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 | #ifdef SDL_JOYSTICK_DC |
25 | |
26 | #include "SDL_events.h" |
27 | #include "SDL_joystick.h" |
28 | #include "../SDL_sysjoystick.h" |
29 | #include "../SDL_joystick_c.h" |
30 | |
31 | #include <dc/maple.h> |
32 | #include <dc/maple/controller.h> |
33 | |
34 | #define MAX_JOYSTICKS 8 /* only 2 are supported in the multimedia API */ |
35 | #define MAX_AXES 6 /* each joystick can have up to 6 axes */ |
36 | #define MAX_BUTTONS 8 /* and 8 buttons */ |
37 | #define MAX_HATS 2 |
38 | |
39 | #define JOYNAMELEN 8 |
40 | |
41 | /* array to hold joystick ID values */ |
42 | static uint8 SYS_Joystick_addr[MAX_JOYSTICKS]; |
43 | |
44 | /* The private structure used to keep track of a joystick */ |
45 | struct joystick_hwdata |
46 | { |
47 | cont_cond_t prev_cond; |
48 | int prev_buttons; |
49 | }; |
50 | |
51 | /* Function to scan the system for joysticks. |
52 | * This function should set SDL_numjoysticks to the number of available |
53 | * joysticks. Joystick 0 should be the system default joystick. |
54 | * It should return 0, or -1 on an unrecoverable fatal error. |
55 | */ |
56 | int SDL_SYS_JoystickInit(void) |
57 | { |
58 | int numdevs; |
59 | |
60 | int p,u; |
61 | |
62 | numdevs = 0; |
63 | for(p=0;p<MAPLE_PORT_COUNT;p++) { |
64 | for(u=0;u<MAPLE_UNIT_COUNT;u++) { |
65 | if (maple_device_func(p,u)&MAPLE_FUNC_CONTROLLER) { |
66 | SYS_Joystick_addr[numdevs] = maple_addr(p,u); |
67 | numdevs++; |
68 | } |
69 | } |
70 | } |
71 | |
72 | return(numdevs); |
73 | } |
74 | |
75 | /* Function to get the device-dependent name of a joystick */ |
76 | const char *SDL_SYS_JoystickName(int index) |
77 | { |
78 | maple_device_t *dev; |
79 | if (maple_compat_resolve(SYS_Joystick_addr[index],&dev,MAPLE_FUNC_CONTROLLER)!=0) return NULL; |
80 | return dev->info.product_name; |
81 | } |
82 | |
83 | /* Function to open a joystick for use. |
84 | The joystick to open is specified by the index field of the joystick. |
85 | This should fill the nbuttons and naxes fields of the joystick structure. |
86 | It returns 0, or -1 if there is an error. |
87 | */ |
88 | int SDL_SYS_JoystickOpen(SDL_Joystick *joystick) |
89 | { |
90 | /* allocate memory for system specific hardware data */ |
91 | joystick->hwdata = (struct joystick_hwdata *) SDL_malloc(sizeof(*joystick->hwdata)); |
92 | if (joystick->hwdata == NULL) |
93 | { |
94 | SDL_OutOfMemory(); |
95 | return(-1); |
96 | } |
97 | SDL_memset(joystick->hwdata, 0, sizeof(*joystick->hwdata)); |
98 | |
99 | /* fill nbuttons, naxes, and nhats fields */ |
100 | joystick->nbuttons = MAX_BUTTONS; |
101 | joystick->naxes = MAX_AXES; |
102 | joystick->nhats = MAX_HATS; |
103 | return(0); |
104 | } |
105 | |
106 | |
107 | /* Function to update the state of a joystick - called as a device poll. |
108 | * This function shouldn't update the joystick structure directly, |
109 | * but instead should call SDL_PrivateJoystick*() to deliver events |
