https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=40473 --- Comment #1 from David Cook <dcook@prosentient.com.au> --- In PDF::Reuse::Barcode, the barcode is actually rendered on top of a white background, and that white background is calculated using this code: $length = 20 + (length($sPtn) * 0.9); 20 is an arbitrary number chosen by the creator of PDF::Reuse::Barcode to add padding around the barcode. Now $sPtn is the output of the following: my $oGDBar = GD::Barcode::Code39->new($value); $sPtn = $oGDBar->barcode(); Consider you have the Koha item barcode 39999000001310 The $sPtn will contain the following: 1000101110111010111011100010101010111000101110101011100010111010101110001011101010111000101110101010001110111010101000111011101010100011101110101010001110111010101000111011101011101000101011101110111000101010111010001010111010100011101110101000101110111010 When we use this calculation from PDF::Reuse::Barcode in Koha to calculate the barcode length, we get the *real* length of the barcode. With this patched, if we use a "Barcode width" of "1", the barcode plus its white barcode box background will take up 100% of the label. Thanks to that 20 point padding, we'll have some whitespace on the left and right sides of the barcode. When using a "Barcode with" of 1, you get a perfectly centered barcode as well. -- You are receiving this mail because: You are watching all bug changes.