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Article #1888Re: How to be sure a window has been repainted
From: Christophe MINETTI
Date: Wed, 30 May 2007 05:38
Date: Wed, 30 May 2007 05:38
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Yes it turns around 70 msec to get a "stable" image. Images are vertical and horizontal grating and some full white screens. As I have to wait at least 70 msec and then wait the next synchro top of the camera, I am decreasing the acquisition frequency. If I decrease those 70 msec, than for sure I will get a mix of two frames. I was hoping (but I think there is no way to get it) to know by any way when the LCD has been completely refreshed ... Christophe > Ok, so the hardware is sending the signal to the pixels every 17 ms > Then each pixel takes what, 20 ms to turn on? > And you want a full frame, presumably, so you need to know the start > of the second refresh, (or wait 3 refresh times), plus the LCD > latency. So, somewhere around 70ms. Does that sound about right? > What is your "in practice" figure?
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X-Google-Thread: 10cc67,1db88f519055e05b X-Google-Attributes: gid10cc67,public,usenet X-Google-Language: ENGLISH,ASCII-7-bit Message-ID: <465D0DBA.F3D65804@ulb.ac.be> Date: Wed, 30 May 2007 07:38:03 +0200 From: Christophe MINETTI <cminetti@ulb.ac.be> X-Mailer: Mozilla 4.74 [en] (Windows NT 5.0; U) X-Accept-Language: en MIME-Version: 1.0 Newsgroups: borland.public.cppbuilder.nativeapi Subject: Re: How to be sure a window has been repainted References: <465B192D.18A0FD94@skynet.be> <k3tn53t0jd7bhqfu8c5idsca88ib4pss8e@4ax.com> <465C5E9C.2704298B@skynet.be> <op4p53t82bqqjft676ed9dcoiqachl1sln@4ax.com> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit NNTP-Posting-Host: 164.15.88.32 X-Trace: newsgroups.borland.com 1180503432 164.15.88.32 (29 May 2007 22:37:12 -0700) Lines: 16 Path: arc1-ca.pugleaf.net!g2news1.google.com!news3.google.com!proxad.net!proxad.net!feeder2-2.proxad.net!feeder1.cambrium.nl!feeder2.cambrium.nl!feed.tweaknews.nl!news.astraweb.com!border2.a.newsrouter.astraweb.com!feeder.news-service.com!newsfeed.freenet.de!newsfeed00.sul.t-online.de!newsfeed01.sul.t-online.de!t-online.de!newsgroups.borland.com!not-for-mail