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/* $Id: drv_NULL.c,v 1.8 2005/05/08 04:32:44 reinelt Exp $
 *
 * NULL driver (for testing)
 *
 * Copyright (C) 2004 Michael Reinelt <reinelt@eunet.at>
 * Copyright (C) 2004 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
 *
 * This file is part of LCD4Linux.
 *
 * LCD4Linux is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * LCD4Linux is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 *
 * $Log: drv_NULL.c,v $
 * Revision 1.8  2005/05/08 04:32:44  reinelt
 * CodingStyle added and applied
 *
 * Revision 1.7  2005/01/18 06:30:23  reinelt
 * added (C) to all copyright statements
 *
 * Revision 1.6  2004/06/26 12:04:59  reinelt
 *
 * uh-oh... the last CVS log message messed up things a lot...
 *
 * Revision 1.5  2004/06/26 09:27:21  reinelt
 *
 * added '-W' to CFLAGS
 * changed all C++ comments to C ones
 * cleaned up a lot of signed/unsigned mistakes
 *
 * Revision 1.4  2004/06/20 10:09:54  reinelt
 *
 * 'const'ified the whole source
 *
 * Revision 1.3  2004/06/06 06:51:59  reinelt
 *
 * do not display end splash screen if quiet=1
 *
 * Revision 1.2  2004/06/02 09:41:19  reinelt
 *
 * prepared support for startup splash screen
 *
 * Revision 1.1  2004/05/31 16:39:06  reinelt
 *
 * added NULL display driver (for debugging/profiling purposes)
 * added backlight/contrast initialisation for matrixOrbital
 * added Backlight initialisation for Cwlinux
 *
 */

/* 
 *
 * exported fuctions:
 *
 * struct DRIVER drv_NULL
 *
 */

#include "config.h"

#include <stdlib.h>
#include <stdio.h>
#include <string.h>

#include "debug.h"
#include "cfg.h"
#include "plugin.h"
#include "widget.h"
#include "widget_text.h"
#include "widget_bar.h"
#include "drv.h"
#include "drv_generic_text.h"


static char Name[] = "NULL";


/****************************************/
/***  hardware dependant functions    ***/
/****************************************/

static void drv_NULL_write(const __attribute__ ((unused))
			   int row, const __attribute__ ((unused))
			   int col, const __attribute__ ((unused))
			   char *data, const __attribute__ ((unused))
			   int len)
{
    /* empty */
}


static void drv_NULL_defchar(const __attribute__ ((unused))
			     int ascii, const __attribute__ ((unused))
			     unsigned char *matrix)
{
    /* empty */
}


static int drv_NULL_start(const char *section)
{
    char *s;

    s = cfg_get(section, "Size", "20x4");
    if (s == NULL || *s == '\0') {
	error("%s: no '%s.Size' entry from %s", Name, section, cfg_source());
	free(s);
	return -1;
    }
    if (sscanf(s, "%dx%d", &DCOLS, &DROWS) != 2 || DROWS < 1 || DCOLS < 1) {
	error("%s: bad %s.Size '%s' from %s", Name, section, s, cfg_source);
	free(s);
	return -1;
    }
    free(s);

    return 0;
}


/****************************************/
/***            plugins               ***/
/****************************************/

/* none at the moment... */


/****************************************/
/***        widget callbacks          ***/
/****************************************/

/* using drv_generic_text_draw(W) */
/* using drv_generic_text_bar_draw(W) */


/****************************************/
/***        exported functions        ***/
/****************************************/


/* list models */
int drv_NULL_list(void)
{
    printf("generic");
    return 0;
}


/* initialize driver & display */
int drv_NULL_init(const char *section, const __attribute__ ((unused))
		  int quiet)
{
    WIDGET_CLASS wc;
    int ret;

    /* display preferences */
    XRES = 6;			/* pixel width of one char  */
    YRES = 8;			/* pixel height of one char  */
    CHARS = 8;			/* number of user-defineable characters */
    CHAR0 = 0;			/* ASCII of first user-defineable char */
    GOTO_COST = 2;		/* number of bytes a goto command requires */

    /* real worker functions */
    drv_generic_text_real_write = drv_NULL_write;
    drv_generic_text_real_defchar = drv_NULL_defchar;

    /* start display */
    if ((ret = drv_NULL_start(section)) != 0)
	return ret;

    /* initialize generic text driver */
    if ((ret = drv_generic_text_init(section, Name)) != 0)
	return ret;

    /* initialize generic bar driver */
    if ((ret = drv_generic_text_bar_init(1)) != 0)
	return ret;

    /* add fixed chars to the bar driver */
    drv_generic_text_bar_add_segment(0, 0, 255, 32);	/* ASCII  32 = blank */
    drv_generic_text_bar_add_segment(255, 255, 255, '*');	/* asterisk */

    /* register text widget */
    wc = Widget_Text;
    wc.draw = drv_generic_text_draw;
    widget_register(&wc);

    /* register bar widget */
    wc = Widget_Bar;
    wc.draw = drv_generic_text_bar_draw;
    widget_register(&wc);

    /* register plugins */
    /* none at the moment... */

    return 0;
}


/* close driver & display */
int drv_NULL_quit(const __attribute__ ((unused))
		  int quiet)
{

    info("%s: shutting down.", Name);
    drv_generic_text_quit();

    return (0);
}


DRIVER drv_NULL = {
  name:Name,
  list:drv_NULL_list,
  init:drv_NULL_init,
  quit:drv_NULL_quit,
};