Initial revision
--HG-- extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%401
This commit is contained in:
Sam Lantinga
commit
2f110628a7
892 changed files with 170313 additions and 0 deletions
582
src/joystick/SDL_joystick.c
Normal file
582
src/joystick/SDL_joystick.c
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@ -0,0 +1,582 @@
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/*
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SDL - Simple DirectMedia Layer
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Copyright (C) 1997, 1998, 1999, 2000, 2001 Sam Lantinga
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with this library; if not, write to the Free
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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Sam Lantinga
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slouken@devolution.com
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*/
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#ifdef SAVE_RCSID
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static char rcsid =
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"@(#) $Id$";
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#endif
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/* This is the joystick API for Simple DirectMedia Layer */
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "SDL_error.h"
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#include "SDL_events.h"
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#ifndef DISABLE_EVENTS
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#include "SDL_events_c.h"
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#endif
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#include "SDL_joystick_c.h"
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#include "SDL_sysjoystick.h"
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/* This is used for Quake III Arena */
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#ifdef DISABLE_EVENTS
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#define SDL_Lock_EventThread()
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#define SDL_Unlock_EventThread()
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#endif
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Uint8 SDL_numjoysticks = 0;
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SDL_Joystick **SDL_joysticks = NULL;
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static SDL_Joystick *default_joystick = NULL;
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int SDL_JoystickInit(void)
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{
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int arraylen;
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int status;
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SDL_numjoysticks = 0;
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status = SDL_SYS_JoystickInit();
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if ( status >= 0 ) {
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arraylen = (status+1)*sizeof(*SDL_joysticks);
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SDL_joysticks = (SDL_Joystick **)malloc(arraylen);
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if ( SDL_joysticks == NULL ) {
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SDL_numjoysticks = 0;
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} else {
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memset(SDL_joysticks, 0, arraylen);
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}
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SDL_numjoysticks = status;
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status = 0;
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}
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default_joystick = NULL;
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return(status);
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}
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/*
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* Count the number of joysticks attached to the system
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*/
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int SDL_NumJoysticks(void)
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{
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return SDL_numjoysticks;
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}
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/*
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* Get the implementation dependent name of a joystick
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*/
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const char *SDL_JoystickName(int device_index)
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{
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if ( (device_index < 0) || (device_index >= SDL_numjoysticks) ) {
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SDL_SetError("There are %d joysticks available",
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SDL_numjoysticks);
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return(NULL);
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}
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return(SDL_SYS_JoystickName(device_index));
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}
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/*
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* Open a joystick for use - the index passed as an argument refers to
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* the N'th joystick on the system. This index is the value which will
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* identify this joystick in future joystick events.
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*
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* This function returns a joystick identifier, or NULL if an error occurred.
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*/
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SDL_Joystick *SDL_JoystickOpen(int device_index)
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{
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int i;
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SDL_Joystick *joystick;
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if ( (device_index < 0) || (device_index >= SDL_numjoysticks) ) {
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SDL_SetError("There are %d joysticks available",
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SDL_numjoysticks);
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return(NULL);
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}
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/* If the joystick is already open, return it */
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for ( i=0; SDL_joysticks[i]; ++i ) {
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if ( device_index == SDL_joysticks[i]->index ) {
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joystick = SDL_joysticks[i];
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++joystick->ref_count;
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return(joystick);
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}
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}
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/* Create and initialize the joystick */
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joystick = (SDL_Joystick *)malloc((sizeof *joystick));
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if ( joystick != NULL ) {
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memset(joystick, 0, (sizeof *joystick));
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joystick->index = device_index;
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if ( SDL_SYS_JoystickOpen(joystick) < 0 ) {
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free(joystick);
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joystick = NULL;
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} else {
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if ( joystick->naxes > 0 ) {
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joystick->axes = (Sint16 *)malloc
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(joystick->naxes*sizeof(Sint16));
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}
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if ( joystick->nhats > 0 ) {
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joystick->hats = (Uint8 *)malloc
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(joystick->nhats*sizeof(Uint8));
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}
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if ( joystick->nballs > 0 ) {
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joystick->balls = (struct balldelta *)malloc
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(joystick->nballs*sizeof(*joystick->balls));
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}
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if ( joystick->nbuttons > 0 ) {
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joystick->buttons = (Uint8 *)malloc
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(joystick->nbuttons*sizeof(Uint8));
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}
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if ( ((joystick->naxes > 0) && !joystick->axes)
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|| ((joystick->nhats > 0) && !joystick->hats)
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|| ((joystick->nballs > 0) && !joystick->balls)
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|| ((joystick->nbuttons > 0) && !joystick->buttons)) {
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SDL_OutOfMemory();
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SDL_JoystickClose(joystick);
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joystick = NULL;
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}
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if ( joystick->axes ) {
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memset(joystick->axes, 0,
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joystick->naxes*sizeof(Sint16));
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}
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if ( joystick->hats ) {
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memset(joystick->hats, 0,
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joystick->nhats*sizeof(Uint8));
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}
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if ( joystick->balls ) {
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memset(joystick->balls, 0,
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joystick->nballs*sizeof(*joystick->balls));
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}
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if ( joystick->buttons ) {
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memset(joystick->buttons, 0,
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joystick->nbuttons*sizeof(Uint8));
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}
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}
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}
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if ( joystick ) {
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/* Add joystick to list */
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++joystick->ref_count;
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SDL_Lock_EventThread();
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for ( i=0; SDL_joysticks[i]; ++i )
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/* Skip to next joystick */;
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SDL_joysticks[i] = joystick;
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SDL_Unlock_EventThread();
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}
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return(joystick);
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}
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/*
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* Returns 1 if the joystick has been opened, or 0 if it has not.
