Mercurial > sdl-ios-xcode

comparison src/haptic/SDL_haptic.c @ 2472:3f73c88c9abb gsoc2008_force_feedback

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
First commit of the SDL_haptic subsystem. Code compiles and works, very limited functionality (linux only).
author Edgar Simo <bobbens@gmail.com>
date Sun, 01 Jun 2008 11:44:25 +0000
parents
children 3f80bf1528b4
comparison
equal deleted inserted replaced
2471:910af9032c73 2472:3f73c88c9abb
1 /*
2 SDL - Simple DirectMedia Layer
3 Copyright (C) 2008 Edgar Simo
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 #include "SDL_haptic_c.h"
25 #include "SDL_syshaptic.h"
26
27
28 static Uint8 SDL_numhaptics = 0;
29 SDL_Haptic **SDL_haptics = NULL;
30 static SDL_Haptic *default_haptic = NULL;
31
32
33 /*
34 * Initializes the Haptic devices.
35 */
36 int
37 SDL_HapticInit(void)
38 {
39 int arraylen;
40 int status;
41
42 SDL_numhaptics = 0;
43 status = SDL_SYS_HapticInit();
44 if (status >= 0) {
45 arraylen = (status + 1) * sizeof(*SDL_haptics);
46 SDL_haptics = (SDL_Haptic **) SDL_malloc(arraylen);
47 if (SDL_haptics == NULL) {
48 SDL_numhaptics = 0;
49 } else {
50 SDL_memset(SDL_haptics, 0, arraylen);
51 SDL_numhaptics = status;
52 }
53 status = 0;
54 }
55 default_haptic = NULL;
56
57 return status;
58 }
59
60
61 /*
62 * Returns the number of available devices.
63 */
64 int
65 SDL_NumHaptics(void)
66 {
67 return SDL_numhaptics;
68 }
69
70
71 /*
72 * Gets the name of a Haptic device by index.
73 */
74 const char *
75 SDL_HapticName(int device_index)
76 {
77 if ((device_index < 0) || (device_index >= SDL_numhaptics)) {
78 SDL_SetError("There are %d haptic devices available", SDL_numhaptics);
79 return NULL;
80 }
81 return SDL_SYS_HapticName(device_index);
82 }
83
84
85 /*
86 * Opens a Haptic device
87 */
88 SDL_Haptic *
89 SDL_HapticOpen(int device_index)
90 {
91 int i;
92 SDL_Haptic *haptic;
93
94 if ((device_index < 0) || (device_index >= SDL_numhaptics)) {
95 SDL_SetError("There are %d haptic devices available", SDL_numhaptics);
96 return NULL;
97 }
98
99 /* If the haptic is already open, return it */
100 for (i = 0; SDL_haptics[i]; ++i) {
101 if (device_index == SDL_haptics[i]->index) {
102 haptic = SDL_haptics[i];
103 ++haptic->ref_count;
104 return haptic;
105 }
106 }
107
108 /* Create and initialize the haptic */
109 haptic = (SDL_Haptic *) SDL_malloc((sizeof *haptic));
110 if (haptic != NULL) {
111 SDL_memset(haptic, 0, (sizeof *haptic));
112 haptic->index = device_index;
113 if (SDL_SYS_HapticOpen(haptic) < 0) {
114 SDL_free(haptic);
115 haptic = NULL;
116 } else {
117 }
118 }
119 if (haptic) {
120 /* Add haptic to list */
121 ++haptic->ref_count;
122 for (i = 0; SDL_haptics[i]; ++i)
123 /* Skip to next haptic */ ;
124 SDL_haptics[i] = haptic;
125 }
126 return haptic;
127 }