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Annotation of XNU/iokit/Families/IOHIDSystem/IOHIDIO.cpp, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved.
                      3:  *
                      4:  * @APPLE_LICENSE_HEADER_START@
                      5:  * 
                      6:  * The contents of this file constitute Original Code as defined in and
                      7:  * are subject to the Apple Public Source License Version 1.1 (the
                      8:  * "License").  You may not use this file except in compliance with the
                      9:  * License.  Please obtain a copy of the License at
                     10:  * http://www.apple.com/publicsource and read it before using this file.
                     11:  * 
                     12:  * This Original Code and all software distributed under the License are
                     13:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
                     14:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
                     15:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
                     16:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
                     17:  * License for the specific language governing rights and limitations
                     18:  * under the License.
                     19:  * 
                     20:  * @APPLE_LICENSE_HEADER_END@
                     21:  */
                     22: /*     Copyright (c) 1992 NeXT Computer, Inc.  All rights reserved. 
                     23:  *
                     24:  * EventIO.m - Event System MiG interface for driver control and status.
                     25:  *
                     26:  * HISTORY
                     27:  * 2-April-92    Mike Paquette at NeXT 
                     28:  *      Created. 
                     29:  */
                     30: 
                     31: #include <IOKit/system.h>
                     32: 
                     33: #include <IOKit/hidsystem/IOHIDTypes.h>
                     34: #include <IOKit/hidsystem/IOHIDSystem.h>
                     35: #include <IOKit/hidsystem/IOHIDShared.h>
                     36: 
                     37: #include <IOKit/hidsystem/ev_private.h>        /* Per-machine configuration info */
                     38: 
                     39: /*
                     40:  * Additional kernel API to drivers using the Event Driver
                     41:  */
                     42:  int
                     43: EventCoalesceDisplayCmd( int cmd, int oldcmd )
                     44: {
                     45:        static const char coalesce[4][4] = {
                     46:            /* nop */  {EVNOP,  EVHIDE, EVSHOW, EVMOVE},
                     47:            /* hide */ {EVHIDE, EVHIDE, EVNOP,  EVSHOW},
                     48:            /* show */ {EVSHOW, EVNOP,  EVSHOW, EVSHOW},
                     49:            /* move */ {EVMOVE, EVHIDE, EVSHOW, EVMOVE}
                     50:        };
                     51:        if ( cmd < EVLEVEL )    // coalesce EVNOP thru EVMOVE only
                     52:            cmd = coalesce[oldcmd & 3][cmd & 3];
                     53:        return cmd;
                     54: }
                     55: 

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