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Labels enhancement priority-high. Milestone v3. Copy link. Why do we want to do this? Raw queues used for special-use printers require custom applications that know about printer capabilities and how to produce printer-ready document data. Is the expectation for an average user to configure LPrint? If so, is there an expectation that LPrint will be readily available for end-user consumption via precompiled binary?
If not, is LPrint intended to be bunded with an application? If so, is the expectation that each app will use some form of LPrint discovery?
The reason I ask is because configuring a printer is often done prior and separate from the application install. Coupling the two I believe to become a support nightmare and for this reason, I think the term "vertical" is a bit misleading, as if only industries choosing to use this hardware are affected.
Often app developers want to support all printer types and the industry which requires certain hardware has historically been the onus of the end-user person or company to manage. If LPrint starts to become bundled, printer discovery and installation starts to become shifted onto the application market.
It depends where LPrint lives, but Apple's sandboxing rules can make these utilities difficult or impossible to interact with Linux may suffer a similar fate for snaps. Let's say a developer doesn't want the ZPL2 driver to begin with, can we still add a raw queue?
If not, is there no chance CUPS would be willing to keep this single, raw functionality around? I hope my questions are well received. Member Author. Till Kamppeter has been working on doing this with the Snapcraft store for Ubuntu, and we've had an interesting discussion on the OpenPrinting printing-architecture list on how we can do this in general.
While LPrint can be bundled with an application, that isn't the intended focus since LPrint isn't limited to just one application or use case. Again, the purpose is to get away from applications that need to know how to talk to a particular printer and instead have applications that can provide standard formats that can be printed on any printer through the printing system. So do not use these filters when creating new PPDs or custom configurations.
The parameters for these filters are the same as for texttopdf and imagetopdf see below as the This program accepts the following image file format; gif, png, jpeg, tiff, photocd, portable-anymap, portable-bitmap, portable-graymap, portable-pixmap, sgi-rgb, sun-raster, xbitmap, xpixmap, xwindowdump xbitmap, xpixmap and xwindowdump images are converted into png images by the "convert" command.
Other kinds of image file format can be supported if the "convert" command support them. For other files, see the copyright notice and license of each file. Update the CUPS on your system. Collate, Copies, Duplex, OutputOrder Which handles these options depends on following options and attributes. Collate: If Collate is defined, "imagetopdf" judges the printer supports Collate. Copies: If cupsManualCopies is defined as True, "imagetopdf" judges the printer does not support Copies feature.
Duplex: If Duplex is defined, "imagetopdf" judges the printer supports Duplex. If cupsEvenDuplex is True, Number of pages must be even.
If the printer cannot handle these options, "imagetopdf" handles it. Following pseudo program describes how "imagetopdf" judges to handle these options. In this case, you can specify device options like a PS printer. However in this case, previous methods is not appropriate to specify device options.
Note: When you need to specify the value which is different from the choosen value based on the PPD into the jobInfo, you have to specify the values with the key started by "pdftopdfJCL" string. It replaces and imitates the pstops filter in the PDF-based workflow. A similar filter which can serve as behavior reference is called "cgpdftopdf" in OS X not open source. Command line pdftopdf follows the usual CUPS filter calling conventions, i.
Internally this will write the data to a temporary file, because the PDF format cannot be processed in a streaming fashion. In this case, clockwise rotation is used. Note: Some pages might end up degree rotated instead of 0 degree.
Those should probably be rotated manually before binding the pages together. Some PDF files like application forms contain interactive forms which the user can fill in inside a PDF viewer like evince. The filled in data is not integrated in each page of the PDF file but stored in an extra layer.
Due to this the data gets lost when applying manipulations like scaling or N-up to the pages. To prevent the loss of the data pdftopdf flattens the form before doing the manipulations.
The same flattening is needed for annotations in PDF files. This way no external utilities need to be called and so extra piping between processes and extra PDF interpreter runs are avoided which makes the filtering process faster.
