annotate src/haptic/linux/SDL_syshaptic.c @ 2481:5d0ea4576f20 gsoc2008_force_feedback

More comments. Clamped values in struct ff_effect. Added waveforms.
author Edgar Simo <bobbens@gmail.com>
date Tue, 01 Jul 2008 10:44:42 +0000
parents b883974445fc
children b51ad78812d5
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 2008 Edgar Simo
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4
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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
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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.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Lesser General Public License for more details.
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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
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22 #include "SDL_config.h"
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23
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24 #ifdef SDL_JOYSTICK_LINUX
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25
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26 #include "SDL_haptic.h"
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27 #include "../SDL_haptic_c.h"
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28 #include "../SDL_syshaptic.h"
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29
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30 #include <unistd.h> /* close */
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31 #include <linux/input.h>
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32 #include <sys/ioctl.h>
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33 #include <sys/types.h>
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34 #include <sys/stat.h>
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35 #include <fcntl.h>
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36 #include <linux/limits.h>
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37 #include <string.h>
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38 #include <errno.h>
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39
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40
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41 #define MAX_HAPTICS 32
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42
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43
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44 /*
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45 * List of available haptic devices.
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46 */
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47 static struct
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48 {
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49 char *fname;
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50 SDL_Haptic *haptic;
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51 } SDL_hapticlist[MAX_HAPTICS];
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52
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53
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54 /*
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55 * Haptic system hardware data.
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56 */
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57 struct haptic_hwdata
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58 {
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59 int fd;
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60 };
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61
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62
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63 /*
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64 * Haptic system effect data.
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65 */
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66 struct haptic_hweffect
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67 {
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68 struct ff_effect effect;
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69 };
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70
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71
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72
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73 #define test_bit(nr, addr) \
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74 (((1UL << ((nr) & 31)) & (((const unsigned int *) addr)[(nr) >> 5])) != 0)
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75 #define EV_TEST(ev,f) \
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76 if (test_bit((ev), features)) ret |= (f);
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77 /*
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78 * Test whether a device has haptic properties.
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79 * Returns available properties or 0 if there are none.
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80 */
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81 static int
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82 EV_IsHaptic(int fd)
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83 {
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84 unsigned int ret;
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85 unsigned long features[1 + FF_MAX/sizeof(unsigned long)];
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86
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87 ret = 0;
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88
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89 ioctl(fd, EVIOCGBIT(EV_FF, sizeof(unsigned long) * 4), features);
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90
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91 EV_TEST(FF_CONSTANT, SDL_HAPTIC_CONSTANT);
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92 EV_TEST(FF_PERIODIC, SDL_HAPTIC_PERIODIC);
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93 EV_TEST(FF_RAMP, SDL_HAPTIC_RAMP);
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94 EV_TEST(FF_SPRING, SDL_HAPTIC_SPRING);
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95 EV_TEST(FF_FRICTION, SDL_HAPTIC_FRICTION);
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96 EV_TEST(FF_DAMPER, SDL_HAPTIC_DAMPER);
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97 EV_TEST(FF_RUMBLE, SDL_HAPTIC_RUMBLE);
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98 EV_TEST(FF_INERTIA, SDL_HAPTIC_INERTIA);
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99 EV_TEST(FF_GAIN, SDL_HAPTIC_GAIN);
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100 EV_TEST(FF_AUTOCENTER, SDL_HAPTIC_AUTOCENTER);
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101
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102 return ret;
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103 }
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104
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105 int
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106 SDL_SYS_HapticInit(void)
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107 {
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108 const char joydev_pattern[] = "/dev/input/event%d";
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109 dev_t dev_nums[MAX_HAPTICS];
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110 char path[PATH_MAX];
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111 struct stat sb;
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112 int fd;
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113 int i, j, k;
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114 int duplicate;
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115 int numhaptics;
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116
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117 numhaptics = 0;
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118
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119 i = 0;
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120 for (j = 0; j < MAX_HAPTICS; ++j) {
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121
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122 snprintf(path, PATH_MAX, joydev_pattern, i++);
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123
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124 /* check to see if file exists */
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125 if (stat(path,&sb) != 0)
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126 break;
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127
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128 /* check for duplicates */
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129 duplicate = 0;
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130 for (k = 0; (k < numhaptics) && !duplicate; ++k) {
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131 if (sb.st_rdev == dev_nums[k]) {
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132 duplicate = 1;
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133 }
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134 }
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135 if (duplicate) {
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136 continue;
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137 }
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138
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139 /* try to open */
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140 fd = open(path, O_RDWR, 0);
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141 if (fd < 0) continue;
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142
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143 #ifdef DEBUG_INPUT_EVENTS
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144 printf("Checking %s\n", path);
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145 #endif
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146
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147 /* see if it works */
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148 if (EV_IsHaptic(fd)!=0) {
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149 SDL_hapticlist[numhaptics].fname = SDL_strdup(path);
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150 SDL_hapticlist[numhaptics].haptic = NULL;
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151 dev_nums[numhaptics] = sb.st_rdev;
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152 ++numhaptics;
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153 }
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154 close(fd);
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155 }
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156
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157 return numhaptics;
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158 }
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159
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160
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161 /*
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162 * Return the name of a haptic device, does not need to be opened.
