Re: NSReadPixel returning different colors
Re: NSReadPixel returning different colors
- Subject: Re: NSReadPixel returning different colors
- From: Richard Holliday <email@hidden>
- Date: Mon, 08 Jan 2007 07:16:35 -0800
On Monday, January 08, 2007, at 10:07AM, "Andreas Mayer" <email@hidden> wrote:
>
>Am 08.01.2007 um 15:32 Uhr schrieb Richard Holliday:
>
>> The original pixel color in the PNG file is R:153 G:255 B:153.
>>
>> On the 10.4 machine I get back R: 0.6 G: 1.0 B: 0.6
>> On the 10.2 machine I get back R: 0.53 G: 1.0 B 0.53
>>
>> I understand this is being color adjusted by the system but I just
>> need the raw values with nothing adjusted in any way.
>
>You mean on 10.2? Well, that might just be a bug.
>
>The values reported from 10.4 are without any adjustment. 0.6*255 = 153
>
Correct, the 10.4 values are fine it's just from 10.2.8.
Also, I tried my own code which returns the RGB values via the [NSBitmapImageRep bitmapData] member. This has exactly the same problem which lead me to believe I'm missing something else. As soon as the PNG becomes an NSImage the data gets translated some how?
There must be a way to get the original data before OSX / Cocoa "messes" with it.
Richard
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