iphone - Grabbing image of UIScrollView content - anti-aliasing problem -

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i need grab scaled image of content visible in uiscrollview. i'm able image there discrepancy between anti-aliasing algorithm used scroll view , grabbing process. please @ image point:

(left: seen in uiscrollview, right: grabbed renderincontext)

the image

i tried set interpolation quality, edge antialiasing mask , allow/force anti-alias in context using cgcontextsetallowsantialiasing , cgcontextsetshouldantialias without success. image saved file png uiimagepngrepresentation.

any ideas how grab exact copy of visible in scroll view?


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