The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/dev/rasops/rasops4.c

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    1 /*      $NetBSD: rasops4.c,v 1.28 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: rasops4.c,v 1.28 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 <machine/endian.h>
   42 
   43 #include <dev/wscons/wsdisplayvar.h>
   44 #include <dev/wscons/wsconsio.h>
   45 
   46 #define _RASOPS_PRIVATE
   47 #define RASOPS_DEPTH    4
   48 #include <dev/rasops/rasops.h>
   49 #include <dev/rasops/rasops_masks.h>
   50 
   51 static void     rasops4_copycols(void *, int, int, int, int);
   52 static void     rasops4_erasecols(void *, int, int, int, long);
   53 static void     rasops4_do_cursor(struct rasops_info *);
   54 static void     rasops4_putchar(void *, int, int col, u_int, long);
   55 #ifndef RASOPS_SMALL
   56 static void     rasops4_putchar8(void *, int, int col, u_int, long);
   57 static void     rasops4_putchar12(void *, int, int col, u_int, long);
   58 static void     rasops4_putchar16(void *, int, int col, u_int, long);
   59 static void     rasops4_makestamp(struct rasops_info *, long);
   60 #endif
   61 
   62 #ifndef RASOPS_SMALL
   63 /* stamp for optimized character blitting */
   64 static uint16_t                 stamp[16];
   65 static long                     stamp_attr;
   66 static struct rasops_info       *stamp_ri;
   67 
   68 /*
   69  * offset = STAMP_SHIFT(fontbits, nibble #) & STAMP_MASK
   70  * destination = STAMP_READ(offset)
   71  */
   72 #define STAMP_SHIFT(fb, n)      ((n) ? (fb) >> 4 : (fb))
   73 #define STAMP_MASK              0xf
   74 #define STAMP_READ(o)           stamp[o]
   75 #endif
   76 
   77 /*
   78  * Initialize rasops_info struct for this colordepth.
   79  */
   80 void
   81 rasops4_init(struct rasops_info *ri)
   82 {
   83 
   84         if ((ri->ri_font->fontwidth & 1) != 0) {
   85                 ri->ri_ops.erasecols = rasops4_erasecols;
   86                 ri->ri_ops.copycols = rasops4_copycols;
   87                 ri->ri_do_cursor = rasops4_do_cursor;
   88         }
   89 
   90         switch (ri->ri_font->fontwidth) {
   91 #ifndef RASOPS_SMALL
   92         case 8:
   93                 ri->ri_ops.putchar = rasops4_putchar8;
   94                 break;
   95         case 12:
   96                 ri->ri_ops.putchar = rasops4_putchar12;
   97                 break;
   98         case 16:
   99                 ri->ri_ops.putchar = rasops4_putchar16;
  100                 break;
  101 #endif  /* !RASOPS_SMALL */
  102         default:
  103                 ri->ri_ops.putchar = rasops4_putchar;
  104                 return;
  105         }
  106 
  107 #ifndef RASOPS_SMALL
  108         stamp_attr = -1;
  109         stamp_ri = NULL;
  110 #endif
  111 }
  112 
  113 #ifndef RASOPS_SMALL
  114 /*
  115  * Recompute the blitting stamp.
  116  */
  117 static void
  118 rasops4_makestamp(struct rasops_info *ri, long attr)
  119 {
  120         int i;
  121         uint32_t bg, fg;
  122 
  123         stamp_attr = attr;
  124         stamp_ri = ri;
  125 
  126         bg = ATTR_BG(ri, attr) & 0xf;
  127         fg = ATTR_FG(ri, attr) & 0xf;
  128 
  129         for (i = 0; i < 16; i++) {
  130 #if BYTE_ORDER == LITTLE_ENDIAN
  131                 if ((ri->ri_flg & RI_BSWAP) == 0)
  132 #else
  133                 if ((ri->ri_flg & RI_BSWAP) != 0)
  134 #endif
  135                 {
  136                         /* little endian */
  137                         stamp[i]  = (i & 1 ? fg : bg) << 12;
  138                         stamp[i] |= (i & 2 ? fg : bg) << 8;
  139                         stamp[i] |= (i & 4 ? fg : bg) << 4;
  140                         stamp[i] |= (i & 8 ? fg : bg) << 0;
  141                 } else {
  142                         /* big endian */
  143                         stamp[i]  = (i & 1 ? fg : bg) << 0;
  144                         stamp[i] |= (i & 2 ? fg : bg) << 4;
  145                         stamp[i] |= (i & 4 ? fg : bg) << 8;
  146                         stamp[i] |= (i & 8 ? fg : bg) << 12;
  147                 }
  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 
  168 /* rasops4_putchar */
  169 #undef  RASOPS_AA
  170 #include <dev/rasops/rasops1-4_putchar.h>
  171 
  172 /*
  173  * Grab routines common to depths where (bpp < 8)
  174  */
  175 #include <dev/rasops/rasops_bitops.h>

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