source: libcaca/trunk/caca/caca.h @ 811

Last change on this file since 811 was 811, checked in by Sam Hocevar, 14 years ago
  • Renamed caca_t into caca_display_t.
  • Renamed canvas handle variables from "c" to "cv". Eh ouais mon gros.
  • Property svn:keywords set to Id
File size: 8.7 KB
Line 
1/*
2 *  libcaca       Colour ASCII-Art library
3 *  Copyright (c) 2002-2006 Sam Hocevar <sam@zoy.org>
4 *                All Rights Reserved
5 *
6 *  $Id: caca.h 811 2006-04-18 15:11:25Z sam $
7 *
8 *  This library is free software; you can redistribute it and/or
9 *  modify it under the terms of the Do What The Fuck You Want To
10 *  Public License, Version 2, as published by Sam Hocevar. See
11 *  http://sam.zoy.org/wtfpl/COPYING for more details.
12 */
13
14/** \file caca.h
15 *  \version \$Id: caca.h 811 2006-04-18 15:11:25Z sam $
16 *  \author Sam Hocevar <sam@zoy.org>
17 *  \brief The \e libcaca public header.
18 *
19 *  This header contains the public types and functions that applications
20 *  using \e libcaca may use.
21 */
22
23/** \mainpage libcaca developer documentation
24 *
25 *  \section intro Introduction
26 *
27 *  \e libcaca is a graphics library that outputs text instead of pixels,
28 *  so that it can work on older video cards or text terminals. It is not
29 *  unlike the famous AAlib library. \e libcaca can use almost any virtual
30 *  terminal to work, thus it should work on all Unix systems (including
31 *  Mac OS X) using either the slang library or the ncurses library, on DOS
32 *  using the conio library, and on Windows systems using either slang or
33 *  ncurses (through Cygwin emulation) or conio. There is also a native X11
34 *  driver, and an OpenGL driver (through freeglut) that does not require a
35 *  text terminal. For machines without a screen, the raw driver can be used
36 *  to send the output to another machine, using for instance cacaserver.
37 *
38 *  \e libcaca is free software, released under the Do What The Fuck You
39 *  Want To Public License. This ensures that no one, not even the \e libcaca
40 *  developers, will ever have anything to say about what you do with the
41 *  software. It used to be licensed under the GNU Lesser General Public
42 *  License, but that was not free enough.
43 *
44 *  \section api The libcaca API
45 *
46 *  \e libcaca relies on a low-level, device independent library, called
47 *  \e libcucul. \e libcucul can be used alone as a simple ASCII and/or
48 *  Unicode compositing canvas.
49 *
50 *  The complete \e libcucul and \e libcaca programming interface is
51 *  available from the cucul.h and caca.h headers.
52 *
53 *  \section env Environment variables
54 *
55 *  Some environment variables can be used to change the behaviour of
56 *  \e libcaca without having to modify the program which uses them. These
57 *  variables are:
58 *
59 *  \li \b CACA_DRIVER: set the backend video driver. In order of preference:
60 *      - \c conio uses the DOS conio.h interface.
61 *      - \c ncurses uses the ncurses library.
62 *      - \c slang uses the S-Lang library.
63 *      - \c x11 uses the native X11 driver.
64 *      - \c gl uses freeglut and opengl libraries.
65 *      - \c raw outputs to the standard output instead of rendering the
66 *        canvas. This is can be used together with cacaserver.
67 *
68 *  \li \b CACA_GEOMETRY: set the video display size. The format of this
69 *      variable must be XxY, with X and Y being integer values. This option
70 *      currently works with the network, X11 and GL drivers.
71 *
72 *  \li \b CACA_FONT: set the rendered font. The format of this variable is
73 *      implementation dependent, but since it currently only works with the
74 *      X11 driver, an X11 font name such as "fixed" or "5x7" is expected.
75 */
76
77#ifndef __CACA_H__
78#define __CACA_H__
79
80/** libcaca API version */
81#define CACA_API_VERSION_1
82
83#include <cucul.h>
84
85#ifdef __cplusplus
86extern "C"
87{
88#endif
89
90/** \e libcaca context */
91typedef struct caca_display caca_display_t;
92/** event structure */
93typedef struct caca_event caca_event_t;
94
95/** \brief User events.
96 *
97 *  This structure is filled by caca_get_event() when an event is received.
98 *  The \e type field is always valid. The validity of the \e data union
99 *  depends on the value of the \e type field:
100 *
101 *  \li \b CACA_EVENT_NONE: no other field is valid.
102 *
103 *  \li \b CACA_EVENT_KEY_PRESS, \b CACA_EVENT_KEY_RELEASE: the \e data.key.ch
104 *      field is valid and contains either the ASCII value for the key, or
105 *      an \e enum \e caca_key value. If the value is a printable ASCII
106 *      character, the \e data.key.ucs4 and \e data.key.utf8 fields are
107 *      also filled and contain respectively the UCS-4/UTF-32 and the UTF-8
108 *      representations of the character. Otherwise, their content is
109 *      undefined.
110 *
111 *  \li \b CACA_EVENT_MOUSE_PRESS, \b CACA_EVENT_MOUSE_RELEASE: the
112 *      \e data.mouse.button field is valid and contains the index of the
113 *      mouse button that was pressed.
114 *
115 *  \li \b CACA_EVENT_MOUSE_MOTION: the \e data.mouse.x and \e data.mouse.y
116 *      fields are valid and contain the mouse coordinates in character
117 *      cells.
