RASTER_intersectionFractions()

Datum RASTER_intersectionFractions

(

PG_FUNCTION_ARGS

)

Definition at line 1325 of file rtpg_spatial_relationship.c.

{
#if POSTGIS_GEOS_VERSION < 31400
        elog(ERROR, "The GEOS version this PostGIS binary "
                    "was compiled against (%d) does not include the "
                    "'GEOSGridIntersectionFractions' function (3.14.0+ required)",
                    POSTGIS_GEOS_VERSION);
                    PG_RETURN_NULL();
#else
        rt_pgraster *pgrast_in = (rt_pgraster *) PG_DETOAST_DATUM(PG_GETARG_DATUM(0));
        GSERIALIZED *gser = (GSERIALIZED *) PG_DETOAST_DATUM(PG_GETARG_DATUM(1));
        LWGEOM *lwg = lwgeom_from_gserialized(gser);
        rt_raster rast_out = NULL;
        rt_pgraster *pgrast_out = NULL;
        rt_raster rast_in = rt_raster_deserialize(pgrast_in, FALSE);
 
        int gtype = lwgeom_get_type(lwg);
        if (gtype != POLYGONTYPE && gtype != MULTIPOLYGONTYPE &&
                gtype != LINETYPE && gtype != MULTILINETYPE)
        {
                elog(ERROR, "ST_IntersectionFractions: Unsupported geometry type '%s'", lwtype_name(gtype));
        }
 
        rast_out = rt_raster_intersection_fractions(rast_in, lwg);
        if (!rast_out)
                elog(ERROR, "ST_IntersectionFractions: calculation returned NULL");
 
        pgrast_out = rt_raster_serialize(rast_out);
        rt_raster_destroy(rast_out);
        if (!pgrast_out)
                PG_RETURN_NULL();
 
        SET_VARSIZE(pgrast_out, pgrast_out->size);
        PG_RETURN_POINTER(pgrast_out);
 
#endif /* POSTGIS_GEOS_VERSION < 31400 */
}

References FALSE, LINETYPE, lwgeom_from_gserialized(), lwgeom_get_type(), lwtype_name(), MULTILINETYPE, MULTIPOLYGONTYPE, POLYGONTYPE, POSTGIS_GEOS_VERSION, rt_raster_deserialize(), rt_raster_destroy(), rt_raster_serialize(), and rt_raster_serialized_t::size.

Here is the call graph for this function: