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Don't carry a bounding box around with the feature

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This commit is contained in:
Erica Fischer
2024-02-23 13:58:42 -08:00
parent bb3e84d1ec
commit e1dac4fb0b
4 changed files with 48 additions and 65 deletions
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plugin.cpp
-19
View File
@@ -398,8 +398,6 @@ serial_feature parse_feature(json_pull *jp, int z, unsigned x, unsigned y, std::
sf.geometry = dv;
sf.seq = 0;
sf.index = 0;
sf.bbox[0] = sf.bbox[1] = LLONG_MAX;
sf.bbox[2] = sf.bbox[3] = LLONG_MIN;
sf.extent = 0;
sf.has_id = false;
@@ -434,23 +432,6 @@ serial_feature parse_feature(json_pull *jp, int z, unsigned x, unsigned y, std::
}
}
for (size_t i = 0; i < dv.size(); i++) {
if (dv[i].op == VT_MOVETO || dv[i].op == VT_LINETO) {
if (dv[i].x < sf.bbox[0]) {
sf.bbox[0] = dv[i].x;
}
if (dv[i].y < sf.bbox[1]) {
sf.bbox[1] = dv[i].y;
}
if (dv[i].x > sf.bbox[2]) {
sf.bbox[2] = dv[i].x;
}
if (dv[i].y > sf.bbox[3]) {
sf.bbox[3] = dv[i].y;
}
}
}
json_object *id = json_hash_get(j, "id");
if (id != NULL && id->type == JSON_NUMBER) {
sf.id = id->value.number.number;
serial.cpp
+26 -25
View File
@@ -230,7 +230,7 @@ std::string serialize_feature(serial_feature *sf, long long wx, long long wy) {
return s;
}
serial_feature deserialize_feature(std::string const &geoms, unsigned z, unsigned tx, unsigned ty, unsigned *initial_x, unsigned *initial_y) {
serial_feature deserialize_feature(std::string const &geoms, unsigned z, unsigned tx, unsigned ty, unsigned *initial_x, unsigned *initial_y, long long bbox[]) {
serial_feature sf;
const char *cp = geoms.c_str();
@@ -261,7 +261,7 @@ serial_feature deserialize_feature(std::string const &geoms, unsigned z, unsigne
sf.label_point = 0;
sf.extent = 0;
sf.geometry = decode_geometry(&cp, z, tx, ty, sf.bbox, initial_x[sf.segment], initial_y[sf.segment]);
sf.geometry = decode_geometry(&cp, z, tx, ty, bbox, initial_x[sf.segment], initial_y[sf.segment]);
if (sf.layer & (1 << FLAG_INDEX)) {
deserialize_ulong_long(&cp, &sf.index);
@@ -412,10 +412,11 @@ static void add_scaled_node(struct reader *r, serialization_state *sst, draw g)
int serialize_feature(struct serialization_state *sst, serial_feature &sf, std::string const &layername) {
struct reader *r = &(*sst->readers)[sst->segment];
sf.bbox[0] = LLONG_MAX;
sf.bbox[1] = LLONG_MAX;
sf.bbox[2] = LLONG_MIN;
sf.bbox[3] = LLONG_MIN;
long long sf_bbox[4];
sf_bbox[0] = LLONG_MAX;
sf_bbox[1] = LLONG_MAX;
sf_bbox[2] = LLONG_MIN;
sf_bbox[3] = LLONG_MIN;
for (size_t i = 0; i < sf.geometry.size(); i++) {
if (sf.geometry[i].op == VT_MOVETO || sf.geometry[i].op == VT_LINETO) {
@@ -448,7 +449,7 @@ int serialize_feature(struct serialization_state *sst, serial_feature &sf, std::
// try to remind myself that the geometry in this function is in SCALED COORDINATES
drawvec scaled_geometry = sf.geometry;
sf.geometry.clear();
scale_geometry(sst, sf.bbox, scaled_geometry);
scale_geometry(sst, sf_bbox, scaled_geometry);
// This has to happen after scaling so that the wraparound detection has happened first.
// Otherwise the inner/outer calculation will be confused by bad geometries.
