-/*\r
-======================================================================\r
-lwob.c\r
-\r
-Functions for an LWOB reader. LWOB is the LightWave object format\r
-for versions of LW prior to 6.0.\r
-\r
-Ernie Wright 17 Sep 00\r
-====================================================================== */\r
-\r
-#include "../picointernal.h"\r
-#include "lwo2.h"\r
-\r
-/* disable warnings */\r
-#ifdef _WIN32\r
-#pragma warning( disable:4018 ) /* signed/unsigned mismatch */\r
-#endif\r
-\r
-\r
-/* IDs specific to LWOB */\r
-\r
-#define ID_SRFS LWID_('S','R','F','S')\r
-#define ID_FLAG LWID_('F','L','A','G')\r
-#define ID_VLUM LWID_('V','L','U','M')\r
-#define ID_VDIF LWID_('V','D','I','F')\r
-#define ID_VSPC LWID_('V','S','P','C')\r
-#define ID_RFLT LWID_('R','F','L','T')\r
-#define ID_BTEX LWID_('B','T','E','X')\r
-#define ID_CTEX LWID_('C','T','E','X')\r
-#define ID_DTEX LWID_('D','T','E','X')\r
-#define ID_LTEX LWID_('L','T','E','X')\r
-#define ID_RTEX LWID_('R','T','E','X')\r
-#define ID_STEX LWID_('S','T','E','X')\r
-#define ID_TTEX LWID_('T','T','E','X')\r
-#define ID_TFLG LWID_('T','F','L','G')\r
-#define ID_TSIZ LWID_('T','S','I','Z')\r
-#define ID_TCTR LWID_('T','C','T','R')\r
-#define ID_TFAL LWID_('T','F','A','L')\r
-#define ID_TVEL LWID_('T','V','E','L')\r
-#define ID_TCLR LWID_('T','C','L','R')\r
-#define ID_TVAL LWID_('T','V','A','L')\r
-#define ID_TAMP LWID_('T','A','M','P')\r
-#define ID_TIMG LWID_('T','I','M','G')\r
-#define ID_TAAS LWID_('T','A','A','S')\r
-#define ID_TREF LWID_('T','R','E','F')\r
-#define ID_TOPC LWID_('T','O','P','C')\r
-#define ID_SDAT LWID_('S','D','A','T')\r
-#define ID_TFP0 LWID_('T','F','P','0')\r
-#define ID_TFP1 LWID_('T','F','P','1')\r
-\r
-\r
-/*\r
-======================================================================\r
-add_clip()\r
-\r
-Add a clip to the clip list. Used to store the contents of an RIMG or\r
-TIMG surface subchunk.\r
-====================================================================== */\r
-\r
-static int add_clip( char *s, lwClip **clist, int *nclips )\r
-{\r
- lwClip *clip;\r
- char *p;\r
-\r
- clip = _pico_calloc( 1, sizeof( lwClip ));\r
- if ( !clip ) return 0;\r
-\r
- clip->contrast.val = 1.0f;\r
- clip->brightness.val = 1.0f;\r
- clip->saturation.val = 1.0f;\r
- clip->gamma.val = 1.0f;\r
-\r
- if ( p = strstr( s, "(sequence)" )) {\r
- p[ -1 ] = 0;\r
- clip->type = ID_ISEQ;\r
- clip->source.seq.prefix = s;\r
- clip->source.seq.digits = 3;\r
- }\r
- else {\r
- clip->type = ID_STIL;\r
- clip->source.still.name = s;\r
- }\r
-\r
- *nclips++;\r
- clip->index = *nclips;\r
-\r
- lwListAdd( clist, clip );\r
-\r
- return clip->index;\r
-}\r
-\r
-\r
-/*\r
-======================================================================\r
-add_tvel()\r
-\r
-Add a triple of envelopes to simulate the old texture velocity\r
-parameters.\r
-====================================================================== */\r
-\r
-static int add_tvel( float pos[], float vel[], lwEnvelope **elist, int *nenvs )\r
