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comparison src/joystick/amigaos/SDL_sysjoystick.c @ 21:75a95f82bc1f

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Updated the Amiga OS port of SDL (thanks Gabriele)
author Sam Lantinga <slouken@lokigames.com>
date Thu, 10 May 2001 20:13:29 +0000
parents
children e8157fcb3114
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20:3dc008dc229d 21:75a95f82bc1f
1 /*
2 SDL - Simple DirectMedia Layer
3 Copyright (C) 1997, 1998, 1999, 2000, 2001 Sam Lantinga
4
5 This library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Library General Public
7 License as published by the Free Software Foundation; either
8 version 2 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 Library General Public License for more details.
14
15 You should have received a copy of the GNU Library General Public
16 License along with this library; if not, write to the Free
17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18
19 Sam Lantinga
20 slouken@devolution.com
21 */
22
23
24 #ifdef SAVE_RCSID
25 static char rcsid =
26 "@(#) $Id$";
27 #endif
28
29 /* This is the system specific header for the SDL joystick API */
30
31 #include <stdio.h> /* For the definition of NULL */
32
33 #include <libraries/lowlevel.h>
34 #ifdef __SASC
35 #include <proto/exec.h>
36 #include <proto/lowlevel.h>
37 #include <proto/graphics.h>
38 #else
39 #include <inline/exec.h>
40 #include <inline/lowlevel.h>
41 #include <inline/graphics.h>
42 #endif
43 #include "mydebug.h"
44
45 extern struct ExecBase *SysBase;
46 extern struct GfxBase *GfxBase;
47 #include <stdlib.h>
48
49 #include "SDL_error.h"
50 #include "SDL_joystick.h"
51 #include "SDL_sysjoystick.h"
52 #include "SDL_joystick_c.h"
53
54 /* Function to scan the system for joysticks.
55 * This function should set SDL_numjoysticks to the number of available
56 * joysticks. Joystick 0 should be the system default joystick.
57 * It should return 0, or -1 on an unrecoverable fatal error.
58 */
59
60
61 /* Amiga specific datas */
62 struct Library *LowLevelBase=NULL;
63
64 ULONG joybut[]=
65 {
66 JPF_BUTTON_RED,
67 JPF_BUTTON_BLUE,
68 JPF_BUTTON_PLAY,
69 JPF_BUTTON_YELLOW,
70 JPF_BUTTON_GREEN,
71 JPF_BUTTON_FORWARD,
72 JPF_BUTTON_REVERSE,
73 };
74
75 struct joystick_hwdata
76 {
77 ULONG joystate;
78 };
79
80 int SDL_SYS_JoystickInit(void)
81 {
82 if(!LowLevelBase)
83 {
84 if(LowLevelBase=OpenLibrary("lowlevel.library",37))
85 return 2;
86 }
87 else
88 return 2;
89
90 D(bug("%ld joysticks available.\n",SDL_numjoysticks));
91
92 return 0;
93 }
94
95 /* Function to get the device-dependent name of a joystick */
96 const char *SDL_SYS_JoystickName(int index)
97 {
98 if(index<2&&LowLevelBase)
99 {
100 switch(index)
101 {
102 case 0:
103 return "Port 1 Amiga Joystick/Joypad";
104 case 1:
105 return "Port 2 Amiga Joystick/Joypad";
106 }
107 }
108
109 SDL_SetError("No joystick available with that index");
110 return(NULL);
111 }
112
113 /* Function to open a joystick for use.
