--- /dev/null
+/*
+======================================================================
+surface.c
+
+Surface functions for an LWO2 reader.
+
+Ernie Wright 17 Sep 00
+====================================================================== */
+
+#include "../picointernal.h"
+#include "lwo2.h"
+
+
+/*
+======================================================================
+lwFreePlugin()
+
+Free the memory used by an lwPlugin.
+====================================================================== */
+
+void lwFreePlugin( lwPlugin *p )
+{
+ if ( p ) {
+ if ( p->ord ) _pico_free( p->ord );
+ if ( p->name ) _pico_free( p->name );
+ if ( p->data ) _pico_free( p->data );
+ _pico_free( p );
+ }
+}
+
+
+/*
+======================================================================
+lwFreeTexture()
+
+Free the memory used by an lwTexture.
+====================================================================== */
+
+void lwFreeTexture( lwTexture *t )
+{
+ if ( t ) {
+ if ( t->ord ) _pico_free( t->ord );
+ switch ( t->type ) {
+ case ID_IMAP:
+ if ( t->param.imap.vmap_name ) _pico_free( t->param.imap.vmap_name );
+ if ( t->tmap.ref_object ) _pico_free( t->tmap.ref_object );
+ break;
+ case ID_PROC:
+ if ( t->param.proc.name ) _pico_free( t->param.proc.name );
+ if ( t->param.proc.data ) _pico_free( t->param.proc.data );
+ break;
+ case ID_GRAD:
+ if ( t->param.grad.key ) _pico_free( t->param.grad.key );
+ if ( t->param.grad.ikey ) _pico_free( t->param.grad.ikey );
+ break;
+ }
+ _pico_free( t );
+ }
+}
+
+
+/*
+======================================================================
+lwFreeSurface()
+
+Free the memory used by an lwSurface.
+====================================================================== */
+
+void lwFreeSurface( lwSurface *surf )
+{
+ if ( surf ) {
+ if ( surf->name ) _pico_free( surf->name );
+ if ( surf->srcname ) _pico_free( surf->srcname );
+
+ lwListFree( surf->shader, (void *) lwFreePlugin );
+
+ lwListFree( surf->color.tex, (void *) lwFreeTexture );
+ lwListFree( surf->luminosity.tex, (void *) lwFreeTexture );
+ lwListFree( surf->diffuse.tex, (void *) lwFreeTexture );
+ lwListFree( surf->specularity.tex, (void *) lwFreeTexture );
+ lwListFree( surf->glossiness.tex, (void *) lwFreeTexture );
+ lwListFree( surf->reflection.val.tex, (void *) lwFreeTexture );
+ lwListFree( surf->transparency.val.tex, (void *) lwFreeTexture );
+ lwListFree( surf->eta.tex, (void *) lwFreeTexture );
+ lwListFree( surf->translucency.tex, (void *) lwFreeTexture );
+ lwListFree( surf->bump.tex, (void *) lwFreeTexture );
+
+ _pico_free( surf );
+ }
+}
+
+
+/*
+======================================================================
+lwGetTHeader()
+
+Read a texture map header from a SURF.BLOK in an LWO2 file. This is
+the first subchunk in a BLOK, and its contents are common to all three
+texture types.
+====================================================================== */
+
+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;
+}
+
+
+/*
+======================================================================
+lwGetTMap()
+
+Read a texture map from a SURF.BLOK in an LWO2 file. The TMAP
+defines the mapping from texture to world or object coordinates.
+====================================================================== */
+
+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;
+}
+
+
+/*
+======================================================================
+lwGetImageMap()
+
+Read an lwImageMap from a SURF.BLOK in an LWO2 file.
+====================================================================== */
+
+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;
+}
+
+
+/*
+======================================================================
+lwGetProcedural()
+
+Read an lwProcedural from a SURF.BLOK in an LWO2 file.
