std::unique_ptr<SymbolLayout> SymbolLayer::Impl::createLayout(BucketParameters& parameters) const {
SymbolLayoutProperties layoutProperties = layout;
CalculationParameters p(parameters.tileID.overscaledZ);
layoutProperties.recalculate(p);
if (layoutProperties.iconRotationAlignment.value == AlignmentType::Auto) {
if (layoutProperties.symbolPlacement.value == SymbolPlacementType::Line) {
layoutProperties.iconRotationAlignment.value = AlignmentType::Map;
} else {
layoutProperties.iconRotationAlignment.value = AlignmentType::Viewport;
}
}
if (layoutProperties.textRotationAlignment.value == AlignmentType::Auto) {
if (layoutProperties.symbolPlacement.value == SymbolPlacementType::Line) {
layoutProperties.textRotationAlignment.value = AlignmentType::Map;
} else {
layoutProperties.textRotationAlignment.value = AlignmentType::Viewport;
}
}
// If unspecified `text-pitch-alignment` inherits `text-rotation-alignment`
if (layoutProperties.textPitchAlignment.value == AlignmentType::Auto) {
layoutProperties.textPitchAlignment.value = layoutProperties.textRotationAlignment.value;
}
layoutProperties.textSize.calculate(CalculationParameters(18));
float textMaxSize = layoutProperties.textSize;
layoutProperties.iconSize.calculate(CalculationParameters(p.z + 1));
layoutProperties.textSize.calculate(CalculationParameters(p.z + 1));
return std::make_unique<SymbolLayout>(id,
parameters.layer.getName(),
parameters.tileID.overscaleFactor(),
parameters.tileID.overscaledZ,
parameters.mode,
parameters.layer,
filter,
layoutProperties,
textMaxSize,
*spriteAtlas);
}
std::unique_ptr<Bucket> LineLayer::Impl::createBucket(BucketParameters& parameters) const {
auto bucket = std::make_unique<LineBucket>(parameters.tileID.overscaleFactor());
bucket->layout = layout;
bucket->layout.recalculate(CalculationParameters(parameters.tileID.overscaledZ));
auto& name = bucketName();
parameters.eachFilteredFeature(filter, [&] (const auto& feature, std::size_t index, const std::string& layerName) {
auto geometries = feature.getGeometries();
bucket->addGeometry(geometries);
parameters.featureIndex.insert(geometries, index, layerName, name);
});
return std::move(bucket);
}
