1/* 2 * @APPLE_LICENSE_HEADER_START@ 3 * 4 * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved. 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. Please obtain a copy of the License at 10 * http://www.opensource.apple.com/apsl/ and read it before using this 11 * file. 12 * 13 * The Original Code and all software distributed under the License are 14 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 15 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 16 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 18 * Please see the License for the specific language governing rights and 19 * limitations under the License. 20 * 21 * @APPLE_LICENSE_HEADER_END@ 22 */ 23/* Copyright (c) 1992 NeXT Computer, Inc. All rights reserved. 24 * 25 * EventIO.m - Event System MiG interface for driver control and status. 26 * 27 * HISTORY 28 * 2-April-92 Mike Paquette at NeXT 29 * Created. 30 */ 31 32#include <IOKit/system.h> 33 34#include <IOKit/hidsystem/IOHIDTypes.h> 35#include <IOKit/hidsystem/IOHIDSystem.h> 36#include <IOKit/hidsystem/IOHIDShared.h> 37 38#include <IOKit/hidsystem/ev_private.h> /* Per-machine configuration info */ 39 40/* 41 * Additional kernel API to drivers using the Event Driver 42 */ 43int EventCoalesceDisplayCmd( int cmd, int oldcmd ); 44int EventCoalesceDisplayCmd( int cmd, int oldcmd ) 45{ 46 static const char coalesce[4][4] = { 47 /* nop */ {EVNOP, EVHIDE, EVSHOW, EVMOVE}, 48 /* hide */ {EVHIDE, EVHIDE, EVNOP, EVSHOW}, 49 /* show */ {EVSHOW, EVNOP, EVSHOW, EVSHOW}, 50 /* move */ {EVMOVE, EVHIDE, EVSHOW, EVMOVE} 51 }; 52 if ( cmd < EVLEVEL ) // coalesce EVNOP thru EVMOVE only 53 cmd = coalesce[oldcmd & 3][cmd & 3]; 54 return cmd; 55} 56 57