encode_mpoly()

static Data__Geometry* encode_mpoly ( struct geobuf_agg_context *  ctx, LWMPOLY *  lwmpoly  )

static

Definition at line 337 of file geobuf.c.

References geobuf_agg_context::dimensions, encode_coords(), galloc(), LWMPOLY::geoms, LWMPOLY::ngeoms, POINTARRAY::npoints, LWPOLY::nrings, and LWPOLY::rings.

Referenced by encode_geometry().

{
        int i, j, c, len, offset, n_lengths, ngeoms, nrings;
        POINTARRAY *pa;
        Data__Geometry *geometry;
        uint32_t *lengths;
        int64_t *coords = NULL;

        geometry = galloc(DATA__GEOMETRY__TYPE__MULTIPOLYGON);

        ngeoms = lwmpoly->ngeoms;

        if (ngeoms == 0) return geometry;

        n_lengths = 1;
        for (i = 0; i < ngeoms; i++) {
                nrings = lwmpoly->geoms[i]->nrings;
                n_lengths++;
                for (j = 0; j < nrings; j++)
                        n_lengths++;
        }

        lengths = palloc (sizeof (uint32_t) * n_lengths);

        c = 0;
        offset = 0;
        lengths[c++] = ngeoms;
        for (i = 0; i < ngeoms; i++) {
                nrings = lwmpoly->geoms[i]->nrings;
                lengths[c++] = nrings;
                for (j = 0; j < nrings; j++) {
                        pa = lwmpoly->geoms[i]->rings[j];
                        len = pa->npoints - 1;
                        coords = encode_coords(ctx, pa, coords, len, offset);
                        offset += len * ctx->dimensions;
                        lengths[c++] = len;
                }
        }

        if (c > 1) {
                geometry->n_lengths = n_lengths;
                geometry->lengths = lengths;
        }

        geometry->n_coords = offset;
        geometry->coords = coords;

        return geometry;
}

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