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      1 /*	 $NetBSD: rasops32.c,v 1.46 2019/08/14 00:51:10 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: rasops32.c,v 1.46 2019/08/14 00:51:10 rin Exp $");
     34 
     35 #ifdef _KERNEL_OPT
     36 #include "opt_rasops.h"
     37 #endif
     38 
     39 #include <sys/param.h>
     40 
     41 #include <dev/wscons/wsdisplayvar.h>
     42 #include <dev/wscons/wsconsio.h>
     43 
     44 #define	_RASOPS_PRIVATE
     45 #define	RASOPS_DEPTH	32
     46 #include <dev/rasops/rasops.h>
     47 
     48 static void 	rasops32_putchar(void *, int, int, u_int, long);
     49 static void 	rasops32_putchar_aa(void *, int, int, u_int, long);
     50 #ifndef RASOPS_SMALL
     51 static void	rasops32_putchar8(void *, int, int, u_int, long);
     52 static void	rasops32_putchar12(void *, int, int, u_int, long);
     53 static void	rasops32_putchar16(void *, int, int, u_int, long);
     54 static void	rasops32_makestamp(struct rasops_info *, long);
     55 #endif
     56 
     57 #ifndef RASOPS_SMALL
     58 /* stamp for optimized character blitting */
     59 static uint32_t			stamp[64];
     60 static long			stamp_attr;
     61 static struct rasops_info	*stamp_ri;
     62 
     63 /*
     64  * offset = STAMP_SHIFT(fontbits, nibble #) & STAMP_MASK
     65  * destination uint32_t[0] = STAMP_READ(offset)
     66  * destination uint32_t[1] = STAMP_READ(offset +  4)
     67  * destination uint32_t[2] = STAMP_READ(offset +  8)
     68  * destination uint32_t[3] = STAMP_READ(offset + 12)
     69  */
     70 #define	STAMP_SHIFT(fb, n)	((n) ? (fb) : (fb) << 4)
     71 #define	STAMP_MASK		(0xf << 4)
     72 #define	STAMP_READ(o)		(*(uint32_t *)((uint8_t *)stamp + (o)))
     73 #endif
     74 
     75 /*
     76  * Initialize a 'rasops_info' descriptor for this depth.
     77  */
     78 void
     79 rasops32_init(struct rasops_info *ri)
     80 {
     81 
     82 	if (ri->ri_rnum == 0) {
     83 		ri->ri_rnum = ri->ri_gnum = ri->ri_bnum = 8;
     84 
     85 		ri->ri_rpos = 0;
     86 		ri->ri_gpos = 8;
     87 		ri->ri_bpos = 16;
     88 	}
     89 
     90 	if (FONT_IS_ALPHA(ri->ri_font)) {
     91 		ri->ri_ops.putchar = rasops32_putchar_aa;
     92 		return;
     93 	}
     94 
     95 	switch (ri->ri_font->fontwidth) {
     96 #ifndef RASOPS_SMALL
     97 	case 8:
     98 		ri->ri_ops.putchar = rasops32_putchar8;
     99 		break;
    100 	case 12:
    101 		ri->ri_ops.putchar = rasops32_putchar12;
    102 		break;
    103 	case 16:
    104 		ri->ri_ops.putchar = rasops32_putchar16;
    105 		break;
    106 #endif
    107 	default:
    108 		ri->ri_ops.putchar = rasops32_putchar;
    109 		return;
    110 	}
    111 
    112 #ifndef RASOPS_SMALL
    113 	stamp_attr = -1;
    114 	stamp_ri = NULL;
    115 #endif
    116 }
    117 
    118 /* rasops32_putchar */
    119 #undef	RASOPS_AA
    120 #include <dev/rasops/rasops_putchar.h>
    121 
    122 /* rasops32_putchar_aa */
    123 #define	RASOPS_AA
    124 #include <dev/rasops/rasops_putchar.h>
    125 #undef	RASOPS_AA
    126 
    127 #ifndef RASOPS_SMALL
    128 /*
    129  * Recompute the blitting stamp.
    130  */
    131 static void
    132 rasops32_makestamp(struct rasops_info *ri, long attr)
    133 {
    134 	uint32_t fg, bg;
    135 	int i;
    136 
    137 	stamp_attr = attr;
    138 	stamp_ri = ri;
    139 
    140 	bg = ATTR_BG(ri, attr);
    141 	fg = ATTR_FG(ri, attr);
    142 
    143 	for (i = 0; i < 64; i += 4) {
    144 		stamp[i + 0] = i & 32 ? fg : bg;
    145 		stamp[i + 1] = i & 16 ? fg : bg;
    146 		stamp[i + 2] = i &  8 ? fg : bg;
    147 		stamp[i + 3] = i &  4 ? fg : bg;
    148 	}
    149 }
    150 
    151 /*
    152  * Width-optimized putchar functions
    153  */
    154 #define	RASOPS_WIDTH	8
    155 #include <dev/rasops/rasops_putchar_width.h>
    156 #undef	RASOPS_WIDTH
    157 
    158 #define	RASOPS_WIDTH	12
    159 #include <dev/rasops/rasops_putchar_width.h>
    160 #undef	RASOPS_WIDTH
    161 
    162 #define	RASOPS_WIDTH	16
    163 #include <dev/rasops/rasops_putchar_width.h>
    164 #undef	RASOPS_WIDTH
    165 
    166 #endif /* !RASOPS_SMALL */
    167