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41 lines
1.9 KiB
Text
41 lines
1.9 KiB
Text
mozjpeg (Mozilla JPEG Encoder Project)
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mozjpeg is a fork of libjpeg-turbo from Mozilla Research. Its goal is to
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reduce the size of JPEG files without reducing quality or compatibility
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with the vast majority of the world's deployed decoders. The idea is to
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reduce transfer times for JPEGs on the Web, thus reducing page load times.
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mozjpeg is not intended to be a general JPEG library replacement. It makes
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tradeoffs that are intended to benefit Web use cases and focuses solely
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on improving encoding. It is best used as part of a Web encoding workflow.
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In essence, libjpeg-turbo (as shipped with Slackware) is optimized for
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speed of encoding/decoding, while mozjpeg is optimized for encoding
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smaller file sizes (at the expense of speed). mozjpeg will not interfere
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with Slackware's libjpeg-turbo package, as it installs to /opt/mozjpeg/.
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mozjpeg supports multiple versions of the libjpeg API. By default,
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version 6b is built. If you need compatibility with libjpeg 7 or 8,
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set API=7 or API=8 in the script's environment.
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Optionally, mozjpeg can be built with Java wrapper support for
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turbojpeg. To do this, install one of: jdk, openjdk, openjdk8, or
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openjdk6. Then run this script with JAVA=yes in the environment.
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To run the binaries, it's probably easiest to add this to ~/.bash_profile:
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export PATH=/opt/mozjpeg/bin:$PATH
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export MANPATH=/opt/mozjpeg/man:$MANPATH
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To compile & link with the mozjpeg libraries, use -I/opt/mozjpeg/include
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and -L/opt/mozjpeg/lib (or lib64). You might also want -static, or
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else -Wl,-rpath,/opt/mozjpeg/lib (or lib64). Starting with version 3.2,
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there's also pkg-config support for mozjpeg. In ~/.bash_profile:
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export PKG_CONFIG_PATH=/opt/mozjpeg/lib64/pkgconfig:$PKG_CONFIG_PATH
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(chage lib64 to lib, for 32-bit Slackware)
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If you built with JAVA=yes, the java library will be installed
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as /opt/mozjpeg/classes/turbojpeg.jar, and the docs will be in
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/usr/doc/mozjpeg-$VERSION/javadoc.
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