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#include <llmr/map/tile.hpp>
#include <stdint.h>
// #include <iostream>
#include <thread>
#include "pbf.hpp"
using namespace llmr;
tile::tile(int32_t z, int32_t x, int32_t y)
: z(z),
x(x),
y(y),
loaded(false),
data(0),
bytes(0) {
}
void tile::setData(uint8_t *data, uint32_t bytes) {
this->data = (uint8_t *)malloc(bytes);
this->bytes = bytes;
memcpy(this->data, data, bytes);
}
bool tile::parse()
{
fprintf(stderr, "[%8zx] parsing tile\n",
std::hash<std::thread::id>()(std::this_thread::get_id())
);
// try {
pbf tile(data, bytes);
while (tile.next()) {
if (tile.tag == 3) { // layer
uint32_t bytes = (uint32_t)tile.varint();
parseLayer(tile.data, bytes);
tile.skipBytes(bytes);
} else {
tile.skip();
}
}
// } catch (std::exception& ex) {
// std::cerr << ex.what();
// return false;
// }
loaded = true;
return true;
}
void tile::parseLayer(const uint8_t *data, uint32_t bytes) {
pbf layer(data, bytes);
std::string name;
while (layer.next()) {
if (layer.tag == 1) {
name = layer.string();
} else if (layer.tag == 2) {
uint32_t bytes = (uint32_t)layer.varint();
parseFeature(layer.data, bytes);
layer.skipBytes(bytes);
} else {
layer.skip();
}
}
}
void tile::parseFeature(const uint8_t *data, uint32_t bytes) {
pbf feature(data, bytes);
while (feature.next()) {
if (feature.tag == 1) {
uint32_t id = feature.varint();
} else if (feature.tag == 2) {
const uint8_t *tag_end = feature.data + feature.varint();
while (feature.data < tag_end) {
uint32_t key = feature.varint();
uint32_t value = feature.varint();
}
} else if (feature.tag == 3) {
uint32_t type = feature.varint();
} else if (feature.tag == 4) {
uint32_t bytes = (uint32_t)feature.varint();
loadGeometry(feature.data, bytes);
feature.skipBytes(bytes);
} else {
feature.skip();
}
}
}
void tile::loadGeometry(const uint8_t *data, uint32_t bytes) {
pbf geometry(data, bytes);
uint32_t cmd = 1;
uint32_t length = 0;
int32_t x = 0, y = 0;
// var lines = [];
// var line = null;
int32_t ox = 0, oy = 0;
while (geometry.data < geometry.end) {
if (!length) {
uint32_t cmd_length = (uint32_t)geometry.varint();
cmd = cmd_length & 0x7;
length = cmd_length >> 3;
}
length--;
if (cmd == 1 || cmd == 2) {
x += geometry.svarint();
y += geometry.svarint();
if (cmd == 1) {
// moveTo
// fprintf(stderr, "[m %d/%d] ", x, y);
// degenerate vertex
lineVertex.addDegenerate();
ox = x;
oy = y;
} else {
// lineTo
// fprintf(stderr, "[l %d/%d] ", x, y);
}
lineVertex.addCoordinate(x, y);
} else if (cmd == 7) {
// closePolygon
// fprintf(stderr, "[c]\n");
lineVertex.addCoordinate(ox, oy);
} else {
// throw new Error('unknown command ' + cmd);
// throw std::runtime_error("unknown command");
fprintf(stderr, "unknown command");
exit(1);
}
}
}
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