[Interest] Qt and OpenCL crash course

[Jason H]

I've been reading the samples and it seems to make perfect sense, aside from that whole kernel program language.

I was hoping someone would say:
QPainter is OpenCL enabled by default (or enabled with a switch), all the operations happen automatically because the kernel programs for applicable painter operations are already written. 




________________________________
 From: Paul Miller <paul at fxtech.com>
To: Jason H <scorp1us at yahoo.com>; "interest at qt-project.org" <interest at qt-project.org> 
Sent: Wednesday, March 12, 2014 4:02 PM
Subject: Re: [Interest] Qt and OpenCL crash course
 

On 3/12/2014 2:48 PM, Jason H wrote:
> Thanks, I worry about code that hasn't been touched in over 3 years.
> That's a lifetime on the internet.
>
> Do you have experience with it?
> Does it play nice with Qt5?

Yeah, I played around with it a couple of years ago, but I ended up 
writing my own OpenCL wrapper because my code needed to run separately 
from Qt.

There are some really nice ideas in there though. I expect it should 
work with Qt 5, maybe with a few minor alterations to some headers. At 
the very least it should have some nice examples of how to use OpenCL 
with Qt objects, such as QImage.

>
> Thanks!
>
> ------------------------------------------------------------------------
> *From:* Paul Miller <stelefx at gmail.com>
> *To:* interest at qt-project.org
> *Sent:* Wednesday, March 12, 2014 3:38 PM
> *Subject:* Re: [Interest] Qt and OpenCL crash course
>
> On 3/12/2014 2:08 PM, Jason H wrote:
>
>  > I need to do some elementary graphics operations on QPixmap or QImage. I
>  > can do these in Qt to some extent already. But for this latest project I
>  > will be processing 4k resolution images.
>  > My operations are:
>  > Translate off origin
>  > Rotate by an acute angle (around a point sometimes not in the image)
>  > Pixel value normailzation
>  >
>  > To what extent does Qt support these operations in a hardware
>  > accelerated manner? Or how hard is it for me to use the hardware to
>  > produce those functions to inter-operate with Qt?
>
>
> Take a look at QtOpenCL: http://doc.qt.digia.com/opencl-snapshot/
>
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