| 1 | /* |
| 2 | SDL - Simple DirectMedia Layer |
| 3 | Copyright (C) 1997-2009 Sam Lantinga |
| 4 | |
| 5 | This library is free software; you can redistribute it and/or |
| 6 | modify it under the terms of the GNU Lesser General Public |
| 7 | License as published by the Free Software Foundation; either |
| 8 | version 2.1 of the License, or (at your option) any later version. |
| 9 | |
| 10 | This library is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | Lesser General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU Lesser General Public |
| 16 | License along with this library; if not, write to the Free Software |
| 17 | Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 18 | |
| 19 | Sam Lantinga |
| 20 | slouken@libsdl.org |
| 21 | */ |
| 22 | #include "SDL_config.h" |
| 23 | |
| 24 | #ifdef SDL_JOYSTICK_DC |
| 25 | |
| 26 | #include "SDL_events.h" |
| 27 | #include "SDL_joystick.h" |
| 28 | #include "../SDL_sysjoystick.h" |
| 29 | #include "../SDL_joystick_c.h" |
| 30 | |
| 31 | #include <dc/maple.h> |
| 32 | #include <dc/maple/controller.h> |
| 33 | |
| 34 | #define MAX_JOYSTICKS 8 /* only 2 are supported in the multimedia API */ |
| 35 | #define MAX_AXES 6 /* each joystick can have up to 6 axes */ |
| 36 | #define MAX_BUTTONS 8 /* and 8 buttons */ |
| 37 | #define MAX_HATS 2 |
| 38 | |
| 39 | #define JOYNAMELEN 8 |
| 40 | |
| 41 | /* array to hold joystick ID values */ |
| 42 | static uint8 SYS_Joystick_addr[MAX_JOYSTICKS]; |
| 43 | |
| 44 | /* The private structure used to keep track of a joystick */ |
| 45 | struct joystick_hwdata |
| 46 | { |
| 47 | cont_cond_t prev_cond; |
| 48 | int prev_buttons; |
| 49 | }; |
| 50 | |
| 51 | /* Function to scan the system for joysticks. |
| 52 | * This function should set SDL_numjoysticks to the number of available |
| 53 | * joysticks. Joystick 0 should be the system default joystick. |
| 54 | * It should return 0, or -1 on an unrecoverable fatal error. |
| 55 | */ |
| 56 | int SDL_SYS_JoystickInit(void) |
| 57 | { |
| 58 | int numdevs; |
| 59 | |
| 60 | int p,u; |
| 61 | |
| 62 | numdevs = 0; |
| 63 | for(p=0;p<MAPLE_PORT_COUNT;p++) { |
| 64 | for(u=0;u<MAPLE_UNIT_COUNT;u++) { |
| 65 | if (maple_device_func(p,u)&MAPLE_FUNC_CONTROLLER) { |
| 66 | SYS_Joystick_addr[numdevs] = maple_addr(p,u); |
| 67 | numdevs++; |
| 68 | } |
| 69 | } |
| 70 | } |
| 71 | |
| 72 | return(numdevs); |
| 73 | } |
| 74 | |
| 75 | /* Function to get the device-dependent name of a joystick */ |
| 76 | const char *SDL_SYS_JoystickName(int index) |
| 77 | { |
| 78 | maple_device_t *dev; |
| 79 | if (maple_compat_resolve(SYS_Joystick_addr[index],&dev,MAPLE_FUNC_CONTROLLER)!=0) return NULL; |
| 80 | return dev->info.product_name; |
| 81 | } |
| 82 | |
| 83 | /* Function to open a joystick for use. |
| 84 | The joystick to open is specified by the index field of the joystick. |
| 85 | This should fill the nbuttons and naxes fields of the joystick structure. |
| 86 | It returns 0, or -1 if there is an error. |
| 87 | */ |
| 88 | int SDL_SYS_JoystickOpen(SDL_Joystick *joystick) |
| 89 | { |
| 90 | /* allocate memory for system specific hardware data */ |
| 91 | joystick->hwdata = (struct joystick_hwdata *) SDL_malloc(sizeof(*joystick->hwdata)); |
| 92 | if (joystick->hwdata == NULL) |
| 93 | { |
| 94 | SDL_OutOfMemory(); |
| 95 | return(-1); |
| 96 | } |
| 97 | SDL_memset(joystick->hwdata, 0, sizeof(*joystick->hwdata)); |
| 98 | |
| 99 | /* fill nbuttons, naxes, and nhats fields */ |
| 100 | joystick->nbuttons = MAX_BUTTONS; |
