shaw@uunet.uu.net (shaw) (03/14/89)
I know that if the screen is changed during a screendump, for example by mouse movement or by the clock hands changing, then the rasterfile may be corrupted and screenload will fail. I have seen warnings about this in Sun's manuals and in articles in Sun-spots. But what I have not seen is an explanation. Why? What is it about the method of extracting information from the frame buffer or about the representation of rasterfiles that makes screendump so touchy? Why, for instance do you not just get a "blur" or "double exposure" or undefined pixels confined to the region in which there was movement? There must be something more tricky about this operation than it would appear to the casual observer. I dont see the problem. Guy Shaw Paralogics uunet!paralogics!shaw