libppd 2.1b1

[tillkamppeter]

First beta release for libppd 2.1.0.

New features (more to come):

• Support for building with libcups3, CUPS library of CUPS 3.x
  (Pull request Make libppd build with libcups3 as well as libcups2 #27)
• Convert INSTALL to INSTALL.md
  (Pull request Markdown and Makefile updates for Install  #34)

Bug fixes:

• Prefer PDF again in PPDs for driverless printers
  PDF works better with finishing, especially combinations of multiple copies, collation, and stapling/binding (Issue Driverless no longer supports pdf #42, Pull request Prefer PDF again (fixes #42) #44).
• Use 0.5mm as tolerance when comparing page sizes
  For the PWG two page sizes are considered the same when the dimensions differ no more than 0.5 mm, libppd used too tight tolerances (Issue Wrong media limits for A4 paper using HP OfficeJet 7740 Pro due ignoring duplicated sizes in ppdCacheCreateWithPPD() #29, Pull request ppd-cache.c: Use 0.5mm for delta when comparing sizes #46).
• PPD generator: Check for required attributes when choosing input format
  Check for PCLm and PWG the minimum of attributes which we require during PPD generation. (Pull request ppd-generator.c: Check for urf-supported if we found image/urf #39, ppd-generator.c: Check for required attributes when choosing standard #40, Fedora issue).
• ppdLoadAttributes(): Improve check whether parameters are integer
  (Pull request ppd-ipp.c: Enhance integer conversion in ppdLoadAttributes() #38)
• ppdLoadAttributes(): Fix crash when page size could not get determined
  (Issue universal filter crashes when there is no valid default page size #31, Pull request ppd-ipp.c: Fix crash if ppd_size is NULL #37)
• Fix crash if there is no page size for "Custom"
  (Pull request ppd-emit.c: Fix crash if there is no page size for "Custom" #35, SEGV ppd-emit.c:905:22 in ppdEmitString() cups#849)
• Fix crash when incoming *ptr is NULL
  (Pull request raster-interpreter.c: Fix crash when incoming *ptr is NULL #28, same as Segmentation fault with raster-interpret.c:1055 cups#831)
• libcups2 compatibility: Use proper CUPS array callback function types
  Fixed CUPS array function call in libcups2 compatibility layer (Pull request Redefined function call with proper parameters  #33)
• Build system: Fix failure to correctly link to zlib
  Look up zlib properly with pkg-config (Pull request build: fix failure to correctly link to zlib #32)

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This discussion was created from the release libppd 2.1b1.