-{\r
- lwEnvelope *env;\r
- lwKey *key0, *key1;\r
- int i;\r
-\r
- for ( i = 0; i < 3; i++ ) {\r
- env = _pico_calloc( 1, sizeof( lwEnvelope ));\r
- key0 = _pico_calloc( 1, sizeof( lwKey ));\r
- key1 = _pico_calloc( 1, sizeof( lwKey ));\r
- if ( !env || !key0 || !key1 ) return 0;\r
-\r
- key0->next = key1;\r
- key0->value = pos[ i ];\r
- key0->time = 0.0f;\r
- key1->prev = key0;\r
- key1->value = pos[ i ] + vel[ i ] * 30.0f;\r
- key1->time = 1.0f;\r
- key0->shape = key1->shape = ID_LINE;\r
-\r
- env->index = *nenvs + i + 1;\r
- env->type = 0x0301 + i;\r
- env->name = _pico_alloc( 11 );\r
- if ( env->name ) {\r
- strcpy( env->name, "Position.X" );\r
- env->name[ 9 ] += i;\r
- }\r
- env->key = key0;\r
- env->nkeys = 2;\r
- env->behavior[ 0 ] = BEH_LINEAR;\r
- env->behavior[ 1 ] = BEH_LINEAR;\r
-\r
- lwListAdd( elist, env );\r
- }\r
-\r
- *nenvs += 3;\r
- return env->index - 2;\r
-}\r
-\r
-\r
-/*\r
-======================================================================\r
-get_texture()\r
-\r
-Create a new texture for BTEX, CTEX, etc. subchunks.\r
-====================================================================== */\r
-\r
-static lwTexture *get_texture( char *s )\r
-{\r
- lwTexture *tex;\r
-\r
- tex = _pico_calloc( 1, sizeof( lwTexture ));\r
- if ( !tex ) return NULL;\r
-\r
- tex->tmap.size.val[ 0 ] =\r
- tex->tmap.size.val[ 1 ] =\r
- tex->tmap.size.val[ 2 ] = 1.0f;\r
- tex->opacity.val = 1.0f;\r
- tex->enabled = 1;\r
-\r
- if ( strstr( s, "Image Map" )) {\r
- tex->type = ID_IMAP;\r
- if ( strstr( s, "Planar" )) tex->param.imap.projection = 0;\r
- else if ( strstr( s, "Cylindrical" )) tex->param.imap.projection = 1;\r
- else if ( strstr( s, "Spherical" )) tex->param.imap.projection = 2;\r
- else if ( strstr( s, "Cubic" )) tex->param.imap.projection = 3;\r
- else if ( strstr( s, "Front" )) tex->param.imap.projection = 4;\r
- tex->param.imap.aa_strength = 1.0f;\r
- tex->param.imap.amplitude.val = 1.0f;\r
- _pico_free( s );\r
- }\r
- else {\r
- tex->type = ID_PROC;\r
- tex->param.proc.name = s;\r
- }\r
-\r
- return tex;\r
-}\r
-\r
-\r
-/*\r
-======================================================================\r
-lwGetSurface5()\r
-\r
-Read an lwSurface from an LWOB file.\r
-====================================================================== */\r
-\r
-lwSurface *lwGetSurface5( picoMemStream_t *fp, int cksize, lwObject *obj )\r
-{\r
- lwSurface *surf;\r
- lwTexture *tex;\r
- lwPlugin *shdr;\r
- char *s;\r
- float v[ 3 ];\r
- unsigned int id, flags;\r
- unsigned short sz;\r
- int pos, rlen, i;\r
-\r
-\r
- /* allocate the Surface structure */\r
-\r
- surf = _pico_calloc( 1, sizeof( lwSurface ));\r
- if ( !surf ) goto Fail;\r
-\r
- /* non-zero defaults */\r
-\r
- surf->color.rgb[ 0 ] = 0.78431f;\r
- surf->color.rgb[ 1 ] = 0.78431f;\r
- surf->color.rgb[ 2 ] = 0.78431f;\r
- surf->diffuse.val = 1.0f;\r
- surf->glossiness.val = 0.4f;\r
- surf->bump.val = 1.0f;\r
- surf->eta.val = 1.0f;\r
