xref: /src/sys/dev/rasops/rasops32.c

/*	 $NetBSD: rasops32.c,v 1.3 1999/04/26 04:27:47 ad Exp $ */

/*
 * Copyright (c) 1999 Andy Doran <ad (at) NetBSD.org>
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
 *
 */

#include "opt_rasops.h"
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: rasops32.c,v 1.3 1999/04/26 04:27:47 ad Exp $");

#include <sys/types.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/time.h>

#include <dev/wscons/wsdisplayvar.h>
#include <dev/wscons/wsconsio.h>
#include <dev/rasops/rasops.h>

static void 	rasops32_putchar __P((void *, int, int, u_int, long attr));
void		rasops32_init __P((struct rasops_info *ri));


/*
 * Initalize a 'rasops_info' descriptor for this depth.
 */
void
rasops32_init(ri)
	struct rasops_info *ri;
{

	if (ri->ri_rnum == 0) {
		ri->ri_rnum = 8;
		ri->ri_rpos = 0;
		ri->ri_gnum = 8;
		ri->ri_gpos = 8;
		ri->ri_bnum = 8;
		ri->ri_bpos = 16;
	}

	ri->ri_ops.putchar = rasops32_putchar;
}


/*
 * Paint a single character.
 */
static void
rasops32_putchar(cookie, row, col, uc, attr)
	void *cookie;
	int row, col;
	u_int uc;
	long attr;
{
	struct rasops_info *ri;
	int32_t *dp, *rp, clr[2];
	u_char *fr;
	int width, height, cnt, fs, fb;

	ri = (struct rasops_info *)cookie;

#ifdef RASOPS_CLIPPING
	/* Catches 'row < 0' case too */
	if ((unsigned)row >= (unsigned)ri->ri_rows)
		return;

	if ((unsigned)col >= (unsigned)ri->ri_cols)
		return;
#endif

	rp = (int32_t *)(ri->ri_bits + row*ri->ri_yscale + col*ri->ri_xscale);

	height = ri->ri_font->fontheight;
	width = ri->ri_font->fontwidth;

	clr[0] = ri->ri_devcmap[(attr >> 16) & 15];
	clr[1] = ri->ri_devcmap[(attr >> 24) & 15];

	if (uc == ' ') {
		while (height--) {
			dp = rp;
			DELTA(rp, ri->ri_stride, int32_t *);

			for (cnt = width; cnt; cnt--)
				*dp++ = clr[0];
		}
	} else {
		uc -= ri->ri_font->firstchar;
		fr = (u_char *)ri->ri_font->data + uc * ri->ri_fontscale;
		fs = ri->ri_font->stride;

		while (height--) {
			dp = rp;
			fb = fr[3] | (fr[2] << 8) | (fr[1] << 16) | (fr[0] << 24);
			fr += fs;
			DELTA(rp, ri->ri_stride, int32_t *);

			for (cnt = width; cnt; cnt--) {
				*dp++ = clr[(fb >> 31) & 1];
				fb <<= 1;
			}
		}
	}

	/* Do underline */
	if (attr & 1) {
		DELTA(rp, -(ri->ri_stride << 1), int32_t *);

		while (width--)
			*rp++ = clr[1];
	}
}