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