| 1 | /* FCE Ultra - NES/Famicom Emulator |
| 2 | * |
| 3 | * Copyright notice for this file: |
| 4 | * Copyright (C) 2002 Ben Parnell |
| 5 | * Copyright (C) 2002 Paul Kuliniewicz |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 2 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with this program; if not, write to the Free Software |
| 19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 20 | */ |
| 21 | |
| 22 | /* PK: SDL joystick input stuff */ |
| 23 | |
| 24 | #include <stdlib.h> |
| 25 | #include <unistd.h> |
| 26 | #include <fcntl.h> |
| 27 | #include <errno.h> |
| 28 | |
| 29 | #include "sdl.h" |
| 30 | static SDL_Joystick *jo[4] = {NULL, NULL, NULL, NULL}; |
| 31 | |
| 32 | static void ConfigJoystick (int z); |
| 33 | |
| 34 | #define JOY_A 0x01 |
| 35 | #define JOY_B 0x02 |
| 36 | #define JOY_SELECT 0x04 |
| 37 | #define JOY_START 0x08 |
| 38 | #define JOY_UP 0x10 |
| 39 | #define JOY_DOWN 0x20 |
| 40 | #define JOY_LEFT 0x40 |
| 41 | #define JOY_RIGHT 0x80 |
| 42 | |
| 43 | /* Gets the current joystick position information. */ |
| 44 | uint32 GetJSOr (void) |
| 45 | { |
| 46 | int n; /* joystick index */ |
| 47 | int b; /* button index */ |
| 48 | int *joym; /* pointer to a joystick's button map */ |
| 49 | Sint16 pos; /* axis position */ |
| 50 | uint32 ret = 0; /* return value */ |
| 51 | |
| 52 | for (n = 0; n < 4; n++) |
| 53 | { |
| 54 | if (joy[n] == 0) |
| 55 | continue; |
| 56 | joym = joyBMap[n]; |
| 57 | |
| 58 | /* Axis information. */ |
| 59 | pos = SDL_JoystickGetAxis(jo[n], joyAMap[n][0]); |
| 60 | if (pos <= -16383) |
| 61 | ret |= JOY_LEFT << (n << 3); |
| 62 | else if (pos >= 16363) |
| 63 | ret |= JOY_RIGHT << (n << 3); |
| 64 | pos = SDL_JoystickGetAxis(jo[n], joyAMap[n][1]); |
| 65 | if (pos <= -16383) |
| 66 | ret |= JOY_UP << (n << 3); |
| 67 | else if (pos >= 16383) |
| 68 | ret |= JOY_DOWN << (n << 3); |
| 69 | |
| 70 | /* Button information. */ |
| 71 | for (b = 0; b < 4; b++) |
| 72 | { |
| 73 | if (SDL_JoystickGetButton(jo[n], joym[b])) |
| 74 | ret |= (1 << b) << (n << 3); |
| 75 | } |
| 76 | } |
| 77 | |
| 78 | return ret; |
| 79 | } |
| 80 | |
| 81 | /* Cleanup opened joysticks. */ |
| 82 | void KillJoysticks (void) |
| 83 | { |
| 84 | int n; /* joystick index */ |
| 85 | |
| 86 | for (n = 0; n < 4; n++) |
| 87 | { |
| 88 | if (joy[n] != 0) |
| 89 | SDL_JoystickClose(jo[n]); |
| 90 | } |
| 91 | SDL_QuitSubSystem(SDL_INIT_JOYSTICK); |
| 92 | return; |
| 93 | } |
| 94 | |
| 95 | /* Initialize joysticks. */ |
| 96 | int InitJoysticks (void) |
| 97 | { |
| 98 | int n; /* joystick index */ |
| 99 | if(!(joy[0]|joy[1]|joy[2]|joy[3])) |
| 100 | return(0); |
| 101 | SDL_InitSubSystem(SDL_INIT_JOYSTICK); |
| 102 | for (n = 0; n < 4; n++) |
| 103 | { |
| 104 | if (joy[n] == 0) |
| 105 | continue; |
| 106 | |
| 107 | /* Open the joystick under SDL. */ |
| 108 | jo[n] = SDL_JoystickOpen(joy[n] - 1); |
