On Thu, Jun 23, 2022 at 6:42 AM Patrick O'Callaghan <pocallag...@gmail.com> wrote:
> On Thu, 2022-06-23 at 13:02 +0930, Tim via users wrote: > > On Wed, 2022-06-22 at 14:01 -0300, George N. White III wrote: > > > AirPrint was introduced in 2011 to support iPads. > > > https://openprinting.github.io/driverless/01-standards-and-their-pdls/ > > > summarizes the differences in the various Driverless Printing > > > implementations. PDF is supported across the board, but there are > > > several raster formats and also PDFm which is viewable with PDF > > > viewers, but tailored for the capabilities of specific printer > > > models. > > > > I have a HP printer in that boat. It proudly proclaims direct PDF > > printing (send it a PDF file, or plug a USB into the front with a PDF > > on it). But after a lot of digging around you find that it only > > supports a special PDF created by their driver program, no other PDF > > files are supported. > > So Non-Portable Document Format ... > PDFm is supposed to work with PDF viewers. I assume it just adds printer-specific metadata: things like which paper tray, duplex (double-sided) long or short edge binding, collating, stapling, etc. -- George N. White III
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