| /* |
| SDL - Simple DirectMedia Layer |
| Copyright (C) 1997-2012 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_DC |
| |
| #include "SDL_events.h" |
| #include "SDL_joystick.h" |
| #include "../SDL_sysjoystick.h" |
| #include "../SDL_joystick_c.h" |
| |
| #include <dc/maple.h> |
| #include <dc/maple/controller.h> |
| |
| #define MAX_JOYSTICKS 8 /* only 2 are supported in the multimedia API */ |
| #define MAX_AXES 6 /* each joystick can have up to 6 axes */ |
| #define MAX_BUTTONS 8 /* and 8 buttons */ |
| #define MAX_HATS 2 |
| |
| #define JOYNAMELEN 8 |
| |
| /* array to hold joystick ID values */ |
| static uint8 SYS_Joystick_addr[MAX_JOYSTICKS]; |
| |
| /* The private structure used to keep track of a joystick */ |
| struct joystick_hwdata |
| { |
| cont_cond_t prev_cond; |
| int prev_buttons; |
| }; |
| |
| /* 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 0, or -1 on an unrecoverable fatal error. |
| */ |
| int SDL_SYS_JoystickInit(void) |
| { |
| int numdevs; |
| |
| int p,u; |
| |
| numdevs = 0; |
| for(p=0;p<MAPLE_PORT_COUNT;p++) { |
| for(u=0;u<MAPLE_UNIT_COUNT;u++) { |
| if (maple_device_func(p,u)&MAPLE_FUNC_CONTROLLER) { |
| SYS_Joystick_addr[numdevs] = maple_addr(p,u); |
| numdevs++; |
| } |
| } |
| } |
| |
| return(numdevs); |
| } |
| |
| /* Function to get the device-dependent name of a joystick */ |
| const char *SDL_SYS_JoystickName(int index) |
| { |
| maple_device_t *dev; |
| if (maple_compat_resolve(SYS_Joystick_addr[index],&dev,MAPLE_FUNC_CONTROLLER)!=0) return NULL; |
| return dev->info.product_name; |
| } |
| |
| /* 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) |
| { |
| /* allocate memory for system specific hardware data */ |
| joystick->hwdata = (struct joystick_hwdata *) SDL_malloc(sizeof(*joystick->hwdata)); |
| if (joystick->hwdata == NULL) |
| { |
| SDL_OutOfMemory(); |
| return(-1); |
| } |
| SDL_memset(joystick->hwdata, 0, sizeof(*joystick->hwdata)); |
| |
| /* fill nbuttons, naxes, and nhats fields */ |
| joystick->nbuttons = MAX_BUTTONS; |
| joystick->naxes = MAX_AXES; |
| joystick->nhats = MAX_HATS; |
| 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) |
| { |
| const int sdl_buttons[] = { |
| CONT_C, |
| CONT_B, |
| CONT_A, |
| CONT_START, |
| CONT_Z, |
| CONT_Y, |
| CONT_X, |
| CONT_D |
| }; |
| |
| uint8 addr; |
| cont_cond_t cond,*prev_cond; |
| int buttons,prev_buttons,i,changed; |
| |
| addr = SYS_Joystick_addr[joystick->index]; |
| if (cont_get_cond(addr,&cond)<0) return; |
| |
| buttons = cond.buttons; |
| prev_buttons = joystick->hwdata->prev_buttons; |
| changed = buttons^prev_buttons; |
| |
| if ((changed)&(CONT_DPAD_UP|CONT_DPAD_DOWN|CONT_DPAD_LEFT|CONT_DPAD_RIGHT)) { |
| int hat = SDL_HAT_CENTERED; |
| if (buttons&CONT_DPAD_UP) hat|=SDL_HAT_UP; |
| if (buttons&CONT_DPAD_DOWN) hat|=SDL_HAT_DOWN; |
| if (buttons&CONT_DPAD_LEFT) hat|=SDL_HAT_LEFT; |
| if (buttons&CONT_DPAD_RIGHT) hat|=SDL_HAT_RIGHT; |
| SDL_PrivateJoystickHat(joystick, 0, hat); |
| } |
| if ((changed)&(CONT_DPAD2_UP|CONT_DPAD2_DOWN|CONT_DPAD2_LEFT|CONT_DPAD2_RIGHT)) { |
| int hat = SDL_HAT_CENTERED; |
| if (buttons&CONT_DPAD2_UP) hat|=SDL_HAT_UP; |
| if (buttons&CONT_DPAD2_DOWN) hat|=SDL_HAT_DOWN; |
| if (buttons&CONT_DPAD2_LEFT) hat|=SDL_HAT_LEFT; |
| if (buttons&CONT_DPAD2_RIGHT) hat|=SDL_HAT_RIGHT; |
| SDL_PrivateJoystickHat(joystick, 1, hat); |
| } |
| |
| for(i=0;i<sizeof(sdl_buttons)/sizeof(sdl_buttons[0]);i++) { |
| if (changed & sdl_buttons[i]) { |
| SDL_PrivateJoystickButton(joystick, i, (buttons & sdl_buttons[i])?SDL_PRESSED:SDL_RELEASED); |
| } |
| } |
| |
| prev_cond = &joystick->hwdata->prev_cond; |
| if (cond.joyx!=prev_cond->joyx) |
| SDL_PrivateJoystickAxis(joystick, 0, cond.joyx-128); |
| if (cond.joyy!=prev_cond->joyy) |
| SDL_PrivateJoystickAxis(joystick, 1, cond.joyy-128); |
| if (cond.rtrig!=prev_cond->rtrig) |
| SDL_PrivateJoystickAxis(joystick, 2, cond.rtrig); |
| if (cond.ltrig!=prev_cond->ltrig) |
| SDL_PrivateJoystickAxis(joystick, 3, cond.ltrig); |
| if (cond.joy2x!=prev_cond->joy2x) |
| SDL_PrivateJoystickAxis(joystick, 4, cond.joy2x-128); |
| if (cond.joy2y!=prev_cond->joy2y) |
| SDL_PrivateJoystickAxis(joystick, 5, cond.joy2y-128); |
| |
| joystick->hwdata->prev_buttons = buttons; |
| joystick->hwdata->prev_cond = cond; |
| } |
| |
| /* Function to close a joystick after use */ |
| void SDL_SYS_JoystickClose(SDL_Joystick *joystick) |
| { |
| if (joystick->hwdata != NULL) { |
| /* free system specific hardware data */ |
| SDL_free(joystick->hwdata); |
| } |
| } |
| |
| /* Function to perform any system-specific joystick related cleanup */ |
| void SDL_SYS_JoystickQuit(void) |
| { |
| return; |
| } |
| |
| #endif /* SDL_JOYSTICK_DC */ |