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comparison src/video/ataricommon/SDL_ataridevmouse.c @ 1420:2405517b5eab

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Added preliminary support for MiNT /dev/mouse driver (disabled atm)
author Patrice Mandin <patmandin@gmail.com>
date Thu, 23 Feb 2006 21:51:10 +0000
parents
children 782fd950bd46 c121d94672cb a1b03ba2fcd0
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1419:36a5068bf7df 1420:2405517b5eab
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@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 }