libcupsfilters 2.1b1

[tillkamppeter]

First beta release for libcupsfilter 2.1.0.

New features (more to come):

• Support for building with libcups3, CUPS library of CUPS 3.x.
• Support for building with libcups of CUPS 2.5.x (Issue Updates to conform to CUPS 2.5.x #36)
• CI/build/unit testing of filter functions using a table of test cases, each with input file, input and output formats, option settings, allows especially to create regression test cases based on reported bugs
• Convert INSTALL to INSTALL.md
  (Pull request Markdown updates #45)
• Add GitHub workflow for Canonical Open Documentation Academy
  OpenPrinting is participating in Canonical's Open Documentation Academy, as an organization in need of documentation. The workflow is still experimental and serves for auto-forwarding documentation-related issues.

Bug fixes:

• Always use sRGB/sGray if driver is PWG/URF and RGB/Gray is requested
  PWG Raster and Apple Raster (URF) are for driverless printing abd require the sRGB and sGRay standard color profiles (Pull request raster.c: Use sRGB if driver is pwg/urf and has ColorModel option #51).
• raster_base_header(): Several fixes on color space selection
  Internal (static) function to create a CUPS or PWG Raster header from scratch, without using data of a PPD file, only IPP attributes and command line options. Fixes are done to make sure a monochrome color space is used for monochrome printers, the actual color space seletions (if supported) is used for PWG Raster, not always sRGB 8-bit, and DeviceN can be selected also without specifying the depth (Issue universal filter generates RGB image/urf for the monochrome printer #38).
• Fix content data stream concatenation mangling output in cfFilterPDFToPDF()
  In cfFilterPDFToPDF() add newline after each content stream in ::provideStreamData. When concatenating the data streams for the page's contents, add a new line at the end of each data stream to avoid cases where the concatenation might result in a corruption (Pull request Fix content data stream concatenation mangling output in cfFilterPDFToPDF #56).
• cfCatalogLoad(): Fix incorrect strncpy() limit calculation
  Preserve the new allocated size in a variable and use it instead of sizeof() (Pull request cfCatalogLoad: fix incorrect strncpy() limit calculation #49).
• Remove redundant data type definition in libcups2-private.h
  (Pull request Remove redundant definitions libcups2-private.h #44)
• pdf-cm.cxx: Fix possible integer overflow
  (Issue Possible INTEGER_OVERFLOW in filter/pdftopdf/qpdf_cm.cc #42, Pull request qpdf-cm.cxx: Fix possible integer overflow #43)
• cfImageCMYKToCMY(): Fixed copy-and-paste error
  (Issue Possible BAD_COPY_PASTE in cupsfilters/image-colorspace.c #41)
• Fix compilation with clang and libc++
  Define _GLIBCXX_THROW to empty for C++ 11 and newer.
  (Issue fails to build with libc++ by default #35, Pull request Fix compilation with clang and libc++ #47)
• Fix warnings reported by clang 17
  (Pull request Fix warnings reported by clang 17 #48)
• pkgconfig: Add '-I${includedir}' to Cflags
  This way, includes prefixed with the "cupsfilters/" directory path also work. Especially libppd build also without problem when libcupsfilters is installed in a non-default path (Pull request pkgconfig: Add '-I${includedir}' to Cflags #57).
• .gitignore: Ignore temporary files created by the build tests
• INSTALL.md: Updated dependencies
  We also need: gettext, libcups2-dev, libqpdf-dev (Pull request Revise building docs and add testing instructions #59)
• INSTALL.md: Tell that we have make check for build testing
  (Pull request Revise building docs and add testing instructions #59)

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This discussion was created from the release libcupsfilters 2.1b1.