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163 */
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164 const char *
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165 SDL_SYS_HapticName(int index)
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166 {
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167 int fd;
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168 static char namebuf[128];
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169 char *name;
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170
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171 name = NULL;
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172 fd = open(SDL_hapticlist[index].fname, O_RDONLY, 0);
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173 if (fd >= 0) {
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174 if (ioctl(fd, EVIOCGNAME(sizeof(namebuf)), namebuf) <= 0) {
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175 name = SDL_hapticlist[index].fname;
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176 }
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177 else {
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178 name = namebuf;
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179 }
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180 }
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181 close(fd);
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182
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183 return name;
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184 }
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185
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186
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187 /*
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188 * Opens a haptic device for usage.
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189 */
2472
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190 int
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191 SDL_SYS_HapticOpen(SDL_Haptic * haptic)
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192 {
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193 int i;
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194 int fd;
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195
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196 /* Open the character device */
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197 fd = open(SDL_hapticlist[haptic->index].fname, O_RDWR, 0);
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198 if (fd < 0) {
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199 SDL_SetError("Unable to open %s\n", SDL_hapticlist[haptic->index]);
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200 return -1;
2472
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201 }
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202
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242d8a668ebb * Implemented opening and closing of haptic devices.
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diff changeset
203 /* Allocate the hwdata */
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diff changeset
204 haptic->hwdata = (struct haptic_hwdata *)
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205 SDL_malloc(sizeof(*haptic->hwdata));
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206 if (haptic->hwdata == NULL) {
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diff changeset
207 SDL_OutOfMemory();
2477
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208 goto open_err;
2476
242d8a668ebb * Implemented opening and closing of haptic devices.
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209 }
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diff changeset
210 SDL_memset(haptic->hwdata, 0, sizeof(*haptic->hwdata));
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211 /* Set the data */
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242d8a668ebb * Implemented opening and closing of haptic devices.
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diff changeset
212 haptic->hwdata->fd = fd;
2478
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213 haptic->supported = EV_IsHaptic(fd);
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214
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215 /* Set the effects */
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diff changeset
216 if (ioctl(fd, EVIOCGEFFECTS, &haptic->neffects) < 0) {
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217 SDL_SetError("Unable to query haptic device memory.");
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diff changeset
218 goto open_err;
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diff changeset
219 }
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diff changeset
220 haptic->effects = (struct haptic_effect *)
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diff changeset
221 SDL_malloc(sizeof(struct haptic_effect) * haptic->neffects);
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diff changeset
222 if (haptic->effects == NULL) {
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parents: 2476
diff changeset
223 SDL_OutOfMemory();
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parents: 2476
diff changeset
224 goto open_err;
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parents: 2476
diff changeset
225 }
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parents: 2476
diff changeset
226
2472
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diff changeset
227 return 0;
2477
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parents: 2476
diff changeset
228
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diff changeset
229 /* Error handling */
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diff changeset
230 open_err:
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diff changeset
231 close(fd);
97f75ea43a93 Starting to add infrastructure to handle haptic effects.
Edgar Simo <bobbens@gmail.com>
parents: 2476
diff changeset
232 if (haptic->hwdata != NULL) {
97f75ea43a93 Starting to add infrastructure to handle haptic effects.
Edgar Simo <bobbens@gmail.com>
parents: 2476
diff changeset
233 free(haptic->hwdata);
97f75ea43a93 Starting to add infrastructure to handle haptic effects.
