brother_ql_create new CLI argument --compress

* create_label() now accepts a new keyword argument compress.
  The default is False → no compression if not set manually.
  This will speed-up the label creation in many cases
  at the expense of larger file sizes. Set to True if you
  don't care about processing time but want to store the
  generated label files.
* The brother_ql_create CLI offers this via the new
  argument --compress.
  New default (if not set): no compression.

README.md

@@ -63,7 +63,8 @@ giving:
 
     usage: brother_ql_create [-h] [--model MODEL] [--label-size LABEL_SIZE]
                              [--rotate {0,90,180,270}] [--threshold THRESHOLD]
-                             [--dither] [--no-cut] [--loglevel LOGLEVEL]
+                             [--dither] [--compress] [--no-cut]
+                             [--loglevel LOGLEVEL]
                              image [outfile]
     
     positional arguments:
@@ -87,6 +88,8 @@ giving:
                             between black and white pixels.
       --dither, -d          Enable dithering when converting the image to b/w. If
                             set, --threshold is meaningless.
+      --compress, -c        Enable compression (if available with the model).
+                            Takes more time but results in smaller file size.
       --no-cut              Don't cut the tape after printing the label.
       --loglevel LOGLEVEL   Set to DEBUG for verbose debugging output to stderr.
 

brother_ql/brother_ql_create.py

@@ -32,6 +32,7 @@ def main():
     parser.add_argument('--rotate', '-r', choices=('0', '90', '180', '270'), default='auto', help='Rotate the image (counterclock-wise) by this amount of degrees.')
     parser.add_argument('--threshold', '-t', type=float, default=70.0, help='The threshold value (in percent) to discriminate between black and white pixels.')
     parser.add_argument('--dither', '-d', action='store_true', help='Enable dithering when converting the image to b/w. If set, --threshold is meaningless.')
+    parser.add_argument('--compress', '-c', action='store_true', help='Enable compression (if available with the model). Takes more time but results in smaller file size.')
     parser.add_argument('--no-cut', dest='cut', action='store_false', help="Don't cut the tape after printing the label.")
     parser.add_argument('--loglevel', type=lambda x: getattr(logging, x), default=logging.WARNING, help='Set to DEBUG for verbose debugging output to stderr.')
     args = parser.parse_args()
@@ -53,11 +54,11 @@ def main():
 
     qlr.exception_on_warning = True
 
-    create_label(qlr, args.image, args.label_size, threshold=args.threshold, cut=args.cut, rotate=args.rotate, dither=args.dither)
+    create_label(qlr, args.image, args.label_size, threshold=args.threshold, cut=args.cut, rotate=args.rotate, dither=args.dither, compress=args.compress)
 
     args.outfile.write(qlr.data)
 
-def create_label(qlr, image, label_size, threshold=70, cut=True, dither=False, **kwargs):
+def create_label(qlr, image, label_size, threshold=70, cut=True, dither=False, compress=False, **kwargs):
 
     label_specs = label_type_specs[label_size]
     dots_printable = label_specs['dots_printable']
@@ -146,7 +147,7 @@ def create_label(qlr, image, label_size, threshold=70, cut=True, dither=False, *
         pass
     qlr.add_margins(label_specs['feed_margin'])
     try:
-        qlr.add_compression(True)
+        if compress: qlr.add_compression(True)
     except BrotherQLUnsupportedCmd:
         pass
     qlr.add_raster_data(im)