[Bf-cycles] Apple OpenCL and Cycles

Nazim Mer nazim.mer at gmail.com
Mon Dec 17 18:53:05 CET 2012

Can you post the directory in which the  device_opencl.cpp file is
contained in...(is this file the same among st all platforms)

as well as:
what the final file should look like once changes are made...

would enabling CPU based Opencl be a target for the official blender
build " but
certainly a good target for the next release."
i.e. Blender 2.65a....

On 17 December 2012 15:35, Ton Roosendaal <ton at blender.org> wrote:

> Hi Marcio,
> Our OS X platform maintainer - Jens Verwiebe - reported similar good
> results.
> It hasn't been taken further yet... but certainly a good target for the
> next release.
> Could you upload your compiled blender.app for others to check?
> -Ton-
> ------------------------------------------------------------------------
> Ton Roosendaal  Blender Foundation   ton at blender.org    www.blender.org
> Blender Institute   Entrepotdok 57A  1018AD Amsterdam   The Netherlands
> On 17 Dec, 2012, at 13:57, Marcio Andrade wrote:
> > Hello,
> >
> > I read that OpenCL development on Cycles is on hold, mainly because of
> compiler/driver problems in the AMD SDK. I have been doing some experiments
> with OpenCL on a Mac, and so far I did not encounter thouse kind of
> problems. After making some small changes to the kernel (basically enabling
> some defines that were commented out in kernel_types.h and fixing one
> compile error), I gave it a try.
> >
> > Compilation is fast and does not give memory errors. On my system the
> kernel is compiled in under 5 seconds. My Mac has a Intel HD 3000 GPU,
> which does not support OpenCL, so in order to make these tests I enabled
> OpenCL on the CPU (a small change to device_opencl.cpp). When I run the
> kernel in Blender, rendering time is close to the normal render using CPU,
> which is expected, since OpenCL Kernel on CPU should be close to the C++
> Kernel on CPU.
> >
> > Apple is the original author of OpenCL, and OpenCL support on Macs seems
> to be pretty decent (no need to install anything, it is already bundled).
> So, is there anyone else trying Cycles/OpenCL on Apple hardware ? I would
> like to know how OpenCL performs on a Mac with a true GPU, to see if its
> worth pursuing this direction.
> >
> >
> > Regards,
> > migueletto
> >
> > _______________________________________________
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> > Bf-cycles at blender.org
> > http://lists.blender.org/mailman/listinfo/bf-cycles
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