base: make python3 barcode look similar to python2 barcodes

The library for python3 has differents, try to adjust it a bit.

bt5/erp5_base/ExtensionTemplateItem/portal_components/extension.erp5.BarcodeUtils.py

@@ -38,10 +38,21 @@ def generateBarcodeImage(self, barcode_type, data, REQUEST=None):
       barcode.codex.Code128(
         data, writer=NoTextImageWriter()
       ).render(
-        # we also set a font_size of 0, so that the bounding box of the
-        # image does not include white space for the text.
-        writer_options={'font_size': 0}
-      ).save(fp, format='png')
+        writer_options={
+          # we also set a font_size of 0, so that the bounding box of the
+          # image does not include white space for the text.
+          'font_size': 0,
+          # We set some default sizes to have similar appearance as what we had
+          # with hubarcode on python2:
+          # bar width is 3
+          'module_width': REQUEST.get('module_width', 0.3),
+          # Quiet zone is 10 bar widths on each side
+          'quiet_zone': REQUEST.get('quiet_zone', 3.0),
+          # Height was calculated so that the total height was total width / 3,
+          # but here we dont' know the total width, we make an approximation with the
+          # length of the data
+          'module_height': REQUEST.get('module_height', len(data) * 1.1),
+      }).save(fp, format='png')
       output = fp.getvalue()
     else:
       from hubarcode.code128 import Code128Encoder