+++ /dev/null
-/*
-======================================================================
-lwo2.c
-
-The entry point for loading LightWave object files.
-
-Ernie Wright 17 Sep 00
-====================================================================== */
-
-#include "../picointernal.h"
-#include "lwo2.h"
-
-/* disable warnings */
-#ifdef WIN32
-#pragma warning( disable:4018 ) /* signed/unsigned mismatch */
-#endif
-
-
-/*
-======================================================================
-lwFreeLayer()
-
-Free memory used by an lwLayer.
-====================================================================== */
-
-void lwFreeLayer( lwLayer *layer )
-{
- if ( layer ) {
- if ( layer->name ) _pico_free( layer->name );
- lwFreePoints( &layer->point );
- lwFreePolygons( &layer->polygon );
- lwListFree( layer->vmap, (void *) lwFreeVMap );
- _pico_free( layer );
- }
-}
-
-
-/*
-======================================================================
-lwFreeObject()
-
-Free memory used by an lwObject.
-====================================================================== */
-
-void lwFreeObject( lwObject *object )
-{
- if ( object ) {
- lwListFree( object->layer, (void *) lwFreeLayer );
- lwListFree( object->env, (void *) lwFreeEnvelope );
- lwListFree( object->clip, (void *) lwFreeClip );
- lwListFree( object->surf, (void *) lwFreeSurface );
- lwFreeTags( &object->taglist );
- _pico_free( object );
- }
-}
-
-
-/*
-======================================================================
-lwGetObject()
-
-Returns the contents of a LightWave object, 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 LWO2 or an LWOB, failpos will contain 12 and
- failID will be unchanged.
-
-2. If an error occurs while reading, 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 *lwGetObject( const char *filename, picoMemStream_t *fp, unsigned int *failID, int *failpos )
-{
- lwObject *object;
- lwLayer *layer;
- lwNode *node;
- unsigned int id, formsize, type;
- int i, rlen, 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;
- }
-
- /* is this a LW object? */
-
- if ( id != ID_FORM ) {
- if ( failpos ) *failpos = 12;
- return NULL;
- }
-
- if ( type != ID_LWO2 ) {
- if ( type == ID_LWOB )
- return lwGetObject5( filename, fp, failID, failpos );
- else {
- 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;
-
- /* 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 = _pico_calloc( 1, sizeof( lwLayer ));
- if ( !layer ) goto Fail;
- lwListAdd( (void **) &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 );
- rlen = get_flen();
- if ( rlen < cksize )
- _pico_memstream_seek( fp, cksize - rlen, PICO_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( (void **) &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 )
- _pico_memstream_seek( fp, cksize - rlen, PICO_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( (void **) &object->env, node );
- object->nenvs++;
- break;
-
- case ID_CLIP:
- node = ( lwNode * ) lwGetClip( fp, cksize );
- if ( !node ) goto Fail;
- lwListAdd( (void **) &object->clip, node );
- object->nclips++;
- break;
-
- case ID_SURF:
- node = ( lwNode * ) lwGetSurface( fp, cksize );
- if ( !node ) goto Fail;
- lwListAdd( (void **) &object->surf, node );
- object->nsurfs++;
- break;
-
- case ID_DESC:
- case ID_TEXT:
- case ID_ICON:
- default:
- _pico_memstream_seek( fp, cksize, PICO_SEEK_CUR );
- break;
- }
-
- /* end of the file? */
-
- if ( formsize <= (unsigned int) (_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;
- }
-
- 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 = _pico_memstream_tell( fp );
- }
- lwFreeObject( object );
- return NULL;
-}
-
-int lwValidateObject( const 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;
- }
-
- /* is this a LW object? */
-
- if ( id != ID_FORM ) {
- if ( failpos ) *failpos = 12;
- return PICO_PMV_ERROR_SIZE;
- }
-
- if ( type != ID_LWO2 ) {
- if ( type == ID_LWOB )
- return lwValidateObject5( filename, fp, failID, failpos );
- else {
- if ( failpos ) *failpos = 12;
- return PICO_PMV_ERROR_IDENT;
- }
- }
-
- return PICO_PMV_OK;
-}
projects / voretournament / voretournament.git / blobdiff