74 lines
3.2 KiB
C
74 lines
3.2 KiB
C
/* $NetBSD: btvar.h,v 1.2 1994/11/20 20:51:56 deraadt Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* This software was developed by the Computer Systems Engineering group
|
|
* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
|
|
* contributed to Berkeley.
|
|
*
|
|
* All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Lawrence Berkeley Laboratory.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* @(#)btvar.h 8.2 (Berkeley) 1/21/94
|
|
*/
|
|
|
|
/*
|
|
* Brooktree color frame buffer state variables (see btreg.h).
|
|
*
|
|
* Unfortunately, remarkably little code can be shared between the
|
|
* cg3 and cg6 drivers here, as the cg3 registers do longword-ops
|
|
* `as expected', but the cg6 ones use only the upper byte.
|
|
*
|
|
* Still, the software color map manipulation is not completely trivial.
|
|
*/
|
|
union bt_cmap {
|
|
u_char cm_map[256][3]; /* 256 R/G/B entries */
|
|
u_int cm_chip[256 * 3 / 4]; /* the way the chip gets loaded */
|
|
};
|
|
|
|
/*
|
|
* Routines in bt_subr.c.
|
|
*/
|
|
int bt_getcmap __P((struct fbcmap *, union bt_cmap *, int));
|
|
int bt_putcmap __P((struct fbcmap *, union bt_cmap *, int));
|
|
|
|
/*
|
|
* Compute (x / 4) * 3 and (x / 4) * 4. These are used in turning
|
|
* RGB indices (which are in multiples of three) into `chip RGB' values
|
|
* (which are in multiples of four).
|
|
*/
|
|
#define BT_D4M3(x) ((((x) >> 2) << 1) + ((x) >> 2)) /* (x / 4) * 3 */
|
|
#define BT_D4M4(x) ((x) & ~3) /* (x / 4) * 4 */
|