114 The joystick to open is specified by the index field of the joystick.
115 This should fill the nbuttons and naxes fields of the joystick structure.
116 It returns 0, or -1 if there is an error.
117 */
118
119 int SDL_SYS_JoystickOpen(SDL_Joystick *joystick)
120 {
121 ULONG temp,i;
122 D(bug("Opening joystick %ld\n",joystick->index));
123
124 if(!(joystick->hwdata=malloc(sizeof(struct joystick_hwdata))))
125 return -1;
126
127 /* This loop is to check if the controller is a joypad */
128
129 for(i=0;i<20;i++)
130 {
131 temp=ReadJoyPort(joystick->index);
132 WaitTOF();
133 }
134
135 if((temp&JP_TYPE_MASK)==JP_TYPE_GAMECTLR)
136 joystick->nbuttons=7;
137 else
138 joystick->nbuttons=3;
139
140 joystick->nhats=0;
141 joystick->nballs=0;
142 joystick->naxes=2;
143 joystick->hwdata->joystate=0L;
144
145 return 0;
146 }
147
148 /* Function to update the state of a joystick - called as a device poll.
149 * This function shouldn't update the joystick structure directly,
150 * but instead should call SDL_PrivateJoystick*() to deliver events
151 * and update joystick device state.
152 */
153 void SDL_SYS_JoystickUpdate(SDL_Joystick *joystick)
154 {
155 ULONG data;
156 int i;
157
158 if(joystick->index<2)
159 {
160 data=ReadJoyPort(joystick->index);
161
162 if(data&JP_DIRECTION_MASK)
163 {
164 if(data&JPF_JOY_DOWN)
165 {
166 if(!(joystick->hwdata->joystate&JPF_JOY_DOWN))
167 SDL_PrivateJoystickAxis(joystick,0,127);
168 }
169 else if(data&JPF_JOY_UP)
170 {
171 if(!(joystick->hwdata->joystate&JPF_JOY_UP))
172 SDL_PrivateJoystickAxis(joystick,0,-127);
173 }
174 else if(joystick->hwdata->joystate&(JPF_JOY_UP|JPF_JOY_DOWN))
175 SDL_PrivateJoystickAxis(joystick,0,0);
176
177 if(data&JPF_JOY_LEFT)
178 {
179 if(!(joystick->hwdata->joystate&JPF_JOY_LEFT))
180 SDL_PrivateJoystickAxis(joystick,1,-127);
181 }
182 else if(data&JPF_JOY_RIGHT)
183 {
184 if(!(joystick->hwdata->joystate&JPF_JOY_RIGHT))
185 SDL_PrivateJoystickAxis(joystick,1,127);
186 }
187 else if(joystick->hwdata->joystate&(JPF_JOY_LEFT|JPF_JOY_RIGHT))
188 SDL_PrivateJoystickAxis(joystick,1,0);
189 }
190 else if(joystick->hwdata->joystate&(JPF_JOY_LEFT|JPF_JOY_RIGHT))
191 {
192 SDL_PrivateJoystickAxis(joystick,1,0);
193 }
194 else if(joystick->hwdata->joystate&(JPF_JOY_UP|JPF_JOY_DOWN))
195 {
196 SDL_PrivateJoystickAxis(joystick,0,0);
197 }
198
199 for(i=0;i<joystick->nbuttons;i++)
200 {
201 if( (data&joybut[i]) )
202 {
203 if(i==1)
204 data&=(~(joybut[2]));
205
206 if(!(joystick->hwdata->joystate&joybut[i]))
207 SDL_PrivateJoystickButton(joystick,i,SDL_PRESSED);
208 }
209 else if(joystick->hwdata->joystate&joybut[i])
210 SDL_PrivateJoystickButton(joystick,i,SDL_RELEASED);
211 }
212
213 joystick->hwdata->joystate=data;
214 }
215
216 return;
217 }
218
219 /* Function to close a joystick after use */
220 void SDL_SYS_JoystickClose(SDL_Joystick *joystick)
221 {
222 if(joystick->hwdata)
223 free(joystick->hwdata);
224 return;
225 }
226
227 /* Function to perform any system-specific joystick related cleanup */
228
229 void SDL_SYS_JoystickQuit(void)
230 {
231 if(LowLevelBase)
232 {
233 CloseLibrary(LowLevelBase);
234 LowLevelBase=NULL;
235 SDL_numjoysticks=0;
236 }
237
238 return;
239 }
240