Edgar Simo <bobbens@gmail.com>
parents: 2476
diff changeset
234 haptic->hwdata = NULL;
97f75ea43a93 Starting to add infrastructure to handle haptic effects.
Edgar Simo <bobbens@gmail.com>
parents: 2476
diff changeset
235 }
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parents: 2476
diff changeset
236 return -1;
2472
3f73c88c9abb First commit of the SDL_haptic subsystem.
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parents:
diff changeset
237 }
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parents:
diff changeset
238
3f73c88c9abb First commit of the SDL_haptic subsystem.
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parents:
diff changeset
239
2475
4b874e3a3a2c Some code cleanup.
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parents: 2474
diff changeset
240 /*
4b874e3a3a2c Some code cleanup.
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parents: 2474
diff changeset
241 * Closes the haptic device.
4b874e3a3a2c Some code cleanup.
Edgar Simo <bobbens@gmail.com>
parents: 2474
diff changeset
242 */
4b874e3a3a2c Some code cleanup.
Edgar Simo <bobbens@gmail.com>
parents: 2474
diff changeset
243 void
4b874e3a3a2c Some code cleanup.
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parents: 2474
diff changeset
244 SDL_SYS_HapticClose(SDL_Haptic * haptic)
4b874e3a3a2c Some code cleanup.
Edgar Simo <bobbens@gmail.com>
parents: 2474
diff changeset
245 {
2476
242d8a668ebb * Implemented opening and closing of haptic devices.
Edgar Simo <bobbens@gmail.com>
parents: 2475
diff changeset
246 if (haptic->hwdata) {
242d8a668ebb * Implemented opening and closing of haptic devices.
Edgar Simo <bobbens@gmail.com>
parents: 2475
diff changeset
247
242d8a668ebb * Implemented opening and closing of haptic devices.
Edgar Simo <bobbens@gmail.com>
parents: 2475
diff changeset
248 /* Clean up */
242d8a668ebb * Implemented opening and closing of haptic devices.
Edgar Simo <bobbens@gmail.com>
parents: 2475
diff changeset
249 close(haptic->hwdata->fd);
242d8a668ebb * Implemented opening and closing of haptic devices.
Edgar Simo <bobbens@gmail.com>
parents: 2475
diff changeset
250
242d8a668ebb * Implemented opening and closing of haptic devices.
Edgar Simo <bobbens@gmail.com>
parents: 2475
diff changeset
251 /* Free */
242d8a668ebb * Implemented opening and closing of haptic devices.
Edgar Simo <bobbens@gmail.com>
parents: 2475
diff changeset
252 SDL_free(haptic->hwdata);
242d8a668ebb * Implemented opening and closing of haptic devices.
Edgar Simo <bobbens@gmail.com>
parents: 2475
diff changeset
253 haptic->hwdata = NULL;
2477
97f75ea43a93 Starting to add infrastructure to handle haptic effects.
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parents: 2476
diff changeset
254 SDL_free(haptic->effects);
97f75ea43a93 Starting to add infrastructure to handle haptic effects.
Edgar Simo <bobbens@gmail.com>
parents: 2476
diff changeset
255 haptic->neffects = 0;
2476
242d8a668ebb * Implemented opening and closing of haptic devices.
Edgar Simo <bobbens@gmail.com>
parents: 2475
diff changeset
256 }
2475
4b874e3a3a2c Some code cleanup.
Edgar Simo <bobbens@gmail.com>
parents: 2474
diff changeset
257 }
4b874e3a3a2c Some code cleanup.
Edgar Simo <bobbens@gmail.com>
parents: 2474
diff changeset
258
4b874e3a3a2c Some code cleanup.
Edgar Simo <bobbens@gmail.com>
parents: 2474
diff changeset
259
2477
97f75ea43a93 Starting to add infrastructure to handle haptic effects.
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parents: 2476
diff changeset
260 /*
97f75ea43a93 Starting to add infrastructure to handle haptic effects.
Edgar Simo <bobbens@gmail.com>
parents: 2476
diff changeset
261 * Clean up after system specific haptic stuff
97f75ea43a93 Starting to add infrastructure to handle haptic effects.
