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annotate src/joystick/macos/SDL_sysjoystick.c @ 1662:782fd950bd46 SDL-1.3

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Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. WARNING: None of the video drivers have been updated for the new API yet! The API is still under design and very fluid. The code is now run through a consistent indent format: indent -i4 -nut -nsc -br -ce The headers are being converted to automatically generate doxygen documentation.
author Sam Lantinga <slouken@libsdl.org>
date Sun, 28 May 2006 13:04:16 +0000
parents 92947e3a18db
children 4da1ee79c9af
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2006 Sam Lantinga
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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_MACOS
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25
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26 /* SDL stuff -- "SDL_sysjoystick.c"
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27 MacOS joystick functions by Frederick Reitberger
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28
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29 The code that follows is meant for SDL. Use at your own risk.
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30 */
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31
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32 #include <InputSprocket.h>
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33
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34 #include "SDL_joystick.h"
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35 #include "../SDL_sysjoystick.h"
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36 #include "../SDL_joystick_c.h"
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37
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38
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39 /* The max number of joysticks we will detect */
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40 #define MAX_JOYSTICKS 16
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41 /* Limit ourselves to 32 elements per device */
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42 #define kMaxReferences 32
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43
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44 #define ISpSymmetricAxisToFloat(axis) ((((float) axis) - kISpAxisMiddle) / (kISpAxisMaximum-kISpAxisMiddle))
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45 #define ISpAsymmetricAxisToFloat(axis) (((float) axis) / (kISpAxisMaximum))
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46
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47
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48 static ISpDeviceReference SYS_Joysticks[MAX_JOYSTICKS];
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49 static ISpElementListReference SYS_Elements[MAX_JOYSTICKS];
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50 static ISpDeviceDefinition SYS_DevDef[MAX_JOYSTICKS];
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51
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52 struct joystick_hwdata
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53 {
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54 char name[64];
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55 /* Uint8 id;*/
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56 ISpElementReference refs[kMaxReferences];
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57 /* gonna need some sort of mapping info */
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58 };
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59
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60
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61 /* Function to scan the system for joysticks.
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62 * Joystick 0 should be the system default joystick.
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63 * This function should return the number of available joysticks, or -1
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64 * on an unrecoverable fatal error.
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65 */
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66 int
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67 SDL_SYS_JoystickInit (void)
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68 {
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69 static ISpDeviceClass classes[4] = {
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70 kISpDeviceClass_Joystick,
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71 #if kISpDeviceClass_Gamepad
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72 kISpDeviceClass_Gamepad,
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73 #endif
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74 kISpDeviceClass_Wheel,
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75 0
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76 };
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77 OSErr err;
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78 int i;
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79 UInt32 count, numJoysticks;
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80
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81 if ((Ptr) 0 == (Ptr) ISpStartup) {
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82 SDL_SetError ("InputSprocket not installed");
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83 return -1; // InputSprocket not installed
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84 }
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85
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86 if ((Ptr) 0 == (Ptr) ISpGetVersion) {
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87 SDL_SetError ("InputSprocket not version 1.1 or newer");
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88 return -1; // old version of ISp (not at least 1.1)
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89 }
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90
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91 ISpStartup ();
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92
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93 /* Get all the joysticks */
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94 numJoysticks = 0;
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95 for (i = 0; classes[i]; ++i) {
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96 count = 0;
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97 err = ISpDevices_ExtractByClass (classes[i],
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98 MAX_JOYSTICKS - numJoysticks,
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99 &count,
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100 &SYS_Joysticks[numJoysticks]);
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101 numJoysticks += count;
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102 }
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103
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104 for (i = 0; i < numJoysticks; i++) {
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105 ISpDevice_GetDefinition (SYS_Joysticks[i],
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106 sizeof (ISpDeviceDefinition),
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107 &SYS_DevDef[i]);
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108
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109 err = ISpElementList_New (0, NULL, &SYS_Elements[i], 0);
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110
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111 if (err) {
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112 SDL_OutOfMemory ();
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113 return -1;
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114 }
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115
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116 ISpDevice_GetElementList (SYS_Joysticks[i], &SYS_Elements[i]);
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117 }
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118
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119 ISpDevices_Deactivate (numJoysticks, SYS_Joysticks);
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120
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121 return numJoysticks;
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122 }
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123
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124 /* Function to get the device-dependent name of a joystick */
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125 const char *
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126 SDL_SYS_JoystickName (int index)
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127 {
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128 static char name[64];
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129 int len;
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130
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131 /* convert pascal string to c-string */
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132 len = SYS_DevDef[index].deviceName[0];
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133 if (len >= sizeof (name)) {
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134 len = (sizeof (name) - 1);
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135 }
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136 SDL_memcpy (name, &SYS_DevDef[index].deviceName[1], len);
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137 name[len] = '\0';
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138
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139 return name;
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140 }
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141
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142 /* Function to open a joystick for use.
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143 The joystick to open is specified by the index field of the joystick.
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144 This should fill the nbuttons and naxes fields of the joystick structure.
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145 It returns 0, or -1 if there is an error.