- surf->sideflags = 1;\r
-\r
- /* remember where we started */\r
-\r
- set_flen( 0 );\r
- pos = _pico_memstream_tell( fp );\r
-\r
- /* name */\r
-\r
- surf->name = getS0( fp );\r
-\r
- /* first subchunk header */\r
-\r
- id = getU4( fp );\r
- sz = getU2( fp );\r
- if ( 0 > get_flen() ) goto Fail;\r
-\r
- /* process subchunks as they're encountered */\r
-\r
- while ( 1 ) {\r
- sz += sz & 1;\r
- set_flen( 0 );\r
-\r
- switch ( id ) {\r
- case ID_COLR:\r
- surf->color.rgb[ 0 ] = getU1( fp ) / 255.0f;\r
- surf->color.rgb[ 1 ] = getU1( fp ) / 255.0f;\r
- surf->color.rgb[ 2 ] = getU1( fp ) / 255.0f;\r
- break;\r
-\r
- case ID_FLAG:\r
- flags = getU2( fp );\r
- if ( flags & 4 ) surf->smooth = 1.56207f;\r
- if ( flags & 8 ) surf->color_hilite.val = 1.0f;\r
- if ( flags & 16 ) surf->color_filter.val = 1.0f;\r
- if ( flags & 128 ) surf->dif_sharp.val = 0.5f;\r
- if ( flags & 256 ) surf->sideflags = 3;\r
- if ( flags & 512 ) surf->add_trans.val = 1.0f;\r
- break;\r
-\r
- case ID_LUMI:\r
- surf->luminosity.val = getI2( fp ) / 256.0f;\r
- break;\r
-\r
- case ID_VLUM:\r
- surf->luminosity.val = getF4( fp );\r
- break;\r
-\r
- case ID_DIFF:\r
- surf->diffuse.val = getI2( fp ) / 256.0f;\r
- break;\r
-\r
- case ID_VDIF:\r
- surf->diffuse.val = getF4( fp );\r
- break;\r
-\r
- case ID_SPEC:\r
- surf->specularity.val = getI2( fp ) / 256.0f;\r
- break;\r
-\r
- case ID_VSPC:\r
- surf->specularity.val = getF4( fp );\r
- break;\r
-\r
- case ID_GLOS:\r
- surf->glossiness.val = ( float ) log( getU2( fp )) / 20.7944f;\r
- break;\r
-\r
- case ID_SMAN:\r
- surf->smooth = getF4( fp );\r
- break;\r
-\r
- case ID_REFL:\r
- surf->reflection.val.val = getI2( fp ) / 256.0f;\r
- break;\r
-\r
- case ID_RFLT:\r
- surf->reflection.options = getU2( fp );\r
- break;\r
-\r
- case ID_RIMG:\r
- s = getS0( fp );\r
- surf->reflection.cindex = add_clip( s, &obj->clip, &obj->nclips );\r
- surf->reflection.options = 3;\r
- break;\r
-\r
- case ID_RSAN:\r
- surf->reflection.seam_angle = getF4( fp );\r
- break;\r
-\r
- case ID_TRAN:\r
- surf->transparency.val.val = getI2( fp ) / 256.0f;\r
- break;\r
-\r
- case ID_RIND:\r
- surf->eta.val = getF4( fp );\r
- break;\r
-\r
- case ID_BTEX:\r
- s = getbytes( fp, sz );\r
- tex = get_texture( s );\r
- lwListAdd( &surf->bump.tex, tex );\r
- break;\r
-\r
- case ID_CTEX:\r
- s = getbytes( fp, sz );\r
- tex = get_texture( s );\r
- lwListAdd( &surf->color.tex, tex );\r
- break;\r
-\r
- case ID_DTEX:\r
- s = getbytes( fp, sz );\r
- tex = get_texture( s );\r
- lwListAdd( &surf->diffuse.tex, tex );\r
- break;\r
-\r
- case ID_LTEX:\r
- s = getbytes( fp, sz );\r
- tex = get_texture( s );\r
- lwListAdd( &surf->luminosity.tex, tex );\r
- break;\r
-\r
- case ID_RTEX:\r
- s = getbytes( fp, sz );\r
- tex = get_texture( s );\r
- lwListAdd( &surf->reflection.val.tex, tex );\r
- break;\r
-\r
- case ID_STEX:\r
- s = getbytes( fp, sz );\r
- tex = get_texture( s );\r
- lwListAdd( &surf->specularity.tex, tex );\r
- break;\r
-\r
- case ID_TTEX:\r
