblend = 1;
if ( flags & 64 ) {
tex->param.imap.aa_strength = 1.0f;
tex->param.imap.aas_flags = 1;
}
break;
case ID_TSIZ:
for ( i = 0; i < 3; i++ )
tex->tmap.size.val[ i ] = getF4( fp );
break;
case ID_TCTR:
for ( i = 0; i < 3; i++ )
tex->tmap.center.val[ i ] = getF4( fp );
break;
case ID_TFAL:
for ( i = 0; i < 3; i++ )
tex->tmap.falloff.val[ i ] = getF4( fp );
break;
case ID_TVEL:
for ( i = 0; i < 3; i++ )
v[ i ] = getF4( fp );
tex->tmap.center.eindex = add_tvel( tex->tmap.center.val, v,
&obj->env, &obj->nenvs );
break;
case ID_TCLR:
if ( tex->type == ID_PROC )
for ( i = 0; i < 3; i++ )
tex->param.proc.value[ i ] = getU1( fp ) / 255.0f;
break;
case ID_TVAL:
tex->param.proc.value[ 0 ] = getI2( fp ) / 256.0f;
break;
case ID_TAMP:
if ( tex->type == ID_IMAP )
tex->param.imap.amplitude.val = getF4( fp );
break;
case ID_TIMG:
s = getS0( fp );
tex->param.imap.cindex = add_clip( s, &obj->clip, &obj->nclips );
break;
case ID_TAAS:
tex->param.imap.aa_strength = getF4( fp );
tex->param.imap.aas_flags = 1;
break;
case ID_TREF:
tex->tmap.ref_object = getbytes( fp, sz );
break;
case ID_TOPC:
tex->opacity.val = getF4( fp );
break;
case ID_TFP0:
if ( tex->type == ID_IMAP )
tex->param.imap.wrapw.val = getF4( fp );
break;
case ID_TFP1:
if ( tex->type == ID_IMAP )
tex->param.imap.wraph.val = getF4( fp );
break;
case ID_SHDR:
shdr = _pico_calloc( 1, sizeof( lwPlugin ));
if ( !shdr ) goto Fail;
shdr->name = getbytes( fp, sz );
lwListAdd( (void *) &surf->shader, shdr );
surf->nshaders++;
break;
case ID_SDAT:
shdr->data = getbytes( fp, sz );
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;
}
lwObject *lwGetObject( char *filename, unsigned int *failID, int *failpos )
{
FILE *fp = NULL;
lwObject *object;
lwLayer *layer;
lwNode *node;
unsigned int id, formsize, type, cksize;
int i, rlen;
/* open the file */
fp = fopen( filename, "rb" );
if ( !fp ) return NULL;
/* read the first 12 bytes */
set_flen( 0 );
id = getU4( fp );
formsize = getU4( fp );
type = getU4( fp );
if ( 12 != get_flen() ) {
fclose( fp );
return NULL;
}
/* is this a LW object? */
if ( id != ID_FORM ) {
fclose( fp );
if ( failpos ) *failpos = 12;
return NULL;
}
if ( type != ID_LWO2 ) {
fclose( fp );
if ( type == ID_LWOB )
return lwGetObject5( filename, failID, failpos );
else {
if ( failpos ) *failpos = 12;
return NULL;
}
}
/* allocate an object and a default layer */
object = calloc( 1, sizeof( lwObject ));
if ( !object ) goto Fail;
layer = calloc( 1, sizeof( lwLayer ));
if ( !layer ) goto Fail;
object->layer = layer;
/* get the first chunk header */
id = getU4( fp );
cksize = getU4( fp );
if ( 0 > get_flen() ) goto Fail;
/* process chunks as they're encountered */
while ( 1 ) {
cksize += cksize & 1;
switch ( id )
{
case ID_LAYR:
if ( object->nlayers > 0 ) {
layer = calloc( 1, sizeof( lwLayer ));
