add read/write of image roi offset in hdf5 file

xsocs/io/XsocsH5.py

@@ -142,6 +142,17 @@ class XsocsH5(XsocsH5Base):
         return self.__detector_params(entry, ['chan_per_deg_dim0',
                                               'chan_per_deg_dim1'])
 
+    @_process_entry
+    def image_roi_offset(self, entry):
+        """Image ROI offset that was saved in the hdf5 file
+
+        :param str entry: Entry from which to retrieve the information
+        :return: ROI offset (row_offset, column)
+        :rtype: Union[List[int],None]
+        """
+        return self.__detector_params(entry, 'image_roi_offset')
+
+
     @_process_entry
     def n_images(self, entry):
         # TODO : make sure that data.ndims = 3
@@ -342,6 +353,15 @@ class XsocsH5Writer(XsocsH5):
                  'chan_per_deg_dim1': chan_per_deg[1]}
         return self.__set_detector_params(entry, value)
 
+    def set_image_roi_offset(self, offset, entry):
+        """Store image ROI offset information in the hdf5 file
+
+        :param List[int] offset:
+            Offset of the ROI in pixels (row_offset, column_offset)
+        :param str entry: Entry for which to store information
+        """
+        return self.__set_detector_params(entry, {'image_roi_offset': offset})
+
     def set_scan_params(self,
                         entry,
                         motor_0,