rasops32.c revision 1.13 
1/*	 $NetBSD: rasops32.c,v 1.13 2005/02/04 02:10:47 perry Exp $	*/
2
3/*-
4 * Copyright (c) 1999 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Andrew Doran.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 *    must display the following acknowledgement:
20 *	This product includes software developed by the NetBSD
21 *	Foundation, Inc. and its contributors.
22 * 4. Neither the name of The NetBSD Foundation nor the names of its
23 *    contributors may be used to endorse or promote products derived
24 *    from this software without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
29 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36 * POSSIBILITY OF SUCH DAMAGE.
37 */
38
39#include <sys/cdefs.h>
40__KERNEL_RCSID(0, "$NetBSD: rasops32.c,v 1.13 2005/02/04 02:10:47 perry Exp $");
41
42#include "opt_rasops.h"
43
44#include <sys/param.h>
45#include <sys/systm.h>
46#include <sys/time.h>
47
48#include <dev/wscons/wsdisplayvar.h>
49#include <dev/wscons/wsconsio.h>
50#include <dev/rasops/rasops.h>
51
52static void 	rasops32_putchar(void *, int, int, u_int, long attr);
53
54/*
55 * Initialize a 'rasops_info' descriptor for this depth.
56 */
57void
58rasops32_init(ri)
59	struct rasops_info *ri;
60{
61
62	if (ri->ri_rnum == 0) {
63		ri->ri_rnum = 8;
64		ri->ri_rpos = 0;
65		ri->ri_gnum = 8;
66		ri->ri_gpos = 8;
67		ri->ri_bnum = 8;
68		ri->ri_bpos = 16;
69	}
70
71	ri->ri_ops.putchar = rasops32_putchar;
72}
73
74/*
75 * Paint a single character.
76 */
77static void
78rasops32_putchar(cookie, row, col, uc, attr)
79	void *cookie;
80	int row, col;
81	u_int uc;
82	long attr;
83{
84	int width, height, cnt, fs, fb, clr[2];
85	struct rasops_info *ri;
86	int32_t *dp, *rp;
87	u_char *fr;
88
89	ri = (struct rasops_info *)cookie;
90
91#ifdef RASOPS_CLIPPING
92	/* Catches 'row < 0' case too */
93	if ((unsigned)row >= (unsigned)ri->ri_rows)
94		return;
95
96	if ((unsigned)col >= (unsigned)ri->ri_cols)
97		return;
98#endif
99
100	/* check if character fits into font limits */
101	if (uc < ri->ri_font->firstchar ||
102	    (uc - ri->ri_font->firstchar) >= ri->ri_font->numchars)
103	    return;
104
105	rp = (int32_t *)(ri->ri_bits + row*ri->ri_yscale + col*ri->ri_xscale);
106
107	height = ri->ri_font->fontheight;
108	width = ri->ri_font->fontwidth;
109
110	clr[0] = ri->ri_devcmap[(attr >> 16) & 0xf];
111	clr[1] = ri->ri_devcmap[(attr >> 24) & 0xf];
112
113	if (uc == ' ') {
114		while (height--) {
115			dp = rp;
116			DELTA(rp, ri->ri_stride, int32_t *);
117
118			for (cnt = width; cnt; cnt--)
119				*dp++ = clr[0];
120		}
121	} else {
122		uc -= ri->ri_font->firstchar;
123		fr = (u_char *)ri->ri_font->data + uc * ri->ri_fontscale;
124		fs = ri->ri_font->stride;
125
126		while (height--) {
127			dp = rp;
128			fb = fr[3] | (fr[2] << 8) | (fr[1] << 16) |
129			    (fr[0] << 24);
130			fr += fs;
131			DELTA(rp, ri->ri_stride, int32_t *);
132
133			for (cnt = width; cnt; cnt--) {
134				*dp++ = clr[(fb >> 31) & 1];
135				fb <<= 1;
136			}
137		}
138	}
139
140	/* Do underline */
141	if ((attr & 1) != 0) {
142		DELTA(rp, -(ri->ri_stride << 1), int32_t *);
143
144		while (width--)
145			*rp++ = clr[1];
146	}
147}
148