Edgar Simo <bobbens@gmail.com>
parents: 2476
diff changeset
262 */
2474
3f80bf1528b4 Properly quit the SDL_haptic subsystem.
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parents: 2472
diff changeset
263 void
3f80bf1528b4 Properly quit the SDL_haptic subsystem.
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parents: 2472
diff changeset
264 SDL_SYS_HapticQuit(void)
3f80bf1528b4 Properly quit the SDL_haptic subsystem.
Edgar Simo <bobbens@gmail.com>
parents: 2472
diff changeset
265 {
3f80bf1528b4 Properly quit the SDL_haptic subsystem.
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parents: 2472
diff changeset
266 int i;
3f80bf1528b4 Properly quit the SDL_haptic subsystem.
Edgar Simo <bobbens@gmail.com>
parents: 2472
diff changeset
267
3f80bf1528b4 Properly quit the SDL_haptic subsystem.
Edgar Simo <bobbens@gmail.com>
parents: 2472
diff changeset
268 for (i=0; SDL_hapticlist[i].fname != NULL; i++) {
3f80bf1528b4 Properly quit the SDL_haptic subsystem.
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parents: 2472
diff changeset
269 SDL_free(SDL_hapticlist[i].fname);
3f80bf1528b4 Properly quit the SDL_haptic subsystem.
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parents: 2472
diff changeset
270 }
3f80bf1528b4 Properly quit the SDL_haptic subsystem.
Edgar Simo <bobbens@gmail.com>
parents: 2472
diff changeset
271 SDL_hapticlist[0].fname = NULL;
3f80bf1528b4 Properly quit the SDL_haptic subsystem.
Edgar Simo <bobbens@gmail.com>
parents: 2472
diff changeset
272 }
3f80bf1528b4 Properly quit the SDL_haptic subsystem.
Edgar Simo <bobbens@gmail.com>
parents: 2472
diff changeset
273
2481
5d0ea4576f20 More comments.
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parents: 2480
diff changeset
274 #define CLAMP(x) (((x) > 32767) ? 32767 : x)
2477
97f75ea43a93 Starting to add infrastructure to handle haptic effects.
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parents: 2476
diff changeset
275 /*
2479
b9eb2cfe16cd Added some preliminary support for haptic effect control.
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parents: 2478
diff changeset
276 * Initializes the linux effect struct from a haptic_effect.
2481
5d0ea4576f20 More comments.
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parents: 2480
diff changeset
277 * Values above 32767 (for unsigned) are unspecified so we must clamp.
2479
b9eb2cfe16cd Added some preliminary support for haptic effect control.
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parents: 2478
diff changeset
278 */
b9eb2cfe16cd Added some preliminary support for haptic effect control.
Edgar Simo <bobbens@gmail.com>
parents: 2478
diff changeset
279 static int
2480
b883974445fc Some more error reporting.
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parents: 2479
diff changeset
280 SDL_SYS_ToFFEffect( struct ff_effect * dest, SDL_HapticEffect * src )
2479
b9eb2cfe16cd Added some preliminary support for haptic effect control.
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parents: 2478
diff changeset
281 {
2480
b883974445fc Some more error reporting.
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parents: 2479
diff changeset
282 SDL_HapticConstant *constant;
b883974445fc Some more error reporting.
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parents: 2479
diff changeset
283 SDL_HapticPeriodic *periodic;
b883974445fc Some more error reporting.
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parents: 2479
diff changeset
284
b883974445fc Some more error reporting.
Edgar Simo <bobbens@gmail.com>
parents: 2479
diff changeset
285 /* Clear up */
2479
b9eb2cfe16cd Added some preliminary support for haptic effect control.
Edgar Simo <bobbens@gmail.com>
parents: 2478
diff changeset
286 SDL_memset(dest, 0, sizeof(struct ff_effect));
2480
b883974445fc Some more error reporting.
Edgar Simo <bobbens@gmail.com>
parents: 2479
diff changeset
287
b883974445fc Some more error reporting.
Edgar Simo <bobbens@gmail.com>
parents: 2479
diff changeset
288 switch (src->type) {
2479
b9eb2cfe16cd Added some preliminary support for haptic effect control.
Edgar Simo <bobbens@gmail.com>
parents: 2478
diff changeset
289 case SDL_HAPTIC_CONSTANT:
2480
b883974445fc Some more error reporting.