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*/
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int SDL_JoystickOpened(int device_index)
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{
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int i, opened;
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opened = 0;
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for ( i=0; SDL_joysticks[i]; ++i ) {
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if ( SDL_joysticks[i]->index == (Uint8)device_index ) {
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opened = 1;
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break;
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}
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}
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return(opened);
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}
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static int ValidJoystick(SDL_Joystick **joystick)
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{
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int valid;
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if ( *joystick == NULL ) {
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*joystick = default_joystick;
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}
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if ( *joystick == NULL ) {
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SDL_SetError("Joystick hasn't been opened yet");
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valid = 0;
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} else {
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valid = 1;
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}
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return valid;
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}
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/*
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* Get the device index of an opened joystick.
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*/
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int SDL_JoystickIndex(SDL_Joystick *joystick)
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{
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if ( ! ValidJoystick(&joystick) ) {
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return(-1);
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}
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return(joystick->index);
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}
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/*
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* Get the number of multi-dimensional axis controls on a joystick
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*/
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int SDL_JoystickNumAxes(SDL_Joystick *joystick)
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{
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if ( ! ValidJoystick(&joystick) ) {
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return(-1);
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}
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return(joystick->naxes);
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}
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/*
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* Get the number of hats on a joystick
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*/
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int SDL_JoystickNumHats(SDL_Joystick *joystick)
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{
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if ( ! ValidJoystick(&joystick) ) {
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return(-1);
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}
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return(joystick->nhats);
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}
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/*
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* Get the number of trackballs on a joystick
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*/
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int SDL_JoystickNumBalls(SDL_Joystick *joystick)
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{
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if ( ! ValidJoystick(&joystick) ) {
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return(-1);
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}
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return(joystick->nballs);
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}
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/*
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* Get the number of buttons on a joystick
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*/
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int SDL_JoystickNumButtons(SDL_Joystick *joystick)
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{
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if ( ! ValidJoystick(&joystick) ) {
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return(-1);
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}
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return(joystick->nbuttons);
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}
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/*
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* Get the current state of an axis control on a joystick
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*/
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Sint16 SDL_JoystickGetAxis(SDL_Joystick *joystick, int axis)
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{
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Sint16 state;
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if ( ! ValidJoystick(&joystick) ) {
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return(0);
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}
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if ( axis < joystick->naxes ) {
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state = joystick->axes[axis];
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} else {
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SDL_SetError("Joystick only has %d axes", joystick->naxes);
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state = 0;
