Copyright ã1995 by NeXT Computer, Inc.  All Rights Reserved.

IOScreenRegistration

Adopted By:	The event system

Declared In:	driverkit/eventProtocols.h

Protocol Description

Display drivers use the messages in the IOScreenRegistration protocol to register and unregister themselves with the event system. These methods are called by IODisplay in response to an getIntValues:forParameter:count: call that specifies the ªIO_Framebuffer_Registerº parameter. 

You shouldn't need to invoke the methods in this protocol, because they're already invoked automatically by IOFrameBufferDisplay and IOSVGADisplay.

Instance Methods

registerScreen:bounds:shmem:size:

- (int)registerScreen:(id)instance 
bounds:(Bounds *)bounds 
shmem:(void **)address 
size:(int *)num 

Registers instance as a display driver. Returns a token that's used to refer to the display in other calls to the event system.

unregisterScreen:

- (void)unregisterScreen:(int)token 

Unregisters the instance associated with token as a display driver.