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Java bindings for OpenCL

This site contains Java bindings for OpenCL, the Open Computing Language. OpenCL allows writing programs for heterogeneous platforms, that utilize CPUs or GPUs. More information about OpenCL may be found at the Khronos OpenCL website. The API of JOCL has been kept close to the original API of OpenCL. The functions are provided as static methods, and semantics and signatures of these methods have been kept consistent with the original library functions, except for the language-specific limitations of Java. You may browse the JOCL API documentation here, or obtain it as an archive in the Downloads section.

The following implementations of OpenCL are currently available:

• The ATI Stream SDK with support for OpenCL 1.0, version 2.0: ATI Stream SDK website
  
• The NVIDIA GPU Computing SDK with support for OpenCL 1.0, version 3.0: Download site for the NVIDIA GPU Computing SDK
• OpenCL in Apple Snow Leopard: OpenCL site at the Apple Developer Connection

News

2010-04-17: An experimental library for handling structs has been uploaded

• An experimental library has been added on the utilities page, which shows how OpenCL structs could be represented in Java.

2010-04-13: A utilitiy for tracing JOCL events has been uploaded

• This utiltity class may be used to show a bar plot of the commands that are associated with OpenCL events: More information is available on the utilities page.
  

2010-04-12: Update with bugfix for OpenCL / OpenGL interoperability

• An update to version 0.1.3a: Due to bug in the native library, the OpenGL interoperability did not work properly in the previous version. The updated source code and binaries are available in the downloads section.
  
  Thanks to Philipp Stelzer for finding the reason for this bug.
  
  Additionally, the samples section now contains a modified version of the simple GL example, which uses JOGL 2 to demonstrate the JOCL/JOGL interoperability.

2010-03-28/29: Binaries for Linux 32 bit and Windows 64 bit uploaded

• Pre-built binaries for 32bit Linux and 64 bit Windows are now available in the downloads section.

2010-03-24: Update to version 0.1.3

• The downloads section contains the new source code and pre-built binaries for 32bit Windows and 64bit MacOS. The MacOS binaries have been provided by Ryan Spicer from the School of Arts Media and Engieering at Arizona State University. Other binaries will be uploaded soon.
• The new version contains some bug fixes (see change log for details)
• Asynchronous operations are now possible. That means that clEnqueue* methods are no longer ignoring the 'blocking' flag.

2010-03-10: Binaries for MacOS 64 bit uploaded

• Pre-built binaries for 64bit MacOS are now available in the downloads section. Thanks to Ryan Spicer from the School of Arts Media and Engieering at Arizona State University for providing these binaries.

2010-02-21: Binaries for Windows 64 bit uploaded

• Pre-built binaries for 64bit Windows Vista are now available in the downloads section. The Visual Studio project file in the source code package has been updated to support 64bit systems.

2010-02-02: New samples uploaded

• Some new samples have been uploaded:
  One sample computes the Mandelbrot set using a "Quad-Float" data type, namely float4 values for which the computations are performed using some functions that have been ported from the Quad-Double package from http://crd.lbl.gov/~dhbailey/mpdist/index.html. This allows some high-precision computations even on devices that do not support double precision in hardware.
  Another sample shows how a simple image convolution may be performed with JOCL. The class that performs the convolution implements the java.awt.image.BufferedImageOp interface, and may thus be used easily as a replacement for the java.awt.image.ConvoleOp.

2010-01-29: Binaries for Linux 64 bit uploaded

• Pre-built binaries for 64bit linux are now available in the downloads section. Thanks to Ricardo Ferreira for providing these binaries.

2010-01-21: Update to version 0.1.2

• In the latest OpenCL implementations, the creation of a context requires passing in a non-null cl_context_properties object, which specifies the target platform. Due to an error in the context properties handling, this was not possible in JOCL version 0.1.1. This bug is now fixed, and the samples have been updated accordingly.
• When exceptions are enabled, the exception that is thrown due to errors in the source code during a call to clBuildProgram will now contain the build log which contains the error decription.

2010-01-07: JOCL forum opened

• A forum for discussion about JOCL has been opened at http://forum.byte-welt.de/forumdisplay.php?f=87&langid=2. Feel free to post your questions and discuss all aspects of JOCL there.

2009-12-14: Linux 32 bit binaries and makefiles uploaded

• The downloads section now contains binaries for Linux 32 bit, as well as makefiles for Linux in the source code package.
  

2009-12-10: Update to 0.1.1 - New samples - License changed to Lesser GPL

• JOCL has been updated to version 0.1.1, including minor bug fixes. Additionally, the new DLL should run with both NVIDIAs and AMDs latest OpenCL implementation.
• New samples demonstrating JOCL/JOGL interoperability and event handling and profiling have been added in the samples section.
• The license of JOCL has been changed to the Lesser GPL.

2009-12-01: OpenCL utilities for JOCL published

• The utilities that are used in the NVIDIA samples for OpenCL have been ported to Java. The library may be obtained at http://www.ithilian.com/jclu.

2009-11-12: Updated of AMD DLL for version beta4 of the Stream SDK

2009-11-04: General note about JOCL

• There exist Java Bindings for OpenCL which include a high-level object-oriented abstraction layer, which is based on direct bindings to OpenCL that are created with JNA. This project, named "OpenCL4Java", is hosted at http://code.google.com/p/nativelibs4java/wiki/OpenCL. There are considerations to combine the efforts of OpenCL4Java and JOCL, but the decision is still pending.

2009-11-04: MacOS binaries and project files

• Binaries for Mac OS X (10.6) and XCode project files have kindly been provided by Luca Lutterotti from the University of Trento, and are available in the Downloads section.

2009-10-19: Initial release of JOCL 0.1-beta

• The source code of JOCL 0.1-beta and the Windows 32bit binaries of JOCL for the AMD and the NVIDIA OpenCL implementation are available in the Downloads section.

(Change log)

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