altering an NSImage by access to pixels
altering an NSImage by access to pixels
- Subject: altering an NSImage by access to pixels
- From: James Walker <email@hidden>
- Date: Thu, 18 Aug 2011 16:16:35 -0700
Let's say I have an NSImage that contains some representation other than
an NSBitmapImageRep, and I want to play with the pixel values. My plan
was like this:
Create a NSBitmapImageRep of the same size as my source image.
Make a new NSImage and add my new representation to it.
Lock focus on the new image.
Draw the source image.
Unlock focus on the new image.
Access the pixels of the bitmap representation.
However, the part about locking focus, drawing, and unlocking focus
changes my NSImage so that its representation is no longer of class
NSBitmapImageRep. Gaah. Must I drop down to the Core Graphics level to
do what I want?
--
James W. Walker, Innoventive Software LLC
<http://www.frameforge3d.com/>
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