Mercurial > sdl-ios-xcode
annotate src/joystick/dc/SDL_sysjoystick.c @ 1551:02e19471a694
Fixed bug #4
[Note: I'm applying this patch since it's a cleaner version of what's already implemented, and supports this controller on older kernels. I'll ask to make sure this doesn't break on the new kernels where it's no longer necessary]
Date: Mon, 21 Mar 2005 09:41:11 -0500
From: Chris Nelson
Subject: SDL Patch
Hey, Ryan.
I submitted the following patch about a year ago. It's just a simple
patch for the linux port, to make multiple joysticks each appear to SDL
as their own device, if they are on the same USB port (specifically,
these guys
<http://www.consoleplus.co.uk/product_info.php?pName=super-joybox-5-quad-joypad-converter>,
which allow 4 Playstation2 controllers to be accessed via a single USB
port). Without this patch, SDL pretty much drops the ball, and reports
that there are 4 joysticks available when less than that number are
plugged in.
My work built upon the work of another person with the same device. When
I submitted the patch to the list, he tested it, but it didn't work for
him, so the patch was never accepted. Maybe about 3 times in the past
year, I've tried to email the guy, to see if he couldn't run my new
version, complete with debug code to diagnose the problem he was having.
He never got back to me.
So, I'm attaching the patch. I wish I knew why it didn't work for him,
but I've been using it for the last year with no problems. Let me know
if you need any more information, or have any ideas as to how I could
test it. I'd like to see it in the tree, but I want to make sure it works.
-Chris
author | Sam Lantinga <slouken@libsdl.org> |
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date | Sun, 19 Mar 2006 06:31:34 +0000 (2006-03-19) |
parents | 11134dc42da8 |
children | 92947e3a18db |
rev | line source |
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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 #include "SDL_events.h" |
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25 #include "SDL_joystick.h" |
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26 #include "../SDL_sysjoystick.h" |
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27 #include "../SDL_joystick_c.h" |
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28 |
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29 #include <dc/maple.h> |
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30 #include <dc/maple/controller.h> |
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31 |
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32 #define MAX_JOYSTICKS 8 /* only 2 are supported in the multimedia API */ |
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33 #define MAX_AXES 6 /* each joystick can have up to 6 axes */ |
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34 #define MAX_BUTTONS 8 /* and 8 buttons */ |
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35 #define MAX_HATS 2 |
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36 |
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37 #define JOYNAMELEN 8 |
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38 |
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39 /* array to hold joystick ID values */ |
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40 static uint8 SYS_Joystick_addr[MAX_JOYSTICKS]; |
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41 |
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42 /* The private structure used to keep track of a joystick */ |
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43 struct joystick_hwdata |
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44 { |
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45 cont_cond_t prev_cond; |
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46 int prev_buttons; |
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47 }; |
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48 |
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49 /* Function to scan the system for joysticks. |
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50 * This function should set SDL_numjoysticks to the number of available |
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51 * joysticks. Joystick 0 should be the system default joystick. |
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52 * It should return 0, or -1 on an unrecoverable fatal error. |
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53 */ |
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54 int SDL_SYS_JoystickInit(void) |
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55 { |
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56 int numdevs; |
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57 |
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58 int p,u; |
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59 |
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60 numdevs = 0; |
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61 for(p=0;p<MAPLE_PORT_COUNT;p++) { |
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62 for(u=0;u<MAPLE_UNIT_COUNT;u++) { |
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63 if (maple_device_func(p,u)&MAPLE_FUNC_CONTROLLER) { |
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64 SYS_Joystick_addr[numdevs] = maple_addr(p,u); |
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65 numdevs++; |
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66 } |
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67 } |
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68 } |
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69 |
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70 return(numdevs); |
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71 } |
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72 |
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73 /* Function to get the device-dependent name of a joystick */ |
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74 const char *SDL_SYS_JoystickName(int index) |
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75 { |
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76 maple_device_t *dev; |
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77 if (maple_compat_resolve(SYS_Joystick_addr[index],&dev,MAPLE_FUNC_CONTROLLER)!=0) return NULL; |
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78 return dev->info.product_name; |
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79 } |
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80 |
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81 /* Function to open a joystick for use. |
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82 The joystick to open is specified by the index field of the joystick. |
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83 This should fill the nbuttons and naxes fields of the joystick structure. |
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84 It returns 0, or -1 if there is an error. |
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85 */ |
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86 int SDL_SYS_JoystickOpen(SDL_Joystick *joystick) |
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87 { |
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88 /* allocate memory for system specific hardware data */ |
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89 joystick->hwdata = (struct joystick_hwdata *) SDL_malloc(sizeof(*joystick->hwdata)); |
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90 if (joystick->hwdata == NULL) |
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91 { |
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92 SDL_OutOfMemory(); |
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93 return(-1); |
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94 } |
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95 SDL_memset(joystick->hwdata, 0, sizeof(*joystick->hwdata)); |
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96 |