- s = getbytes( fp, sz );\r
- tex = get_texture( s );\r
- lwListAdd( &surf->transparency.val.tex, tex );\r
- break;\r
-\r
- case ID_TFLG:\r
- flags = getU2( fp );\r
-\r
- if ( flags & 1 ) i = 0;\r
- if ( flags & 2 ) i = 1;\r
- if ( flags & 4 ) i = 2;\r
- tex->axis = i;\r
- if ( tex->type == ID_IMAP )\r
- tex->param.imap.axis = i;\r
- else\r
- tex->param.proc.axis = i;\r
-\r
- if ( flags & 8 ) tex->tmap.coord_sys = 1;\r
- if ( flags & 16 ) tex->negative = 1;\r
- if ( flags & 32 ) tex->param.imap.pblend = 1;\r
- if ( flags & 64 ) {\r
- tex->param.imap.aa_strength = 1.0f;\r
- tex->param.imap.aas_flags = 1;\r
- }\r
- break;\r
-\r
- case ID_TSIZ:\r
- for ( i = 0; i < 3; i++ )\r
- tex->tmap.size.val[ i ] = getF4( fp );\r
- break;\r
-\r
- case ID_TCTR:\r
- for ( i = 0; i < 3; i++ )\r
- tex->tmap.center.val[ i ] = getF4( fp );\r
- break;\r
-\r
- case ID_TFAL:\r
- for ( i = 0; i < 3; i++ )\r
- tex->tmap.falloff.val[ i ] = getF4( fp );\r
- break;\r
-\r
- case ID_TVEL:\r
- for ( i = 0; i < 3; i++ )\r
- v[ i ] = getF4( fp );\r
- tex->tmap.center.eindex = add_tvel( tex->tmap.center.val, v,\r
- &obj->env, &obj->nenvs );\r
- break;\r
-\r
- case ID_TCLR:\r
- if ( tex->type == ID_PROC )\r
- for ( i = 0; i < 3; i++ )\r
- tex->param.proc.value[ i ] = getU1( fp ) / 255.0f;\r
- break;\r
-\r
- case ID_TVAL:\r
- tex->param.proc.value[ 0 ] = getI2( fp ) / 256.0f;\r
- break;\r
-\r
- case ID_TAMP:\r
- if ( tex->type == ID_IMAP )\r
- tex->param.imap.amplitude.val = getF4( fp );\r
- break;\r
-\r
- case ID_TIMG:\r
- s = getS0( fp );\r
- tex->param.imap.cindex = add_clip( s, &obj->clip, &obj->nclips );\r
- break;\r
-\r
- case ID_TAAS:\r
- tex->param.imap.aa_strength = getF4( fp );\r
- tex->param.imap.aas_flags = 1;\r
- break;\r
-\r
- case ID_TREF:\r
- tex->tmap.ref_object = getbytes( fp, sz );\r
- break;\r
-\r
- case ID_TOPC:\r
- tex->opacity.val = getF4( fp );\r
- break;\r
-\r
- case ID_TFP0:\r
- if ( tex->type == ID_IMAP )\r
- tex->param.imap.wrapw.val = getF4( fp );\r
- break;\r
-\r
- case ID_TFP1:\r
- if ( tex->type == ID_IMAP )\r
- tex->param.imap.wraph.val = getF4( fp );\r
- break;\r
-\r
- case ID_SHDR:\r
- shdr = _pico_calloc( 1, sizeof( lwPlugin ));\r
- if ( !shdr ) goto Fail;\r
- shdr->name = getbytes( fp, sz );\r
- lwListAdd( &surf->shader, shdr );\r
- surf->nshaders++;\r
- break;\r
-\r
- case ID_SDAT:\r
- shdr->data = getbytes( fp, sz );\r
- break;\r
-\r
- default:\r
- break;\r
- }\r
-\r
- /* error while reading current subchunk? */\r
-\r
- rlen = get_flen();\r
- if ( rlen < 0 || rlen > sz ) goto Fail;\r
-\r
- /* skip unread parts of the current subchunk */\r
-\r
- if ( rlen < sz )\r
- _pico_memstream_seek( fp, sz - rlen, PICO_SEEK_CUR );\r
-\r
- /* end of the SURF chunk? */\r
-\r
- if ( cksize <= _pico_memstream_tell( fp ) - pos )\r
- break;\r
-\r
- /* get the next subchunk header */\r
-\r
- set_flen( 0 );\r
- id = getU4( fp );\r
- sz = getU2( fp );\r
- if ( 6 != get_flen() ) goto Fail;\r
- }\r
-\r
- return surf;\r
-\r
-Fail:\r