Edgar Simo <bobbens@gmail.com>
parents: 2479
diff changeset
290 constant = &src->constant;
b883974445fc Some more error reporting.
Edgar Simo <bobbens@gmail.com>
parents: 2479
diff changeset
291
b883974445fc Some more error reporting.
Edgar Simo <bobbens@gmail.com>
parents: 2479
diff changeset
292 /* Header */
2479
b9eb2cfe16cd Added some preliminary support for haptic effect control.
Edgar Simo <bobbens@gmail.com>
parents: 2478
diff changeset
293 dest->type = FF_CONSTANT;
2481
5d0ea4576f20 More comments.
Edgar Simo <bobbens@gmail.com>
parents: 2480
diff changeset
294 dest->direction = CLAMP(constant->direction);
2480
b883974445fc Some more error reporting.
Edgar Simo <bobbens@gmail.com>
parents: 2479
diff changeset
295
b883974445fc Some more error reporting.
Edgar Simo <bobbens@gmail.com>
parents: 2479
diff changeset
296 /* Replay */
2481
5d0ea4576f20 More comments.
Edgar Simo <bobbens@gmail.com>
parents: 2480
diff changeset
297 dest->replay.length = CLAMP(constant->length);
5d0ea4576f20 More comments.
Edgar Simo <bobbens@gmail.com>
parents: 2480
diff changeset
298 dest->replay.delay = CLAMP(constant->delay);
2480
b883974445fc Some more error reporting.
Edgar Simo <bobbens@gmail.com>
parents: 2479
diff changeset
299
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300 /* Trigger */
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301 dest->trigger.button = CLAMP(constant->button);
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302 dest->trigger.interval = CLAMP(constant->interval);
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303
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304 /* Constant */
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305 dest->u.constant.level = constant->level;
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306
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307 /* Envelope */
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308 dest->u.constant.envelope.attack_length = CLAMP(constant->attack_length);
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309 dest->u.constant.envelope.attack_level = CLAMP(constant->attack_level);
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310 dest->u.constant.envelope.fade_length = CLAMP(constant->fade_length);
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311 dest->u.constant.envelope.fade_level = CLAMP(constant->fade_level);
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312
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313 break;
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314
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315 case SDL_HAPTIC_PERIODIC:
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316 periodic = &src->periodic;
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317
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318 /* Header */
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319 dest->type = FF_PERIODIC;
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320 dest->direction = CLAMP(periodic->direction);
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321
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322 /* Replay */
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323 dest->replay.length = CLAMP(periodic->length);
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324 dest->replay.delay = CLAMP(periodic->delay);
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325
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326 /* Trigger */
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327 dest->trigger.button = CLAMP(periodic->button);
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328 dest->trigger.interval = CLAMP(periodic->interval);
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329
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330 /* Constant */
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331 switch (periodic->waveform) {
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332 case SDL_WAVEFORM_SINE:
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333 dest->u.periodic.waveform = FF_SINE;
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334 break;
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335 case SDL_WAVEFORM_SQUARE:
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336 dest->u.periodic.waveform = FF_SQUARE;
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337 break;
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338 case SDL_WAVEFORM_TRIANGLE:
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339 dest->u.periodic.waveform = FF_TRIANGLE;
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340 break;
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341 case SDL_WAVEFORM_SAWTOOTHUP:
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342 dest->u.periodic.waveform = FF_SAW_UP;
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343 break;
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344 case SDL_WAVEFORM_SAWTOOTHDOWN:
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345 dest->u.periodic.waveform = FF_SAW_DOWN;
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346 break;
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diff changeset
347
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348 default:
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349 SDL_SetError("Unknown waveform.");
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350 return -1;
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351 }
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352 dest->u.periodic.period = CLAMP(periodic->period);
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353 dest->u.periodic.magnitude = periodic->magnitude;
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354 dest->u.periodic.offset = periodic->offset;
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355 dest->u.periodic.phase = CLAMP(periodic->phase);
2480
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356
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357 /* Envelope */
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358 dest->u.periodic.envelope.attack_length = CLAMP(periodic->attack_length);
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359 dest->u.periodic.envelope.attack_level = CLAMP(periodic->attack_level);
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360 dest->u.periodic.envelope.fade_length = CLAMP(periodic->fade_length);
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diff changeset
361 dest->u.periodic.envelope.fade_level = CLAMP(periodic->fade_level);
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362
b9eb2cfe16cd Added some preliminary support for haptic effect control.
