Deltavision: flip images right-side-up

Closes #9186.

Apparently, we have been reading all Deltavision images incorrectly for
the last 6.5 years.

components/bio-formats/src/loci/formats/in/DeltavisionReader.java

@@ -202,7 +202,18 @@ public byte[] openBytes(int no, byte[] buf, int x, int y, int w, int h)
     long offset = planeOffset + HEADER_LENGTH + extSize;
     if (offset < in.length()) {
       in.seek(HEADER_LENGTH + extSize + planeOffset);
-      readPlane(in, x, y, w, h, buf);
+      readPlane(in, x, getSizeY() - h - y, w, h, buf);
+
+      // reverse the order of the rows
+      // planes are stored with the origin in the lower-left corner
+      byte[] tmp = new byte[w * FormatTools.getBytesPerPixel(getPixelType())];
+      for (int row=0; row<h/2; row++) {
+        int src = row * tmp.length;
+        int dest = (h - row - 1) * tmp.length;
+        System.arraycopy(buf, src, tmp, 0, tmp.length);
+        System.arraycopy(buf, dest, buf, src, tmp.length);
+        System.arraycopy(tmp, 0, buf, dest, tmp.length);
+      }
     }
 
     return buf;