- if ( surf ) lwFreeSurface( surf );\r
- return NULL;\r
-}\r
-\r
-\r
-/*\r
-======================================================================\r
-lwGetPolygons5()\r
-\r
-Read polygon records from a POLS chunk in an LWOB file. The polygons\r
-are added to the array in the lwPolygonList.\r
-====================================================================== */\r
-\r
-int lwGetPolygons5( picoMemStream_t *fp, int cksize, lwPolygonList *plist, int ptoffset )\r
-{\r
- lwPolygon *pp;\r
- lwPolVert *pv;\r
- unsigned char *buf, *bp;\r
- int i, j, nv, nverts, npols;\r
-\r
-\r
- if ( cksize == 0 ) return 1;\r
-\r
- /* read the whole chunk */\r
-\r
- set_flen( 0 );\r
- buf = getbytes( fp, cksize );\r
- if ( !buf ) goto Fail;\r
-\r
- /* count the polygons and vertices */\r
-\r
- nverts = 0;\r
- npols = 0;\r
- bp = buf;\r
-\r
- while ( bp < buf + cksize ) {\r
- nv = sgetU2( &bp );\r
- nverts += nv;\r
- npols++;\r
- bp += 2 * nv;\r
- i = sgetI2( &bp );\r
- if ( i < 0 ) bp += 2; /* detail polygons */\r
- }\r
-\r
- if ( !lwAllocPolygons( plist, npols, nverts ))\r
- goto Fail;\r
-\r
- /* fill in the new polygons */\r
-\r
- bp = buf;\r
- pp = plist->pol + plist->offset;\r
- pv = plist->pol[ 0 ].v + plist->voffset;\r
-\r
- for ( i = 0; i < npols; i++ ) {\r
- nv = sgetU2( &bp );\r
-\r
- pp->nverts = nv;\r
- pp->type = ID_FACE;\r
- if ( !pp->v ) pp->v = pv;\r
- for ( j = 0; j < nv; j++ )\r
- pv[ j ].index = sgetU2( &bp ) + ptoffset;\r
- j = sgetI2( &bp );\r
- if ( j < 0 ) {\r
- j = -j;\r
- bp += 2;\r
- }\r
- j -= 1;\r
- pp->surf = ( lwSurface * ) j;\r
-\r
- pp++;\r
- pv += nv;\r
- }\r
-\r
- _pico_free( buf );\r
- return 1;\r
-\r
-Fail:\r
- if ( buf ) _pico_free( buf );\r
- lwFreePolygons( plist );\r
- return 0;\r
-}\r
-\r
-\r
-/*\r
-======================================================================\r
-getLWObject5()\r
-\r
-Returns the contents of an LWOB, given its filename, or NULL if the\r
-file couldn't be loaded. On failure, failID and failpos can be used\r
-to diagnose the cause.\r
-\r
-1. If the file isn't an LWOB, failpos will contain 12 and failID will\r
- be unchanged.\r
-\r
-2. If an error occurs while reading an LWOB, failID will contain the\r
- most recently read IFF chunk ID, and failpos will contain the\r
- value returned by _pico_memstream_tell() at the time of the failure.\r
-\r
-3. If the file couldn't be opened, or an error occurs while reading\r
- the first 12 bytes, both failID and failpos will be unchanged.\r
-\r
-If you don't need this information, failID and failpos can be NULL.\r
-====================================================================== */\r
-\r
-lwObject *lwGetObject5( char *filename, picoMemStream_t *fp, unsigned int *failID, int *failpos )\r
-{\r
- lwObject *object;\r
- lwLayer *layer;\r
- lwNode *node;\r
- unsigned int id, formsize, type, cksize;\r
-\r
-\r
- /* open the file */\r
-\r
- if ( !fp ) return NULL;\r
-\r
- /* read the first 12 bytes */\r
-\r
- set_flen( 0 );\r
- id = getU4( fp );\r
