1 /* 2 SDL - Simple DirectMedia Layer 3 Copyright (C) 1997-2006 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 (at) libsdl.org 21 */ 22 #include "SDL_config.h" 23 24 #ifdef SDL_JOYSTICK_AMIGA 25 26 /* This is the system specific header for the SDL joystick API */ 27 28 #include <libraries/lowlevel.h> 29 #if defined(__SASC) || defined(STORMC4_WOS) 30 #include <proto/exec.h> 31 #include <proto/lowlevel.h> 32 #include <proto/graphics.h> 33 #else 34 #include <inline/exec.h> 35 #include <inline/lowlevel.h> 36 #include <inline/graphics.h> 37 #endif 38 #include "mydebug.h" 39 40 extern struct ExecBase *SysBase; 41 extern struct GfxBase *GfxBase; 42 43 #include "SDL_joystick.h" 44 #include "../SDL_sysjoystick.h" 45 #include "../SDL_joystick_c.h" 46 47 /* Function to scan the system for joysticks. 48 * This function should set SDL_numjoysticks to the number of available 49 * joysticks. Joystick 0 should be the system default joystick. 50 * It should return 0, or -1 on an unrecoverable fatal error. 51 */ 52 53 54 /* Amiga specific datas */ 55 struct Library *LowLevelBase=NULL; 56 57 ULONG joybut[]= 58 { 59 JPF_BUTTON_RED, 60 JPF_BUTTON_BLUE, 61 JPF_BUTTON_PLAY, 62 JPF_BUTTON_YELLOW, 63 JPF_BUTTON_GREEN, 64 JPF_BUTTON_FORWARD, 65 JPF_BUTTON_REVERSE, 66 }; 67 68 struct joystick_hwdata 69 { 70 ULONG joystate; 71 }; 72 73 int SDL_SYS_JoystickInit(void) 74 { 75 if(!LowLevelBase) 76 { 77 if(LowLevelBase=OpenLibrary("lowlevel.library",37)) 78 return 2; 79 } 80 else 81 return 2; 82 83 D(bug("%ld joysticks available.\n",SDL_numjoysticks)); 84 85 return 0; 86 } 87 88 /* Function to get the device-dependent name of a joystick */ 89 const char *SDL_SYS_JoystickName(int index) 90 { 91 if(index<2&&LowLevelBase) 92 { 93 switch(index) 94 { 95 case 0: 96 return "Port 1 Amiga Joystick/Joypad"; 97 case 1: 98 return "Port 2 Amiga Joystick/Joypad"; 99 } 100 } 101 102 SDL_SetError("No joystick available with that index"); 103 return(NULL); 104 } 105 106 /* Function to open a joystick for use. 107 The joystick to open is specified by the index field of the joystick. 108 This should fill the nbuttons and naxes fields of the joystick structure. 109 It returns 0, or -1 if there is an error. 110 */ 111 112 int SDL_SYS_JoystickOpen(SDL_Joystick *joystick) 113 { 114 ULONG temp,i; 115 D(bug("Opening joystick %ld\n",joystick->index)); 116 117 if(!(joystick->hwdata=SDL_malloc(sizeof(struct joystick_hwdata)))) 118 return -1; 119 120 /* This loop is to check if the controller is a joypad */ 121 122 for(i=0;i<20;i++) 123 { 124 temp=ReadJoyPort(joystick->index^1); // fix to invert amiga joyports 125 WaitTOF(); 126 } 127 128 if((temp&JP_TYPE_MASK)==JP_TYPE_GAMECTLR) 129 joystick->nbuttons=7; 130 else 131 joystick->nbuttons=3; 132 133 joystick->nhats=0; 134 joystick->nballs=0; 135 joystick->naxes=2; 136 joystick->hwdata->joystate=0L; 137 138 return 0; 139 } 140 141 /* Function to update the state of a joystick - called as a device poll. 142 * This function shouldn't update the joystick structure directly, 143 * but instead should call SDL_PrivateJoystick*() to deliver events 144 * and update joystick device state. 145 */ 146 void SDL_SYS_JoystickUpdate(SDL_Joystick *joystick) 147 { 148 ULONG data; 149 int i; 150 151 if(joystick->index<2) 152 { 153 data=ReadJoyPort(joystick->index); 154 155 if(data&JP_DIRECTION_MASK) 156 { 157 if(data&JPF_JOY_DOWN) 158 { 159 if(!(joystick->hwdata->joystate&JPF_JOY_DOWN)) 160 SDL_PrivateJoystickAxis(joystick,0,127); 161 } 162 else if(data&JPF_JOY_UP) 163 { 164 if(!(joystick->hwdata->joystate&JPF_JOY_UP)) 165 SDL_PrivateJoystickAxis(joystick,0,-127); 166 } 167 else if(joystick->hwdata->joystate&(JPF_JOY_UP|JPF_JOY_DOWN)) 168 SDL_PrivateJoystickAxis(joystick,0,0); 169 170 if(data&JPF_JOY_LEFT) 171 { 172 if(!(joystick->hwdata->joystate&JPF_JOY_LEFT)) 173 SDL_PrivateJoystickAxis(joystick,1,-127); 174 } 175 else if(data&JPF_JOY_RIGHT) 176 { 177 if(!(joystick->hwdata->joystate&JPF_JOY_RIGHT)) 178 SDL_PrivateJoystickAxis(joystick,1,127); 179 } 180 else if(joystick->hwdata->joystate&(JPF_JOY_LEFT|JPF_JOY_RIGHT)) 181 SDL_PrivateJoystickAxis(joystick,1,0); 182 } 183 else if(joystick->hwdata->joystate&(JPF_JOY_LEFT|JPF_JOY_RIGHT)) 184 { 185 SDL_PrivateJoystickAxis(joystick,1,0); 186 } 187 else if(joystick->hwdata->joystate&(JPF_JOY_UP|JPF_JOY_DOWN)) 188 { 189 SDL_PrivateJoystickAxis(joystick,0,0); 190 } 191 192 for(i=0;i<joystick->nbuttons;i++) 193 { 194 if( (data&joybut[i]) ) 195 { 196 if(i==1) 197 data&=(~(joybut[2])); 198 199 if(!(joystick->hwdata->joystate&joybut[i])) 200 SDL_PrivateJoystickButton(joystick,i,SDL_PRESSED); 201 } 202 else if(joystick->hwdata->joystate&joybut[i]) 203 SDL_PrivateJoystickButton(joystick,i,SDL_RELEASED); 204 } 205 206 joystick->hwdata->joystate=data; 207 } 208 209 return; 210 } 211 212 /* Function to close a joystick after use */ 213 void SDL_SYS_JoystickClose(SDL_Joystick *joystick) 214 { 215 if(joystick->hwdata) 216 SDL_free(joystick->hwdata); 217 return; 218 } 219 220 /* Function to perform any system-specific joystick related cleanup */ 221 222 void SDL_SYS_JoystickQuit(void) 223 { 224 if(LowLevelBase) 225 { 226 CloseLibrary(LowLevelBase); 227 LowLevelBase=NULL; 228 SDL_numjoysticks=0; 229 } 230 return; 231 } 232 233 #endif /* SDL_JOYSTICK_AMIGA */ 234