118 *
119 *  \li \b CACA_EVENT_RESIZE: the \e data.resize.w and \e data.resize.h
120 *      fields are valid and contain the new width and height values of
121 *      the \e libcucul canvas attached to \e libcaca.
122 *
123 *  \li \b CACA_EVENT_QUIT: no other field is valid.
124 *
125 *  The result of accessing data members outside the above conditions is
126 *  undefined.
127 */
128struct caca_event
129{
130    enum caca_event_type
131    {
132        CACA_EVENT_NONE =          0x0000, /**< No event. */
133
134        CACA_EVENT_KEY_PRESS =     0x0001, /**< A key was pressed. */
135        CACA_EVENT_KEY_RELEASE =   0x0002, /**< A key was released. */
136        CACA_EVENT_MOUSE_PRESS =   0x0004, /**< A mouse button was pressed. */
137        CACA_EVENT_MOUSE_RELEASE = 0x0008, /**< A mouse button was released. */
138        CACA_EVENT_MOUSE_MOTION =  0x0010, /**< The mouse was moved. */
139        CACA_EVENT_RESIZE =        0x0020, /**< The window was resized. */
140        CACA_EVENT_QUIT =          0x0040, /**< The user requested to quit. */
141
142        CACA_EVENT_ANY =           0xffff  /**< Bitmask for any event. */
143    } type;
144
145    union
146    {
147        struct { unsigned int x, y, button; } mouse;
148        struct { unsigned int w, h; } resize;
149        struct { unsigned int ch; unsigned long int ucs4; char utf8[8]; } key;
150    } data;
151};
152
153/** \brief Special key values.
154 *
155 *  Special key values returned by caca_get_event() for which there is no
156 *  ASCII equivalent.
157 */
158enum caca_key
159{
160    CACA_KEY_UNKNOWN = 0x00, /**< Unknown key. */
161
162    /* The following keys have ASCII equivalents */
163    CACA_KEY_BACKSPACE = 0x08, /**< The backspace key. */
164    CACA_KEY_TAB =       0x09, /**< The tabulation key. */
165    CACA_KEY_RETURN =    0x0d, /**< The return key. */
166    CACA_KEY_PAUSE =     0x13, /**< The pause key. */
167    CACA_KEY_ESCAPE =    0x1b, /**< The escape key. */
168    CACA_KEY_DELETE =    0x7f, /**< The delete key. */
169
170    /* The following keys do not have ASCII equivalents but have been
171     * chosen to match the SDL equivalents */
172    CACA_KEY_UP =    0x111, /**< The up arrow key. */
173    CACA_KEY_DOWN =  0x112, /**< The down arrow key. */
174    CACA_KEY_LEFT =  0x113, /**< The left arrow key. */
175    CACA_KEY_RIGHT = 0x114, /**< The right arrow key. */
176
177    CACA_KEY_INSERT =   0x115, /**< The insert key. */
178    CACA_KEY_HOME =     0x116, /**< The home key. */
179    CACA_KEY_END =      0x117, /**< The end key. */
180    CACA_KEY_PAGEUP =   0x118, /**< The page up key. */
181    CACA_KEY_PAGEDOWN = 0x119, /**< The page down key. */
182
183    CACA_KEY_F1 =  0x11a, /**< The F1 key. */
184    CACA_KEY_F2 =  0x11b, /**< The F2 key. */
185    CACA_KEY_F3 =  0x11c, /**< The F3 key. */
186    CACA_KEY_F4 =  0x11d, /**< The F4 key. */
187    CACA_KEY_F5 =  0x11e, /**< The F5 key. */
188    CACA_KEY_F6 =  0x11f, /**< The F6 key. */
189    CACA_KEY_F7 =  0x120, /**< The F7 key. */
190    CACA_KEY_F8 =  0x121, /**< The F8 key. */
191    CACA_KEY_F9 =  0x122, /**< The F9 key. */
192    CACA_KEY_F10 = 0x123, /**< The F10 key. */
193    CACA_KEY_F11 = 0x124, /**< The F11 key. */
194    CACA_KEY_F12 = 0x125, /**< The F12 key. */
195    CACA_KEY_F13 = 0x126, /**< The F13 key. */
196    CACA_KEY_F14 = 0x127, /**< The F14 key. */
197    CACA_KEY_F15 = 0x128  /**< The F15 key. */
198};
199
200/** \defgroup caca Basic libcaca functions
201 *
202 *  These functions provide the basic \e libcaca routines for driver
203 *  initialisation, system information retrieval and configuration.
204 *
205 *  @{ */
206caca_display_t * caca_attach(cucul_canvas_t *);
207void caca_detach(caca_display_t *);
208void caca_set_delay(caca_display_t *, unsigned int);
209void caca_display(caca_display_t *);
210unsigned int caca_get_rendertime(caca_display_t *);
211unsigned int caca_get_window_width(caca_display_t *);
212unsigned int caca_get_window_height(caca_display_t *);
213int caca_set_window_title(caca_display_t *, char const *);
214/*  @} */
215
216/** \defgroup event Event handling
217 *
218 *  These functions handle user events such as keyboard input and mouse
219 *  clicks.
220 *
221 *  @{ */
222int caca_get_event(caca_display_t *, unsigned int, caca_event_t *, int);
223unsigned int caca_get_mouse_x(caca_display_t *);
224unsigned int caca_get_mouse_y(caca_display_t *);
225void caca_set_mouse(caca_display_t *, int);
226/*  @} */
227
228#ifdef __cplusplus
229}
230#endif
231
232#endif /* __CACA_H__ */
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