SheffieldKevin

/**
 @brief Returns true if images have same meta. Width, Height, bit depth.
 @discussion Assumes images are non null.
*/
func doImagesHaveSameMeta(#image1:CGImage, #image2:CGImage) -> Bool {
    if CGImageGetWidth(image1) != CGImageGetWidth(image2) {
        return false
    }
    
    if CGImageGetHeight(image1) != CGImageGetHeight(image2) {