Java Advanced Imaging ImageIO Tools

This article captures current information about the Java Advanced Imaging ImageIO Tools to document exactly what files are involved.

The ImageIO Tools consist of two jar files plus one or more files which are in native code for the platform.

1 JAR Files

File name	Description
jai_imageio.jar	JAR file containing core JAI Image I/O class files.	required
clibwrapper_jiio.jar.	codecLib JNI interfaces.	required.

2 Native Libraries

File name	Description	Platform
libclib_jiio.so	mediaLib JNI shared libraries	Linux
clib_jiio.dll	codecLib JNI shared libraries	Windows
clib_jiio_sse2.dll	mediaLib JNI DLL libraries	Windows
clib_jiio_util.dll	Utilities	Windows

3 Notes

1. The jar files are typically located in the Java jre/lib/ext directory.
2. The dll files are typically located in the Java jre/bin directory on a Windows system.
3. The so file is typically located in the Java jre/i386 directory on an Intel Linux system.
4. All the binary builds are available on https://jai-imageio.dev.java.net/binary-builds.html
5. The jar files are required.
6. The dll/so files just provide acceleration for certain image types.
7. The dll/so files may provide support for additional image types.
8. You can force the ImageIO Tools not to use the native libraries by starting a program with this switch:

-Dcom.sun.media.imageio.disableCodecLib=true

At one time, the following was true:

If use of native code is disallowed then the JPEG and PNG reader-writer plug-ins and some accelerations used for bilevel TIFF compression will not be available nor will the native implementation of the JPEG 2000 reader-writer plug-in; the JavaTMimplementation of the JPEG 2000 plug-in will however be available. The respective plug-ins will detect that native libraries cannot be used and respond accordingly.