first implementation of binary representation of elevation data

src/QtLocationPlugin/QGeoMapReplyQGC.cpp

@@ -52,9 +52,6 @@
 #include <QtNetwork/QNetworkAccessManager>
 #include <QFile>
 #include "TerrainTile.h"
-#include <QJsonDocument>
-#include <QJsonObject>
-#include <QJsonArray>
 
 int QGeoTiledMapReplyQGC::_requestCount = 0;
 
@@ -129,18 +126,13 @@ QGeoTiledMapReplyQGC::networkReplyFinished()
 
     // convert "a" to binary in case we have elevation data
     if ((UrlFactory::MapType)tileSpec().mapId() == UrlFactory::MapType::AirmapElevation) {
-        QJsonParseError parseError;
+
-        QJsonDocument json = QJsonDocument::fromJson(a, &parseError);
+        a = TerrainTile::serialize(a);
-        if (parseError.error != QJsonParseError::NoError) {
-            emit aborted();
-            return;
-        } else {
-            a = TerrainTile::serialize(json);
         if (a.isEmpty()) {
             emit aborted();
             return;
         }
-        }
+
     }
     setMapImageData(a);
     if(!format.isEmpty()) {

src/TerrainTile.cc

@@ -111,11 +111,17 @@ QGeoCoordinate TerrainTile::centerCoordinate(void) const
     return _southWest.atDistanceAndAzimuth(_southWest.distanceTo(_northEast) / 2.0, _southWest.azimuthTo(_northEast));
 }
 
-QByteArray TerrainTile::serialize(QJsonDocument document)
+QByteArray TerrainTile::serialize(QByteArray input)
 {
+    QJsonParseError parseError;
+    QJsonDocument document = QJsonDocument::fromJson(input, &parseError);
+    if (parseError.error != QJsonParseError::NoError) {
+        QByteArray emptyArray;
+        return emptyArray;
+    }
+
     QByteArray byteArray;
-    QIODevice::OpenMode writeonly = QIODevice::WriteOnly;
+    QDataStream stream(&byteArray, QIODevice::WriteOnly);
-    QDataStream stream(&byteArray, writeonly);
     if (!document.isObject()) {
         qCDebug(TerrainTileLog) << "Terrain tile json doc is no object";
         QByteArray emptyArray;

src/TerrainTile.h

@@ -89,7 +89,7 @@ public:
     *
     * @return serialized data
     */
-    static QByteArray serialize(QJsonDocument document);
+    static QByteArray serialize(QByteArray input);
 
 private:
     inline int _latToDataIndex(double latitude) const;