Get pixels and colours from NSImage

Question

I have created an NSImage object, and ideally would like to determine how many of each pixels colour it contains. Is this possible?

Answer 1

Get an NSBitmapImageRep from your NSImage. Then you can get access to the pixels.

NSImage* img = ...;
NSBitmapImageRep* raw_img = [NSBitmapImageRep imageRepWithData:[img TIFFRepresentation]];
NSColor* color = [raw_img colorAtX:0 y:0];