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: The Karl Adam <email@hidden>
- Date: Thu, 18 Aug 2011 16:31:59 -0700
Hey David,
Why not just use the
CGDataProviderCopyData(CGImageGetDataProvider(imageRef)) to create a
new NSBitmapImageRequest with the image's original data? Is drawing it
more performant or gives you a better more compact data
representation?
_Karl
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.
> --
> David Duncan
>
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