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

/*	 $NetBSD: rasops32.c,v 1.20 2011/12/22 04:52:45 macallan Exp $	*/

/*-
 * Copyright (c) 1999 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Andrew Doran.
 *
 * 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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 <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: rasops32.c,v 1.20 2011/12/22 04:52:45 macallan Exp $");

#include "opt_rasops.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(void *, int, int, u_int, long attr);

/*
 * Initialize a 'rasops_info' descriptor for this depth.
 */
void
rasops32_init(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(void *cookie, int row, int col, u_int uc, long attr)
{
	int width, height, cnt, fs, fb, clr[2];
	struct rasops_info *ri = (struct rasops_info *)cookie;
	struct wsdisplay_font *font = PICK_FONT(ri, uc);
	int32_t *dp, *rp, *hp, *hrp;
	u_char *fr;

	hp = hrp = NULL;

#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

	/* check if character fits into font limits */
	if (uc < font->firstchar ||
	    (uc - font->firstchar) >= font->numchars)
	    return;

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

	height = font->fontheight;
	width = font->fontwidth;

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

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

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

		if (font->stride < width) {
			/* this is a mono font */
			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 *);
				if (ri->ri_hwbits) {
					hp = hrp;
					DELTA(hrp, ri->ri_stride, int32_t *);
				}

				for (cnt = width; cnt; cnt--) {
					*dp++ = clr[(fb >> 31) & 1];
					if (ri->ri_hwbits)
						*hp++ = clr[(fb >> 31) & 1];
					fb <<= 1;
				}
			}
		} else {
			/* this is an alpha map */
			int x, y, r, g, b, alpha;
			int r1, g1, b1, r0, g0, b0;

			r0 = (clr[0] >> 16) & 0xff;
			r1 = (clr[1] >> 16) & 0xff;
			g0 = (clr[0] >> 8) & 0xff;
			g1 = (clr[1] >> 8) & 0xff;
			b0 =  clr[0] & 0xff;
			b1 =  clr[1] & 0xff;

			for (y = 0; y < height; y++) {
				dp = rp + ri->ri_width * y;
				for (x = 0; x < width; x++) {
					alpha = *fr;
					r = alpha * r1 + (255 - alpha) * r0;
					g = alpha * g1 + (255 - alpha) * g0;
					b = alpha * b1 + (255 - alpha) * b0;
					*dp = (r & 0xff00) << 8 |
					      (g & 0xff00) |
					      (b & 0xff00) >> 8;
					dp++;
					fr++;
				}
			}
		}
	}

	/* Do underline */
	if ((attr & 1) != 0) {
		DELTA(rp, -(ri->ri_stride << 1), int32_t *);
		if (ri->ri_hwbits)
			DELTA(hrp, -(ri->ri_stride << 1), int32_t *);

		while (width--) {
			*rp++ = clr[1];
			if (ri->ri_hwbits)
				*hrp++ = clr[1];
		}
	}
}