vectortile_tile_combine()

static VectorTile__Tile* vectortile_tile_combine ( VectorTile__Tile *  tile1, VectorTile__Tile *  tile2  )

static

Definition at line 1224 of file mvt.c.

{
        uint32_t i, j;
        VectorTile__Tile *tile;
 
        /* Hopelessly messing up memory ownership here */
        if (tile1->n_layers == 0 && tile2->n_layers == 0)
                return tile1;
        else if (tile1->n_layers == 0)
                return tile2;
        else if (tile2->n_layers == 0)
                return tile1;
 
        tile = palloc(sizeof(VectorTile__Tile));
        vector_tile__tile__init(tile);
        tile->layers = palloc(sizeof(void*));
        tile->n_layers = 0;
 
        /* Merge all matching layers in the files (basically always only one) */
        for (i = 0; i < tile1->n_layers; i++)
        {
                for (j = 0; j < tile2->n_layers; j++)
                {
                        VectorTile__Tile__Layer *l1 = tile1->layers[i];
                        VectorTile__Tile__Layer *l2 = tile2->layers[j];
                        if (strcmp(l1->name, l2->name)==0)
                        {
                                VectorTile__Tile__Layer *layer = vectortile_layer_combine(l1, l2);
                                if (!layer)
                                        continue;
                                tile->layers[tile->n_layers++] = layer;
                                /* Add a spare slot at the end of the array */
                                tile->layers = repalloc(tile->layers, (tile->n_layers+1) * sizeof(void*));
                        }
                }
        }
        return tile;
}

References vectortile_layer_combine().

Referenced by mvt_ctx_combine().

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