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146 */
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147 int
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148 SDL_SYS_JoystickOpen (SDL_Joystick * joystick)
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149 {
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150 int index;
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151 UInt32 count, gotCount, count2;
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152 long numAxis, numButtons, numHats, numBalls;
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153
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154 count = kMaxReferences;
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155 count2 = 0;
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156 numAxis = numButtons = numHats = numBalls = 0;
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157
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158 index = joystick->index;
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159
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160 /* allocate memory for system specific hardware data */
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161 joystick->hwdata =
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162 (struct joystick_hwdata *) SDL_malloc (sizeof (*joystick->hwdata));
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163 if (joystick->hwdata == NULL) {
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164 SDL_OutOfMemory ();
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165 return (-1);
0
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166 }
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167 SDL_memset (joystick->hwdata, 0, sizeof (*joystick->hwdata));
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168 SDL_strlcpy (joystick->hwdata->name, SDL_SYS_JoystickName (index),
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169 SDL_arraysize (joystick->hwdata->name));
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170 joystick->name = joystick->hwdata->name;
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171
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172 ISpElementList_ExtractByKind (SYS_Elements[index],
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173 kISpElementKind_Axis,
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174 count, &gotCount, joystick->hwdata->refs);
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175
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176 numAxis = gotCount;
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177 count -= gotCount;
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178 count2 += gotCount;
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179
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180 ISpElementList_ExtractByKind (SYS_Elements[index],
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181 kISpElementKind_DPad,
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182 count,
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183 &gotCount,
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184 &(joystick->hwdata->refs[count2]));
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185
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186 numHats = gotCount;
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187 count -= gotCount;
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188 count2 += gotCount;
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189
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190 ISpElementList_ExtractByKind (SYS_Elements[index],
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191 kISpElementKind_Button,
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192 count,
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193 &gotCount,
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194 &(joystick->hwdata->refs[count2]));
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195
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196 numButtons = gotCount;
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197 count -= gotCount;
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198 count2 += gotCount;
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199
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200 joystick->naxes = numAxis;
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201 joystick->nhats = numHats;
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202 joystick->nballs = numBalls;
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203 joystick->nbuttons = numButtons;
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204
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205 ISpDevices_Activate (1, &SYS_Joysticks[index]);
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206
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207 return 0;
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208 }
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209
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210 /* Function to update the state of a joystick - called as a device poll.
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211 * This function shouldn't update the joystick structure directly,
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212 * but instead should call SDL_PrivateJoystick*() to deliver events
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213 * and update joystick device state.
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214 */
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215 void
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216 SDL_SYS_JoystickUpdate (SDL_Joystick * joystick)
0
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217 {
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218 int i, j;
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219 ISpAxisData a;
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220 ISpDPadData b;
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221 //ISpDeltaData c;
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222 ISpButtonData d;
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223
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224 for (i = 0, j = 0; i < joystick->naxes; i++, j++) {
0
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225 Sint16 value;
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226
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227 ISpElement_GetSimpleState (joystick->hwdata->refs[j], &a);
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228 value = (ISpSymmetricAxisToFloat (a) * 32767.0);
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229 if (value != joystick->axes[i]) {
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230 SDL_PrivateJoystickAxis (joystick, i, value);
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231 }
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232 }
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233
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234 for (i = 0; i < joystick->nhats; i++, j++) {
0
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235 Uint8 pos;
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236
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237 ISpElement_GetSimpleState (joystick->hwdata->refs[j], &b);
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238 switch (b) {
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239 case kISpPadIdle:
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240 pos = SDL_HAT_CENTERED;
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241 break;
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242 case kISpPadLeft:
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243 pos = SDL_HAT_LEFT;
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244 break;
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245 case kISpPadUpLeft:
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246 pos = SDL_HAT_LEFTUP;
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247 break;
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248 case kISpPadUp:
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249 pos = SDL_HAT_UP;
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250 break;
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251 case kISpPadUpRight:
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252 pos = SDL_HAT_RIGHTUP;
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253 break;
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254 case kISpPadRight:
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255 pos = SDL_HAT_RIGHT;
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256 break;
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257 case kISpPadDownRight:
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258 pos = SDL_HAT_RIGHTDOWN;
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259 break;
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260 case kISpPadDown:
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261 pos = SDL_HAT_DOWN;
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262 break;
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263 case kISpPadDownLeft:
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264 pos = SDL_HAT_LEFTDOWN;
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265 break;
0
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266 }
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267 if (pos != joystick->hats[i]) {
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268 SDL_PrivateJoystickHat (joystick, i, pos);
0
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269 }
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270 }
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271
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272 for (i = 0; i < joystick->nballs; i++, j++) {
0
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273 /* ignore balls right now */
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274 }
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275
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276 for (i = 0; i < joystick->nbuttons; i++, j++) {
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277 ISpElement_GetSimpleState (joystick->hwdata->refs[j], &d);
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278 if (d != joystick->buttons[i]) {
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279 SDL_PrivateJoystickButton (joystick, i, d);
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280 }
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281 }
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282 }
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283
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284 /* Function to close a joystick after use */
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285 void
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286 SDL_SYS_JoystickClose (SDL_Joystick * joystick)
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287 {
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288 int index;
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289
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290 index = joystick->index;
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291
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292 ISpDevices_Deactivate (1, &SYS_Joysticks[index]);
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293 }
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294
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295 /* Function to perform any system-specific joystick related cleanup */
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296 void
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297 SDL_SYS_JoystickQuit (void)
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298 {
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299 ISpShutdown ();
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300 }
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301
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302 #endif /* SDL_JOYSTICK_MACOS */
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303 /* vi: set ts=4 sw=4 expandtab: */