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rasops8.c revision 1.45 
      1 /* 	$NetBSD: rasops8.c,v 1.45 2019/07/31 00:14:25 rin 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: rasops8.c,v 1.45 2019/07/31 00:14:25 rin 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 
     44 #define	_RASOPS_PRIVATE
     45 #include <dev/rasops/rasops.h>
     46 
     47 static void 	rasops8_putchar(void *, int, int, u_int, long);
     48 static void 	rasops8_putchar_aa(void *, int, int, u_int, long);
     49 #ifndef RASOPS_SMALL
     50 static void 	rasops8_putchar8(void *, int, int, u_int, long);
     51 static void 	rasops8_putchar12(void *, int, int, u_int, long);
     52 static void 	rasops8_putchar16(void *, int, int, u_int, long);
     53 static void	rasops8_makestamp(struct rasops_info *ri, long);
     54 
     55 /*
     56  * 4x1 stamp for optimized character blitting
     57  */
     58 static uint32_t	stamp[16];
     59 static long	stamp_attr;
     60 static int	stamp_mutex;	/* XXX see note in README */
     61 #endif
     62 
     63 /*
     64  * offset = STAMP_SHIFT(fontbits, nibble #) & STAMP_MASK
     65  * destination = STAMP_READ(offset)
     66  */
     67 #define	STAMP_SHIFT(fb, n)	((n) ? (fb) >> 2 : (fb) << 2)
     68 #define	STAMP_MASK		(0xf << 2)
     69 #define	STAMP_READ(o)		(*(uint32_t *)((uint8_t *)stamp + (o)))
     70 
     71 /*
     72  * Initialize a 'rasops_info' descriptor for this depth.
     73  */
     74 void
     75 rasops8_init(struct rasops_info *ri)
     76 {
     77 
     78 	if (ri->ri_flg & RI_8BIT_IS_RGB) {
     79 		ri->ri_rnum = ri->ri_gnum = 3;
     80 		ri->ri_bnum = 2;
     81 
     82 		ri->ri_rpos = 5;
     83 		ri->ri_gpos = 2;
     84 		ri->ri_bpos = 0;
     85 	}
     86 
     87 	if (FONT_IS_ALPHA(ri->ri_font)) {
     88 		ri->ri_ops.putchar = rasops8_putchar_aa;
     89 		return;
     90 	}
     91 
     92 	switch (ri->ri_font->fontwidth) {
     93 #ifndef RASOPS_SMALL
     94 	case 8:
     95 		ri->ri_ops.putchar = rasops8_putchar8;
     96 		break;
     97 	case 12:
     98 		ri->ri_ops.putchar = rasops8_putchar12;
     99 		break;
    100 	case 16:
    101 		ri->ri_ops.putchar = rasops8_putchar16;
    102 		break;
    103 #endif /* !RASOPS_SMALL */
    104 	default:
    105 		ri->ri_ops.putchar = rasops8_putchar;
    106 		break;
    107 	}
    108 }
    109 
    110 #define	RASOPS_DEPTH	8
    111 #include "rasops_putchar.h"
    112 #include "rasops_putchar_aa.h"
    113 
    114 #ifndef RASOPS_SMALL
    115 /*
    116  * Recompute the 4x1 blitting stamp.
    117  */
    118 static void
    119 rasops8_makestamp(struct rasops_info *ri, long attr)
    120 {
    121 	uint32_t fg, bg;
    122 	int i;
    123 
    124 	fg = ri->ri_devcmap[((uint32_t)attr >> 24) & 0xf] & 0xff;
    125 	bg = ri->ri_devcmap[((uint32_t)attr >> 16) & 0xf] & 0xff;
    126 	stamp_attr = attr;
    127 
    128 	for (i = 0; i < 16; i++) {
    129 #if BYTE_ORDER == BIG_ENDIAN
    130 #define NEED_LITTLE_ENDIAN_STAMP RI_BSWAP
    131 #else
    132 #define NEED_LITTLE_ENDIAN_STAMP 0
    133 #endif
    134 		if ((ri->ri_flg & RI_BSWAP) == NEED_LITTLE_ENDIAN_STAMP) {
    135 			/* little endian */
    136 			stamp[i]  = (i & 8 ? fg : bg);
    137 			stamp[i] |= (i & 4 ? fg : bg) << 8;
    138 			stamp[i] |= (i & 2 ? fg : bg) << 16;
    139 			stamp[i] |= (i & 1 ? fg : bg) << 24;
    140 		} else {
    141 			/* big endian */
    142 			stamp[i]  = (i & 1 ? fg : bg);
    143 			stamp[i] |= (i & 2 ? fg : bg) << 8;
    144 			stamp[i] |= (i & 4 ? fg : bg) << 16;
    145 			stamp[i] |= (i & 8 ? fg : bg) << 24;
    146 		}
    147 	}
    148 }
    149 
    150 #define	RASOPS_WIDTH	8
    151 #include "rasops_putchar_width.h"
    152 #undef	RASOPS_WIDTH
    153 
    154 #define	RASOPS_WIDTH	12
    155 #include "rasops_putchar_width.h"
    156 #undef	RASOPS_WIDTH
    157 
    158 #define	RASOPS_WIDTH	16
    159 #include "rasops_putchar_width.h"
    160 #undef	RASOPS_WIDTH
    161 
    162 #endif
    163