if ( !layer ) goto Fail;
lwListAdd( &object->layer, layer );
}
object->nlayers++;
set_flen( 0 );
layer->index = getU2( fp );
layer->flags = getU2( fp );
layer->pivot[ 0 ] = getF4( fp );
layer->pivot[ 1 ] = getF4( fp );
layer->pivot[ 2 ] = getF4( fp );
layer->name = getS0( fp );
rlen = get_flen();
if ( rlen < 0 || rlen > cksize ) goto Fail;
if ( rlen <= cksize - 2 )
layer->parent = getU2( fp );
if ( rlen < cksize )
fseek( fp, cksize - rlen, SEEK_CUR );
break;
case ID_PNTS:
if ( !lwGetPoints( fp, cksize, &layer->point ))
goto Fail;
break;
case ID_POLS:
if ( !lwGetPolygons( fp, cksize, &layer->polygon,
layer->point.offset ))
goto Fail;
break;
case ID_VMAP:
case ID_VMAD:
node = ( lwNode * ) lwGetVMap( fp, cksize, layer->point.offset,
layer->polygon.offset, id == ID_VMAD );
if ( !node ) goto Fail;
lwListAdd( &layer->vmap, node );
layer->nvmaps++;
break;
case ID_PTAG:
if ( !lwGetPolygonTags( fp, cksize, &object->taglist,
&layer->polygon ))
goto Fail;
break;
case ID_BBOX:
set_flen( 0 );
for ( i = 0; i < 6; i++ )
layer->bbox[ i ] = getF4( fp );
rlen = get_flen();
if ( rlen < 0 || rlen > cksize ) goto Fail;
if ( rlen < cksize )
fseek( fp, cksize - rlen, SEEK_CUR );
break;
case ID_TAGS:
if ( !lwGetTags( fp, cksize, &object->taglist ))
goto Fail;
break;
case ID_ENVL:
node = ( lwNode * ) lwGetEnvelope( fp, cksize );
if ( !node ) goto Fail;
lwListAdd( &object->env, node );
object->nenvs++;
break;
case ID_CLIP:
node = ( lwNode * ) lwGetClip( fp, cksize );
if ( !node ) goto Fail;
lwListAdd( &object->clip, node );
object->nclips++;
break;
case ID_SURF:
node = ( lwNode * ) lwGetSurface( fp, cksize );
if ( !node ) goto Fail;
lwListAdd( &object->surf, node );
object->nsurfs++;
break;
case ID_DESC:
case ID_TEXT:
case ID_ICON:
default:
fseek( fp, cksize, SEEK_CUR );
break;
}
/* end of the file? */
if ( formsize <= ftell( fp ) - 8 ) break;
/* get the next chunk header */
set_flen( 0 );
id = getU4( fp );
cksize = getU4( fp );
if ( 8 != get_flen() ) goto Fail;
}
fclose( fp );
fp = NULL;
if ( object->nlayers == 0 )
object->nlayers = 1;
layer = object->layer;
while ( layer ) {
lwGetBoundingBox( &layer->point, layer->bbox );
lwGetPolyNormals( &layer->point, &layer->polygon );
if ( !lwGetPointPolygons( &layer->point, &layer->polygon )) goto Fail;
if ( !lwResolvePolySurfaces( &layer->polygon, &object->taglist,
&object->surf, &object->nsurfs )) goto Fail;
lwGetVertNormals( &layer->point, &layer->polygon );
if ( !lwGetPointVMaps( &layer->point, layer->vmap )) goto Fail;
if ( !lwGetPolyVMaps( &layer->polygon, layer->vmap )) goto Fail;
layer = layer->next;
}
return object;
Fail:
if ( failID ) *failID = id;
if ( fp ) {
if ( failpos ) *failpos = ftell( fp );
fclose( fp );
}
lwFreeObject( object );
return NULL;
}
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;
}