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/syscons/scgfbrndr.c

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 1999 Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp>
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer as
   12  *    the first lines of this file unmodified.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
   18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   20  * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
   21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   27  *
   28  * Copyright (c) 2000 Andrew Miklic
   29  */
   30 
   31 #include <sys/cdefs.h>
   32 __FBSDID("$FreeBSD$");
   33 
   34 #include "opt_syscons.h"
   35 #ifdef __powerpc__
   36 #include "opt_ofwfb.h"
   37 #endif
   38 
   39 #include <sys/param.h>
   40 #include <sys/systm.h>
   41 #include <sys/kernel.h>
   42 #include <sys/fbio.h>
   43 #include <sys/consio.h>
   44 
   45 #include <machine/bus.h>
   46 
   47 #include <dev/fb/fbreg.h>
   48 #include <dev/syscons/syscons.h>
   49 
   50 #ifndef SC_RENDER_DEBUG
   51 #define SC_RENDER_DEBUG         0
   52 #endif
   53 
   54 static vr_clear_t               gfb_clear;
   55 static vr_draw_border_t         gfb_border;
   56 static vr_draw_t                gfb_draw;
   57 static vr_set_cursor_t          gfb_cursor_shape;
   58 static vr_draw_cursor_t         gfb_cursor;
   59 static vr_blink_cursor_t        gfb_blink;
   60 #ifndef SC_NO_CUTPASTE
   61 static vr_draw_mouse_t          gfb_mouse;
   62 #else
   63 #define gfb_mouse               (vr_draw_mouse_t *)gfb_nop
   64 #endif
   65 
   66 static void                     gfb_nop(scr_stat *scp);
   67 
   68 sc_rndr_sw_t txtrndrsw = {
   69         (vr_init_t *)gfb_nop,
   70         gfb_clear,
   71         gfb_border,
   72         gfb_draw,       
   73         gfb_cursor_shape,
   74         gfb_cursor,
   75         gfb_blink,
   76         (vr_set_mouse_t *)gfb_nop,
   77         gfb_mouse,
   78 };
   79 
   80 #ifdef SC_PIXEL_MODE
   81 sc_rndr_sw_t gfbrndrsw = {
   82         (vr_init_t *)gfb_nop,
   83         gfb_clear,
   84         gfb_border,
   85         gfb_draw,
   86         gfb_cursor_shape,
   87         gfb_cursor,
   88         gfb_blink,
   89         (vr_set_mouse_t *)gfb_nop,
   90         gfb_mouse,
   91 };
   92 #endif /* SC_PIXEL_MODE */
   93 
   94 #ifndef SC_NO_MODE_CHANGE
   95 sc_rndr_sw_t grrndrsw = {
   96         (vr_init_t *)gfb_nop,
   97         (vr_clear_t *)gfb_nop,
   98         gfb_border,
   99         (vr_draw_t *)gfb_nop,
  100         (vr_set_cursor_t *)gfb_nop,
  101         (vr_draw_cursor_t *)gfb_nop,
  102         (vr_blink_cursor_t *)gfb_nop,
  103         (vr_set_mouse_t *)gfb_nop,
  104         (vr_draw_mouse_t *)gfb_nop,
  105 };
  106 #endif /* SC_NO_MODE_CHANGE */
  107 
  108 #ifndef SC_NO_CUTPASTE
  109 static u_char mouse_pointer[16] = {
  110         0x00, 0x40, 0x60, 0x70, 0x78, 0x7c, 0x7e, 0x68,
  111         0x0c, 0x0c, 0x06, 0x06, 0x00, 0x00, 0x00, 0x00
  112 };
  113 #endif
  114 
  115 static void
  116 gfb_nop(scr_stat *scp)
  117 {
  118 }
  119 
  120 /* text mode renderer */
  121 
  122 static void
  123 gfb_clear(scr_stat *scp, int c, int attr)
  124 {
  125         vidd_clear(scp->sc->adp);
  126 }
  127 
  128 static void
  129 gfb_border(scr_stat *scp, int color)
  130 {
  131         vidd_set_border(scp->sc->adp, color);
  132 }
  133 
  134 static void
  135 gfb_draw(scr_stat *scp, int from, int count, int flip)
  136 {
  137         int c;
  138         int a;
  139         int i, n;
  140         video_adapter_t *adp;
  141 
  142         adp = scp->sc->adp;
  143 
  144         /*
  145            Determine if we need to scroll based on the offset
  146            and the number of characters to be displayed...
  147          */
  148         if (from + count > scp->xsize*scp->ysize) {
  149                 /*
  150                    Calculate the number of characters past the end of the
  151                    visible screen...
  152                 */
  153                 count = (from + count) -
  154                     (adp->va_info.vi_width * adp->va_info.vi_height);
  155 
  156                 /*
  157                    Calculate the number of rows past the end of the visible
  158                    screen...
  159                 */
  160                 n = (count / adp->va_info.vi_width) + 1;
  161 
  162                 /* Scroll to make room for new text rows... */
  163                 vidd_copy(adp, n, 0, n);
  164 #if 0
  165                 vidd_clear(adp, n);
  166 #endif
  167 
  168                 /* Display new text rows... */
  169                 vidd_puts(adp, from,
  170                     (u_int16_t *)sc_vtb_pointer(&scp->vtb, from), count);
  171         }
  172 
  173         /*
  174            We don't need to scroll, so we can just put the characters
  175            all-at-once...
  176         */
  177         else {
  178                 /*
  179                    Determine the method by which we are to display characters
  180                    (are we going to print forwards or backwards?
  181                    do we need to do a character-by-character copy, then?)...
