scvidctl.c

基于组件方式开发操作系统的OSKIT源代码

/*-
 * Copyright (c) 1998 Kazutaka YOKOTA <[e-mail]>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer as
 *    the first lines of this file unmodified.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * $Id: scvidctl.c,v 1.7.2.1 1999/02/07 03:03:26 yokota Exp $
 */

#include "sc.h"
#include "opt_syscons.h"

#if NSC > 0

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/signalvar.h>
#include <sys/tty.h>
#include <sys/kernel.h>

#ifdef __i386__
#include <machine/apm_bios.h>
#endif
#include <machine/console.h>

#include <dev/fb/fbreg.h>
#include <dev/syscons/syscons.h>

/* for compatibility with previous versions */
typedef struct old_video_adapter {
    int			va_index;
    int			va_type;
    int			va_flags;
#define V_ADP_COLOR	(1<<0)
#define V_ADP_MODECHANGE (1<<1)
#define V_ADP_STATESAVE	(1<<2)
#define V_ADP_STATELOAD	(1<<3)
#define V_ADP_FONT	(1<<4)
#define V_ADP_PALETTE	(1<<5)
#define V_ADP_BORDER	(1<<6)
#define V_ADP_VESA	(1<<7)
    int			va_crtc_addr;
    u_int		va_window;	/* virtual address */
    size_t		va_window_size;
    size_t		va_window_gran;
    u_int		va_buffer;	/* virtual address */
    size_t		va_buffer_size;
    int			va_initial_mode;
    int			va_initial_bios_mode;
    int			va_mode;
} old_video_adapter_t;

#define OLD_CONS_ADPINFO _IOWR('c', 101, old_video_adapter_t)

/* variables */
extern scr_stat *cur_console;
extern int fonts_loaded;
extern int sc_history_size;
extern u_char palette[];

int
sc_set_text_mode(scr_stat *scp, struct tty *tp, int mode, int xsize, int ysize,
		 int fontsize)
{
    video_info_t info;
    int error;
    int s;
    int i;

    if ((*vidsw[scp->ad]->get_info)(scp->adp, mode, &info))
	return ENODEV;
 
    /* adjust argument values */
    if (fontsize <= 0)
	fontsize = info.vi_cheight;
    if (fontsize < 14) {
	fontsize = 8;
	if (!(fonts_loaded & FONT_8))
	    return EINVAL;
    } else if (fontsize >= 16) {
	fontsize = 16;
	if (!(fonts_loaded & FONT_16))
	    return EINVAL;
    } else {
	fontsize = 14;
	if (!(fonts_loaded & FONT_14))
	    return EINVAL;
    }
    if ((xsize <= 0) || (xsize > info.vi_width))
	xsize = info.vi_width;
    if ((ysize <= 0) || (ysize > info.vi_height))
	ysize = info.vi_height;

    /* stop screen saver, etc */
    s = spltty();
    if ((error = sc_clean_up(scp))) {
	splx(s);
	return error;
    }

    /* set up scp */
    if (scp->history != NULL)
	i = imax(scp->history_size / scp->xsize 
		 - imax(sc_history_size, scp->ysize), 0);
    else
	i = 0;
    /*
     * This is a kludge to fend off scrn_update() while we
     * muck around with scp. XXX
     */
    scp->status |= UNKNOWN_MODE;
    scp->status &= ~(GRAPHICS_MODE | PIXEL_MODE);
    scp->mode = mode;
    scp->font_size = fontsize;
    scp->xsize = xsize;
    scp->ysize = ysize;
    scp->xoff = 0;
    scp->yoff = 0;
    scp->xpixel = scp->xsize*8;
    scp->ypixel = scp->ysize*fontsize;

    /* allocate buffers */
    sc_alloc_scr_buffer(scp, TRUE, TRUE);
    if (ISMOUSEAVAIL(scp->adp->va_flags))
	sc_alloc_cut_buffer(scp, FALSE);
    sc_alloc_history_buffer(scp, sc_history_size, i, FALSE);
    splx(s);

    if (scp == cur_console)
	set_mode(scp);
    scp->status &= ~UNKNOWN_MODE;

    if (tp == NULL)
	return 0;
    if (tp->t_winsize.ws_col != scp->xsize
	|| tp->t_winsize.ws_row != scp->ysize) {
	tp->t_winsize.ws_col = scp->xsize;
	tp->t_winsize.ws_row = scp->ysize;
	pgsignal(tp->t_pgrp, SIGWINCH, 1);
    }

    return 0;
}

int
sc_set_graphics_mode(scr_stat *scp, struct tty *tp, int mode)
{
    video_info_t info;
    int error;
    int s;

    if ((*vidsw[scp->ad]->get_info)(scp->adp, mode, &info))
	return ENODEV;

