source: ttyvaders/trunk/libcaca/graphics.c @ 188

Last change on this file since 188 was 188, checked in by Sam Hocevar, 17 years ago
  • configure.ac: + Added -Wsign-compare to the warning flags.
  • libcaca/caca.c: + Fixed a signed/unsigned bug that caused infinite waits with

ee_set_delay(0).

  • src/weapons.c libcaca/graphics.c libcaca/blit.c libcaca/conic.c: + Fixed minor signed/unsigned comparison warnings.
  • Property svn:keywords set to Id
File size: 3.5 KB
Line 
1/*
2 *   libcaca       ASCII-Art library
3 *   Copyright (c) 2002, 2003 Sam Hocevar <sam@zoy.org>
4 *                 All Rights Reserved
5 *
6 *   $Id: graphics.c 188 2003-11-16 11:26:54Z 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#if defined(USE_SLANG)
26#   include <slang.h>
27#elif defined(USE_NCURSES)
28#   include <curses.h>
29#elif defined(USE_CONIO)
30#   include <conio.h>
31#else
32#   error "no graphics library detected"
33#endif
34
35#include <string.h>
36#include <stdlib.h>
37#include <stdarg.h>
38
39#include "caca.h"
40#include "caca_internals.h"
41
42static int _caca_color = 0;
43
44void caca_set_color(int color)
45{
46    if(color < 0 || color > 15)
47        return;
48
49    _caca_color = color;
50#if defined(USE_SLANG)
51    SLsmg_set_color(color + 1);
52#elif defined(USE_NCURSES)
53    attrset(_caca_attr[color]);
54#elif defined(USE_CONIO)
55    textcolor(color);
56#endif
57}
58
59int caca_get_color(void)
60{
61    return _caca_color;
62}
63
64void caca_putchar(int x, int y, char c)
65{
66    if(x < 0 || x >= (int)caca_get_width() ||
67       y < 0 || y >= (int)caca_get_height())
68        return;
69
70#if defined(USE_SLANG)
71    SLsmg_gotorc(y, x);
72    SLsmg_write_char(c);
73#elif defined(USE_NCURSES)
74    move(y, x);
75    addch(c);
76#elif defined(USE_CONIO)
77    _caca_screen[2 * (x + y * caca_get_width())] = c;
78    _caca_screen[2 * (x + y * caca_get_width()) + 1] = _caca_color;
79//    gotoxy(x + 1, y + 1);
80//    putch(c);
81#endif
82}
83
84void caca_putstr(int x, int y, const char *s)
85{
86    unsigned int len;
87
88    if(y < 0 || y >= (int)caca_get_height() || x >= (int)caca_get_width())
89        return;
90
91    len = strlen(s);
92
93    if(x < 0)
94    {
95        len -= -x;
96        if(len < 0)
97            return;
98        s += -x;
99        x = 0;
100    }
101
102    if(x + len >= caca_get_width())
103    {
104        memcpy(_caca_scratch_line, s, caca_get_width() - x);
105        _caca_scratch_line[caca_get_width() - x] = '\0';
106        s = _caca_scratch_line;
107    }
108
109#if defined(USE_SLANG)
110    SLsmg_gotorc(y, x);
111    SLsmg_write_string(s);
112#elif defined(USE_NCURSES)
113    move(y, x);
114    addstr(s);
115#elif defined(USE_CONIO)
116    char *buf = _caca_screen + 2 * (x + y * caca_get_width());
117    while(*s)
118    {
119        *buf++ = *s++;
120        *buf++ = _caca_color;
121    }
122//    gotoxy(x + 1, y + 1);
123//    cputs(s);
124#endif
125}
126
127void caca_printf(int x, int y, const char *format, ...)
128{
129    char tmp[BUFSIZ];
130    char *buf = tmp;
131    va_list args;
132
133    if(y < 0 || y >= (int)caca_get_height() || x >= (int)caca_get_width())
134        return;
135
136    if(caca_get_width() - x + 1 > BUFSIZ)
137        buf = malloc(caca_get_width() - x + 1);
138
139    va_start(args, format);
140    vsnprintf(buf, caca_get_width() - x + 1, format, args);
141    buf[caca_get_width() - x] = '\0';
142    va_end(args);
143
144    caca_putstr(x, y, buf);
145
146    if(buf != tmp)
147        free(buf);
148}
149
150void caca_clear(void)
151{
152    /* We could use SLsmg_cls() etc., but drawing empty lines is much faster */
153    int y = caca_get_height();
154
155    while(y--)
156        caca_putstr(0, y, _caca_empty_line);
157}
158
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