Bring out the constant factors and avoid dividing in a while loop wit…

…hin JP2KAKCreateCopy git-svn-id: https://svn.osgeo.org/gdal/trunk@37078 f0d54148-0727-0410-94bb-9a71ac55c965
faisal-w · Jan 9, 2017 · bacd915 · bacd915
1 parent 04a049e
commit bacd915
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/gdal/frmts/jp2kak/jp2kakdataset.cpp b/gdal/frmts/jp2kak/jp2kakdataset.cpp
@@ -2418,8 +2418,8 @@ JP2KAKCreateCopy( const char * pszFilename, GDALDataset *poSrcDS,
 /*      64K tiles.  There is a hard limit on the number of tiles        */
 /*      allowed in JPEG2000.                                            */
 /* -------------------------------------------------------------------- */
-    while( (double)nXSize*(double)nYSize
-           / (double)nTileXSize / (double)nTileYSize / 1024.0 >= 64.0 )
+    const double dfXbyY = static_cast<double>(nXSize * nYSize) / (1024 * 64);
+    while( dfXbyY >= static_cast<double>(nTileXSize * nTileYSize) )
     {
         nTileXSize *= 2;
         nTileYSize *= 2;