rasops32.c revision 1.22 
1/*	 $NetBSD: rasops32.c,v 1.22 2011/12/27 06:24:40 macallan 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 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#include <sys/cdefs.h>
33__KERNEL_RCSID(0, "$NetBSD: rasops32.c,v 1.22 2011/12/27 06:24:40 macallan Exp $");
34
35#include "opt_rasops.h"
36
37#include <sys/param.h>
38#include <sys/systm.h>
39#include <sys/time.h>
40
41#include <dev/wscons/wsdisplayvar.h>
42#include <dev/wscons/wsconsio.h>
43#include <dev/rasops/rasops.h>
44
45static void 	rasops32_putchar(void *, int, int, u_int, long attr);
46
47/*
48 * Initialize a 'rasops_info' descriptor for this depth.
49 */
50void
51rasops32_init(struct rasops_info *ri)
52{
53
54	if (ri->ri_rnum == 0) {
55		ri->ri_rnum = 8;
56		ri->ri_rpos = 0;
57		ri->ri_gnum = 8;
58		ri->ri_gpos = 8;
59		ri->ri_bnum = 8;
60		ri->ri_bpos = 16;
61	}
62
63	ri->ri_ops.putchar = rasops32_putchar;
64}
65
66/*
67 * Paint a single character.
68 */
69static void
70rasops32_putchar(void *cookie, int row, int col, u_int uc, long attr)
71{
72	int width, height, cnt, fs, fb, clr[2];
73	struct rasops_info *ri = (struct rasops_info *)cookie;
74	struct wsdisplay_font *font = PICK_FONT(ri, uc);
75	int32_t *dp, *rp, *hp, *hrp;
76	u_char *fr;
77
78	hp = hrp = NULL;
79
80#ifdef RASOPS_CLIPPING
81	/* Catches 'row < 0' case too */
82	if ((unsigned)row >= (unsigned)ri->ri_rows)
83		return;
84
85	if ((unsigned)col >= (unsigned)ri->ri_cols)
86		return;
87#endif
88
89	/* check if character fits into font limits */
90	if (uc < font->firstchar ||
91	    (uc - font->firstchar) >= font->numchars)
92	    return;
93
94	rp = (int32_t *)(ri->ri_bits + row*ri->ri_yscale + col*ri->ri_xscale);
95	if (ri->ri_hwbits)
96		hrp = (int32_t *)(ri->ri_hwbits + row*ri->ri_yscale +
97		    col*ri->ri_xscale);
98
99	height = font->fontheight;
100	width = font->fontwidth;
101
102	clr[0] = ri->ri_devcmap[(attr >> 16) & 0xf];
103	clr[1] = ri->ri_devcmap[(attr >> 24) & 0xf];
104
105	if (uc == ' ') {
106		while (height--) {
107			dp = rp;
108			DELTA(rp, ri->ri_stride, int32_t *);
109			if (ri->ri_hwbits) {
110				hp = hrp;
111				DELTA(hrp, ri->ri_stride, int32_t *);
112			}
113
114			for (cnt = width; cnt; cnt--) {
115				*dp++ = clr[0];
116				if (ri->ri_hwbits)
117					*hp++ = clr[0];
118			}
119		}
120	} else {
121		uc -= font->firstchar;
122		fr = (u_char *)font->data + uc * ri->ri_fontscale;
123		fs = font->stride;
124
125		if (font->stride < width) {
126			/* this is a mono font */
127			while (height--) {
128				dp = rp;
129				fb = fr[3] | (fr[2] << 8) | (fr[1] << 16) |
130				    (fr[0] << 24);
131				fr += fs;
132				DELTA(rp, ri->ri_stride, int32_t *);
133				if (ri->ri_hwbits) {
134					hp = hrp;
135					DELTA(hrp, ri->ri_stride, int32_t *);
136				}
137
138				for (cnt = width; cnt; cnt--) {
139					*dp++ = clr[(fb >> 31) & 1];
140					if (ri->ri_hwbits)
141						*hp++ = clr[(fb >> 31) & 1];
142					fb <<= 1;
143				}
144			}
145		} else {
146			/* this is an alpha map */
147			int x, y, r, g, b, aval;
148			int r1, g1, b1, r0, g0, b0;
149
150			r0 = (clr[0] >> 16) & 0xff;
151			r1 = (clr[1] >> 16) & 0xff;
152			g0 = (clr[0] >> 8) & 0xff;
153			g1 = (clr[1] >> 8) & 0xff;
154			b0 =  clr[0] & 0xff;
155			b1 =  clr[1] & 0xff;
156
157			for (y = 0; y < height; y++) {
158				dp = rp + ri->ri_width * y;
159				for (x = 0; x < width; x++) {
160					aval = *fr;
161					if (aval == 0) {
162						*dp = clr[0];
163					} else if (aval == 255) {
164						*dp = clr[1];
165					} else {
166						r = aval * r1 +
167						    (255 - aval) * r0;
168						g = aval * g1 +
169						    (255 - aval) * g0;
170						b = aval * b1 +
171						    (255 - aval) * b0;
172						*dp = (r & 0xff00) << 8 |
173						      (g & 0xff00) |
174						      (b & 0xff00) >> 8;
175					}
176					dp++;
177					fr++;
178				}
179			}
180		}
181	}
182
183	/* Do underline */
184	if ((attr & 1) != 0) {
185		DELTA(rp, -(ri->ri_stride << 1), int32_t *);
186		if (ri->ri_hwbits)
187			DELTA(hrp, -(ri->ri_stride << 1), int32_t *);
188
189		while (width--) {
190			*rp++ = clr[1];
191			if (ri->ri_hwbits)
192				*hrp++ = clr[1];
193		}
194	}
195}
196