Fix Do not prepend \\ to network share paths

loadimage.cpp

@@ -9,16 +9,18 @@
 #include <libexif/exif-data.h>
 #include "rawimage.h"
 
-QString makeMaxPath(QString path)
+QString makeUNCPath(const QString &path)
 {
 #ifdef Q_OS_WIN64
-    if(!path.startsWith("\\\\"))
+    if(!path.startsWith("\\\\") && !path.startsWith("//"))
     {
+        QString tmp;
         QFileInfo info(path);
-        path = info.absoluteFilePath();
-        path = QDir::toNativeSeparators(path);
-        path.prepend("\\\\?\\");
-        qDebug() << path;
+        tmp = info.absoluteFilePath();
+        tmp = QDir::toNativeSeparators(tmp);
+        tmp.prepend("\\\\?\\");
+        qDebug() << "makeMaxPath" << path << tmp;
+        return tmp;
     }
 #endif
     return path;
@@ -276,7 +278,7 @@ bool readFITSHeader(const QString &path, ImageInfoData &info)
 {
     fitsfile *fr;
     int status = 0;
-    QString path2 = makeMaxPath(path);
+    QString path2 = makeUNCPath(path);
     fits_open_diskfile(&fr, path2.toLocal8Bit().data(), READONLY, &status);
 
     if(fr && status == 0)
@@ -289,7 +291,7 @@ bool readFITSHeader(const QString &path, ImageInfoData &info)
 
 bool readXISFHeader(const QString &path, ImageInfoData &info)
 {
-    QString path2 = makeMaxPath(path);
+    QString path2 = makeUNCPath(path);
     try
     {
         LibXISF::XISFReader xisf;