source: ttyvaders/trunk/libee/ee.c @ 94

Last change on this file since 94 was 94, checked in by Sam Hocevar, 17 years ago
  • libee/ee.c: + got rid of DELAY.
  • test/demo.c: + Minor animation effect.
  • Property svn:keywords set to Id
File size: 4.2 KB
Line 
1/*
2 *   libee         ASCII-Art library
3 *   Copyright (c) 2002, 2003 Sam Hocevar <sam@zoy.org>
4 *                 All Rights Reserved
5 *
6 *   $Id: ee.c 94 2003-11-09 13:52:40Z sam $
7 *
8 *   This program is free software; you can redistribute it and/or modify
9 *   it under the terms of the GNU General Public License as published by
10 *   the Free Software Foundation; either version 2 of the License, or
11 *   (at your option) any later version.
12 *
13 *   This program is distributed in the hope that it will be useful,
14 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
15 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16 *   GNU General Public License for more details.
17 *
18 *   You should have received a copy of the GNU General Public License
19 *   along with this program; if not, write to the Free Software
20 *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 */
22
23#include "config.h"
24
25#include <stdlib.h>
26#include <unistd.h>
27#include <string.h>
28#include <sys/time.h>
29#include <time.h>
30
31#include "ee.h"
32
33static int _ee_delay;
34
35int ee_init(void)
36{
37#ifdef USE_SLANG
38    static char * colors[] = { "black", "green", "yellow", "white",
39        "red", "gray", "lightgray", "blue", "cyan", "magenta", NULL };
40    int i;
41
42    /* Initialize slang library */
43    SLsig_block_signals();
44    SLtt_get_terminfo();
45
46    if(SLkp_init() == -1)
47    {
48        SLsig_unblock_signals();
49        return -1;
50    }
51
52    SLang_init_tty(-1, 0, 1);
53
54    if(SLsmg_init_smg() == -1)
55    {
56        SLsig_unblock_signals();
57        return -1;
58    }
59
60    SLsig_unblock_signals();
61
62    SLsmg_cls();
63    SLtt_set_cursor_visibility(0);
64    SLsmg_refresh();
65
66    for(i = 0; colors[i]; i++)
67    {
68        SLtt_set_color(i + 1, NULL, colors[i], "black");
69    }
70
71#elif USE_NCURSES
72    /* Initialize ncurses library */
73    initscr();
74    keypad(stdscr, TRUE);
75    nonl();
76    cbreak();
77    noecho();
78    nodelay(stdscr, TRUE);
79    curs_set(0);
80
81    start_color();
82
83    init_pair(EE_BLACK, COLOR_BLACK, COLOR_BLACK);
84    init_pair(EE_GREEN, COLOR_GREEN, COLOR_BLACK);
85    init_pair(EE_YELLOW, COLOR_YELLOW, COLOR_BLACK);
86    init_pair(EE_WHITE, COLOR_WHITE, COLOR_BLACK);
87    init_pair(EE_RED, COLOR_RED, COLOR_BLACK);
88    init_pair(EE_GRAY, COLOR_WHITE, COLOR_BLACK); // XXX
89    init_pair(EE_LIGHTGRAY, COLOR_WHITE, COLOR_BLACK); // XXX
90    init_pair(EE_BLUE, COLOR_BLUE, COLOR_BLACK);
91    init_pair(EE_CYAN, COLOR_CYAN, COLOR_BLACK);
92    init_pair(EE_MAGENTA, COLOR_MAGENTA, COLOR_BLACK);
93
94#else
95    /* Dummy driver */
96
97#endif
98    _ee_delay = 0;
99
100    return 0;
101}
102
103void ee_set_delay(int delay)
104{
105    _ee_delay = delay;
106}
107
108int ee_get_width(void)
109{
110#ifdef USE_SLANG
111    return SLtt_Screen_Cols;
112#elif USE_NCURSES
113    return COLS;
114#else
115    return 80;
116#endif
117}
118
119int ee_get_height(void)
120{
121#ifdef USE_SLANG
122    return SLtt_Screen_Rows;
123#elif USE_NCURSES
124    return LINES;
125#else
126    return 25;
127#endif
128}
129
130void ee_clear(void)
131{
132#if defined(USE_SLANG) || defined(USE_NCURSES)
133    /* We could use SLsmg_cls(), but drawing empty lines is much faster */
134    int x = ee_get_width(), y = ee_get_height();
135    char *empty_line = malloc((x + 1) * sizeof(char));
136
137    memset(empty_line, ' ', x);
138    empty_line[x] = '\0';
139
140    while(y--)
141    {
142        ee_goto(0, y);
143        ee_putstr(empty_line);
144    }
145
146    free(empty_line);
147#else
148    /* Use dummy driver */
149#endif
150}
151
152static int64_t local_time(void)
153{
154    struct timeval tv;
155    int64_t now;
156
157    gettimeofday(&tv, NULL);
158    now = tv.tv_sec;
159    now *= 1000000;
160    now += tv.tv_usec;
161    return now;
162}
163
164void ee_refresh(void)
165{
166    static int64_t local_clock = 0;
167    int64_t now;
168
169    ee_goto(0, 0);
170
171    if(!local_clock)
172    {
173        /* Initialize local_clock */
174        local_clock = local_time();
175    }
176
177    if(local_time() > local_clock + 10000)
178    {
179        /* If we are late, we shouldn't display anything */
180    }
181
182#ifdef USE_SLANG
183    SLsmg_refresh();
184#elif USE_NCURSES
185    refresh();
186#else
187    /* Use dummy driver */
188#endif
189
190    now = local_time();
191
192    if(now < local_clock + _ee_delay - 10000)
193    {
194        usleep(local_clock + _ee_delay - 10000 - now);
195    }
196
197    local_clock += _ee_delay;
198}
199
200void ee_end(void)
201{
202#ifdef USE_SLANG
203    SLtt_set_cursor_visibility(1);
204    SLang_reset_tty();
205    SLsmg_reset_smg();
206#elif USE_NCURSES
207    curs_set(1);
208    endwin();
209#else
210    /* Use dummy driver */
211#endif
212}
213
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