Add parsing WCS info from XISF

imageinfo.cpp

@@ -62,7 +62,6 @@ WCSData::WCSData(int width, int height, char *header, int nrec) :
     width(width),
     height(height)
 {
-    int stat[NWCSFIX];
     int nreject = 0;
     int status = wcspih(header, nrec, 1, 0, &nreject, &nwcs, &wcs);
     if(status != 0)
@@ -70,8 +69,49 @@ WCSData::WCSData(int width, int height, char *header, int nrec) :
         freeWCS();
         return;
     }
-    status = wcsfix(0, 0, wcs, stat);
-    if(status != 0 || wcs->crpix[0] == 0)
+    status = cdfix(wcs);
+    if(status > 0 || wcs->crpix[0] == 0)
+        freeWCS();
+}
+
+WCSData::WCSData(int width, int height, const QVector<FITSRecord> &header) :
+    width(width),
+    height(height)
+{
+    int status = 0;
+
+    QByteArray str;
+    int nrec = 1;
+    for(const FITSRecord &record : header)
+    {
+        if(record.key.startsWith("PV"))continue;
+
+        QByteArray value = record.value.toString().toLatin1();
+        if(value.startsWith('\'') && value.endsWith('\''))
+        {
+            value.chop(1);
+            value = value.remove(0, 1);
+        }
+        QByteArray rec;
+        rec.append(record.key.leftJustified(8, ' '));
+        rec.append("= ");
+        rec.append(value);
+        rec.append(" / ");
+        rec.append(record.comment);
+        str.append(rec.leftJustified(80, ' ', true));
+        nrec++;
+    }
+    str.append(QByteArray("END").leftJustified(80));
+
+    int nreject = 0;
+    status = wcspih(str.data(), nrec, 1, 0, &nreject, &nwcs, &wcs);
+    if(status != 0)
+    {
+        freeWCS();
+        return;
+    }
+    status = cdfix(wcs);
+    if(status > 0 || wcs->crpix[0] == 0)
         freeWCS();
 }