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#include <llmr/map/tile.hpp>
#include <stdint.h>
#include <cassert>
// #include <iostream>
#include <thread>
#include <llmr/util/pbf.hpp>
#include <llmr/util/string.hpp>
#include <llmr/geometry/geometry.hpp>
#include <llmr/renderer/fill_bucket.hpp>
#include <cmath>
using namespace llmr;
Tile::ID Tile::parent(const ID& id, int32_t z) {
assert(z < id.z);
ID pos(id);
while (pos.z > z) {
pos.z--;
pos.x = floor(pos.x / 2);
pos.y = floor(pos.y / 2);
}
return pos;
}
std::forward_list<Tile::ID> Tile::children(const ID& id, int32_t z) {
assert(z > id.z);
int32_t factor = pow(2, z - id.z);
std::forward_list<ID> children;
for (int32_t y = id.y * factor, y_max = (id.y + 1) * factor; y < y_max; y++) {
for (int32_t x = id.x * factor, x_max = (id.x + 1) * factor; x < x_max; x++) {
children.emplace_front(x, y, z);
}
}
return children;
}
Tile::Tile(ID id)
: id(id),
state(initial),
fillBuffer(),
data(0),
bytes(0) {
// Initialize tile debug coordinates
char coord[32];
snprintf(coord, sizeof(coord), "%d/%d/%d", id.z, id.x, id.y);
debugFontVertex.addText(coord, 50, 200, 5);
}
Tile::~Tile() {
std::lock_guard<std::mutex> lock(mtx);
// fprintf(stderr, "[%p] deleting tile %d/%d/%d\n", this, id.z, id.x, id.y);
if (this->data) {
free(this->data);
}
}
const std::string Tile::toString() const {
return util::sprintf("[tile %d/%d/%d]", id.z, id.x, id.y);
}
void Tile::setData(uint8_t *data, uint32_t bytes) {
this->data = (uint8_t *)malloc(bytes);
this->bytes = bytes;
memcpy(this->data, data, bytes);
}
void Tile::cancel() {
// TODO: thread safety
if (state != obsolete) {
state = obsolete;
} else {
assert((!"logic error? multiple cancelleations"));
}
}
bool Tile::parse() {
std::lock_guard<std::mutex> lock(mtx);
if (state == obsolete) {
return false;
}
// fprintf(stderr, "[%p] parsing tile [%d/%d/%d]...\n", this, z, x, y);
pbf tile(data, bytes);
try {
while (tile.next()) {
if (tile.tag == 3) { // layer
parseLayer(tile.message());
} else {
tile.skip();
}
}
} catch (const std::exception& ex) {
fprintf(stderr, "[%p] exception [%d/%d/%d]... failed: %s\n", this, id.z, id.x, id.y, ex.what());
cancel();
return false;
}
if (state == obsolete) {
return false;
} else {
state = ready;
}
return true;
}
void Tile::parseLayer(const pbf data) {
pbf layer(data);
while (layer.next()) {
if (layer.tag == 1) {
std::string name = layer.string();
if (name == "water") {
layers.emplace_front(name, createFillBucket(data));
}
} else {
layer.skip();
}
}
}
enum geom_type {
Unknown = 0,
Point = 1,
LineString = 2,
Polygon = 3
};
std::shared_ptr<Bucket> Tile::createFillBucket(const pbf data) {
pbf layer(data);
std::shared_ptr<FillBucket> bucket = std::make_shared<FillBucket>(fillBuffer);
while (layer.next()) {
if (layer.tag == 2) { // feature
pbf feature = layer.message();
pbf geometry;
geom_type type = Unknown;
while (feature.next()) {
if (feature.tag == 3) { // geometry type
type = (geom_type)feature.varint();
} else if (feature.tag == 4) { // geometry
geometry = feature.message();
} else {
feature.skip();
}
}
if (type == Polygon && geometry) {
bucket->addGeometry(geometry);
}
} else {
layer.skip();
}
}
return bucket;
}
// void Tile::addLineGeometry(pbf& geom) {
// Geometry geometry(geom);
// Geometry::command cmd;
// int32_t x, y;
// while ((cmd = geometry.next(x, y)) != Geometry::end) {
// if (cmd == Geometry::move_to) {
// lineVertex.addDegenerate();
// }
// lineVertex.addCoordinate(x, y);
// }
// }
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