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NSReadPixel crash

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NSReadPixel crash

Subject: NSReadPixel crash
From: Alexander Cohen <email@hidden>
Date: Fri, 02 Nov 2007 13:15:59 -0400

I'm using NSReadPixel in a mouseMoved event on a view to read the color of a pixel where the mouse is and display it to the user. ON 10.5 all is good. If i use the same images on 10.4, once in a while, i'll get a crash. And the log is not very helpfull, it just ends with the said function. In any case, here's how i'm getting the color:

[self lockFocus]; NSColor* c = NSReadPixel(pt) // got point from a [self convertPoint ...] using the event from the mouseMoved message [self unlockFocus]

What could cause NSReadPixel to crash straight out like that?

thanks

AC
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