RASTER_sameAlignment()

Datum RASTER_sameAlignment

(

PG_FUNCTION_ARGS

)

Definition at line 1193 of file rtpg_spatial_relationship.c.

{
        const uint32_t set_count = 2;
        rt_pgraster *pgrast[2];
        int pgrastpos[2] = {-1, -1};
        rt_raster rast[2] = {NULL};
 
        uint32_t i;
        uint32_t j;
        uint32_t k;
        int rtn;
        int aligned = 0;
        char *reason = NULL;
 
        for (i = 0, j = 0; i < set_count; i++) {
                /* pgrast is null, return null */
                if (PG_ARGISNULL(j)) {
                        for (k = 0; k < i; k++) {
                                rt_raster_destroy(rast[k]);
                                PG_FREE_IF_COPY(pgrast[k], pgrastpos[k]);
                        }
                        PG_RETURN_NULL();
                }
                pgrast[i] = (rt_pgraster *) PG_DETOAST_DATUM_SLICE(PG_GETARG_DATUM(j), 0, sizeof(struct rt_raster_serialized_t));
                pgrastpos[i] = j;
                j++;
 
                /* raster */
                rast[i] = rt_raster_deserialize(pgrast[i], TRUE);
                if (!rast[i]) {
                        for (k = 0; k <= i; k++) {
                                if (k < i)
                                        rt_raster_destroy(rast[k]);
                                PG_FREE_IF_COPY(pgrast[k], pgrastpos[k]);
                        }
                        elog(ERROR, "RASTER_sameAlignment: Could not deserialize the %s raster", i < 1 ? "first" : "second");
                        PG_RETURN_NULL();
                }
        }
 
        rtn = rt_raster_same_alignment(
                rast[0],
                rast[1],
                &aligned,
                &reason
        );
        for (k = 0; k < set_count; k++) {
                rt_raster_destroy(rast[k]);
                PG_FREE_IF_COPY(pgrast[k], pgrastpos[k]);
        }
 
        if (rtn != ES_NONE) {
                elog(ERROR, "RASTER_sameAlignment: Could not test for alignment on the two rasters");
                PG_RETURN_NULL();
        }
 
        /* only output reason if not aligned */
        if (reason != NULL && !aligned)
                elog(NOTICE, "%s", reason);
 
        PG_RETURN_BOOL(aligned);
}

References ES_NONE, rtpixdump::rast, rt_raster_deserialize(), rt_raster_destroy(), rt_raster_same_alignment(), and TRUE.

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