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Write each tile to the destination tileset

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This commit is contained in:
Eric Fischer 2015-08-20 15:15:47 -07:00
parent 2e3f03172e
commit 29fcbf244d
1 changed files with 55 additions and 7 deletions
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62
tile-join.cc
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@ -53,11 +53,35 @@ inline int decompress(std::string const &input, std::string &output) {
return 1;
}
int dezig(unsigned n) {
return (n >> 1) ^ (-(n & 1));
// https://github.com/mapbox/mapnik-vector-tile/blob/master/src/vector_tile_compression.hpp
static inline int compress(std::string const &input, std::string &output) {
z_stream deflate_s;
deflate_s.zalloc = Z_NULL;
deflate_s.zfree = Z_NULL;
deflate_s.opaque = Z_NULL;
deflate_s.avail_in = 0;
deflate_s.next_in = Z_NULL;
deflateInit2(&deflate_s, Z_BEST_COMPRESSION, Z_DEFLATED, 31, 8, Z_DEFAULT_STRATEGY);
deflate_s.next_in = (Bytef *) input.data();
deflate_s.avail_in = input.size();
size_t length = 0;
do {
size_t increase = input.size() / 2 + 1024;
output.resize(length + increase);
deflate_s.avail_out = increase;
deflate_s.next_out = (Bytef *) (output.data() + length);
int ret = deflate(&deflate_s, Z_FINISH);
if (ret != Z_STREAM_END && ret != Z_OK && ret != Z_BUF_ERROR) {
return -1;
}
length += (increase - deflate_s.avail_out);
} while (deflate_s.avail_out == 0);
deflateEnd(&deflate_s);
output.resize(length);
return 0;
}
void handle(std::string message, int z, unsigned x, unsigned y, struct pool **file_keys, char ***layernames, int *nlayers) {
void handle(std::string message, int z, unsigned x, unsigned y, struct pool **file_keys, char ***layernames, int *nlayers, sqlite3 *outdb) {
GOOGLE_PROTOBUF_VERIFY_VERSION;
// https://github.com/mapbox/mapnik-vector-tile/blob/master/examples/c%2B%2B/tileinfo.cpp
@ -175,12 +199,36 @@ void handle(std::string message, int z, unsigned x, unsigned y, struct pool **fi
}
}
struct pool_val *pv;
for (pv = keys.head; pv != NULL; pv = pv->next) {
outlayer->add_keys(pv->s, strlen(pv->s));
}
for (pv = values.head; pv != NULL; pv = pv->next) {
mapnik::vector::tile_value *tv = outlayer->add_values();
if (pv->type == VT_NUMBER) {
tv->set_double_value(atof(pv->s));
} else if (pv->type == VT_BOOLEAN) {
tv->set_bool_value(pv->s[0] == 't');
} else {
tv->set_string_value(pv->s);
}
}
pool_free_strings(&keys);
pool_free_strings(&values);
}
std::string s;
std::string compressed;
outtile.SerializeToString(&s);
compress(s, compressed);
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) {
void decode(char *fname, char *map, struct pool **file_keys, char ***layernames, int *nlayers, sqlite3 *outdb) {
sqlite3 *db;
if (sqlite3_open(fname, &db) != SQLITE_OK) {
@ -204,9 +252,9 @@ void decode(char *fname, char *map, struct pool **file_keys, char ***layernames,
int len = sqlite3_column_bytes(stmt, 3);
const char *s = (const char *) sqlite3_column_blob(stmt, 3);
printf("%lld/%lld/%lld \r", zoom, x, y);
fprintf(stderr, "%lld/%lld/%lld \r", zoom, x, y);
handle(std::string(s, len), zoom, x, y, file_keys, layernames, nlayers);
handle(std::string(s, len), zoom, x, y, file_keys, layernames, nlayers, outdb);
}
sqlite3_finalize(stmt);
@ -259,7 +307,7 @@ int main(int argc, char **argv) {
char **layernames = NULL;
int nlayers = 0;
decode(argv[optind], argv[optind + 1], &file_keys, &layernames, &nlayers);
decode(argv[optind], argv[optind + 1], &file_keys, &layernames, &nlayers, outdb);
for (i = 0; i < nlayers; i++) {
printf("%s\n", layernames[i]);