diff options
Diffstat (limited to 'distrib/sdl-1.2.12/src/joystick/riscos/SDL_sysjoystick.c')
| -rw-r--r-- | distrib/sdl-1.2.12/src/joystick/riscos/SDL_sysjoystick.c | 176 |
1 files changed, 0 insertions, 176 deletions
diff --git a/distrib/sdl-1.2.12/src/joystick/riscos/SDL_sysjoystick.c b/distrib/sdl-1.2.12/src/joystick/riscos/SDL_sysjoystick.c deleted file mode 100644 index ed8ac91..0000000 --- a/distrib/sdl-1.2.12/src/joystick/riscos/SDL_sysjoystick.c +++ /dev/null @@ -1,176 +0,0 @@ -/* - 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 -*/ -#include "SDL_config.h" - -#ifdef SDL_JOYSTICK_RISCOS - -/* - RISC OS - Joystick support by Alan Buckley (alan_baa@hotmail.com) - 10 April 2003 - - Note: Currently assumes joystick is present if joystick module is loaded - and that there is one joystick with four buttons. -*/ - -/* This is the system specific header for the SDL joystick API */ - -#include "SDL_events.h" -#include "SDL_joystick.h" -#include "../SDL_sysjoystick.h" -#include "../SDL_joystick_c.h" - -#include "kernel.h" - -#define JOYSTICK_READ 0x43F40 - -struct joystick_hwdata -{ - int joystate; -}; - - -/* Function to scan the system for joysticks. - * This function should set SDL_numjoysticks to the number of available - * joysticks. Joystick 0 should be the system default joystick. - * It should return number of joysticks, or -1 on an unrecoverable fatal error. - */ -int SDL_SYS_JoystickInit(void) -{ - _kernel_swi_regs regs; - - /* Try to read joystick 0 */ - regs.r[0] = 0; - if (_kernel_swi(JOYSTICK_READ, ®s, ®s) == NULL) - { - /* Switch works so assume we've got a joystick */ - return 1; - } - /* Switch fails so it looks like there's no joystick here */ - - return(0); -} - -/* Function to get the device-dependent name of a joystick */ -const char *SDL_SYS_JoystickName(int index) -{ - if (index == 0) - { - return "RISC OS Joystick 0"; - } - - SDL_SetError("No joystick available with that index"); - return(NULL); -} - -/* Function to open a joystick for use. - The joystick to open is specified by the index field of the joystick. - This should fill the nbuttons and naxes fields of the joystick structure. - It returns 0, or -1 if there is an error. - */ -int SDL_SYS_JoystickOpen(SDL_Joystick *joystick) -{ - _kernel_swi_regs regs; - - if(!(joystick->hwdata=SDL_malloc(sizeof(struct joystick_hwdata)))) - return -1; - - regs.r[0] = joystick->index; - - /* Don't know how to get exact count of buttons so assume max of 4 for now */ - joystick->nbuttons=4; - - joystick->nhats=0; - joystick->nballs=0; - joystick->naxes=2; - joystick->hwdata->joystate=0; - - return 0; - -} - -/* Function to update the state of a joystick - called as a device poll. - * This function shouldn't update the joystick structure directly, - * but instead should call SDL_PrivateJoystick*() to deliver events - * and update joystick device state. - */ -void SDL_SYS_JoystickUpdate(SDL_Joystick *joystick) -{ - _kernel_swi_regs regs; - regs.r[0] = joystick->index; - - if (_kernel_swi(JOYSTICK_READ, ®s, ®s) == NULL) - { - int newstate = regs.r[0]; - int oldstate = joystick->hwdata->joystate; - if (newstate != oldstate) - { - if ((newstate & 0xFF) != (oldstate & 0xFF)) - { - int y = regs.r[0] & 0xFF; - /* Convert to signed values */ - if (y >= 128) y -= 256; - SDL_PrivateJoystickAxis(joystick,1,-y * 256); /* Up and down opposite to result in SDL */ - } - if ((newstate & 0xFF00) != (oldstate & 0xFF00)) - { - int x = (regs.r[0] & 0xFF00) >> 8; - if (x >= 128) x -= 256; - SDL_PrivateJoystickAxis(joystick,0,x * 256); - } - - if ((newstate & 0xFF0000) != (oldstate & 0xFF0000)) - { - int buttons = (regs.r[0] & 0xFF0000) >> 16; - int oldbuttons = (oldstate & 0xFF0000) >> 16; - int i; - for (i = 0; i < joystick->nbuttons; i++) - { - if ((buttons & (1<<i)) != (oldbuttons & (1<<i))) - { - if (buttons & (1<<i)) SDL_PrivateJoystickButton(joystick,i,SDL_PRESSED); - else SDL_PrivateJoystickButton(joystick,i,SDL_RELEASED); - } - } - } - joystick->hwdata->joystate = newstate; - } - } - - return; -} - -/* Function to close a joystick after use */ -void SDL_SYS_JoystickClose(SDL_Joystick *joystick) -{ - if(joystick->hwdata) - SDL_free(joystick->hwdata); - return; -} - -/* Function to perform any system-specific joystick related cleanup */ -void SDL_SYS_JoystickQuit(void) -{ - SDL_numjoysticks=0; - - return; -} - -#endif /* SDL_JOYSTICK_RISCOS */ |