Re: Getting Data out of NSImages
Re: Getting Data out of NSImages
- Subject: Re: Getting Data out of NSImages
- From: 陳銘崧 a.k.a. James Chen <email@hidden>
- Date: Sun, 10 Oct 2004 01:57:09 +0800
Hi,
You could get NSBitmapImagRep from NSImage and then access the pixels
via -bitmapData.
Getting NSBitmapImagRep from NSImage, you have iterate -representations
of NSImage and check its class which is -kindOf:[NSBitmapImagRep class]
one by one.
Note that the order of components are ARGB in meshed (non-planar)
format.
HTH,
James
------------------------------------
Ulead Systems Inc.
James Chen
Software Engineer
Image Div.
------------------------------------
On Oct 10, 2004, at 1:32 AM, Aaron Fothergill wrote:
further to this post. I've just found out that the TIFFRepresentation
*does* save out alpha, but Photoshop loads it in differently from the
way it does with TGAs, ie it pulls it as a layer and doesn't show a
separate Alpha channel :)
Ideally I'd still like to be able to get at the pixel data though if
anyone knows how.
Aaron
_____________________________
Aaron Fothergill : MD / Lead Coder
Strange Flavour Ltd
email@hidden
http://www.strangeflavour.com
On 9 Oct 2004, at 17:59, Aaron Fothergill wrote:
While I can save the TIFFRepresentation of an NSImage, it doesn't
contain any alpha information (and doing a setAlpha on the default
NSImageRep doesn't force it to either ;) ). How do I access the data
in an NSImage to save out the information I need, namely 32 bit RGBA
info ?
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