source: libcaca/trunk/caca/driver/raw.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 *  libcaca       Colour ASCII-Art library
3 *  Copyright (c) 2002-2009 Sam Hocevar <sam@hocevar.net>
4 *                All Rights Reserved
5 *
6 *  $Id: raw.c 3495 2009-05-21 20:55:21Z sam $
7 *
8 *  This library 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/*
16 *  This file contains the libcaca raw input and output driver
17 */
18
19#include "config.h"
20
21#if !defined(__KERNEL__)
22
23#include <stdio.h>
24#include <stdlib.h>
25
26#include "caca.h"
27#include "caca_internals.h"
28
29static int raw_init_graphics(caca_display_t *dp)
30{
31    int width = caca_get_canvas_width(dp->cv);
32    int height = caca_get_canvas_height(dp->cv);
33    char const *geometry;
34
35#if defined(HAVE_GETENV)
36    geometry = getenv("CACA_GEOMETRY");
37    if(geometry && *geometry)
38        sscanf(geometry, "%ux%u", &width, &height);
39#endif
40
41    dp->resize.allow = 1;
42    caca_set_canvas_size(dp->cv, width ? width : 80, height ? height : 24);
43    dp->resize.allow = 0;
44
45    return 0;
46}
47
48static int raw_end_graphics(caca_display_t *dp)
49{
50    return 0;
51}
52
53static int raw_set_display_title(caca_display_t *dp, char const *title)
54{
55    return -1;
56}
57
58static int raw_get_display_width(caca_display_t const *dp)
59{
60    return 0;
61}
62
63static int raw_get_display_height(caca_display_t const *dp)
64{
65    return 0;
66}
67
68static void raw_display(caca_display_t *dp)
69{
70    void *buffer;
71    size_t len;
72
73    buffer = caca_export_canvas_to_memory(dp->cv, "caca", &len);
74    if(!buffer)
75        return;
76    fwrite(buffer, len, 1, stdout);
77    fflush(stdout);
78    free(buffer);
79}
80
81static void raw_handle_resize(caca_display_t *dp)
82{
83    ;
84}
85
86static int raw_get_event(caca_display_t *dp, caca_privevent_t *ev)
87{
88    ev->type = CACA_EVENT_NONE;
89    return 0;
90}
91
92/*
93 * Driver initialisation
94 */
95
96int raw_install(caca_display_t *dp)
97{
98    dp->drv.id = CACA_DRIVER_RAW;
99    dp->drv.driver = "raw";
100
101    dp->drv.init_graphics = raw_init_graphics;
102    dp->drv.end_graphics = raw_end_graphics;
103    dp->drv.set_display_title = raw_set_display_title;
104    dp->drv.get_display_width = raw_get_display_width;
105    dp->drv.get_display_height = raw_get_display_height;
106    dp->drv.display = raw_display;
107    dp->drv.handle_resize = raw_handle_resize;
108    dp->drv.get_event = raw_get_event;
109    dp->drv.set_mouse = NULL;
110    dp->drv.set_cursor = NULL;
111
112    return 0;
113}
114
115#endif /* !__KERNEL__ */
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