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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 <llmr/renderer/line_bucket.hpp>
#include <llmr/style/style.hpp>
#include <llmr/platform/platform.hpp>
#include <llmr/util/string.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, const Style& style)
: id(id),
state(initial),
debugFontBuffer(std::make_shared<DebugFontBuffer>()),
fillBuffer(std::make_shared<FillBuffer>()),
lineBuffer(std::make_shared<LineBuffer>()),
style(style) {
// Initialize tile debug coordinates
char coord[32];
snprintf(coord, sizeof(coord), "%d/%d/%d", id.z, id.x, id.y);
debugFontBuffer->addText(coord, 50, 200, 5);
}
Tile::~Tile() {
}
const std::string Tile::toString() const {
return util::sprintf("[tile %d/%d/%d]", id.z, id.x, id.y);
}
void Tile::request() {
state = Tile::loading;
// Create http request
std::string url = util::sprintf("http://localhost:3333/gl/tiles/plain/%d-%d-%d.vector.pbf",
id.z, id.x, id.y);
// Note: Somehow this feels slower than the change to request_http()
std::shared_ptr<Tile> tile = shared_from_this();
platform::request_http(url, [=](platform::Response& res) {
if (res.code == 200) {
tile->data.swap(res.body);
platform::async([tile]() {
tile->parse();
}, []() {
// TODO: Make sure this gets passed the correct map ID/pointer.
platform::restart(NULL);
});
} else {
fprintf(stderr, "tile loading failed\n");
}
});
}
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;
}
try {
tile = VectorTile(pbf((const uint8_t *)data.data(), data.size()));
parseStyleLayers(style.layers);
} 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::parseStyleLayers(const std::vector<LayerDescription>& layers) {
for (const LayerDescription& layer_desc : layers) {
if (layer_desc.child_layer.size()) {
// This is a layer group.
// TODO: create framebuffer
parseStyleLayers(layer_desc.child_layer);
// TODO: render framebuffer on previous framebuffer
} else {
// This is a singular layer. Check if this bucket already exists. If not,
// parse this bucket.
auto bucket_it = buckets.find(layer_desc.bucket_name);
if (bucket_it == buckets.end()) {
auto bucket_it = style.buckets.find(layer_desc.bucket_name);
if (bucket_it != style.buckets.end()) {
// Only create the new bucket if we have an actual specification
// for it.
std::shared_ptr<Bucket> bucket = createBucket(bucket_it->second);
if (bucket) {
// Bucket creation might fail because the data tile may not
// contain any data that falls into this bucket.
buckets[layer_desc.bucket_name] = bucket;
}
} else {
// There is no proper specification for this bucket, even though
// it is referenced in the stylesheet.
fprintf(stderr, "Stylesheet specifies bucket %s, but it is not defined\n", layer_desc.bucket_name.c_str());
}
}
}
}
}
std::shared_ptr<Bucket> Tile::createBucket(const BucketDescription& bucket_desc) {
auto layer_it = tile.layers.find(bucket_desc.source_layer);
if (layer_it != tile.layers.end()) {
const VectorTileLayer& layer = layer_it->second;
if (bucket_desc.type == BucketType::Fill) {
return createFillBucket(layer, bucket_desc);
} else if (bucket_desc.type == BucketType::Line) {
return createLineBucket(layer, bucket_desc);
} else {
// TODO: create other bucket types.
}
} else {
// The layer specified in the bucket does not exist. Do nothing.
}
return NULL;
}
std::shared_ptr<Bucket> Tile::createFillBucket(const VectorTileLayer& layer, const BucketDescription& bucket_desc) {
std::shared_ptr<FillBucket> bucket = std::make_shared<FillBucket>(fillBuffer, bucket_desc);
FilteredVectorTileLayer filtered_layer(layer, bucket_desc);
for (pbf feature : filtered_layer) {
while (feature.next(4)) { // geometry
pbf geometry_pbf = feature.message();
if (geometry_pbf) {
bucket->addGeometry(geometry_pbf);
}
}
}
return bucket;
}
std::shared_ptr<Bucket> Tile::createLineBucket(const VectorTileLayer& layer, const BucketDescription& bucket_desc) {
std::shared_ptr<LineBucket> bucket = std::make_shared<LineBucket>(lineBuffer, bucket_desc);
FilteredVectorTileLayer filtered_layer(layer, bucket_desc);
for (pbf feature : filtered_layer) {
while (feature.next(4)) { // geometry
pbf geometry_pbf = feature.message();
if (geometry_pbf) {
bucket->addGeometry(geometry_pbf);
}
}
}
return bucket;
}
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