libppd 2.0b1

[tillkamppeter]

First beta release approaching libppd 2.0.0, for retro-fitting classic CUPS drivers/PPD files on systems using the New Architecture for printing and scanning.

• Introduced the new libppd library overtaking all the PPD handling functions from libcups, CUPS' ppdc utility (PPD compiler using *.drv files), and the PPD file collection handling functionality from cups-driverd, as they are deprecated there and will get removed in CUPS 3.x. This form of conservation is mainly intended for converting classic printer drivers which use PPDs into Printer Applications without completely rewriting them.
• Added functions ppdLoadAttributes(), ppdFilterLoadPPD(), ppdFilterLoadPPDFile(), ppdFilterFreePPD(), and ppdFilterFreePPDFile() to convert all PPD file options and settings relevant for the filter functions in libcupsfilters into printer IPP attributes and options. Also create a named ("libppd") extension in the filter data structure, for filter functions explicitly supporting PPD files.
• Added ppdFilterCUPSWrapper() convenience function to easily create a classic CUPS filter from a filter function.
• Converted the ...tops CUPS filters into the filter functions ppdFilterPDFToPS(), and ppdFilterRasterToPS(). As PostScript as print output format is as deprecated as PPD files and all PostScript printers use PPD files, we move PostScript output generation to libppd, too.
• Converted CUPS' pstops filter into the ppdFilterPSToPS() filter function.
• Introduced ppdFilterImageToPS() filter function for Printer Applications to print on PostScript printers. It is used to print images (IPP standard requires at least JPEG to be accepted) without need of a PDF renderer (cfFilterImageToPDF() -> cfFilterPDFToPS()) and without need to convert to Raster (cfFilterImageToRaster() -> cfFilterRasterToPS()).
• Created wrappers to add PPD-defined JCL code to jobs for native PDF printers, ppdFilterImageToPDF() and ppdFilterPDFToPDF() filter functions with the underlying ppdFilterEmitJCL() function.
• Created ppdFilterUniversal() wrapper function for cfFilterUniversal() to add PPD file support, especially for PPD files which define driver filters.
• ppdFilterExternalCUPS() wrapper function for cfFilterExternal() to add PPD file support.
• Auto-pre-fill the presets with most suitable options from the PPD files with new ppdCacheAssignPresets() function (Only if not filled via "APPrinterPreset" in the PPD). This way we can use the IPP options print-color-mode, print-quality, and print-content-optimize in a PPD/CUPS-driver-retro-fitting Printer Application with most PPDs.
• In ppdCacheCreateWithPPD() also support presets for print-content-optimize, not only for print-color-mode and print-quality.
• In the ppdCacheGetPageSize() function do not only check the fit of the margins with the page size matching the job's page size (like "A4") but also the margins of the variants (like "A4.Borderless"), even if the variant's size dimensions differ from the base size (and the physical paper size), for example for overspray in borderless printing mode (HPLIP does this). Also select a borderless variant only if the job requests borderless (all margins zero).
• Move the functions ppdPwgUnppdizeName(), ppdPwgPpdizeName(), and ppdPwgPpdizeResolution() into the public API.
• In the ppdPwgUnppdizeName() allow to supply NULL as the list of characters to replace by dashes. Then all non-alpha-numeric characters get replaced, to result in IPP-conforming keyword strings.
• In the ppdPwgUnppdizeName() function support negative numbers
• ppdFilterPSToPS(): Introduced new input-page-ranges attribute (Issue #365, Pull request #444, #445).
• Changed ColorModel option in the PPDs from the PPD generator to mirror the print-color-mode IPP attribute instead of providing all color space/depth combos for manual selection. Color space and depth are now auto-selected by the urf-supported and pwg-raster-document-type-supported printer IPP attributes and the settings of print-color-mode and print-quality. This is now implemented in the cfFilterGhostscript() filter function both for use of the auto-generated PPD file for driverless iPP printers and use without PPD, based on IPP attributes. For this the new library functions cupsRasterPrepareHeader() to create a header for Raster output and cupsRasterSetColorSpace() to auto-select color space and depth were created.
• Clean-up of human-readable string handling in the PPD generator.
• Removed support for asymmetric image resolutions ("ppi=XXXxYYY") in cfFilterImageToPS() as CUPS does not support this (Issue #347, Pull request #361, OpenPrinting CUPS issue #115).
• Removed versioning.h and the macros defined in this file (Issue #334).
• Removed ppdCreateFromIPPCUPS(), we have a better one in libppd. Also removed corresponding test in testppd.
• Build system, README: Require CUPS 2.2.2+.
• 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.
• Added support for Sharp-proprietary ARDuplex PPD option name for double-sided printing.
• Build system: Add files in .gitignore that are generated by autogen.sh, configure, and make (Pull request #336).
• Fixed PPD memory leak caused by "emulators" field not freed (OpenPrinting CUPS issue #124).
• Make "True" in boolean options case-insensitive (OpenPrinting CUPS pull request #106).

[tillkamppeter]

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