SDL_sysjoystick.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
/*
SDL - Simple DirectMedia Layer
Copyright (C) 1997, 1998, 1999, 2000, 2001 Sam Lantinga
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Sam Lantinga
20
slouken@libsdl.org
21
22
23
24
25
26
27
28
29
30
31
32
33
*/
#ifdef SAVE_RCSID
static char rcsid =
"@(#) $Id$";
#endif
/* This is the system specific header for the SDL joystick API */
#include <stdio.h> /* For the definition of NULL */
#include <libraries/lowlevel.h>
34
#if defined(__SASC) || defined(STORMC4_WOS)
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
#include <proto/exec.h>
#include <proto/lowlevel.h>
#include <proto/graphics.h>
#else
#include <inline/exec.h>
#include <inline/lowlevel.h>
#include <inline/graphics.h>
#endif
#include "mydebug.h"
extern struct ExecBase *SysBase;
extern struct GfxBase *GfxBase;
#include <stdlib.h>
#include "SDL_error.h"
#include "SDL_joystick.h"
#include "SDL_sysjoystick.h"
#include "SDL_joystick_c.h"
/* Function to scan the system for joysticks.
* This function should set SDL_numjoysticks to the number of available
* joysticks. Joystick 0 should be the system default joystick.
* It should return 0, or -1 on an unrecoverable fatal error.
*/
/* Amiga specific datas */
struct Library *LowLevelBase=NULL;
ULONG joybut[]=
{
JPF_BUTTON_RED,
JPF_BUTTON_BLUE,
JPF_BUTTON_PLAY,
JPF_BUTTON_YELLOW,
JPF_BUTTON_GREEN,
JPF_BUTTON_FORWARD,
JPF_BUTTON_REVERSE,
};
75
struct joystick_hwdata
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
{
ULONG joystate;
};
int SDL_SYS_JoystickInit(void)
{
if(!LowLevelBase)
{
if(LowLevelBase=OpenLibrary("lowlevel.library",37))
return 2;
}
else
return 2;
D(bug("%ld joysticks available.\n",SDL_numjoysticks));
return 0;
}
/* Function to get the device-dependent name of a joystick */
const char *SDL_SYS_JoystickName(int index)
{
if(index<2&&LowLevelBase)
{
switch(index)
{
case 0:
return "Port 1 Amiga Joystick/Joypad";
case 1:
return "Port 2 Amiga Joystick/Joypad";
}
}
SDL_SetError("No joystick available with that index");
return(NULL);
}
/* Function to open a joystick for use.
The joystick to open is specified by the index field of the joystick.
This should fill the nbuttons and naxes fields of the joystick structure.
It returns 0, or -1 if there is an error.
*/
int SDL_SYS_JoystickOpen(SDL_Joystick *joystick)
{
ULONG temp,i;
D(bug("Opening joystick %ld\n",joystick->index));
if(!(joystick->hwdata=malloc(sizeof(struct joystick_hwdata))))
return -1;
/* This loop is to check if the controller is a joypad */
for(i=0;i<20;i++)
{
131
temp=ReadJoyPort(joystick->index^1); // fix to invert amiga joyports
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
WaitTOF();
}
if((temp&JP_TYPE_MASK)==JP_TYPE_GAMECTLR)
joystick->nbuttons=7;
else
joystick->nbuttons=3;
joystick->nhats=0;
joystick->nballs=0;
joystick->naxes=2;
joystick->hwdata->joystate=0L;
return 0;
}
/* Function to update the state of a joystick - called as a device poll.
* This function shouldn't update the joystick structure directly,
* but instead should call SDL_PrivateJoystick*() to deliver events
* and update joystick device state.
*/
void SDL_SYS_JoystickUpdate(SDL_Joystick *joystick)
{
155
ULONG data;
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
int i;
if(joystick->index<2)
{
data=ReadJoyPort(joystick->index);
if(data&JP_DIRECTION_MASK)
{
if(data&JPF_JOY_DOWN)
{
if(!(joystick->hwdata->joystate&JPF_JOY_DOWN))
SDL_PrivateJoystickAxis(joystick,0,127);
}
else if(data&JPF_JOY_UP)
{
if(!(joystick->hwdata->joystate&JPF_JOY_UP))
SDL_PrivateJoystickAxis(joystick,0,-127);
}
else if(joystick->hwdata->joystate&(JPF_JOY_UP|JPF_JOY_DOWN))
SDL_PrivateJoystickAxis(joystick,0,0);
if(data&JPF_JOY_LEFT)
{
if(!(joystick->hwdata->joystate&JPF_JOY_LEFT))
SDL_PrivateJoystickAxis(joystick,1,-127);
}
else if(data&JPF_JOY_RIGHT)
{
if(!(joystick->hwdata->joystate&JPF_JOY_RIGHT))
SDL_PrivateJoystickAxis(joystick,1,127);
}
else if(joystick->hwdata->joystate&(JPF_JOY_LEFT|JPF_JOY_RIGHT))
SDL_PrivateJoystickAxis(joystick,1,0);
}
else if(joystick->hwdata->joystate&(JPF_JOY_LEFT|JPF_JOY_RIGHT))
{
SDL_PrivateJoystickAxis(joystick,1,0);
}
else if(joystick->hwdata->joystate&(JPF_JOY_UP|JPF_JOY_DOWN))
{
SDL_PrivateJoystickAxis(joystick,0,0);
}
for(i=0;i<joystick->nbuttons;i++)
{
if( (data&joybut[i]) )
{
if(i==1)
data&=(~(joybut[2]));
if(!(joystick->hwdata->joystate&joybut[i]))
SDL_PrivateJoystickButton(joystick,i,SDL_PRESSED);
}
else if(joystick->hwdata->joystate&joybut[i])
SDL_PrivateJoystickButton(joystick,i,SDL_RELEASED);
}
joystick->hwdata->joystate=data;
}
return;
}
/* Function to close a joystick after use */
void SDL_SYS_JoystickClose(SDL_Joystick *joystick)
{
if(joystick->hwdata)
free(joystick->hwdata);
return;
}
/* Function to perform any system-specific joystick related cleanup */
void SDL_SYS_JoystickQuit(void)
{
if(LowLevelBase)
{
CloseLibrary(LowLevelBase);
LowLevelBase=NULL;
SDL_numjoysticks=0;
}
return;
}