Graphics and Font Libraries

Depending on what your system will be used for, you may or may not require the graphics and font libraries. Most desktop machines will want them for use with graphical applications. Most servers on the other hand, will not require them.


Introduction to libjpeg

The libjpeg package contains libraries that allow compression of image files based on the Joint Photographic Experts Group standard. It is a "lossy" compression algorithm.

Package information

Installation of libjpeg

Install libjpeg by running the following commands:

./configure --enable-static --enable-shared --prefix=/usr &&
make &&
make install

Command explanations

./configure --enable-static --enable-shared --prefix=/usr: This command tells libjpeg to build both shared and static libraries and to install them with a base of /usr.

Configuring libjpeg

Configuration Information

As with most libraries, there is no configuration to do, save that the library directory i.e., /opt/lib or /usr/local/lib should appear in /etc/ so that ldd can find the shared libraries. After checking that this is the case, /sbin/ldconfig should be run while logged in as root.


The libjpeg package contains cjpeg, djpeg, jpegtran, rdjpgcom, wrjpgcom and libjpeg libraries.



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.


wrjpgcom inserts text comments into a JPEG file.

jpeg libraries

These libraries are used by many programs for reading and writing jpeg format files.