Beyond Linux® From Scratch - Version 2012-01-16

Chapter 9. Graphics and Font Libraries

libjpeg-8c

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.

This package is known to build and work properly using an LFS-7.0 platform.

Package Information

User Notes: http://wiki.linuxfromscratch.org/blfs/wiki/libjpeg

Installation of libjpeg

Install libjpeg by running the following commands: 

./configure --prefix=/usr &&
make

To test the results, issue: make test.

Now, as the root user: 

make install

Contents

Installed Programs: cjpeg, djpeg, jpegtran, rdjpgcom, and wrjpgcom
Installed Library: libjpeg.{so,a}
Installed Directories: None

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.

wrjpgcom

inserts text comments into a JPEG file.

libjpeg.{so,a}

library is used by many programs for reading and writing JPEG format files.

Last updated on 2011-10-26 04:34:14 +0000