Beyond Linux® From Scratch (systemd Edition) - Version 11.0

Chapter 10. Graphics and Font Libraries

libjpeg-turbo-2.1.1

Introduction to libjpeg-turbo

libjpeg-turbo is a fork of the original IJG libjpeg which uses SIMD to accelerate baseline JPEG compression and decompression. libjpeg is a library that implements JPEG image encoding, decoding and transcoding.

This package is known to build and work properly using an LFS-11.0 platform.

Package Information

libjpeg-turbo Dependencies

Required

CMake-3.21.2 and NASM-2.15.05 or yasm-1.3.0

User Notes: https://wiki.linuxfromscratch.org/blfs/wiki/libjpeg-turbo

Installation of libjpeg-turbo

Install libjpeg-turbo by running the following commands: 

mkdir build &&
cd    build &&

cmake -DCMAKE_INSTALL_PREFIX=/usr \
      -DCMAKE_BUILD_TYPE=RELEASE  \
      -DENABLE_STATIC=FALSE       \
      -DCMAKE_INSTALL_DOCDIR=/usr/share/doc/libjpeg-turbo-2.1.1 \
      -DCMAKE_INSTALL_DEFAULT_LIBDIR=lib  \
      .. &&
make

To test the results, issue: make test.

[Note]

Note

If installing libjpeg-turbo over an older jpeg installation, not all library symbolic links are updated properly. To fix this before installation, run the following as the root user: 

rm -f /usr/lib/libjpeg.so*

Now, as the root user: 

make install

Command Explanations

-DWITH_JPEG8=ON: This switch enables compatibility with libjpeg version 8.

Contents

Installed Programs: cjpeg, djpeg, jpegtran, rdjpgcom, tjbench, and wrjpgcom
Installed Libraries: libjpeg.so and libturbojpeg.so
Installed Directories: /usr/share/doc/libjpeg-turbo-2.1.1

Short Descriptions

cjpeg

compresses image files to produce a JPEG/JFIF file on the standard output. Currently supported input file formats are: PPM (PBMPLUS color format), PGM (PBMPLUS gray-scale format), BMP, and Targa

djpeg

decompresses image files from JPEG/JFIF format to either PPM (PBMPLUS color format), PGM (PBMPLUS gray-scale format), BMP, or Targa format

jpegtran

is used for lossless transformation of JPEG files

rdjpgcom

displays text comments from within a JPEG file

tjbench

is used to benchmark the performance of libjpeg-turbo

wrjpgcom

inserts text comments into a JPEG file

libjpeg.so

contains functions used for reading and writing JPEG images

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