Beyond Linux® From Scratch (systemd Edition) - Version r13.0-1289

Chapter 10. Graphics and Font Libraries

gegl-0.4.70

Introduction to gegl

This package provides the GEneric Graphics Library, which is a graph based image processing format.

[Note]

Note

This package is known to build and work properly using an LFS 13.1 platform.

Package Information

Required

babl-0.1.128 and json-glib-1.10.8

Recommended

GLib-2.88.3 (with GObject Introspection), Graphviz-15.1.1 (build with pango and libpng), Pygments-2.20.0, and PyGObject-3.56.3

Optional

asciidoc-10.2.1, Cairo-1.18.4, FFmpeg-9.0.1 (currently broken), gdk-pixbuf-2.44.7, gexiv2-0.16.2, GTK-Doc-1.36.1, jasper-4.2.9, Little CMS-2.19.1, libraw-0.22.2, librsvg-2.62.3, libspiro-20220722, tiff-4.7.2, libwebp-1.6.0, luajit-20260213, Pango-1.58.2, Poppler-26.08.0, Ruby-4.0.6, sdl2-compat-2.32.70, v4l-utils-1.32.0, Vala-0.56.19, lensfun, libnsgif, libumfpack, maxflow, MRG, OpenCL, OpenEXR, poly2tri-c, source-highlight, and w3m

Installation of gegl

If you are installing over a previous version of gegl, one of the modules will need to be removed. As the root user, run the following command to remove it: 

rm -f /usr/lib/gegl-0.4/vector-fill.so

Install gegl by running the following commands: 

mkdir build &&
cd    build &&

meson setup --prefix=/usr --buildtype=release .. &&
ninja

To run the tests, issue: ninja test. Many tests are skipped depending on what optional dependencies are installed. Fourteen tests are known to fail in the gegl:ff-load-save portion of the test suite due to incompatibilities with recent versions of ffmpeg.

Now, as the root user: 

ninja install

Command Explanations

-D docs=true: Use this switch to build and install the documentation (requires GTK-Doc-1.36.1).

Contents

Installed Programs: gegl and gegl-imgcmp
Installed Libraries: libgegl-0.4.so, libgegl-npd-0.4.so, and modules in /usr/lib/gegl-0.4
Installed Directories: /usr/lib/gegl-0.4 and /usr/include/gegl-0.4

Short Descriptions

gegl

is a commandline tool for interfacing with the gegl library

gegl-imgcmp

is a simple image difference detection tool for use in regression testing

libgegl-0.4.so

provides infrastructure to do demand based cached non destructive image editing on larger than RAM buffers

libgegl-npd-0.4.so

is the GEGL N-point image deformation library