+====================================================================== */
+
+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;
+}
+
+
+/*
+======================================================================
+lwGetGradient()
+
+Read an lwGradient from a SURF.BLOK in an LWO2 file.
+====================================================================== */
+
+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;
+}
+
+
+/*
+======================================================================
+lwGetTexture()
+
+Read an lwTexture from a SURF.BLOK in an LWO2 file.
+====================================================================== */
+
+lwTexture *lwGetTexture( picoMemStream_t *fp, int bloksz, unsigned int type )
+{
+ lwTexture *tex;
+ unsigned short sz;
+ int ok;
+
+ tex = _pico_calloc( 1, sizeof( lwTexture ));
+ if ( !tex ) return NULL;
+
+ tex->type = type;
+ 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;
+
+ sz = getU2( fp );
+ if ( !lwGetTHeader( fp, sz, tex )) {
+ _pico_free( tex );
+ return NULL;
+ }
+
+ sz = bloksz - sz - 6;
+ switch ( type ) {
+ case ID_IMAP: ok = lwGetImageMap( fp, sz, tex ); break;
+ case ID_PROC: ok = lwGetProcedural( fp, sz, tex ); break;
+ case ID_GRAD: ok = lwGetGradient( fp, sz, tex ); break;
+ default:
+ ok = !_pico_memstream_seek( fp, sz, PICO_SEEK_CUR );
+ }
+
+ if ( !ok ) {
+ lwFreeTexture( tex );
+ return NULL;
+ }
+
+ set_flen( bloksz );
+ return tex;
+}
+
+
+/*
+======================================================================
+lwGetShader()
+
+Read a shader record from a SURF.BLOK in an LWO2 file.
+====================================================================== */
+
+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;
+}
+
+
+/*
+======================================================================
+compare_textures()
+compare_shaders()
+
+Callbacks for the lwListInsert() function, which is called to add
+textures to surface channels and shaders to surfaces.
+====================================================================== */
+
+static int compare_textures( lwTexture *a, lwTexture *b )
+{
+ return strcmp( a->ord, b->ord );
+}
+
+
+static int compare_shaders( lwPlugin *a, lwPlugin *b )
+{
+ return strcmp( a->ord, b->ord );
+}
+
+
+/*
+======================================================================
+add_texture()
+
+Finds the surface channel (lwTParam or lwCParam) to which a texture is
+applied, then calls lwListInsert().
+====================================================================== */
+
+static int add_texture( lwSurface *surf, lwTexture *tex )
+{
+ lwTexture **list;
+
+ switch ( tex->chan ) {
+ case ID_COLR: list = &surf->color.tex; break;
+ case ID_LUMI: list = &surf->luminosity.tex; break;
+ case ID_DIFF: list = &surf->diffuse.tex; break;
+ case ID_SPEC: list = &surf->specularity.tex; break;
+ case ID_GLOS: list = &surf->glossiness.tex; break;
+ case ID_REFL: list = &surf->reflection.val.tex; break;
+ case ID_TRAN: list = &surf->transparency.val.tex; break;
+ case ID_RIND: list = &surf->eta.tex; break;
+ case ID_TRNL: list = &surf->translucency.tex; break;
+ case ID_BUMP: list = &surf->bump.tex; break;
+ default: return 0;
+ }
+
+ lwListInsert( (void **) list, tex, ( void *) compare_textures );
+ return 1;
+}
+
+
+/*
+======================================================================
+lwDefaultSurface()
+
+Allocate and initialize a surface.
+====================================================================== */
+
+lwSurface *lwDefaultSurface( void )
+{
+ lwSurface *surf;
+
+ surf = _pico_calloc( 1, sizeof( lwSurface ));
+ if ( !surf ) return NULL;
+
+ 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;
+
+ return surf;
+}
+
+
+/*
+======================================================================
+lwGetSurface()
+
+Read an lwSurface from an LWO2 file.
+====================================================================== */
+
+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;
+}
projects / voretournament / voretournament.git / blobdiff