/*	$NetBSD: tx3912videovar.h,v 1.5 2000/05/08 21:57:58 uch Exp $ */

/*-
 * Copyright (c) 1999, 2000 UCHIYAMA Yasushi.  All rights reserved.
 *
 * 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. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
 */

int	tx3912video_init __P((paddr_t, paddr_t *));

/*
 * 8bpp CLUT
 */
#define TX3912VIDEO_RGB24TOINDEX(rgb)					\
	((((((rgb) >> 16) & 0xff) >> 5) << 5) |				\
	 (((((rgb) >> 8) & 0xff) >> 5) << 2) |				\
	 ((((rgb) & 0xff) >> 6)))

/* system color */
#define TX3912VIDEO_BLACK		TX3912VIDEO_RGB24TOINDEX(0x000000)
#define TX3912VIDEO_RED			TX3912VIDEO_RGB24TOINDEX(0xff0000)
#define TX3912VIDEO_GREEN		TX3912VIDEO_RGB24TOINDEX(0x00ff00)
#define TX3912VIDEO_YELLOW		TX3912VIDEO_RGB24TOINDEX(0xffff00)
#define TX3912VIDEO_BLUE		TX3912VIDEO_RGB24TOINDEX(0x0000ff)
#define TX3912VIDEO_MAGENTA		TX3912VIDEO_RGB24TOINDEX(0xff00ff)
#define TX3912VIDEO_CYAN		TX3912VIDEO_RGB24TOINDEX(0x00ffff)
#define TX3912VIDEO_WHITE		TX3912VIDEO_RGB24TOINDEX(0xffffff)
#define TX3912VIDEO_DARK_BLACK		TX3912VIDEO_RGB24TOINDEX(0x000000)
#define TX3912VIDEO_DARK_RED		TX3912VIDEO_RGB24TOINDEX(0x800000)
#define TX3912VIDEO_DARK_GREEN		TX3912VIDEO_RGB24TOINDEX(0x008000)
#define TX3912VIDEO_DARK_YELLOW		TX3912VIDEO_RGB24TOINDEX(0x808000)
#define TX3912VIDEO_DARK_BLUE		TX3912VIDEO_RGB24TOINDEX(0x000080)
#define TX3912VIDEO_DARK_MAGENTA	TX3912VIDEO_RGB24TOINDEX(0x800080)
#define TX3912VIDEO_DARK_CYAN		TX3912VIDEO_RGB24TOINDEX(0x008080)
#define TX3912VIDEO_DARK_WHITE		TX3912VIDEO_RGB24TOINDEX(0x808080)

/* 
 * Y =  0.2990 * R + 0.5870 * G + 0.1140 * B
 * U = -0.1690 * R - 0.3316 * G + 0.5000 * B
 * V =  0.5000 * R - 0.4186 * G - 0.0813 * B
 */

/*
 * debug functions.
 */
void	tx3912video_calibration_pattern __P((void));
void	tx3912video_line __P((int, int, int, int));
void	tx3912video_dot __P((int, int));