Add support for GeoTIFF images

src/map/pcs.cpp

@@ -0,0 +1,125 @@
+#include "pcs.h"
+
+
+class PCS::Entry {
+public:
+	Entry(int id, int gcs, int proj, const PCS &pcs)
+	  : _id(id), _gcs(gcs), _proj(proj), _pcs(pcs) {}
+
+	int id() const {return _id;}
+	int gcs() const {return _gcs;}
+	int proj() const {return _proj;}
+	const PCS &pcs() const {return _pcs;}
+
+private:
+	int _id;
+	int _gcs;
+	int _proj;
+	PCS _pcs;
+};
+
+QList<PCS::Entry> PCS::_pcss;
+QString PCS::_errorString;
+int PCS::_errorLine;
+
+static double parameter(const QString &str, bool *res)
+{
+	QString field = str.trimmed();
+	if (field.isEmpty()) {
+		*res = true;
+		return NAN;
+	}
+
+	return field.toDouble(res);
+}
+
+PCS::PCS(int id)
+{
+	for (int i = 0; i < _pcss.size(); i++) {
+		if (_pcss.at(i).id() == id) {
+			*this = _pcss.at(i).pcs();
+			return;
+		}
+	}
+
+	*this = PCS();
+}
+
+PCS::PCS(int gcs, int proj)
+{
+	for (int i = 0; i < _pcss.size(); i++) {
+		if (_pcss.at(i).gcs() == gcs && _pcss.at(i).proj() == proj) {
+			*this = _pcss.at(i).pcs();
+			return;
+		}
+	}
+
+	*this = PCS();
+}
+
+bool PCS::loadList(const QString &path)
+{
+	QFile file(path);
+	bool res[12];
+	int id, gcs, proj, transform;
+
+
+	if (!file.open(QFile::ReadOnly)) {
+		_errorString = qPrintable(file.errorString());
+		return false;
+	}
+
+	_errorLine = 1;
+	_errorString.clear();
+
+	while (!file.atEnd()) {
+		QByteArray line = file.readLine();
+		QList<QByteArray> list = line.split(',');
+		if (list.size() != 12) {
+			_errorString = "Format error";
+			return false;
+		}
+
+		id = list[1].trimmed().toInt(&res[1]);;
+		gcs = list[2].trimmed().toInt(&res[2]);
+		proj = list[3].trimmed().toInt(&res[3]);
+		transform = list[4].trimmed().toInt(&res[4]);
+
+		Projection::Setup setup(
+		  parameter(list[5], &res[5]), parameter(list[6], &res[6]),
+		  parameter(list[7], &res[7]), parameter(list[8], &res[8]),
+		  parameter(list[9], &res[9]), parameter(list[10], &res[10]),
+		  parameter(list[11], &res[11]));
+
+		for (int i = 1; i < 12; i++) {
+			if (!res[i]) {
+				_errorString = "Parse error";
+				return false;
+			}
+		}
+
+		Datum datum(gcs);
+		if (datum.isNull()) {
+			_errorString = "Unknown datum";
+			return false;
+		}
+		Projection::Method method(transform);
+		if (method.isNull()) {
+			_errorString = "Unknown coordinates transformation method";
+			return false;
+		}
+
+		_pcss.append(Entry(id, gcs, proj, PCS(datum, method, setup)));
+
+		_errorLine++;
+	}
+
+	return true;
+}
+
+QDebug operator<<(QDebug dbg, const PCS &pcs)
+{
+	dbg.nospace() << "PCS(" << pcs.datum() << ", " << pcs.method()
+	  << ", " << pcs.setup() << ")";
+	return dbg.space();
+}