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/rasops32.c

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    1 /*       $NetBSD: rasops32.c,v 1.12 2003/04/16 23:28:41 petrov 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  * 3. All advertising materials mentioning features or use of this software
   19  *    must display the following acknowledgement:
   20  *      This product includes software developed by the NetBSD
   21  *      Foundation, Inc. and its contributors.
   22  * 4. Neither the name of The NetBSD Foundation nor the names of its
   23  *    contributors may be used to endorse or promote products derived
   24  *    from this software without specific prior written permission.
   25  *
   26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   36  * POSSIBILITY OF SUCH DAMAGE.
   37  */
   38 
   39 #include <sys/cdefs.h>
   40 __KERNEL_RCSID(0, "$NetBSD: rasops32.c,v 1.12 2003/04/16 23:28:41 petrov Exp $");
   41 
   42 #include "opt_rasops.h"
   43 
   44 #include <sys/param.h>
   45 #include <sys/systm.h>
   46 #include <sys/time.h>
   47 
   48 #include <dev/wscons/wsdisplayvar.h>
   49 #include <dev/wscons/wsconsio.h>
   50 #include <dev/rasops/rasops.h>
   51 
   52 static void     rasops32_putchar __P((void *, int, int, u_int, long attr));
   53 
   54 /*
   55  * Initialize a 'rasops_info' descriptor for this depth.
   56  */
   57 void
   58 rasops32_init(ri)
   59         struct rasops_info *ri;
   60 {
   61 
   62         if (ri->ri_rnum == 0) {
   63                 ri->ri_rnum = 8;
   64                 ri->ri_rpos = 0;
   65                 ri->ri_gnum = 8;
   66                 ri->ri_gpos = 8;
   67                 ri->ri_bnum = 8;
   68                 ri->ri_bpos = 16;
   69         }
   70 
   71         ri->ri_ops.putchar = rasops32_putchar;
   72 }
   73 
   74 /*
   75  * Paint a single character.
   76  */
   77 static void
   78 rasops32_putchar(cookie, row, col, uc, attr)
   79         void *cookie;
   80         int row, col;
   81         u_int uc;
   82         long attr;
   83 {
   84         int width, height, cnt, fs, fb, clr[2];
   85         struct rasops_info *ri;
   86         int32_t *dp, *rp;
   87         u_char *fr;
   88 
   89         ri = (struct rasops_info *)cookie;
   90 
   91 #ifdef RASOPS_CLIPPING
   92         /* Catches 'row < 0' case too */
   93         if ((unsigned)row >= (unsigned)ri->ri_rows)
   94                 return;
   95 
   96         if ((unsigned)col >= (unsigned)ri->ri_cols)
   97                 return;
   98 #endif
   99 
  100         /* check if character fits into font limits */
  101         if (uc < ri->ri_font->firstchar ||
  102             (uc - ri->ri_font->firstchar) >= ri->ri_font->numchars)
  103             return;
  104 
  105         rp = (int32_t *)(ri->ri_bits + row*ri->ri_yscale + col*ri->ri_xscale);
  106 
  107         height = ri->ri_font->fontheight;
  108         width = ri->ri_font->fontwidth;
  109 
  110         clr[0] = ri->ri_devcmap[(attr >> 16) & 0xf];
  111         clr[1] = ri->ri_devcmap[(attr >> 24) & 0xf];
  112 
  113         if (uc == ' ') {
  114                 while (height--) {
  115                         dp = rp;
  116                         DELTA(rp, ri->ri_stride, int32_t *);
  117 
  118                         for (cnt = width; cnt; cnt--)
  119                                 *dp++ = clr[0];
  120                 }
  121         } else {
  122                 uc -= ri->ri_font->firstchar;
  123                 fr = (u_char *)ri->ri_font->data + uc * ri->ri_fontscale;
  124                 fs = ri->ri_font->stride;
  125 
  126                 while (height--) {
  127                         dp = rp;
  128                         fb = fr[3] | (fr[2] << 8) | (fr[1] << 16) |
  129                             (fr[0] << 24);
  130                         fr += fs;
  131                         DELTA(rp, ri->ri_stride, int32_t *);
  132 
  133                         for (cnt = width; cnt; cnt--) {
  134                                 *dp++ = clr[(fb >> 31) & 1];
  135                                 fb <<= 1;
  136                         }
  137                 }
  138         }
  139 
  140         /* Do underline */
  141         if ((attr & 1) != 0) {
  142                 DELTA(rp, -(ri->ri_stride << 1), int32_t *);
  143 
  144                 while (width--)
  145                         *rp++ = clr[1];
  146         }
  147 }

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