62 lines
1.7 KiB
Python
62 lines
1.7 KiB
Python
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from decimal import Decimal
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import qrcode.image.base
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import qrcode.image.svg
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class BoxesQrCodeFactory(qrcode.image.base.BaseImage):
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"""
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SVG image builder
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Creates a QR-code image as a SVG document fragment.
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"""
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_SVG_namespace = "http://www.w3.org/2000/svg"
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kind = "SVG"
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allowed_kinds = ("SVG",)
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def __init__(self, *args, ctx=None, x=0, y=0, **kwargs):
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super().__init__(*args, **kwargs)
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self.ctx = ctx
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self.x, self.y = x, y
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# Save the unit size, for example the default box_size of 10 is '1mm'.
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self.unit_size = self.units(self.box_size)
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def drawrect(self, row, col):
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self.ctx.rectangle(*self._rect(row, col))
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self._img.append(self._rect(row, col))
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def units(self, pixels, text=True):
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"""
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A box_size of 10 (default) equals 1mm.
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"""
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units = Decimal(pixels) / 10
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if not text:
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return units
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return '%smm' % units
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def save(self, stream, kind=None):
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self.check_kind(kind=kind)
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self._write(stream)
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def to_string(self):
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return f"".join(self._img)
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def new_image(self, **kwargs):
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self._img = []
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return self._img
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def _rect(self, row, col):
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size = self.box_size / 10
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x = self.x + (row + self.border) * size
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y = self.y + (col + self.border) * size
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return x, y, size, size
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def _write(self, stream):
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stream.write("".join(self._img))
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if __name__=="__main__":
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import qrcode
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import qrcode.image
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q = qrcode.QRCode(image_factory=BoxesQrCodeFactory, box_size=10)
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q.add_data('hello')
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ctx = "a context"
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img = q.make_image(ctx="a context")
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print(img.to_string())
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