RMF: Fix FlushCache with NoData block

* Fix compute min-max at FlushCache. * Compute min-max only once at dataset closing.
kadyb · May 28, 2022 · 9e2d1f3 · 9e2d1f3
1 parent 9160086
commit 9e2d1f3
Showing 1 changed file with 6 additions and 4 deletions.
diff --git a/frmts/rmf/rmfdataset.cpp b/frmts/rmf/rmfdataset.cpp
@@ -1052,19 +1052,21 @@ void RMFDataset::FlushCache(bool bAtClosing)
         poCompressData->oThreadPool.WaitCompletion();
     }
 
-    if( !bHeaderDirty )
-        return;
-
-    if( eRMFType == RMFT_MTW )
+    if( bAtClosing && eRMFType == RMFT_MTW )
     {
         GDALRasterBand *poBand = GetRasterBand(1);
 
         if( poBand )
         {
             poBand->ComputeRasterMinMax( FALSE, sHeader.adfElevMinMax );
+            // ComputeRasterMinMax can setup error in case of dataset full
+            // from NoData values, but it  makes no sense here.
+            CPLErrorReset();
             bHeaderDirty = true;
         }
     }
+    if( !bHeaderDirty )
+        return;
     WriteHeader();
 }