Thanks for posting this. I’ve been searching for this PPD for quite a while. Did you did it out of an Adobe set per chance?
Yep, I ran into the same issue last week. There is an open ticket to track it: https://bugs.launchpad.net/qemu/+bug/1336794
the tool above catches the rest
It can be found here: http://www.failedinsider.com/corruptjpegcheckermacosx/ or in the mac app store.
Saved me a lot of time.
I realise you did this 2 years ago now, but this is really awesome. I'm a bit surprised there's not more attention drawn to:
- adding transparency to the JPEG specification in a standards-based way and
- your stop-gap solution.
Just curious though, why are you using uncompressed PNGs for the alpha channel? It would seem to me that embedding a grey-scale JPEG layer into the original JPEG would yield a much more compact solution and the benefits and pitfalls of lossfully compressing the alpha-channel should be very understood by the wielder of this solution.
Given the apparent intelligence reflected in your posts, it is obvious to me that you had already considered this, but yet you went with embedding a PNG into a JPEG. Do you have a post somewhere that details your logic here? If you're not interested in blogging about it, please drop a note at 'm' followed by 'j' followed by 'k' at sisuconsulting.com. Many, many thanks in advance!
Works for me, OS X 10.13.4 on 20180518. Copied gzip directly to /Library/Printers/PPDs/Contents/Resources and renamed to ‘HP DesignJet 755cm.gz’
Selected with JetDirect card & protocol. After print completed (looks good, color from Fusion360 demo sheet size B), there was about a ‘C’ sized drawings worth of blank, followed by text indicating “Error Undefined, OFFENDING COMMAND: Stack”
Thanks, would like to improve it too…tried with Windows drivers and Parallels multiple times. You’ve saved my DesignJet Thanks.