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README_PACKAGERS.md

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= Notes for Packagers =

== Patching Qt ==

Qt 5.6 is currently the recommended version to build Krita with on all platforms. However, Qt 5.6 on Linux needs to be patched for https://bugreports.qt.io/browse/QTBUG-44964 .

The patch in 3rdparty/ext_qt/qt-no-motion-compression.diff

== Package Contents ==

We recommend that all of Krita packaged in one package: there is no need to split Krita up. In particular, do not make a separate package out of the plugins directory; without the plugins Krita will not even start.

Krita does not install header files, so there is no need for a corresponding -dev(el) package.

== Third Party Libraries ==

The top-level 3rd-party directory is not relevant for packaging: it only contains CMake projects for all of Krita's dependencies which are used for building Krita on Windows and OSX. It is not called from the top-level CMakeLists.txt project.

There are four forks of 3rd party libraries that are relevant and cannot be replaced by system libraries:

  • plugins/impex/raw/3rdparty contains a fork of kdcraw. Upstread removed most functionality from this library and is in general unable to provide a stable API. The library has been renamed to avoid conflicts with upstream kdcraw.

  • plugins/impex/xcf/3rdparty contains the xcftools code. This has never been released as a library

  • plugins/extensions/gmic/3rdparty contains G'Mic. This has never been released as a shared library.

  • libs/image/3rdparty contains einspline. This code is directly linke d into the kritaimage library and has never been released as a separate library.

== Build flags ==

Krita no longer supports a build without OpenGL.

For alpha and beta packages, please build with debug output enabled, but for production packages the -DCMAKE_CXX_FLAGS="-DKDE_NO_DEBUG_OUTPUT" is recommended. A significant performance increase will be the result.

If you build Krita with RelWithDebInfo to be able to create a corresponding -dbg package, please define -DQT_NO_DEBUG=1 as well to disable asserts.

== Dependencies ==

Krita depends on:

  • boost and the boost-system library
  • eigen3
  • exiv2
  • fftw3
  • gsl
  • ilmbase
  • jpeg: Note that libjpeg-turbo is recommended.
  • lcms2
  • libraw
  • opencolorio
  • openexr
  • png
  • poppler-qt5
  • pthreads
  • qt-5: Note that Qt 5.6 is strongly recommended. Qt 5.5 has bugs that interfere with proper handling of tablet events
  • tiff
  • vc: this is a build-time dependency only
  • zlib

And the following KDE Frameworks:

  • Archive
  • Completion
  • Config
  • CoreAddons
  • GuiAddons
  • I18n
  • ItemModels
  • ItemViews
  • KCrash
  • WidgetsAddons
  • WindowSystem