NSCachedImageRep

Inherits From: NSImageRep : NSObject

Conforms To: NSCoding, NSCopying (NSImageRep) NSObject (NSObject)

Declared In: AppKit/NSCachedImageRep.h

Class Description

NSCachedImageRep, a subclass of NSImageRep, defines an object that stores its source data as a rendered image in a window, typically a window that stays off-screen. The only data that's available for reproducing the image is the image itself. Thus an NSCachedImageRep differs from the other kinds of NSImageReps defined in the Application Kit, all of which can reproduce an image from the information originally used to draw it. Instances of this class are generally used indirectly, through an NSImage object.

Initializing an NSCachedImageRep

• - (id)initWithSize:(NSSize)aSize Initializes a new NSCachedImageRep for an image of the depth:(NSWindowDepth)aDepth specified size and depth. The separate argument separate:(BOOL)separate specifies whether the image will get its own unique alpha:(BOOL)alpha cache, instead of possibly sharing one with other images. For best performance (although it's not essential), the alpha argument should be set according to whether the image will have a channel for transparency information.
• - (id)initWithWindow:(NSWindow *)aWindow Initializes the new NSCachedImageRep for an image to be rect:(NSRect)aRect drawn in the rectangle aRect of the specified window. This method retains aWindow.

• - (NSRect)rect Returns the rectangle where the image is cached.
• - (NSWindow *)window Returns the NSWindow where the image is cached.