110 | * and update joystick device state. |
111 | */ |
112 | |
113 | void SDL_SYS_JoystickUpdate(SDL_Joystick *joystick) |
114 | { |
115 | const int sdl_buttons[] = { |
116 | CONT_C, |
117 | CONT_B, |
118 | CONT_A, |
119 | CONT_START, |
120 | CONT_Z, |
121 | CONT_Y, |
122 | CONT_X, |
123 | CONT_D |
124 | }; |
125 | |
126 | uint8 addr; |
127 | cont_cond_t cond,*prev_cond; |
128 | int buttons,prev_buttons,i,changed; |
129 | |
130 | addr = SYS_Joystick_addr[joystick->index]; |
131 | if (cont_get_cond(addr,&cond)<0) return; |
132 | |
133 | buttons = cond.buttons; |
134 | prev_buttons = joystick->hwdata->prev_buttons; |
135 | changed = buttons^prev_buttons; |
136 | |
137 | if ((changed)&(CONT_DPAD_UP|CONT_DPAD_DOWN|CONT_DPAD_LEFT|CONT_DPAD_RIGHT)) { |
138 | int hat = SDL_HAT_CENTERED; |
139 | if (buttons&CONT_DPAD_UP) hat|=SDL_HAT_UP; |
140 | if (buttons&CONT_DPAD_DOWN) hat|=SDL_HAT_DOWN; |
141 | if (buttons&CONT_DPAD_LEFT) hat|=SDL_HAT_LEFT; |
142 | if (buttons&CONT_DPAD_RIGHT) hat|=SDL_HAT_RIGHT; |
143 | SDL_PrivateJoystickHat(joystick, 0, hat); |
144 | } |
145 | if ((changed)&(CONT_DPAD2_UP|CONT_DPAD2_DOWN|CONT_DPAD2_LEFT|CONT_DPAD2_RIGHT)) { |
146 | int hat = SDL_HAT_CENTERED; |
147 | if (buttons&CONT_DPAD2_UP) hat|=SDL_HAT_UP; |
148 | if (buttons&CONT_DPAD2_DOWN) hat|=SDL_HAT_DOWN; |
149 | if (buttons&CONT_DPAD2_LEFT) hat|=SDL_HAT_LEFT; |
150 | if (buttons&CONT_DPAD2_RIGHT) hat|=SDL_HAT_RIGHT; |
151 | SDL_PrivateJoystickHat(joystick, 1, hat); |
152 | } |
153 | |
154 | for(i=0;i<sizeof(sdl_buttons)/sizeof(sdl_buttons[0]);i++) { |
155 | if (changed & sdl_buttons[i]) { |
156 | SDL_PrivateJoystickButton(joystick, i, (buttons & sdl_buttons[i])?SDL_PRESSED:SDL_RELEASED); |
157 | } |
158 | } |
159 | |
160 | prev_cond = &joystick->hwdata->prev_cond; |
161 | if (cond.joyx!=prev_cond->joyx) |
162 | SDL_PrivateJoystickAxis(joystick, 0, cond.joyx-128); |
163 | if (cond.joyy!=prev_cond->joyy) |
164 | SDL_PrivateJoystickAxis(joystick, 1, cond.joyy-128); |
165 | if (cond.rtrig!=prev_cond->rtrig) |
166 | SDL_PrivateJoystickAxis(joystick, 2, cond.rtrig); |
167 | if (cond.ltrig!=prev_cond->ltrig) |
168 | SDL_PrivateJoystickAxis(joystick, 3, cond.ltrig); |
169 | if (cond.joy2x!=prev_cond->joy2x) |
170 | SDL_PrivateJoystickAxis(joystick, 4, cond.joy2x-128); |
171 | if (cond.joy2y!=prev_cond->joy2y) |
172 | SDL_PrivateJoystickAxis(joystick, 5, cond.joy2y-128); |
173 | |
174 | joystick->hwdata->prev_buttons = buttons; |
175 | joystick->hwdata->prev_cond = cond; |
176 | } |
177 | |
178 | /* Function to close a joystick after use */ |
179 | void SDL_SYS_JoystickClose(SDL_Joystick *joystick) |
180 | { |
181 | if (joystick->hwdata != NULL) { |
182 | /* free system specific hardware data */ |
183 | SDL_free(joystick->hwdata); |
184 | } |
185 | } |
186 | |
187 | /* Function to perform any system-specific joystick related cleanup */ |
188 | void SDL_SYS_JoystickQuit(void) |
189 | { |
190 | return; |
191 | } |
192 | |
193 | #endif /* SDL_JOYSTICK_DC */ |