Trouble with area fixing using ValidateRect(). The best way to optimize the code

JOHN 602

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9 Oct 2012CPOL

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Hello everyoneI'm trying to resolve the problem with image blinking and I almost get it ,but I got some problems.I want to redraw all the rest of the window except only the image. I'm trying to throw the Image's rectangle(i.e.coordinates) into ValidateRect and perform rendering but...

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1. Trouble with area fixing using ValidateRect(). The best way to optimize the code

9 Oct 2012JackDingler

Allocate an empty bitmap the size of your display area.Make a memdc for this image.Call CDC::FillSolidRect(&ClientRect, 0x00FFFFFF); to clear it to the back ground color.BitBlt your bitmap to this DC.Bitblt this DC to your window.

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MFC

2. Trouble with area fixing using ValidateRect(). The best way to optimize the code

8 Oct 2012michaelmel

I don't think you can avoid flicker without double buffering. The flicker occurs because memory associated with the image on the display is updated at the same time as the hardware pushes pixels to the screen. Have a look at:Don't Flicker! Double Buffer![^]

C++

MFC

3. Trouble with area fixing using ValidateRect(). The best way to optimize the code