Mercurial > sdl-ios-xcode
annotate src/joystick/beos/SDL_bejoystick.cc @ 4050:ef815c44c662 SDL-1.2
Warn Visual C++ users if they have a stale configure generated SDL_config.h
author | Sam Lantinga <slouken@libsdl.org> |
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date | Thu, 12 Jul 2007 02:51:58 +0000 |
parents | 92947e3a18db |
children | 782fd950bd46 c121d94672cb a1b03ba2fcd0 |
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0 | 1 /* |
2 SDL - Simple DirectMedia Layer | |
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3 Copyright (C) 1997-2006 Sam Lantinga |
0 | 4 |
5 This library is free software; you can redistribute it and/or | |
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6 modify it under the terms of the GNU Lesser General Public |
0 | 7 License as published by the Free Software Foundation; either |
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8 version 2.1 of the License, or (at your option) any later version. |
0 | 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 | |
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13 Lesser General Public License for more details. |
0 | 14 |
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15 You should have received a copy of the GNU Lesser General Public |
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16 License along with this library; if not, write to the Free Software |
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
0 | 18 |
19 Sam Lantinga | |
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20 slouken@libsdl.org |
0 | 21 */ |
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22 #include "SDL_config.h" |
0 | 23 |
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24 #ifdef SDL_JOYSTICK_BEOS |
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25 |
0 | 26 /* This is the system specific header for the SDL joystick API */ |
27 | |
28 #include <be/support/String.h> | |
29 #include <be/device/Joystick.h> | |
30 | |
31 extern "C" { | |
32 | |
33 #include "SDL_joystick.h" | |
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34 #include "../SDL_sysjoystick.h" |
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35 #include "../SDL_joystick_c.h" |
0 | 36 |
37 | |
38 /* The maximum number of joysticks we'll detect */ | |
39 #define MAX_JOYSTICKS 16 | |
40 | |
41 /* A list of available joysticks */ | |
42 static char *SDL_joyport[MAX_JOYSTICKS]; | |
43 static char *SDL_joyname[MAX_JOYSTICKS]; | |
44 | |
45 /* The private structure used to keep track of a joystick */ | |
46 struct joystick_hwdata { | |
47 BJoystick *stick; | |
48 uint8 *new_hats; | |
49 int16 *new_axes; | |
50 }; | |
51 | |
52 /* Function to scan the system for joysticks. | |
53 * This function should set SDL_numjoysticks to the number of available | |
54 * joysticks. Joystick 0 should be the system default joystick. | |
55 * It should return 0, or -1 on an unrecoverable fatal error. | |
56 */ | |
57 int SDL_SYS_JoystickInit(void) | |
58 { | |
59 BJoystick joystick; | |
60 int numjoysticks; | |
61 int i; | |
62 int32 nports; | |
63 char name[B_OS_NAME_LENGTH]; | |
64 | |
65 /* Search for attached joysticks */ | |
66 nports = joystick.CountDevices(); | |
67 numjoysticks = 0; | |
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68 SDL_memset(SDL_joyport, 0, (sizeof SDL_joyport)); |
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69 SDL_memset(SDL_joyname, 0, (sizeof SDL_joyname)); |
0 | 70 for ( i=0; (SDL_numjoysticks < MAX_JOYSTICKS) && (i < nports); ++i ) { |
71 if ( joystick.GetDeviceName(i, name) == B_OK ) { | |
72 if ( joystick.Open(name) != B_ERROR ) { | |
73 BString stick_name; | |
74 joystick.GetControllerName(&stick_name); | |
75 SDL_joyport[numjoysticks] = strdup(name); | |
76 SDL_joyname[numjoysticks] = | |
77 strdup(stick_name.String()); | |
78 numjoysticks++; | |
79 joystick.Close(); | |
80 } | |
81 } | |
82 } | |
83 return(numjoysticks); | |
84 } | |
85 | |
86 /* Function to get the device-dependent name of a joystick */ | |
87 const char *SDL_SYS_JoystickName(int index) | |
88 { | |
89 return SDL_joyname[index]; | |
90 } | |
91 | |
92 /* Function to open a joystick for use. | |
93 The joystick to open is specified by the index field of the joystick. | |
94 This should fill the nbuttons and naxes fields of the joystick structure. | |
95 It returns 0, or -1 if there is an error. | |
96 */ | |
97 int SDL_SYS_JoystickOpen(SDL_Joystick *joystick) | |
98 { | |
99 BJoystick *stick; | |
100 | |
101 /* Create the joystick data structure */ | |