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}
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return(state);
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}
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/*
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* Get the current state of a hat on a joystick
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*/
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Uint8 SDL_JoystickGetHat(SDL_Joystick *joystick, int hat)
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{
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Uint8 state;
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if ( ! ValidJoystick(&joystick) ) {
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return(0);
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}
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if ( hat < joystick->nhats ) {
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state = joystick->hats[hat];
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} else {
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SDL_SetError("Joystick only has %d hats", joystick->nhats);
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state = 0;
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}
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return(state);
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}
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/*
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* Get the ball axis change since the last poll
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*/
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int SDL_JoystickGetBall(SDL_Joystick *joystick, int ball, int *dx, int *dy)
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{
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int retval;
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if ( ! ValidJoystick(&joystick) ) {
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return(-1);
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}
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retval = 0;
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if ( ball < joystick->nballs ) {
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if ( dx ) {
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*dx = joystick->balls[ball].dx;
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}
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if ( dy ) {
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*dy = joystick->balls[ball].dy;
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}
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joystick->balls[ball].dx = 0;
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joystick->balls[ball].dy = 0;
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} else {
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SDL_SetError("Joystick only has %d balls", joystick->nballs);
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retval = -1;
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}
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return(retval);
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}
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/*
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* Get the current state of a button on a joystick
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*/
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Uint8 SDL_JoystickGetButton(SDL_Joystick *joystick, int button)
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{
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Uint8 state;
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if ( ! ValidJoystick(&joystick) ) {
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return(0);
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}
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if ( button < joystick->nbuttons ) {
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state = joystick->buttons[button];
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} else {
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SDL_SetError("Joystick only has %d buttons",joystick->nbuttons);
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state = 0;
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}
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return(state);
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}
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/*
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* Close a joystick previously opened with SDL_JoystickOpen()
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*/
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void SDL_JoystickClose(SDL_Joystick *joystick)
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{
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int i;
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if ( ! ValidJoystick(&joystick) ) {
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return;
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}
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/* First decrement ref count */
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if ( --joystick->ref_count > 0 ) {
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return;
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}
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/* Lock the event queue - prevent joystick polling */
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SDL_Lock_EventThread();
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if ( joystick == default_joystick ) {
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default_joystick = NULL;
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}
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SDL_SYS_JoystickClose(joystick);
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/* Remove joystick from list */
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for ( i=0; SDL_joysticks[i]; ++i ) {
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if ( joystick == SDL_joysticks[i] ) {
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memcpy(&SDL_joysticks[i], &SDL_joysticks[i+1],
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(SDL_numjoysticks-i)*sizeof(joystick));
|
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break;
|
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}
