Re: Win32 Semaphores in TThread?

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#1992

From: Dennis Jones
Date: Fri, 25 May 2007 16:45

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"Jonathan Benedicto" <invalid@nobody.com> wrote in message 
news:45f5f1ba$1@newsgroups.borland.com...
> Bob Gonder wrote:
>> But don't you want the MainThread to do the drawing since it owns the
>> canvas?
>> That's why I mentioned TThread::Synchronize( &Display );
>
> No, because that would penalize the speed. Ideally, the video thread 
> should perform the rendering, you just can't use SetDIBitsToDevice as it 
> is not thread-safe.

Depends on where the speed is needed.  If processing speed is more important 
than rendering speed, then an alternative to Synchronize would be to have 
the processing thread post 'render' messages to the message queue and let 
the main thread process those messages (and perform the rendering) whenever 
it can. This would allow the grabbing/processing thread to perform as fast 
as possible while still allowing rendering to occur in the main thread 
without resorting to a Synchronize call.

- Dennis

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Subject: Re: Win32 Semaphores in TThread?
Date: Fri, 25 May 2007 09:45:55 -0700
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