RASTER_envelope()

Datum RASTER_envelope

(

PG_FUNCTION_ARGS

)

Definition at line 66 of file rtpg_geometry.c.

References ES_NONE, gserialized_from_lwgeom(), lwgeom_free(), PG_FUNCTION_INFO_V1(), rtrowdump::raster, RASTER_convex_hull(), rt_raster_deserialize(), rt_raster_destroy(), rt_raster_get_envelope_geom(), and TRUE.

{
        rt_pgraster *pgraster;
        rt_raster raster;
        LWGEOM *geom = NULL;
        GSERIALIZED* gser = NULL;
        size_t gser_size;
        int err = ES_NONE;

        if (PG_ARGISNULL(0))
                PG_RETURN_NULL();

        pgraster = (rt_pgraster *) PG_DETOAST_DATUM_SLICE(
                PG_GETARG_DATUM(0),
                0,
                sizeof(struct rt_raster_serialized_t)
        );
        raster = rt_raster_deserialize(pgraster, TRUE);

        if (!raster) {
                PG_FREE_IF_COPY(pgraster, 0);
                elog(ERROR, "RASTER_envelope: Could not deserialize raster");
                PG_RETURN_NULL();
        }

        err = rt_raster_get_envelope_geom(raster, &geom);

        rt_raster_destroy(raster);
        PG_FREE_IF_COPY(pgraster, 0);

        if (err != ES_NONE) {
                elog(ERROR, "RASTER_envelope: Could not get raster's envelope");
                PG_RETURN_NULL();
        }
        else if (geom == NULL) {
                elog(NOTICE, "Raster's envelope is NULL");
                PG_RETURN_NULL();
        }

        gser = gserialized_from_lwgeom(geom, &gser_size);
        lwgeom_free(geom);

        SET_VARSIZE(gser, gser_size);
        PG_RETURN_POINTER(gser);
}

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