- formsize = getU4( fp );\r
- type = getU4( fp );\r
- if ( 12 != get_flen() ) {\r
- return NULL;\r
- }\r
-\r
- /* LWOB? */\r
-\r
- if ( id != ID_FORM || type != ID_LWOB ) {\r
- if ( failpos ) *failpos = 12;\r
- return NULL;\r
- }\r
-\r
- /* allocate an object and a default layer */\r
-\r
- object = _pico_calloc( 1, sizeof( lwObject ));\r
- if ( !object ) goto Fail;\r
-\r
- layer = _pico_calloc( 1, sizeof( lwLayer ));\r
- if ( !layer ) goto Fail;\r
- object->layer = layer;\r
- object->nlayers = 1;\r
-\r
- /* get the first chunk header */\r
-\r
- id = getU4( fp );\r
- cksize = getU4( fp );\r
- if ( 0 > get_flen() ) goto Fail;\r
-\r
- /* process chunks as they're encountered */\r
-\r
- while ( 1 ) {\r
- cksize += cksize & 1;\r
-\r
- switch ( id )\r
- {\r
- case ID_PNTS:\r
- if ( !lwGetPoints( fp, cksize, &layer->point ))\r
- goto Fail;\r
- break;\r
-\r
- case ID_POLS:\r
- if ( !lwGetPolygons5( fp, cksize, &layer->polygon,\r
- layer->point.offset ))\r
- goto Fail;\r
- break;\r
-\r
- case ID_SRFS:\r
- if ( !lwGetTags( fp, cksize, &object->taglist ))\r
- goto Fail;\r
- break;\r
-\r
- case ID_SURF:\r
- node = ( lwNode * ) lwGetSurface5( fp, cksize, object );\r
- if ( !node ) goto Fail;\r
- lwListAdd( &object->surf, node );\r
- object->nsurfs++;\r
- break;\r
-\r
- default:\r
- _pico_memstream_seek( fp, cksize, PICO_SEEK_CUR );\r
- break;\r
- }\r
-\r
- /* end of the file? */\r
-\r
- if ( formsize <= _pico_memstream_tell( fp ) - 8 ) break;\r
-\r
- /* get the next chunk header */\r
-\r
- set_flen( 0 );\r
- id = getU4( fp );\r
- cksize = getU4( fp );\r
- if ( 8 != get_flen() ) goto Fail;\r
- }\r
-\r
- lwGetBoundingBox( &layer->point, layer->bbox );\r
- lwGetPolyNormals( &layer->point, &layer->polygon );\r
- if ( !lwGetPointPolygons( &layer->point, &layer->polygon )) goto Fail;\r
- if ( !lwResolvePolySurfaces( &layer->polygon, &object->taglist,\r
- &object->surf, &object->nsurfs )) goto Fail;\r
- lwGetVertNormals( &layer->point, &layer->polygon );\r
-\r
- return object;\r
-\r
-Fail:\r
- if ( failID ) *failID = id;\r
- if ( fp ) {\r
- if ( failpos ) *failpos = _pico_memstream_tell( fp );\r
- }\r
- lwFreeObject( object );\r
- return NULL;\r
-}\r
-\r
-int lwValidateObject5( char *filename, picoMemStream_t *fp, unsigned int *failID, int *failpos )\r
-{\r
- unsigned int id, formsize, type;\r
-\r
-\r
- /* open the file */\r
-\r
- if ( !fp ) return PICO_PMV_ERROR_MEMORY;\r
-\r
- /* read the first 12 bytes */\r
-\r
- set_flen( 0 );\r
- id = getU4( fp );\r
- formsize = getU4( fp );\r
- type = getU4( fp );\r
- if ( 12 != get_flen() ) {\r
- return PICO_PMV_ERROR_SIZE;\r
- }\r
-\r
- /* LWOB? */\r
-\r
- if ( id != ID_FORM || type != ID_LWOB ) {\r
- if ( failpos ) *failpos = 12;\r
- return PICO_PMV_ERROR_IDENT;\r
- }\r
-\r
- return PICO_PMV_OK;\r
-}\r
+/*
+======================================================================
+lwob.c
+
+Functions for an LWOB reader. LWOB is the LightWave object format
+for versions of LW prior to 6.0.
