/usr/lib/python2.7/dist-packages/qrcode/image/base.py is in python-qrcode 5.0.1-1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 | class BaseImage(object):
"""
Base QRCode image output class.
"""
kind = None
allowed_kinds = None
def __init__(self, border, width, box_size, *args, **kwargs):
self.border = border
self.width = width
self.box_size = box_size
self.pixel_size = (self.width + self.border*2) * self.box_size
self._img = self.new_image(**kwargs)
def drawrect(self, row, col):
"""
Draw a single rectangle of the QR code.
"""
raise NotImplementedError("BaseImage.drawrect")
def save(self, stream, kind=None):
"""
Save the image file.
"""
raise NotImplementedError("BaseImage.save")
def pixel_box(self, row, col):
"""
A helper method for pixel-based image generators that specifies the
four pixel coordinates for a single rect.
"""
x = (col + self.border) * self.box_size
y = (row + self.border) * self.box_size
return [(x, y), (x + self.box_size - 1, y + self.box_size - 1)]
def new_image(self, **kwargs):
"""
Build the image class. Subclasses should return the class created.
"""
return None
def check_kind(self, kind, transform=None):
"""
Get the image type.
"""
if kind is None:
kind = self.kind
allowed = not self.allowed_kinds or kind in self.allowed_kinds
if transform:
kind = transform(kind)
if not allowed:
allowed = kind in self.allowed_kinds
if not allowed:
raise ValueError(
"Cannot set %s type to %s" % (type(self).__name__, kind))
return kind
|