  182                 */
  183                 if (flip)
  184                         for (i = count; i-- > 0; ++from) {
  185                                 c = sc_vtb_getc(&scp->vtb, from);
  186                                 a = sc_vtb_geta(&scp->vtb, from) >> 8;
  187                                 vidd_putc(adp, from, c,
  188                                     (a >> 4) | ((a & 0xf) << 4));
  189                         }
  190                 else {
  191                         vidd_puts(adp, from,
  192                             (u_int16_t *)sc_vtb_pointer(&scp->vtb, from),
  193                             count);
  194                 }
  195         }
  196 }
  197 
  198 static void 
  199 gfb_cursor_shape(scr_stat *scp, int base, int height, int blink)
  200 {
  201         if (base < 0 || base >= scp->font_size)
  202                 return;
  203         /* the caller may set height <= 0 in order to disable the cursor */
  204 #if 0
  205         scp->cursor_base = base;
  206         scp->cursor_height = height;
  207 #endif
  208         vidd_set_hw_cursor_shape(scp->sc->adp, base, height, scp->font_size,
  209             blink);
  210 }
  211 
  212 static int pxlblinkrate = 0;
  213 
  214 #if defined(SC_OFWFB)
  215 static void
  216 gfb_cursor(scr_stat *scp, int at, int blink, int on, int flip)
  217 {
  218         video_adapter_t *adp;
  219         int a, c;
  220 
  221         if (scp->curs_attr.height <= 0) /* the text cursor is disabled */
  222                 return;
  223 
  224         adp = scp->sc->adp;
  225         if(blink) {
  226                 scp->status |= VR_CURSOR_BLINK;
  227                 if (on) {
  228                         scp->status |= VR_CURSOR_ON;
  229                         vidd_set_hw_cursor(adp, at%scp->xsize, at/scp->xsize);
  230                 } else {
  231                         if (scp->status & VR_CURSOR_ON)
  232                                 vidd_set_hw_cursor(adp, -1, -1);
  233                         scp->status &= ~VR_CURSOR_ON;
  234                 }
  235         } else {
  236                 scp->status &= ~VR_CURSOR_BLINK;
  237                 if(on) {
  238                         scp->status |= VR_CURSOR_ON;
  239                         vidd_putc(scp->sc->adp, scp->cursor_oldpos,
  240                             sc_vtb_getc(&scp->vtb, scp->cursor_oldpos),
  241                             sc_vtb_geta(&scp->vtb, scp->cursor_oldpos) >> 8);
  242                         a = sc_vtb_geta(&scp->vtb, at) >> 8;
  243                         c = sc_vtb_getc(&scp->vtb, at);
  244                         vidd_putc(scp->sc->adp, at, c,
  245                             (a >> 4) | ((a & 0xf) << 4));
  246                 } else {
  247                         if (scp->status & VR_CURSOR_ON)
  248                                 vidd_putc(scp->sc->adp, at,
  249                                     sc_vtb_getc(&scp->vtb, at),
  250                                     sc_vtb_geta(&scp->vtb, at) >> 8);
  251                         scp->status &= ~VR_CURSOR_ON;
  252                 }
  253         }
  254 }
  255 #else
  256 static void 
  257 gfb_cursor(scr_stat *scp, int at, int blink, int on, int flip)
  258 {
  259         video_adapter_t *adp;
  260 
  261         adp = scp->sc->adp;
  262         if (scp->curs_attr.height <= 0) 
  263                 /* the text cursor is disabled */
  264                 return;
  265 
  266         if (on) {
  267                 if (!blink) {
  268                         scp->status |= VR_CURSOR_ON;
  269                         vidd_set_hw_cursor(adp, at%scp->xsize, at/scp->xsize);
  270                 } else if (++pxlblinkrate & 4) {
  271                         pxlblinkrate = 0;
  272                         scp->status ^= VR_CURSOR_ON;
  273                         if(scp->status & VR_CURSOR_ON)
  274                                 vidd_set_hw_cursor(adp, at%scp->xsize,
  275                                     at/scp->xsize);
  276                         else
  277                                 vidd_set_hw_cursor(adp, -1, -1);
  278                 }
  279         } else {
  280                 if (scp->status & VR_CURSOR_ON)
  281                         vidd_set_hw_cursor(adp, at%scp->xsize, at/scp->xsize);
  282                 scp->status &= ~VR_CURSOR_ON;
  283         }
  284         if (blink)
  285                 scp->status |= VR_CURSOR_BLINK;
  286         else
  287                 scp->status &= ~VR_CURSOR_BLINK;
  288 }
  289 #endif
  290 
  291 static void
  292 gfb_blink(scr_stat *scp, int at, int flip)
  293 {
  294         if (!(scp->status & VR_CURSOR_BLINK))
  295                 return;
  296         if (!(++pxlblinkrate & 4))
  297                 return;
  298         pxlblinkrate = 0;
  299         scp->status ^= VR_CURSOR_ON;
  300         gfb_cursor(scp, at, scp->status & VR_CURSOR_BLINK,
  301             scp->status & VR_CURSOR_ON, flip);
  302 }
  303 
  304 #ifndef SC_NO_CUTPASTE
  305 
  306 static void 
  307 gfb_mouse(scr_stat *scp, int x, int y, int on)
  308 {
  309         if (on) {
  310                 vidd_putm(scp->sc->adp, x, y, mouse_pointer,
  311                     0xffffffff, 16, 8);
  312         } else {
  313                 /* XXX: removal is incomplete for h/w cursors and borders. */
  314         }
  315 }
  316 
  317 #endif /* SC_NO_CUTPASTE */

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