+
+Ernie Wright 17 Sep 00
+====================================================================== */
+
+#include "../picointernal.h"
+#include "lwo2.h"
+
+/* disable warnings */
+#ifdef _WIN32
+#pragma warning( disable:4018 ) /* signed/unsigned mismatch */
+#endif
+
+
+/* IDs specific to LWOB */
+
+#define ID_SRFS LWID_('S','R','F','S')
+#define ID_FLAG LWID_('F','L','A','G')
+#define ID_VLUM LWID_('V','L','U','M')
+#define ID_VDIF LWID_('V','D','I','F')
+#define ID_VSPC LWID_('V','S','P','C')
+#define ID_RFLT LWID_('R','F','L','T')
+#define ID_BTEX LWID_('B','T','E','X')
+#define ID_CTEX LWID_('C','T','E','X')
+#define ID_DTEX LWID_('D','T','E','X')
+#define ID_LTEX LWID_('L','T','E','X')
+#define ID_RTEX LWID_('R','T','E','X')
+#define ID_STEX LWID_('S','T','E','X')
+#define ID_TTEX LWID_('T','T','E','X')
+#define ID_TFLG LWID_('T','F','L','G')
+#define ID_TSIZ LWID_('T','S','I','Z')
+#define ID_TCTR LWID_('T','C','T','R')
+#define ID_TFAL LWID_('T','F','A','L')
+#define ID_TVEL LWID_('T','V','E','L')
+#define ID_TCLR LWID_('T','C','L','R')
+#define ID_TVAL LWID_('T','V','A','L')
+#define ID_TAMP LWID_('T','A','M','P')
+#define ID_TIMG LWID_('T','I','M','G')
+#define ID_TAAS LWID_('T','A','A','S')
+#define ID_TREF LWID_('T','R','E','F')
+#define ID_TOPC LWID_('T','O','P','C')
+#define ID_SDAT LWID_('S','D','A','T')
+#define ID_TFP0 LWID_('T','F','P','0')
+#define ID_TFP1 LWID_('T','F','P','1')
+
+
+/*
+======================================================================
+add_clip()
+
+Add a clip to the clip list. Used to store the contents of an RIMG or
+TIMG surface subchunk.
+====================================================================== */
+
+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( clist, clip );
+
+ return clip->index;
+}
+
+
+/*
+======================================================================
+add_tvel()
+
+Add a triple of envelopes to simulate the old texture velocity
+parameters.
+====================================================================== */
+
+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( elist, env );
+ }
+
+ *nenvs += 3;
+ return env->index - 2;
+}
+
+
+/*
+======================================================================
+get_texture()
+
+Create a new texture for BTEX, CTEX, etc. subchunks.
+====================================================================== */
+
+static lwTexture *get_texture( char *s )
+{
+ lwTexture *tex;
+
+ tex = _pico_calloc( 1, sizeof( lwTexture ));
+ if ( !tex ) return NULL;
+
+ tex->tmap.size.val[ 0 ] =
+ tex->tmap.size.val[ 1 ] =
+ tex->tmap.size.val[ 2 ] = 1.0f;
+ tex->opacity.val = 1.0f;
+ tex->enabled = 1;
+
+ if ( strstr( s, "Image Map" )) {
+ tex->type = ID_IMAP;
+ if ( strstr( s, "Planar" )) tex->param.imap.projection = 0;
+ else if ( strstr( s, "Cylindrical" )) tex->param.imap.projection = 1;
+ else if ( strstr( s, "Spherical" )) tex->param.imap.projection = 2;
+ else if ( strstr( s, "Cubic" )) tex->param.imap.projection = 3;
+ else if ( strstr( s, "Front" )) tex->param.imap.projection = 4;
+ tex->param.imap.aa_strength = 1.0f;
+ tex->param.imap.amplitude.val = 1.0f;
+ _pico_free( s );
+ }
+ else {
+ tex->type = ID_PROC;
+ tex->param.proc.name = s;
+ }
+
+ return tex;
+}
+
+
+/*
+======================================================================
+lwGetSurface5()
+
+Read an lwSurface from an LWOB file.
+====================================================================== */
+
+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;
+
+
+ /* 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( &surf->bump.tex, tex );
+ break;
+
+ case ID_CTEX:
+ s = getbytes( fp, sz );
+ tex = get_texture( s );
+ lwListAdd( &surf->color.tex, tex );
+ break;
+
+ case ID_DTEX:
+ s = getbytes( fp, sz );
+ tex = get_texture( s );
+ lwListAdd( &surf->diffuse.tex, tex );
+ break;
+
+ case ID_LTEX:
+ s = getbytes( fp, sz );
+ tex = get_texture( s );
+ lwListAdd( &surf->luminosity.tex, tex );
+ break;
+
+ case ID_RTEX:
+ s = getbytes( fp, sz );
+ tex = get_texture( s );
+ lwListAdd( &surf->reflection.val.tex, tex );
+ break;
+
+ case ID_STEX:
+ s = getbytes( fp, sz );
+ tex = get_texture( s );
+ lwListAdd( &surf->specularity.tex, tex );
+ break;
+
+ case ID_TTEX:
+ s = getbytes( fp, sz );
+ tex = get_texture( s );
+ lwListAdd( &surf->transparency.val.tex, tex );
+ break;
+
+ case ID_TFLG:
+ flags = getU2( fp );
+
+ 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( &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;
+}
+
+
+/*
+======================================================================
+lwGetPolygons5()
+
+Read polygon records from a POLS chunk in an LWOB file. The polygons
+are added to the array in the lwPolygonList.