|
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}
|
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|
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/* Let the event thread keep running */
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SDL_Unlock_EventThread();
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|
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/* Free the data associated with this joystick */
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if ( joystick->axes ) {
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free(joystick->axes);
|
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}
|
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if ( joystick->hats ) {
|
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free(joystick->hats);
|
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}
|
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if ( joystick->balls ) {
|
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free(joystick->balls);
|
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}
|
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if ( joystick->buttons ) {
|
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free(joystick->buttons);
|
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}
|
||||
free(joystick);
|
||||
}
|
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|
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void SDL_JoystickQuit(void)
|
||||
{
|
||||
/* Stop the event polling */
|
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SDL_Lock_EventThread();
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SDL_numjoysticks = 0;
|
||||
SDL_Unlock_EventThread();
|
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|
||||
/* Quit the joystick setup */
|
||||
SDL_SYS_JoystickQuit();
|
||||
if ( SDL_joysticks ) {
|
||||
free(SDL_joysticks);
|
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SDL_joysticks = NULL;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/* These are global for SDL_sysjoystick.c and SDL_events.c */
|
||||
|
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int SDL_PrivateJoystickAxis(SDL_Joystick *joystick, Uint8 axis, Sint16 value)
|
||||
{
|
||||
int posted;
|
||||
|
||||
/* Update internal joystick state */
|
||||
joystick->axes[axis] = value;
|
||||
|
||||
/* Post the event, if desired */
|
||||
posted = 0;
|
||||
#ifndef DISABLE_EVENTS
|
||||
if ( SDL_ProcessEvents[SDL_JOYAXISMOTION] == SDL_ENABLE ) {
|
||||
SDL_Event event;
|
||||
event.type = SDL_JOYAXISMOTION;
|
||||
event.jaxis.which = joystick->index;
|
||||
event.jaxis.axis = axis;
|
||||
event.jaxis.value = value;
|
||||
if ( (SDL_EventOK == NULL) || (*SDL_EventOK)(&event) ) {
|
||||
posted = 1;
|
||||
SDL_PushEvent(&event);
|
||||
}
|
||||
}
|
||||
#endif /* !DISABLE_EVENTS */
|
||||
return(posted);
|
||||
}
|
||||
|
||||
int SDL_PrivateJoystickHat(SDL_Joystick *joystick, Uint8 hat, Uint8 value)
|
||||
{
|
||||
int posted;
|
||||
|
||||
/* Update internal joystick state */
|
||||
joystick->hats[hat] = value;
|
||||
|
||||
/* Post the event, if desired */
|
||||
posted = 0;
|
||||
#ifndef DISABLE_EVENTS
|
||||
if ( SDL_ProcessEvents[SDL_JOYHATMOTION] == SDL_ENABLE ) {
|
||||
SDL_Event event;
|
||||
event.jhat.type = SDL_JOYHATMOTION;
|
||||
event.jhat.which = joystick->index;
|
||||
event.jhat.hat = hat;
|
||||
event.jhat.value = value;
|
||||
if ( (SDL_EventOK == NULL) || (*SDL_EventOK)(&event) ) {
|
||||
posted = 1;
|
||||
SDL_PushEvent(&event);
|
||||
}
|
||||
}
|
||||
#endif /* !DISABLE_EVENTS */
|
||||
return(posted);
|
||||
}
|
||||
|
||||
int SDL_PrivateJoystickBall(SDL_Joystick *joystick, Uint8 ball,
|
||||
Sint16 xrel, Sint16 yrel)
|
||||
{
|
||||
int posted;
|
||||
|
||||
/* Update internal mouse state */
|
||||
joystick->balls[ball].dx += xrel;
|
||||
joystick->balls[ball].dy += yrel;
|
||||
|
||||
/* Post the event, if desired */
|
||||
posted = 0;
|
||||
#ifndef DISABLE_EVENTS
|
||||
if ( SDL_ProcessEvents[SDL_JOYBALLMOTION] == SDL_ENABLE ) {
|
||||
SDL_Event event;
|
||||
event.jball.type = SDL_JOYBALLMOTION;
|
||||
event.jball.which = joystick->index;
|
||||
event.jball.ball = ball;
|
||||
event.jball.xrel = xrel;
|
||||
event.jball.yrel = yrel;
|
||||
if ( (SDL_EventOK == NULL) || (*SDL_EventOK)(&event) ) {
|
||||
posted = 1;
|
||||
SDL_PushEvent(&event);
|
||||
}
|
||||
}
|
||||
#endif /* !DISABLE_EVENTS */
|
||||
return(posted);
|
||||
}
|
||||
|
||||
int SDL_PrivateJoystickButton(SDL_Joystick *joystick, Uint8 button, Uint8 state)
|
||||
{
|
||||
int posted;
|
||||
#ifndef DISABLE_EVENTS
|
||||
SDL_Event event;
|
||||
|
||||
switch ( state ) {
|
||||
case SDL_PRESSED:
|
||||
event.type = SDL_JOYBUTTONDOWN;
|
||||
break;
|
||||
case SDL_RELEASED:
|
||||
event.type = SDL_JOYBUTTONUP;
|
||||
break;
|
||||
default:
|
||||
/* Invalid state -- bail */
|
||||
return(0);
|
||||
}
|
||||
#endif /* !DISABLE_EVENTS */
|
||||
|
||||
/* Update internal joystick state */
|
||||
joystick->buttons[button] = state;
|
||||
|
||||
/* Post the event, if desired */
|
||||
posted = 0;
|
||||
#ifndef DISABLE_EVENTS
|
||||
if ( SDL_ProcessEvents[event.type] == SDL_ENABLE ) {
|
||||
event.jbutton.which = joystick->index;
|
||||
event.jbutton.button = button;
|
||||
event.jbutton.state = state;
|
||||
if ( (SDL_EventOK == NULL) || (*SDL_EventOK)(&event) ) {
|
||||
posted = 1;
|
||||
SDL_PushEvent(&event);
|
||||
}
|
||||
}
|
||||
#endif /* !DISABLE_EVENTS */
|
||||
return(posted);
|
||||
}
|
||||
|
||||
void SDL_JoystickUpdate(void)
|
||||
{
|
||||
int i;
|
||||
|
||||
for ( i=0; SDL_joysticks[i]; ++i ) {
|
||||
SDL_SYS_JoystickUpdate(SDL_joysticks[i]);
|
||||
}
|
||||
}
|
||||
|
||||
int SDL_JoystickEventState(int state)
|
||||
{
|
||||
#ifdef DISABLE_EVENTS
|
||||
return SDL_IGNORE;
|
||||
#else
|
||||
const Uint8 event_list[] = {
|
||||
SDL_JOYAXISMOTION, SDL_JOYBALLMOTION, SDL_JOYHATMOTION,
|
||||
SDL_JOYBUTTONDOWN, SDL_JOYBUTTONUP,
|
||||
};
|
||||
int i;
|
||||
|
||||
switch (state) {
|
||||
case SDL_QUERY:
|
||||
state = SDL_IGNORE;
|
||||
for ( i=0; i<SDL_TABLESIZE(event_list); ++i ) {
|
||||
state = SDL_EventState(event_list[i],SDL_QUERY);
|
||||
if ( state == SDL_ENABLE ) {
|
||||
break;
|
||||
}
|
||||
}
|
||||
break;
|
||||
default:
|
||||
for ( i=0; i<SDL_TABLESIZE(event_list); ++i ) {
|
||||
SDL_EventState(event_list[i], state);
|
||||
}
|
||||
break;
|
||||
}
|
||||
return(state);
|
||||
#endif /* DISABLE_EVENTS */
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue