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#include <mbgl/text/collision_tile.hpp>
#include <mbgl/map/tile_worker.hpp>
#include <mbgl/map/geometry_tile.hpp>
#include <mbgl/style/style.hpp>
#include <mbgl/style/style_layer.hpp>
#include <mbgl/style/style_bucket_parameters.hpp>
#include <mbgl/sprite/sprite_atlas.hpp>
#include <mbgl/geometry/glyph_atlas.hpp>
#include <mbgl/renderer/symbol_bucket.hpp>
#include <mbgl/platform/log.hpp>
#include <mbgl/util/constants.hpp>
#include <mbgl/util/exception.hpp>
using namespace mbgl;
TileWorker::TileWorker(TileID id_,
std::string sourceID_,
Style& style_,
const std::atomic<TileData::State>& state_)
: id(id_),
sourceID(sourceID_),
style(style_),
state(state_) {
assert(style.sprite);
}
TileWorker::~TileWorker() {
style.glyphAtlas->removeGlyphs(reinterpret_cast<uintptr_t>(this));
}
TileParseResult TileWorker::parseAllLayers(std::vector<util::ptr<StyleLayer>> layers,
const GeometryTile& geometryTile,
PlacementConfig config) {
// We're doing a fresh parse of the tile, because the underlying data has changed.
pending.clear();
partialParse = false;
// Reset the collision tile so we have a clean slate; we're placing all features anyway.
collisionTile = std::make_unique<CollisionTile>(config);
// We're storing a set of bucket names we've parsed to avoid parsing a bucket twice that is
// referenced from more than one layer
std::set<std::string> parsed;
for (auto i = layers.rbegin(); i != layers.rend(); i++) {
const StyleLayer& layer = **i;
if (parsed.find(layer.bucketName()) == parsed.end()) {
parsed.emplace(layer.bucketName());
parseLayer(layer, geometryTile);
}
}
result.state = pending.empty() ? TileData::State::parsed : TileData::State::partial;
return std::move(result);
}
TileParseResult TileWorker::parsePendingLayers() {
// Try parsing the remaining layers that we couldn't parse in the first step due to missing
// dependencies.
for (auto it = pending.begin(); it != pending.end();) {
auto& layer = it->first;
auto& bucket = it->second;
assert(bucket);
if (layer.type == StyleLayerType::Symbol) {
auto symbolBucket = dynamic_cast<SymbolBucket*>(bucket.get());
if (!symbolBucket->needsDependencies(*style.glyphStore, *style.sprite)) {
symbolBucket->addFeatures(reinterpret_cast<uintptr_t>(this), *style.spriteAtlas,
*style.glyphAtlas, *style.glyphStore, *collisionTile);
insertBucket(layer.bucketName(), std::move(bucket));
pending.erase(it++);
continue;
}
}
// Advance the iterator here; we're skipping this when erasing an element from this list.
++it;
}
result.state = pending.empty() ? TileData::State::parsed : TileData::State::partial;
return std::move(result);
}
void TileWorker::redoPlacement(
std::vector<util::ptr<StyleLayer>> layers,
const std::unordered_map<std::string, std::unique_ptr<Bucket>>* buckets,
PlacementConfig config) {
// Reset the collision tile so we have a clean slate; we're placing all features anyway.
collisionTile = std::make_unique<CollisionTile>(config);
for (auto i = layers.rbegin(); i != layers.rend(); i++) {
const auto it = buckets->find((*i)->id);
if (it != buckets->end()) {
it->second->placeFeatures(*collisionTile);
}
}
}
void TileWorker::parseLayer(const StyleLayer& layer, const GeometryTile& geometryTile) {
// Cancel early when parsing.
if (state == TileData::State::obsolete)
return;
// Background is a special case.
if (layer.type == StyleLayerType::Background)
return;
// Skip this bucket if we are to not render this
if ((layer.source != sourceID) ||
(id.z < std::floor(layer.minZoom)) ||
(id.z >= std::ceil(layer.maxZoom)) ||
(layer.visibility == VisibilityType::None)) {
return;
}
auto geometryLayer = geometryTile.getLayer(layer.sourceLayer);
if (!geometryLayer) {
// The layer specified in the bucket does not exist. Do nothing.
if (debug::tileParseWarnings) {
Log::Warning(Event::ParseTile, "layer '%s' does not exist in tile %d/%d/%d",
layer.sourceLayer.c_str(), id.z, id.x, id.y);
}
return;
}
StyleBucketParameters parameters(id,
*geometryLayer,
state,
reinterpret_cast<uintptr_t>(this),
partialParse,
*style.spriteAtlas,
*style.sprite,
*style.glyphAtlas,
*style.glyphStore,
*collisionTile);
std::unique_ptr<Bucket> bucket = layer.createBucket(parameters);
if (layer.type == StyleLayerType::Symbol && partialParse) {
// We cannot parse this bucket yet. Instead, we're saving it for later.
pending.emplace_back(layer, std::move(bucket));
} else {
insertBucket(layer.bucketName(), std::move(bucket));
}
}
void TileWorker::insertBucket(const std::string& name, std::unique_ptr<Bucket> bucket) {
if (bucket->hasData()) {
result.buckets.emplace(name, std::move(bucket));
}
}
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