Added support for Garmin JNX maps

src/map/jnxmap.h

@@ -0,0 +1,73 @@
+#ifndef JNXMAP_H
+#define JNXMAP_H
+
+#include <QFile>
+#include <QVector>
+#include "common/rtree.h"
+#include "common/rectc.h"
+#include "transform.h"
+#include "map.h"
+
+class JNXMap : public Map
+{
+public:
+	Q_OBJECT
+
+public:
+	JNXMap(const QString &fileName, QObject *parent = 0);
+
+	const QString &name() const {return _name;}
+
+	QRectF bounds() const;
+	qreal resolution(const QRectF &rect) const;
+
+	int zoom() const {return _zoom;}
+	void setZoom(int zoom) {_zoom = zoom;}
+	int zoomFit(const QSize &size, const RectC &rect);
+	int zoomIn();
+	int zoomOut();
+
+	QPointF ll2xy(const Coordinates &c)
+		{return static_cast<const JNXMap &>(*this).ll2xy(c);}
+	Coordinates xy2ll(const QPointF &p)
+		{return static_cast<const JNXMap &>(*this).xy2ll(p);}
+
+	void draw(QPainter *painter, const QRectF &rect, bool block);
+
+	bool isValid() const {return _valid;}
+	QString errorString() const {return _errorString;}
+
+private:
+	struct Tile {
+		QPointF pos;
+		quint32 size;
+		quint32 offset;
+	};
+
+	struct Zoom {
+		Transform transform;
+		QVector<Tile> tiles;
+		RTree<Tile*, qreal, 2> tree;
+	};
+
+	QPointF ll2xy(const Coordinates &c) const;
+	Coordinates xy2ll(const QPointF &p) const;
+
+	template<class T> bool readValue(T &val);
+	bool readString(QByteArray &ba);
+	bool readTiles();
+
+	static bool cb(Tile *tile, void *context);
+	static QPixmap pixmap(const Tile *tile, QFile *file);
+
+	QString _name;
+	QFile _file;
+	QVector<Zoom> _zooms;
+	int _zoom;
+	RectC _bounds;
+
+	bool _valid;
+	QString _errorString;
+};
+
+#endif // JNXMAP_H