Re: Drawing noise in Cocoa (preferably fast)
Re: Drawing noise in Cocoa (preferably fast)
- Subject: Re: Drawing noise in Cocoa (preferably fast)
- From: Scott Ellsworth <email@hidden>
- Date: Fri, 17 Jun 2011 18:45:33 -0700
That seems a bit strange - have you put the code up somewhere?
Scott
On Fri, Jun 17, 2011 at 4:24 PM, Stephen Blinkhorn
<email@hidden> wrote:
>
> On 17 Jun 2011, at 10:30, Stephen Blinkhorn wrote:
>
>> Saying that, I've found that the CPU requirements of the raw drawing code
>> (even with relatively fast refresh rates of 20-25 FPS) pales into
>> insignificance when compared to the objective-c messaging overhead of
>> co-ordinating the redrawing. Cocoa seems to need to do a lot of leg work
>> with respect to view drawing.
>
> Just to clarify that last sentence. I'm referring to the CPU requirements of
> drawing relatively simple graphics e.g. bezier paths, filled rects and some
> CGLayers (not 10,000 X 10,000 areas of noise!).
>
> Stephen
>
>
>>
>> Anyway, glad I learnt all about CIImage!
>>
>> Thanks,
>> Stephen
>>
>>
>>>
>>> Cheers,
>>> -- Uli Kusterer
>>> "The Witnesses of TeachText are everywhere..."
>>> http://groups.yahoo.com/group/mac-gui-dev/
>>>
>>>
>>>
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