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Re: Obtaining unpremultiplied bitmap from PNG file

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Re: Obtaining unpremultiplied bitmap from PNG file

Subject: Re: Obtaining unpremultiplied bitmap from PNG file
From: "Barry" <email@hidden>
Date: Thu, 14 Jun 2007 10:34:07 +0100

I need to write an app which manipulates raw image data, so I found these comments worrying.

<<<<<<<<<<<<<<<<
As far as I can tell, Cocoa simply won't give you non-premultiplied
bitmap data. The CG constant kCGImageAlphaLast ( IIRC ) is there, but
isn't actually implemented.


Then I found the following:

How do I access the pixel data of a CGImage object?
at
http://developer.apple.com/qa/qa2007/qa1509.html

Is this a solution ???

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