https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=40473
Bug ID: 40473
Summary: X scale for Code39 barcodes is calculated incorrectly
Change sponsored?: ---
Product: Koha
Version: Main
Hardware: All
OS: All
Status: NEW
Severity: normal
Priority: P5 - low
Component: Label/patron card printing
Assignee: [email protected]
Reporter: [email protected]
QA Contact: [email protected]
While reviewing how "Barcode width" works as added by bug 10762, I noticed that
the calculation of the X scale factor for Code39 barcodes is incorrect.
If you specify a Barcode width of 1, you'd expect that to use 100% of the label
width. But it doesn't.
Now this isn't a problem introduced by Bug 10762, because Bug 10762 just
replaced a hard-coded value of .8 with a editable value. It's a much older bug.
Consider the following:
$x_scale_factor = ( $params{'width'} / $tot_bar_length );
$params{'width'} is the "Barcode width" multiplied by the label width. This
makes sense as it represents the total width that we're willing to use.
The problem is $tot_bar_length. It uses an algorithm which is inconsistent with
the algorithm used by PDF::Reuse::Barcode. But that's easy to fix!
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