view include/SDL_keyboard.h @ 1982:3b4ce57c6215

First shot at new audio data types (int32 and float32). Notable changes: - Converters between types are autogenerated. Instead of making multiple passes over the data with seperate filters for endianess, size, signedness, etc, converting between data types is always one specialized filter. This simplifies SDL_BuildAudioCVT(), which otherwise had a million edge cases with the new types, and makes the actually conversions more CPU cache friendly. Left a stub for adding specific optimized versions of these routines (SSE/MMX/Altivec, assembler, etc) - Autogenerated converters are built by SDL/src/audio/sdlgenaudiocvt.pl. This does not need to be run unless tweaking the code, and thus doesn't need integration into the build system. - Went through all the drivers and tried to weed out all the "Uint16" references that are better specified with the new SDL_AudioFormat typedef. - Cleaned out a bunch of hardcoded bitwise magic numbers and replaced them with new SDL_AUDIO_* macros. - Added initial float32 and int32 support code. Theoretically, existing drivers will push these through converters to get the data they want to feed to the hardware. Still TODO: - Optimize and debug new converters. - Update the CoreAudio backend to accept float32 data directly. - Other backends, too? - SDL_LoadWAV() needs to be updated to support int32 and float32 .wav files (both of which exist and can be generated by 'sox' for testing purposes). - Update the mixer to handle new datatypes. - Optionally update SDL_sound and SDL_mixer, etc.
author Ryan C. Gordon <icculus@icculus.org>
date Thu, 24 Aug 2006 12:10:46 +0000
parents c121d94672cb
children 047245361002
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line source

/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997-2006 Sam Lantinga

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) any later version.

    This library is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

    Sam Lantinga
    slouken@libsdl.org
*/

/**
 * \file SDL_keyboard.h
 *
 * Include file for SDL keyboard event handling
 */

#ifndef _SDL_keyboard_h
#define _SDL_keyboard_h

#include "SDL_stdinc.h"
#include "SDL_error.h"
#include "SDL_keysym.h"

#include "begin_code.h"
/* Set up for C function definitions, even when using C++ */
#ifdef __cplusplus
/* *INDENT-OFF* */
extern "C" {
/* *INDENT-ON* */
#endif

/**
 * \struct SDL_keysym
 *
 * \brief The SDL keysym structure, used in key events.
 */
typedef struct SDL_keysym
{
    Uint8 scancode;             /**< keyboard specific scancode */
    Uint8 padding[3];           /**< alignment padding */
    Uint16 sym;                 /**< SDL virtual keysym */
    Uint16 mod;                 /**< current key modifiers */
    Uint32 unicode;             /**< OBSOLETE, use SDL_TextInputEvent instead */
} SDL_keysym;

/* Function prototypes */

/**
 * \fn int SDL_GetNumKeyboards(void)
 *
 * \brief Get the number of keyboard input devices available.
 *
 * \sa SDL_SelectKeyboard()
 */
extern DECLSPEC int SDLCALL SDL_GetNumKeyboards(void);

/**
 * \fn int SDL_SelectKeyboard(int index)
 *
 * \brief Set the index of the currently selected keyboard.
 *
 * \return The index of the previously selected keyboard.
 *
 * \note You can query the currently selected keyboard by passing an index of -1.
 *
 * \sa SDL_GetNumKeyboards()
 */
extern DECLSPEC int SDLCALL SDL_SelectKeyboard(int index);

/**
 * \fn int SDL_EnableUNICODE(int enable)
 *
 * \brief Enable/Disable UNICODE translation of keyboard input.
 *
 * \param enable 1 to enable translation, 0 to disable translation, -1 to query translation
 *
 * \return The previous state of keyboard translation
 *
 * \note This translation has some overhead, so translation defaults off.
 */
extern DECLSPEC int SDLCALL SDL_EnableUNICODE(int enable);

/**
 * \fn int SDL_EnableKeyRepeat(int delay, int interval)
 * 
 * \brief Enable keyboard repeat for the selected keyboard.
 *
 * \param delay The initial delay in milliseconds between the time when a
 *              key is pressed and keyboard repeat begins.  Setting a delay
 *              of 0 will disable keyboard repeat.
 * \param interval The time in milliseconds between keyboard repeat events.
 *
 * \return 0 on success, or -1 if there was an error.
 *
 * \note Keyboard repeat defaults to off.
 */
#define SDL_DEFAULT_REPEAT_DELAY	500
#define SDL_DEFAULT_REPEAT_INTERVAL	30
 /**/
    extern DECLSPEC int SDLCALL SDL_EnableKeyRepeat(int delay, int interval);

/**
 * \fn void SDL_GetKeyRepeat(int *delay, int *interval)
 *
 * \brief Get the current keyboard repeat setting for the selected keyboard.
 */
extern DECLSPEC void SDLCALL SDL_GetKeyRepeat(int *delay, int *interval);

/**
 * \fn Uint8 *SDL_GetKeyState(int *numkeys)
 *
 * \brief Get a snapshot of the current state of the selected keyboard.
 *
 * \return An array of keystates, indexed by the SDLK_* syms.
 *
 * Example:
 * 	Uint8 *keystate = SDL_GetKeyState(NULL);
 *	if ( keystate[SDLK_RETURN] ) ... <RETURN> is pressed.
 */
extern DECLSPEC Uint8 *SDLCALL SDL_GetKeyState(int *numkeys);

/**
 * \fn SDLMod SDL_GetModState(void)
 *
 * \brief Get the current key modifier state for the selected keyboard.
 */
extern DECLSPEC SDLMod SDLCALL SDL_GetModState(void);

/**
 * \fn void SDL_SetModState(SDLMod modstate)
 *
 * \brief Set the current key modifier state for the selected keyboard.
 *
 * \note This does not change the keyboard state, only the key modifier flags.
 */
extern DECLSPEC void SDLCALL SDL_SetModState(SDLMod modstate);

/**
 * \fn const char *SDL_GetKeyName(SDLKey key)
 * 
 * \brief Get the name of an SDL virtual keysym
 */
extern DECLSPEC const char *SDLCALL SDL_GetKeyName(SDLKey key);


/* Ends C function definitions when using C++ */
#ifdef __cplusplus
/* *INDENT-OFF* */
}
/* *INDENT-ON* */
#endif
#include "close_code.h"

#endif /* _SDL_keyboard_h */

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