    /* stop screen saver, etc */
    s = spltty();
    if ((error = sc_clean_up(scp))) {
	splx(s);
	return error;
    }

    /* set up scp */
    scp->status |= (UNKNOWN_MODE | GRAPHICS_MODE);
    scp->status &= ~PIXEL_MODE;
    scp->mode = mode;
    scp->xoff = 0;
    scp->yoff = 0;
    scp->xpixel = info.vi_width;
    scp->ypixel = info.vi_height;
    scp->xsize = info.vi_width/8;
    scp->ysize = info.vi_height/info.vi_cheight;
    scp->font_size = FONT_NONE;
    /* move the mouse cursor at the center of the screen */
    sc_move_mouse(scp, scp->xpixel / 2, scp->ypixel / 2);
    splx(s);

    if (scp == cur_console)
	set_mode(scp);
    /* clear_graphics();*/
    scp->status &= ~UNKNOWN_MODE;

    if (tp == NULL)
	return 0;
    if (tp->t_winsize.ws_xpixel != scp->xpixel
	|| tp->t_winsize.ws_ypixel != scp->ypixel) {
	tp->t_winsize.ws_xpixel = scp->xpixel;
	tp->t_winsize.ws_ypixel = scp->ypixel;
	pgsignal(tp->t_pgrp, SIGWINCH, 1);
    }

    return 0;
}

int
sc_set_pixel_mode(scr_stat *scp, struct tty *tp, int xsize, int ysize, 
		  int fontsize)
{
    video_info_t info;
    int error;
    int s;
    int i;

    if ((*vidsw[scp->ad]->get_info)(scp->adp, scp->mode, &info))
	return ENODEV;		/* this shouldn't happen */

#ifdef SC_VIDEO_DEBUG
    if (scp->scr_buf != NULL) {
	printf("set_pixel_mode(): mode:%x, col:%d, row:%d, font:%d\n",
	       scp->mode, xsize, ysize, fontsize);
    }
#endif

    /* adjust argument values */
    if ((fontsize <= 0) || (fontsize == FONT_NONE))
	fontsize = info.vi_cheight;
    if (fontsize < 14) {
	fontsize = 8;
	if (!(fonts_loaded & FONT_8))
	    return EINVAL;
    } else if (fontsize >= 16) {
	fontsize = 16;
	if (!(fonts_loaded & FONT_16))
	    return EINVAL;
    } else {
	fontsize = 14;
	if (!(fonts_loaded & FONT_14))
	    return EINVAL;
    }
    if (xsize <= 0)
	xsize = info.vi_width/8;
    if (ysize <= 0)
	ysize = info.vi_height/fontsize;

#ifdef SC_VIDEO_DEBUG
    if (scp->scr_buf != NULL) {
	printf("set_pixel_mode(): mode:%x, col:%d, row:%d, font:%d\n",
	       scp->mode, xsize, ysize, fontsize);
	printf("set_pixel_mode(): window:%x, %dx%d, xoff:%d, yoff:%d\n",
	       scp->adp->va_window, info.vi_width, info.vi_height, 
	       (info.vi_width/8 - xsize)/2,
	       (info.vi_height/fontsize - ysize)/2);
    }
#endif

    if ((info.vi_width < xsize*8) || (info.vi_height < ysize*fontsize))
	return EINVAL;

    /* only 16 color, 4 plane modes are supported XXX */
    if ((info.vi_depth != 4) || (info.vi_planes != 4))
	return ENODEV;

    /*
     * set_pixel_mode() currently does not support video modes whose
     * memory size is larger than 64K. Because such modes require
     * bank switching to access the entire screen. XXX
     */
    if (info.vi_width*info.vi_height/8 > info.vi_window_size)
	return ENODEV;

    /* stop screen saver, etc */
    s = spltty();
    if ((error = sc_clean_up(scp))) {
	splx(s);
	return error;
    }

    /* set up scp */
    if (scp->history != NULL)
	i = imax(scp->history_size / scp->xsize 
		 - imax(sc_history_size, scp->ysize), 0);
    else
	i = 0;
    scp->status |= (UNKNOWN_MODE | PIXEL_MODE);