@@ -467,26 +468,26 @@ int serialize_feature(struct serialization_state *sst, serial_feature &sf, std::
scaled_geometry = remove_noop(scaled_geometry, sf.t, 0);
sf.bbox[0] = LLONG_MAX;
sf.bbox[1] = LLONG_MAX;
sf.bbox[2] = LLONG_MIN;
sf.bbox[3] = LLONG_MIN;
sf_bbox[0] = LLONG_MAX;
sf_bbox[1] = LLONG_MAX;
sf_bbox[2] = LLONG_MIN;
sf_bbox[3] = LLONG_MIN;
for (auto &g : scaled_geometry) {
long long x = SHIFT_LEFT(g.x);
long long y = SHIFT_LEFT(g.y);
if (x < sf.bbox[0]) {
sf.bbox[0] = x;
if (x < sf_bbox[0]) {
sf_bbox[0] = x;
}
if (y < sf.bbox[1]) {
sf.bbox[1] = y;
if (y < sf_bbox[1]) {
sf_bbox[1] = y;
}
if (x > sf.bbox[2]) {
sf.bbox[2] = x;
if (x > sf_bbox[2]) {
sf_bbox[2] = x;
}
if (y > sf.bbox[3]) {
sf.bbox[3] = y;
if (y > sf_bbox[3]) {
sf_bbox[3] = y;
}
}
}
@@ -672,8 +673,8 @@ int serialize_feature(struct serialization_state *sst, serial_feature &sf, std::
if (sf.t == VT_POINT) {
// keep old behavior, which loses one bit of precision at the bottom
midx = (sf.bbox[0] / 2 + sf.bbox[2] / 2) & ((1LL << 32) - 1);
midy = (sf.bbox[1] / 2 + sf.bbox[3] / 2) & ((1LL << 32) - 1);
midx = (sf_bbox[0] / 2 + sf_bbox[2] / 2) & ((1LL << 32) - 1);
midy = (sf_bbox[1] / 2 + sf_bbox[3] / 2) & ((1LL << 32) - 1);
} else {
// To reduce the chances of giving multiple polygons or linestrings
// the same index, use an arbitrary but predictable point from the
@@ -858,13 +859,13 @@ int serialize_feature(struct serialization_state *sst, serial_feature &sf, std::
fwrite_check(&index, sizeof(struct index), 1, r->indexfile, &r->indexpos, sst->fname);
for (size_t i = 0; i < 2; i++) {
if (sf.bbox[i] < r->file_bbox[i]) {
r->file_bbox[i] = sf.bbox[i];
if (sf_bbox[i] < r->file_bbox[i]) {
r->file_bbox[i] = sf_bbox[i];
}
}
for (size_t i = 2; i < 4; i++) {
if (sf.bbox[i] > r->file_bbox[i]) {
r->file_bbox[i] = sf.bbox[i];
if (sf_bbox[i] > r->file_bbox[i]) {
r->file_bbox[i] = sf_bbox[i];
}
}
serial.hpp
+8 -8
View File
@@ -65,30 +65,30 @@ struct serial_feature {
int tippecanoe_minzoom = -1;
int tippecanoe_maxzoom = -1;
drawvec geometry = drawvec();
drawvec geometry;
unsigned long long index = 0;
unsigned long long label_point = 0;
long long extent = 0;
// These fields are not directly serialized, but are used
// to create the keys and values references into the string pool
// during initial serialization
// during initial serialization,
// and are used to store attributes that are altered during tiling
std::vector<std::string> full_keys{};
std::vector<serial_val> full_values{};
std::vector<std::string> full_keys;
std::vector<serial_val> full_values;
// These fields are generated from full_keys and full_values
// during initial serialization and then replace the string
// representations:
std::vector<long long> keys{};
std::vector<long long> values{};
std::vector<long long> keys;
std::vector<long long> values;
// These fields are used during tiling,
// but are not serialized and are not expected
// to be provided by frontends:
long long bbox[4] = {0, 0, 0, 0};
drawvec edge_nodes; // what nodes at the tile edge were added during clipping?
#define FEATURE_DROPPED -1
@@ -112,7 +112,7 @@ struct serial_feature {
};
std::string serialize_feature(serial_feature *sf, long long wx, long long wy);
serial_feature deserialize_feature(std::string const &geoms, unsigned z, unsigned tx, unsigned ty, unsigned *initial_x, unsigned *initial_y);
serial_feature deserialize_feature(std::string const &geoms, unsigned z, unsigned tx, unsigned ty, unsigned *initial_x, unsigned *initial_y, long long bbox[]);
struct reader {
int poolfd = -1;
tile.cpp
+14 -13
View File
@@ -438,7 +438,7 @@ static std::vector<serial_feature> disassemble_multiplier_clusters(std::vector<s
}
// Write out copies of a feature into the temporary files for the next zoom level
static void rewrite(serial_feature const &osf, int z, int nextzoom, int maxzoom, unsigned tx, unsigned ty, int buffer, int within[], std::atomic<long long> *geompos, compressor *geomfile[], const char *fname, int child_shards, int max_zoom_increment, int segment, unsigned *initial_x, unsigned *initial_y) {
static void rewrite(serial_feature const &osf, int z, int nextzoom, int maxzoom, unsigned tx, unsigned ty, int buffer, int within[], std::atomic<long long> *geompos, compressor *geomfile[], const char *fname, int child_shards, int max_zoom_increment, int segment, unsigned *initial_x, unsigned *initial_y, long long osf_bbox[]) {
if (osf.geometry.size() > 0 && (nextzoom <= maxzoom || additional[A_EXTEND_ZOOMS] || extend_zooms_max > 0)) {
int xo, yo;
int span = 1 << (nextzoom - z);
@@ -449,7 +449,7 @@ static void rewrite(serial_feature const &osf, int z, int nextzoom, int maxzoom,
int k;
for (k = 0; k < 4; k++) {
// Division instead of right-shift because coordinates can be negative
bbox2[k] = osf.bbox[k] / (1 << (32 - nextzoom - 8));
bbox2[k] = osf_bbox[k] / (1 << (32 - nextzoom - 8));
}
// Decrement the top and left edges so that any features that are
// touching the edge can potentially be included in the adjacent tiles too.
