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#include <mbgl/text/collision_tile.hpp>
#include <mbgl/tile/tile_worker.hpp>
#include <mbgl/tile/geometry_tile.hpp>
#include <mbgl/style/style_layer.hpp>
#include <mbgl/style/style_bucket_parameters.hpp>
#include <mbgl/layer/background_layer.hpp>
#include <mbgl/layer/custom_layer.hpp>
#include <mbgl/layer/symbol_layer.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>
#include <utility>
using namespace mbgl;
TileWorker::TileWorker(TileID id_,
std::string sourceID_,
SpriteStore& spriteStore_,
GlyphAtlas& glyphAtlas_,
GlyphStore& glyphStore_,
const std::atomic<TileData::State>& state_,
const MapMode mode_)
: id(id_),
sourceID(std::move(sourceID_)),
spriteStore(spriteStore_),
glyphAtlas(glyphAtlas_),
glyphStore(glyphStore_),
state(state_),
mode(mode_) {
}
TileWorker::~TileWorker() {
glyphAtlas.removeGlyphs(reinterpret_cast<uintptr_t>(this));
}
TileParseResult TileWorker::parseAllLayers(std::vector<std::unique_ptr<StyleLayer>> layers_,
std::unique_ptr<const GeometryTile> geometryTile,
PlacementConfig config) {
// We're doing a fresh parse of the tile, because the underlying data has changed.
pending.clear();
placementPending.clear();
partialParse = false;
// Store the layers for use in redoPlacement.
layers = std::move(layers_);
// 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->get();
if (parsed.find(layer->bucketName()) == parsed.end()) {
parsed.emplace(layer->bucketName());
parseLayer(layer, *geometryTile);
}
}
result.state = pending.empty() ? TileData::State::parsed : TileData::State::partial;
if (result.state == TileData::State::parsed) {
placeLayers(config);
}
return std::move(result);
}
TileParseResult TileWorker::parsePendingLayers(const PlacementConfig config) {
// 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 = dynamic_cast<SymbolBucket*>(it->second.get());
assert(bucket); // Only symbol layers can be pending, so the dynamic cast should never fail.
if (!bucket->needsDependencies(glyphStore, spriteStore)) {
bucket->addFeatures(reinterpret_cast<uintptr_t>(this),
*layer.spriteAtlas,
glyphAtlas,
glyphStore);
placementPending.emplace(layer.bucketName(), std::move(it->second));
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;
if (result.state == TileData::State::parsed) {
placeLayers(config);
}
return std::move(result);
}
void TileWorker::placeLayers(const PlacementConfig config) {
redoPlacement(&placementPending, config);
for (auto &p : placementPending) {
p.second->swapRenderData();
insertBucket(p.first, std::move(p.second));
}
placementPending.clear();
}
void TileWorker::redoPlacement(
const std::unordered_map<std::string, std::unique_ptr<Bucket>>* buckets,
PlacementConfig config) {
CollisionTile 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 and custom layers are special cases.
if (layer->is<BackgroundLayer>() || layer->is<CustomLayer>())
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,
spriteStore,
glyphAtlas,
glyphStore,
mode);
std::unique_ptr<Bucket> bucket = layer->createBucket(parameters);
if (layer->is<SymbolLayer>()) {
if (partialParse) {
// We cannot parse this bucket yet. Instead, we're saving it for later.
pending.emplace_back(layer->as<SymbolLayer>(), std::move(bucket));
} else {
placementPending.emplace(layer->bucketName(), 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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