aboutsummaryrefslogtreecommitdiffstats
path: root/drv_NULL.c
blob: ecbbfffe1b08a2ea5fd92958f0dd11dbec6107a5 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
/* $Id$
 * $URL$
 *
 * 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.
 *
 */

/* 
 *
 * 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;

    info("%s: %s", Name, "$Rev$");

    /* 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,
};