mvt_ctx_to_bytea()

static bytea * mvt_ctx_to_bytea ( mvt_agg_context *  ctx )

static

Definition at line 1094 of file mvt.c.

{
        /* Fill out the tile slot, if it's not already filled. */
        /* We should only have a filled slot when all the work of building */
        /* out the data is complete, so after a serialize/deserialize cycle */
        /* or after a context combine */
        size_t len;
        bytea *ba;
 
        if (!ctx->tile)
        {
                ctx->tile = mvt_ctx_to_tile(ctx);
        }
 
        /* Zero features => empty bytea output */
        if (ctx && ctx->layer && ctx->layer->n_features == 0)
        {
                bytea* ba_empty = palloc(VARHDRSZ);
                SET_VARSIZE(ba_empty, VARHDRSZ);
                return ba_empty;
        }
 
        /* Serialize the Tile */
        len = VARHDRSZ + vector_tile__tile__get_packed_size(ctx->tile);
        ba = palloc(len);
        vector_tile__tile__pack(ctx->tile, (uint8_t*)VARDATA(ba));
        SET_VARSIZE(ba, len);
        return ba;
}

References mvt_agg_context::layer, mvt_ctx_to_tile(), and mvt_agg_context::tile.

Referenced by mvt_agg_finalfn(), and mvt_ctx_serialize().

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