示例#1
0
static int add_clip( char *s, lwClip **clist, int *nclips )
{
   lwClip *clip;
   char *p;

   clip = _pico_calloc( 1, sizeof( lwClip ));
   if ( !clip ) return 0;

   clip->contrast.val = 1.0f;
   clip->brightness.val = 1.0f;
   clip->saturation.val = 1.0f;
   clip->gamma.val = 1.0f;

   if ( (p = strstr( s, "(sequence)" ))) {
      p[ -1 ] = 0;
      clip->type = ID_ISEQ;
      clip->source.seq.prefix = s;
      clip->source.seq.digits = 3;
   }
   else {
      clip->type = ID_STIL;
      clip->source.still.name = s;
   }

   (*nclips)++;
   clip->index = *nclips;

   lwListAdd( (void *) clist, clip );

   return clip->index;
}
示例#2
0
int lwResolvePolySurfaces( lwPolygonList *polygon, lwTagList *tlist,
						   lwSurface **surf, int *nsurfs ){
	lwSurface **s, *st;
	int i, index;

	if ( tlist->count == 0 ) {
		return 1;
	}

	s = _pico_calloc( tlist->count, sizeof( lwSurface * ) );
	if ( !s ) {
		return 0;
	}

	for ( i = 0; i < tlist->count; i++ ) {
		st = *surf;
		while ( st ) {
			if ( !strcmp( st->name, tlist->tag[ i ] ) ) {
				s[ i ] = st;
				break;
			}
			st = st->next;
		}
	}

	for ( i = 0; i < polygon->count; i++ ) {
		index = ( int ) ( (size_t)polygon->pol[ i ].surf );
		if ( index < 0 || index > tlist->count ) {
			return 0;
		}
		if ( !s[ index ] ) {
			s[ index ] = lwDefaultSurface();
			if ( !s[ index ] ) {
				return 0;
			}
			s[ index ]->name = _pico_alloc( strlen( tlist->tag[ index ] ) + 1 );
			if ( !s[ index ]->name ) {
				return 0;
			}
			strcpy( s[ index ]->name, tlist->tag[ index ] );
			lwListAdd( (void **) surf, s[ index ] );
			*nsurfs = *nsurfs + 1;
		}
		polygon->pol[ i ].surf = s[ index ];
	}

	_pico_free( s );
	return 1;
}
示例#3
0
static int add_tvel( float pos[], float vel[], lwEnvelope **elist, int *nenvs )
{
   lwEnvelope *env;
   lwKey *key0, *key1;
   int i;

   for ( i = 0; i < 3; i++ ) {
      env = _pico_calloc( 1, sizeof( lwEnvelope ));
      key0 = _pico_calloc( 1, sizeof( lwKey ));
      key1 = _pico_calloc( 1, sizeof( lwKey ));
      if ( !env || !key0 || !key1 ) return 0;

      key0->next = key1;
      key0->value = pos[ i ];
      key0->time = 0.0f;
      key1->prev = key0;
      key1->value = pos[ i ] + vel[ i ] * 30.0f;
      key1->time = 1.0f;
      key0->shape = key1->shape = ID_LINE;

      env->index = *nenvs + i + 1;
      env->type = 0x0301 + i;
      env->name = _pico_alloc( 11 );
      if ( env->name ) {
         strcpy( env->name, "Position.X" );
         env->name[ 9 ] += i;
      }
      env->key = key0;
      env->nkeys = 2;
      env->behavior[ 0 ] = BEH_LINEAR;
      env->behavior[ 1 ] = BEH_LINEAR;

      lwListAdd( (void *) elist, env );
   }

   *nenvs += 3;
   return env->index - 2;
}
示例#4
0
lwObject *lwGetObject5( char *filename, picoMemStream_t *fp, unsigned int *failID, int *failpos )
{
   lwObject *object;
   lwLayer *layer;
   lwNode *node;
   unsigned int id, formsize, type, cksize;


   /* open the file */

   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() ) {
      return NULL;
   }

   /* LWOB? */

   if ( id != ID_FORM || type != ID_LWOB ) {
      if ( failpos ) *failpos = 12;
      return NULL;
   }

   /* allocate an object and a default layer */

   object = _pico_calloc( 1, sizeof( lwObject ));
   if ( !object ) goto Fail;

   layer = _pico_calloc( 1, sizeof( lwLayer ));
   if ( !layer ) goto Fail;
   object->layer = layer;
   object->nlayers = 1;

   /* 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_PNTS:
            if ( !lwGetPoints( fp, cksize, &layer->point ))
               goto Fail;
            break;

         case ID_POLS:
            if ( !lwGetPolygons5( fp, cksize, &layer->polygon,
               layer->point.offset ))
               goto Fail;
            break;

         case ID_SRFS:
            if ( !lwGetTags( fp, cksize, &object->taglist ))
               goto Fail;
            break;

         case ID_SURF:
            node = ( lwNode * ) lwGetSurface5( fp, cksize, object );
            if ( !node ) goto Fail;
            lwListAdd( (void *) &object->surf, node );
            object->nsurfs++;
            break;

         default:
            _pico_memstream_seek( fp, cksize, PICO_SEEK_CUR );
            break;
      }

      /* end of the file? */

      if ( formsize <= _pico_memstream_tell( fp ) - 8 ) break;

      /* get the next chunk header */

      set_flen( 0 );
      id = getU4( fp );
      cksize = getU4( fp );
      if ( 8 != get_flen() ) goto Fail;
   }

   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 );

   return object;

Fail:
   if ( failID ) *failID = id;
   if ( fp ) {
      if ( failpos ) *failpos = _pico_memstream_tell( fp );
   }
   lwFreeObject( object );
   return NULL;
}
示例#5
0
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;
}
示例#6
0
文件: lwo2.c 项目: 2asoft/xray
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;
}
示例#7
0
文件: envelope.c 项目: 2asoft/xray
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;
}
示例#8
0
文件: clip.c 项目: DimondTheCat/xray
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;
}