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
|
/*
* event event lister for libcaca
* Copyright (c) 2004 Sam Hocevar <sam@zoy.org>
* All Rights Reserved
*
* $Id$
*
* This program is free software. It comes without any warranty, to
* the extent permitted by applicable law. You can redistribute it
* and/or modify it under the terms of the Do What The Fuck You Want
* To Public License, Version 2, as published by Sam Hocevar. See
* http://sam.zoy.org/wtfpl/COPYING for more details.
*/
#include "config.h"
#include "common.h"
#if !defined(__KERNEL__)
# include <stdio.h>
# include <string.h>
# include <stdlib.h>
#endif
#include "cucul.h"
#include "caca.h"
static int refresh_screen(void);
static cucul_canvas_t *cv, *image;
static caca_display_t *dp;
static int x = 0, y = 0;
int main(int argc, char **argv)
{
int refresh = 1, file = 1;
unsigned int iw = 0, ih = 0;
if(argc < 2)
{
fprintf(stderr, "%s: missing argument (filename).\n", argv[0]);
return 1;
}
cv = cucul_create_canvas(0, 0);
if(!cv)
return 1;
dp = caca_create_display(cv);
if(!dp)
return 1;
for(;;)
{
caca_event_t ev;
unsigned int w, h;
int dx = 0, dy = 0;
if(!image)
{
image = cucul_create_canvas(0, 0);
if(cucul_import_file(image, argv[file], "ansi") < 0)
{
fprintf(stderr, "%s: invalid file `%s'.\n", argv[0], argv[1]);
return 1;
}
ih = cucul_get_canvas_height(image);
iw = cucul_get_canvas_width(image);
x = y = 0;
caca_set_display_title(dp, argv[file]);
refresh = 1;
}
if(refresh)
{
refresh_screen();
refresh = 0;
}
while(caca_get_event(dp, CACA_EVENT_ANY, &ev, -1))
{
switch(caca_get_event_type(&ev))
{
case CACA_EVENT_QUIT:
goto quit;
case CACA_EVENT_KEY_PRESS:
switch(caca_get_event_key_ch(&ev))
{
case CACA_KEY_LEFT: dx -= 2; break;
case CACA_KEY_RIGHT: dx += 2; break;
case CACA_KEY_UP: dy--; break;
case CACA_KEY_DOWN: dy++; break;
case CACA_KEY_PAGEUP: dy -= 12; break;
case CACA_KEY_PAGEDOWN: dy += 12; break;
case CACA_KEY_ESCAPE:
case 'q':
goto quit;
case 'n':
file = file + 1 < argc ? file + 1 : 1;
cucul_free_canvas(image);
image = NULL;
goto stopevents;
case 'p':
file = file > 1 ? file - 1 : argc - 1;
cucul_free_canvas(image);
image = NULL;
goto stopevents;
default:
break;
}
case CACA_EVENT_RESIZE:
refresh = 1;
goto stopevents;
default:
break;
}
}
stopevents:
w = cucul_get_canvas_width(cv);
h = cucul_get_canvas_height(cv);
if(dx | dy)
{
refresh = 1;
x += dx;
y += dy;
if(x < 0) x = 0; else if(x + w > iw) x = iw > w ? iw - w : 0;
if(y < 0) y = 0; else if(y + h > ih) y = ih > h ? ih - h : 0;
}
}
quit:
/* Clean up */
caca_free_display(dp);
cucul_free_canvas(image);
cucul_free_canvas(cv);
return 0;
}
static int refresh_screen(void)
{
cucul_set_color_ansi(cv, CUCUL_DEFAULT, CUCUL_DEFAULT);
cucul_clear_canvas(cv);
cucul_blit(cv, - x, - y, image, NULL);
caca_refresh_display(dp);
return 0;
}
|