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97 /* fill nbuttons, naxes, and nhats fields */ |
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98 joystick->nbuttons = MAX_BUTTONS; |
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99 joystick->naxes = MAX_AXES; |
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100 joystick->nhats = MAX_HATS; |
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101 return(0); |
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102 } |
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103 |
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104 |
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105 /* Function to update the state of a joystick - called as a device poll. |
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106 * This function shouldn't update the joystick structure directly, |
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107 * but instead should call SDL_PrivateJoystick*() to deliver events |
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108 * and update joystick device state. |
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109 */ |
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110 |
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111 void SDL_SYS_JoystickUpdate(SDL_Joystick *joystick) |
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112 { |
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113 const int sdl_buttons[] = { |
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114 CONT_C, |
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115 CONT_B, |
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116 CONT_A, |
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117 CONT_START, |
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118 CONT_Z, |
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119 CONT_Y, |
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120 CONT_X, |
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121 CONT_D |
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122 }; |
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123 |
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124 uint8 addr; |
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125 cont_cond_t cond,*prev_cond; |
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126 int buttons,prev_buttons,i,changed; |
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127 |
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128 addr = SYS_Joystick_addr[joystick->index]; |
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129 if (cont_get_cond(addr,&cond)<0) return; |
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130 |
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131 buttons = cond.buttons; |
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132 prev_buttons = joystick->hwdata->prev_buttons; |
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133 changed = buttons^prev_buttons; |
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134 |
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135 if ((changed)&(CONT_DPAD_UP|CONT_DPAD_DOWN|CONT_DPAD_LEFT|CONT_DPAD_RIGHT)) { |
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136 int hat = SDL_HAT_CENTERED; |
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137 if (buttons&CONT_DPAD_UP) hat|=SDL_HAT_UP; |
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138 if (buttons&CONT_DPAD_DOWN) hat|=SDL_HAT_DOWN; |
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139 if (buttons&CONT_DPAD_LEFT) hat|=SDL_HAT_LEFT; |
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140 if (buttons&CONT_DPAD_RIGHT) hat|=SDL_HAT_RIGHT; |
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141 SDL_PrivateJoystickHat(joystick, 0, hat); |
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142 } |
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143 if ((changed)&(CONT_DPAD2_UP|CONT_DPAD2_DOWN|CONT_DPAD2_LEFT|CONT_DPAD2_RIGHT)) { |
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144 int hat = SDL_HAT_CENTERED; |
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145 if (buttons&CONT_DPAD2_UP) hat|=SDL_HAT_UP; |
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146 if (buttons&CONT_DPAD2_DOWN) hat|=SDL_HAT_DOWN; |
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147 if (buttons&CONT_DPAD2_LEFT) hat|=SDL_HAT_LEFT; |
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148 if (buttons&CONT_DPAD2_RIGHT) hat|=SDL_HAT_RIGHT; |
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149 SDL_PrivateJoystickHat(joystick, 1, hat); |
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150 } |
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151 |
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152 for(i=0;i<sizeof(sdl_buttons)/sizeof(sdl_buttons[0]);i++) { |
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153 if (changed & sdl_buttons[i]) { |
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154 SDL_PrivateJoystickButton(joystick, i, (buttons & sdl_buttons[i])?SDL_PRESSED:SDL_RELEASED); |
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155 } |
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156 } |
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157 |
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158 prev_cond = &joystick->hwdata->prev_cond; |
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159 if (cond.joyx!=prev_cond->joyx) |
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160 SDL_PrivateJoystickAxis(joystick, 0, cond.joyx-128); |
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161 if (cond.joyy!=prev_cond->joyy) |
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162 SDL_PrivateJoystickAxis(joystick, 1, cond.joyy-128); |
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163 if (cond.rtrig!=prev_cond->rtrig) |
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164 SDL_PrivateJoystickAxis(joystick, 2, cond.rtrig); |
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165 if (cond.ltrig!=prev_cond->ltrig) |
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166 SDL_PrivateJoystickAxis(joystick, 3, cond.ltrig); |
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167 if (cond.joy2x!=prev_cond->joy2x) |
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168 SDL_PrivateJoystickAxis(joystick, 4, cond.joy2x-128); |
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169 if (cond.joy2y!=prev_cond->joy2y) |
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170 SDL_PrivateJoystickAxis(joystick, 5, cond.joy2y-128); |
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171 |
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172 joystick->hwdata->prev_buttons = buttons; |
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173 joystick->hwdata->prev_cond = cond; |
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174 } |
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175 |
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176 /* Function to close a joystick after use */ |
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177 void SDL_SYS_JoystickClose(SDL_Joystick *joystick) |
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178 { |
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179 if (joystick->hwdata != NULL) { |
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180 /* free system specific hardware data */ |
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181 SDL_free(joystick->hwdata); |
509
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182 } |
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183 } |
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184 |
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185 /* Function to perform any system-specific joystick related cleanup */ |
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186 void SDL_SYS_JoystickQuit(void) |
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187 { |
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188 return; |
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189 } |