This subclass of NSImageRep stores an image's data representation as an image that has been rendered into a window, which is usually an off-screen window. Images represented by NSCachedImageRep can be redrawn very quickly as they have already been rendered to the screen environment.

@interface NSCachedImageRep : NSImageRep
// Initializers
- (id)initWithSize:(NSSize)size depth:(NSWindowDepth)depth separate:(BOOL)flag alpha:(BOOL)alpha;
- (id)initWithWindow:(NSWindow *)win rect:(NSRect)rect;
// Instance Methods
- (NSRect)rect;
- (NSWindow *)window;