NSImage size not real size with some pictures?

Question

I see that sometimes NSImage size is not real size (with some pictures) and CIImage size is always real. I was testing with this image.

This is source code which I w

Answer 1

Thanks to Zenopolis for the original ObjC code, here's a nice concise Swift version:

func sizeForImageAtURL(url: NSURL) -> CGSize? {
        guard let imageReps = NSBitmapImageRep.imageRepsWithContentsOfURL(url) else { return nil }
        return imageReps.reduce(CGSize.zero, combine: { (size: CGSize, rep: NSImageRep) -> CGSize in
            return CGSize(width: max(size.width, CGFloat(rep.pixelsWide)), height: max(size.height, CGFloat(rep.pixelsHigh)))
        })
    }