screen redraw problem

[J S]

Thanks for the help I got on this from Harold and Alan. The application was 
written in-house and after I asked the client for the source code, they 
managed to find the error themselves. For some reason, this only showed up 
in XFree86 though (not Exceed or Sun X-Windows). Here's what they said:

"An XWindows Draw function was taking a clipping area as a parameter. Under 
Xfree86, depending on what you are doing, invalid clipping areas were being 
generated and so the Draw function was causing screen distortions. I have 
put a validation in which checks the clipping area and if invalid it does 
not paint. In the old days when I used to work on the Windows SDK and 
OS2/Presentation Manager we used to hit similiar problems. This fix appears 
to be working."

>JS,
>
>Can you tell us about the application - is it available anywhere so I
>can take a look too ?
>
>Alan.

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