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putMapBuffer on CPU-based OpenCL devices

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suleman

putMapBuffer on CPU-based OpenCL devices

Hi,

I have two questions.
(1) Is putMapBuffer (CLCommandQueue class) used on CPU based OpenCL devices results in no-copy on CPU devices?
(2) "putMapBuffer" method always returns a ByteBuffer? am i required to cast this bytebuffer to other types or not? Any example will be great. e.g. i have a flot buffer and i want to map this instead of using putReadBuffer and putWriteBuffer buffers on CPUs

Thanks

Michael Bien

Re: putMapBuffer on CPU-based OpenCL devices

On 06/27/2011 06:04 PM, suleman [via jogamp] wrote:

> Hi,
>
> I have two questions.
> (1) Is putMapBuffer (CLCommandQueue class) used on CPU based OpenCL devices
> results in no-copy on CPU devices?
> (2) "putMapBuffer" method always returns a ByteBuffer? am i required to
> cast this bytebuffer to other types or not? Any example will be great. e.g.
> i have a flot buffer and i want to map this instead of using putReadBuffer
> and putWriteBuffer buffers on CPUs
>
> Thanks
>

1) yes probably. Same as putRead/WriteBuffer - but thats implementation
dependent
2.) bytebuffer.asFooBuffer(). You are not required to change the view of
the buffer, you can just use the ByteBuffer view, it exposes the
functionality of all specific buffers.
http://download.oracle.com/javase/6/docs/api/java/nio/ByteBuffer.html

regards,
michael

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