[reportlab-users] QR Codes

[Germán M. Bravo]

The thing is the problem is not only with QR codes, but regular barcodes as well. And the issue is there in PDF files too, not only GIFs. As soon as you zoom in in a PDF, you start seeing these artifacts there as well.

To make the QR grow or shrink to make even heaps is fairly easy, though the end size will probably vary too much and it would depend on the type of QR encoding version it ends up using (this too varies depending on the amount of data being encoded). So I'm not sure that's the best solution as we would lose control of the exact dimensions of the QR code.

Germán

On Sep 15, 2010, at 10:18 AM, Andy Robinson <andy at reportlab.com> wrote:


> On 15 September 2010 16:10, Robin Becker <robin at reportlab.com> wrote:

>> This problem is caused by our renderPM back end attempting to draw in

>> between the pixels.

> 

> I don't have time to look at code this week but am pleasantly

> surprised it works so well despite this.

> 

> We can't change the whole framework to draw pixels.

> 

> I think we need to understand how the overall dimensions of the QR

> 'square' are determined from the content, and see if there is

> flexibility in this so we could adjust it the drawing size a little

> and get things aligned with the grid.

> 

> - Andy

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