| 109 | if (jo[n] == NULL) |
| 110 | { |
| 111 | printf("Could not open joystick %d: %s.\n", |
| 112 | joy[n] - 1, SDL_GetError()); |
| 113 | joy[n] = 0; |
| 114 | continue; |
| 115 | } |
| 116 | |
| 117 | /* Check for a button map. */ |
| 118 | if (!(joyBMap[n][0] | joyBMap[n][1] | joyBMap[n][2] | |
| 119 | joyBMap[n][3])) |
| 120 | { |
| 121 | ConfigJoystick(n); |
| 122 | } |
| 123 | } |
| 124 | |
| 125 | return (1); |
| 126 | } |
| 127 | |
| 128 | #define WNOINPUT(); for(;;){uint8 t; if(read(fileno(stdin),&t,1)==-1) \ |
| 129 | {break;}} |
| 130 | |
| 131 | /* Configure a joystick button. */ |
| 132 | static void BConfig (int n, int b) |
| 133 | { |
| 134 | SDL_Event event; /* SDL event structure */ |
| 135 | WNOINPUT(); |
| 136 | while (1) |
| 137 | { |
| 138 | uint8 t; |
| 139 | if (read(fileno(stdin), &t, 1) == -1) |
| 140 | { |
| 141 | if (errno != EAGAIN) |
| 142 | break; |
| 143 | } |
| 144 | else |
| 145 | break; |
| 146 | |
| 147 | if (SDL_PollEvent(&event) && event.type == SDL_JOYBUTTONDOWN) |
| 148 | { |
| 149 | joyBMap[n][b] = event.jbutton.button; |
| 150 | goto endsa; |
| 151 | } |
| 152 | } |
| 153 | |
| 154 | endsa: |
| 155 | WNOINPUT(); |
| 156 | |
| 157 | return; |
| 158 | } |
| 159 | |
| 160 | /* Joystick button and axis configuration. */ |
| 161 | void ConfigJoystick (int n) |
| 162 | { |
| 163 | int sa; /* buffer value */ |
| 164 | char buf[128]; /* input buffer */ |
| 165 | |
| 166 | printf("\n\n Joystick button and axis configuration:\n\n"); |
| 167 | printf(" Select the joystick axes to use for the virtual d-pad.\n"); |
| 168 | printf(" If you do not wish to assign an axis, press Enter to skip\n"); |
| 169 | printf(" that axis.\n"); |
| 170 | printf(" Push the button to map to the virtual joystick.\n"); |
| 171 | printf(" If you do not wish to assign a button, press Enter to skip\n"); |
| 172 | printf(" that button.\n Press enter to continue...\n"); |
| 173 | getchar(); |
| 174 | printf("**** Configuring joystick %d ****\n\n", n + 1); |
| 175 | |
| 176 | printf("** Enter axis to use for the x-axis (default 0).\n"); |
| 177 | fgets(buf, sizeof(buf), stdin); |
| 178 | joyAMap[n][0] = ('0' <= buf[0] && buf[9] <= '9') ? atoi(buf) : 0; |
| 179 | |
| 180 | printf("** Enter axis to use for the y-axis (default 1).\n"); |
| 181 | fgets(buf, sizeof(buf), stdin); |
| 182 | joyAMap[n][1] = ('0' <= buf[0] && buf[9] <= '9') ? atoi(buf) : 1; |
| 183 | |
| 184 | sa = fcntl(fileno(stdin), F_GETFL); |
| 185 | fcntl(fileno(stdin), F_SETFL, O_NONBLOCK); |
| 186 | |
| 187 | printf("** Press button for \"Select\".\n"); |
| 188 | BConfig(n, 2); |
| 189 | |
| 190 | printf("** Press button for \"Start\".\n"); |
| 191 | BConfig(n, 3); |
| 192 | |
| 193 | printf("** Press button for \"B\".\n"); |
| 194 | BConfig(n, 1); |
| 195 | |
| 196 | printf("** Press button for \"A\".\n"); |
| 197 | BConfig(n, 0); |
| 198 | |
| 199 | fcntl(fileno(stdin), F_SETFL, sa); |
| 200 | } |