class ScannerCamera(ScannerBase):
'''Widget that use the kivy.uix.camera.Camera and zbar to detect
qrcode. When found, the `symbols` will be updated
'''
def __init__(self, **kwargs):
super(ScannerCamera, self).__init__(**kwargs)
self._camera = None
# create a scanner used for detecting qrcode
self._scanner = ImageScanner()
self._scanner.parse_config('enable')
#self._scanner.setConfig(Symbol.QRCODE, Config.ENABLE, 1)
#self._scanner.setConfig(0, Config.X_DENSITY, 3)
#self._scanner.setConfig(0, Config.Y_DENSITY, 3)
def start(self):
if not self._camera:
self._camera = Camera(
resolution=self.camera_size,
size_hint=(None, None))
self.add_widget(self._camera)
self.bind(size=self._camera.setter('size'))
self.bind(pos=self._camera.setter('pos'))
else:
self._camera._camera.init_camera()
self._camera.play = True
Clock.schedule_interval(self._detect_qrcode_frame, 1/15)
def stop(self):
if not self._camera:
return
self._camera.play = False
Clock.unschedule(self._detect_qrcode_frame)
# TODO: testing for various platforms(windows, mac)
if platform == 'linux':
self._camera._camera._pipeline.set_state(1)
#self._camera = None
def _detect_qrcode_frame(self, *args):
# the image we got by default from a camera is using the rgba format
# zbar only allow Y800/GREY image, so we first need to convert,
# then start the detection on the image
if not self.get_root_window():
self.stop()
return
cam = self._camera
tex = cam.texture
if not tex:
return
im = PILImage.fromstring('RGBA', tex.size, tex.pixels)
im = im.convert('L')
barcode = Image(tex.size[0],
tex.size[1], 'Y800', im.tostring())
result = self._scanner.scan(barcode)
if result == 0:
self.symbols = []
del(barcode)
return
# we detected qrcode! extract and dispatch them
symbols = []
for symbol in barcode.symbols:
qrcode = ScannerCamera.Qrcode(
type=symbol.type,
data=symbol.data,
quality=symbol.quality,
count=symbol.count,
bounds=symbol.location)
symbols.append(qrcode)
self.symbols = symbols
del(barcode)
class ScannerCamera(ScannerBase):
'''Widget that use the kivy.uix.camera.Camera and zbar to detect
qrcode. When found, the `symbols` will be updated
'''
def __init__(self, **kwargs):
super(ScannerCamera, self).__init__(**kwargs)
self._camera = None
# create a scanner used for detecting qrcode
self._scanner = ImageScanner()
self._scanner.parse_config('enable')
#self._scanner.setConfig(Symbol.QRCODE, Config.ENABLE, 1)
#self._scanner.setConfig(0, Config.X_DENSITY, 3)
#self._scanner.setConfig(0, Config.Y_DENSITY, 3)
def start(self):
if not self._camera:
self._camera = Camera(
resolution=self.camera_size,
size_hint=(None, None))
self.add_widget(self._camera)
self.bind(size=self._camera.setter('size'))
self.bind(pos=self._camera.setter('pos'))
else:
self._camera._camera.init_camera()
self._camera.play = True
Clock.schedule_interval(self._detect_qrcode_frame, 1/15)
def stop(self):
if not self._camera:
return
self._camera.play = False
Clock.unschedule(self._detect_qrcode_frame)
# TODO: testing for various platforms(windows, mac)
if platform == 'linux':
self._camera._camera._pipeline.set_state(1)
#self._camera = None
def _detect_qrcode_frame(self, *args):
# the image we got by default from a camera is using the rgba format
# zbar only allow Y800/GREY image, so we first need to convert,
# then start the detection on the image
if not self.get_root_window():
self.stop()
return
cam = self._camera
tex = cam.texture
if not tex:
return
im = PILImage.fromstring('RGBA', tex.size, tex.pixels)
im = im.convert('L')
barcode = Image(tex.size[0],
tex.size[1], 'Y800', im.tostring())
result = self._scanner.scan(barcode)
if result == 0:
self.symbols = []
del(barcode)
return
# we detected qrcode! extract and dispatch them
symbols = []
for symbol in barcode.symbols:
qrcode = ScannerCamera.Qrcode(
type=symbol.type,
data=symbol.data,
quality=symbol.quality,
count=symbol.count,
bounds=symbol.location)
symbols.append(qrcode)
self.symbols = symbols
del(barcode)
