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/* $Id: drv_NULL.c 975 2009-01-18 11:16:20Z michael $
* $URL: https://ssl.bulix.org/svn/lcd4linux/trunk/drv_NULL.c $
*
* NULL driver (for testing)
*
* Copyright (C) 2004 Michael Reinelt <michael@reinelt.co.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.
*
*/
/*
*
* 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("NULL driver for testing purposes");
return 0;
}
/* initialize driver & display */
int drv_NULL_init(const char *section, const __attribute__ ((unused))
int quiet)
{
WIDGET_CLASS wc;
int ret;
info("%s: %s", Name, "$Rev: 975 $");
/* 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,
};
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