I removed the use of the NSBitmapImageRep as you suggested and it is working
much better now.
Thanks for the help
-dave


On Tue, Feb 24, 2009 at 10:10 AM, douglas welton <
[email protected]> wrote:

> David,
>
> perhaps I'm missing something simple...  Is there some reason that you are
> using NSBitmapImageRep to handle the jpg file?
>
> why not use CGImageSource to read your jpg file, create a CGImage from the
> CGImageSource, draw the new CGImage into a CGBitmapContext, do your
> additional drawing; and then extract a final CGImage from the
> CGBitmapContext with CGBitmapContextCreateImage?
>
> regards,
>
> douglas
>
>
>
> On Feb 24, 2009, at 12:41 PM, David Alter wrote:
>
>  What I want to do is create the NSBitmapImageRep from a jpg. Draw into the
>> image and extract a CGImageRef out. I need to be able to access
>> the individual pixels of the image. Maybe there is a better way to do
>> this?
>>
>>
>
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