As we did not test the new QPDF-based form-flattening with thousands of PDF files yet and it has not been available to actual users yet it is possible that there are still some bugs. To give users a possibility to work around possible bugs in QPDF's form flattening, we have introduced an option to get back to the old flattening by the external tools pdftocairo or Ghostscript.
If the selected utility fails, the form stays unflattened and so the filled in data will possibly not get printed. This enables for hardware copy generation and device collate; e. Special PDF comments pdftopdf adds comments to the pdf preamble that might esp. Limitations pdftopdf does not support functions that are not related to printing features, including interactive features and document interchange features.
Many of these operators and sections are just ignored. Some of these may be output, but those functions are not assured. Most notable is the use of AcroForms; their content will not be printed if any non-trivial processing by pdftopdf is involved e. This only occurs when a file is printed directly, e. Usual PDF viewer applications xpdf, evince, acroread, ghostscript, Known issues - Borders, esp. The imagetopdf or old pdftopdf documentation contains a tad more information.
License pdftopdf is released under the MIT license. The required libqpdf is available under version 2. The font names given there are used as fontconfig selectors; the best matching font, that is both monospaced and in a supported format TTC, TTF or OTF will then be used.
By appending the index-field returned from fontconfig, this is completely transparent to the user but currently not widely tested. To use: The filter is called just like any other cups filter. Have a look at test. Known Issues - Text extraction does not work at least for pdftotext from xpdf for the resulting pdfs.
Encryption feature is not supported. However, "pdftoraster" links some "poppler" libraries, and these files are under GNU public license. See copyright notice of each file for details. This filter supports all PCLm files. By default, ordered dithering is used. For other options, see CUPS documents for more details. URF raster is generated by some iOS applications when printing via Airprint, so this filter provides a more complete support for AirPrint clients.
Apple does not provide any official documentation of the format but there is already some reverse engineering done. The texttotext filter replaces the former textonly filter. It is for the following use cases: - Using text-only printers, like line printers or daisy-wheel printers. Note that only text can get printed in the way the printer is designed. POS printers often print only text on roll paper.
This filter has a non-paginated mode which prints continuously, ignoring page height definitions. The filter has the following features: - Conversion of UTF-8 to most printer's encodings. The default setting for lines and columns assume 6 lines per inch and 10 columns per inch.
Sending a Form Feed is highly recommended to get the content of each page exactly onto the desired sheet. If the printer does not support Form Feed characters, turn them off and make sure that you have adjusted the correct number of lines for each page size, as the printer is advancing pages by filling up the rest of the paper with blank lines.
ASCII should always work, but does not support letters with accents. So check the printer's manual what is supported. You cannot only use the encodings suggested by the PPD file, but any one-byte-per-character encoding which the "iconv" utility supports see "iconv --list" for a list of encodings.
Also note that text-only and dot-matrix printers often have a DIP switch block which allows for some hardware configuration, like newline characters, length of page, input encoding, Options of the texttotext filter: To be usually used when sending a job: PageSize: Paper format to be used.
Make sure that the number of lines and columns printable on each paper size are correctly adjusted with the appropriate setup option. The page height is ignore when pagination is turned off.
TabWidth: Width of a tab stop. Can be any positive number. Pagination: On: Text is divided in pages depending on the page size selection, with each page having the user-selected margins, recommended for sheet paper; Off: Text is printed continuously, ignoring page breaks and the height and upper and lower margins of the destination page size, recommended for roll paper, POS, long lists on continuous paper, Note that with pagination turned off, multiple copies, collate, page-ranges, page-set, and output-order are not supported and therefore ignored.
Top and bottom margins are ignored when pagination is turned off. Can be any positive number or zero for no margin. To be usually used when setting up the printer: PrinterEncoding: The printer's character encoding code page. Any encoding which the iconv utility can generate see "iconv --list" and which uses only one byte per character can be used.
This should support practically any printer which is capable of printing text. ASCII is the default setting. See the printer's manual for the correct encoding to use.
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