cups-filters 2.0b1

[tillkamppeter]

First beta release approaching cups-filters 2.0.0, for retro-fitting the filter functions of libcupsfilters and libppd into classic CUPS (2.x) environments.

• Converted nearly all filters to filter functions, only exceptions are rastertoescpx, rastertopclx, commandtoescpx, commandtopclx, and foomatic-rip. The latter is deeply involved with Foomatic PPDs and the others are legacy printer drivers. The filter functions are mainly in libcupsfilters, the ones which generate PostScript are in libppd.
• Replaced all the filters converted to filter functions by simple wrapper executables using ppdFilterCUPSWrapper() of libppd for backward compatibility with CUPS 2.x.
• Added new streaming mode triggered by the boolean "filter-streaming-mode" option. In this mode a filter (function) is supposed to avoid everything which prevents the job data from streaming, as loading the whole job (or good part of it) into a temporary file or into memory, interpreting PDF, pre-checking input file type or zero-page jobs, ... This is mainly to be used by Printer Applications when they do raster printing in streaming mode, to run with lowest resources possible. Currently foomatic-rip, ghostscript, and pdftopdf got a streaming mode. For the former two PostScript (not PDF) is assumed as input and no zero-page-job check is done, in the latter all QPDF processing (page management, page size adjustment, ...) is skipped and only JCL according to the PPD added.
• The CUPS filter imagetops uses the ppdFilterImageToPS() filter function of libppd now.
• driverless, driverless-fax: Added IPP Fax Out support. Now printer setup tools list an additional fax "driver". A fax queue is created by selecting this driver. Jobs have to be sent with "-o phone=12345" to supply the destination phone number (Pull request Add fax support #280, driverless-fax: don't use a fixed path #293, driverless.c: accept clean ipp uris too for 'driverless cat' #296, driverless.c: make the two ippfind tasks(for IPP and IPPS) run in parallel. #302, driverless.c: free an allocated memory, use MAX_OUTPUT_LEN #304, driverless.c: creating two more forks to read output of each ippfind call simultaneously #305, Free the used memory #306, driverless: Fix uninitialized buffer and parsing ippfind output #309, Issue [1.28.1] cups-browsed gets SIGKILL during service restart #298, driverless doesn't generate a ppd for dns-sd based uri #308).
• sys5ippprinter: Removed sys5ippprinter, as CUPS does not support System V interface scripts any more. This first approach of PPD-less printing was also not actually made use of.
• urftopdf: Removed as we require CUPS 2.2.2+ now which supports Apple Raster by itself.
• Build system, README.md: Require CUPS 2.2.2+. Removed now unneeded ./configure switches for use of the urftopdf filter for old CUPS versions.
• Sample PPDs: Renamed source directory from ppd/ to ppdfiles/.
• Build system: Remove '-D_PPD_DEPRECATED=""' from the compiling command lines of the source files which use libcups. The flag is not supported any more for longer times already and all the PPD-related functions deprecated by CUPS have moved into libppd now.
• Build system: Add files in .gitignore that are generated by "autogen.sh", "configure", and "make" (Pull request adding files in gitignore that are generated by autogen.sh configure … #336).

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This discussion was created from the release cups-filters 2.0b1.