source: libcaca/trunk/examples/export.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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1/*
2 *  export        libcaca export test program
3 *  Copyright (c) 2006-2009 Sam Hocevar <sam@hocevar.net>
4 *                All Rights Reserved
5 *
6 *  $Id: export.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 <stdlib.h>
20#   include <string.h>
21#endif
22
23#include "caca.h"
24
25#define WIDTH 80
26#define HEIGHT 32
27
28uint32_t pixels[256*256];
29
30int main(int argc, char *argv[])
31{
32    caca_canvas_t *cv;
33    caca_dither_t *dither;
34    void *buffer;
35    char *file, *format;
36    char const * const * exports, * const * p;
37    size_t len;
38    int x, y;
39
40    exports = caca_get_export_list();
41
42    if(argc < 2 || argc > 3)
43    {
44        fprintf(stderr, "%s: wrong argument count\n", argv[0]);
45        fprintf(stderr, "usage: %s [file] <format>\n", argv[0]);
46        fprintf(stderr, "where <format> is one of:\n");
47        for(p = exports; *p; p += 2)
48            fprintf(stderr, " \"%s\" (%s)\n", *p, *(p + 1));
49        exit(-1);
50    }
51
52    if(argc == 2)
53    {
54        file = NULL;
55        format = argv[1];
56    }
57    else
58    {
59        file = argv[1];
60        format = argv[2];
61    }
62
63    for(p = exports; *p; p += 2)
64        if(!strcasecmp(format, *p))
65            break;
66
67    if(!*p)
68    {
69        fprintf(stderr, "%s: unknown format `%s'\n", argv[0], format);
70        fprintf(stderr, "please use one of:\n");
71        for(p = exports; *p; p += 2)
72            fprintf(stderr, " \"%s\" (%s)\n", *p, *(p + 1));
73        exit(-1);
74    }
75
76    if(file)
77    {
78        cv = caca_create_canvas(0, 0);
79        if(caca_import_canvas_from_file(cv, file, "") < 0)
80        {
81            fprintf(stderr, "%s: `%s' has unknown format\n", argv[0], file);
82            exit(-1);
83        }
84    }
85    else
86    {
87        cv = caca_create_canvas(WIDTH, HEIGHT);
88
89        for(y = 0; y < 256; y++)
90        {
91            for(x = 0; x < 256; x++)
92            {
93                uint32_t r = x;
94                uint32_t g = (255 - y + x) / 2;
95                uint32_t b = y * (255 - x) / 256;
96                pixels[y * 256 + x] = (r << 16) | (g << 8) | (b << 0);
97            }
98        }
99
100        dither = caca_create_dither(32, 256, 256, 4 * 256,
101                                     0x00ff0000, 0x0000ff00, 0x000000ff, 0x0);
102        if(!strcmp(format, "ansi") || !strcmp(format, "utf8"))
103            caca_set_dither_charset(dither, "shades");
104        caca_dither_bitmap(cv, 0, 0, caca_get_canvas_width(cv),
105                            caca_get_canvas_height(cv), dither, pixels);
106        caca_free_dither(dither);
107
108        caca_set_color_ansi(cv, CACA_WHITE, CACA_BLACK);
109        caca_draw_thin_box(cv, 0, 0, WIDTH - 1, HEIGHT - 1);
110
111        caca_set_color_ansi(cv, CACA_BLACK, CACA_WHITE);
112        caca_fill_ellipse(cv, WIDTH / 2, HEIGHT / 2,
113                               WIDTH / 4, HEIGHT / 4, ' ');
114
115        caca_set_color_ansi(cv, CACA_LIGHTGRAY, CACA_BLACK);
116        caca_put_str(cv, WIDTH / 2 - 12, HEIGHT / 2 - 6,
117                      "   lightgray on black   ");
118        caca_set_color_ansi(cv, CACA_DEFAULT, CACA_TRANSPARENT);
119        caca_put_str(cv, WIDTH / 2 - 12, HEIGHT / 2 - 5,
120                      " default on transparent ");
121        caca_set_color_ansi(cv, CACA_BLACK, CACA_WHITE);
122        caca_put_str(cv, WIDTH / 2 - 12, HEIGHT / 2 - 4,
123                      "     black on white     ");
124
125        caca_set_color_ansi(cv, CACA_BLACK, CACA_WHITE);
126        caca_put_str(cv, WIDTH / 2 - 8, HEIGHT / 2 - 3, "[<><><><> <>--<>]");
127        caca_put_str(cv, WIDTH / 2 - 8, HEIGHT / 2 - 2, "[ドラゴン ボーレ]");
128        caca_put_str(cv, WIDTH / 2 - 7, HEIGHT / 2 + 2, "äβç ░▒▓█▓▒░ ΔЗҒ");
129        caca_put_str(cv, WIDTH / 2 - 5, HEIGHT / 2 + 4, "(\") \\o/ <&>");
130
131        caca_set_attr(cv, CACA_BOLD);
132        caca_put_str(cv, WIDTH / 2 - 16, HEIGHT / 2 + 3, "Bold");
133        caca_set_attr(cv, CACA_BLINK);
134        caca_put_str(cv, WIDTH / 2 - 9, HEIGHT / 2 + 3, "Blink");
135        caca_set_attr(cv, CACA_ITALICS);
136        caca_put_str(cv, WIDTH / 2 - 1, HEIGHT / 2 + 3, "Italics");
137        caca_set_attr(cv, CACA_UNDERLINE);
138        caca_put_str(cv, WIDTH / 2 + 8, HEIGHT / 2 + 3, "Underline");
139        caca_set_attr(cv, 0);
140
141        caca_set_color_ansi(cv, CACA_WHITE, CACA_LIGHTBLUE);
142        caca_put_str(cv, WIDTH / 2 - 7, HEIGHT / 2, "    LIBCACA    ");
143
144        for(x = 0; x < 16; x++)
145        {
146            caca_set_color_argb(cv, 0xff00 | x, 0xf00f | (x << 4));
147            caca_put_char(cv, WIDTH / 2 - 7 + x, HEIGHT / 2 + 6, '#');
148        }
149    }
150
151    buffer = caca_export_canvas_to_memory(cv, format, &len);
152    fwrite(buffer, len, 1, stdout);
153    free(buffer);
154
155    caca_free_canvas(cv);
156
157    return 0;
158}
159
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