def print_text(content=None):
"""
More possible parameters:
- alignment
"""
return_dict = {'success': False}
if content is None:
return_dict['error'] = 'Please provide the text for the label'
return return_dict
threshold = 170
fontsize = int(request.query.get('font_size', 100))
width = 720
margin = 0
height = 100 + 2*margin
try:
font_family = request.query.get('font_family')
font_style = request.query.get('font_style')
if font_family is None:
font_family = DEFAULT_FONT['family']
font_style = DEFAULT_FONT['style']
if font_style is None:
font_style = 'Regular'
font_path = FONTS[font_family][font_style]
except KeyError:
return_dict['error'] = "Couln't find the font & style"
return return_dict
im = Image.new('L', (width, height), 'white')
draw = ImageDraw.Draw(im)
im_font = ImageFont.truetype(font_path, fontsize)
textsize = draw.textsize(content, font=im_font)
vertical_offset = (height - textsize[1])//2
horizontal_offset = max((width - textsize[0])//2, 0)
if 'ttf' in font_path: vertical_offset -= 10
offset = horizontal_offset, vertical_offset
if DEBUG: print("Offset: {}".format(offset))
draw.text(offset, content, (0), font=im_font)
if DEBUG: im.save('sample-out.png')
arr = np.asarray(im, dtype=np.uint8)
arr.flags.writeable = True
white_idx = arr[:,:] < threshold
black_idx = arr[:,:] >= threshold
arr[white_idx] = 1
arr[black_idx] = 0
qlr = BrotherQLRaster(MODEL)
qlr.add_switch_mode()
qlr.add_invalidate()
qlr.add_initialize()
qlr.add_status_information()
qlr.mtype = 0x0A
qlr.mwidth = 62
qlr.mlength = 0
qlr.add_media_and_quality(im.size[1])
qlr.add_autocut(True)
qlr.add_cut_every(1)
qlr.dpi_600 = False
qlr.cut_at_end = True
qlr.add_expanded_mode()
qlr.add_margins()
qlr.add_compression(True)
qlr.add_raster_data(arr)
qlr.add_print()
if not DEBUG:
try:
be = BACKEND_CLASS(BACKEND_STRING_DESCR)
be.write(qlr.data)
be.dispose()
del be
except Exception as e:
return_dict['message'] = str(e)
logger.warning('Exception happened: %s', e)
response.status = 500
return return_dict
return_dict['success'] = True
if DEBUG: return_dict['data'] = str(qlr.data)
return return_dict
def main():
parser = argparse.ArgumentParser()
parser.add_argument('image')
parser.add_argument('outfile', nargs='?', type=argparse.FileType('wb'), default=stdout)
parser.add_argument('--model', default='QL-500')
parser.add_argument('--list-models', action='store_true', \
help='List available models and quit (the image argument is still required but ignored)')
parser.add_argument('--threshold', type=int, default=170)
parser.add_argument('--loglevel', type=lambda x: getattr(logging, x), default=logging.WARNING)
args = parser.parse_args()
logging.basicConfig(level=args.loglevel)
args.model = args.model.upper()
if args.list_models:
print('Supported models:')
print('\n'.join(models))
sys.exit(0)
try:
qlr = BrotherQLRaster(args.model)
except BrotherQLUnknownModel:
sys.exit("Unknown model. Use option --list-models to show available models.")
qlr.exception_on_warning = True
device_pixel_width = qlr.get_pixel_width()
im = Image.open(args.image)
hsize = int(im.size[1] / im.size[0] * device_pixel_width)
im = im.resize((device_pixel_width, hsize), Image.ANTIALIAS)
im = im.convert("L")
arr = np.asarray(im, dtype=np.uint8)
arr.flags.writeable = True
white_idx = arr[:,:] < args.threshold
black_idx = arr[:,:] >= args.threshold
arr[white_idx] = 1
arr[black_idx] = 0
try:
qlr.add_switch_mode()
except BrotherQLUnsupportedCmd:
pass
qlr.add_invalidate()
qlr.add_initialize()
try:
qlr.add_switch_mode()
except BrotherQLUnsupportedCmd:
pass
qlr.add_status_information()
qlr.mtype = 0x0A
qlr.mwidth = 62
qlr.mlength = 0
qlr.add_media_and_quality(im.size[1])
try:
qlr.add_autocut(True)
qlr.add_cut_every(1)
except BrotherQLUnsupportedCmd:
pass
try:
qlr.dpi_600 = False
qlr.cut_at_end = True
qlr.add_expanded_mode()
except BrotherQLUnsupportedCmd:
pass
qlr.add_margins()
try:
qlr.add_compression(True)
except BrotherQLUnsupportedCmd:
pass
qlr.add_raster_data(arr)
qlr.add_print()
args.outfile.write(qlr.data)