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363 break;
b9eb2cfe16cd Added some preliminary support for haptic effect control.
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364
b9eb2cfe16cd Added some preliminary support for haptic effect control.
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365 default:
b9eb2cfe16cd Added some preliminary support for haptic effect control.
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366 SDL_SetError("Unknown haptic effect type.");
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367 return -1;
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368 }
b9eb2cfe16cd Added some preliminary support for haptic effect control.
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diff changeset
369
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370 return 0;
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371 }
b9eb2cfe16cd Added some preliminary support for haptic effect control.
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372
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373 /*
2477
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374 * Creates a new haptic effect.
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375 */
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376 int
2480
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377 SDL_SYS_HapticNewEffect(SDL_Haptic * haptic, struct haptic_effect * effect,
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378 SDL_HapticEffect * base)
2477
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379 {
2480
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380 struct ff_effect * linux_effect;
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381
2479
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382 /* Allocate the hardware effect */
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383 effect->hweffect = (struct haptic_hweffect *)
b9eb2cfe16cd Added some preliminary support for haptic effect control.
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384 SDL_malloc(sizeof(struct haptic_hweffect));
b9eb2cfe16cd Added some preliminary support for haptic effect control.
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385 if (effect->hweffect == NULL) {
b9eb2cfe16cd Added some preliminary support for haptic effect control.
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diff changeset
386 SDL_OutOfMemory();
b9eb2cfe16cd Added some preliminary support for haptic effect control.
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387 return -1;
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diff changeset
388 }
b9eb2cfe16cd Added some preliminary support for haptic effect control.
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diff changeset
389
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diff changeset
390 /* Prepare the ff_effect */
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391 linux_effect = &effect->hweffect->effect;
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diff changeset
392 if (SDL_SYS_ToFFEffect( linux_effect, base ) != 0) {
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b9eb2cfe16cd Added some preliminary support for haptic effect control.
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393 return -1;
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diff changeset
394 }
2480
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diff changeset
395 linux_effect->id = -1; /* Have the kernel give it an id */
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diff changeset
396
b9eb2cfe16cd Added some preliminary support for haptic effect control.
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diff changeset
397 /* Upload the effect */
2480
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diff changeset
398 if (ioctl(haptic->hwdata->fd, EVIOCSFF, linux_effect) < 0) {
b883974445fc Some more error reporting.
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diff changeset
399 SDL_SetError("Error uploading effect to the haptic device: %s",
b883974445fc Some more error reporting.
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diff changeset
400 strerror(errno));
2479
b9eb2cfe16cd Added some preliminary support for haptic effect control.
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diff changeset
401 return -1;
b9eb2cfe16cd Added some preliminary support for haptic effect control.
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diff changeset
402 }
b9eb2cfe16cd Added some preliminary support for haptic effect control.
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diff changeset
403
b9eb2cfe16cd Added some preliminary support for haptic effect control.
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parents: 2478
diff changeset
404 return 0;
b9eb2cfe16cd Added some preliminary support for haptic effect control.
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parents: 2478
diff changeset
405 }
b9eb2cfe16cd Added some preliminary support for haptic effect control.
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parents: 2478
diff changeset
406
b9eb2cfe16cd Added some preliminary support for haptic effect control.
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parents: 2478
diff changeset
407
b9eb2cfe16cd Added some preliminary support for haptic effect control.
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parents: 2478
diff changeset
408 /*
b9eb2cfe16cd Added some preliminary support for haptic effect control.
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diff changeset
409 * Runs an effect.
b9eb2cfe16cd Added some preliminary support for haptic effect control.
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diff changeset
410 */
b9eb2cfe16cd Added some preliminary support for haptic effect control.
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diff changeset
411 int
b9eb2cfe16cd Added some preliminary support for haptic effect control.
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diff changeset
412 SDL_SYS_HapticRunEffect(SDL_Haptic * haptic, struct haptic_effect * effect)
b9eb2cfe16cd Added some preliminary support for haptic effect control.
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diff changeset
413 {
b9eb2cfe16cd Added some preliminary support for haptic effect control.
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diff changeset
414 struct input_event run;
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parents: 2478
diff changeset
415
b9eb2cfe16cd Added some preliminary support for haptic effect control.