@@ -920,30 +920,30 @@ struct write_tile_args {
// Clips a feature's geometry to the tile bounds at the specified zoom level
// with the specified buffer. Returns true if the feature was entirely clipped away
// by bounding box alone; otherwise returns false.
static bool clip_to_tile(serial_feature &sf, int z, long long buffer) {
int quick = quick_check(sf.bbox, z, buffer);
static bool clip_to_tile(serial_feature &sf, int z, long long buffer, long long sf_bbox[]) {
int quick = quick_check(sf_bbox, z, buffer);
if (z == 0) {
if (sf.bbox[0] <= (1LL << 32) * buffer / 256 || sf.bbox[2] >= (1LL << 32) - ((1LL << 32) * buffer / 256)) {
if (sf_bbox[0] <= (1LL << 32) * buffer / 256 || sf_bbox[2] >= (1LL << 32) - ((1LL << 32) * buffer / 256)) {
// If the geometry extends off the edge of the world, concatenate on another copy
// shifted by 360 degrees, and then make sure both copies get clipped down to size.
size_t n = sf.geometry.size();
if (sf.bbox[0] <= (1LL << 32) * buffer / 256) {
if (sf_bbox[0] <= (1LL << 32) * buffer / 256) {
for (size_t i = 0; i < n; i++) {
sf.geometry.push_back(draw(sf.geometry[i].op, sf.geometry[i].x + (1LL << 32), sf.geometry[i].y));
}
}
if (sf.bbox[2] >= (1LL << 32) - ((1LL << 32) * buffer / 256)) {
if (sf_bbox[2] >= (1LL << 32) - ((1LL << 32) * buffer / 256)) {
for (size_t i = 0; i < n; i++) {
sf.geometry.push_back(draw(sf.geometry[i].op, sf.geometry[i].x - (1LL << 32), sf.geometry[i].y));
}
}
sf.bbox[0] = 0;
sf.bbox[2] = 1LL << 32;
sf_bbox[0] = 0;
sf_bbox[2] = 1LL << 32;
quick = -1;
}
@@ -986,7 +986,7 @@ static bool clip_to_tile(serial_feature &sf, int z, long long buffer) {
// that are duplicated across the date line
if (prevent[P_DUPLICATION] && z != 0) {
if (point_within_tile((sf.bbox[0] + sf.bbox[2]) / 2, (sf.bbox[1] + sf.bbox[3]) / 2, z)) {
if (point_within_tile((sf_bbox[0] + sf_bbox[2]) / 2, (sf_bbox[1] + sf_bbox[3]) / 2, z)) {
// sf.geometry is unchanged
} else {
sf.geometry.clear();
@@ -1060,7 +1060,8 @@ static serial_feature next_feature(decompressor *geoms, std::atomic<long long> *
exit(EXIT_READ);
}
sf = deserialize_feature(s, z, tx, ty, initial_x, initial_y);
long long sf_bbox[4];
sf = deserialize_feature(s, z, tx, ty, initial_x, initial_y, sf_bbox);
sf.stringpool = global_stringpool + pool_off[sf.segment];
size_t passes = pass + 1;
@@ -1078,7 +1079,7 @@ static serial_feature next_feature(decompressor *geoms, std::atomic<long long> *
(*original_features)++;
if (clip_to_tile(sf, z, buffer)) {
if (clip_to_tile(sf, z, buffer, sf_bbox)) {
continue;
}
@@ -1090,7 +1091,7 @@ static serial_feature next_feature(decompressor *geoms, std::atomic<long long> *
if (first_time && pass == 0) { /* only write out the next zoom once, even if we retry */
if (sf.tippecanoe_maxzoom == -1 || sf.tippecanoe_maxzoom >= nextzoom) {
rewrite(sf, z, nextzoom, maxzoom, tx, ty, buffer, within, geompos, geomfile, fname, child_shards, max_zoom_increment, sf.segment, initial_x, initial_y);
rewrite(sf, z, nextzoom, maxzoom, tx, ty, buffer, within, geompos, geomfile, fname, child_shards, max_zoom_increment, sf.segment, initial_x, initial_y, sf_bbox);
}
}