+====================================================================== */
+
+int lwGetPolygons5( picoMemStream_t *fp, int cksize, lwPolygonList *plist, int ptoffset )
+{
+ lwPolygon *pp;
+ lwPolVert *pv;
+ unsigned char *buf, *bp;
+ int i, j, nv, nverts, npols;
+
+
+ if ( cksize == 0 ) return 1;
+
+ /* read the whole chunk */
+
+ set_flen( 0 );
+ buf = getbytes( fp, cksize );
+ if ( !buf ) goto Fail;
+
+ /* count the polygons and vertices */
+
+ nverts = 0;
+ npols = 0;
+ bp = buf;
+
+ while ( bp < buf + cksize ) {
+ nv = sgetU2( &bp );
+ nverts += nv;
+ npols++;
+ bp += 2 * nv;
+ i = sgetI2( &bp );
+ if ( i < 0 ) bp += 2; /* detail polygons */
+ }
+
+ if ( !lwAllocPolygons( plist, npols, nverts ))
+ goto Fail;
+
+ /* fill in the new polygons */
+
+ bp = buf;
+ pp = plist->pol + plist->offset;
+ pv = plist->pol[ 0 ].v + plist->voffset;
+
+ for ( i = 0; i < npols; i++ ) {
+ nv = sgetU2( &bp );
+
+ pp->nverts = nv;
+ pp->type = ID_FACE;
+ if ( !pp->v ) pp->v = pv;
+ for ( j = 0; j < nv; j++ )
+ pv[ j ].index = sgetU2( &bp ) + ptoffset;
+ j = sgetI2( &bp );
+ if ( j < 0 ) {
+ j = -j;
+ bp += 2;
+ }
+ j -= 1;
+ pp->surf = ( lwSurface * ) j;
+
+ pp++;
+ pv += nv;
+ }
+
+ _pico_free( buf );
+ return 1;
+
+Fail:
+ if ( buf ) _pico_free( buf );
+ lwFreePolygons( plist );
+ return 0;
+}
+
+
+/*
+======================================================================
+getLWObject5()
+
+Returns the contents of an LWOB, given its filename, or NULL if the
+file couldn't be loaded. On failure, failID and failpos can be used
+to diagnose the cause.
+
+1. If the file isn't an LWOB, failpos will contain 12 and failID will
+ be unchanged.
+
+2. If an error occurs while reading an LWOB, failID will contain the
+ most recently read IFF chunk ID, and failpos will contain the
+ value returned by _pico_memstream_tell() at the time of the failure.
+
+3. If the file couldn't be opened, or an error occurs while reading
+ the first 12 bytes, both failID and failpos will be unchanged.
+
+If you don't need this information, failID and failpos can be NULL.
+====================================================================== */
+
+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( &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;
+}
+
+int lwValidateObject5( char *filename, picoMemStream_t *fp, unsigned int *failID, int *failpos )
+{
+ unsigned int id, formsize, type;
+
+
+ /* open the file */
+
+ if ( !fp ) return PICO_PMV_ERROR_MEMORY;
+
+ /* read the first 12 bytes */
+
+ set_flen( 0 );
+ id = getU4( fp );
+ formsize = getU4( fp );
+ type = getU4( fp );
+ if ( 12 != get_flen() ) {
+ return PICO_PMV_ERROR_SIZE;
+ }
+
+ /* LWOB? */
+
+ if ( id != ID_FORM || type != ID_LWOB ) {
+ if ( failpos ) *failpos = 12;
+ return PICO_PMV_ERROR_IDENT;
+ }
+
+ return PICO_PMV_OK;
+}
projects / xonotic / netradiant.git / blobdiff