/* * libcaca ASCII-Art library * Copyright (c) 2002-2006 Sam Hocevar * All Rights Reserved * * This library is free software; 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. */ /** \file caca.h * \version \$Id$ * \author Sam Hocevar * \brief The \e libcaca public header. * * This header contains the public types and functions that applications * using \e libcaca may use. */ /** \mainpage libcaca developer documentation * * \section intro Introduction * * \e libcaca is a graphics library that outputs text instead of pixels, * so that it can work on older video cards or text terminals. It is not * unlike the famous AAlib library. \e libcaca can use almost any virtual * terminal to work, thus it should work on all Unix systems (including * Mac OS X) using either the slang library or the ncurses library, on DOS * using the conio library, and on Windows systems using either slang or * ncurses (through Cygwin emulation) or conio. There is also a native X11 * driver, and an OpenGL driver (through freeglut) that does not require a * text terminal. For machines without a screen, and with a valid tcp stack, * the network driver (BSD sockets) should perfectly fit your needs. * * \e libcaca is free software, released under the Do What The Fuck You * Want To Public License. This ensures that no one, not even the \e libcaca * developers, will ever have anything to say about what you do with the * software. It used to be licensed under the GNU Lesser General Public * License, but that was not free enough. * * \section api The libcaca API * * \e libcaca relies on a low-level, device independent library, called * \e libcucul. \e libcucul can be used alone as a simple ASCII and/or * Unicode compositing canvas. * * The complete \e libcucul and \e libcaca programming interface is * available from the cucul.h and caca.h headers. * * \section env Environment variables * * Some environment variables can be used to change the behaviour of * \e libcaca or \e libcucul without having to modify the program which * uses them. These variables are: * * \li \b CACA_DRIVER: set the backend video driver. In order of preference: * - \c conio uses the DOS conio.h interface. * - \c ncurses uses the ncurses library. * - \c slang uses the S-Lang library. * - \c x11 uses the native X11 driver. * - \c gl uses freeglut and opengl libraries. * - \c network uses BSD sockets calls. * * \li \b CUCUL_BACKGROUND: set the background type. * - \c solid uses solid coloured backgrounds for all characters. This * feature does not work with all terminal emulators. This is the * default choice. * - \c black uses only black backgrounds to render characters. * * \li \b CUCUL_ANTIALIASING: set the antialiasing mode. Antialiasing * smoothens the rendered image and avoids the commonly seen staircase * effect. * - \c none disables antialiasing. * - \c prefilter uses a simple prefilter antialiasing method. This is * the default choice. * * \li \b CUCUL_DITHERING: set the dithering mode. Dithering is necessary * when rendering a picture that has more colours than the usually * available palette. * - \c none disables dithering. * - \c ordered2 uses a 2x2 Bayer matrix for dithering. * - \c ordered4 uses a 4x4 Bayer matrix for dithering. This is the * default choice. * - \c ordered8 uses a 8x8 Bayer matrix for dithering. * - \c random uses random dithering. * * \li \b CACA_GEOMETRY: set the video display size. The format of this * variable must be XxY, with X and Y being integer values. This option * currently only works with the X11 and the GL driver. * * \li \b CACA_FONT: set the rendered font. The format of