how to release CGImageRef when i call CGContextDrawImage????

Subject: how to release CGImageRef when i call CGContextDrawImage????
From: simon Scylla <email@hidden>
Date: Fri, 13 Nov 2009 14:34:44 +0800
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i write a sample code ,it draw a memory buffer,using   CGImageRef  and CGContextDrawImage.but,wwhen i want to release CGImageRef  ,some error occur:bus error

   my code is like:

 CGContextDrawImage(viewContext, bounds, image);
 CGImageRelease(image);

what should i do? using code search ,i found that there are a lot of code like mine.....

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