xref: /netbsd/sys/arch/atari/dev/grfabs_tt.h (revision bf9ec67e)
1 /*	$NetBSD: grfabs_tt.h,v 1.1 1996/09/16 06:50:34 leo Exp $	*/
2 
3 /*
4  * Copyright (c) 1996 Leo Weppelman.
5  * All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions and the following disclaimer.
12  * 2. Redistributions in binary form must reproduce the above copyright
13  *    notice, this list of conditions and the following disclaimer in the
14  *    documentation and/or other materials provided with the distribution.
15  * 3. All advertising materials mentioning features or use of this software
16  *    must display the following acknowledgement:
17  *      This product includes software developed by Leo Weppelman
18  * 4. The name of the author may not be used to endorse or promote products
19  *    derived from this software without specific prior written permission
20  *
21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
22  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
23  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
24  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
25  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
26  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
30  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31  */
32 
33 #ifndef _GRFABS_TT_H
34 #define _GRFABS_TT_H
35 
36 /*
37  * Colormap related macro's
38  */
39 #define CM_L2TT(v) \
40     (((0x000f0000 & (v)) >> 8) | ((0x00000f00 & (v)) >> 4) |\
41       (0x0000000f & (v)))
42 #define CM_TT2L(v) \
43     ((((0x00000f00 & (v)) * 0xff / 0xf) << 8) |\
44      (((0x000000f0 & (v)) * 0xff / 0xf) << 4) |\
45        (0x0000000f & (v)) * 0xff / 0xf)
46 
47 void tt_probe_video __P((MODES *));
48 #endif /*  _GRFABS_TT_H */
49