this variable is * implementation dependent, but since it currently only works with the * X11 driver, an X11 font name such as "fixed" or "5x7" is expected. * * \li \b CACA_NETWORK_PORT: set the port the network driver will listen on. * Obviously only works when using CACA_DRIVER=network. * Default to 7575 (KK in ASCII Dec) */ #ifndef __CACA_H__ #define __CACA_H__ #include #ifdef __cplusplus extern "C" { #endif /** \brief User events. * * Event types returned by caca_get_event(). */ enum caca_event { CACA_EVENT_NONE = 0x00000000, /**< No event. */ CACA_EVENT_KEY_PRESS = 0x01000000, /**< A key was pressed. */ CACA_EVENT_KEY_RELEASE = 0x02000000, /**< A key was released. */ CACA_EVENT_MOUSE_PRESS = 0x04000000, /**< A mouse button was pressed. */ CACA_EVENT_MOUSE_RELEASE = 0x08000000, /**< A mouse button was released. */ CACA_EVENT_MOUSE_MOTION = 0x10000000, /**< The mouse was moved. */ CACA_EVENT_RESIZE = 0x20000000, /**< The window was resized. */ CACA_EVENT_ANY = 0xff000000 /**< Bitmask for any event. */ }; /** \brief Special key values. * * Special key values returned by caca_get_event() for which there is no * ASCII equivalent. */ enum caca_key { CACA_KEY_UNKNOWN = 0, /**< Unknown key. */ /* The following keys have ASCII equivalents */ CACA_KEY_BACKSPACE = 8, /**< The backspace key. */ CACA_KEY_TAB = 9, /**< The tabulation key. */ CACA_KEY_RETURN = 13, /**< The return key. */ CACA_KEY_PAUSE = 19, /**< The pause key. */ CACA_KEY_ESCAPE = 27, /**< The escape key. */ CACA_KEY_DELETE = 127, /**< The delete key. */ /* The following keys do not have ASCII equivalents but have been * chosen to match the SDL equivalents */ CACA_KEY_UP = 273, /**< The up arrow key. */ CACA_KEY_DOWN = 274, /**< The down arrow key. */ CACA_KEY_LEFT = 275, /**< The left arrow key. */ CACA_KEY_RIGHT = 276, /**< The right arrow key. */ CACA_KEY_INSERT = 277, /**< The insert key. */ CACA_KEY_HOME = 278, /**< The home key. */ CACA_KEY_END = 279, /**< The end key. */ CACA_KEY_PAGEUP = 280, /**< The page up key. */ CACA_KEY_PAGEDOWN = 281, /**< The page down key. */ CACA_KEY_F1 = 282, /**< The F1 key. */ CACA_KEY_F2 = 283, /**< The F2 key. */ CACA_KEY_F3 = 284, /**< The F3 key. */ CACA_KEY_F4 = 285, /**< The F4 key. */ CACA_KEY_F5 = 286, /**< The F5 key. */ CACA_KEY_F6 = 287, /**< The F6 key. */ CACA_KEY_F7 = 288, /**< The F7 key. */ CACA_KEY_F8 = 289, /**< The F8 key. */ CACA_KEY_F9 = 290, /**< The F9 key. */ CACA_KEY_F10 = 291, /**< The F10 key. */ CACA_KEY_F11 = 292, /**< The F11 key. */ CACA_KEY_F12 = 293, /**< The F12 key. */ CACA_KEY_F13 = 294, /**< The F13 key. */ CACA_KEY_F14 = 295, /**< The F14 key. */ CACA_KEY_F15 = 296 /**< The F15 key. */ }; typedef struct caca_context caca_t; /** \defgroup basic Basic functions * * These functions provide the basic \e libcaca routines for library * initialisation, system information retrieval and configuration. * * @{ */ caca_t * caca_attach(cucul_t *qq); void caca_detach(caca_t *kk); void caca_set_delay(caca_t *kk, unsigned int); void caca_display(caca_t *kk); unsigned int caca_get_rendertime(caca_t *kk); unsigned int caca_get_window_width(caca_t *kk); unsigned int caca_get_window_height(caca_t *kk); int caca_set_window_title(caca_t *kk, char const *); /* @} */ /** \defgroup event Event handling * * These functions handle user events such as keyboard input and mouse * clicks. * * @{ */ unsigned int caca_get_event(caca_t *kk, unsigned int); unsigned int caca_wait_event(caca_t *kk, unsigned int); unsigned int caca_get_mouse_x(caca_t *kk); unsigned int caca_get_mouse_y(caca_t *kk); /* @} */ #ifdef __cplusplus } #endif #endif /* __CACA_H__ */