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If a tile is too big, try backing off to lower resolutions before failing

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This commit is contained in:
Eric Fischer 2014-10-07 10:27:17 -07:00
parent bda20fe8a6
commit 8594dbe56b
1 changed files with 165 additions and 160 deletions
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31
tile.cc
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@ -643,6 +643,9 @@ int coalindexcmp(const struct coalesce *c1, const struct coalesce *c2) {
}
long long write_tile(struct index *start, struct index *end, char *metabase, unsigned *file_bbox, int z, unsigned tx, unsigned ty, int detail, int basezoom, struct pool *file_keys, char *layername, sqlite3 *outdb) {
int line_detail;
for (line_detail = detail; line_detail >= 7; line_detail--) {
GOOGLE_PROTOBUF_VERIFY_VERSION;
mapnik::vector::tile tile;
@ -651,7 +654,7 @@ long long write_tile(struct index *start, struct index *end, char *metabase, uns
layer->set_name(layername);
layer->set_version(1);
layer->set_extent(1 << detail);
layer->set_extent(1 << line_detail);
struct pool keys, values, dup;
pool_init(&keys, 0);
@ -686,27 +689,27 @@ long long write_tile(struct index *start, struct index *end, char *metabase, uns
}
}
drawvec geom = decode_feature(&meta, z, tx, ty, detail);
drawvec geom = decode_feature(&meta, z, tx, ty, line_detail);
if (t == VT_LINE) {
geom = clip_lines(geom, z, detail);
geom = clip_lines(geom, z, line_detail);
}
if (t == VT_POLYGON) {
geom = clip_poly(geom, z, detail);
geom = clip_poly(geom, z, line_detail);
}
if (t == VT_LINE || t == VT_POLYGON) {
geom = simplify_lines(geom, z, detail);
geom = simplify_lines(geom, z, line_detail);
}
#if 0
if (t == VT_LINE && z != basezoom) {
geom = shrink_lines(geom, z, detail, basezoom, &along);
geom = shrink_lines(geom, z, line_detail, basezoom, &along);
}
#endif
to_tile_scale(geom, z, detail);
to_tile_scale(geom, z, line_detail);
if (t == VT_POINT || to_feature(geom, NULL)) {
struct pool_val *pv = pool_long_long(&dup, &i->fpos, 0);
@ -818,12 +821,14 @@ long long write_tile(struct index *start, struct index *end, char *metabase, uns
compress(s, compressed);
if (compressed.size() > 500000) {
fprintf(stderr, "tile %d/%u/%u size is %lld, >500000\n", z, tx, ty, (long long) compressed.size());
fprintf(stderr, "tile %d/%u/%u size is %lld with detail %d, >500000 \n", z, tx, ty, (long long) compressed.size(), line_detail);
} else {
mbtiles_write_tile(outdb, z, tx, ty, compressed.data(), compressed.size());
return count;
}
}
fprintf(stderr, "could not make tile %d/%u/%u small enough\n", z, tx, ty);
exit(EXIT_FAILURE);
}
mbtiles_write_tile(outdb, z, tx, ty, compressed.data(), compressed.size());
return count;
}