100 lines
2.8 KiB
C++
100 lines
2.8 KiB
C++
#include <llmr/map/tile_data.hpp>
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#include <llmr/map/tile_parser.hpp>
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#include <llmr/geometry/fill_buffer.hpp>
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#include <llmr/geometry/line_buffer.hpp>
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#include <llmr/geometry/point_buffer.hpp>
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#include <llmr/geometry/text_buffer.hpp>
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#include <llmr/geometry/elements_buffer.hpp>
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#include <llmr/util/raster.hpp>
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#include <llmr/util/string.hpp>
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using namespace llmr;
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TileData::TileData(Tile::ID id, const Style& style, GlyphAtlas& glyphAtlas, const std::string url, const bool is_raster)
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: id(id),
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url(url),
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state(State::initial),
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is_raster(is_raster),
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raster(),
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style(style),
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glyphAtlas(glyphAtlas) {
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// Initialize tile debug coordinates
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char coord[32];
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snprintf(coord, sizeof(coord), "%d/%d/%d", id.z, id.x, id.y);
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debugFontBuffer.addText(coord, 50, 200, 5);
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}
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TileData::~TileData() {
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glyphAtlas.removeGlyphs((uint64_t)id);
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cancel();
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}
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const std::string TileData::toString() const {
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return util::sprintf("[tile %d/%d/%d]", id.z, id.x, id.y);
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}
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void TileData::request() {
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state = State::loading;
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// Note: Somehow this feels slower than the change to request_http()
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std::weak_ptr<TileData> weak_tile = shared_from_this();
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platform::Request *request = platform::request_http(url, [=](platform::Response& res) {
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std::shared_ptr<TileData> tile = weak_tile.lock();
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if (!tile || tile->state == State::obsolete) {
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// noop. Tile is obsolete and we're now just waiting for the refcount
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// to drop to zero for destruction.
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} else if (res.code == 200) {
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tile->state = State::loaded;
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tile->data.swap(res.body);
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tile->parse();
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} else {
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fprintf(stderr, "tile loading failed\n");
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}
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}, []() {
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platform::restart();
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});
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req = request;
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}
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void TileData::cancel() {
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if (state != State::obsolete) {
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state = State::obsolete;
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platform::cancel_request_http(req);
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}
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}
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bool TileData::parse() {
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if (state != State::loaded) {
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return false;
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}
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if (is_raster) {
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// raster tiles don't need parsed, just decoded
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raster = std::make_shared<Raster>();
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raster->load(data);
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state = State::parsed;
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return true;
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}
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try {
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// Parsing creates state that is encapsulated in TileParser. While parsing,
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// the TileParser object writes results into this objects. All other state
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// is going to be discarded afterwards.
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TileParser parser(data, *this, style, glyphAtlas);
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} catch (const std::exception& ex) {
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fprintf(stderr, "[%p] exception [%d/%d/%d]... failed: %s\n", this, id.z, id.x, id.y, ex.what());
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cancel();
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return false;
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}
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if (state == State::obsolete) {
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return false;
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} else {
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state = State::parsed;
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}
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return true;
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}
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