Kernel with argumrnt of type structures

Hi,

I am converting a OpenCL application to a Java-based version (using JOCL).
The kernel of this application has a structure type argument too,
My question is that how can we pass structure to the kernel from Java/JOCL application, or do we need to change the kernel ?

Many thanks

On 09/14/2011 03:51 PM, suleman [via jogamp] wrote:
> Hi,
>
> I am converting a OpenCL application to a Java-based version (using JOCL).
> The kernel of this application has a structure type argument too,
> My question is that how can we pass structure to the kernel from Java/JOCL
> application, or do we need to change the kernel ?
>
> Many thanks
>
you can pass them as ByteBuffers or generate a struct accessor with
gluegen (which is just a facade for the ByteBuffer).

julia3d uses structs in its kernels
https://github.com/mbien/jocl-demos/blob/master/src/com/jogamp/opencl/demos/julia3d/Julia3d.java#L203

https://github.com/mbien/jocl-demos/blob/master/src/com/jogamp/opencl/demos/julia3d/config.h

regards,
michael

--
http://michael-bien.com/

Hi Michael,

I know this is an old thread, but would it be possible for you to post the related .cfg file to generate Java classes for the structs in the julia3d config.h (or even better add it to the jocl-demos git repo? I've been studying the gluegen docs and been trying all sorts of options, but always only get empty classes & interfaces. Thanks a lot for all your efforts! Am creating a Clojure wrapper around JOCL and would love to support structs in an idiomatic way, but first need to study the gluegen translation/alignment logic more...

I'm not sure Michael will come back here soon. Maybe send him an email.

We appreciate your initiative, Xerxes reminded us during the Siggraph that JogAmp is a set of JVM bindings, not only for Java.

As far as I know, Sven is fixing some things in JOCL. If it is really a bug, please report it.

On 08/25/2012 01:26 AM, toxi [via jogamp] wrote:
> I know this is an old thread, but would it be possible for you to post the
> related .cfg file to generate Java classes for the structs in the julia3d
> config.h (or even better add it to the jocl-demos git repo? I've been studying
> the gluegen docs and been trying all sorts of options, but always only get
> empty classes & interfaces. Thanks a lot for all your efforts! Am creating a
> Clojure wrapper around JOCL and would love to support structs in an idiomatic
> way, but first need to study the gluegen translation/alignment logic more...

I I understand you properly here, 'idiomatic' is used for a
more natural integration of GlueGen into the JVM ?

AFAIK there is already a project to hook up
GlueGen w/ Java annotations, so it compiles c-header files to Java classes.
  <https://github.com/mbien/superglue/>
  <https://github.com/mbien/superglue/blob/master/testproject/src/foobar/StructGlueTest.java>

If your attempts of using GlueGen fail, pls have a look at GlueGen's unit tests.
They do include using GlueGen, i.e. creating function bindings and structs.

~Sven