102 joystick->hwdata = (struct joystick_hwdata *) | |
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103 SDL_malloc(sizeof(*joystick->hwdata)); |
0 | 104 if ( joystick->hwdata == NULL ) { |
105 SDL_OutOfMemory(); | |
106 return(-1); | |
107 } | |
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108 SDL_memset(joystick->hwdata, 0, sizeof(*joystick->hwdata)); |
0 | 109 stick = new BJoystick; |
110 joystick->hwdata->stick = stick; | |
111 | |
112 /* Open the requested joystick for use */ | |
113 if ( stick->Open(SDL_joyport[joystick->index]) == B_ERROR ) { | |
114 SDL_SetError("Unable to open joystick"); | |
115 SDL_SYS_JoystickClose(joystick); | |
116 return(-1); | |
117 } | |
118 | |
119 /* Set the joystick to calibrated mode */ | |
120 stick->EnableCalibration(); | |
121 | |
122 /* Get the number of buttons, hats, and axes on the joystick */ | |
123 joystick->nbuttons = stick->CountButtons(); | |
124 joystick->naxes = stick->CountAxes(); | |
125 joystick->nhats = stick->CountHats(); | |
126 | |
127 joystick->hwdata->new_axes = (int16 *) | |
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128 SDL_malloc(joystick->naxes*sizeof(int16)); |
0 | 129 joystick->hwdata->new_hats = (uint8 *) |
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130 SDL_malloc(joystick->nhats*sizeof(uint8)); |
0 | 131 if ( ! joystick->hwdata->new_hats || ! joystick->hwdata->new_axes ) { |
132 SDL_OutOfMemory(); | |
133 SDL_SYS_JoystickClose(joystick); | |
134 return(-1); | |
135 } | |
136 | |
137 /* We're done! */ | |
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 static const Uint8 hat_map[9] = { | |
149 SDL_HAT_CENTERED, | |
150 SDL_HAT_UP, | |
151 SDL_HAT_RIGHTUP, | |
152 SDL_HAT_RIGHT, | |
153 SDL_HAT_RIGHTDOWN, | |
154 SDL_HAT_DOWN, | |
155 SDL_HAT_LEFTDOWN, | |
156 SDL_HAT_LEFT, | |
157 SDL_HAT_LEFTUP | |
158 }; | |
159 const int JITTER = (32768/10); /* 10% jitter threshold (ok?) */ | |
160 | |
161 BJoystick *stick; | |
162 int i, change; | |
163 int16 *axes; | |
164 uint8 *hats; | |
165 uint32 buttons; | |
166 | |
167 /* Set up data pointers */ | |
168 stick = joystick->hwdata->stick; | |
169 axes = joystick->hwdata->new_axes; | |
170 hats = joystick->hwdata->new_hats; | |
171 | |
172 /* Get the new joystick state */ | |
173 stick->Update(); | |
174 stick->GetAxisValues(axes); | |
175 stick->GetHatValues(hats); | |
176 buttons = stick->ButtonValues(); | |
177 | |
178 /* Generate axis motion events */ | |
179 for ( i=0; i<joystick->naxes; ++i ) { | |
180 change = ((int32)axes[i] - joystick->axes[i]); | |
181 if ( (change > JITTER) || (change < -JITTER) ) { | |
182 SDL_PrivateJoystickAxis(joystick, i, axes[i]); | |
183 } | |
184 } | |
185 | |
186 /* Generate hat change events */ | |
187 for ( i=0; i<joystick->nhats; ++i ) { | |
188 if ( hats[i] != joystick->hats[i] ) { | |
189 SDL_PrivateJoystickHat(joystick, i, hat_map[hats[i]]); | |
190 } | |
191 } | |
192 | |
193 /* Generate button events */ | |
194 for ( i=0; i<joystick->nbuttons; ++i ) { | |
195 if ( (buttons&0x01) != joystick->buttons[i] ) { | |
196 SDL_PrivateJoystickButton(joystick, i, (buttons&0x01)); | |
197 } | |
198 buttons >>= 1; | |
199 } | |
200 } | |
201 | |
202 /* Function to close a joystick after use */ | |
203 void SDL_SYS_JoystickClose(SDL_Joystick *joystick) | |
204 { | |
205 if ( joystick->hwdata ) { | |
206 joystick->hwdata->stick->Close(); | |
207 delete joystick->hwdata->stick; | |
208 if ( joystick->hwdata->new_hats ) { | |
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209 SDL_free(joystick->hwdata->new_hats); |
0 | 210 } |
211 if ( joystick->hwdata->new_axes ) { | |
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212 SDL_free(joystick->hwdata->new_axes); |
0 | 213 } |
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214 SDL_free(joystick->hwdata); |
0 | 215 joystick->hwdata = NULL; |
216 } | |
217 } | |
218 | |
219 /* Function to perform any system-specific joystick related cleanup */ | |
220 void SDL_SYS_JoystickQuit(void) | |
221 { | |
222 int i; | |
223 | |
224 for ( i=0; SDL_joyport[i]; ++i ) { | |
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225 SDL_free(SDL_joyport[i]); |
0 | 226 } |
227 SDL_joyport[0] = NULL; | |
228 | |
229 for ( i=0; SDL_joyname[i]; ++i ) { | |
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230 SDL_free(SDL_joyname[i]); |
0 | 231 } |
232 SDL_joyname[0] = NULL; | |
233 } | |
234 | |
235 }; // extern "C" | |
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236 |
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237 #endif /* SDL_JOYSTICK_BEOS */ |