| 101 | joystick->naxes = MAX_AXES; |
| 102 | joystick->nhats = MAX_HATS; |
| 103 | return(0); |
| 104 | } |
| 105 | |
| 106 | |
| 107 | /* Function to update the state of a joystick - called as a device poll. |
| 108 | * This function shouldn't update the joystick structure directly, |
| 109 | * but instead should call SDL_PrivateJoystick*() to deliver events |
| 110 | * and update joystick device state. |
| 111 | */ |
| 112 | |
| 113 | void SDL_SYS_JoystickUpdate(SDL_Joystick *joystick) |
| 114 | { |
| 115 | const int sdl_buttons[] = { |
| 116 | CONT_C, |
| 117 | CONT_B, |
| 118 | CONT_A, |
| 119 | CONT_START, |
| 120 | CONT_Z, |
| 121 | CONT_Y, |
| 122 | CONT_X, |
| 123 | CONT_D |
| 124 | }; |
| 125 | |
| 126 | uint8 addr; |
| 127 | cont_cond_t cond,*prev_cond; |
| 128 | int buttons,prev_buttons,i,changed; |
| 129 | |
| 130 | addr = SYS_Joystick_addr[joystick->index]; |
| 131 | if (cont_get_cond(addr,&cond)<0) return; |
| 132 | |
| 133 | buttons = cond.buttons; |
| 134 | prev_buttons = joystick->hwdata->prev_buttons; |
| 135 | changed = buttons^prev_buttons; |
| 136 | |
| 137 | if ((changed)&(CONT_DPAD_UP|CONT_DPAD_DOWN|CONT_DPAD_LEFT|CONT_DPAD_RIGHT)) { |
| 138 | int hat = SDL_HAT_CENTERED; |
| 139 | if (buttons&CONT_DPAD_UP) hat|=SDL_HAT_UP; |
| 140 | if (buttons&CONT_DPAD_DOWN) hat|=SDL_HAT_DOWN; |
| 141 | if (buttons&CONT_DPAD_LEFT) hat|=SDL_HAT_LEFT; |
| 142 | if (buttons&CONT_DPAD_RIGHT) hat|=SDL_HAT_RIGHT; |
| 143 | SDL_PrivateJoystickHat(joystick, 0, hat); |
| 144 | } |
| 145 | if ((changed)&(CONT_DPAD2_UP|CONT_DPAD2_DOWN|CONT_DPAD2_LEFT|CONT_DPAD2_RIGHT)) { |
| 146 | int hat = SDL_HAT_CENTERED; |
| 147 | if (buttons&CONT_DPAD2_UP) hat|=SDL_HAT_UP; |
| 148 | if (buttons&CONT_DPAD2_DOWN) hat|=SDL_HAT_DOWN; |
| 149 | if (buttons&CONT_DPAD2_LEFT) hat|=SDL_HAT_LEFT; |
| 150 | if (buttons&CONT_DPAD2_RIGHT) hat|=SDL_HAT_RIGHT; |
| 151 | SDL_PrivateJoystickHat(joystick, 1, hat); |
| 152 | } |
| 153 | |
| 154 | for(i=0;i<sizeof(sdl_buttons)/sizeof(sdl_buttons[0]);i++) { |
| 155 | if (changed & sdl_buttons[i]) { |
| 156 | SDL_PrivateJoystickButton(joystick, i, (buttons & sdl_buttons[i])?SDL_PRESSED:SDL_RELEASED); |
| 157 | } |
| 158 | } |
| 159 | |
| 160 | prev_cond = &joystick->hwdata->prev_cond; |
| 161 | if (cond.joyx!=prev_cond->joyx) |
| 162 | SDL_PrivateJoystickAxis(joystick, 0, cond.joyx-128); |
| 163 | if (cond.joyy!=prev_cond->joyy) |
| 164 | SDL_PrivateJoystickAxis(joystick, 1, cond.joyy-128); |
| 165 | if (cond.rtrig!=prev_cond->rtrig) |
| 166 | SDL_PrivateJoystickAxis(joystick, 2, cond.rtrig); |
| 167 | if (cond.ltrig!=prev_cond->ltrig) |
| 168 | SDL_PrivateJoystickAxis(joystick, 3, cond.ltrig); |
| 169 | if (cond.joy2x!=prev_cond->joy2x) |
| 170 | SDL_PrivateJoystickAxis(joystick, 4, cond.joy2x-128); |
| 171 | if (cond.joy2y!=prev_cond->joy2y) |
| 172 | SDL_PrivateJoystickAxis(joystick, 5, cond.joy2y-128); |
| 173 | |
| 174 | joystick->hwdata->prev_buttons = buttons; |
| 175 | joystick->hwdata->prev_cond = cond; |
| 176 | } |
| 177 | |
| 178 | /* Function to close a joystick after use */ |
| 179 | void SDL_SYS_JoystickClose(SDL_Joystick *joystick) |
| 180 | { |
| 181 | if (joystick->hwdata != NULL) { |
| 182 | /* free system specific hardware data */ |
| 183 | SDL_free(joystick->hwdata); |
| 184 | } |
| 185 | } |
| 186 | |
| 187 | /* Function to perform any system-specific joystick related cleanup */ |
| 188 | void SDL_SYS_JoystickQuit(void) |
| 189 | { |
| 190 | return; |
| 191 | } |
| 192 | |
| 193 | #endif /* SDL_JOYSTICK_DC */ |