| 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 | /* |
| 25 | MiNT /dev/mouse driver |
| 26 | |
| 27 | Patrice Mandin |
| 28 | */ |
| 29 | |
| 30 | #include <fcntl.h> |
| 31 | #include <unistd.h> |
| 32 | |
| 33 | #include "../../events/SDL_events_c.h" |
| 34 | #include "SDL_ataridevmouse_c.h" |
| 35 | |
| 36 | /* Defines */ |
| 37 | |
| 38 | #define DEVICE_NAME "/dev/mouse" |
| 39 | |
| 40 | /* Local variables */ |
| 41 | |
| 42 | static int handle = -1; |
| 43 | static int mouseb, prev_mouseb; |
| 44 | |
| 45 | /* Functions */ |
| 46 | |
| 47 | int SDL_AtariDevMouse_Open(void) |
| 48 | { |
| 49 | int r; |
| 50 | const char *mousedev; |
| 51 | |
| 52 | /* |
| 53 | TODO: Fix the MiNT device driver, that locks mouse for other |
| 54 | applications, so this is disabled till fixed |
| 55 | */ |
| 56 | return 0; |
| 57 | |
| 58 | /* First, try SDL_MOUSEDEV device */ |
| 59 | mousedev = SDL_getenv("SDL_MOUSEDEV"); |
| 60 | if (!mousedev) { |
| 61 | handle = open(mousedev, 0); |
| 62 | } |
| 63 | |
| 64 | /* Failed, try default device */ |
| 65 | if (handle<0) { |
| 66 | handle = open(DEVICE_NAME, 0); |
| 67 | } |
| 68 | |
| 69 | if (handle<0) { |
| 70 | handle = -1; |
| 71 | return 0; |
| 72 | } |
| 73 | |
| 74 | /* Set non blocking mode */ |
| 75 | r = fcntl(handle, F_GETFL, 0); |
| 76 | if (r<0) { |
| 77 | close(handle); |
| 78 | handle = -1; |
| 79 | return 0; |
| 80 | } |
| 81 | |
| 82 | r |= O_NDELAY; |
| 83 | |
| 84 | r = fcntl(handle, F_SETFL, r); |
| 85 | if (r<0) { |
| 86 | close(handle); |
| 87 | handle = -1; |
| 88 | return 0; |
| 89 | } |
| 90 | |
| 91 | prev_mouseb = 7; |
| 92 | return 1; |
| 93 | } |
| 94 | |
| 95 | void SDL_AtariDevMouse_Close(void) |
| 96 | { |
| 97 | if (handle>0) { |
| 98 | close(handle); |
| 99 | handle = -1; |
| 100 | } |
| 101 | } |
| 102 | |
| 103 | static int atari_GetButton(int button) |
| 104 | { |
| 105 | switch(button) |
| 106 | { |
| 107 | case 0: |
| 108 | return SDL_BUTTON_RIGHT; |
| 109 | case 1: |
| 110 | return SDL_BUTTON_MIDDLE; |
| 111 | default: |
| 112 | break; |
| 113 | } |
| 114 | |
| 115 | return SDL_BUTTON_LEFT; |
| 116 | } |
| 117 | |
| 118 | void SDL_AtariDevMouse_PostMouseEvents(_THIS, SDL_bool buttonEvents) |
| 119 | { |
| 120 | unsigned char buffer[3]; |
| 121 | int mousex, mousey; |
| 122 | |
| 123 | if (handle<0) { |
| 124 | return; |
| 125 | } |
| 126 | |
| 127 | mousex = mousey = 0; |
| 128 | while (read(handle, buffer, sizeof(buffer))==sizeof(buffer)) { |
| 129 | mouseb = buffer[0] & 7; |
| 130 | mousex += (char) buffer[1]; |
| 131 | mousey += (char) buffer[2]; |
| 132 | |
| 133 | /* Mouse button events */ |
| 134 | if (buttonEvents && (mouseb != prev_mouseb)) { |
| 135 | int i; |
| 136 | |
| 137 | for (i=0;i<3;i++) { |
| 138 | int curbutton, prevbutton; |
| 139 | |
| 140 | curbutton = mouseb & (1<<i); |
| 141 | prevbutton = prev_mouseb & (1<<i); |
| 142 | |
| 143 | if (curbutton && !prevbutton) { |
| 144 | SDL_PrivateMouseButton(SDL_RELEASED, atari_GetButton(i), 0, 0); |
| 145 | } |
| 146 | if (!curbutton && prevbutton) { |
| 147 | SDL_PrivateMouseButton(SDL_PRESSED, atari_GetButton(i), 0, 0); |
| 148 | } |
| 149 | } |
| 150 | |
| 151 | prev_mouseb = mouseb; |
| 152 | } |
| 153 | } |
| 154 | |
| 155 | /* Mouse motion event */ |
| 156 | if (mousex || mousey) { |
| 157 | SDL_PrivateMouseMotion(0, 1, mousex, -mousey); |
| 158 | } |
| 159 | } |