Transparent ImageWriter background about python-barcode

[tatarize]

This issue was about writing the transparency so the images could be put over other images, not changing the default mode.

You'd actually just need to check at the end before writing to JPG and convert it to RGB at the last second.
image = image.convert('RGB')

Then you'd have the best of both worlds. Also, since the barcodes are actually 2 color, you could also save them out as 2 bit pngs either palette, or black&white, which would make them much smaller in size.

[tatarize]

That code actually is allowed as an input and works correctly. The only thing that would need to be changed is the initialization of the image mode to RGBA. Rather than RGB.

class ImageWriterWithTransparency(ImageWriter):
    def _init(self, code):
        from PIL import Image, ImageDraw
        size = self.calculate_size(len(code[0]), len(code), self.dpi)
        self._image = Image.new("RGBA", size, self.background)
        self._draw = ImageDraw.Draw(self._image)

Use that as a your ImageWriter and you'll get transparencies.

[WhyNotHugo]

I'm tempted to just change the default to RGBA.

Just have to double check it won't break any existing setup (I can't think of any though, since the default is still white).

[WhyNotHugo]

Won't change the default since that would break JPEG, bug adding a parameter to use RGBA.