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syndilights/blib-1.1.7/modules/bcountdown.c

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/* blib - Library of useful things to hack the Blinkenlights
*
* Copyright (c) 2002 The Blinkenlights Crew
* Sven Neumann <sven@gimp.org>
* Daniel Mack <daniel@yoobay.net>
*
* Inspired by the great 2001 sylvester countdown on the HDL.
*
* This program 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 of the License, or
* (at your option) any later version.
*
* This program 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <stdlib.h>
#include <string.h>
#include <sys/time.h>
#include <unistd.h>
#include <glib.h>
#include <gmodule.h>
#include <blib/blib.h>
#include "digits.h"
#define B_TYPE_COUNTDOWN (b_type_countdown)
#define B_COUNTDOWN(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), B_TYPE_COUNTDOWN, BCountdown))
#define B_COUNTDOWN_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), B_TYPE_COUNTDOWN, BCountdownClass))
#define B_IS_COUNTDOWN(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), B_TYPE_COUNTDOWN))
#define MAX_DIGITS 4
typedef struct _BCountdown BCountdown;
typedef struct _BCountdownClass BCountdownClass;
struct _BCountdown
{
BModule parent_instance;
gchar last_digits[MAX_DIGITS];
gchar last_font;
gchar last_number_of_digits;
gint end;
};
struct _BCountdownClass
{
BModuleClass parent_class;
};
enum
{
PROP_0,
PROP_END
};
static GType b_countdown_get_type (GTypeModule *module);
static void b_countdown_class_init (BCountdownClass *klass);
static void b_countdown_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static gboolean b_countdown_query (gint width,
gint height,
gint channels,
gint maxval);
static gboolean b_countdown_prepare (BModule *module,
GError **error);
static void b_countdown_start (BModule *module);
static gint b_countdown_tick (BModule *module);
static void b_countdown_describe (BModule *module,
const gchar **title,
const gchar **description,
const gchar **author);
static BModuleClass * parent_class = NULL;
static GType b_type_countdown = 0;
G_MODULE_EXPORT gboolean
b_module_register (GTypeModule *module)
{
b_countdown_get_type (module);
return TRUE;
}
GType
b_countdown_get_type (GTypeModule *module)
{
if (!b_type_countdown)
{
static const GTypeInfo countdown_info =
{
sizeof (BCountdownClass),
NULL, /* base_init */
NULL, /* base_finalize */
(GClassInitFunc) b_countdown_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (BCountdown),
0, /* n_preallocs */
NULL /* instance_init */
};
b_type_countdown = g_type_module_register_type (module,
B_TYPE_MODULE,
"BCountdown",
&countdown_info, 0);
}
return b_type_countdown;
}
static void
b_countdown_class_init (BCountdownClass *klass)
{
GObjectClass *object_class;
BModuleClass *module_class;
GParamSpec *param_spec;
object_class = G_OBJECT_CLASS (klass);
module_class = B_MODULE_CLASS (klass);
parent_class = g_type_class_peek_parent (klass);
object_class->set_property = b_countdown_set_property;
param_spec = g_param_spec_int ("end", NULL,
"When to end the countdown.",
0, G_MAXINT, 0,
G_PARAM_CONSTRUCT | G_PARAM_WRITABLE);
g_object_class_install_property (object_class, PROP_END, param_spec);
module_class->query = b_countdown_query;
module_class->prepare = b_countdown_prepare;
module_class->start = b_countdown_start;
module_class->tick = b_countdown_tick;
module_class->describe = b_countdown_describe;
}
static void
b_countdown_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
BCountdown *countdown = B_COUNTDOWN (object);
switch (property_id)
{
case PROP_END:
countdown->end = g_value_get_int (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static gboolean
b_countdown_query (gint width,
gint height,
gint channels,
gint maxval)
{
return (width > 17 && height > 7 && channels == 1 && maxval > 0);
}
static gboolean
b_countdown_prepare (BModule *module,
GError **error)
{
BCountdown *countdown = B_COUNTDOWN (module);
if (countdown->end < 0)
{
g_set_error (error, 0, 0, "Invalid end time for countdown.");
return FALSE;
}
return TRUE;
}
static void
b_countdown_start (BModule *module)
{
gint x;
BCountdown *countdown = B_COUNTDOWN (module);
countdown->last_font = -1;
countdown->last_number_of_digits = -1;
for (x = 0; x < MAX_DIGITS; x++)
{
countdown->last_digits[x] = -1;
}
b_module_ticker_start (module, 1);
}
static gint
b_countdown_tick (BModule *module)
{
BCountdown *countdown = B_COUNTDOWN (module);
struct timeval tv;
gint x0, y0;
gint x, y;
gint n, d, i, f;
gint scrollstep;
gint scroll[MAX_DIGITS];
gint new_digits[MAX_DIGITS];
const BFont *fonts[] = { &b_digits_3x5,
&b_digits_5x7,
&b_digits_8x7 };
gettimeofday (&tv, NULL);
n = countdown->end - tv.tv_sec;
g_print ("BCountdown: %d\n", n);
if (n <= 0 || n > 999)
{
b_module_request_stop (module);
return -1;
}
for (d = 1, i = n; i > 9; d++)
i /= 10;
for (f = (sizeof (fonts) / sizeof (fonts[0])) - 1;
module->width - ((d - 1) * fonts[f]->advance + fonts[f]->width) < 0;
f--)
{
if (f < 0)
{
b_module_request_stop (module);
return -1;
}
}
for (i = 0; i < MAX_DIGITS; i++)
new_digits[i] = ' ';
g_print ("using font #%d, w: %d h: %d a: %d\n",
f, fonts[f]->width, fonts[f]->height, fonts[f]->advance);
if (countdown->last_font != f ||
countdown->last_number_of_digits != d)
b_module_fill (module, 0);
for (i = d; i > 0; i--)
{
new_digits[i] = n % 10;
scroll[i] = (countdown->last_digits[i] == -1)
|| (countdown->last_digits[i] != new_digits[i]);
n /= 10;
}
for (scrollstep = 0; scrollstep < module->height; scrollstep++)
{
x0 = module->width - fonts[f]->width;
y0 = module->height - fonts[f]->height;
/* i'm too tired to think about a smart algorithm... */
if (d == 1)
x0 = 4;
for (i = d; i > 0; i--)
{
if (scroll[i])
{
for (x = 0; x < fonts[f]->width; x++)
{
for (y = module->height; y > 0; y--)
{
module->buffer[(y-1) * module->width + x + x0] =
module->buffer[(y-2) * module->width + x + x0]?
(module->maxval/2):0;
}
module->buffer[x + x0] = 0;
for (y = 0; y < fonts[f]->height; y++)
{
if (y + y0 <= scrollstep + 1)
b_module_draw_point (module, x0 + x, y0 + y + (scrollstep - module->height),
(fonts[f]->data[new_digits[i]][y * fonts[f]->width + x] != '0')?
module->maxval:0);
}
}
}
x0 -= fonts[f]->advance;
}
b_module_paint (module);
usleep (33 * 1000);
}
for (x = 0; x < MAX_DIGITS; x++)
{
countdown->last_digits[x] = new_digits[x];
}
b_module_paint (module);
countdown->last_font = f;
countdown->last_number_of_digits = d;
gettimeofday (&tv, NULL);
return 1000 - (tv.tv_usec / 1000);
}
static void
b_countdown_describe (BModule *module,
const gchar **title,
const gchar **description,
const gchar **author)
{
*title = "BCountdown";
*description = "Countdown";
*author = "Sven Neumann";
}
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