Function postProcessFillPattern

src/fileformats/ocd_file_export.cpp:234–314

* Transform an area fill pattern sequence for OCD structure export. * * In Mapper, fill patterns are point symbols which are placed at certain offsets * and which are repeated in X and Y direction. OCD format does not support such * offsets, so we must move the point symbols elements instead. * * In addition, Mappper allows multiple explicit fill patterns. OCD format does * not support su

 * even if no adjustments are necessary.
 */
std::unique_ptr<PointSymbol> postProcessFillPattern(const FillPatternSequence& patterns, int structure_mode)
{
	auto* first_point_pattern = patterns.front();
	auto point_symbol = duplicate(*first_point_pattern->point);
	
	// If the (cloned) first point pattern has non-zero offsets,
	// we must apply them to the elements.
	if (first_point_pattern->line_offset != 0
	    || first_point_pattern->offset_along_line != 0)
	{
		for (int i = 0, last = point_symbol->getNumElements(); i < last; ++i)
		{
			if (auto* element = point_symbol->getElementObject(i))
				element->move(first_point_pattern->line_offset, first_point_pattern->offset_along_line);
		}
		if ((point_symbol->getInnerRadius() > 0 && point_symbol->getInnerColor())
		    || (point_symbol->getOuterWidth() > 0 && point_symbol->getOuterColor()))
		{
			// The central dot/circle must be converted to an explicit element to apply the offset.
			auto* primary_element = new PointSymbol();
			primary_element->setInnerRadius(point_symbol->getInnerRadius());
			primary_element->setInnerColor(point_symbol->getInnerColor());
			primary_element->setOuterWidth(point_symbol->getOuterWidth());
			primary_element->setOuterColor(point_symbol->getOuterColor());
			auto* object = new PointObject(primary_element);
			object->setPosition(first_point_pattern->line_offset, first_point_pattern->offset_along_line);
			point_symbol->addElement(0, object, primary_element);
			// Now, the central dot/circle have been replaced by primary_element.
			point_symbol->setInnerColor(nullptr);
			point_symbol->setOuterColor(nullptr);
		}
	}
	
	// Any remaining point patterns must be appended to the elements of
	// point_symbol, applying offsets if needed, ...
	using std::begin; using std::end;
	auto first = begin(patterns) + 1;
	auto last = end(patterns);
	
	// ... except for the second pattern when the OCD structure is "shifted rows".
	if (structure_mode == Ocd::StructureShiftedRows)
	{
		FILEFORMAT_ASSERT(patterns.size() == 2);
		if (first != last)
			++first;
	}
	
	auto i = point_symbol->getNumElements(); 
	for (auto it = first; it != last; ++it)
	{
		auto const* pattern = *it;
		auto const* pattern_symbol = pattern->point;
		if ((pattern_symbol->getInnerRadius() > 0 && pattern_symbol->getInnerColor())
		    || (pattern_symbol->getOuterWidth() > 0 && pattern_symbol->getOuterColor()))
		{
			auto* primary_element = new PointSymbol();
			primary_element->setInnerRadius(pattern_symbol->getInnerRadius());
			primary_element->setInnerColor(pattern_symbol->getInnerColor());