e14743d1 |
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 | } |