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rasops8.c revision 1.44 
      1 /* 	$NetBSD: rasops8.c,v 1.44 2019/07/29 10:55:56 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 1.44 2019/07/29 10:55:56 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 #include <dev/rasops/rasops.h>
     44 
     45 static void 	rasops8_putchar(void *, int, int, u_int, long);
     46 static void 	rasops8_putchar_aa(void *, int, int, u_int, long);
     47 #ifndef RASOPS_SMALL
     48 static void 	rasops8_putchar8(void *, int, int, u_int, long);
     49 static void 	rasops8_putchar12(void *, int, int, u_int, long);
     50 static void 	rasops8_putchar16(void *, int, int, u_int, long);
     51 static void	rasops8_makestamp(struct rasops_info *ri, long);
     52 
     53 /*
     54  * 4x1 stamp for optimized character blitting
     55  */
     56 static uint32_t	stamp[16];
     57 static long	stamp_attr;
     58 static int	stamp_mutex;	/* XXX see note in README */
     59 #endif
     60 
     61 /*
     62  * offset = STAMP_SHIFT(fontbits, nibble #) & STAMP_MASK
     63  * destination = STAMP_READ(offset)
     64  */
     65 #define	STAMP_SHIFT(fb, n)	((n) ? (fb) >> 2 : (fb) << 2)
     66 #define	STAMP_MASK		(0xf << 2)
     67 #define	STAMP_READ(o)		(*(uint32_t *)((uint8_t *)stamp + (o)))
     68 
     69 /*
     70  * Initialize a 'rasops_info' descriptor for this depth.
     71  */
     72 void
     73 rasops8_init(struct rasops_info *ri)
     74 {
     75 
     76 	if (ri->ri_flg & RI_8BIT_IS_RGB) {
     77 		ri->ri_rnum = ri->ri_gnum = 3;
     78 		ri->ri_bnum = 2;
     79 
     80 		ri->ri_rpos = 5;
     81 		ri->ri_gpos = 2;
     82 		ri->ri_bpos = 0;
     83 	}
     84 
     85 	if (FONT_IS_ALPHA(ri->ri_font)) {
     86 		ri->ri_ops.putchar = rasops8_putchar_aa;
     87 		return;
     88 	}
     89 
     90 	switch (ri->ri_font->fontwidth) {
     91 #ifndef RASOPS_SMALL
     92 	case 8:
     93 		ri->ri_ops.putchar = rasops8_putchar8;
     94 		break;
     95 	case 12:
     96 		ri->ri_ops.putchar = rasops8_putchar12;
     97 		break;
     98 	case 16:
     99 		ri->ri_ops.putchar = rasops8_putchar16;
    100 		break;
    101 #endif /* !RASOPS_SMALL */
    102 	default:
    103 		ri->ri_ops.putchar = rasops8_putchar;
    104 		break;
    105 	}
    106 }
    107 
    108 #define	RASOPS_DEPTH	8
    109 #include "rasops_putchar.h"
    110 #include "rasops_putchar_aa.h"
    111 
    112 #ifndef RASOPS_SMALL
    113 /*
    114  * Recompute the 4x1 blitting stamp.
    115  */
    116 static void
    117 rasops8_makestamp(struct rasops_info *ri, long attr)
    118 {
    119 	uint32_t fg, bg;
    120 	int i;
    121 
    122 	fg = ri->ri_devcmap[((uint32_t)attr >> 24) & 0xf] & 0xff;
    123 	bg = ri->ri_devcmap[((uint32_t)attr >> 16) & 0xf] & 0xff;
    124 	stamp_attr = attr;
    125 
    126 	for (i = 0; i < 16; i++) {
    127 #if BYTE_ORDER == BIG_ENDIAN
    128 #define NEED_LITTLE_ENDIAN_STAMP RI_BSWAP
    129 #else
    130 #define NEED_LITTLE_ENDIAN_STAMP 0
    131 #endif
    132 		if ((ri->ri_flg & RI_BSWAP) == NEED_LITTLE_ENDIAN_STAMP) {
    133 			/* little endian */
    134 			stamp[i]  = (i & 8 ? fg : bg);
    135 			stamp[i] |= (i & 4 ? fg : bg) << 8;
    136 			stamp[i] |= (i & 2 ? fg : bg) << 16;
    137 			stamp[i] |= (i & 1 ? fg : bg) << 24;
    138 		} else {
    139 			/* big endian */
    140 			stamp[i]  = (i & 1 ? fg : bg);
    141 			stamp[i] |= (i & 2 ? fg : bg) << 8;
    142 			stamp[i] |= (i & 4 ? fg : bg) << 16;
    143 			stamp[i] |= (i & 8 ? fg : bg) << 24;
    144 		}
    145 	}
    146 }
    147 
    148 #define	RASOPS_WIDTH	8
    149 #include "rasops_putchar_width.h"
    150 #undef	RASOPS_WIDTH
    151 
    152 #define	RASOPS_WIDTH	12
    153 #include "rasops_putchar_width.h"
    154 #undef	RASOPS_WIDTH
    155 
    156 #define	RASOPS_WIDTH	16
    157 #include "rasops_putchar_width.h"
    158 #undef	RASOPS_WIDTH
    159 
    160 #endif
    161