In case it wasn't clear, Aik-Siong forwarded this private correspondence after I suggested that others might be interested.

Cheers,
Josh



On Jun 7, 2010, at 7:31 AM, askoh wrote:

> 
> Feel free to ask these questions on-list; others might be interested.
> 
> On Jun 6, 2010, at 7:20 PM, askoh at askoh.com wrote:
> 
>> Josh:
>> 
>> I would like to use OpenCL and OpenGL interop where they share buffers
>> for graphics.
> 
> That would be great!
> 
> 
>> Anything to prevent that now?
> 
> Yes, some work still needs to be done, but nothing too difficult.
> 
> 
>> What needs to be done?
> 
> In order to share buffers with OpenGL, the OpenCL context-creation function
> needs to be passed a handle to the OpenGL context. Unfortunately, if you're
> using the Croquet-OpenGL bindings, the context is not readily accessible...
> a primitive in the B3DAcceleratorPlugin (#primCreateRenderer:x:y:w:h:)
> abstracts away context-creation (hiding whether the renderer uses Direct3D
> or OpenGL, and other messy stuff, eg: on some platforms creating a child
> window for the OpenGL context to draw into). After all of this, it returns
> an integer that acts as a Squeak-specific handle to the renderer.
> 
> In short, what needs to be done is to obtain the pointer. This will require
> modifications to the B3DAcceleratorPlugin. The easiest thing to do would be
> to add another primitive that takes the integer renderer-handle and returns
> a pointer (possibly as an ExternalAddress?) to the OpenGL context. This can
> then be passed to clCreateContext(). I haven't added convenience methods to
> use clCreateContext() in such a fashion, but this should be a
> straightforward extension of my existing code (feel free to ask more
> questions if this isn't clear).
> 
> Of course, if you get this working, I'll be glad to integrate any patches
> you provide, and to help you bug the VM people to integrate it as well.
> 
> Cheers,
> Josh
> 
> 
> 
>> 
>> Thanks,
>> Aik-Siong
>> 
> 
> -- 
> View this message in context: http://forum.world.st/OpenCL-and-OpenGL-interop-tp2246017p2246017.html
> Sent from the Squeak - Dev mailing list archive at Nabble.com.
>