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parents: 2478
diff changeset
416 /* Prepare to run the effect */
b9eb2cfe16cd Added some preliminary support for haptic effect control.
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parents: 2478
diff changeset
417 run.type = EV_FF;
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diff changeset
418 run.code = effect->hweffect->effect.id;
b9eb2cfe16cd Added some preliminary support for haptic effect control.
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diff changeset
419 run.value = 1;
b9eb2cfe16cd Added some preliminary support for haptic effect control.
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parents: 2478
diff changeset
420
b9eb2cfe16cd Added some preliminary support for haptic effect control.
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parents: 2478
diff changeset
421 if (write(haptic->hwdata->fd, (const void*) &run, sizeof(run)) < 0) {
b9eb2cfe16cd Added some preliminary support for haptic effect control.
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parents: 2478
diff changeset
422 SDL_SetError("Unable to run the haptic effect.");
b9eb2cfe16cd Added some preliminary support for haptic effect control.
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diff changeset
423 return -1;
b9eb2cfe16cd Added some preliminary support for haptic effect control.
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parents: 2478
diff changeset
424 }
b9eb2cfe16cd Added some preliminary support for haptic effect control.
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parents: 2478
diff changeset
425
b9eb2cfe16cd Added some preliminary support for haptic effect control.
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parents: 2478
diff changeset
426 return 0;
b9eb2cfe16cd Added some preliminary support for haptic effect control.
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parents: 2478
diff changeset
427 }
b9eb2cfe16cd Added some preliminary support for haptic effect control.
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parents: 2478
diff changeset
428
b9eb2cfe16cd Added some preliminary support for haptic effect control.
Edgar Simo <bobbens@gmail.com>
parents: 2478
diff changeset
429
b9eb2cfe16cd Added some preliminary support for haptic effect control.
Edgar Simo <bobbens@gmail.com>
parents: 2478
diff changeset
430 /*
b9eb2cfe16cd Added some preliminary support for haptic effect control.
Edgar Simo <bobbens@gmail.com>
parents: 2478
diff changeset
431 * Frees the effect
b9eb2cfe16cd Added some preliminary support for haptic effect control.
Edgar Simo <bobbens@gmail.com>
parents: 2478
diff changeset
432 */
b9eb2cfe16cd Added some preliminary support for haptic effect control.
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parents: 2478
diff changeset
433 void
b9eb2cfe16cd Added some preliminary support for haptic effect control.
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parents: 2478
diff changeset
434 SDL_SYS_HapticDestroyEffect(SDL_Haptic * haptic, struct haptic_effect * effect)
b9eb2cfe16cd Added some preliminary support for haptic effect control.
Edgar Simo <bobbens@gmail.com>
parents: 2478
diff changeset
435 {
b9eb2cfe16cd Added some preliminary support for haptic effect control.
Edgar Simo <bobbens@gmail.com>
parents: 2478
diff changeset
436 if (ioctl(haptic->hwdata->fd, EVIOCRMFF, effect->hweffect->effect.id) < 0) {
b9eb2cfe16cd Added some preliminary support for haptic effect control.
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parents: 2478
diff changeset
437 SDL_SetError("Error removing the effect from the haptic device.");
b9eb2cfe16cd Added some preliminary support for haptic effect control.
Edgar Simo <bobbens@gmail.com>
parents: 2478
diff changeset
438 }
b9eb2cfe16cd Added some preliminary support for haptic effect control.
Edgar Simo <bobbens@gmail.com>
parents: 2478
diff changeset
439 SDL_free(effect->hweffect);
b9eb2cfe16cd Added some preliminary support for haptic effect control.
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parents: 2478
diff changeset
440 effect->hweffect = NULL;
2477
97f75ea43a93 Starting to add infrastructure to handle haptic effects.
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parents: 2476
diff changeset
441 }
97f75ea43a93 Starting to add infrastructure to handle haptic effects.
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parents: 2476
diff changeset
442
2474
3f80bf1528b4 Properly quit the SDL_haptic subsystem.
Edgar Simo <bobbens@gmail.com>
parents: 2472
diff changeset
443
2472
3f73c88c9abb First commit of the SDL_haptic subsystem.
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parents:
diff changeset
444 #endif /* SDL_HAPTIC_LINUX */