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Copy the bounding box, center, zoom range metadata over

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This commit is contained in:
Eric Fischer 2015-08-20 16:12:34 -07:00
parent f131987f9e
commit 06ca52526d
1 changed files with 39 additions and 3 deletions
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42
tile-join.cc
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@ -17,6 +17,13 @@ extern "C" {
#include "mbtiles.h"
}
struct stats {
int minzoom;
int maxzoom;
double midlat, midlon;
double minlat, minlon, maxlat, maxlon;
};
// https://github.com/mapbox/mapnik-vector-tile/blob/master/src/vector_tile_compression.hpp
inline bool is_compressed(std::string const &data) {
return data.size() > 2 && (((uint8_t) data[0] == 0x78 && (uint8_t) data[1] == 0x9C) || ((uint8_t) data[0] == 0x1F && (uint8_t) data[1] == 0x8B));
@ -237,7 +244,7 @@ void handle(std::string message, int z, unsigned x, unsigned y, struct pool **fi
mbtiles_write_tile(outdb, z, x, y, compressed.data(), compressed.size());
}
void decode(char *fname, char *map, struct pool **file_keys, char ***layernames, int *nlayers, sqlite3 *outdb) {
void decode(char *fname, char *map, struct pool **file_keys, char ***layernames, int *nlayers, sqlite3 *outdb, struct stats *st) {
sqlite3 *db;
if (sqlite3_open(fname, &db) != SQLITE_OK) {
@ -268,6 +275,33 @@ void decode(char *fname, char *map, struct pool **file_keys, char ***layernames,
sqlite3_finalize(stmt);
if (sqlite3_prepare_v2(db, "SELECT value from metadata where name = 'minzoom'", -1, &stmt, NULL) == SQLITE_OK) {
if (sqlite3_step(stmt) == SQLITE_ROW) {
st->minzoom = sqlite3_column_int(stmt, 0);
}
sqlite3_finalize(stmt);
}
if (sqlite3_prepare_v2(db, "SELECT value from metadata where name = 'maxzoom'", -1, &stmt, NULL) == SQLITE_OK) {
if (sqlite3_step(stmt) == SQLITE_ROW) {
st->maxzoom = sqlite3_column_int(stmt, 0);
}
sqlite3_finalize(stmt);
}
if (sqlite3_prepare_v2(db, "SELECT value from metadata where name = 'center'", -1, &stmt, NULL) == SQLITE_OK) {
if (sqlite3_step(stmt) == SQLITE_ROW) {
const unsigned char *s = sqlite3_column_text(stmt, 0);
sscanf((char *) s, "%lf,%lf", &st->midlon, &st->midlat);
}
sqlite3_finalize(stmt);
}
if (sqlite3_prepare_v2(db, "SELECT value from metadata where name = 'bounds'", -1, &stmt, NULL) == SQLITE_OK) {
if (sqlite3_step(stmt) == SQLITE_ROW) {
const unsigned char *s = sqlite3_column_text(stmt, 0);
sscanf((char *) s, "%lf,%lf,%lf,%lf", &st->minlon, &st->minlat, &st->maxlon, &st->maxlat);
}
sqlite3_finalize(stmt);
}
if (sqlite3_close(db) != SQLITE_OK) {
fprintf(stderr, "%s: could not close database: %s\n", fname, sqlite3_errmsg(db));
exit(EXIT_FAILURE);
@ -316,13 +350,15 @@ int main(int argc, char **argv) {
}
sqlite3 *outdb = mbtiles_open(outfile, argv);
struct stats st;
memset(&st, 0, sizeof(st));
struct pool *file_keys = NULL;
char **layernames = NULL;
int nlayers = 0;
for (i = optind; i < argc; i++) {
decode(argv[i], csv, &file_keys, &layernames, &nlayers, outdb);
decode(argv[i], csv, &file_keys, &layernames, &nlayers, outdb, &st);
}
for (i = 0; i < nlayers; i++) {
@ -334,7 +370,7 @@ int main(int argc, char **argv) {
fk[i] = &(file_keys[i]);
}
mbtiles_write_metadata(outdb, outfile, layernames, 0, 0, 0, 0, 0, 0, 0, 0, fk, nlayers);
mbtiles_write_metadata(outdb, outfile, layernames, st.minzoom, st.maxzoom, st.minlat, st.minlon, st.maxlat, st.maxlon, st.midlat, st.midlon, fk, nlayers);
mbtiles_close(outdb, argv);
return 0;