Re: [Gimp-print-devel] 5.3.5 release blocker

[Erik B. of T. <ba...@ta...>]

Thanks for the update!

Please let us know how we can help.

Erik


On Thu, 6 Mar 2025 08:26:41 -0500
Solomon Peachy via Gimp-print-devel
<gim...@li...> wrote:

> The short version: It's being held up by release blocker bugs.
> 
> The current holdup is a nasty margin-related bug that manifests
> itself as garbled printouts when producing 2x6" strips, but only with
> certian dyesub models and even then, depending on how the printjob is
> submitted to CUPS (eg as a pdf vs jpeg) it doesn't occur.
> 
> Essentially, the image data is submitted in a portrait orientiation,
> but needs to be rotated as the printer needs landscape oriented data,
> but under some circumstances (where there is a non-zero non-printable
> margin on the LEFT side) this transformation isn't being performed
> properly, but the data is read out as if it has.
> 
> I was able to work around the problem insofar as the rotation now
> always occurs, but I noticed the first colunm (or four) of the output
> data is still being garbled.  There is clearly still a boundary
> off-by-one error going on, and I strongly suspect it has been here
> for a _long_ time, but is not normally visible as it falls outside of
> page margins.
> 
> While trying to hunt this one down, I've been cleaning up many of the 
> spurious build warnings to hopefully expose stuff that matters, but 
> managed to introduce outright crashes in the injket dithering code
> along the way.  Turns out there are some real bugs lurking there too,
> likely of the "cancel each other out" variety.
> 
> (Ah, the joy of technical debt in a 25-year-old codebase..)
> 
>  - Solomon