#### Beyond Linux® From Scratch (System V Edition) - Version 12.1

### Chapter 10. Graphics and Font Libraries

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# gegl-0.4.48

## Introduction to gegl

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

This package is known to build and work properly using an LFS 12.1 platform.

### Package Information

- Download (HTTP): https://download.gimp.org/pub/gegl/0.4/gegl-0.4.48.tar.xz

- Download MD5 sum: a96ae32d46855ab4eefa1fce2dbefda1

- Download size: 5.5 MB

- Estimated disk space required: 80 MB (Add 4 MB for tests)

- Estimated build time: 0.7 SBU (add 0.1 SBU for tests, both with parallelism=4)

### gegl Dependencies

#### Required

babl-0.1.108 and JSON-GLib-1.8.0

#### Recommended

gobject-introspection-1.78.1, Graphviz-10.0.1 (build with pango), Pygments-2.17.2, and PyGObject-3.46.0

#### Optional

asciidoc-10.2.0, Cairo-1.18.0, FFmpeg-6.1.1, gdk-pixbuf-2.42.10, gexiv2-0.14.2, GTK-Doc-1.33.2, JasPer-4.2.0, Little CMS-2.14, libraw-0.21.2, librsvg-2.57.1, libtiff-4.6.0, libwebp-1.3.2, Pango-1.51.2, Poppler-24.02.0, Ruby-3.3.0, SDL2-2.30.0, v4l-utils-1.26.1, Vala-0.56.14, libspiro-20220722, LuaJIT, lensfun, LuaJIT, libnsgif, libumfpack, maxflow, MRG, OpenCL, OpenEXR, poly2tri-c, source-highlight, and w3m

## Installation of gegl

If installing over a previous version of gegl, one module needs to be removed. As the `root` user, run:

    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. 7 tests in the `gegl:ff-load-save` portion of the test suite are known to fail due to incompatibilities with ffmpeg-6.0.

Now, as the `root` user:

    ninja install

## Command Explanations

`-Ddocs=true`: Build and install documentation (requires GTK-Doc-1.33.2,).

## 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 working with the XML data model
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

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