Re: altering an NSImage by access to pixels
Re: altering an NSImage by access to pixels
- Subject: Re: altering an NSImage by access to pixels
- From: Kyle Sluder <email@hidden>
- Date: Thu, 18 Aug 2011 16:26:36 -0700
On Thu, Aug 18, 2011 at 4:23 PM, David Duncan <email@hidden> wrote:
> On Aug 18, 2011, at 4:16 PM, James Walker wrote:
>
>> Let's say I have an NSImage that contains some representation other than an NSBitmapImageRep, and I want to play with the pixel values.
>
>
> Create your NSBitmapImageRep
> Create a NSGraphicsContext from that rep and make it current
> Draw your NSImageRep using -draw (or -drawAtPoint: or -drawInRect:) to draw into the current graphics context.
>
> You now have an NSBitmapImageRep with your image contents.
I'd point you at the Snow Leopard AppKit release notes, which contain
a very long discussion about this topic (presumably written by David),
but it seems there are only the Lion and Leopard versions available
online. :(
--Kyle Sluder
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