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Add --drop-by-attribute-as-needed option (#384)

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This commit is contained in:
Shane Loeffler
2026-03-25 09:08:01 -07:00
committed by GitHub
parent a5805bd809
commit eb9acf9d44
6 changed files with 2010 additions and 5 deletions
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main.cpp
+26 -1
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@@ -98,6 +98,8 @@ long long extend_zooms_max = 0;
int retain_points_multiplier = 1;
std::vector<std::string> unidecode_data;
size_t maximum_string_attribute_length = 0;
std::string drop_by_attribute_as_needed_attribute;
bool drop_by_attribute_descending = false;
std::vector<order_field> order_by;
bool order_reverse;
@@ -2754,7 +2756,7 @@ std::pair<int, metadata> read_input(std::vector<source> &sources, char *fname, i
std::atomic<unsigned> midx(0);
std::atomic<unsigned> midy(0);
std::vector<strategy> strategies;
int written = traverse_zooms(fd, size, stringpool, &midx, &midy, maxzoom, minzoom, outdb, outdir, buffer, fname, tmpdir, gamma, full_detail, low_detail, min_detail, pool_off, initial_x, initial_y, simplification, maxzoom_simplification, layermaps, prefilter, postfilter, attribute_accum, filter, strategies, iz, shared_nodes_map, nodepos, shared_nodes_bloom, basezoom, droprate, unidecode_data);
int written = traverse_zooms(fd, size, stringpool, &midx, &midy, maxzoom, minzoom, outdb, outdir, buffer, fname, tmpdir, gamma, full_detail, low_detail, min_detail, pool_off, initial_x, initial_y, simplification, maxzoom_simplification, layermaps, prefilter, postfilter, attribute_accum, filter, strategies, iz, shared_nodes_map, nodepos, shared_nodes_bloom, basezoom, droprate, unidecode_data, &drop_by_attribute_as_needed_attribute, drop_by_attribute_descending);
if (maxzoom != written) {
if (written > minzoom) {
@@ -3090,6 +3092,8 @@ int main(int argc, char **argv) {
{"drop-densest-as-needed", no_argument, &additional[A_DROP_DENSEST_AS_NEEDED], 1},
{"drop-fraction-as-needed", no_argument, &additional[A_DROP_FRACTION_AS_NEEDED], 1},
{"drop-smallest-as-needed", no_argument, &additional[A_DROP_SMALLEST_AS_NEEDED], 1},
{"drop-by-attribute-as-needed", required_argument, 0, '~'},
{"drop-by-attribute-order", required_argument, 0, '~'},
{"coalesce-densest-as-needed", no_argument, &additional[A_COALESCE_DENSEST_AS_NEEDED], 1},
{"coalesce-fraction-as-needed", no_argument, &additional[A_COALESCE_FRACTION_AS_NEEDED], 1},
{"coalesce-smallest-as-needed", no_argument, &additional[A_COALESCE_SMALLEST_AS_NEEDED], 1},
@@ -3278,6 +3282,22 @@ int main(int argc, char **argv) {
} else if (strcmp(opt, "order-largest-first") == 0) {
order_by.push_back(order_field(ORDER_BY_SIZE, true));
order_by_size = true;
} else if (strcmp(opt, "drop-by-attribute-as-needed") == 0) {
if (optarg[0] == '\0') {
fprintf(stderr, "%s: --drop-by-attribute-as-needed requires a non-empty attribute name\n", argv[0]);
exit(EXIT_ARGS);
}
drop_by_attribute_as_needed_attribute = optarg;
additional[A_DROP_BY_ATTRIBUTE_AS_NEEDED] = 1;
} else if (strcmp(opt, "drop-by-attribute-order") == 0) {
if (strcmp(optarg, "asc") == 0) {
drop_by_attribute_descending = false;
} else if (strcmp(optarg, "desc") == 0) {
drop_by_attribute_descending = true;
} else {
fprintf(stderr, "%s: %s: order must be one of: asc, desc\n", argv[0], optarg);
exit(EXIT_ARGS);
}
} else if (strcmp(opt, "simplification-at-maximum-zoom") == 0) {
maxzoom_simplification = atof_require(optarg, "Mazoom simplification");
if (maxzoom_simplification <= 0) {
@@ -3799,6 +3819,11 @@ int main(int argc, char **argv) {
check_dir(out_dir, argv, force, forcetable);
}
if (additional[A_DROP_BY_ATTRIBUTE_AS_NEEDED] && drop_by_attribute_as_needed_attribute.empty()) {
fprintf(stderr, "%s: --drop-by-attribute-as-needed requires an attribute name\n", argv[0]);
exit(EXIT_ARGS);
}
int ret = EXIT_SUCCESS;
for (i = optind; i < argc; i++) {