source: libcaca/trunk/examples/swallow.c @ 3495

Last change on this file since 3495 was 3495, checked in by Sam Hocevar, 11 years ago

Add caca_export_area_to_memory() to export only a selected part of the
current canvas. This is useful to export dirty rectangles. Accordingly,
add caca_import_area_from_memory() and caca_import_area_from_file().

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File size: 3.1 KB
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1/*
2 *  swallow       swallow another libcaca application
3 *  Copyright (c) 2006-2009 Sam Hocevar <sam@hocevar.net>
4 *                All Rights Reserved
5 *
6 *  $Id: swallow.c 3495 2009-05-21 20:55:21Z sam $
7 *
8 *  This program is free software. It comes without any warranty, to
9 *  the extent permitted by applicable law. You can redistribute it
10 *  and/or modify it under the terms of the Do What The Fuck You Want
11 *  To Public License, Version 2, as published by Sam Hocevar. See
12 *  http://sam.zoy.org/wtfpl/COPYING for more details.
13 */
14
15#include "config.h"
16
17#if !defined(__KERNEL__)
18#   include <stdio.h>
19#   include <string.h>
20#   include <stdlib.h>
21#endif
22
23#include "caca.h"
24
25int main(int argc, char **argv)
26{
27    char cmd[BUFSIZ];
28    static caca_canvas_t *cv, *app;
29    static caca_display_t *dp;
30    uint8_t *buf[4];
31    long int bytes[4], total[4];
32    FILE *f[4];
33    int w, h, i;
34
35    if(argc < 5)
36    {
37        fprintf(stderr, "usage: %s <cmd1> <cmd2> <cmd3> <cmd4>\n", argv[0]);
38        return 1;
39    }
40
41    cv = caca_create_canvas(0, 0);
42    app = caca_create_canvas(0, 0);
43    dp = caca_create_display(cv);
44
45    if(cv == NULL || app == NULL )
46    {
47        printf("Can't created canvas\n");
48        return -1;
49    }
50    if(dp == NULL)
51    {
52        printf("Can't create display\n");
53        return -1;
54    }
55
56    w = (caca_get_canvas_width(cv) - 4) / 2;
57    h = (caca_get_canvas_height(cv) - 6) / 2;
58
59    if(w < 0 || h < 0)
60        return 1;
61
62    caca_set_color_ansi(cv, CACA_WHITE, CACA_BLUE);
63    caca_draw_line(cv, 0, 0, caca_get_canvas_width(cv) - 1, 0, ' ');
64    caca_printf(cv, caca_get_canvas_width(cv) / 2 - 10, 0,
65                 "libcaca multiplexer");
66
67    for(i = 0; i < 4; i++)
68    {
69        buf[i] = NULL;
70        total[i] = bytes[i] = 0;
71        sprintf(cmd, "CACA_DRIVER=raw CACA_GEOMETRY=%ix%i %s",
72                     w, h, argv[i + 1]);
73        f[i] = popen(cmd, "r");
74        if(!f[i])
75            return 1;
76        caca_printf(cv, (w + 2) * (i / 2) + 1,
77                         (h + 2) * ((i % 2) + 1), "%s", argv[i + 1]);
78    }
79
80    for(;;)
81    {
82        caca_event_t ev;
83        int ret = caca_get_event(dp, CACA_EVENT_ANY, &ev, 0);
84
85        if(ret && caca_get_event_type(&ev) & CACA_EVENT_KEY_PRESS)
86            break;
87
88        for(i = 0; i < 4; i++)
89        {
90            bytes[i] = caca_import_canvas_from_memory(app, buf[i],
91                                                      total[i], "caca");
92
93            if(bytes[i] > 0)
94            {
95                total[i] -= bytes[i];
96                memmove(buf[i], buf[i] + bytes[i], total[i]);
97
98                caca_blit(cv, (w + 2) * (i / 2) + 1,
99                               (h + 2) * (i % 2) + 2, app, NULL);
100                caca_refresh_display(dp);
101            }
102            else if(bytes[i] == 0)
103            {
104                buf[i] = realloc(buf[i], total[i] + 128);
105                fread(buf[i] + total[i], 128, 1, f[i]);
106                total[i] += 128;
107            }
108            else
109            {
110                fprintf(stderr, "%s: corrupted input %i\n", argv[0], i);
111                return -1;
112            }
113        }
114    }
115
116    /* Clean up */
117    caca_free_display(dp);
118    caca_free_canvas(cv);
119    caca_free_canvas(app);
120
121    return 0;
122}
123
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